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Diffstat (limited to 'gcc/ChangeLog.3')
| -rw-r--r-- | gcc/ChangeLog.3 | 8063 |
1 files changed, 8063 insertions, 0 deletions
diff --git a/gcc/ChangeLog.3 b/gcc/ChangeLog.3 new file mode 100644 index 00000000000..346311a4267 --- /dev/null +++ b/gcc/ChangeLog.3 @@ -0,0 +1,8063 @@ +Fri Jul 19 18:56:14 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (canon_reg): Allow for recursive call returning 0 (if we had + an EXPR_LIST). + * sched.c (init_aliases_analysis): Ignore REG_EQUAL note when its value + is an EXPR_LIST. + * unroll.c (loop_iterations): Likewise. + + * rs6000.md (andsi3): Fix typo in and-with-cc pattern. + +Fri Jul 19 11:23:22 1991 Tom Wood (wood at dg-rtp.dg.com) + + * toplev.c (set_target_switch): For TARGET_OPTIONS, set the + variable to the variable part of the actual option. + * tm-m88k.h, out-m88k.c: Change the use of m88k_short_data. + + * varasm.c (output_constant_def): Merge get_or_assign_label and + delete it. Ensure that ENCODE_SEGMENT_INFO is evaluated before + SELECT_SECTION. + +Thu Jul 18 19:57:45 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * expr.h (MUST_PASS_IN_STACK_BAD_PADDING): Definitions were backwards. + +Thu Jul 18 17:52:46 1991 Jim Wilson (wilson at wookumz.gnu.ai.mit.edu) + + * unroll.c: Fix typos in comments. + (splittable_regs_updates): New static global variable. + Indicates the number of instructions that modify a split biv + remaining during the last iteration of a loop, so that the last one + can be handled specially. + (unroll_loop): Allocate and clear it. + (copy_loop_body): Use it to determine how to rewrite an insn + modifying a split iv. + (find_splittable_regs): When a splittable biv is identified, set it + equal to the number of insn modifying the biv. + (find_splittable_givs): When a splittable giv is identified, set + it to one if this giv is a reg. + + * unroll.c (copy_loop_body): Instead of trying to special case + insns that use start_label, use the label_map to map the start + label to the appropriate label for all insns except those that + must be inverted and redirected. The former code did not handle + tablejumps that used the start_label correctly. + + * integrate.c (copy_rtx_and_substitute): Don't legitimize an + address inside of an ADDRESS rtx. This fails, because this need + not be a validate address, but it is always valid in the context + it appears in. + +Thu Jul 18 08:13:56 1991 Tom Wood (wood at dg-rtp.dg.com) + + * toplev.c (set_target_switch): Support TARGET_OPTIONS for command + options with values. + + * varasm.c (output_constant_def): Set flags with + ENCODE_SEGMENT_INFO for strings and constructors. + * tm-mips.h (ENCODE_SEGMENT_INFO): Must be a VAR_DECL. + + * out-m88k.c, tm-m88k.h, m88k.md: Implement a global pool approach + to short addressing. + + * m88k.md (extendsfdf2, truncdfsf2): Use fsub rather than fadd. + This conforms to IEEE 754 in all rounding modes except round to + negative infinity whereas fadd conforms only in that mode. + +Thu Jul 18 01:01:37 1991 Eric Youngdale (youngdale at v6550c.nrl.navy.mil) + + * make-cc1.com: Add command line to compile reg-stack.c, and add + reg-stack.obj to the list of files passed to the VMS linker. + +Thu Jul 18 00:11:00 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * Makefile.in (enquire.o): Need not depend on gnulib. + (gnulib2): Renamed from gnulib2.portable. + Don't do ranlib. + (gnulib2.portable): Just refers to gnulib2. + (gnulib1.portable): Don't do ranlib. + +Wed Jul 17 11:19:09 1991 Michael Meissner (meissner at geech.gnu.ai.mit.edu) + + * Makefile.in (gcc): Do a -dumpspecs after building gcc so that -B./ + will override any installed specs in /usr/local/lib. + (mostlyclean): Delete *.cpp files which are left if you use + -save-temps. + +Wed Jul 17 06:08:33 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (try_combine): When putting I2 and/or I1 into NEWPAT, + check for a PARALLEL; if so, just put in the relevant SET instead + of making a PARALLEL containing a PARALLEL. + +Tue Jul 16 18:58:51 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (record_value_for_reg): Show we haven't seen the death + of a register once we have seen it modified. + + * reload1.c (reload): If we decide to put a pseudo which used to have + a MEM equiv onto the stack, set SOMETHING_CHANGED and reprocess all + eliminations and pseudos without scanning the insns. + +Tue Jul 16 13:17:14 1991 Michael Meissner (meissner at wookumz.gnu.ai.mit.edu) + + * cplus-decl.c (sigsegv): Make signal handler void for full + prototyping systems. + +Tue Jul 16 12:25:18 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * dbxout.c (dbxout_symbol): Ignore types with no names of any kind. + +Tue Jul 16 07:12:52 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * stmt.c (pushcase, pushcase_range): Return label in *DUPLICATE, + not integer value. + + * rtlanal.c (reg_referenced_p, reg_overlap_mentioned_p): Allow X to + be (cc0) or (pc). + + * combine.c (subst, case SET): Delete code to remove "unnecessary" + SUBREG; code was incorrect and this is done (corrected below) in + simplify_comparison. + (simplify_comparison): Can only remove SUBREG for equality comparisons. + + * expr.c (expand_expr, case COND_EXPR): If condition has side effects, + ensure we evaluate it before evaluating an arm of the COND_EXPR. + +Mon Jul 15 21:59:36 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * rtl.h (FUNCTION_FLAGS_RETURNS_STRUCT): Fix typo in value. + +Mon Jul 15 22:18:40 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * cccp.c (main): Ignore CPATH if -nostdinc. + +Mon Jul 15 22:00:02 1991 Michael Meissner (meissner at churchy.gnu.ai.mit.edu) + + * reload.c (find_reloads): Fix typo (reg_sets_p instead of + reg_set_p). + +Mon Jul 15 21:49:09 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-parse.y (stmt): Emit the nop for the start of a loop + only after the line number. + +Mon Jul 15 16:50:51 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edn) + + * rtlanal.c (reg_set_p): If we are passed an insn, only pass the + pattern to note_stores. + + * local-alloc.c (validate_equiv_mem): A CALL_INSN invalidates all + memory. + +Sun Jul 14 06:34:47 1991 Richard Kenner (kenner at vlsi1.ultra.hyu.edu) + + * cse.c (last_jump_equiv_class): New variable. + (record_jump_equiv): Set it. + (cse_insn): Clear it. + (cse_around_loop): Invalidate all entries in last_jump_equiv_class. + (cse_set_around_loop): Ensure our replacement is cheaper. + +Sat Jul 13 17:15:30 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * cplus-decl.c (finish_enum): Fix typo in arguments for finish_decl. + * cplus-class.c (finish_struct): Likewise. + +Fri Jul 12 16:45:02 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * dbxout.c (dbxout_symbol): Don't crash when DECL_NAME is 0. + +Fri Jul 12 15:38:24 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * expr.c (do_tablejump): Don't write BARRIER between jump and table + if they must remain adjacent. + + * varasm.c (make_decl_rtl): Set REG_USERVAR_P when register name + is specified. + * integrate.c (subst_constants): Don't substitute for a user + variable assigned to a hard register. + + * reload.c (find_reloads): Add new vars no_{input,output}_reloads to + indicate when the corresponding reload type is not permitted; reject + an alternative that would try such a reload. + * rs6000.md (decrement-and-branch): No longer need kludges to + avoid output reloads. + Use '0' instead of 'c' for input 1 in alternative 0. + Allow operand 0 to be in non-general register. + +Fri Jul 12 10:54:39 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * c-decl.c (finish_struct, finish_enum): Fix typo in arguments for + finish_decl. + + * i386.md (bit test patterns): Delete bit tests using implicitly + masked bit number operand: the hardware doesn't work like that. + +Fri Jul 12 09:50:43 1991 Michael Meissner (meissner at spiff.gnu.ai.mit.edu) + + * tm-hp9k2bsd.h (toplevel): Remove RCS HISTORY log. + +Thu Jul 11 00:46:48 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-parse.y (yylex): Do try signed int for ANSI nondecimal constants. + + * c-typeck.c (record_format_info): The first time, use xmalloc. + +Wed Jul 10 18:54:26 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * jump.c (jump_optimize): Fix typo in "if (...) x = a; else x = b;" + case: had temp3 instead of temp4. + + * cplus-lex.c (lineno, end_of_file): Move definition to before + first use. + (reinit_parse_for_block): Variable `c' must be int to ensure EOF fits. + * cplus-input.c (getch): Remove extraneous declaration of end_of_file. + + * reload1.c: Include insn-flags.h. + (emit_reload_insns): Handle the case where we reload an entire + address; use "reload_load_address" pattern, if it exists. + Remove explicit SImode reference; should have been Pmode, but + IN can be used instead of rebuilding it. + * Makefile.in (reload1.o): Includes insn-flags.h. + + * reload.c (find_reloads): If replacing an output REG with a MEM, + write a CLOBBER for the REG after the insn. + * reload1.c (eliminate_regs): Add new arg INSN; if nonzero, add a + CLOBBER when replacing a REG in SET_DEST with a MEM. + (reload, eliminate_regs_in_insn): Add new arg to eliminate_regs. + * dwarfout.c (output_bound_representation, location_attribute): + Likewise. + + * reload1.c (reload): If a reg_equiv_memory_loc isn't strictly valid + and isn't sufficiently simple, use a stack slot instead. + (alter_regs): Don't delete reg_equiv_init insns here. + (reload_as_needed): Do it here. + + * stor-layout.c (get_best_mode): Correct test for alignment. + + * loop.c (move_movables): Don't get confused by NOTE insns in gnulib + call sequence. + +Wed Jul 10 18:40:32 1991 Matthew Self (mself at geech.gnu.ai.mit.edu) + + * cccp.c (enum node_type): Added T_WARNING. + + * cccp.c (directive_table): Added #warning. + + * cccp.c (do_warning): Print warning message and continue. + +Wed Jul 10 18:38:28 1991 Matthew Self (mself at geech.gnu.ai.mit.edu) + + * c-parse.y, objc-parse.y (attrib): Pass "format" attribute + through. Takes one identifier and two constants as args. + identifier must be either printf or scanf. + + * c-common.c (decl_attributes): Process "format" attributes. + Call new routine record_format_info(). + + * c-typeck.c (struct function_info): Changed function_ident field; + store identifier node rather than char * to speed lookup. + Renamed arg_num field to format_num. Replaced is_varargs field + with new first_arg_num field. + + * c-typeck.c (check_format): Modified to use new arg_num and + first_arg_num fields. + + * c-typeck.c (record_format_info): New routine. Replaces static + table of functions to check. + + * cplus-typeck.c (record_format_info): New stub routine so c++ + will link. Someone should implement format checking for c++. + + * c-typeck.c (init_format_info_table): New routine to add + entries for ANSI functions to table. + + * c-decl.c (init_decl_processing): Call init_format_info_table(). + + * c-typeck.c (build_function_call): Modified to use dynamic table + rather than static one. Compare identifier nodes rather than + using strcmp(). + + * gcc.texinfo (): Document "format" attribute. + + * c-typeck.c (check_format): Call warning() directly rather than + returning the warning string. This way we can give multiple warnings + by continuing. Several changes to make continuing safe. + + * c-typeck.c (build_function_call): Incorporated changed return + value of check_format(). + + * c-typeck.c (check_format): Check for NULL format string. + +Wed Jul 10 16:40:54 1991 Tom Wood (wood at dg-rtp.dg.com) + + * sdbout.c (sdbout_tags): Delete this and use the TYPE_DECL + representation of tagged types. Types are now output in their + original lexical order. + (sdbout_symbol): Return early (only using sdbout_one_type) when a + tagged type is encountered. + (sdbout_block, sdbout_symbol): Don't use sdbout_tags. + * toplev.c (compile_file): Don't use sdbout_tags. + * varasm.c (assemble_function): Don't use sdbout_tags. + +Wed Jul 10 15:13:33 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * dbxout.c (dbxout_tags): Function deleted. Calls deleted too. + (dbxout_tagged_type): New function. + (dbxout_symbol): Call that. + * toplev.c (compile_file): Call to dbxout_tags deleted. + + * c-parse.y (yylex): Simplify choice of type for integers. + When traditional, all integers are signed unless explicitly unsigned. + +Wed Jul 10 13:35:27 1991 Tom Wood (wood at dg-rtp.dg.com) + + * configure (m88k-svr4): Needs make-m88ksvr4. + * make-m88ksvr4: New file. + +Wed Jul 10 13:18:03 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-decl.c (duplicate_decls): Warn if `inline' is not consistent. + + * cccp.c (hack_vms_include_specification): Fix typos. + +Tue Jul 9 22:21:22 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * loop.c (find_and_verify_loops): RETURN insns aren't listed in + loop_number_exit_labels, so don't try to remove JUMP_LABEL of a + RETURN from that list. + + * rtlanal.c (reg_referenced_between_p): New function. + * jump.c (jump_optimize): Use it instead of reg_used_between_p when + checking for "if (...) x = a; else x = b;" case. + +Tue Jul 9 13:03:53 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * expr.c (move_block_to_reg): Don't force_const_mem on non-constant. + +Tue Jul 9 09:13:32 1991 Tom Wood (wood at dg-rtp.dg.com) + + * c-decl.c (finish_struct): Record tagged types as a TYPE_DECL + with a NULL DECL_NAME. + (finish_enum): Ditto. + * cplus-decl.c (finish_enum): Ditto. + * cplus-class.c (finish_struct): Ditto. + + * dbxout.c (dbxout_symbol): Ignore TYPE_DECLs for tagged types. + * cplus-dbxout.c (dbxout_symbol): Ditto. + * sdbout.c (sdbout_symbol): Ditto. + + * toplev.c (compile_file): DECL_NAME may be null. + + * dwarfout.c (output_symbol): Use output_dies_for_tagged_type for + TYPE_DECLs of tagged types. + (dwarfout_output_tagged_type): Deleted. + (output_dies_for_tagged_type): Mark TREE_ASM_WRITTEN early. + +Mon Jul 8 19:36:44 1991 Tom Wood (wood at dg-rtp.dg.com) + + * jump.c (jump_optimize): Check for extra labels when detecting + "if (...) x = a; else x = b;". Include the insn for "x = a;" when + testing for data conflict. + +Mon Jul 8 19:34:14 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * integrate.c (copy_for_inline, case MEM): Must copy a MEM even if + it has a constant address if that address involves a LABEL_REF. + + * rtlanal.c (reg_set_p): Only check for REG_INC notes and a CALL_INSN + if we are passed an insn. + * local-alloc.c (optimize_reg_copy): Remove tests now done in + reg_set_p. + +Mon Jul 8 16:38:49 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-parse.y (yylex): Pedantic warning here for `asm'. + No warning for `__asm__'. + (maybe_type_qual, maybeasm, extdef): No warning here. + + * objc-actions.c: Rename OBJC_SELS_R_INTS to OBJC_INT_SELECTORS. + Rename OBJC_UNIQUE_SELS to OBJ_NONUNIQUE_SELECTORS, reversing sense. + Eliminate OBJC_SELS_R_STRUCT_PTRS. + +Mon Jul 8 06:37:00 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * rtlanal.c (reg_{used,set}_between_p): Allow FROM_INSN == TO_INSN; + return 0 in that case. + + * jump.c (mark_jump_label): Fix typo in use of GET_RTX_LENGTH. + + * reload.c (reload_strict_low): Change comment to say that this is + always zero; we don't use it any more. + +Sun Jul 7 22:14:13 1991 Michael Meissner (meissner@churchy.gnu.ai.mit.edu) + + * tm-mips.h (FRAME_POINTER_REQUIRED): Fix typo that required a frame + if alloca was not called, instead of the reverse. + +Sun Jul 7 17:14:17 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * cccp.c (struct file_buf): New field system_header_p. + Everything that pushes on instack now initializes this field. + (finclude): New arg to set that field. Callers changed. + (do_include): Pass that arg as 1 for <...>, else 0. + + * cccp.c (do_include): Warn for first use of #import + except in system header files. + (handle_directive): Support #import if compiling for Next. + + * cccp.c (do_pragma): For #pragma once, warn it is obsolete. + +Sun Jul 7 14:29:04 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * tm-att386.h (NO_DOLLAR_IN_LABEL): Define this here, + * tm-i386sco.h (NO_DOLLAR_IN_LABEL): not here. + +Sun Jul 7 06:20:03 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * rtlanal.c (reg_set_p): Return 1 if REG is found in a REG_INC + note or if INSN is a CALL_INSN and REG is a hard reg. + (reg_set_last): Only return a register or constant; if returning a + register, ensure it isn't modified between the SET we found and INSN. + + * jump.c (jump_optimize): If SMALL_REGISTER_CLASSES, don't make a + store-flag insn if any register involved is a hard reg. + +Sat Jul 6 14:51:15 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * expr.c (expand_assignment): Don't abort for volatile structure field + even if the structure is in a register. + NOTE: This leaves the problem of implementing whatever meaning + a volatile field should actually have. + + * fold-const.c (div_and_round_double): Make lnum and lden unsigned. + Use the small-denominator algorithm only for denom < 2**24. + Fix backward conditionals in ?: operators in general case. + Change i + j to i - 1 + j when indexing num. + +Fri Jul 5 21:36:57 1991 Ken Raeburn (raeburn at watch.com) + + * genpeep.c (match_rtx, case MATCH_OP_DUP): Output semicolon after + "goto" statement. + +Fri Jul 5 09:45:56 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * rs6000.md (andsi3): Bias alternatives so we always prefer constants. + (define_splits of DImode, SFmode, and DFmode): Don't split + unless after reload. + (ashldi3, lshrdi3): Fix bugs in instruction order; use & in + output constraint so can't conflict with operand 2; use '0' + constraint to allow operands 0 and 1 to be the same register. + + * regclass.c (reg_n_sets): Move definition before use. + + * reorg.c (fill_simple_delay_slots): Candidate for delay slot cannot + set anything set between it and the delay insn. + + * jump.c (jump_optimize): In "if (...) x = a; else x = b;", correctly + specify range to check if X is used or set. + Use rtx_equal_p to check for matching X. + +Thu Jul 4 15:55:45 1991 Tom Wood (wood at geech.gnu.ai.mit.edu) + + * cccp.c (default_include): Add /usr/mach/include for MACH systems. + + * configure (m88k-luna): Needs make-m88kluna. + * make-m88kluna: New file. + + * dwarf.h: New file derived from the UNIX International + Programming Languages Special Interest Group DWARF specification. + * dwarfout.c (includes): Include "dwarf.h". + (subscript_data_attribute): Use FMT_CODE to encode array subscripts. + (languagribute): LANG type no longer provided by dwarf.h. + (output_source_file_die): Determine proper language attribute. + +Thu Jul 4 12:14:16 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * cplus-xref.c: define rindex if USG + +Thu Jul 4 12:36:55 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * gcc.c (process_command): Correctly split -L from its arg. + * SWITCHES_NEED_SPACES: New host machine option. + This really ought to be defined now for certain hosts, + but I don't know which ones they are. + +Wed Jul 3 23:31:00 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * tm-m68k.h (ASM_OUTPUT_FLOAT): Check CROSS_COMPILE (there was a typo). + +Wed Jul 3 22:05:55 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (simplify_binary_operation, case MINUS): Fix typo in op number. + + * cse.c (cse_basic_block): Correctly handle the case where TO + was a label with zero uses at the end of the function. + + * combine.c (significant_valid): New variable. + (combine_instructions): Turn significant_valid off until after + we finished computing reg_significant. + (significant_bits): Ignore reg_significant when significant_valid + is zero. + + * rtlanal.c (reg_set_last): Go past CALL_INSN as long as we are not + looking for a hard register. + +Wed Jul 3 21:07:18 1991 Jim Wilson (wilson at wookumz.gnu.ai.mit.edu) + + * sched.c (schedule_block): When computing what registers are dead + at the end of the current block, correctly handle REG_DEAD notes + that refer to multi-word hard registers. + + * loop.c (mark_loop_jump): When invalidating loops with multiple + entries, must invalidate every nested loop containing the target + of a loop entry jump, except for those that also contain the jump + itself. + + * loop.c (record_giv): When computing whether a giv is + replaceable, check whether the biv update has a valid luid, and + mark it as not replaceable if not. + + * combine.c (gen_rtx_combine): Call rtx_alloc instead of gen_rtx, + because it is much faster, especially on some RISC machines. + + * fixincludes: Add optional argument which indicates where to put + the fixed include files. Echo the directory name where the + include files will be put. + + * cccp.c (struct default_include): Don't examine + STANDARD_INCLUDE_DIR or /usr/local/include when + NO_STANDARD_INCLUDE_DIR is defined. This is useful when building + cross compilers. + (main): Only send SIGPIPE signal if the SIGPIPE signal exists on + the host. + (rescan, handle_directive, skip_if_group, validate_else, + skip_to_end_of_comment, macarg1, discard_comments): Accept '//' as + a comment in Objective-C as well as C++. The Objective C language + specifies that '//' starts a comment. + + * .gdbinit (ptn): Define new macro to print out the name of a type + node. + + * stab.def: Correct errors in table for values of DSLINE and + BSLINE. Document the conflict between BROWS and BSLINE. Document + the value of the BROWS field. + +Tue Jul 2 23:26:20 1991 Michael Meissner (meissner at pogo.gnu.ai.mit.edu) + + * mips-tfile.c (toplevel): Add a comment explaining the MIPS ECOFF + file format at the start of the file. + +Tue Jul 2 14:00:39 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-typeck.c (build_array_ref): Report error here if the "array" + is not an array or pointer. Don't leave this for the PLUS_EXPR. + + * cccp.c: Inlcude containing file names/lines in error messages. + (print_containing_files): New function. + (error*, warning): Call it. + (finclude): Increment input_file_stack_tick when file changes. + + * cccp.c: Include descrip.h. + +Tue Jul 2 07:44:19 1991 Tom Wood (wood at geech.gnu.ai.mit.edu) + + * tm-m88k.h (ASM_OUTPUT_SOURCE_LINE): Define only for SDB. + * tm-m88kdgux.h (AS_BUG_*): Support these for now. + + * c-decl.c (finish_struct): Invoke dwarfout_output_tagged_type + only when producing DWARF debugging info. + * cplus-class.c (finish_struct): Ditto. + +Mon Jul 1 23:03:34 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * toplev.c (compile_file): Close stack_reg_dump_file iff STACK_REGS. + +Mon Jul 1 15:17:57 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (set_significant): Ignore CLOBBERs. + (simplify_and_const_int, case SUBREG): Only ignore paradoxical SUBREGs + if BYTE_LOADS_ZERO_EXTEND. + (record_value_for_reg): Fix typo; had I for REGNO. + +Mon Jul 1 08:28:09 1991 Tom Wood (wood at dg-rtp.dg.com) + + * final.c (output_source_line): Output DWARF line numbers. + + * dwarfout.c (dwarfout_output_tagged_type): New function. + * c-decl.c (finish_struct): Call it. + * cplus-class.c (finish_struct): Call it. + + * dwarfout.c (includes): Need insn-config.h and reload.h. + (location_attribute): Use eliminate_regs for correct expression. + (output_bound_representation): Use SAVE_EXPR_RTL to get rtl and + then use eliminate_regs. + + * reload1.c (reload): When finished, indicate reg_equiv_constant + and reg_equiv_memory_loc are no longer valid. + (eliminate_regs): Don't attempt use of reg_equiv_constant or + reg_equiv_memory_loc if they aren't valid. No longer static. + * reload.h: Declare eliminate_regs. + + * toplev.c (compile_file): Only call dwarfout_file_scope_symbol + for VAR_DECLs. + +Sun Jun 30 15:49:39 1991 Ken Raeburn (raeburn at watch.com) + + * expr.c (expand_builtin, case BUILT_IN_MEMCPY): If alignment test + fails, and function was really BUILT_IN_STRCPY, zero out length + parameter before expanding call. + +Sun Jun 30 18:27:14 1991 Richard Kenner (kenner at vlsi1.ultra.nyu) + + * jump.c (jump_optimize): In "if (...) x = a; else x = b;", don't + move the "x = b;" if the test modifies X or if X is a hard register + and SMALL_REGISTER_CLASSES is defined. + Turn "if (...) x = 1; else {...} if (x) ..." code on when we have cc0. + +Sun Jun 30 13:49:03 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * gnulib2.c (__builtin_saveregs): + For i860, make data structure fit in with va-i860.h. + + * tree.c (gcc_obstack_init): + Support OBSTACK_CHUNK_ALLOC and OBSTACK_CHUNK_FREE. + + * calls.c (prepare_call_address): 3rd arg now address of chain var. + (expand_call): Call changed. + * expr.c (emit_library_call): Call changed. + + * function.c (fix_lexical_addr): In recursive call, pass slot address. + + * Makefile.in (cse.o): Added deps. + + * Makefile.in (GNULIB2_CFLAGS): Use -O2. + + * gnulib1.c, gnulib2.c (abort): Undefine only if defined. + + * genattr.c (main): Fix typo in comment end. + +Sat Jun 29 21:57:28 1991 Torbjorn Granlund (tege at zevs.sics.se) + + * longlong.h (__sparc8__ umul_ppmm): Insert 3 nop:s for wr delay. + * longlong.h (___IBMR2__): Define umul_ppmm, add_ssaaaa, sub_ddmmss.. + * longlong.h (__sparc__): Don't call .umul; expand asm instead. + Don't define __umulsidi3 (i.e. use default definition). + +Sat Jun 29 06:25:19 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * tm-vax.h (CPP_SPEC): New macro. + (LIB_SPEC): Handle -mg. + + * cccp.c (install_builtins): Fix backward test of objc. + + * fold-const.c (size_int): No need to test sign of NUMBER. + + * gcc.c (process_command): Split -L from its arg. + + * gcc.c (S_ISREG): Define if not defined. + (delete_temp_files): Use it. + + * limits.h (UCHAR_MAX, CHAR_MAX, USHRT_MAX): Delete `U'. + (LONG_MAX, ULONG_MAX): Add `L'. + +Fri Jun 28 22:22:58 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * Makefile (realclean): Delete stage1, stage2, stage3. + + * gcc.c (fatal) [HAVE_VFPRINTF]: Do print program name. + +Fri Jun 28 15:34:08 1991 Jim Wilson (wilson at wookumz.gnu.ai.mit.edu) + + * out-sparc.c (output_block_move): Correctly handle the case where + the size is not a CONST_INT, and has a value of 0. + + * flags.h (flag_no_inline): Modify comment to match the one in + toplev.c. + + * integrate.c (copy_rtx_and_substitute): When creating new rtx, + make sure all of the new bitfields are copied, e.g. + REG_LOOP_TEST_P, LABEL_OUTPUT_LOOP_P, etc. + + * loop.c (loop_optimize): Call reg_scan after + find_and_verify_loops, because it may change register lifetimes. + (find_and_verify_loops): After moving a block of code outside the + loop, must readjust the loop_number_exit_label and + LABEL_OUTSIDE_LOOP_P data of the modified jump and the moved jump. + toplev.c (rest_of_compilation): Delete reg_scan call before + loop_optimize. + +Fri Jun 28 13:16:37 1991 Michael Meissner (meissner at osf.org) + + * tm-mips.h (toplevel): Add target_flags to externals declared. + (toplevel): Add dslots_number_nops, mips_load_reg{,2}, + mips_fill_delay_slot external declarations for delay slot reorg. + (CC1PLUS_SPEC): By default, pass -fno-gnu-binutils to cc1plus. + (TARGET_FLAGS): Add -mwc8, -mwc16, -mwc32 to set size of wchar_t, + though the switches are not used right now. + (TARGET_FLAGS): Add -msoft-float code from rfg@ncd.com to compile + on systems w/o floating point. + (TARGET_FLAGS): -mdebugf suppresses filling load delay slots. + (HARD_REGNO_OK): Relax constraints, allow anything in GP + registers, anything in even FP registers, int's only in multiply + and divide registers, int/CC in the FPSW register. + (FRAME_POINTER_REQUIRED): Require frame if alloca is called for + now. + (REG_CLASS_FROM_LETTER): Index from an array (mips_char_to_class) + instead of having lots of ?:'s. Also, allow 'd' to signify GP + registers. + (ENCODE_SEGMENT_INFO): Only record things being in small data/bss + if -mgpOPT (-O sets by default), -O, and -G xx where xx > 0. + (FINAL_PRESCAN_INSN): Rework to automatically not fill the + previous instruction's load delay slots with nop's if it is safe. + (ASM_OUTPUT_LABEL): If compiling collect, don't use assemble_name. + (ASM_GLOBALIZE_LABEL): If compiling collect, don't use + assemble_name. + (ASM_OUTPUT_LABELREF_AS_INT): Define this for collect. + (ASM_OUTPUT_INT): If collect, don't use output_addr_const. + + * mips.md (all floating point): If -msoft-float, don't allow any + floating point builtin operations. + (all patterns): Use 'd' constraint to limit things to GP + registers, rather than 'r'. This allows unions of + float/int/double to occupy any registers. + (*extend*): Call mips_move_1word to handle loads, which in turn + sees if we can omit the load nop. + (fix_trunc*): Redo, since register allocator can handle moving to + the appropriate register set. + (movdf_xfer*): Use explicit return's instead of falling through + and having the appropriate value in a register from the previous + call. + (movsf_xfer*): New patterns to accomidate unions of floats and + int's. + (movsi_unaligned): New define_expand to call either movsi_ulw or + movsi_usw. Also, if not a memory operation, use movsi. + (movsi_ulw): Set up to omit load delay nop if we can. + (movsi_usw): Use memory_operand instead of simple_memory_operand. + Also, allow storing 0 to an unaligned location. + (various move patterns): mips_move_1word now takes a third + argument to specify whether a load should sign or zero extend. + (call_value): Use register_operand on return value. + (probe): Turn into define_expand, and set a register to the + contents of memory pointed to by the stack pointer with volatil + set. + + * out-mips.c (toplevel): Add new global variables: + dslots_number_nops, mips_load_reg{,2}, mips_regno_to_class, + mips_char_to_class. + (simple_memory_operand): If not optimizing, no global memory + reference is assumed to be in the GP area. + (mips_fill_delay_slot): New function to tell FINAL_PRESCAN_INSN + the current insn is a load and may need a nop. + (mips_move_1word): Take a third argument to say whether load byte + and load half-word sign extend or zero extend. Change all + callers. If this is a load, call mips_fill_delay_slots to + schedule the nops. Change all return's to setting a variable, and + falling through to the end. + (mips_move_2words): If this is a load, call mips_fill_delay_slots + to schedule the nops. Change all return's to setting a variable, + and falling through to the end. + (function_arg): if -msoft-float, floating point is passed in GP + registers. + (override_options): Initialize mips_char_to_class. + (print_operand): %( and %) no longer do .set nomacro. + (print_operand): %# prints #nop if gas or -mstats. + (print_operand): Check for too many %), %], and %>'s. + (compute_frame_size): Allocate space in stack to hold FP, just in + case we later need a FP and previously thought we could eliminate + it. + (save_restore): Take a string to indicate the 2word load/store to + use, but don't use it at present. Change all callers. Home + varargs registers with sd if we can. + (function_epilogue): Deal with one or more outstanding nop's from + FINAL_PRESCAN_INSN. + (function_epilogue): Revamp -mstats output format. + (function_epilogue): Zero new global variables. + + * make-decrose (toplevel): Sort make variables. + (CLIB): Add -lld library. + (LANGUAGES): Add build of collect-osf and g++. + (ULTRIX_DIR): Change internal work directory location. + (cplus-lex.o): Don't optimize to avoid problem with 1.39 compiler. + (collect-osf): Add rules to build OSF/rose version of collect. + + * make-mips (LANGUAGES): Add build of g++. + + * tm-decrose.h (SIZE_TYPE): Specify to be long unsigned int. + (PTRDIFF_TYPE): Specify to be long int. + (WCHAR_TYPE): Specify to be long unsigned int. + + * sdbout.c (plain_type_1): Add support for unknown tags if + SDB_ALLOW_UNKNOWN_REFERENCES is defined. The MIPS ECOFF support + needs this, but standard COFF typically doesn't allow unknown + references. + + * gcc.texinfo (Debugging Info): Document + SDB_ALLOW_UNKNOWN_REFERENCES and SDB_ALLOW_FORWARD_REFERENCES. + + * collect-osf.c (whole file): New file to provide collect support + on OSF/rose. + +Fri Jun 28 09:20:18 1991 Tom Wood (wood at dg-rtp.dg.com) + + * configure (m88k-luna): New target. + * tm-m88kluna.h: New file for the Omron Luna/88k. + * xm-m88k.h: Don't use USG for the luna88k. + + * tm-m88kdgux.h: DG/UX implements coff and elf. Currently elf is + a strange variant of coff that's non-standard (it uses SDB + debugging info for example). Soon, the DG/UX elf will support + DWARF. These changes provide transitional support for all three. + (DWARF_DEBUGGING_INFO, SDB_DEBUGGING_INFO): Define both. + (VERSION_0300_SYNTAX): True when -msvr4 and -mversion-03.00. + * tm-m88ksvr4.h (ASM_FILE_END, ASM_OUTPUT_DWARF_LINE): Move these + to tm-m88k.h. They are dwarf specific. + * tm-m88k.h (TARGET_SWITCHES): Add -mversion-03.00 and -mdwarf. + (OVERRIDE_OPTIONS): If using version 03.00 syntax, assume DWARF_DEBUG. + + * tm-m88k.h (REG_ALLOC_ORDER): Adapt slightly for using r26-r29. + + * out-m88k.c (m88k_debugger_offset): Don't complain if the base + register is optimized away. + +Thu Jun 27 21:43:36 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * local-alloc.c (memref_referenced_p, memref_used_between_p): + New functions. + (update_equiv_regs): Call memref_used_between_p. + +Thu Jun 27 19:59:36 1991 Ken Raeburn (raeburn at watch.com) + + * print-tree.c (print_node): Changed the various "lang_#" strings to + indicate which of several possible fields are being examined; new + strings are "tree_#", "decl_#", "type_#". + +Thu Jun 27 15:05:43 1991 Michael Meissner (meissner at churchy.gnu.ai.mit.edu) + + * xm-mips.h (ONLY_INT_FIELDS): Define if not compiling with GCC + since the MIPS compiler treats enum bitfields as signed. + +Wed Jun 26 19:48:16 1991 Jim Wilson (wilson at wookumz.gnu.ai.mit.edu) + + * sched.c (memrefs_conflict_p): Explicitly handle case where both + X and Y are CONST. + (sched_analyze_2): Do create dependencies for insns with REG_EQUIV + notes. + (sched_note_set): Correctly handle the case where the destination + register is a multi-word hard register. + (attach_deaths): Don't add a REG_DEAD note to an insn with a + REG_UNUSED note that mentions the same register. Correctly handle + the case where the destination register is a multi-word hard + register. + (schedule_block): Also call sched_note_set for CLOBBERs when + computing which registers are dead at the end of the basic block. + Also call sched_note_set for USEs when computing what registers + are still live after a just scheduled insn. + (regno_use_in): New function, subroutine of split_hard_reg_notes. + Searches an rtx for any reference to the given register, and + returns the register rtx used if any. + (split_hard_reg_notes): New function. Handles the case where a + multi-word hard register with a REG_DEAD note gets split. Creates + a new REG_DEAD note for each part of the original hard register + used by the split insns. + (new_insn_dead_notes): Don't add a REG_DEAD note to an insn with a + REG_UNUSED note which mentions the same register. + (update_links): Add call to new function split_hard_reg_notes. + Correctly handle the case when the dest of the original insn was a + multi-word register which was split in the split insns. In this + case, the dest is no longer killed here, so must remove the + REG_DEAD on the last previous insn in this basic block which used + dest, if any such exists. + + * unroll.c (reg_dead_after_loop): Check that a CODE_LABEL which is + the target of a JUMP_INSN has a non-zero PREV_INSN field before + trying to derefence it. Fail if there is no previous insn. + + * loop.c (scan_loop): Fix typo. + * local-alloc.c (optimize_reg_copy): Likewise. + * global-alloc (hard_reg_copy_preferences): Likewise. + * gcc.texinfo (REG_LOOP_TEST_P): Likewise. + * optabs.c (expand_float): Likewise. + * tm-vaxv.h (ASM_OUTPUT_ASCII): Likewise. + + * out-sparc.c (output_move_double): Sign extend CONST_INTs that + feed DImode targets. + * tm-sparc.h (GO_IF_LEGITIMATE_ADDRESS): Don't accept a LABEL_REF + as a legal address. Also, delete obsolete parts of preceeding + comment. + + * reload1.c (alter_reg): Only try to delete the reg_equiv_init + insn if it hasn't already been deleted by a previous call to + delete_dead_insn. + + * toplev.c (main): Handle -gdbx in addition to -gsdb for + orthogonality. + * gcc.texinfo: Document -gdbx. + +Tue Jun 25 09:57:08 1991 Tom Wood (wood at dg-rtp.dg.com) + + * m88k.md (casesi): Don't emit a barrier; the dispatch code must + adjoin the table. + * tm-m88k.h (DONT_REDUCE_ADDR): Don't use this. + (CONDITIONAL_REGISTER_USAGE): The PIC register is also call-used. + * out-m88k.c (m88k_layout_frame): Save the PIC register. + +Tue Jun 25 07:40:43 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * function.c (expand_function_end): FNDECL should + be CURRENT_FUNCTION_DECL. + + * combine.c (find_split_point): If we see an AND operation as the + first operand of some non-AND operation, use it as a split point. + (subst): Add counter to limit restarts, go to restart more often. + (subst, case AND): If we get (ior (and (X C1) C2)) and can't + restart more than once, rewrite with C1 as small as possible and exit. + + * cse.c (cse_end_of_basic_block): Don't put branch in our path more + than once. + (cse_main): Clear PATH_SIZE when skipping a block. + (cse_basic_block): Use GET_RTX_CLASS. + +Tue Jun 25 07:39:29 1991 Matthew Self (mself at next.com) + + * varasm.c (const_hash, compare_constant_1, record_constant_1): + For ADDR_EXPR's, don't hash address of SYMBOL_REF. Only use + offset and name of symbol. This allows constructors which + contain pointers to identical string literals to be uniqued. + + * loop.c (loop_optimize, init_loop): Moved call to + gcc_obstack_init() from loop_optimize() to init_loop(). + + * reload1.c (reload, init_reload): Moved call to + gcc_obstack_init() from reload() to new function init_reload(). + + * toplev.c (compile_file): Call new function init_reload(). + +Mon Jun 24 16:05:57 1991 Jim Wilson (wilson at wookumz.gnu.ai.mit.edu) + + * stmt.c (expand_end_stmt_expr): Fix typo in comment. + + * reload1.c (modes_equiv_for_class_p): Only fail if registers in + CLASS that can hold ALLOCATE_MODE can't also hold OTHER_MODE. Do + not fail for the reverse test. ALLOCATE_MODE is always a larger + or same size mode as OTHER_MODE, and will be the mode that reload + uses when allocating spill registers. Rewrite comments to explain + new behaviour. + (reload): Change call to modes_equiv_for_class_p to match new + semantics. + + * combine.c (simplify_shift_const): When simplifying (ashiftrt + (ashift inner_const_int) const_int), was checking the wrong number of + high order bits of inner_const_int. Also correct typos in comments. + + * c-convert.c (convert_to_integer): Must also check ARG1 for + unsignedness, because ARG0 could be a constant when EXPR is a + MINUS_EXPR. + + * combine.c (try_combine): When splitting, it is not safe to use + I2DEST if it is referenced by NEWPAT. + + * combine.c (distribute_notes): After converting REG_DEAD notes to + REG_UNUSED notes, clear PLACE if it already has a REG_UNUSED note, + to prevent adding a duplicate REG_UNUSED note. + + * gcc.texinfo (SIGNED_CHAR_SPEC): Document. + +Mon Jun 24 10:02:32 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (cse_set_around_loop): Ensure the insn we find in front + of the loop does the set in the proper mode. + + * optabs.c (expand_float): Always do conversions to FMODE in the + signedness of the input. + + * reload.c (find_reloads, find_reloads_toplev): If reg_equiv_address + is not a constant address, copy it in case it is shared. + + * reload1.c (eliminate_regs): Copy reg_equiv_memory_loc in case + it is shared and we make a reload inside it. + + * stupid.c (stupid_mark_refs): Registers that aren't used must die + in the insn after their birth so they conflict with other outputs. + + * vax.md: Replace patterns to convert (and (ashiftxx)) + into (and (rotatexx)) with the patterns that are actually made + by combine. + We can allow offsettable addresses for operand 0 and it is not + early-clobber. + + * out-rs6000.c (secondary_reload_class): Correctly interpret result of + true_regnum. + + * out-rs6000.c (output_toc): Write FP constants in TOC. + * tm-r6000.h (TARGET_FP_IN_TOC): New flag. + (TARGET_SWITCHES): Add -mfp-in-toc and -mno-fp-in-toc. + (TARGET_DEFAULT): -mfp-in-toc is the default. + (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P): FP constants may be put in the TOC. + +Mon Jun 24 00:52:44 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * out-i386.c (output_fix_trunc): If the dest operand mentions the + stack pointer, then we must adjust it to account for the temporary + space we allocate on the stack here. + +Sat Jun 22 07:24:33 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (cse_set_around_loop): Fix typo in call to note_mem_written. + + * emit-rtl.c (reorder_insns): Correctly handle case when AFTER is last + insn. + + * expr.c (expand_expr, case COND_EXPR): Correctly handle X ? A : X + 1. + Previous change called invert_truthvalue which can modify EXP; we now + call it a second time to undo its action if do_store_flag fails. + +Sat Jun 22 02:37:59 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * cse.c (cse_set_around_loop): Don't try to initialize an + automatic structure. + + * reg-stack.c (compare_for_stack_reg): If both operands to a + compare are the same stack reg, don't process death on the second. + + * i386.md (all float patterns): Don't allow constants in the + operand predicates. + (all patterns using convert_387_op): Split patterns into one using + FLOAT and another using FLOAT_EXTEND. + +Fri Jun 21 20:37:03 1991 Tom Wood (wood at dg-rtp.dg.com) + + * sched.c (line_note, line_note_head): New vectors for use when + dealing with line-number notes. + (unlink_notes): Put line-number notes in LINE_NOTE for reuse. + (schedule_block): Just before reordering the insns, walk the insns + and record the line-number note in effect for each one. When + reordering is complete, restore the line-number notes as needed. + (schedule_insns): When debugging information is present, allocate + and initialize line_note and line_note_head. After scheduling, + walk the insns to delete redundant line-number notes. + +Fri Jun 21 19:54:29 1991 Jim Wilson (wilson at wookumz.gnu.ai.mit.edu) + + * old-sparc.c, out-old-sparc.c, tm-old-sparc.h: Delete obsolete + files. + + * loop.c (loop_number_exit_labels): Expand comment. Mention that + returns are not included because all bivs and givs are pseudos and + hence must be dead after a return. + +Fri Jun 21 07:10:56 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (subst, case PLUS, MINUS): Remove cases for things like + (x-y)+y; now done in simplify_binary_operation. + * cse.c (simplify_unary_operation): Handle (sign_extend (truncate ..)) + as used in casesi patterns. + (simplify_binary_operation, case PLUS, MINUS): Don't do most + simplifications if IEEE floating-point. + Add cases for things like (x-y)+y. + (fold_rtx): Replace PC with LABEL_REF if we are immediately in + front of a jump table. + Move code to apply associative law to after we have folded the + operands. + (fold_rtx, case MEM): Fix errors in checking for index of jump + table being out of range. + For ADDR_DIFF_VEC, return a MINUS or (truncate (minus L1 L2)). + (fold_rtx, case PLUS): If we have (plus X (label_ref L)), see + if X is equivalent to (minus L1 L2). + (cse_insn): Put (minus L1 L2) in `src_const' so it gets in a + REG_EQUAL note and gets put in the hash table. + If we are branching to a jump table, we are really branching to + immediately after the jump table + Remove special-case kludge for ADDR_DIFF_VEC; now handled properly. + + * vax.md (casesi): Make pattern agree with machine instruction; + specifically, index is multiplied by two and the comparison is LEU, + not LE. + + * cse.c (equiv_constant): If X is a one-word SUBREG of a larger + quantity, use `lookup_as_function' to see if it is equivalent + to a CONST_INT. + + * jump.c (squeeze_notes): No longer static. + * loop.c (find_and_verify_loops): Need to call squeeze_notes when + moving block of code (see last change). + + * reload.c (find_reloads): When forcing constant to memory, + set recog_operand to the result of find_reloads_toplev. + + * combine.c (subst, case PLUS): Add (c1 - a) + c2 -> (c1+c2) - a. + (subst, case MINUS): Use simplify_binary_operation rather than + making CONST_INT from subtraction of two INTVAL's to ensure it + gets truncated as appropriate for its mode. + Add (c1 - (c2 - a)) -> (c1-c2) + a. + + * a29k.md (negdf2): Use operand_subword_force, not operand_subword. + (movsf): Use operand_subword, not gen_lowpart. + + * out-rs6000.c (u_short_cint_operand): New function. + (print_operand): Support auto-decrement. + + * tm-rs6000.h (OVERRIDE_OPTIONS): Force profiling off. + (PREFERRED_RELOAD_CLASS): Return NO_REGS for real CONST_DOUBLE. + (HAVE_PRE_DECREMENT): Define this. + (GO_IF_LEGITIMATE_ADDRESS, GO_IF_MODE_DEPENDENT_ADDRESS): + Support PRE_DEC. + + * rs6000.md (zero_extendxx): Use rlinm, not andil so we avoid + clobbering cr0. + (arith-and-record patterns): Correct some bad operand numbers. + Put SImode output as operand 0 to improve register tying. + (andsi): Prefer rlinm over andil and andiu. + (load/store-with-update): Add patterns for these instructions. + (allocate_stack): New, replaces stack probe. + (add-and-compare): New patterns, with define_split. + (subtract-one-and-jump): Allow outputs anywhere; handle with + match_scratch and define_split. + + * stmt.c (expand_end_stmt_expr): If `last_expr_value' is 0, set it + to const0_rtx. + + * regclass.c (reg_n_sets): Move definition to before use. + + * jump.c (find_cross_jump): Don't try to substitute REG_EQUAL + values unless they are constants. + +Fri Jun 21 02:37:59 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * reload1.c (reload): Don't clear after_call for each insn. + +Sun Jun 16 17:28:43 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * reload1.c (reload, reload_as_needed, choose_reload_regs): Enable + code to avoid return register when SMALL_REGISTER_CLASSES defined. + + * final.c (final_scan_insn): Don't look for no-op moves if + processor has STACK_REGS. + + * hard-reg-set.h (GO_IF_HARD_REG_EQUAL): New macro. + + * jump.c (cross_jump_death_matters): New variable. + (find_cross_jump): If processor has STACK_REGS, compare death + notes if they matter. + + * toplev.c (compile_file, rest_of_compilation): Support new + stack-regs conversion pass. + (main, compile_file, rest_of_compilation): Add support for -dk to + dump after stack-regs conversion. + * reg-stack.c: New file. Implements stack-regs conversion pass. + * Makefile.in (reg-stack.o): New file. + + * tm-i386.h (STACK_REGS): New macro. + (all register macros): Define all eight float point registers. + (HARD_REGNO_NREGS): Only one float reg is needed for any mode. + (HARD_REGNO_MODE_OK): Move code here from out-i386.c. + (FIRST_STACK_REG,LAST_STACK_REG): New macros. + (ARG_POINTER_REGNUM): Move to reg 16. + (FP_REGNO_P): Recognize all float regs. + (QI_REG_P): New macro. + (STACK_REG_P,NON_STACK_REG_P,STACK_TOP_P): New macros. + (PRESERVE_DEATH_INFO_REGNO_P): Delete. + (OVERLAPPING_REGNO_P): Delete. + (CONST_OK_FOR_LETTER_P): Recognize constant mask for byte or word. + Recognize constant 0..3 for `lea' shifts. + (CONST_DOUBLE_OK_FOR_LETTER_P): + (PREFERRED_RELOAD_CLASS): Don't put CONST_DOUBLE in float regs. + QImode must go in class Q_REGS. Float regs can't hold MODE_INT. + (MOVE_RATIO): New macro. + (SHIFT_COUNT_TRUNCATED): Delete. Bit opcodes don't truncate. + (RTX_COSTS): New macro. + (CONST_COSTS): Make constants cheaper. + (QI_HIGH_REGISTER_NAMES): Renamed from QI_REGISTER_NAMES_TOP. + (INSN_CLOBBERS_REGNO_P): Delete. + (FP_TOP,RETCOM,POP_ONE_POP,FP_CALL1,FP_CALL): Delete. + + * out-i386.c (fp_pop_level): Delete. + (fp_call_internal, output_asm_insn_double_reg_op, via_memory, + fp_store_sf,fp_pop_sf,fp_store_df,fp_pop_df,fp_pop_int, + fp_push_sf,fp_push_df,output_movsf,output_movdf,output_movf, + top_dead_p,call_top_dead_p,fp_top_dead_p1,mentioned_fp_top): Delete. + (hard_regno_mode_ok): Moved to tm-i386.h. + (qi_high_reg_name): New variable. + (output_op_from_reg, output_to_reg): New function. + (singlemove_string,output_move_const_single): No longer static. + (singlemove_string): Use correct operand number in `push' string. + (standard_80387_constant_p): Use recommended method to extract + float from CONST_DOUBLE. + (PRINT_REG): Add 'h' for "high" register names, 'y' for "st(0)". + (print_operand): Code 'z' prints no size suffix for stack regs. + Print DImode suffix as "ll", not just "l". + (output_fix_trunc): New argument `insn'. Generalize to output to + MEM or REG. Return "char *" like other output routines. + Generalize for SImode or DImode output. + (binary_387_op,convert_387_op,float_op,fix_op,shift_op): New + match_operator predicates. + (output_387_binary_op,output_float_compare): New functions. + + * i386.md (all MODE_FLOAT patterns): Replace with new code to use + all FPU registers. + (all patterns): Use AS2 and AS1 macros where possible, for + eventual support of Intel syntax output. + (tstM): Don't initialize operands unless we need to. + (cmpM): Choose operange order in output for speed on i386. + (logical test patterns): The operands commute. If possible, + SImode tests should use just QImode. + (movstrictM): New patterns. + (movqi): Don't allow a constant of unknown value into Q_REGS. + (`lea' pattern): Move after addsi3. + (addsi3): Do three operand adds with `lea'. + (divsi3,divhi3,udivsi3,udivhi3): Delete in favor of u?divmodM4. + (divqi3,udivqi3): Remove earlyclobber for operand 0. + (andM3): Define three operand ANDs for 255 and 65535 using zero + extend opcode. Also directly do an AND in the second byte of a + register. + (iorM3,xorM3): Do byte ior instead of word where possible. + (xorqi3): Allow operands[2] from MEM. + (ashlsi3): Allow three-operand shift of 0..3 with `lea' opcode. + (lshlM3): Redundant, delete. + (shift & rotate patterns): Print %0 as destination operand. + (bit recognizers): New patterns to set, clear and compliment. + (call insns): Use "%P" code for targets to support Intel syntax. + (movstrsi): Express changes to the operands instead of just + clobbering them. Don't accept non-constant move count, as our + code isn't as efficient as a library call. + +Thu Jun 20 13:51:02 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (cse_insn): If we fold a conditional or computed branch to an + unconditional branch, it is now not in the normal format for an + unconditional branch, and it only has one set, delete it and + re-emit it. + Whenever we make an unconditional branch, set `cse_skip_to_next_block' + and do nothing else. + (cse_basic_block): Increment LABEL_NUSES on TO if it is a label + so it won't go away while we are using it as a stopping point. + If we are done with this block (`cse_skip_to_next_block' nonzero), + pretend we just did the insn before TO. + Decrement LABEL_NUSES of TO if it is a label; if it became zero, + delete it and try to extend the basic block. + + * reload.c (find_reloads): Fix typo in check for no alternatives + found. + + * combine.c (reg_significant, significant_mode): New vars. + (combine_instructions): Allocate and initialize reg_significant. + (set_significant): New function. + (significant_bits, case REG): Use reg_significant, if non-zero + as the significant bits of a register. + + * loop.c (n_times_set): Define -2 to mean that a register is + an candidate to be moved and is a constant. + (scan_loop): Set n_times_set to -1 or -2 as appropriate. + (regs_match_p): No need to check REG_FUNCTION_VALUE_P. + A register and a constant can be equal if the register is known + equivalent to the constant. + (invariant_p): Check n_times_set < 0, not == -1. + + * rtl.h (REG_LOOP_TEST_P): New macro. + * jump.c (duplicate_loop_exit_test): Mark registers used only in + loop exit test. + * cse.c (cse_around_loop, cse_check_loop_start, cse_set_around_loop): + New functions. + (cse_end_of_basic_block): Add new arg to say if we are being called + after loop.c has run; if we are being called after loop.c, we can + ignore NOTE_INSN_LOOP_ENDs. + (cse_main): Accept new AFTER_LOOP arg; pass to cse_end_of_basic_block. + If we are called before loop.c, see if we can cse around to the + start of a loop. + * toplev.c (rest_of_compilation): Tell cse_main if it is being called + before or after loop.c. + + * rtl.h (LABEL_OUTSIDE_LOOP_P): New macro. + * loop.h (uid_loop_num): Renamed from luid_loop_num and now + maps INSN_UID to loop number instead of INSN_LUID. + * loop.c (loop_optimize): Modifications for the above. + (find_and_verify_loop): Change luid_loop_num to uid_loop_num. + Look for blocks of code ending in an unconditional branch out + of the loop surrounded by a conditional branch and try to move + such a block out of the loop. + (mark_loop_jump): Change luid_loop_num to uid_loop_num. + Mark all LABEL_REFs that are outside the current loop, for + branch prediction. + (strength_reduce, check_dbra_loop): Change luid_loop_num to + uid_loop_num. + * unroll.c (unroll_loop, find_splittable_{regs,givs}): Likewise. + (reg_dead_after_loop, final_{biv,giv}_value): Likewise. + + * flow.c (reg_n_sets): Don't define this here. + * regclass.c (reg_n_sets): Define it here. + (reg_scan): Allocate and initialize reg_n_sets. + (reg_scan_mark_refs): Count sets of a register in reg_n_sets. + + * sched.c (reg_known_value_size): New variable. + (canon_rtx): Don't look in reg_known_value outside its allocated space. + (init_alias_analysis): Initialize reg_known_value_size. + + * loop.c ({unknown,fixed}_aggregate_altered): Deleted. + (loop_store_mems): Replaces loop_store_addrs and loop_store_widths. + (loop_optimize): Call init_alias_analysis. + (prescan_loop, note_addr_stored): Save all MEMs stored into, rather + than just those that appear fixed; save MEMs rather than addresses + and widths. + (invariant_p): Use true_dependence to see if a MEM is invariant; + compare it with all MEMs stored during the loop. + + * sched.c (memrefs_conflict_p): If XSIZE or YSIZE is zero + the object conflict if they have the same base, irregardless + of the offsets. + + * reorg.c (dbr_schedule): Reallocate unfilled_firstobj after + freeing memory from the obstack. + + * reload.c (push_reload): Always reload object inside SUBREG if + STRICT_LOW_PART is present. + Always set RELOAD_STRICT_LOW to zero; maybe we should get rid of it. + + * reload.c (make_memloc): Copy the address if it varies to avoid + potential sharing problems. + + * global-alloc.c (hard_reg_copy_preferences): New var. + (global_alloc): Allocate and initialze it. + (prune_preferences): Prune it. + (find_reg): Try preferences in hards_reg_copy_preferences first, + then hard_reg_preferences. + (set_preference): Set bit in hard_reg_copy_references, if appropriate. + + * emit-rtl.c (try_split): If we are splitting a JUMP_INSN, copy + JUMP_LABEL from the old to new insn update the count of that label. + + * cse.c (lookup): Always call exp_equiv_p unless we have a REG. + + * cse.c (insert): If we are making a register equivalent to a + constant that was already equivalent to a constant, update + qty_const_insn. + (cse_insn): Don't do it here. + * cse.c (fold_rtx): Always call simplify_unary_operation. + + * cse.c (record_jump_equiv): Don't get primary elements for OP0 and + OP1 since they might not be valid. + + * loop.c (get_condition): Accept new arg, EARLIEST that is a pointer + to where we place the earliest insn used to form the condition. + Check for comparison with CC0 in main loop, not earlier. + Never return condition involving CC0. + (get_condition_for_loop): Call get_condition with new arg. + * jump.c (jump_optimize): When we make store-flag insn, put new + insns before earliest insn used to form condition and use new + psuedo as target, which we copy into VAR immediately after the insn + that currently sets VAR. + Turn off "if (...) x = 1; else {...} if (x) ..." code; it is not + correct and can't be easily fixed. + (get_label_{before_after}): Use {prev,next}_nonnote_insn. + + * jump.c (jump_optimize): Don't interpret NOOP_MOVES as meaning + "after_reload"; check reload_completed instead. Don't pass NOOP_MOVES + to functions that aren't actually trying to noop moves. + (follow_jumps, tension_vector_labels): Don't accept AFTER_RELOAD arg; + check reload_completed instead. + + * combine.c (try_combine): Don't check that we don't have a + single_set when trying to replace a SET_DEST in a PARALLEL in I2. + (simplify_and_const_int): Always do the AND in the mode passed. + (significant_bits, case DIV and UDIV): Nothing special known + about low-order bits here. + (simplify_shift_const, shift cases): Don't go into infinite loop if + we combine two shifts in the same direction. + + * c-parse.y, cplus-parse.y, objc-parse.y (set_yydebug): Move to + end of file so we don't have a reference to yydebug after its + definition; also delete duplicate declaration. + +Thu Jun 20 09:08:21 1991 Tom Wood (wood at geech.gnu.ai.mit.edu) + + * local-alloc.c (block_alloc): Fixed typo in last edit. + +Wed Jun 19 17:05:52 1991 Jim Wilson (wilson at wookumz.gnu.ai.mit.edu) + + * reload.c (push_reload): Verify reload_in[i] exists before using + GET_CODE on it. + + * m88k.md: USE insns must be immediately before CALL_INSNs to work + properly, otherwise sched.c and reorg.c will not associate them will + the CALL. + + * unroll.c (calculate_giv_inc): Accept constant increments + represented as a LO_SUM. + + * flow.c (mark_used_regs): Don't put a REG_DEAD note on insns that + already have a REG_UNUSED note. This makes it consistent with + combine.c. + * combine.c (distribute_notes): If a REG_UNUSED reg is no longer + set by an insn, but is still used by the insn, then must convert + the REG_UNUSED note to a REG_DEAD note. + + * gcc.c (SIGNED_CHAR_SPEC): Put ifndefs around it, so that it can + be overriden by a definition in the tm.h file. + + * cse.c (cse_insn): Add missing third parameter to find_reg_note calls. + + * tm-arm.h (INIT_CUMULATIVE_ARGS): Take LIBNAME as third argument. + + * combine.c (can_combine_p): Remove extra argument in call to + find_reg_note. + + * rtlanal.c (find_regno_note): Verify that the note contains a + REG before checking its REGNO. + + * cse.c (canon_reg): Fix spacing/punctuation error. + * recog.c (constrain_operands): Likewise. + * tree.h: Likewise. + * varasm.c (Assemble function): Likewise. + +Wed Jun 19 13:14:22 1991 Tom Wood (wood at geech.gnu.ai.mit.edu) + + * local-alloc.c (block_alloc): When counting instructions, abort if + a loop is detected. Improperly threaded insns are easy to produce + when working on the scheduler. + +Sat Jun 15 06:13:11 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (simplify_and_const_int, case ASHIFTRT): Avoid infinite + loop if simplify_shift_const doesn't do anything. + +Thu Jun 13 09:05:12 1991 Tom Wood (wood at dg-rtp.dg.com) + + * m88k.md (decrement_and_branch_until_zero): Add this insn. + +Thu Jun 13 07:32:37 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * explow.c (plus_constant): Fix error in last change; CONST case + wasn't handled correctly. + + * tm-m68k.h (CONST_CONSTS): Constants between -7 and -1 are cheap + because of subq. + + * m68k.md (dbra): Operand 0 should have '+' constraint, not '='. + + * expmed.c (store_fixed_bit_field): Clean up some confusion between + targets and results in expand_binop calls. + + * local-alloc.c (optimize_reg_copy): Fix several typos relating to + status updating. + Correctly handle the case where DEST dies before SRC. + Fix some comments that had SRC and DEST backwards. + + * combine.c (can_combine_p): Swap order of args of && to avoid + unnecessary calls to use_crosses_set_p. + (simplify_and_const_int, case SUBREG): Make code agree with comment. + + * emit-rtl.c (operand_subword): Avoid compilation warning. + + * expmed.c (store_fixed_bit_field): Don't use OP0 as SUBTARGET + if it is a MEM and -fforce_mem was specified. + + * expmed.c (emit_store_flag): After scc insns, convert to wider + mode using unsigned conversion if STORE_FLAG_VALUE is positive. + + * expmed.c (init_expmed): Use mode of size BITS_PER_WORD instead + of SImode. + (store_bit_field, extract_bit_field): Replace references to SImode + with MAXMODE. + (store_fixed_bit_field, extract_fixed_bit_field): Don't use explicit + modes; use get_best_mode instead. + (store_split_bit_field, extract_split_bit_field): Use operand_subword + and mode_for_size instead of making SUBREGs and using SImode. + + * stor-layout.c (get_best_mode): Allow LARGEST_MODE to be VOIDmode, + in which case we can use any appropriate mode. + +Wed Jun 12 16:32:37 1991 Michael Tiemann (tiemann at pogo.gnu.ai.mit.edu) + + * cplus-decl.c (init_decl_processing): Compensate for tm-sparc.h + change to WCHAR_TYPE handling. + +Wed Jun 12 10:19:13 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * tm-sparc.h (WCHAR_TYPE): Must be "short unsigned int". + + * combine.c (subst, make_extraction, simplify_shift_const): Don't + change mode of volatile MEM; replaces similar change of June 1st. + * function.c (fixup_var_refs_1, optimize_bit_field): Likewise. + * recog.c (validate_replace_rtx_1): Likewise. + +Tue Jun 11 22:09:28 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * expr.c (expand_expr, case COND_EXPR): Expressions of both the form + X ? A + 1 : A and X ? A : A + 1 were being done, but only the former + was being handled correctly. + +Tue Jun 11 12:13:53 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * recog.c (validate_replace_rtx_1): If putting a CONST_INT in a + ZERO_EXTEND or SIGN_EXTEND, try to simplify the operation or fail; + the semantics of the operation require a non-VOIDmode argument. + + * cse.c (delete_dead_from_cse): Don't delete last insn in a libcall. + + * explow.c (allocate_dynamic_stack_space): Don't clobber SIZE when + rounding it. + + * fold-const.c (fold, case COND_EXPR): Ensure we always return an + expression in the correct type. + + * expr.c (emit_push_insn): Don't need to put X in register if it + is constant; operand_subword_force can do so if needed. + + * reload.c (find_reloads): Simplify nested `if' statements. + * recog.c (constrain_operands): Likewise. + + * jump.c (mark_jump_label): Fix typo (extra paren) in last change. + +Tue Jun 11 10:03:08 1991 Micheal Tiemann (tiemann at pogo.gnu.ai.mit.edu) + + * collect2.c: New file. + + * sched.c (memrefs_conflict_p): Finish removing ASHIFT case. + + * emit-rtl.c (operand_subword): Change test of BITS_PER_WORD < + HOST_BITS_PER_WORD from compile-time to run-time. + * expr.c (emit_push_insn): Ditto. + * recog.c (constrain_operands): Ditto. + * reload.c (find_reloads): Ditto. + + * jump.c (jump_optimize): Add `continue' after deleting INSN in case + where further attempts to optimize the insn are invalid. + (mark_jump_label): Don't crash if NEXT == 0. + +Tue Jun 11 09:14:05 1991 Tom Wood (wood at dg-rtp.dg.com) + + * out-m88k.c (legitimize_operand): New function to convert + CONST_DOUBLE to SFmode when possible. + * m88k.md (cmpdf, adddf3, subdf3, muldf3, divdf3): Use it. + * tm-m88k.h: Declare it. + + * xm-m88k.h (OBSTACK_CHUNK_SIZE): For DG/UX at least, the default + value results in a perfect checkerboard. + +Tue Jun 11 07:23:45 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * expr.c (expand_expr, case FLOAT_EXPR, FIX_EXPR): Don't try to + do any partial conversions here; expand_fix and expand_float now + handle all modes. + * optabs.c (fixtab, fixtrunctab, floattab): Table now contains + all modes. + (can_fix_p, can_float_p): Use mode as index in tables. + (init_fixtab, init_floattab): Likewise. + Add support for QImode and HImode operations. + (expand_float): Rework to remove dependendence on specific modes. + Can only use REAL_VALUE_LDEXP in certain configurations. + (expand_fix): Likewise. + If can't do operation unsigned, or signed into wider mode, emit a + sequence that compares operand with 2**(N-1) and, if larger, + subtracts 2**(N-1), converts, and adds it back. + Protect from queue and force not memory at start. + * m88k.md (fixuns_truncdfsi2, fixuns_truncsfsi2): Deleted; now done + in expand_fix in optabs.c. + + * combine.c (expand_field_assignment): Convert SET_SRC to mode of + INNER. + (simplify_shift_const, case ASHIFTRT): Don't use undefined initial + value of MASK. + + * explow.c: Include insn-config.h, recog.h, and insn-codes.h. + (allocate_dynamic_stack_space): Rework to be more precise in required + alignment. Must maintain alignment of stack to STACK_BOUNDARY at + all times (it must not be momentarily misaligned) and must align + returned address to BIGGEST_ALIGNMENT. + * Makefile.in (explow.o): Show new includes. + +Tue Jun 11 07:22:54 1991 Matthew Self (mself at next.com) + + * m68k.md: Change incorrect reference to -m68040-fp to -m68040-only. + Fix several spelling errors. + + * m68k.md (fix_trunc*f*i2): New insn's to replace fintrz on the + '040. These emit a sequence of insn's to change the rounding mode + to round-to-zero, perform the truncation, and restore the rounding + mode. + +Mon Jun 10 09:57:31 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * c-lang.c (GNU_xref_{begin,end}): Add stub functions for xref info. + + * cplus-decl.c (record_builtin_type): Add support for handling + builtin types' nicknames (e.g. "unsigned long" for "long unsigned + int"). + + * expmed.c (struct algorithm): Change array size from BITS_PER_WORD + to MAX_BITS_PER_WORD. + gcc.texinfo: Document MAX_BITS_PER_WORD. + +Mon Jun 10 07:45:17 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (try_combine): When making an I1 from an I2 that is + a PARALLEL, give the new I1 the same INSN_UID as I2. + + * recog.c (constrain_operands, case 'p'): Pass operand mode + (from match_operand) to strict_memory_address_p. + + * m68k.md (andsi3): bclr does not set the condition codes in the + standard way. + +Sun Jun 9 11:16:24 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reload.c (find_reloads): Swap preferred_class and pref_or_nothing + when we swap commutative operands. + + * combine.c (subst, simplify_shift_const): Treat UDIV and MULT + with a second operand of a constant that is a power of two as the + appropriate shift if it feeds or is fed by a shift. + + * expmed.c (expand_divmod): When searching for the best mode to + perform the computation, take into account the fact that we sometimes + do a shift, not a divide. + + * expmed.c (emit_store_flag): Correctly handle "a = b < 0;" if A + is narrower than B. + Don't check for STORE_FLAG_VALUE equal to just the sign bit of + OP0 if the width of its mode is larger than HOST_BITS_PER_INT. + Use switch rather than if/elseif/elseif. + + * combine.c (simplify_shift_const, shift cases): We were not forming + the mask correctly when VAROP is a LSHIFTRT and narrower than X; + simplify the mask formation by using significant_bits and + simplify_binary_operation. + + * reload.c (make_memloc): Copy RTX_UNCHANGING_P from REG to MEM. + (find_reloads_address, find_reloads_address_1): Don't shortcut + reloading the address in reg_equiv_address; always call + find_reloads_address on it. + + * recog.c (constrain_operands, case 'p'): Validate address if + testing strictly. + + * out-alliant.c, out-m68k.md (output_move_double): Extraction of + parts of CONST_INT was backwards; these machines are words-big-endian. + +Sat Jun 8 12:19:26 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * sparc.md: Remove special-case shift insns which load and shift + memory-based operands. Combine now does this for us. Also change + abs patterns so that they consistently print the negation followed + by the mov on a single line. + + * reload1.c (choose_reload_regs): Cast `enum reg_class' values to + `int' when using them as array indicies. + + * gnulib2.c (LONG_TYPE_SIZE): Don't inherit the definition of + LONG_TYPE_SIZE from tm.h, since that may be target_flag-specific. + Instead synthesize the value from `sizeof (long)'. + + * cplus-gc.c (build_m_desc): Figure out whether the i_desc should + constitute a defn of its type or not. Analogous to May 26 change + for instance variables. + +Sat Jun 8 07:11:26 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (simplify_and_const_int): Detect and remove redundant + alignment operation. + (significant_bits, case REG): Realize that the stack pointer might + be aligned. + (significant_bits, case PLUS, MUNUS, MULT, DIV, UDIV): Track low-order + bits of zero as well as high-order zero bits (so we detect alignment + operations). + (record_value_for_reg): If updating a register, try to substitute its + old value into the expression for better tracking of values. + + * a29k.md (fmac/dmac): Delete incorrect patterns. + +Thu Jun 6 19:08:29 1991 Sean Fagan (sef at cygint.cygnus.com) + + * final.c (output_source_line): Say we are on line number 1 if + sdb_begin_function_line is -1, not 0. + +Thu Jun 6 08:01:05 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * stor-layout.c (get_best_mode): Don't assume GET_MODE_SIZE (SImode) + is UNITS_PER_WORD; if SLOW_BYTE_ACCESS defined, try to return the + mode whose size is UNITS_PER_WORD. + + * sparc.md (floatsisf2, floatsidf2): Add missing mode for + operand 1; use const_int_operand as predicate. + + * cse.c (canon_reg): Add arg INSN; if replacing a pseudo with a hard + register or vice versa, use validate_change to ensure the insn + remains valid. + All callers changed; most pass zero since they validate replacement. + (cse_insn): Use validate_change on result of canon_reg when + required. + + * c-common.c (combine_strings): Use WCHAR_BYTES instead of + UNIT_PER_WORD for the size of a wide char. + + * emit-rtl.c (gen_lowpart_common): Always extract integral modes + from integer CONST_INTs and CONST_DOUBLEs. + + * integrate.c (copy_for_inline, copy_rtx_and_substitute): Don't + try to extract a float from a fixed-mode CONST_DOUBLE. + (copy_for_inline, copy_rtx_and_substitute, restore_constants): + Declare target of REAL_VALUE_FROM_CONST_DOUBLE to be REAL_VALUE_TYPE. + + * local-alloc.c (update_equiv_regs): Fix typo in testing + reg_basic_block. + +Wed Jun 5 09:15:09 1991 Ken Raeburn (raeburn at watch.com) + + * Eliminate unneeded binding levels when overloading template class + names: + * cplus-pt.c (overload_template_name): Accept second argument + classlevel, indicating that new decl should be pushed into current + class binding level; otherwise, assume current level is okay to use. + Callers changed. + (undo_template_name_overload): New second argument classlevel + indicates where binding for variable was made. Callers changed. + + * cplus-parse.y (structsp): Call undo_template_name_overload in all + appropriate cases. + + * Get interface/implementation flags set properly on methods in + class templates, and use it: + * cplus-lex.c (store_pending_inline): If inside a class, walk up + through nested classes to top level looking for template parameters. + For class methods, use current interface flag settings rather than + flags for class. + (extract_interface_info): No longer static. + (do_pending_inlines, process_next_inline): Call + extract_interface_info to get interface flags set properly after + changing file names. + * cplus-pt.c (instantiate_class_template): Ditto. + (end_template_instantiation): Ditto. + (do_pending_expansions): If interface/implementation flags of + containing class are set, use them. + * cplus-tree.h (interface_unknown): Added declaration. + +Wed Jun 5 07:36:44 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reload.c (find_reloads_address): Unshare a MEM if its address is + the address of a constant pool location. + + * optabs.c (expand_binop): Fix typos in multi-word addition; had + MODE for SUBMODE. + + * reload1.c (alter_reg): Correctly delete insn that makes a REG + equivalent to a MEM in the case where the MEM is the SET_DEST. + + * a29k.md (negdf2): Add missing alternative in operands 2. + (movdi): Change "i" constraint to "n". + Split for constant integer as input; split cannot fail. + Correct typo in DEFINE_SPLIT (DFmode for DImode). + * out-a29k.c (gen_reg_or_integer_constant_operand): New function. + + * configure: Fix typo in reference to tm-sun3-nfp.h. + +Wed Jun 5 06:56:10 1991 Matthew Self (mself at next.com) + + * c-parse.y, objc-parse.y (attrib): Always pass aligned attribute + through. Return $1 on failure rather than NULL_TREE for consistency. + + * c-common.c (decl_attributes): Warn if requested alignment is not + a power of two. Also warn if decl is not a VAR_DECL or a FIELD_DECL, + since specifying alignment makes no sense for a TYPE_DECL, and is + not implemented for a FUNCTION_DECL. + + * c-parse.y, objc-parse.y (initdcl, notype_initdcl): Call + decl_attributes before finish_decl in order for alignment attribute + to take effect. + + * varasm.c (assemble_variable): Warn if DECL_ALIGN is greater than + MAX_OFILE_ALIGNMENT, if defined. This allows errors to be + detected with formats like a.out which support a maximum alignment + of 4. + + * c-parse.y, objc-parse.y (component_declarator): Call decl_attributes + with correct args. + + * stor-layout.c (layout_record, layout_union): Do not clamp struct + alignment at BIGGEST_ALIGNMENT, since individual fields may have + requested greater alignment than this. This check shouldn't have + done anything anyway. + + * c-parse.y (unary_expr): When alignof is applied to an expression, + call c_alignof_expr so that we can check DECL_ALIGN instead of calling + c_alignof (TYPE_ALIGN (TREE_TYPE (expr))). + + * c-typeck.c (c_alignof_expr): New function to compute alignof for + expr's. Returns DECL_ALIGN for VAR_DECL's and FIELD_DECL's. Also + return 1 after reporting error about applying alignof to bitfields. + + * c-tree.h (c_alignof_expr): Add declaration. + + * varasm.c (assemble_variable): MAX_OFILE_ALIGNMENT defaults to + BIGGEST_ALIGNMENT if not defined in config.h. + +Wed Jun 5 06:55:12 1991 Tom Wood (wood at dg-rtp.dg.com) + + * m88k.md (mov*): Change the interface to emit_move_sequence. + * out-m88k.c (emit_move_sequence): Similar to the sparc version. + + * tm-m88k.h (SIZE_TYPE): Specify as unsigned int. + + * xm-m88k.h (HOST_BITS_PER_LONGLONG): Define. + +Wed Jun 5 01:45:07 1991 Sean Fagan (sef at cygint.cygnus.com) + + * sdbout.c (sdbout_symbol): don't output definition information for + a nested function inside the parent function; this makes COFF + assemblers upset. + +Tue Jun 4 17:35:13 1991 Sean Fagan (sef at cygint.cygnus.com) + + * function.c (trampoline_address): make the RTL_EXPR node temporary, + not momentary, so that the trampoline_list doesn't become garbage. + Fix made by jim wilson (wilson@cygnus.com). + +Tue Jun 4 09:40:59 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * expr.c (move_block_to_reg): Fix typo in last change. + + * local-alloc.c (update_equiv_regs): Check for reg_n_refs == 2, + not loop_depth * 2. + + * reorg.c (fill_simple_delay_slots): Clear INSN_DELETED_P on insns + placed in current_function_epilogue_delay_list. + + * make-rs6000 (ALLOCA_FLAGS, ALLOCA_FINISH): Add override to + compensate for the fact that the RS/6000 C compiler has no -S. + + * out-rs6000.c (easy_fp_constant): Use operand_subword. + (print_operand): Use INT_P and INT_LOWPART to allow accepting both + CONST_INT and CONST_DOUBLE for integers. + + * rs6000.md (floatsidf2, floatunssidf2): Rework these to emit only + two insns, each of which has DImode or DFmode operands. Then + split the funny DImode insn to generate it. + (fix_truncdfsi2, fixuns_truncdfsi2): Surround our call with + REG_LIBCALL/REG_RETVAL notes. + Use operand_subword. + (movsf, movdf): Correctly handle a pseudo passed during reload. + Use operand_subword. + Split moves involving "easy" FP constants. + (subtract-and-branch): Disable for now, to avoid output reload in jump. + + * tm-rs6000.h (WCHAR_TYPE): Add definition. + (INT_REGNO_P): Fix typo; register 31 is a normal register. + (LEGITIMATE_CONSTANT_P): The only FP constants that are valid are + the "easy" ones. + + * a29k.md (negdf2): Use XOR when not involving accumulator. + Add SCRATCH so we dont use gr122. + Handle case where input and output are same register. + (negsf2): Use SCRATCH. + (DImode operations): Use operand_subword, not gen_{low,high}_part. + (movsf, movdf, movdi): Always split if we can look inside CONST_DOUBLE. + Use operand_subword. + Don't split into separate words in DEFINE_EXPAND. + * out-a29k.c (in_operand): Account for fact that integer CONST_DOUBLE + is VOIDmode. + (extract_subword): Deleted. + (print_operand): Add macros INT_P and INT_LOWPART so we can accept + either CONST_INT or CONST_DOUBLE. + + * romp.md (movdi, movdf, negsf2, negdf2): Use operand_subword and + operand_subword_force, instead of gen_{high,low}part. + Use force_const_mem instead of force_const_double_mem. + + * m88k.md (movdi): Remove 'F' constraint; 'n' now includes integer + CONST_DOUBLE. + (anddi3, iordi3, xordi3): Likewise. + Use operand_subword to extract individual words. + * out-m88k.c (output_load_const_{float,double,dimode}): Use + operand_subword. + + * Makefile.in (emit-rtl.o): Now includes expr.h. + * calls.c (expand_call): Pass mode to move_block_to_reg. + * combine.c (subst, case SUBREG): Simplify SUBREG of hard register + and some SUBREGs of constants. + (gen_lowpart_for_combine): If object is desired mode, always return it. + Use gen_lowpart_common for most cases; just support MEM and + surrounding with a SUBREG here. + * cse.c (insert): CONSTANT_P includes CONST_DOUBLE. + (fold_rtx): Use MODE for GET_MODE (X). + (fold_rtx, case SUBREG): Handle simple cases of folding SUBREGs. + (fold_rtx, case MEM): Use operand_subword and gen_lowpart_if_possible + to get parts of constant instead of gen_lowpart and gen_highpart. + (gen_lowpart_if_possible): Use gen_lowpart_common for most cases. + * expr.c: Include expr.h. + (gen_lowpart_common): New function, from gen_lowpart. + (gen_lowpart): Use gen_lowpart_common for most cases; just handle MEM. + (gen_highpart): Deleted. + (subreg_lowpart_p): Test WORDS_BIG_ENDIAN in `if', not `#if'. + (operand_subword, operand_subword_force): New functions. + * explow.c (plus_constant): Handle adding CONST_INT to CONST_DOUBLE. + Rework to use switch statement. + Remove obsolete OLD_INDEXING code. + (plus_constant_for_output): Use plus_constant for most cases. + (break_out_memory_refs): Refine which constants get broken out. + * expmed.c (store_bit_field, extract_bit_field): Don't use + gen_highpart for multi-word fields; instead, loop and use + operand_subword. We now support fields more than two words long. + (mask_rtx, lshift_value): Just pass high and low words to + immed_double_const; it will mask and choose CONST_INT vs. CONST_DOUBLE. + * expr.c (convert_move): Use operand_subword instead of gen_highpart. + Don't assume GET_MODE_SIZE (DImode) > UNITS_PER_WORD. + (move_block_to_reg): Add MODE arg. + Use operand_subword_force. + (move_block_from_reg): Use operand_subword. + (move_block_from_reg, move_block_to_reg, use_rgs): + Don't assume GET_MODE_SIZE (SImode) == UNITS_PER_WORD. + (emit_move_insn, emit_push_insn): Likewise. + Use operand_subword and operand_subword_force. + (expand_expr, case INTEGER_CST): Just call immed_double_const. + (expand_expr, cases FIX_TRUNC_EXPR, FLOAT_EXPR): Don't assume + GET_MODE_SIZE (SImode) == UNITS_PER_WORD. + (expand_builtin): Likewise. + (do_jump_by_parts_{greater,equality): Likewise. + Use operand_subword_force. + * expr.h (operand_subword): Remove declaration from here. + (validize_mem): Add missing declaration. + * final.c (final_scan_insn): If assembler code string is "#", + try to split insn. + Ignore insns with INSN_DELETED_P set. + (alter_subreg): Remove erroneous code for CONST_DOUBLE. + (output_addr_const): Integer CONST_DOUBLEs are now VOIDmode. + * fold-const.c (add_double): No longer static. + * integrate.c (copy_for_inline, copy_rtx_and_substitute): + Use validize_mem to validate force_const_mem's result. + (subst_constants, case SUBREG): Use operand_subword and + gen_lowpart_common instead of gen_lowpart and gen_highpart. + (restore_constants): Don't assume all CONST_DOUBLEs are floating. + Use validize_mem to validate force_const_mem's result. + * optabs.c (expand_binop,, expand_unop): Don't assume + GET_MODE_SIZE (SImode) == UNITS_PER_WORD. + Use operand_subword_force. + (operand_subword): Deleted from here. New version in emit-rtl.c. + * recog.c (validate_replace_rtx_1): Check for any constant, + not just CONST_INT. + (constrain_operands, case 'm', 'o'): Any constant OK if strict < 0. + (constrain_operands, case 'E'): Must have host and target word sizes + the same. + (constrain_operands, case 's', 'n'): CONST_DOUBLE can be integer. + * reload.c (find_reloads, case 'm', 'o', 'E', 's', 'n'): Likewise. + Don't call force_const_double_mem; use force_const_mem instead. + (find_reloads_toplev): Likewise. + Use gen_lowpart_common to get low part of constant. + * rtl.h (gen_highpart, force_const_double_mem): Deleted. + (gen_lowpart_common, operand_subword, operand_subword_force): + New declarations. + * varasm.c (const_double_chain): Renamed from real_constant_chain. + (immed_double_const): For integer constants, perform any needed + masking and make either CONST_INT or CONST_DOUBLE. + (force_const_double_mem): Deleted; would need a mode arg added + which would make it almost identical to force_const_mem. + * out-vax.c (split_quadword_operands): Use operand_subword instead + of gen_lowpart and gen_highpart. + + * function.c (find_replacement): New function. + (fixup_var_refs_insns): Pass pointer to listhead of (new) + fixup_replacement structures; if any entries were pseudos, copy from + memory to the pseudo. + (fixup_var_refs_1): New arg REPLACEMENTS; provide that arg in + recursive calls. + Use find_replacements to ensure we don't break any MATCH_DUPs. + +Tue Jun 4 05:07:53 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * stmt.c (pushcase, pushcase_range): Take new parameter DUPLICATE. + Use this to store existing LABEL_DECL if LABEL is a duplicate. + * c-parse.y, cplus-parse.y, objc-parse.y, stmt.c: All callers + changed. + +Mon Jun 3 17:19:40 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cplus-expr.c (decl_in_memory_p): New function. + * cplus-typeck.c (mark_addressable): Test `decl_in_memory_p' instead + of testing memory_operand, since the DECL_RTL of a decl may be a + (MEM ...) by not a valid memory address. + + * cplus-typeck.c (mark_addressable): When we decide that a static + const variable must go to memory, make sure that its rtl is + allocated from the correct obstack. + + * cplus-decl.c (grokdeclarator): Replace undocumented BREAK_C_TAGS + #define control with comments explaining why or how it is correct + for GNU C++ to break C's notions of what a tag is. + + * cplus-call.c (convert_harshness): Replace undocumented #if + AMBIGUOUS_WORKING control with a comment explaining the actions + where this control used to be. + +Mon Jun 3 15:07:47 1991 Sean Eric Fagan (sef at kithrup) + + * tm-i386.h (TRAMPOLINE_TEMPLATE): Changed a 040 to 0xe0; + this is the proper code for a jmp [%eax] instruction. + +Mon Jun 3 08:07:42 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cccp.c (initialize_builtins): Install __SIZE__TYPE__, + __PTRDIFF_TYPE__, and __WCHAR__TYPE__ as builtins. + +Sun Jun 2 18:18:19 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * flow.c (mark_set_1): Don't set LAST_MEM_SET from a MEM that has any + side-effects (such as auto-inc), not just volatile MEMs. + + * rtlanal.c (reg_referenced_p): New function. + * combine.c (try_combine): Correct test for added_sets_1 to account + for case where I1 and I2 both feed I3. + (distribute_notes): Don't interpret setting a reg as a use of the + reg; use new reg_referenced_p and simplify code. + + * flow.c (propagate_block): Ensure that LOOP_DEPTH is correct at all + insns in a basic block, otherwise reg_n_refs will be set incorrectly. + + * recog.c (validate_replace_rtx_1): Don't change mode of memory + reference that is mode-dependent. + Don't make a MEM with a larger mode than original. + + * combine.c (try_combine): Disable code to check MODES_TIEABLE_P + added May 20th and 22nd; this should not be needed now that + LIMIT_RELOAD_CLASS has been added to reload. + + * flow.c (mark_set_1): Allow for the fact that stack pushes don't have + REG_INC notes. + * local-alloc.c (optimize_reg_copy): Likewise. + Don't change lives of hard registers #ifdef SMALL_REGISTER_CLASSES. + A USE of a register must not be changed. + (validate_equiv_mem): Don't make an equivalence to volatile MEMs. + + * reorg.c (mark_set_resources): #ifdef PUSH_ROUNDING, mark SP as always + set since the insn might have a (pre_dec sp). + +Sun Jun 2 16:03:31 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * Makefile.in (libg_dir): Variable deleted. + (install-gnulib): Don't bother creating libg.a. + + * cccp.c (size_type_string, etc.): Variables deleted. + (special_symbol): Use macros SIZE_TYPE, etc., directly. + +Sat Jun 1 12:54:05 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * Let tm.h specify types for size_t, ptrdiff_t and wchar_t. + (SIZE_TYPE, PTRDIFF_TYPE, WCHAR_TYPE): New params. + * cccp.c, c-decl.c: Provide default definitions of the new params. + * cccp.c (__SIZE_TYPE__, __PTRDIFF_TYPE__, __WCHAR_TYPE__): Builtins. + (special_symbol): Implement them based on new params. + * stddef.h (size_t, ptrdiff_t, wchar_t): Declare using those builtins. + * c-tree.h (ptrdiff_type_node): Declare variable. + * c-decl.c (init_decl_processing): Use *_TYPE params + to control setting of sizetype, wchar_type_node and ptrdiff_type_node. + * c-typeck.c (pointer_diff): Take result type from ptrdiff_type_node. + + * configure (target1): Really change / to -. + +Sat Jun 1 02:49:04 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-lex.c (extract_interface_info): Now non-static. Called + whenever INPUT_FILENAME changes. + * cplus-pt.c (instantiate_class_template): Call + `extract_interface_info' when switching files. + * cplus-input.c (getch): Ditto. + + * combine.c (subst): Don't change the mode of memory access for + volatile memory. + + * tm-sparc.h (CONST_COSTS): Fix typo in computing cost of + CONST_DOUBLE for DImode integers. + +Fri May 31 16:11:57 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-lex.c (process_next_inline): Set line number and filename if + more inline data is to be processed. + (store_pending_inline): Treat FUNCTION_TYPE like METHOD_TYPE. Use + current_class_type instead of extracting it from method type; the + two should be the same, and the latter doesn't work for statics. + + * cplus-decl.c (start_decl): When constructing templates, use + original name of function rather than "mangled" name. Look for + FUNCTION_DECL, not FUNCTION_TYPE, when deciding how to push the + new decl. + (start_method): Default inlining does not apply to template + expansions. + + * cplus-pt.c (pending_template_expansions): Moved declaration to + start of file. + (tsubst): For FUNCTION_DECL, use original name of source, not + mangled name. + (instantiate_template): Local variables now non-static. Fill in + pending-inline field of new decl, rather than template-info, and + chain into either pending-inlines or pending-template-expansions. + + * cplus-typeck.c (build_x_function_call): If a template is found, + treat it as an overloaded declaration. + +Fri May 31 14:20:45 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * Makefile.in (all.cross): New target. + * configure: If cross-compiling, change `ALL' to use all.cross. + +Fri May 31 11:43:31 1991 Matthew Self (mself at next.com) + + * tm-next.h (EXTRA_SECTION_FUNCTIONS): + Add new constructor and destructor sections. + (MAX_OFILE_ALIGNMENT): Define as 2^15 for Mach-O. + (ASM_OUTPUT_ALIGN): Use .align, not .even. Allow alignments > 2. + (CPP_PREDEFINES): Added -Dm68k since some code expects this. + +Fri May 31 05:41:51 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cplus-class.c (pushclass): New argument value for MODIFY accepted. + * cplus-decl2.c (build_push_scope): Call `pushclass' with MODIFY == 3. + + * cplus-decl.c (finish_function): Set TREE_PUBLIC and TREE_EXTERNAL + bits on functions according to #pragma interface/implementation, + regardless of whether or not the function's inline. This fixes the + bug of needless code replication with -fno-inline. + +Thu May 30 17:39:53 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * expr.c (expand_expr): + Don't lose volatility of fields in COMPONENT_REF. + +Thu May 30 17:36:45 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (count_reg_usage, delete_dead_from_cse): New functions. + * toplev.c (rest_of_compilation): Call delete_dead_from_cse immediately + after the first cse pass. + + * local-alloc.c (validate_equiv_mem_from_store, validate_equiv_mem): + New functions, to find cases where a REG is equivalent to a MEM. + (optimize_reg_copy): New function. + (update_equiv_regs): Call these new functions. + Look for a register used in only one basic block being stored into + memory. + Keep track of loop depth so we can find regs used only once, but + inside a loop. + * reload1.c (reload): Use single_set when looking for an insn + that initializes a register. + If making a REG equivalent to a MEM, the insn with SET_DEST being + the register isn't always the one making the equivalence, since the + equivalence might be occurring due to a store into MEM; in that + case set reg_equiv_init to the latter insn. + +Thu May 30 14:23:01 1991 Ken Raeburn (raeburn at watch.com) + + * Pending expansions processed at end-of-file can be processed out + of order, so freeing the associated data from the obstacks is not + possible. + * cplus-tree.h (struct pending_inline): New field can_free + indicates whether to free the text after processing it. + * cplus-lex.c (do_pending_inline, process_next_inline): If + can_free flag is set, specify inline-text obstack, otherwise null + pointer. + (cons_up_default_function): Clear flag. + (reinit_parse_for_method): Set it. + (store_pending_inline): Clear it when changing obstacks. + (pending_template_obstack): Deleted. References changed to use + permanent_obstack. + + * cplus-lex.c (store_pending_inline): Set DECL_PENDING_INLINE_INFO + value after swapping obstacks, not before. + +Thu May 30 07:23:18 1991 Michael Tiemann (tiemann at cygnus.com) + + * va-sparc.h: Has to be a char * to be compatible with Sun. + i.e., we have to pass a `va_list' to vsprintf. Also, fixed + bug in passing vararg structs. + +Thu May 30 00:32:18 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * configure: Delete Makefile.tem before writing it. + + * stor-layout.c (layout_record): + Ignore PCC_BITFIELD_TYPE_MATTERS for incomplete type. + + * fixincludes (stdtypes.h): Handle wchar_t like the other types. + + * function.c (assign_parms): Don't declare args_so_far register. + +Wed May 29 15:13:05 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-tree.def (TEMPLATE_PARM_IDX): Deleted. + (TEMPLATE_TYPE_PARM): New node type, looks like a type node. + (TEMPLATE_CONST_PARM): New node type, looks like a const node. + + * cplus-tree.h (IDENTIFIER_TYPE_VALUE_PTR): Inlined under gcc. + (TYPE_IDENTIFIER_PTR): Ditto. + (DECL_NESTED_TYPENAME_PTR): Ditto. + (struct lang_type): New bitfield `use_template'. + (CLASSTYPE_USE_TEMPLATE): Accessor macro for above. + (struct lang_decl): New field `template_info'. + (DECL_TEMPLATE_INFO): Accessor macro for above. + (TEMPLATE_EXPANSION_NAME_P): Deleted. + (push_overloaded_decl_top_level): Added declaration. + (TEMPLATE_TYPE_TPARMLIST, TEMPLATE_TYPE_IDX, + TEMPLATE_TYPE_SET_INFO, TEMPLATE_CONST_TPARMLIST, + TEMPLATE_CONST_IDX, TEMPLATE_CONST_SET_INFO): New macros for + accessing fields of TEMPLATE_..._PARM nodes. + (struct pending_inline): New fields for names and values to bind + to them while processing. + (struct template_info): Definition moved here from cplus-pt.c. + (instantiate_template): Added declaration. + (instantiate_class_template): Ditto. + (processing_template_{decl,defn}): New variable declarations. + + * print-tree.c (print_node): Provide missing argument to + print_node for `bitpos' field. Display `virtual' flag, and (for + function and method types) `class' field; these are only used by + C++ that I'm aware of, but are defined in common code, so they + should be displayed here. + + * cplus-parse.y (template_def): Separate set of derivations, for + class and function templates. Template_def is a type of extdef; + extern_lang_string before template_def is not permitted. + (fn_tmpl_end): New nonterminal, anything that signals the end of + the portion of a template that we should parse. + (yyprint): Define only if YYDEBUG. Handle TYPESPEC. + (datadef): Complain at class template override declaration if that + specialization has already been produced by expansion. Template + definitions no longer belong here. + (tmpl.2): Always call instantiate_class_template; let it decide + whether or not to go through with it. + (template_instantiation): Put decl in global scope only if not + already there. + (typespec, scoped_typename): Scoped typename inside template type + should be a scoped_typename, not a typespec. However, a + template_type should be allowed as a typespec. + (structsp): Don't undo template name overload here. Deleted + derivation from template_type. + (named_class_head_sans_basetype): Don't overload template name. + (LC): Do it here. + (notype_declarator): For scoped_id derivations, don't call + build_push_scope if the scoped_id is a SCOPE_REF. + (scoped_id): Moved old typespec-from-template_type rule here. + Call resolve_scope_to_name only if template parms aren't involved. + + * cplus-pt.c (struct template_info): Definition deleted. + (templates, current_template_info): Variables deleted. + (processing_template_{decl,defn}): New variables. + (push_template_decls, pop_template_decls): Accept parmlist and + arglist as separate arguments, instead of deriving both from the + template. If class_level is non-zero, push and pop a level, + making it transparent to tags. Removed some pointless checks from + pop_template_decls that are only needed in push_template_decls, + and some assertions from both. Callers changed. + (uses_template_parms): Return non-zero iff argument refers to any + TEMPLATE_*_PARM nodes. + (tsubst): Walk tree, substituting for template parms, returning + new tree. + (type_unification): Rewritten a bit, to make it work. New + argument nsubsts is pointer to place to record number of + substitutions made when matching. + (unify): Renamed from unify1. Rewritten completely, to work. + Still may need extending for some tree node types. + (do_pending_expansions): At end-of-file, expand any templates not + yet expanded which were actually needed. Needs work to accomodate + latest specs. + (process_template_parm): Simplified slightly. Non-type parms + should be marked read-only; aggregate types are not allowed, since + equality checks don't work. + (end_template_parm_list): Moved to after process_template_parm. + Push a level, and push decls for TEMPLATE_*_PARMs. Set + processing_template_decl flag. + (end_template_decl): For non-class templates, build a + TEMPLATE_DECL and store the regular decl in its result field. + Context and other values get copied over too. Call poplevel to + get rid of the TEMPLATE_*_PARM decls, and call + dont_forget_overload to avoid losing the declaration later. Clear + processing_template_decl flag. Call get_pending_sizes, so later + function compilation doesn't try to evaluate sizes of templates. + (mangle_class_name_for_template): Convert type/non-type check from + switch to if test. Added support for ENUMERAL_TYPE, REAL_TYPE, + and POINTER_TYPE parms. + (instantiate_class_template): Renamed from old + instantiate_template. Don't expand if type size is set, or if + being-defined flag is set, or use-template flag is non-zero. If + other-template parms are used in the parm list, construct a simple + RECORD_TYPE node and return it. Catch case of template declared + but not defined before use. Renamed argument from class to + classname. Set processing_template_defn flag. + (instantiate_template): New routine; constructs new decl node + given TEMPLATE_DECL node and template arg vector. + (end_template_instantiation): Set use-template field to 2 ("did + use template"). Clear processing_template_defn flag. + (reinit_parse_for_template): Get template-info ptr from decl node. + Store template parm vector in it. + (pending_template_expansions): List of templates that may need + expanding later for function or class data definitions. + + * cplus-method.c (build_overload_value): Ensure tree code is + PARM_DECL. Handle ENUMERAL_TYPE like INTEGER_TYPE. For DImode + values, compare against integer_zero_node instead of constructing + another one. Added support for POINTER_TYPEs. If not + REAL_IS_NOT_DOUBLE, support real values as well. + (build_overload_name): Accept TEMPLATE_*_PARM nodes, but generate + a string that should cause some assembler errors. + + * cplus-ptree.c (print_lang_decl): Retrieve template-info from its + new place. + (print_lang_type): For TEMPLATE_TYPE_PARM, print its (short) info + and return. For RECORD_TYPE, print use-template and interface-* + fields. + + * cplus-search.c (push_class_decls): Don't call + push_template_decls; the bindings of template parameter names + should be associated with the template body, not with the class. + Do overload the template name, however. + (pop_class_decls): Don't call pop_template_decls. + + * cplus-call.c (build_method_call): Changed to recognize + constructor of template class. + (build_overload_call): Add in number of template substitutions as + extra cost of a candidate function. For template decls, try + unification and instantiation before evaluating cost of result. + This too is incorrect in terms of the spec, but it's a starting + point for later work. + + * cplus-class.c (finish_struct): If structure is named, undo + overload of its name as a template. + (pushclass): If prev_class_type was a template class, pop it; the + decls are handled wrong and should be re-entered. + + * cplus-decl.c (poplevel): Assert that the current level is not + global. + (push_to_top_level): Include global scope when looking for old + values, because class bindings aren't listed in any other one + place. + (push_overloaded_decl_top_level): New function; like + push_overloaded_decl, but places decl in global binding level. + (dont_forget_overload): New function; removes decl from list of + overloads to be forgotten when scope is exited. + (start_decl): If template parms are used, construct a + TEMPLATE_DECL node referencing the current decl. For function + templates, call push_overloaded_decl; for class template members, + chain them into the class template definition. + (grokdeclarator): Don't try determining size of a + TEMPLATE_CONST_PARM node. For template class-data decls, + construct a phony VAR_DECL node and return it. + + * cplus-decl2.c (grokfield): For static class data, use + build_overload_name result, instead of copying class name, since + the latter could be a human-readable template class name. (If + NEW_OVERLOAD_SCHEME is not defined, do this only if the class has + a template-derived name.) + + * cplus-lex.c (pending_template_obstack): New variable; obstack + for pending-template stuff to be saved to end-of-file. + (init_lex): Initialize it. + (default_def): New variable; used for default definition of copy + constructors and destructors. + (do_pending_inlines): Figure out whether text is in an obstack, + and which one, for calling feed_input. Push template decls if + needed, as specified in pending_inline data. Pass current + pending_inlines pointer back in PRE_PARSED_FUNCTION_DECL instead + of next. + (process_next_inline): Ditto. Pop pending inline data if needed. + (store_pending_inline): New function. Decides which obstack to + store a pending definition on, and which list to chain it into. + (reinit_parse_for_method): Call it. + (reinit_parse_for_block): If character passed in is '=', look for + a semicolon to end the block; don't require a {} block. Don't pad + to 8 bytes on USG, since we aren't feeding input via stdio any + more. Also, use newlines instead of # directives for advancing + line number only a few lines. + (cons_up_default_function): Punt padding for USG stdio, since we + aren't using it any more. Use default_def for definition. Call + store_pending_inline to save it away. + (identifier_type): For TEMPLATE_DECL, DECL_RESULT field non-null + indicates a non-type template, so don't return PTYPENAME. + (yylex): If end-of-file and input isn't redirected, call + do_pending_expansions and maybe start yylex over. Don't check + TEMPLATE_EXPANSION_NAME_P; a proper name transformation system + will eliminate conflicts. Try for SCOPED_TYPENAME with PTYPENAME + too. + +Wed May 29 11:48:34 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * cccp.c (do_include): Check that ->control_macro is non-zero. + + * gcc.c (process_command): Use `error' in last change. + +Wed May 29 11:10:12 1991 Tom Wood (wood at dg-rtp.dg.com) + + * m88k.md (movdi): Accept CONST_INT. + * out-m88k.c (output_load_const_dimode): Accept CONST_INT. + (output_call): Don't use #plt for jsr. + +Wed May 29 00:51:36 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cplus-type2.c (build_functional_cast): Give error if functional + cast is missing argument. + + * cplus-tree.h (interface_unknown): Add a declaration for this + variable. + + * cplus-type2.c (store_init_value): Normally initialized PIC data + must be laid into the text segment and then copied into the data + segment. But cecause of special things we do for ctors and dtors + (the only things that can reference such things), we can leave + vtables in initialized data space. + + * cplus-decl.c (finish_decl): Use #pragma interface knowledge if + available for processing initialized variables of type const. + +Tue May 28 18:39:20 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * sched.c ({true,anti,output}_dependence): Correct MEM_IN_STRUCT_P + code; only avoid conflict if MEM_IN_STRUCT_P ref has varying address. + + * protoize.c (stat): Remove declaration of stat; it is defined + differently (no const in arg 1) on some machines. + + * combine.c (simplify_shift_const): Avoid infinite loops by quitting + when COUNT becomes zero; delete now-unnecessary tests on COUNT. + + * flow.c (last_mem_set): New variable. + (propagate_block): Initialize it. + Show calls can change memory. + (insn_dead_p): Remove unneeded arg STRICT_LOW_OK; don't treat + STRICT_LOW_PART differently than ZERO_EXTRACT. + All callers changed. + If insn stores into the same, nonvolatile, MEM as recorded in + last_mem_set, it is dead. + (mark_set_1): If writing into register mentioned in last_mem_set or + writing into memory, clear last_mem_set. + Record last MEM written. + (find_auto_inc): New function, from mark_used_regs. + Add support for pre-increment and pre-decrement. + (mark_used_regs, case MEM): Clear last_mem_set. + Call find_auto_inc; move code to there. + (mark_used_regs, case SET): Don't call recursively on MEM if it is + SET_DEST, instead call find_auto_inc ourselves. + +Tue May 28 17:29:52 1991 Micheal Tiemann (tiemann at wookumz.gnu.ai.mit.edu) + + * gnulib1.c (__fixsfsi, __cmpsf2, __extendsfdf2): Add declarations + for intify. + + * gcc.c (default_compilers): Accept `.cxx' as a C++ extension. + +Tue May 28 17:05:28 1991 Tom Wood (wood at dg-rtp.dg.com) + + * m88k.md (movstrsi): Pass original MEM expressions. + * out-m88k.c (expand_block_move, block_move_{sequence,no_loop,loop}): + Use original MEM expressions to set RTX_UNCHANGING_P, MEM_VOLATILE_P, + and MEM_IN_STRUCT_P. + + * out-m88k.c (emit_bcnd): Use bxx when optimizing so jump_optimize + will work on more cases. Change this back when jump_optimize uses + get_condition to find the values being compared. + + * m88k.md: Don't use operand0 or operand1. + +Tue May 28 16:00:56 1991 Micheal Tiemann (tiemann at wookumz.gnu.ai.mit.edu) + + * emit-rtl.c (try_split): Make sure `after' exists before checking + to see if it is a BARRIER. + +Tue May 28 15:08:44 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * gcc.c (process_command): Warn if -x follows last input file. + + * cccp.c: Don't include file twice if a #ifndef would make it a no-op. + (struct file_name_list): New field, control_macro. + Initialize it where these structures are created. + (struct if_stack): Likewise. + (do_include): If file already known, check its control macro if any. + Don't include the file if the macro is now defined. + (do_xifdef): Detect case of successful #ifndef at start of file. + (condition_skip): Accept macro name as new arg. Record in if_stack. + (do_endif): Detect being effectively at end of file. + (record_control_macro): New function. Called from do_endif. + + * calls.c (store_one_arg): Set used after calling push_rounding. + + * sparc.md (floating move peepholes): Allow `r' for operand 2. + + * arm.md, tm-arm.h, out-arm.c, xm-arm.h: New files. + * configure (arm): New alternative. + +Tue May 28 11:53:21 1991 Michael Meissner (meissner at osf.org) + + * tm-decstatn.h (CPP_PREDEFINES): Add Ultrix 4.2 support. + + * tm-mips.h (cmp_type, branch_cmp, branch_type): Global variables + and type to record what type of comparison is being done. + (mips_print_operand_punct): New array to specify whether a + character is valid for print_operand as punctuation. + (set_nomacro, set_noat, set_noreorder): New variables to record + whether a .set nomacro, .set noat, or .set noreorder has been + done. + (dslots_{filled,total}_{load,jump}): New global variables to + remember how many delay slots exist and are filled for the -mstats + option. + (CC1_SPEC): Combine %{O:...} %{O*:...} cases. For -G32, pass -G + 32. Add dummy pattern for -save-temps to avoid error message. + (DBX_DEBUGGING_INFO): Define this all the time. + (SDB_ALLOW_FORWARD_REFERENCES): Define this for MIPS ECOFF support. + (SDB_ALLOW_UNKNOWN_REFERENCES): Define this for MIPS ECOFF support. + (TARGET_SWITCHES): Add -mstats to print interesting statistics. + Add -mmemcpy to force memcpy to be called. Add -mdebug[fghij]. + Add -mno- version of switches. + (DATA_ALIGNMENT): Align all char/short arrays/unions/structures, + rather than just char arrays. + (BYTE_LOADS_ZERO_EXTEND): Define this. + (CONST_OK_FOR_LETTER_P): 'N' returns true if power of 2. + (EXTRA_CONSTRAINT): Redefine 'Q' to be 1 word memory references, + 'R' to be multiword memory references. + (struct frame_info): Add initialized field. + (current_frame_info): New global structure to hold frame info. + (INITIAL_FRAME_POINTER_OFFSET): Use current_frame_info. + (INIT_CUMULATIVE_ARGS): Pass LIBNAME to init_cumulative_args. + (DELAY_SLOTS_FOR_EPILOGUE): Define this to fill j $r31 delay slot. + (ELIGIBLE_FOR_EPILOGUE_DELAY): Ditto. + (ENCODE_SEGMENT_INFO): Don't flag references to 0-sized arrays as + being in the small data segment. + (CONST_COSTS): Reword to be more accurate. + (RTX_COSTS): Define this. + (ADDRESS_COST): Define this. + (CLASS_CMP_OP, CLASS_EQUALITY_OP, CLASS_UNS_CMP_OP): New bits for + rtx_classify to classify various comparison operators. + (FINAL_PRESCAN_INSN): Define this to collect info for -mstats. + (NOTICE_UPDATE_CC): Only do CC_STATUS_INIT if the insn is a + comparison. + (EXTRA_CC_MODES): Define new modes CC_EQmode, CC_FPmode, CC_0mode. + (EXTRA_CC_NAMES): Define this. + (SELECT_CC_MODE): Define this. + (PRINT_OPERAND_PUNCT_VALID_P): Redefine this to index into + mips_print_operand_punct. + (DBR_OUTPUT_SEQEND): Reset .set reorder, .set macro as appropriate. + + * out-mips.c (branch_cmp, branch_type): New Global variables + and type to record what type of comparison is being done. + (mips_print_operand_punct): New array to specify whether a + character is valid for print_operand as punctuation. + (set_nomacro, set_noat, set_noreorder): New variables to record + whether a .set nomacro, .set noat, or .set noreorder has been + done. + (dslots_{filled,total}_{load,jump}): New global variables to + remember how many delay slots exist and are filled for the -mstats + option. + (reg_or_0_operand): Rewrite to add support for CONST_DOUBLE. + (mips_const_double_ok): Allow normal FP constants (not Infinity, + Nan, etc) to be used as operands when using the MIPS assembler. + (simple_memory_operand): Combine GP memory references from + gp_memory_operand. Delete gp_memory_operand. + (equality_op): Return true if EQ or NE. + (cmp_op): Return true if comparison operator. + (uns_cmp_op): Return true if unsigned comparison. + (mips_move_1word): New name for mips_move_instructions. Also, loads + of HImode/QImode use unsigned loads, rather than signed loads, so + that BYTE_LOADS_ZERO_EXTEND can be defined. Use %z to get name of + $0, instead of hardwiring it. Explicitly use lui where appropriate. + (mips_move_2words): New name for mips_move_2words_instructions. Use + %z to get name of $0, instead of hardwiring it. + (mips_address_cost): New function to define ADDRESS_COST macro. + (gen_conditional_branch): New function to generate all of the tests + and branches. + (block_move_sequence): New function to generate straight line code + for block moves. + (block_move_call): New function to set up a call to memcpy/bcopy as + appropriate for block moves. + (expand_block_move): New function which is called from the movstrsi + define_expand, to set up block moves. At present, unless -mmemcpy + is used, moves of less than 32 bytes, get straight line code, all + others get a call. + (init_cumulative_args): Take libname as third argument. + (function_arg_partial_nregs): Fix bug, to not return a negative + number when passing small structs in registers. + (compare_collect, compare_restore): Remove these functions, since + they are no longer called. + (override_options): Initialize mips_rtx_classify for all of the + comparison operator bits. Initialize mips_print_operand_punct to + return TRUE for each of the valid punctuation characters used in + print_operand. + (print_operand): %X now prints 32 bit ints in hex format. %z now + prints $0 if the operand is the constant integer 0. %(, %) now turn + on/off both .set noreorder/.set nomacro. %<, %> turns on/off .set + nomacro. %* turns on both .set noreorder and .set nomacro if + filling delay slots. %! turns on .set nomacro if filling delay + slots. + (compute_frame_size, save_restore, function_prologue, + function_epilogue): Change the calling sequence of + compute_frame_size to save everything in a global structure, which + has an initialized field to indicate that compute_frame_size needs + to be called. + (function_prologue): INIT_CUMULATIVE_ARGS now takes 3 args. + (function_epilogue): If current_function_epilogue_delay_list is + non-null, use that to fill the final delay slot. Also, make sure + the various asm .set's are reset properly. Write interesting + statistics out to stderr if -mstats. + (mips_epilogue_delay_slots): New function to return # of delay slots + the epilogue needs. + (null_epilogue): Return true if the function has a null epilogue, + which allows the optimizer to omit jumps to the final j $31 if no + stack was created. + + * mips.md (type attribute): Redo how the type attributes work, and + change some names. + (mode attribute): New attribute to describe the insn's result mode. + (length attribute): New attribute to give insn length in words. + (dslot attribute): New attribute to return whether an insn needs a + delay slot. + (define_delay): Use dslot and length attributes to determine if a + delay slot is needed. + (define_function_unit): Define all of the function units now. + (all patterns): Provide new attribute definitions. + (all memory reference patterns): modify alternatives to use 'Q' for + 1 word instructions, 'R' for multiword instructions. + (unnamed patterns): Provide names for all patterns, so that -dp will + pinpoint exactly which pattern is used. + (*divsi3, *divmodsi4, *modsi3): If optimizing and not -mdebugc, use + the *divmodsi4 patterns, so that the opimizer will only use 1 divide + if doing a = b / c; d = b % c; This replaces the peepholes, which + previously were used for this. If not optimizing, use the normal + div/mod patterns. + (zero_extendqihi2, extendqihi2): Allow zero/sign extending from + memory. + (fixuns_trunc{df,sf}si2): Use generator patterns to generate + appropriate branches. + (movsi_ulw, movsi_usw): New patterns to generate the appropriate + unaligned load/store for use in the block move expansion. + (mov*): Provide all possible combinations of moves. + (movstrsi): New pattern to generate block moves. + (negsi2): Change to a define_expand, which uses minus. + (one_cmpsli2): Change to a define_expand, which use the nor pattern. + (cmp*, b*): Redo comparison/branch completely to save things in + global variables, call the common C code to expand the branch, and + provide match_operators to do the actual branch. + (s*): Provide for the ability to set a register with an integer + comparison, without using a branch. + + * make-decrose (AUX_OUTPUT2): Delete macro, since aux-output.c is + always compiled separately now. + (LANGUAGES): Suppress G++, Objc temporarily. + (cse.o): Rebuild cse if the config files change, to get new cost + functions, no longer rebuild calls/function since the FUNCTION_ARG + macros just call functions in out-mips.c. + (SRCS): Change $(AUX_OUTPUT2_SRC) to aux-output.c. + + * make-mips (AUX_OUTPUT2): Delete macro, since aux-output.c is + always compiler separately now. + (CONFIG2_H): Add rules to rebuild selected modules when the + tm-mips.h file changes. + (mips-tfile): Rules to build mips-tfile. + (mips-tdump): Rules to build mips-tdump. + (LANGUAGES): Suppress G++, Objc temporarily, build mips-tfile. + + * mips-tfile.c (whole file): New file to put the MIPS specific debug + information into the object file, after the assembler has been run. + This is needed because the MIPS assembler provides no method of + setting up the debug information for local variables. This is + enabled by the make-mips Makefile modifier. + + * mips-tdump.c (whole file): New file to dump the contents of the + MIPS ECOFF symbol table in a symbolic format. This is not currently + built by default, but make-mips contains rules to build it. + + * tm-decrose.h (MD_EXEC_PREFIX): Change to use the test prefix + /usr/ccs/gcc-2.00/gcc- instead of the release prefix /usr/ccs/gcc. + (WCHAR_TYPE_SIZE): Define as 16. + (WCHAR_UNSIGNED): Define as 1. + (DBX_DEBUGGING_INFO): Define moved to tm-mips.h. + + +Tue May 28 06:26:44 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * expmed.c (store_bit_field, extract_bit_field): If -fforce-mem + specified, copy OP0 into register (and back again, for store). + + * sched.c (memrefs_conflict_p, {true,anti,output}_dependence): Add + missing parens. + + * reload.c (find_reloads): Turn usage of reg_preferred_class back on + now that the code has been refined. + +Mon May 27 12:41:14 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-typeck.c (build_binary_op_nodefault): Set converted for shifts, + so op1 is not converted to the result type. + Clean up some warning messages. + + * expr.c (expand_expr): Use temp stack slot for BLKmode SAVE_EXPR. + + * Makefile.in (alloca.o): Use new vars ALLOCA_FLAGS and ALLOCA_FINISH. + +Mon May 27 05:42:20 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * sched.c ({read,true,anti,output}_dependence): Remove unused arg INSN. + All callers changed. + + * combine.c (subst, case PLUS): Fix typo in (plus (plus X C) Y) case. + (subst, case MULT): Distribute MULT over PLUS to try to simplify it. + +Mon May 27 05:15:16 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * tm-sparc.h (GO_IF_LEGITIMATE_ADDRESS): Don't accept a SYMBOL_REF + sum if FLAG_PIC is not 1. This forces the -fPIC to take effect, + even when the optimizer knows how to stitch together HIGH and LO_SUM + combinations. + (PRINT_OPERAND): Move body to out-sparc.c. + * out-sparc.c (print_operand): New function, implementing actions of + old PRINT_OPERAND macro. Comments written for all cases. + (reg_unused_after): Don't do anything special with JUMP_INSNs. Only + do something special with CALL_INSN if REGNO is a call-used reg. + + * cplus-type2.c (store_init_value): Back out 23 Feb change, which + was completely backward. + + * dbxout.c, cplus-dbxout.c (dbxout_parms): Also test that TREE_TYPE + (PARMS) is not ERROR_MARK_NODE. + + * cplus-init.c (build_up_reference): Check FLAGS parameter to see if + we can accept building a reference to a constructor-generated + temporary. + (various places): Change calls to `build_up_reference' that used to + use an explicit `1' to use LOOKUP_PROTECT instead. + (build_offset_ref): Use IDENTIFIER_TYPE_VALUE macro to the the type + associated with CNAME. + + * cplus-class.c (build_vbase_path): Fix 11 May change by only + changing TREE_TYPE (EXPR) if NULL_EXPR. We might build different + vbase paths for the same expr in multiple inheritance + initialization. + + * Makefile.in: Change sed script so it matches '^# ' instead of just + '^#'. This allows processing of md files with #if/#endif controls + in their C function bodies. + + * cplus-tree.c (build_cplus_new): Set TREE_SIDE_EFFECTS on RVAL. + + * stmt.c (warn_if_unused_value): Don't warn about EXIT_EXPRs. + (expand_decl_cleanup): Add missing type declarations for parameters. + + * cplus-call.c, cplus-class.c, cplus-dbxout.c, cplus-edsel.c: Include + stdio.h after cplus-tree.h since the latter references printf. + * cplus-search.c, cplus-xref.c: Likewise. + * cplus-class.c (prev_class_type): Not static; defined in cplus-tree.h. + * cplus-decl.c (builtin_function, auto_function): Don't put & in + front of function name. + * cplus-typeck.c (comptypes,comp_target_types): Likewise. + * cplus-search.c (report_ambiguous_mi_virtuals): Likewise, for arrays. + +Sun May 26 22:47:35 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cplus-decl.c (make_temporary_for_reference): New function. Split + out code from `grok_reference_init' so we could call it in two + places: where it was called before, and when initializing a + reference through a constructor for a temporary. + (grokdeclarator): Give error message instead of aborting if user + gave method qualifiers for function decl. + (start_function): Switch to temporary obstack before computing + destructor and constructor labels, and before building the + function's RESULT_DECL. + + * cplus-decl.c (store_parm_decls): Make a cleanup that controls the + action of the garbage collector. This ensures that the call to + __gc_pop doesn't get skipped in the function issues a return stmt. + * cplus-gc.c (expand_gc_prologue_and_epilogue): Work with new + cleanup model. + + * cplus-gc.c (build_i_desc): Figure out whether the i_desc should + constitute a defn of its type or not. + + * cplus-typeck.c (c_expand_return): Look through TARGET_EXPR as well + as NEW_EXPR for returning addresses of local variables. + + * reload.c (find_reloads): Intialized `goal_alternative_swapped' + where `swapped' is initialized to zero. + +Sun May 26 21:29:26 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * recog.c (const_double_operand): Fix typo. + * reload1.c (choose_reload_regs): Fix typo--swap #endif with }. + + * loop.c (init_loop): Multiply copy_cost by 2. + (general_induction_var): Use rtx_cost directly. + (expr_benefit): Function deleted. + + * m68k.md (andsi3): Generate bclr if appropriate. + + * cccp.c (do_undef): Just a warning, if deleting something unusual. + +Sun May 26 18:51:33 1991 Jim Wilson (wilson at sphagnum.cygnus.com) + + * expr.c (force_operand): When calling recursively, use + a temporary to force evaluation of calls. The C language + allows `f (g (x), g (y))' to be evaluated in different orders + on different hosts, which could lead to different code + generation for different hosts. + + * recog.c (const_double_operand): New function for recognizing + CONST_DOUBLE rtx's. + + * expmed.c (expand_mult_add): Add new parameter TARGET which is a + suggestion of where to store the result; pass it to expand_expr. + * loop.c (emit_iv_add_mult): Pass REG to expand_mult_add call as + target for the result. + + * gmicro.md, old-sparc.md, pyr.md: Delete obsolete UMULT patterns. + + * expmed.c (expand_mult): Convert DImode constants to a CONST_INT + if possible, so that multiplies by these can be optimized by the + existing code. + +Sun May 26 00:59:42 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * gcc.c (process_command): -save-temps is always valid. + + * varasm.c (output_constructor): Don't crash if val == 0. + + * cse.c (refers_to_mem_p): Handle constant addresses. + + * cccp.c (main): Don't store thru last_include if null. + +Sat May 25 06:33:19 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reload.c (find_reloads): Don't assume we have at least two operands + when we check for a simple copy. + + * sched.c (update_reg_known_value): Deleted. + (init_alias_analysis): If have REG_EQUIV note, can always use NOTE's + value irrespective of number of sets. + Take known value from note, not SET_SRC. + (memrefs_conflict_p): Remove gotos. + ASHIFT can't occur in an address. + (true_dependence, anti_dependence, output_dependence): Take into + account the fact that a MEM_IN_STRUCT_P reference cannot conflict + with a non-MEM_IN_STRUCT_P reference at a fixed address. + +Fri May 24 11:34:39 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * Makefile.in (cplus-tab.c): Put back -d option. + +Fri May 24 06:46:07 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * rtl.c (rtx_alloc): Ensure we keep the obstack aligned. + +Fri May 24 00:17:13 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * reload1.c (choose_reload_regs): Try with inheritance, then without. + #if 0 the code to avoid inheritance in certain cases. + +Fri May 24 00:13:40 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * out-i386.c (split_di): Check for CONST_DOUBLE before CONSTANT_P. + + * tm-i386.h (LIMIT_RELOAD_CLASS): new macro. + (PREFERRED_RELOAD_CLASS): a CONST_DOUBLE can appear in narrower + classes than GENERAL_REGS. + + * reload.c (push_reload): Limit reload class even if the SUBREG has + already been stripped. + +Thu May 23 11:08:21 1991 Jim Wilson (wilson at sphagnum.cygnus.com) + + * sched.c (schedule_insns): Don't schedule a block if the only insn is + a CODE_LABEL. + +Thu May 23 07:54:57 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reload1.c (choose_reload_regs): Process reload in first pass if + a subsequent reload requires fewer registers. + Change criteria for processing from being a strict superset to + having an intersecting, non-equal class. + Ignore optional and turned-off reloads in loop to see what is forced + to be allocated in first pass. + + * toplev.c (compile_file): Fix typo in length of string to allocate + for sched2 dump's name. + + * jump.c (find_cross_jump): Don't crash if single_set returns 0. + + * recog.c (general_operand): A SUBREG of a constant is never valid. + + * local-alloc.c (qty_compare, qty_compare_1): Make priority function + the same as in global-alloc: quantities with shorter lives are + allocated first. This can speed up some code by a factor of three. + +Wed May 22 17:40:49 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reload1.c (emit_reload_insns): Fix some minor bugs in making + REG_DEAD notes and recording insn that does store; code sometimes + assumed that each call to gen_move_insn produced at most one insn. + +Wed May 22 16:51:53 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * reload.c (push_reload): Support LIMIT_RELOAD_CLASS. + +Wed May 22 14:14:51 1991 Micheal Tiemann (tiemann at wookumz.gnu.ai.mit.edu) + + * jump.c (jump_optimize): Update the three simplifications that + start with the "if (...) x = 1;" case. Add comments explaining how + to make them more machine independent, and comments explaining how + they might fail in the future. Ifdef out the second case, and add + code explaining why it does not work. + + * rtl.h: Put definition of FUNCTION_FLAGS_USES_CONST_POOL here. + * integrate.c: Remove definition of it here. + + * integrate.h: New fields in struct inline_remap, min_insnno and + max_insnno, which indicate the range of insns covered by insn_map. + * integrate.c (expand_inline_function): Set min_insnno and max_insnno. + +Wed May 22 12:31:53 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * tm-vaxv.h (ASM_OUTPUT_LOCAL): Use data_section. + + * protoize.c (fancy_abort): Define it. + * objc-parse.y (yyprint, set_yydebug): New functions. + + * tree.h (gettags, get_permanent_types, get_temporary_types): + Declare them. + + * Makefile.in (protoize.o, unprotoize.o): + Use the standard flags and include dirs. Don't use -Wall. + * protoize.c (abort): Declaration deleted. + + * cccp.c (main): Ensure `next' field in directory list is initialized. + +Wed May 22 09:27:49 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * expmed.c (synth_mult): Return cost of -1 if shift is too + expensive. + +Wed May 22 07:53:52 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * out-sparc.c (output_move_double): More SImode->Pmode fixes. + +Wed May 22 02:43:02 1991 Micheal Tiemann (tiemann at wookumz.gnu.ai.mit.edu) + + * Makefile.in, emit-rtl.c, explow.c, final.c, global-alloc.c, + gnulib2.c, hard-reg-set.h, regclass.c, reload1.c, cccp.c: Fix typos + and indentation. + +Wed May 22 00:14:37 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * combine.c (try_combine): Add to last change; handle subreg + in src as well as in dest of i3. + +Tue May 21 22:32:08 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * m68k.md (dbra): Rewrite pattern so it reflects simplifications that + combine will make. + +Tue May 21 10:44:05 1991 Jim Wilson (wilson at sphagnum.cygnus.com) + + * loop.c (strength_reduce): When a loop-vtop note is encountered, + reset `not_every_iteration'. + +Tue May 21 00:17:31 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-decl.c (init_decl_processing): Always use long type for size_t. + + * varasm.c (assemble_variable): Use ASM_DECLARE_OBJECT_NAME. + + * protoize.c: Include config.h. + (chmod, kill): Declarations deleted. + They aren't needed, and can conflict with system headers. + (wait): BSD declaration deleted. + (save_def_or_dec): Add missing fprintf arg. + + * tm-next.h (EXTRA_FORMAT_FUNCTIONS): Fix typo. + + * protoize.c: Use USG and VMS as most files do. + Don't expect BSD to be necessary defined outside this file. + Define getwd using getcwd, not vice-versa, to be like dbxout.c. + * cccp.c, SYSCALLS.c: Use USG and VMS as most files do. + Don't expect BSD to be necessary defined outside this file. + +Mon May 20 16:54:17 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * tm-i386.h, tm-att386.h, tm-bsd386.h, tm-sun386.h (ASM_BYTE_OP): + Renamed from ASM_BYTE. + * varasm.c (ASM_BYTE_OP): Likewise. + + * c-decl.c, cplus-class.c (finish_struct): Typo: + Had PCC_BIT_FIELD_MATTERS which is now PCC_BITFIELD_TYPE_MATTERS. + + * gcc.c (handle_braces): Don't deref input_suffix if null. + +Mon May 20 15:19:27 1991 Michael I Bushnell (mib at geech.gnu.ai.mit.edu) + + * cccp.c (pcfinclude): STRINGDEF struct is now longword aligned. + +Mon May 20 14:26:18 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * sparc.md: Remove all arithmetic, logical, and shift patterns for + sub-SImode operands. Also fix some DImode patterns. + + * out-sparc.c (emit_move_sequence): Simplified considerably. + + * rtl.c (rtx_alloc): Inline-code an optimized obstack_alloc. + + * cplus-lex.c (make_{pointer,reference}_declaration): Call + `build_parse_node' instead of `build1' so memory can be freed. + + * cplus-parse.y: Remove unneeded epsilon rules to produce an average + 15% reduction in the number of reductions performed. + + * cplus-parse.y (RETURN_INIT): Use new interface to speed up + grammar. + * cplus-decl.c (store_return_init): Use new interface. + +Mon May 20 11:16:34 1991 Jim Wilson (wilson at sphagnum.cygnus.com) + + * sched.c (schedule_block): A register which dies in a CALL_INSN + does not cross calls. A single insn block must be scheduled, to + ensure that register lifetime info is corrected updated. + +Mon May 20 06:50:37 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (try_combine): Don't combine when I1 and I2 both feed + into I3 and I1 uses the register set in I2. + + * reload.c (find_reloads): Prefer pseudos over other things we may + reload. + +Mon May 20 02:02:15 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * combine.c (try_combine): Test MODES_TIEABLE_P when i3 src is subreg. + + * m68k.md (trunc*): Don't set cc if use wider insn. + +Sun May 19 14:45:46 1991 Ron Guilmette (rfg at ncd.com) + + * Makefile.in (clean): Delete stage1...stage4. + (realclean): Delete cexp.output. + + * fixincludes: Handle BSD43__IO* and BSD43_CTRL like IO* and CTRL. + +Sun May 19 15:00:05 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * reload1.c (count_possible_groups): New function. + (reload): Call it twice. This checks for possible groups + after maybe spilling some single regs. + + * configure (magnum, m3230): Aliases for mips/mips. + + * fixincludes (machine/cpu.h): + Create in proper dir. Fix mips/cpu.h too. + + * reload.c (find_reloads): Turn off usage of reg_preferred_class. + +Sun May 19 09:51:24 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * flow.c (mark_used_regs): Continue putting REG_DEAD notes on + fixed registers. + + * regclass.c (reg_class_record): Don't count classes in which objects + won't fit. + + * reload.c (find_reloads): Pre-compute preferred classes for each + operand; if operand 1 is copied to operand 0, merge the classes. + REJECT is now only 1/3 as costly as LOSERS; ? adds 3 to REJECT so + that it's semantics don't change. + + * expr.c (compare_from_rtx): Do EQ and NE comparisons unsigned since + they are usually cheaper and will cse with comparisons against zero + which are already unsigned. + + * reload1.c (choose_reload_regs): Don't try to access reload_out + for disabled reload (reload_strict_low may not have been cleared). + + * reload1.c (choose_reload_regs): Don't let optional reloads inherit + spill regs until all non-optional reloads have been allocated spill + regs. + We can use find_equiv_reg even if must_reuse, we just can't get a + spill reg that way. + + * expr.c (do_tablejump): When using LABEL_REF in arithmetic, make it + in Pmode instead of VOIDmode. + + * function.c (fixup_var_refs_1): Don't try to make paradoxical + memory SUBREGs; instead keep SUBREG_REG a pseudo and copy between + memory and the pseudo. + (fixup_memory_subreg): Abort if we try making paradoxical SUBREGs. + + * reorg.c (redundant_insn_p): Insns we pass may reference resources + set by INSN; it is sufficient that they not set resources in INSN. + +Sun May 19 08:06:17 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * tm-sparc.h (STRUCT_VALUE): Change SImode to Pmode here, and in + other places. + (FIRST_PARM_OFFSET): Change 4 to UNITS_PER_WORD here, and in other + places. + (ROUND_ADVANCE): New macro to compute how far to advance the arg + pointer for a give parameter. + (FUNCTION_ARG): Use PARM_BOUNDARY instead of 32. + (EXTRA_CONSTRAINT): Don't depend on `reload_completed'. + * sparc.md (various places): Change many DImode predicates from + `general_operand' to `register_operand'. + + * jump.c (find_cross_jump): Fixed 18 May change to use + `validate_change' to make sure we get valid, initialized values + regardless of which path we choose. + +Sat May 18 15:07:29 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * cccp.c: Rename FATAL_EXIT_CODE to FAILURE_EXIT_CODE. + + * gnulib1.c: Rename SFVALUE to FLOAT_VALUE_TYPE. + (union flt_or_value): New type. + (*): Use that instead of flt_or_int in most places. + Delete some variables `intify' that aren't needed. + * tm-i386.h: Rename SFVALUE to FLOAT_VALUE_TYPE. + + * stor-layout.c (layout_record): BITFIELD_NBYTES_LIMITED now 1 or 0. + + * rtl.h (struct rtx_def): Drop SHORT_ENUM_BUG; keep ONLY_INT_FIELDS. + + * loop.c (add_cost, copy_cost): + Variables replace old macros *_BENEFIT and COPY_PENALTY. + (init_loop): New function to set the variables. + (expr_benefit): Use rtx_cost. + * toplev.c (compile_file): Call init_loop. + * cse.c (rtx_cost): Treat mult by 2**n as a shift by default. + + * toplev.c (output_file_directive): + Typo in ASM_OUTPUT_MAIN_SOURCE_FILENAME. + + * gnulib2.c [L_trampoline]: Rename function to __trampoline. + Always compile it even if empty. Make it global. + +Sat May 18 14:11:37 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reload.c (find_reloads): Remove unnecessary test when increasing + cost of alternative due to non-preferred register class. + + * reload1.c (choose_reload_regs): Fix typo. + + * tm-rs6000.h: Add hard registers for the 8 CR fields; add classes + CR0_REGS and CR_REGS. + Don't use CC0; add CCUNSmode and CCFPmode. + (FIXED_REGISTERS): r31 (fp) is no longer fixed. + (REG_CLASS_FROM_LETTER): Remove 'd' for GENERAL_REGS; 'r' already + means this. + (CONST_DOUBLE_OK_FOR_LETTER): If we can move a constant in two insns + for DF or one insn for SF, let it match 'G'. + (SECONDARY_RELOAD_CLASS): Define this new macro. + (FUNCTION_ARG): Fix typo in testing nargs_prototype. + (LEGITIMATE_CONSTANT_P): Always return 1. + (FIXUNS_TRUNC_LIKE_FIX_TRUNC): Do not define. + * rs6000.md: Don't use CC0; instead use a pseudo which will be assigned + to CR_REGS or CR0_REGS. Make variants of arithmetic insns that + set only the condition code and that set both the condition code + and a normal result. + Delete "cc" attribute and add "type" attribute. + Define delays for cc-setting insns and for loads. + Replace `d' constraint with `r'. + Delete patterns for HImode and QImode arithmetic operations. + Handle putting "easy" DFmode or SFmode constant into a register. + Rework compare and branches; add scc insns. + Fix up decrement-and-branch insns, but they still won't be used yet. + (call insns): Use pseudo for "lr" in indirect calls. + (movdf, movsf): Explictly handle need to use memory to copy between + general and FP registers. + * out-rs6000.c (next_insn_tests_no_unsigned, unsigned_comparisons_p): + Deleted. + (update_cc): Likewise. + (gen_reg_operand): Tighen up a bit. + (cc_reg_operand, reg_or_u_short_operand, easy_fp_constant): New fns. + (fp_reg_or_mem_operand, mem_or_easy_const_operand): Likewise. + (call_operand): Accept pseudo register. + (branch_comparison_operator, scc_comparison_operator): New functions. + (secondary_reload_class, ccr_bit, must_save_cr): Likewise. + (print_operand, case 'w', 'u'): Support CONST_DOUBLE. + (print_operand, cases 'W', 'f', 'F', 'R', 't', 'T', 'C', 'D'): + New cases. + (print_operand, cases 'j' and 'J'): Now use for bit number in CCR. + (output_{pro,epi}logue): If we call function to save/restore fpr's, + we need to save/restore LR. + Save CR if we modify the call-saved fields. + + * romp.md: Delete HImode and QImode arithmetic operations. + (swapxi): Delete; obsolete and never used. + + * tm-a29k.h (TARGET_SWITCHES): Change -mnodw to -mndw. + Add -m{no-,}reuse-arg-regs. + (SECONDARY_RELOAD_CLASS): Provide a definition for this new macro. + * a29k.md: Delete all HImode and QImode arithmetic operations. + * out-a29k.c (secondary_reload_class): New function. + (incoming_reg): Look at TARGET_NO_REUSE_ARGS. + + * reload1.c (eliminate_regs): Don't remove a PLUS unless inside an + address since it would need to change INSN_CODE and can't do it here. + + * reorg.c (uid_to_ruid, max_uid): New vars. + (mostly_true_jump): Refine prediction slightly. + Use uid_to_ruid map to accurately see if branches are backward. + (relax_delay_slots): Pass condition to mostly_true_jump. + (dbr_schedule): Allocate and build uid_to_ruid map. + +Sat May 18 12:54:45 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * cse.c (insert): "Unchanging" pseudos count as constant. + + * tree.c (make_node): Rewrite end as a switch. + +Sat May 18 03:51:06 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cse.c (FIXED_BASE_PLUS_P): Since this is used when called from + `expand_inline_function', also catch the case where the base + register is VIRTUAL_STACK_VARS_RTX. + (simplify_binary_operation): In EQ and NE case, convert a COMPARE + operand to something we can optimize. + (refers_to_mem_p): Handle the case when `base' is a LO_SUM. + * integrate.c (FIXED_BASE_PLUS_P): Define this to recognize offsets + from the various virtual registers. + (expand_inline_function): Expand exprs using EXPAND_SUM so as to get + stack frame addresses instead of pseudos. This yields much better + cse (at little cost) for GNU C++. Also, test FIXED_BASE_PLUS_P as + an alternative to CONSTANT_P to record a known register value. + * jump.c (find_cross_jump): If we are processing a cross jump and + the insns fail to match, try looking for a REG_EQUAL note that makes + them equivalent insns. If found, keep going. This is important for + merging cleanup codes when one cleanup path gets frame address in a + register when the other path gets the frame address explicitly. + + * cplus-init.c (build_delete): Fixed residual use of 1-based + indexing to use 0-based indexing instead. + + * cplus-decl2.c (grokclassfn): Fix raeburn's May 12 change so that + destructors still have the same name. + + * cplus-decl.c (decls_match): Remove dependence on MERGED. + + * cplus-class.c (build_vbase_path): Fixed bug in computing offsets + for exprs which are FIXED_TYPE_P. + (build_vfn_ref): Change initializer for REF from 0 to NULL_TREE. + + * cplus-decl.c (maybe_build_cleanup): Add LOOKUP_NONVIRTUAL to flags + argument in call to `build_delete' if DECL does not use virtual + baseclasses. If it does, we go through a function call to save + space, unless FLAG_EXPENSIVEO_OPTIMIZATIONS is nonzero. ??Better + approach is to know, in expand_cleanups, to clear `flag_no_inline' + during the cleanup's expansion. + + * cplus-*.c (various places): Add LOOKUP_DESTRUCTOR to all places + where we know we are calling a destructor for a non-null object. + + * stmt.c (fixup_gotos): Run destructors on cleanups that come + from the block being exited, in addition to any inner blocks + for which LABEL is now defined. + (expand_return): Take care of destructors that occur in the + current binding level. + (fixup_cleanups): If we emitted no insns, don't change *BEFORE_JUMP. + + * rtlanal.c: Define `target_flags' here... + * toplev.c: ...not here. This enables us to link gen* programs + which might, through rtlanal.o, pull in references to `target_flags' + that are never used. + + * function.c: Add declaration for `current_function_uses_const_pool'. + * expr.h: Add extern declaration for that variable. + * function.h (struct function): Add a slot named + `uses_const_pool' for `current_function_uses_const_pool'. + * function.c ({push,pop}_function_context): save and restore the + value of `current_function_uses_const_pool'. + * rtl.h (FUNCTION_FLAGS_USES_CONST_POOL): Defined to be 0200. + * integrate.c (initialize_for_inline): + FUNCTION_FLAGS_USES_CONST_POOL now contributes to the value of + `function_flags'. + (output_inline_function): Restore `current_function_uses_const_pool' + from `function_flags'. + (save_for_inline_copying): Only call `save_constants' if + `current_function_uses_const_pool' is nonzero. + (save_for_inline_nocopy): Ditto. + (save_constants): Tweaked to perform its treewalk faster. Notably, + it no longer accepts ptrs to NULL rtl. All callers changed. + * varasm.c (force_const_mem): Set `current_function_uses_const_pool' + if we create a constant pool reference. + + * cplus-parse.y, c-parse.y: Add new function `set_yydebug'. If + YYDEBUG is defined, sets `yydebug' to VALUE. Otherwise, prints + warning that operation is invalid. + * toplev.c (main): Call `set_yydebug' instead of setting `yydebug' + directly. This allows user to turn YYDEBUG off for faster parsing. + + * cse.c (simplify_binary_operation): Eliminate abort when passed + DImode operands. + +Fri May 17 21:56:41 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * hard-reg-set.h (reg_class_superunion): New var. + * regclass.c (init_reg_sets): Compute reg_class_superunion. + (reg_classes_intersect_p): New function. + + * reload.c (find_reloads): Alternative is discouraged if it puts + a pseudo in a register class it doesn't prefer. + + * reload1.c (basic_block_needs): Now an array, per register class. + (reload): Compute separate basic_block_needs for each class. + (spill_hard_reg): If pseudo is only in one block, see if that block + needs a spill register of a class containing the hard reg; leave the + pseudo alone if not. + + * reload1.c (reload_mode, reload_nregs): New vars. + (reload_reg_class_lower): Use them. + (allocate_reload_reg): New function. + (choose_reload_regs): Track size and class of any groups. We + can inherit reloads if we are the size of the largest group or + if our class is disjoint from those needed for groups. + Try all inherits first before all spill register allocations + unless there is a later reload with a smaller class; call + allocate_reload_reg to do the actual allocation. + Use new vars above. + (emit_reload_insns): Delete output reload even if we weren't + storing to memory. + + * reload.h (reload_secondary_reload, reload_secondary_p): New vars. + * reload.c (push_reload): If secondary reload register is needed, + make a secondary reload. + * reload1.c (reload): Reload with reload_secondary_p nonzero is in use. + (choose_reload_regs): Likewise. + (emit_reload_insns): Handle secondary reloads, when needed. + + * reload1.c (reload): Add pass to remove death notes for things that + are no longer registers or don't die if we must preserve death notes. + (emit_reload_insns): Refine REG_DEAD notes to be more accurate; make + notes for secondary reloads. + + * reload1.c (emit_reload_insns): Abort for output reloads for jumps; + we have to implement this at some point. + +Fri May 17 20:08:22 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * protoize.c: Handle ultrix like BSD. + +Fri May 17 15:56:41 1991 Richard Stallman (rms at geech.gnu.ai.mit.edu) + + * Pass library function name to INIT_CUMULATIVE_ARGS. + * calls.c (expand_call): Pass extra arg to INIT_CUMULATIVE_ARGS. + * expr.c (emit_library_call): Likewise. + * function.c (assign_parms): Likewise. + * tm-*.h (INIT_CUMULATIVE_ARGS): Accept the extra arg. + (INIT_CUMULATIVE_INCOMING_ARGS): Likewise, just for symmetry. + +Fri May 17 15:41:22 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * tm-i386v4.h (ASM_OUTPUT_COMMON): Don't attempt alignment on a + three byte boundary. + +Fri May 17 15:25:16 1991 Tom Wood (wood at dg-rtp.dg.com) + + * function.c (assign_stack_local, assign_outer_stack_local): Make + the alignment in bytes. + +Fri May 17 14:31:00 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cplus-class.c (build_vbase_path): Only build a COND_EXPR if + NONNULL is zero. + (resolves_to_fixed_type_p): Check TREE_HAS_CONSTRUCTOR for + CALL_EXPRs and INDIRECT_REFs. + + * cplus-call.c (build_method_call): Add call to `constructor_name' + if BASETYPE changes. + * cplus-init.c (build_new): Add LOOKUP_NONVIRTUAL to FLAGS argument + to `build_method_call'. Constructors are never virtual. Also, set + TREE_HAS_CONSTRUCTOR bit for return value from `build_method_call'. + +Thu May 16 21:36:10 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * rtl.h (CONSTANT_P): Now true for a CONST_DOUBLE. + * combine.c, cse.c, emit-rtl.c, expr.c, integrate.c, loop.c: + Update for new meaning of CONSTANT_P to include CONST_DOUBLE. + * optabs.c, recog.c, reload.c, reload1.c, rtl.h, rtlanal.c: + Likewise. + * romp.md, rs6000.md, out-alliant.c, out-convex.c: Likewise. + * out-gmicro.c, out-i386.c, out-i860.c, out-m68k.c: Likewise. + * out-sparc.c, out-spur.c, out-tahoe.c: Likewise. + + * combine.c (SUBST, SUBST_INT): If INTO equals NEWVAL, don't + record the substitution. + (try_combine, subst, make_compound_operation, simplify_and_const_int): + No longer need check for changes before using SUBST macro. + (simplify_shift_count): Likewise. + + * integrate.c (copy_rtx_and_substitute, case CONST): If what + was originally a constant becomes something that is not a constant + when passed through a recursive call, return it without the CONST. + + * rtl.c (copy_most_rtx): New function. + * rtl.h (copy_most_rtx): Declare it. + * function.c (fixup_var_refs_1, case MEM): If a MEM contains VAR, + ensure the MEM isn't shared by copying it. + + * expmed.c (expand_divmod): If doing MOD, produce divide result + into unique pseudo so that we might CSE the division. + +Thu May 16 12:01:42 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * reload.c (push_reload): Try find_dummy_reload before dead regs. + + * function.c (assign_stack_local*): Use GET_MODE_ALIGNMENT. + Use CEIL_ROUND consistently. + Don't force word alignment even if STRICT_ALIGNMENT (experiment). + +Thu May 16 10:31:04 1991 Jim Wilson (wilson at sphagnum.cygnus.com) + + * unroll.c (unroll_loop): Don't abort if start label does not + immediately follow LOOP_BEG note. This can happen as a result of + jump threading. + * reorg.c (mostly_true_jump): Eliminate repeated test in second loop. + + * sched.c (priority): Abort if find a NOTE in a groups of insns that + must be scheduled together. + (free_pending_lists): New function. Moves every *_LIST rtx on the + pending lists to the free list. + (add_insn_mem_dependence): Get a *_LIST from the free list instead + of creating one if possible. + (sched_analyze_1): Don't move an insn across a call if it uses a + register that is not already live across calls. + (sched_analyze_insn): Likewise. + (sched_analyze_1): When flusing the pending lists, put the *_LIST + rtx on the free list. + (sched_analyze): Likewise. + (schedule_block): Likewise. + (sched_analyze_2): For a cc0 setter/user pair, put a copy of all + dependencies on the first insn onto the second insn. + (sched_analyze_insn): Likewise for call sequences. + (sched_analyze_insn): Handle REG_INC notes just like SETs. + (sched_note_set): Handle hard registers same as psuedo regs. + (attach_deaths): Likewise. Don't add REG_DEAD notes to the frame + pointer, arg pointer or stack pointer. + (schedule_block): Likewise. + (rank_for_schedule): Do not check whether each insn of a sequence + that must be scheduled together is ready. They will only reach here + if they are all already ready. + (schedule_block): After reload, don't need to give special treatment + to insns at function start which set up the function parameters. + Don't treat tail specially if it is part of a group that must be + scheduled together. + When a group of instructions is scheduled together, run the lifetime + analysis code on every instruction in the group from last to first. + A call_insn kills all call_used and global regs except those + explicitly used by the call_insn. + (schedule_insn): Initialize new variables. If USE_C_ALLOCA, free + alloced memory immediately after each schedule_block call, not once + at the end. + + * rtl.c (add_dependence): When adding a dependence that points to an + insn that is part of a sequence that must be scheduled together, + make the dependence point to the last insn of the sequence instead. + +Wed May 15 13:08:32 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (simplify_and_const_int): If we have + (and (OP (lshiftrt X Y) Z) C), for OP of IOR, XOR, and NOT, commute + OP and LSHIFTRT to put AND and LSHIFTRT adjacent to try to form + ZERO_EXTRACT. + + * combine.c (subst, gen_lowpart_for_combine, get_last_value_validate): + Use object's mode instead of VOIDmode when we make + (clobber (const_int 0)) in case someone uses the mode for significant + bits. + * rtlanal.c (side_effects_p): Reject non-VOIDmode CLOBBERs. + + * rtlanal.c (reg_set_p_1): Remove test for `reg_set_reg' being MEM. + (reg_set_p): Abort if passed a MEM. + + * toplev.c (strip_off_ending): Strip trailing ".f". + +Wed May 15 12:54:18 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cplus-typeck.c (build_modify_expr_1): If the TREE_TYPE of the + recursive result is an ARRAY_TYPE, change it to void_type_node so + build_compound_expr doesn't lose when calling default_conversion. + + * cplus-tree.h (lang_type): Remove AS_LIST field from lang_type. + Use TYPE_MAX_VALUE field of type instead. + (TREE_REFERENCE_EXPR): New macro. + + * cplus-parse.y (LC): If we are not in temporary allocation, call + permanent_allocation. This frees up any PARM_DECL nodes that were + allocated since we processed an inline function. NOTE: we still + have to clean up these parms from inline functions that did not go + inline. + + * cplus-decl.c (store_parm_decls): Since we no longer push an extra + binding level if ! PARMS_HAVE_CLEANUPS, test CLEANUP_LABEL to figure + out how far up the binding countours we must look. + (init_decl_processing): If FLAG_NO_INLINE is nonzero, set + FLAG_DEFAULT_INLINE to zero. + + * cplus-class.c (finish_struct_bits): Copy TYPE_MIN_VALUE and + TYPE_MAX_VALUE. These actually hold C++-related data that's moved + up from the lang_type data structure. + + * cplus-*.c: Change REFERENCE_EXPR to CONVERT_EXPR. Set + TREE_REFERENCE_EXPR bit to indicate a CONVERT_EXPR that's really the + address of a C++ reference expression. + +Wed May 15 12:30:26 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * tm-sparc.h (FIXED_REGISTERS): Register 0 is not fixed; it is used + for the condition code, not to represent the fixed %g0. + +Tue May 14 18:59:06 1991 Jim Wilson (wilson at sphagnum.cygnus.com) + + * explow.c (find_next_ref): Start search at first insn after INSN. + + * jump.c (jump_optimize): Update the three simplications that start + with the "if (...) x = 1; else {...} if (x) ..." case, so that when + HAVE_cc0 is not defined, they do not accept TST insns (which could + just be a register to register move). They should only accept insns + with the COMPARE operator. + +Tue May 14 14:51:33 1991 Tom Wood (wood at dg-rtp.dg.com) + + * cse.c (simplify_binary_operation): Don't abort when comparing + two CONST_DOUBLE values. + +Tue May 14 11:35:47 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-common.c (decl_attributes): Fix typo in name of attribute. + It should be `aligned'. Also don't crash on unknown attribute. + + * expmed.c (init_expmed): Make a separate object to free back to. + + * hard-reg-set.h (HOST_BITS_PER_LONG_LONG): Provide default definition. + + * toplev.c (main): Implement -gdwarf. + +Tue May 14 06:32:48 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * flow.c (mark_used_regs): Don't make REG_DEAD notes for fixed regs. + + * combine.c (subst): Convert (not (ashift C X)) to (or (rotate ..)) + and similarly for (not (lshiftrt C X)). + (make_field_assignment): Make corresponding change in how we recognize + bitfield assignment of single bit to zero. + + * combine.c (merge_outer_ops): New function. + (simplify_shift_const): Use merge_outer_ops to generalize and + simplify handling of outer_ops. + Try using distributive law followed by invert distributive law + to simplify combinations of logical operations and shifts. + + * emit-rtl.c (gen_highpart): Correct conditional that says when we + can get the bits of a DFmode object; copy from gen_lowpart. + + * cse.c (simplify_binary_operation, case MULT): Simplify zero case. + (simplify_binary_operation, case DIV): In 0/x, return zero in proper + mode. + + * combine.c (simplify_comparison): Can only extend comparison + to wider mode if equality comparison or test of sign bit. + +Tue May 14 03:26:36 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cplus-tree.h (lang_type): Change to use TREE_VEC to hold basetype + info. + (CLASSTYPE_N_BASECLASSES, CLASSTYPE_BASECLASS): Changed accordingly. + Baseclasses are now counted [0..n) instead of [1..n]. + (CLASSTYPE_BASETYPECLASSES): Deleted. + * cplus-*.c (various places): Change code to work with new + representation for basetypes. + + * toplev.c (main): Handle `-gdwarf' as a debug option. + + * cse.c (insert): Treat pseudos marked RTX_UNCHANGING_P as being + const. + +Mon May 13 22:44:18 1991 Jim Wilson (wilson at ok.cygnus.com) + + * mips.md: In the div/mod peepholes, don't apply the peephole if the + first operation overwrites one of its two operands. + +Mon May 13 12:14:51 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * expmed.c (store_bit_field, extract_bit_field): + Set volatile_p while checking predicates. + * recog.h (volatile_p): Declare it. + * explow.c (force_not_mem): Do nothing with BLKmode. + + * SYSCALLS.c (u_int): Don't define on DGUX--already defined. + + * m68k.md (zero_extend*): Don't make the subreg in the template. + Make it explicitly, and handle subregs as operand 0. + + * tm-convex.h (MODES_TIEABLE_P): Fix typos. + + * loop.c (check_dbra_loop): To check for a loop with a `break', use + loop_number_exit_label, not the uid_luid of each label, since loop + unrolling may have created new labels with no uid_luid. + + * expr.c (push_block): Fixed typo in last change. + +Mon May 13 12:07:25 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (subst): If we can't change comparison code, see if + we can instead surround our operation with an XOR. + + * combine.c (make_compound_operation, simplify_and_const_int): + Ensure shift counts are non-negative and in range before using them + to perform shifts. + (simplify_comparison): Likewise. + + * combine.c (try_combine): See if we have previously merged a + compare and arithmetic operation. If so try to take it apart to + allow further combines (such as making a branch-and-decrement). + + * combine.c (try_combine): Don't make VOIDmode register if our split + point is a constant. + + * combine.c (subst): Use COMBINE_RTX_EQUAL_P to see if SET_DEST + is our register; two hard regs might have different rtx. + + * combine.c (subst): Generalize associative law handling to + cases not involving constants. + + * combine.c (expand_compound_operation): If we would return a + (clobber (const_int 0)), return what we were given. + + * combine.c (simplify_shift_const): Clean up by removing fallthrough. + +Mon May 13 10:26:00 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * i386.md (all calls to output_move_double): call return + value to avoid spurious compiler warnings. + Allow REG in all alternatives of operand 0 where possible. + Remove patterns to recognize increment/decrement. + (addsi3, addhi3, addqi3): Do this in here instead. + (floatdidf2): New pattern. + (adddi3, subdi3, negdi2): New patterns. + (umulsi3, umulhi3): Remove obsolete UMULT patterns. + (divM3, udivM3, divmodM4, udivmodM4): Use "r" constraint instead + of "x" or "abc". + (sqrtsf2, sqrtdf2): New patterns. + (ashldi3, ashrdi3, lshldi3, lshrdi3): New patterns + (All shift and rotate patterns): Don't use reg name explicitly in + output string: use %N operand reference. + (ashlM3, lshlM3): Use `add' instead of `shl'/`sal' if possible. + (insv): Fix output constraint. Clarify source. Disable for now - + makes worse code. + (SImode bit test, all Scond patterns): Allow MEM operands too. + (seq, sne): Handle CC_Z_IN_NOT_C. + (jump, indirect_jump, tablejump): Align code on word boundary + after unconditional jumps. + (`loop' patterns): Delete - will never be useful on i386. + (call_pop, call_value_pop): New patterns. + (return): New pattern: Do `return' if simple epilogue. But only if + the real function epilogue isn't next. + (movstrsi): Do word moves, not just bytes, if count is unknown. + (ffsM2): New patterns. + + * out-i386.c (FP_TOP, AT_SP, RET, RETCOM, POP_ONE_FP, + FP_CALL1, FP_CALL): Move to tm-i386.h for use by i386.md. + (output_movf, fp_call_internal, output_fix_trunc, split_di): + No longer static - called from i386.md. + (via_memory): Finish return value change. + (output_move_const_double): Delete unused function. + (simple_386_epilogue): New predicate. + (function_prologue): Allocate frame regardless of whether or not + there is a frame pointer. + Use output_asm_insn instead of fprintf to push registers. + (function_epilogue): Likewise. + If there is a frame pointer, don't necessarily fix %esp just to + pop a reg - use offset from frame pointer. + Fix -fomit-frame-pointer support. + Fix RETURN_POPS_ARGS case where args > 32K bytes. + (print_operand): A LABEL_REF gets an OFFSET_PREFIX too. + (print_operand_address): %esp can only be base reg, never index. + (split_di): New function. + + * tm-i386.h: Remove references to obsolete tm-compaq.h file. + (TARGET_486): New flag. + (TARGET_SWITCHES): New options -m486, -mno486, -m386. + (SMALL_REGISTER_CLASSES): New macro. + (ASM_OUTPUT_LOOP_ALIGN): New macro. + (all reg macros, ARG_POINTER_REGNUM): Create argument pointer, + to be eliminated in favor of %esp or %ebp. + (HARD_REGNO_NREGS, REGNO_REG_CLASS): Use FP_REGNO_P. + (REGISTER_MOVE_COSTS): It is expensive to move between integer and + float registers. + (FP_REGNO_P): Detect only the FP regs. + (all class macros): Delete obsolete classes ABC_REGS & ABCI_REGS. + (REG_CLASS_FROM_LETTER): Add `S' for SIREG, remove `x' for ABCI_REGS. + (CONST_OK_FOR_LETTER_P): Add `J' for DImode shifts. + (FIRST_PARM_OFFSET): Offset now zero. + (ELIMINABLE_REGS, CAN_ELIMINATE, INITIAL_ELIMINATION_OFFSET): + Use generalized scheme to eliminate frame and arg pointers. + (INITIAL_FRAME_POINTER_OFFSET): Delete. + (REG_OK_FOR_BASE_P): allow virtual arg pointer. + (FP_TOP, AT_SP, RET, RETCOM, POP_ONE_FP, FP_CALL1, FP_CALL): + Moved here from out-i386.c for use by i386.md. + + * tm-compaq.h: Delete obsolete file. + +Sun May 12 18:38:41 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-decl.c (print_binding_level, print_binding_stack, + print_other_binding_stack): New debugging routines; dump one or + more binding levels to stderr. + + * cplus-decl.c (push_to_top_level): New routine; saves copies of + all class and local bindings, and some other state, and clears the + real values, to effectively move to global scope. + (pop_from_top_level): Restore the saved state. + + * cplus-decl.c (adjust_type_value): No longer static. Abort if + current_binding_level is class binding level; need to investigate + that situation further. + + * cplus-decl.c (finish_function): Check that the binding level being + popped really is a function-parameter binding level. + + * cplus-tree.h (DESTRUCTOR_DECL_PREFIX): Replaces + DESTRUCTOR_DECL_FORMAT; used as a prefix before the class name. + * cplus-decl2.c (grokclassfn): Use it, and call build_overload_name + rather than just copying the class name. + + * cplus-method.c (fndecl_as_string): Use TREE_TYPE rather than + indirecting through type name and the identifier's associated type, + since the latter may have changed. + (build_nested_name): New argument, text_end; callers changed. Call + build_overload_identifier rather than copying class name. + (build_overload_value): Strip non-lvalue nodes for all arguments. + Fixed up the handling of negative DImode values. + (build_overload_identifier): New function. Copy class name (with + length) if non-template, or build a name from template parameters. + (build_overload_name): Call build_overload_identifier for class + names. + + * cplus-parse.y: Added comment about use of $$ for $1. + (template_type_name): Removed useless precedence specificiation. + (template_arg_list): Wrap TREE_LIST nodes around all arguments in + the list. + (template_arg): Call groktypename on type names. For expressions, + specify "UNARY" precedence. + (PRE_PARSED_CLASS_DECL handling): Put a copy of the new class decl + into global scope, to avoid recursive expansion, since we start in a + non-global scope set up for the parameters. + + * cplus-pt.c (coerce_template_parms): New function. Converts + template arguments to appropriate types, returns a vector containing + results. + (mangle_class_name_for_template): Removed nparms argument. + Changed to deal with arglist as vector. No longer call + groktypename. Some initial code added for PARM_DECL (non-type) + parameters; work not completed. + (lookup_template_class): Call coerce_template_parms. Removed some + unused code. + (push_template_decls, pop_template_decls): Fixed to deal with + arglist as vector. More code for non-type parameters. + (instantiate_template): Push to top binding level before pushing any + declarations. + (end_template_instantiation): Pop from top level, then push the new + decl at top level. + + * cplus-tree.h (struct lang_identifier): Renamed field "template" to + "class_template_info"; accessor macros changed. + + * cplus-pt.c (struct template_info): Renamed from "template". + Removed unused fields. + +Sun May 12 17:38:46 1991 Jim Wilson (wilson at cygnus.com) + + * unroll.c (copy_loop_body): Fix typo: had `==' for `='. + +Sun May 12 17:05:07 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * genattrtab.c (gen_attr): Clear has_asm_insn field in new object. + +Sun May 12 04:21:52 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * hard-reg-set.h (HARD_CONST): New macro. Converts integer + constants to appropriate type for use with HARD_REG_SET. + ({SET,CLEAR,TEST}_HARD_REG_BIT): Use this macro where appropriate. + (GO_IF_HARD_REG_SUBSET): Ditto. + (HARD_REG_SET): Add new case if FIRST_PSEUDO_REGISTER <= + HOST_BITS_PER_LONGLONG. + * global-alloc.c: Pass HARD_CONST (0) instead of 0 to functions + which are looking for a HARD_REG_SET argument. + * reorg.c (resource_conflicts_p): Change comparison of HARD_REG_SET + value to compare against HARD_CONST. + + * all xm-*.h files: Added HOST_BITS_PER_LONGLONG where + HOST_BITS_PER_LONG was defined. + * tm-sparc.h (REG_CLASS_CONTENTS): Fixed in case we're using long + long HARD_REG_SETs. + + * toplev.c (main): support -gdwarf switch. + + * longlong.h (umulsidi3): SPARC .umul routine returns the value in + WORD_LITTLE_ENDIAN form, so swap. Other word-endian changes for + inline mul routines. + + * gnulib2.c (__divdi3): If C is nonzero, negate whole division + instead of returning negation of quotient. + +Sat May 11 20:06:08 1991 Torbjorn Granlund (tege at krishna.sics.se) + + * expmed.c (outside of functions): New vars: lea_cost, lea_max_mul. + (init_expmed): Initialize lea_cost and lea_max_mul. + (synth_mult): Use them. + +Sat May 11 20:11:41 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cplus-class.c (build_vbase_path): Rewritten and simplified. + * cplus-cvt.c (build_up_reference): Try to get away without building + a NOP_EXPR around the return value of `build_component_addr'. + Ditto for return value from `convert_pointer_to'. + + * cplus-decl.c (void_zero_node): New node. Used in conditional + expressions where one arm must do nothing. + * various places: replace calls that built this node dynamically to + just use the global copy. + * cplus-tree.h (void_zero_node): Declare it globally. + + (maybe_build_cleanup): Don't call `convert_force' on the return + value of `build_unary_op'. We should have license to modify its + type without harm. + * cplus-gc.c (protect_value_from_gc): Same idea for VAR_DECL and + PARM_DECL nodes. + + * toplev.c (f_options): Add choice for -fPIC. + + * varasm.c (assemble_function): If it's a function name that's the + first global name, strip of a leading '*' if there is one. + + * reload.c (find_reloads): Fix comment. + + * stmt.c (expand_return): Call `any_pending_cleanups' with argument. + + * expr.c (expand_expr): In TARGET_EXPR case, If TARGET is null and + DECL already has rtl, use that as the target. + (expand_expr): In BIND_EXPR try using expand_{start,end}_bindings to + catch cleanups...otherwise fixup_cleanups must be modified to deal + with cleanups not in any contours. + +Sat May 11 15:09:42 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * out-i386.c (via_memory): Return a memref to the stack. + (fp_call_internal): Change call to via_memory. + + * expr.c (push_block): New arg BELOW specifies padding direction. + All callers changed. + (emit_push_insn): Pass an interesting value for BELOW. + + * c-parse.y (typespec): Pass the TYPE_DECL for a typedef name. + * c-decl.c (grokdeclarator): Handle TYPE_DECL in declspecs. + +Thu May 9 15:17:44 1991 Tom Wood (wood at dg-rtp.dg.com) + + * m88k.md (zero_extend pattern): Compute correct constant. + +Thu May 9 07:44:20 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (subst): Remove WAS_REPLACED; always check the rtl + for specific cases of interest and don't use TO and FROM when + looking into the rtl. + + * combine.c (subst, case MEM): Call make_compound_operation here + so any ASHIFTs will be MULTs for mode_dependant_address_p calls later. + (subst, case PLUS): Remove cases already done elsewhere. + + * expmed.c (emit_store_flag): Don't let the delete_insns_since call + we do kill insns to do an auto-inc. + + * flow.c (propagate_block): Don't treat global regs as clobbered + over a CALL_INSN even if call-clobbered. + + * stmt.c (expand_end_stmt_expr): Correctly handle the case where an + expression statement is just an auto-inc of a var. + + * sparc.md (fix_trunc[sd]fsi2): Finish change to use MATCH_SCRATCH + by eliminating DEFINE_EXPAND and making DEFINE_INSN a named pattern. + +Wed May 8 13:31:23 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * cccp.c (rescan): Handle symbols before // as before /*. + + * Makefile.in (objc-parse.o): Specify the command. + + * c-parse.y (typespec): Fix previous change. + + * reload1.c (choose_reload_regs): Use spillregs in round robin. + +Wed May 8 11:00:29 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-lex.c (tree_node_kinds): Renamed to `tree_node_counts'. + +Wed May 8 05:50:29 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * integrate.c (copy_rtx_and_substitute): Don't round frame size. + + * loop.c: Must include insn-flags.h to get + HAVE_decrement_and_branch_until_zero. + * Makefile.in (loop.o): Likewise. + + * expmed.c (expand_divmod): Use LOG instead of INTVAL (OP1) + once we start generating rtl. + +Wed May 8 05:38:06 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cplus-decl.c (duplicate_decls): Don't crash on duplicate + TEMPLATE_DECLs. + (globalize_nested_type): Handle globalizing types when + CLASS_BINDING_LEVEL goes out of effect. + (init_decl_processing): Comment out decls for ABS, FABS and LABS. + They conflict with libg++ inlines. + + * cplus-decl2.c (build_push_scope): Fix bug in last change. + (finish_file): Make the dummy decl that we tack on to the global + scope a TYPE_DECL instead of a VAR_DECL. Fake global VAR_DECLs are + problematic on some machines (i.e. MIPS). + + * cplus-init.c (init_vfields): Use TREE_TYPE (VFIELDS) to find the + type for which the VFIELD was last distinguished. This picks up + cases where single inheritance overrides base class vtables and the + base class does not get a new vtable for the override. + + * cplus-parse.y (named_class_head_sans_basetype): Handle a + `template_type_name' by itself. This happens with e.g. + friend class Stack<T>. + + * cplus-pt.c (mangle_class_name_for_template): Put ',' between + parameters. + (push_template_decls): Don't crash if ARGLIST is ERROR_MARK_NODE. + + * cplus-class.c (finish_base_struct): Compute MAX_HAS_VIRTUAL by + looking at all the base classes relevant to VFIELDS. + (build_vbase_path): Initialize NONNULL to zero. + +Tue May 7 23:47:42 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * stmt.c (any_pending_cleanups): Don't fail if block_stack is empty. + +Tue May 7 22:46:16 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (simplify_binary_operation; case EQ, NE): Don't assume + the address of a symbol is non-zero. + + * sched.c (schedule_insns): Ensure we free memory used by + schedule_block when using the C alloca. + +Tue May 7 14:13:57 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * reload1.c (mark_reload_reg_in_use): New arg MODE. Mark all the regs. + (choose_reload_regs): Pass that arg; don't loop here. + + * c-parse.y (typespec): Convert a TYPENAME to its meaning. + + * fold-const.c (fold): Don't assume symbolic constant is nonzero. + + * c-typeck.c (c_expand_asm_operands): Convert arrays, fcns to pointers. + +Mon May 6 23:29:21 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (cse_insn): Only make a REG_WAS_0 note if the previous + set was to the same register, not just the same quantity; + if previous REG_WAS_0 note, update back pointer. + If setting a register to a constant, update QTY_CONST and + QTY_CONST_INSN so it points to the last set. + In special case for (set REG0 REG1), ensure any REG_WAS_0 notes are + updated correctly. + + * genrecog.c (make_insn_sequence): Don't clobber `i' when it is + still needed. + + * out-vax.c (print_operand_address): Fix bug in last change in handling + (plus (reg) (reg)). + +Mon May 6 16:41:50 1991 Torbjorn Granlund (tege at zevs.sics.se) + + * expmed.c (synth_mult): Make it handle t == 0. Improve comments. + Use (max_cost <= add_cost) instead of (max_cost < add_cost) to + determine if we should fail early (to better prune the search). + Remove loop with n from factor synthesis. Remove -2 bias from m + loop (for clearity). Add code to use load-effective-address + instructions. Use bit-fiddling instead of loop to determine q in + the last synthesis case. + +Mon May 6 11:21:45 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-typeck.c (convert_for_assignment): Reword an error message. + + * c-typeck.c (build_conditional_expr): Typo in last change. + + * Makefile.in (enquire, enquire.o): Depend on gnulib. + +Sun May 5 17:28:22 1991 (Eric Youngdale at youngdale@v6550c.nrl.navy.mil) + + * make-cc1.com: Update for GCC 2.0; build insn-attr.h, insn-attrtab.c. + Compile and add obj to linker list: c-aux-info.c, c-common.c, c-lang.c, + aux-output.c, calls.c, dwarfout.c, function.c, reorg.c, sched.c, + sdbout.c, unroll.c, insn-attrtab.c. Remove references to symout.c. + +Sun May 5 15:32:01 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * Makefile.in (rest.encap): Make gnulib before float.h. + + * c-typeck.c (build_conditional_expr): + Don't assume symbolic constant is nonzero. + + * reload1.c (choose_reload_regs): Ignore avoid_return_reg. + (reload_as_needed, reload): Don't bother setting avoid_return_reg. + +Sun May 5 14:30:14 1991 Michael Tiemann (tiemann at cygint.cygnus.com) + + * cplus-class.c (prev_class_type): Declare this to be static. + (build_vbase_path): Test NONNULL to decide whether a COND_EXPR is + actually needed. + (finish_struct): Another sort of hard virtual function to deal with + is one which comes from the non-leftmost baseclass, and who's index + is different between that class and the main derived class. Use new + variable DOING_HARD_VIRTUALS to control when we punt and when we + plow through. + (modify_vtable_entry): If we find at this point that we have a hard + virtual function, just put it on the list PENDING_HARD_VIRTUALS if + DOING_HARD_VIRTUALS is nonzero. + (fixed_type_p): Handle SAVE_EXPR, RTL_EXPR, PLUS_EXPR, MINUS_EXPR, + NOP_EXPR and CONVERT_EXPR. + (pushclass): Fixed comment. Also change test for whether this is + the top-level class scope from an obscure one to an obvious one, and + add comment. + (pushclass,popclass): Now always allocate a binding level. Later + we'll have to rewrite this to actually use it. + + * cplus-gc.c (type_needs_gc_entry): Don't need a GC entry for + ERROR_MARK_NODE. + + * cplus-init.c (build_new): Set TREE_CALLS_NEW on RTL_EXPR. This + gives us a case that `fixed_type_p' can grok. + + * cplus-lex.c (identifier_type): Make this __inline if compiling + with GNU C. + (tree_node_kinds): Renamed to `tree_node_counts'. + + * cplus-parse.y (various places): Take advantage of default rule + `$$ = $1', and where possible, use $$ instead of $1. + Also, back out change for setting `looking_for_typename' to 1 at top + level. + + * cplus-decl2.c (build_push_scope): If the user gives X::foo in X's + scope, don't return a SCOPE_REF. Just return `foo' instead. + + * cplus-decl.c (init_decl_processing): Don't define `alloca' as a + built-in function until libg++ header files agree with its built-in + type. + (finish_decl): Don't crash if TYPE is error_mark_node. + + * fold-const.c (split_tree): When splitting the tree, don't call + convert if the TYPE_MODEs are the smae. This screws up C++ where + conversion of one pointer type to another can cause the pointer's + value to change. + + * tree.c (get_identifier): Speed up `get_identifier' by about a + factor of 2. This becomes noticable with the long names used for + C++ overloading. + (tree_cons): Make this most frequent user of `make_node' perform its + actions inline. + + * calls.c (expand_call): Eliminate many (most) calls to strcmp by + being smarter about when to call it. Also, don't call `push_block' + in the trivial case when it's not needed. + +Sun May 5 08:51:14 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * expr.c (convert_to_mode): Fix (for the second time) test for when + gen_lowpart should be called. + + * cse.c (find_best_addr): Try to fold address. + (fold_rtx): Do associativity and (not (not ...)) checks here. + (cse_insn): Not here. + + * combine.c (recog_for_combine): New parameter, PNOTES. + When we add a CLOBBER, put a REG_UNUSED note for it in *PNOTES. + (try_combine): Call recog_for_combine with new parameter. + Delete any now-invalid REG_UNUSED notes in OTHER_INSN and add any + required new ones. + Add REG_NOTES to I3 and I2 due to added CLOBBERs. + (remove_death): Call new function, remove_note. + (move_deaths): Don't get confused by a CLOBBER. + (distribute_notes): Don't make duplicate REG_UNUSED notes. + Don't put a REG_DEAD note on an insn when the register is + partially modified, but remains valid. + + * rtlanal.c (remove_note): New function. + + * combine.c (try_combine): When making a PARALLEL that does a compare + and arithmetic, don't simplify the COMPARE. + + * combine.c (try_combine): Validate that I1DEST isn't being + modified invalidly. + + * combine.c (simplify_comparison): In ZERO_EXTRACT case, add missing + test for equality comparison against zero; also invert comparison + condition. + If we can't do a comparison in a narrower mode, but we know that + some wider bits are zero, see if we can do it in a wider more. + + * cse.c (simplify_binary_operation): Remove obsolete code to convert + negative shift counts to the opposite shift. + Don't fold invalid shifts since they may trap (e.g., on Vax). + + * reload1.c (emit_reload_insns): Use rtx_equal_p to see if a result + is already in the desired register. + + * combine.c (find_split_point): Add two more ways to split an insn. + + * combine.c (gen_binary): Put a complex operand first in addition to + putting constants second, just like subst would do. + + * combine.c (significant_bits): Correct computation of significant bits + for division operations. + + * combine.c (apply_distributive_law): Reject complex SUBREGs. + SUBREG distributes over logical and addition operations. + + * combine.c (subst; case AND, IOR, XOR): Add some boolean + arithmetic simplifications. + + * expr.c (do_jump): ADDRESS_EXPR is not always zero, unfortunately. + + * expr.c (do_store_flag): In case where we are testing a single bit, + don't convert to output mode until after we do the shift. + + * optabs.c (expand_binop, expand_unop, expand_fix): Compare + enum insn_code objects against CODE_FOR_nothing instead of 0. + + * romp.md (bit_insv): Use CC0 in standard way; i.e., in NE. + +Sat May 4 20:41:12 1991 (Eric Youngdale at youngdale@v6550c.nrl.navy.mil) + + * c-aux-info.c (gen_aux_info_record): Use getcwd on VMS a la USG. + * dbxout.c: Same here. + * xm-vms.h: Define unlink as remove + (GCC_INCLUDE_DIR): Provide a dummy definition. + +Sat May 4 16:46:48 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * combine.c (can_combine_p, try_combine): Use SMALL_REGISTER_CLASSES + to indicate when it is valid to do combines involving hard registers. + * cse.c (canon_hash): #ifdef SMALL_REGISTER_CLASSES, don't record + hard registers unless they are fp, ap, sp or are fixed. + * loop.c (valid_initial_value_p): #ifdef SMALL_REGISTER_CLASSES, + hard register aren't valid initial values. + * reload1.c (reload): Initialize FORBIDDEN_REGS depending on + whether we have small register classes or not. + + * ns32k.md: Replace const_int with const_int_operand. + Remove HImode extractions. + Remove patterns assigning an AND to CC0. + (andcbxx3): Remove name and eliminate case with NOT as second operand. + (sbitx, cbitx): Remove patterns involving IOR and ASHIFT; add patterns + with ZERO_EXTRACT as destination. + (ibitx): Put ASHIFT as first operand in XOR. + (bitfield compare): Remove comparison of 1 bit field with 1; combine + converts this to comparison with zero. + (and-compare-branch): Fold PLUS or MINUS into constant, like combine + will do. + Remove patterns for reversed cases. + * out-ns32k.c (const_int): Deleted. + + * rtlanal.c (reg_used_between_p, reg_set_between_p): Use GET_RTX_CLASS. + (reg_set_p_1): If we are setting a MEM, don't think we are setting + registers used in its address. + + * m68k.md (cmpsf, cmpdf, tstsf, tstdf for FPA): Use MATCH_SCRATCH. + * sparc.md (memory store patterns): Likewise. + + * function.c (assign_parms): Function is varargs function if the + last parameter is `__builtin_va_alist_' instead of checking the first + parameter. Normally, this is the same, but some functions in MACH + have named parameters before va_alist. + + * combine.c (simplify_comparison): Remove abort on paradoxical SUBREGs + now that we know they can occur. + + * reload.c (decompose): Handle SCRATCH; it can't conflict with + anything. + (find_reloads): All operands can set earlyclobber, not just REG & MEM. + Add support for "X" constraint. + SCRATCH does not match "g" constraint. + +Sat May 4 14:03:16 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * enquire.c (EPROP): Avoid a <= out if bad is set. + + * SYSCALLS.c: Test bsd4_2 along with BSD. + +Fri May 3 14:26:51 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-decl.c (pushdecl): Stop looping on type if find error mark. + + * loop.c (invariant_p): An address with a PLUS is not the same as + MEM_IN_STRUCT_P being set. + + * tree.h (TREE_NO_UNUSED_WARNING): New macro. + * stmt.c (warn_if_unused_value): That flag suppresses warnings. + * c-typeck.c (build_unary_op): Set flag when converting postinc. + +Fri May 3 08:09:47 1991 Tom Wood (wood at dg-rtp.dg.com) + + * tm-m88k.h (GO_IF_LEGITIMATE_ADDRESS): Remove workarounds for + register elimination problems. + +Fri May 3 07:14:22 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * a29k.md: Fix typo in dmac pattern. + Make many define_splits that convert DFmode and DImode to one word + at a time to operate only after reload completes to improve reg alloc. + (movdf): Correct typo in mfacc. + (rotlsi3): Count is QImode, not SImode. + + * tm-a29kunix.h (BIGGEST_ALIGNMENT): Change to 64. + + * tm-romp.h (OPTIMIZATION_OPTIONS): Enable insn scheduling. + (register definitions): No longer need dummy register and class; + register numbers for FP register change. + * romp.md: Use MATCH_SCRATCH instead of allocating pseudos + to the dummy register class or base register depending on alternative. + (FP insns): Add missing "=" to constraints in CLOBBERs. + (extendqisi2, extendqihi2): Now DEFINE_EXPAND. + (mc03 peephole): Can do if right shift >= 24 bits. + * out-romp.c (reg_15_operand): Remove special case for FP delay slot. + (romp_sa_size, output_fpop, output_loadsave_fpops, output_fpops): + Change floating-point register numbers. + + * combine.c (simplify_shift_const, case for shifts): Verify that + the host word size is wide enough. + Properly handle (ashift (subreg (ashiftrt ...) ...) ...). + + * out-vax.c (print_operand_address, case PLUS): Handle all addresses + accepted by GO_IF_LEGITIMATE_ADDRESS. + + * explow.c (plus_constant): force_const_mem does not necessarily + return a valid address. + * integrate.c (copy_rtx_and_substitute): Likewise. + + * Makefile.in (local-alloc.o): Includes output.h. + * rtl.def (SCRATCH, MATCH_SCRATCH): New RTL codes. + * regs.h (max_scratch): Add definition. + * genconfig.c (walk_insn_part): Handle MATCH_SCRATCH. + * genextract.c (walk_rtx): Likewise. + * genemit.c (max_operand_1): Likewise. + (gen_exp): Emit a SCRATCH for for MATCH_SCRATCH. + (gen_insn): We can create (clobber (scratch)). + * genoutput.c (scan_operands): Handle MATCH_SCRATCH; + use switch instead of if's. + * genrecog.c (make_insn_sequence): We can created (clobber (scratch)). + (add_to_sequence): Handle MATCH_SCRATCH. + * flow.c (life_analysis): Initialize max_scratch. + (propagate_block): Update max_scratch with count from this block. + (mark_set_1): Make REG_UNUSED note for SCRATCH and count it. + * local-alloc.c: Include output.h. + (qty_scratch_rtx): New variable. + (alloc_qty): Rename INSN_NUMBER to BIRTH since that's what it is. + (alloc_qty_for_scratch): New function. + (local_alloc): Account for quantities needed for SCRATCH. + Allocate and initialize qty_scratch_rtx. + (block_alloc): Allocate quantities for SCRATCH operands. + (requires_inout_p): Add "X" constraint. + * recog.c (scratch_operand): New function. + (constrain_operands): SCRATCH matches a register constraint unless + strict. + Add "X" constraint. + * regclass.c (reg_class_record): Add "X" constraint. + * reload1.c (emit_reload_insns): Add SCRATCH to test for operand that + dies right away; update REG_UNUSED note for SCRATCH. + Never need reload insn for SCRATCH, even if no REG_UNUSED note. + * rtlanal.c (reg_mentioned_p, reg_overlap_mentioned_p, rtx_equal_p): + Support SCRATCH. + (volatile_refs_p, side_effects_p, may_trap_p): Likewise. + (inequality_comparisons_p, replace_regs): Likewise. + + * flow.c (mark_set_1): Don't do anything special with partial + assignments; this is already handled by mark_used_regs and we now + want to make LOG_LINKS for these. + + * combine.c: Includes expr.h. + (expand_field_assignment, make_extraction): New functions. + (get_pos_from_mask, make_field_assignment): Likewise. + (can_combine_p): Remove special case for SUBREG in SET_DEST; call + expand_field_assignment instead. + (try_combine): Remove code to handle STRICT_LOW_PART here. + Call expand_field_assignment on SETs in I3. + (find_split_point): Split up simple cases of bitfield assignments. + (subst, case ZERO_EXTRACT): Remove processing of ZERO_EXTRACT in a + SET_DEST from here. + (subst, case SET): Try to convert this into a field assignment by + calling make_field_assignment. + No need to call make_compound_operation for COMPAREs; + make_compound_operation now returns an rtx and is no longer passed + a pointer. + Remove tests for ZERO_EXTRACT in SET_DEST. + (make_compound_operation): Now returns rtx and is passed rtx, instead + of rtx *. + Call make_extraction. + (simplify_comparison): Call make_compound_operation here and remove any + outermost SUBREGs that aren't doing anything. + + * Makefile.in (combine.o): Includes expr.h. + + * expr.c (convert_to_mode): Correct which cases can use gen_lowpart. + + * final.c (final_scan_insn): Don't set INSN_DELETED_P after writing + insn. + + * genoutput.c (main): Don't include aux-output.c in insn-output.c. + Include stdio.h before output.h. + (output_epilogue): Write definitions for all the predicates + placed in `insn_operand_predicate'. + * output.h: No longer need to define operand-predicate functions. + * configure: (m88k/dg): Only difference between xm-m88k{,dgux}.h was + definition of SEPARATE_AUX_OUTPUT, so we don't need xm-m88kdgux.h. + * xm-m88kdgux.h: Deleted. + Fix typo setting `target' in Makefile. + * Makefile.in (AUX_OUTPUT2): Deleted. + (OBJS): Remove AUX_OUTPUT2 and add aux-output.o. + (aux-output2.o): Now aux-output.o. + (insn-output.o): No longer depends on aux-output.c. + * make-m88kdgux (AUX_OUTPUT2): No longer define. + * tm-m68k.h, tm-romp.h, tm-sparc.h: Define functions in out-*.c and + used by insn-output.c. + * tm-m88k.h: Remove conditionalization for SEPARATE_AUX_OUTPUT; now + always done. + No longer define predicate functions; done by genoutput.c. + * tm-mips.h: No longer define SEPARATE_AUX_OUTPUT. + * out-*.c: Add includes previously present in insn-output.c. + * out-sparc.c (output_fp_move_double): No longer static. + (output_sized_memop): No longer need to define asm_out_file here. + (output_function_epilogue): Correct type; function is void, not char *. + +Fri May 3 01:05:44 1991 Micheal Tiemann (tiemann at pogo.gnu.ai.mit.edu) + + * sdbout.c (sdbout_one_type): TYPE_FIELDs may contain other kinds of + _DECL nodes than just FIELD_DECL nodes (in GNU C++, at least). + Don't look through such nodes until further mods are made to handle + them better. + +Thu May 2 14:43:48 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-decl.c (finish_enum): Don't store enum type as type of value. + + * c-parse.y (YYPRINT, yyprint): New macro and new function. + + * expmed.c (expand_and): Handle both args constant. + + * expr.c (store_field): Avoid refetching from bitfield if possible. + + * math-68881.h (pow): Negate x if negative when taking log. + + * expr.c (emit_move_insn): Fixed typo in `y1 = change_address' call. + Reenable the code to move objects word at a time. + +Thu May 2 12:29:16 1991 Eric Youngdale (youngdale at v6550c.nrl.navy.mil) + + * cccp.c (hack_vms_include_specification): Modified conversion of + unix filenames to VMS filenames, if no VMS device or directory is + present, and a unix style directory name is present, then use the + first unix directory name as the VMS device spec. This is only + used in '#include <...>' type includes, when the include file has + not been found in the standard locations. + +Thu May 2 10:06:47 1991 Micheal Tiemann (tiemann at pogo.gnu.ai.mit.edu) + + * cplus-decl.c (init_decl_processing): Call init_gc_processing if + -fgc is requested. + * cplus-init.c (build_new): Argument to build_compound_expr must be + a TREE_LIST all the way. The last elt of the chain cannot be an + _EXPR. + +Thu May 2 07:33:50 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * expr.c (expand_expr, case CONVERT_EXPR): Pass bitsize to store_field + instead of size in bytes. + +Wed May 1 13:33:58 1991 Micheal Tiemann (tiemann at pogo.gnu.ai.mit.edu) + + * version.c: Bumped version number to 1.93. + +Wed May 1 12:26:36 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * gcc.c (link_command_spec): Pass plain -m to ld. + + * c-decl.c (finish_enum): Clean up re-laying out of type. + +Wed May 1 08:04:44 1991 Michael Tiemann (tiemann at cygnus.com) + + * Makefile.in: Handle new cplus-*.c files. + + * cplus-typeck.c (common_base_type): Make this function recursive. + (build_component_ref): Test whether or not a FIELD_DECL, not whether + or not a VAR_DECL||CONST_DECL||TYPE_DECL. + + * cplus-parse.y: Fixed grammar so that template type decls could be + used. Previously, support existed for template decls following + types, but not as types. + * cplus-pt.c ({push,pop}_template_decls): New functions. + (instantiate_template): Call `push_template_decls'. + (end_template_instantiation): Let `poplevel' restore old bindings. + No need to clear out extra stuff. + (pushclass, popclass): Call `{push,pop}_template_decls' if the class + we are pushing or popping has template arguments. These arguments + go at class level. + + * cplus-method.c (build_opfncall): Test TRY_SECOND before testing + possibly uninitialized XARG2. + + * cplus-lex.c (init_lex): Initialize NODE_TABLE, OPNAME_TAB and + ASSIGNOP_TAB to hold zero. Since these come from malloc'd memory, + we cannot trust them to be initialized on startup. + + * cplus-init.c (expand_aggr_init_1): When initializing through a + TARGET_EXPR for objects of the same type (e.g., X a = X (10);) + use EXP's DECL_RTL as the DECL_RTL of the TARGET_EXPR. + + * cplus-decl2.c (finish_file): Handle new flag `-fgnu-binutils'. + When zero, don't use GNU extensions to a.out format. ???Should be + merged into varasm.c. + + * cplus-class.c: Added support for `dossiers'. This support is + implemented by extending the virtual function table and by giving + all C++ objects a virtual function table to hold it's dossier. + * cplus-decl.c (record_builtin_type): New function to construct + dossier information for built-in types. + (output_builtin_tdesc_entries): To keep repeated information under + control, we only output this information for the file that contains + `main'. + (init_decl_processing): Many dossier-related changes. + (init_lex): Recognize new reserved words `headof' and `classof' if + -fgc. + * cplus-parse.y: Grammar now recognizes `headof' and `classof' + expressions. + * cplus-method.c: Added dossier constructors here. + * cplus-tree.h (CLASSTYPE_DOSSIER): New macro: `dossier' is a new + field in lang_type. + * cplus-typeck.c (convert_for_assignment): Handle + `class_star_type_node'. + + * cplus-class.c: New variable current_class_depth. Used to tell + what class nesting level the compiler is at. + * cplus-decl.c (grokdeclarator): Now supports references to decls + that come from nested types. For example, int foo::bar (foo_tag); + where `foo_tag' is a tag that comes from foo. Previously this was + supported only as int foo::bar (foo::foo_tag); + * cplus-decl2.c (build_push_scope): build a SCOPE_REF node while + pushing into the context for the scope. When `grokdeclarator' sees + one of these nodes (distinuished by its TREE_COMPLEXITY being set to + the current_class_depth), it processes the decl and pops the scope. + + * cplus-class.c (build_vbase_path): Trust objects that are + `fixed_type_p'. Also, don't assume an object is non-null unless + flag says this is explicitly so. InterViews creates and may + manipulate (via delete) lots of null objects. + (build_vfn_reference): Use IS_AGGR_TYPE test on type, not in + INSTANCE. + (resolves_to_fixed_type_p): New argument NONNULL is used in case we + know and object to be non-zero. All callers changed. + + * cplus-call.c: New file, from file cplus-class.c. Contains code to + generate method calls. + * cplus-class.h: New file, contains common declarations for + cplus-class.c and cplus-call.c. + + * cplus-class.c (finish_struct_bits): Don't leave last_conversions + uninitialized. + +Tue Apr 30 17:14:00 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * expr.c (expand_expr): + Preserve volatility when changing ARRAY_REF to use a pointer. + + * vax.md (indirect_jump): Use parens around register, not @. + + * fixincludes (machine/cpu.h): Delete superfluous `static'. + + * tm-decstatn.h (CPP_PREDEFINES): Define __mips and __LANGUAGE_C. + + * explow.c (allocate_dynamic_stack_space): Compensate if + STACK_POINTER_OFFSET throws off the alignment. + + * loop.c (strength_reduce): Typos setting not_every_iteration. + +Tue Apr 30 16:10:32 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * vax.md (bicb): Fix typo that caused operand not to be negated. + (jlbs/jlbc): Operand[0] cannot be a constant. + + * rtl.h: Put NOTE_INSN_... codes in order. + (find_regno_note): Add missing definition. + + * reload.c (find_reloads_address): Handle an indexed stack slot that + is made out of range by frame pointer elimination. + +Tue Apr 30 14:09:28 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * toplev.c (compile_file): Output gcc2_compiled, not gcc_compiled. + * tm-tower-as.h (ASM_IDENTIFY_GCC): Likewise. + +Tue Apr 30 13:56:40 1991 Tom Wood (wood at dg-rtp.dg.com) + + * varasm.c (output_addressed_constants): Return and indication of + whether the variable requires link-time relocations. + (assemble_variable, get_or_assign_label): Use this value when + choosing the section. Use the data section for variables and + constants that are otherwise read-only when -fpic is given and + when link-time relocations are required. + * tm-*.h (SELECT_SECTION): Accept a new second parameter RELOC. + +Tue Apr 30 10:24:36 1991 Tom Wood (wood at dg-rtp.dg.com) + + * rtl.h (NOTE_INSN_LOOP_VTOP), rtl.c (note_insn_name): Add a new + note indicating the virtual top of a loop. + * jump.c (duplicate_loop_exit_test): Mark the duplicated exit code + in the loop as the virtual top of the converted loop. + (squeeze_notes): Move loop-vtop notes as well. + * loop.c (scan_loop): When a loop-vtop note is encountered, reset + `maybe_never' and `call_passed'. + (strength_reduce): Similarly, reset `not_every_iteration'. + +Tue Apr 30 08:15:50 1991 Michael Meissner (meissner at osf.org) + + * expr.c (do_store_flag): Move the join label after setting the + target value to 0, rather than before, which generates code that + always stores 0 into the target if the machine does not have a + builtin scc operation. + +Tue Apr 30 06:26:36 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reload1.c (reload): When making reg_equiv_mem and reg_equiv_address + from reg_equiv_memory_loc, clear the one we aren't setting; it might + have been previously set. + + * final.c (final_scan_insn): Correctly handle when the first insn in a + SEQUENCE is a JUMP_INSN that forces restoration of a comparison + previously thought unnecessary. + + * fold-const.c (fold, case PLUS_EXPR): If we have 2 * real_cst, + fold into a new constant instead of making real_cst + real_cst. + +Mon Apr 29 23:09:17 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-decl.c (output_builtin_tdesc_entries): Corrected + declaration of permanent_obstack. + (init_decl_processing): Record declaration of int with name "int" + rather than null. + (finish_decl): Fix typo in comment. + + * cplus-class.c (finish_struct): Made error message for union + member requiring constructor/destructor a little tidier. + (resolve_scope_to_name): Look at fields of current type as well as + tags, in case of local typedefs. + (build_method_call): Permit explicit call of destructor in class + that doesn't have one. (That's what the ARM says....) + + * cplus-decl.c (set_nested_typename): New function, extracted from + within pushtag. Extended to deal with null classname. + (pushtag): Call it. + (pushdecl): For a TYPE_DECL, ensure that the nested typename gets + set. + (pushdecl_class_level): Ditto. + (constructor_name): Test various assertions. + (hack_incomplete_structures): If type is a class template, punt. + + * cplus-input.c (getch): Renamed from get_character. Callers + changed. + cplus-lex.c (old getch): Deleted. + + * cplus-lex.c (save_pending_input, restore_pending_input): New + functions for saving and restoring lexer state. + (process_next_inline): Restore lexer state after each function. + cplus-pt.c (end_template_instantiation): Ditto. + cplus-input.c (struct input_source, getch, feed_input): Preserve + putback_char and lexer state. + + * cplus-input.c (getch): Return magic cookie on end of saved input + for lexer to recognize. + cplus-lex.c (yylex): Turn it into END_OF_SAVED_INPUT. + (process_next_inline): Require it after inline function body. + + * cplus-lex.c (do_pending_inlines): Don't save away current + file/line-no info; character input processing should do that. + (yyungetc): Turn conditional abort into assertion test. + (note_list_got_semicolon): Since variable "type" is available, use + it rather than recompute. + (identifier_type): Now static. + (yylex): Warn about conflicts with class template expansion names. + + * cplus-parse.y (temporary_scope): New variable. + (object and scoped_id actions): Set it to current type. + (many other actions): Clear it. + (scoped_typename): Now derivable also from scoped_id and TYPENAME. + cplus-lex.c (yylex): If temporary_scope is set, use it to + determine type of current token being examined, instead of looking + always in the global scope. (Can't properly do nested template + classes otherwise.) + + * cplus-ptree.c (print_lang_decl): Print out template-info, + original-name, decl-main-variant, and pending-inline-info nodes if + not null. + + * cplus-pt.c (mangle_class_name_for_template): For negative + numbers, use "m" prefix rather than printf's "-". + (overload_template_name): Test more assertions. Use + SET_IDENTIFIER_TYPE_VALUE macro. + (lookup_template_class): Assert template decl node is non-null. + Push to permanent obstacks for new allocations. + (instantiate_template): Return new class type in a list. + + * cplus-pt.c (undo_template_name_overload): Clear type local + definition of template name. + (end_template_instantiation): Call it. + cplus-parse.y (structsp actions): Ditto. + (named_class_head_sans_basetype): Don't call + overload_template_name here. + (named_class_head): Call xref_tag, to define a tag, before calling + it here. + + * cplus-parse.y (tmpl.1, tmpl.2): Delete type declarations, since + they have no values. + (yyprint, YYPRINT): New function and macro to work with debugging + code added to bison. + (datadef -> template_header... actions): Assign yychar, rather + than calling yyungetc and yylex. Require trailing semicolon. + (fn.def1 -> PRE_PARSED_FUNCTION_DECL action): Preserve all of + terminal value, instead of just TREE_PURPOSE. + (tmpl.1 action): Do instantiation only if '{' or ':' not found. + (template_instantiation): Call overload_template_name right away. + (primary -> .scope new '(' typename ')' '[' ...): Detect and warn + about this construct, which appears to be recognizeable, though + disallowed by the ARM. + (primary -> delete[]): Return error_mark_node. + (primary -> obj TYPESPEC::~TYPESPEC()): Catch, parse as valid. + Returned value not determined yet. + (typespec): No longer derived from PTYPENAME. + (LC): Added missing semicolon at end of rule. + (stmt): A PTYPENAME can also be used as a label name. + +Mon Apr 29 22:18:47 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * tm-att386.h (ASM_OUTPUT_LOCAL): Align static local variables. + +Mon Apr 29 15:20:35 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * fold-const.c (fold): Don't assume an address is nonzero. + * cse.c (fold_rtx): Likewise. + + * stmt.c (warn_if_unused_value): No warning for cast of cast of modify. + + * Makefile.in (USER_H): Remove float.h. + +Mon Apr 29 13:46:48 1991 Jim Wilson (wilson at cygnus.com) + + * loop.c (scan_loop): When see a REG_EQUAL note, check for both + the move_insn and the REG_RETVAL case, since they can occur together. + (move_movables): For the move_insn case, handle library calls just + like the older normal case code below, that is, skip to the end of a + library call when when see a REG_LIBCALL note, and delete an entire + library call if when see a REG_RETVAL note. + +Mon Apr 29 12:58:19 1991 Jim Wilson (wilson at cygnus.com) + + * sched.c: (schedule_block): Rewrite code that computes which + registers are live at the end of the block. Compute this from + basic_block_live_at_start info of current block, instead of from + all reachable blocks. Previous code failed if one of the + reachable blocks consisted of dead code. + (sched_note_set): Set bb_live_regs when DEATH is false. + + * sched.c: Update copyright. Correct various problems with + indentation and white space. + (canon_rtx): Delete obsolete code handling INSN_LIST rtx. Add + code to recurse on the operands of a PLUS rtx. + (find_symbolic_term): New function. Recursively search an rtx for + a SYMBOL_REF or a LABEL_REF and return pointer to one if found. + (memrefs_conflict_p): No longer needs to call canon_rtx on + operands of a plus. Now handles case of two addresses with + different base addresses. + (schedule_block): Don't set INSN_DELETED_P bit of ignored notes. + Verify that REG_DEAD notes have a register value. + (sched_analyze_1): Ifdef out obsolete code which calculates cc0 + dependencies. + (sched_analyze): Likewise. + (schedule_block): Likewise. + (launch_links): Delete obsolete code for handling SPARC 'orcc' insns. + +Mon Apr 29 12:09:32 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * configure: Allow spaces between options and their args. + +Mon Apr 29 06:35:09 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * jump.c (jump_optimize): Don't emit jump to next insn; this would + cause jump_optimize to loop. + (jump_optimize, duplicate_loop_end_test, do_cross_jump): Never put + insn in jump_chain if its INSN_UID is too large. + (redirect_tablejump): Likewise. + +Sun Apr 28 08:00:01 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-decl.c (init_decl_processing): Merge changes in builtin + function handling to match the way that c-decl.c now works. + Also add global variables to support that change. + (define_function): Ditto. + + * cplus-decl2.c: Add flags for gc and xref. + * cplus-tree.h (DECL_GC_OFFEST): New macro for gc. + * cplus-tree.h: Rearrange CLASSTYPE_ASSOC and CLASSTYPE_BASETYPES so + that the former now uses TYPE_LANG_SPECIFIC storage, and the latter + uses TYPE_BASETYPES. + * cplus-tree.h: Change overload names of new and delete to `nw' and + `dl'. Formerly, `new' was being seen as `ne', the encoding for `not + equal'. + + * cplus-xref.c: New file. Adds support for generating + cross-reference information such as a class browser or program + analyzer would use. + + * cplus-gc.c: New file. Add support for garbage collection. + * cplus-decl.c (finish_decl): Tie decls to their places in the + garbage collector. + * cplus-init.c (build_new): Added hooks for gc. + * cplus-typeck.c (convert_arguments): protect arguments from the + garbage collector if -fgc. + (build_modify_expr): More gc-related changes. + +Fri Apr 26 07:31:26 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * integrate.c (expand_inline_function): Add missing increment of I. + +Thu Apr 25 11:07:11 1991 Tom Wood (wood at dg-rtp.dg.com) + + * m88k.md (various patterns): Use nonimmediate_operand in place of + reg_or_nonsymb_mem_operand and constraint `m' in place of `Q'. + * tm-m88k.h (EXTRA_CONSTRAINT): Only needed for a call address. + * out-m88k.c: reg_or_nonsymb_mem_operand and symbolic_memory_p are + now unused. + + * m88k.md (symbolic store patterns): These patterns are all + unnecessary and are deleted. + * out-m88k.c (emit_move_sequence): Eliminate the case that + generated a CLOBBER. This was intended to use the symbolic store + patterns, but isn't needed. + (symbolic_memory_operand): Delete, no longer used. + (output_prologue): Don't check for suspicious register elimination + changes. + * tm-m88k.h (GO_IF_LEGITIMATE_ADDRESS): Treat the frame pointer + like the argument pointer as both may change to REG+SMALLINT. + +Tue Apr 23 15:08:03 1991 Jim Wilson (wilson at cygnus.com) + + * out-sparc.c (output_scc_insn): Clean up and expand comments. + Don't assume that JUMP_LABEL fields are always valid, they aren't + when compiling without optimization. + +Mon Apr 22 13:56:43 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-class.c (prepare_fresh_vtable): Thoroughly update virtual + function tables that come from baseclasses to contain the latest + overrides from derived classes. This was done (in a different way) + for virtual baseclasses, but left undone for non-virtual + baseclasses. + (finish_struct_bits): Use assoc lists instead of class basetype list + to walk through the classes base classes. This gives us more + relavant classes to check against. + * cplus-init.c (init_vfields): New function to recursively walk + objects and make sure their vfields are initialized. + * cplus-init.c (emit_base_init): Call `init_vfields' from top level. + + * cplus-tree.h (TYPE_IDENTIFIER): New macro, gives the + IDENTIFIER_NODE for a given aggr TYPE. + * cplus-class.c (add_method): Use TYPE_IDENTIFIER. + * cplus-cvt.c (various places): Ditto. + + * cplus-class.c (finish_struct): Add TYPE_DECLs to the list of a + class's members that come from the types implicitly declared tags. + + * cplus-decl.c (grokdeclarator): If a function is declared `static + inline', don't give it global visibility, regardless of what #pragma + interface/implementation suggests. + + * cplus-decl.c (finish_function): ??? Questionable change for PIC: + don't let constructors and destructors that manipulate vtables go + inline, since this somehow reduces page sharing. Really??? + + * cplus-except.c (init_exception_processing): Use `pushdecl' to + install global info that this function sets up. That way later + decls can override this info (such as with an inline function). + + * cplus-init.c (build_vec_delete): Set TREE_SIDE_EFFECTS of + controller. Otherwise the loop won't execute. + + * cplus-method.c (prepare_inline): Rewritten and simplified. + (do_inline_method_hair): Ditto. + + * cplus-tree.c (lang_output_debug_info): Only output nested type if + we would also output enclosing type. + + * cplus-typekc.c (c_expand_return): Use pseudo for intermediate + return value if necessary. GCC can't read the function return + registers in an inline functino when the return value is being + ignored. + +Mon Apr 22 14:36:01 1991 Jim Wilson (wilson at cygnus.com) + + * sched.c (init_alias_analysis): Handle REG_EQUIV notes just like + REG_EQUAL notes. + + * sched.c (sched_analyze_2): Don't recurse on constant rtx's. + This is necessary so that the cc0_rtx in CONST_DOUBLEs won't be seen. + (sched_analyze): Call sched_analyze_insn for JUMP_INSNS also, so + that cc0 users will get an automatic dependence on their previous + insn. + (launch_links): Ifdef out special treatment of insns which set the + condition codes. This is obsolete, and was SPARC specific anyways. + (new_sometimes_live): Clarify code that aborts if regno is greater + than max_regno. + (schedule_block): If the last insn sets cc0, then it must always + be left in place. + (new_insn_dead_notes): New function. Determines whether a SET or + CLOBBER in an insn created by splitting needs a REG_DEAD or + REG_UNUSED note added. + (update_links): Ignore REG_EQUIV and REG_EQUAL notes on insns that + have more than one set. Generalize flow analysis of the sets in + the new insns so that it can handle new insns which have multiple + sets or new clobbers. + +Mon Apr 22 08:15:50 1991 Michael Meissner (meissner at osf.org) + + * gcc.c (input_suffix): New global var; holds current file's suffix. + (handle_braces): Substitute X in %{.S:X} if the current file has + suffix .S. Similarly, substitute X in %{!.S:X} if the current file + does not have suffix .S. + (validate_switches): Ignore .S part in %{.S:X} construct. + +Sat Apr 20 14:41:17 1991 Micheal Tiemann (tiemann at pogo.gnu.ai.mit.edu) + + * final.c (leaf_function_p): Define this in any event. + +Sat Apr 20 10:45:43 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * loop.c (check_dbra_loop): Use GET_RTX_CLASS when appropriate. + Check for setting biv with single_set rather than only allowing a SET. + If a loop has a `break', we can't reverse it. + + * cse.c (cse_insn): Fold inside operands of a CALL (mostly to find the + best address form to use). + + * cse.c (simplify_unary_operation): Convert (neg (neg ..)) to NEG. + Similarly for NOT. + (simplify_binary_operation): Simplify things like (-a) + b. + Convert UDIV with divisor a constant power of two into LSHIFTRT. + Similarly for UMOD. + Only fold shifts of a zero by a value into zero if the value has + no side effects. + Remove code to handle negative shift counts. + + * tm-a29k.h (OPTIMIZATION_OPTIONS): Allow insn scheduling to be + enabled, now that it works for the 29k. + + * tm-rs6000.h (LINK_SPEC): Add "-bhalt:4" to LINK_SPEC (don't ask!). + +Fri Apr 19 13:18:52 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * explow.c (memory_address): Test `cse_not_expected' instead of + `optimize' so that we don't make new pseudos after flow is run. + + * genflags.c (gen_insn): If extra condition is more than one line, + use \'s to make proper multi-line macro definition. + +Thu Apr 18 13:40:01 1991 Jim Wilson (wilson at cygnus.com) + + * loop.c (check_dbra_loop): Reenable no_use_except_for_counting code + which was mistakenly ifdefed out as buggy. The actual bug was in + strength_reduce, and has already been fixed. + +Thu Apr 18 09:47:25 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * loop.c (record_giv): Allow for the case where regno_last_uid + of DEST_REG has been moved or deleted. + + * rtlanal.c (replace_regs): Add missing argument in recursive call. + + * recog.c (nonmemory_operand): Only call general_operand for + a SUBREG if it is a MEM, just like register_operand. + + * local-alloc.c (block_alloc): Handle case where the last insn of + a REG_NO_CONFLICT block requires some CLOBBERs, but is a single SET. + + * out-romp.c, out-rs6000.c (next_insn_tests_no_unsigned): If a + REG_UNUSED note for (cc0) is present on INSN, return 1. + + * jump.c (delete_jump): If the previous insn sets cc0 but we can't + delete it for some reason, add a REG_UNUSED note for cc0 in that insn. + + * out-a29k.c: Rename input_operand to in_operand and output_operand + to out_operand to avoid conflict with output_operand in final.c. + * a29k.md: Likewise. + (call patterns): Don't put SYMBOL_REF in MEM for recursive call; + it might not be recursive if inlined; let cse do it later. + * tm-a29k.h (RTX_COST, ADDRESS_COST): All addresses have the same + cost, but MEM is expensive. + +Tue Apr 16 16:01:47 1991 Michael Meissner (meissner at osf.org) + + * configure: Add osfrose, osf, and mips/dec-osfrose. + + * out-mips.c (toplevel): Include necessary include files so + out-mips.c can be compiled separately. + (g_switch_value): New variable to hold -G xx value. + (g_switch_set): New variable to indicate if -G xx used. + (current_function_file): New variable to hold last .file. + (file_in_function_warning): New variable to hold if we've warned the + user that ECOFF can't switch files within a function. + (mips_rtx_classify): New array to classify an insn. + (mips_reg_names): New array to hold the register names. + REGISTER_NAMES initializes all elements to point into here, and + override_options resets the names if -mrnames is used. + (mips_sw_reg_names): New array to hold the alternate register names. + (mips_regno_to_class): New array to map hard register number to + register class. + (uns_arith_operand): Rewrite so call to register_operand is done + last, not first. + (arith_operand): ditto. + (arith32_operand): ditto. + (large_int): New function to return true if int constant will take 2 + instructions to load into a register. + (reg_or_0_operand): New function to return true if a register or + constant 0 is the operand for use in store patterns. + (md_register_operand): New function to return true if either the hi + or lo register is used. + (mips_const_double_ok): New function to return true if a + CONST_DOUBLE can be used as a constant in a RTL expression. At + present, only DImode constants and 0.0 is allowed. + (simple_memory_operand): New function to return true if a memory + reference is a simple register + small offset. + (gp_memory_operand): New function to return true if a memory + reference uses the global pointer. + (mips_move_instructions): New function to handle all data movement + of one word or less. + (mips_move_2words_instructions): New function to handle all data + movement of two words. + (init_cumulative_args): Remove print_tree debug call. + (function_arg_partial_nregs): Fix bug in passing structures where + the wrong field was used. + (print_options): Enable this function, body was in #if 0. + (override_options): Spell function name with two r's. Change how + the -G xx and -mGx options are handled. If neither passed use the + appropriate default. If -mgas make sure debug format is DBX, and if + not -mgas, use SDB debug format. If -mrnames and -mgas, give an + error message, otherwise set up mips_reg_names. Set up the + mips_rtx_classify array. + (print_options): New function instead of a long macro. Add %C to + print part of the opcode for a branch condition, %N to print the + inverted branch condition, %( to do .set noreorder, %) to do .set + reorder, %[ to do .set noat, %] to do .set at, %& to do .set + noreorder if filling delay slots, and %# to print nop if delay slot + not filled. + (print_operand_address): New function instead of a long macro. + (compute_frame_size): New function to abstract all the frame related + information like frame size, saved registers, etc. + (save_restore): Common function between the prologue and epilogue to + save/restore the registers in the proper order. Make $31 saved at + function pc +4. + (function_prologue): Call compute_frame_size and save_restore. Make + sure the appropriate .file is done before any statement in the + prologue since the MIPS ECOFF requires this. + (function_epilogue): Call compute_frame_size and save_restore. + + * tm-decstatn.h (CPP_PREDEFINES): Define the appropriate macros. + (*_SPEC): Move the DECstation related specs here from tm-mips.h. + + * tm-decrose.h (new file): File to support OSF/1 with OSF/rose + object format. + + * tm-mips-sysv.h (CPP_PREDEFINES): Define the appropriate macros. + (*_SPEC): Move the DECstation related specs here from tm-mips.h. + + * tm-mips-bsd.h (CPP_PREDEFINES): Define the appropriate macros. + (*_SPEC): Move the DECstation related specs here from tm-mips.h. + + * tm-mips-news.h (CPP_PREDEFINES): Define the appropriate macros. + (*_SPEC): Move the DECstation related specs here from tm-mips.h. + + * tm-iris.h (CPP_PREDEFINES): Define the appropriate macros. + (*_SPEC): Move the DECstation related specs here from tm-mips.h. + (SET_FILE_NUMBER): Define, so that .file number is always 1. + (LABEL_AFTER_LOC): Define, so that a label appears after .loc. + (STACK_ARGS_ADJUST): Iris frames require 32 bytes at the top of the + call frame instead of the normal MIPS 16. + + * mips.md (all): Add first cut at attributes to identify insn type. + (all): Where appropriate, use @ form for alternates, instead of + using C code. + (define_delay): Put arithmetic and one word stores in call, jump, + branch delay slots. + (define_function_unit): Add functional unit definitions for memory + and integer multiply/divide. + (anonymous add/subtract insn): Remove support for reg + large offset + that omitting the frame pointer caused in 1.xx to see if it is + needed anymore. + (mulsi3): Add clobbers for the hi/lo registers. Add a define_split + and an anonymous define_insn to separate the mult instruction from + the mflo. + (divmodsi4): Add clobbers for the hi/lo registers. + (udivmodsi4): Add clobbers for the hi/lo registers. + (divsi3): Add clobbers for the hi/lo registers. Restrict divides + and modulus to register / register. + (modsi3): ditto. + (udivsi3): ditto. + (ymodsi3): ditto. + (divide peepholes): Add two peepholes to catch divide followed by + modulus of the same values. + (anddi3): Remove pattern, use default behavior. + (iordi3): Remove pattern, use default behavior. + (xordi3): Remove pattern, use default behavior. + (truncsiqi2): Remove pattern, use default behavior. + (truncsihi2): Remove pattern, use default behavior. + (trunchiqi2): Remove pattern, use default behavior. + (truncdfsf2): Remove asm comment. + (extendhisi2): Add a define_split for shift case. + (extendqisi2): Add a define_split for shift case. + (extendqihi2): Add a define_split for shift case. + (movdi): Turn into a define_expand to guarantee that memory <-> + memory moves go through a register. + (movsi): ditto. + (movhi): ditto. + (movqi): ditto. + (movsf): ditto. + (movdf): ditto. + (movdi_internal): new define_insn. Add fp registers to the + alternatives. Call mips_move_2words_instructions to do the actual + movement. Require memory addresses to be offsetable. + (movdf_internal): ditto. + (movsi_internal): new define_insn. Add storing 0 to memory + directly using $0. Add transfer to/from multiply/divide registers, + and to the fp status register. Call mips_move_instructions to do + the actual work. + (movhi_internal): ditto. + (movqi_internal): ditto. + (movsf_internal): ditto. + (jump): Add %& to turn on .set noreorder if filling delay slot. + (tablejump): Ditto. + (call): Ditto. + (call_value): Ditto. + (indirect_jump): New required pattern, add %& for delay slot. + (nop): Use %( %) to turn on/off .set noreorder. + (probe): Use %[ %] to turn on/off .set noat. + + * tm-mips.h (abort): Define abort to be fancy_abort for now. + (toplevel): Move all extern's to the start of the file, rather than + scattered throughout. + (OPTIMIZATION_OPTIONS): New macro, -O sets -fomit-frame-pointer, and + -fdelayed-branch. -O2 sets -fstrength-reduce, -fcse-follow-jumps, + -fexpensive-optimizations, -fthread-jumps, -frerun-cse-after-loop. + -O3 sets -finline-functions. + (*_SPEC): Move most of the target specific spec's to the appropriate + file, rather than defining them in tm-mips.h. Defaults are for MIPS + RISC-OS with default system. + (CPP_SPEC): If preprocessing .S files, define LANGUAGE_ASSEMBLY + instead of LANGUAGE_C. + (MIPS_VERSION): Add meissner version number. + (MIPS_DEBUGGING_INFO): Define this for the future. + (TARGET_*): reorder which bit means what. Add bits so we can tell + whether any of the -mG[012] options were used. Redefine some debug + switches. + (BYTES_BIG_ENDIAN): Always define to 0/1 now. + (WORDS_BIG_ENDIAN): Always define to 0/1 now. + (MAX_PARM_BOUNDARY): Delete, since it's no longer used. + (BIGGEST_FIELD_ALIGNMENT): Define to be 64. + (CONSTANT_ALIGNMENT): New macro, make sure strings are aligned. + (DATA_ALIGNMENT): New macro, make sure byte arrays are aligned. + (FIRST_PSEUDO_REGISTER): Bump to 67, add hi, lo, fcr31. + (FIXED_REGISTERS): Add initializations for hi, lo, and fcr31. + (CALL_USED_REGISTERS): Add initializations for hi, lo, and fcr31. + (MD_REG_P): New macro to return if hi/lo register. + (ST_REG_P): New macro to return if fp control register. + (HARD_REGNO_NREGS): Return 4 for single precision complex. + (MODES_TIEABLE_P): Add complex float type support. + (FRAME_POINTER_REQUIRED): Make this always 0. + (NO_RECURSIVE_FUNCTION_CSE): New macro, define as 1. + (enum reg_class): Add class for the hi register, lo register, either + hi or lo registers, status registers. + (REG_CLASS_NAMES): Support new register classes. + (REG_CLASS_CONTENTS): ditto. + (REG_CLASS_FROM_LETTER): ditto. + (REGNO_REG_CLASS): Use an array to map register # -> class. + (CONST_OK_FOR_LETTER_P): Add `L' for constants which have bottom 16 + bits all zero, and `M' which require two instructions to load. + (CONST_DOUBLE_OK_FOR_LETTER_P): Use `CONST_DOUBLE_HIGH' and + `CONST_DOUBLE_LOW'. + (EXTRA_CONSTRAINT): New macro, `Q' for gp memory references, and `R' + for reg + small offset references. + (struct mips_frame_info): New structure to hold all frame related + information, calculated by compute_frame_size. + (INITIAL_FRAME_POINTER_OFFSET): New macro, use compute_frame_size to + calculate where the frame should go. + (ACCUMULATE_OUTGOING_ARGS): New macro, define so stack pushes are + folded into the frame. + (REG_PARM_STACK_SPACE): Redefine to take an argument and return 16. + (OUTGOING_REG_PARM_STACK_SPACE): New macro, define to say we must + allocate stack space for arguments passed in registers. + (TARGET_FLOAT_FORMAT): New macro, define as IEEE_FLOAT_FORMAT. + (FUNCTION_ARG_BOUNDARY): New macro to determine argument padding + requirements. + (MIPS_STACK_ALIGN): New name for AL_ADJUST_ALIGN macro. + (FIX_FRAME_POINTER_ADDRESS): Delete, no longer used. + (FUNCTION_PROFILER): No longer have to switch between different + register names, override_options now sets up reg_names correctly. + (TRAMPOLINE_TEMPLATE): New macro, define as a dummy. + (TRAMPOLINE_SIZE): ditto. + (INITIALIZE_TRAMPOLINE): ditto. + (INDIRECTABLE_ADDRESS): Delete, fold into GO_IF_LEGITIMATE_ADDRESS. + (GO_IF_LEGITIMATE_ADDRESS): If -mdebuga, don't allow <label>(<reg>) + type addresses, which the machine really doesn't support, but you + currently get better code in some instances by pretending it does + support it. + (LEGITIMATE_CONSTANT_P): Call mips_const_double_ok if CONST_DOUBLE. + (ENCODE_SEGMENT_INFO): New macro, set SYMBOL_REF_FLAG (ie, volatil) + if refering to an item via the gp pointer. + (SLOW_BYTE_ACCESS): Define to 1, it is supposed to generate better + code on RISC machines. + (classify_op): New macro to classify an insn. + (additive_op): Use classify_op to figure out if PLUS or MINUS. + (divmod_op): New macro to identify DIV, MOD, UDIV, UMOD insns. + (unsigned_op): New macro to identify UDIV, UMOD insns. + (REGISTER_NAMES): All names are now pointers into mips_reg_names, so + that we don't have to continually test whether -mrnames is used or + not. The override_options function sets this up appropriately. + (REGISTER_NUMCHAR): Deleted. + (REG_NAME): Deleted. + (ADDITIONAL_REGISTER_NAMES): Define both names for the gp registers, + so people can use either $r4 or a0 in asm statements. + (PRINT_OPERAND): Call print_operand function instead of expanding a + huge macro. Add %C, %N, %(, %), %[, %], %&, %#. + (PRINT_OPERAND_PUNCT_VALID_P): Add `(', `)', `[', `]', `&', and `#'. + (PRINT_OPERAND_ADDRESS): Call print_operand_address function instead + of expanding a huge macro. + (DBX_OUTPUT_SEQEND): New macro, emit .set reorder after filling + delay slot(s). + (ASM_OUTPUT_SOURCE_FILENAME): Add check for doing .file of same file + -- this is needed for the prologue to do a .file before all prologue + instructions, rather than after the instructions which set up the + stack. Also, warn about #line requests that cannot be honored in + MIPS ECOFF binaries. + (ASM_OUTPUT_CASE_END): Delete, since it was only used to go back to + the text section, and GCC does this now automatically. + (READONLY_DATA_SECTION): New macro, define to be rdata_section. + (SELECT_SECTION): Don't force volatile readonly items into .data. + (ASM_COMMENT_START): New macro, define to be '\t\t# ' for -dp. + (SEPARATE_AUX_OUTPUT): New macro, define this to separately compile + out-mips.c. + +Tue Apr 16 15:00:51 1991 Jim Wilson (wilson at cygnus.com) + + * unroll.c (final_giv_value): Use expand_binop instead of + gen_sub2_insn when emitting subtract insns, since expand_binop + will work for any operands. + + * sched.c (schedule_insns): Don't split no-op moves; doing so + breaks the code that handles REG_NO_CONFLICT blocks. + (update_links): Delete the code that prints a warning for + REG_EQUAL notes where the original dest can't be found. This no + longer occurs because of the above change. + + * sched.c: Generalize memory aliasing code so that it will work on + non-RISC machines. Instead of saving just the insn on the pending + lists, now saves both the insn and the mem rtx. Old variables + pending_read and pending_write replaced with pending_read_insns, + pending_read_mems, pending_write_insns, and pending_write_mems. + (read_dependence, true_dependence, anti_dependence, + output_dependence): Now passed a MEM rtx instead of a PATtern. + (add_insn_mem_dependence): New function. Adds an insn and a mem + to a pending list pair. + (sched_analyze_1, sched_analyze_2, sched_analyze): Modified to use + new pending list scheme. + (schedule_block): Likewise. + (schedule_insns): Likewise. + +Tue Apr 16 12:31:07 1991 Jeffrey A. Law (law at mole.gnu.ai.mit.edu) + + * Makefile.in (install-man): Look for protoize.1 and unprotoize.1 + in the current directory, not $(srcdir) + (install-headers): Use basename to strip off $(srcdir) from + include files when installing and changing mode. + +Tue Apr 16 08:10:38 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * rs6000.md (extendqixi2): Add CLOBBER to the first SET as well as + the second. + (load_multiple): Fix typo in operand number and add newline. + + * reload.c (find_reloads_address_1): Pass actual location of a + MEM used in an address; also handle the case when the MEM was + copied. Ensure we reload the copy, not the original address. + + * reload1.c (eliminate_regs, case {INSN,EXPR}_LIST): Correctly handle + the cases when one or more operations is (nil). + + * local-alloc.c (block_alloc): Check for REG_EQUAL on list insn + of REG_NO_CLOBBER sequence, not first. + (no_conflict_p): Set LAST and use INSN instead of P for loop start. + +Mon Apr 15 12:55:12 1991 Jim Wilson (wilson at cygnus.com) + + * loop.c (strength_reduce): Don't emit an insn after loop_end to + set the final value of a reversed biv. There is already an insn + there setting the biv's proper final value. + +Sun Apr 14 18:32:05 1991 Michael Tiemann (tiemann at cygnus.com) + + * gnulib1.c (various functions): Added declaration of INTIFY to + every function which has a FLOAT_ARG_TYPE argument or return value. + +Sun Apr 14 18:31:59 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-decl.c (store_parm_decls): Traditional float parm becomes double. + +Sat Apr 13 17:35:07 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * m68k.md (storing 32-bit field with movl): Allow any immediate arg 3. + + * expmed.c (store_bit_field): For fields bigger than a word: + Avoid special use of SImode, and don't crash if VALUE is CONST_INT. + +Fri Apr 12 02:04:46 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * reload.c (find_reloads): Like prev change here, for optional reloads. + + * tm-sparc.h (FUNCTION_BLOCK_PROFILER): Must set %o0 to the address + LPBX0 by adding in the low part of the address before calling + ___bb_init_func. + + * tm-next.h (ASM_OUTPUT_CONSTRUCTOR, ASM_OUTPUT_DESTRUCTOR): + New macros. Place reference to constructor or destructor into + constructor or destructor section. + + * tm-next.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS): Add + new constructor and destructor sections. + + * jump.c (squeeze_block_notes,squeeze_notes): Chage the name of + squeeze_block_notes to squeeze_notes. Also handle LOOP_BEG, LOOP_CONT + and LOOP_END notes, since these must remain in their original order. + + * cccp.c (skip_to_end_of_comment): Handle warn_comment. + + * m68k.md (dbra patterns): Use `=' in constraint of op 0. + + * gcc.c (process_command): Handle -save-temps. + (do_spec_1): Handle %g like %b if -save-temps. + (verbose_flag): Renamed from `vflag'. + + * tm-sparc.h (FIXUNS_TRUNC_LIKE_FIX_TRUNC): Don't define this. + +Fri Apr 12 00:57:48 1991 Jim Wilson (wilson at cygnus.com) + + * sched.c: Update all comments to reflect source changes. + Make old_live_regs a static global, instead of local to schedule_block. + Schedule_block is now void, since its return value was always 1. + Rename last_function_call_not_const to last_pending_memory flush. + This can not be a CALL_INSN or a INSN that writes memory. + New variable pending_lists_length so that the lists can be flushed + when they get too long. + Use GET_RTX_CLASS instead of multiple GET_CODE calls whenever it + makes sense. + (read_dependence): New Function. Returns one if two reads are + dependent. This can happen if both are volatile reads. + (true_dependence, anti_dependence, output_dependence): Two volatile + memory access are always dependent. + (order_calls): Function deleted. It was very short, it was only called + once, and it no longer did what its name implied. Its one call was + replaced with the body of the function. + (sched_analyze_1): Correctly handle stripping of SUBREGs, etc from + the set dest. + If the pending lists are longer than 32 when processing a memory + write, then make this write depend on all previous and all future + memory accesses so we can flush the pending list. This is necessary + because the algorithms used are O(N*N). + (sched_analyze_2): For memory reads, check whether it is read + dependent on any previous memory read (this can happen if both reads + are volatile). + (sched_analyze_insn): Replace call to order_calls with the body of + that function. + (sched_analyze): Don't clear last_memory_pending_flush for a non-const + call, since any future call must still depend on all previous memory + accesses. + (sched_note_set): Correct handling of SUBREGs, etc. For partial sets + of a register, must treat this exactly the same way as flow.c, i.e. + a partial set of a register does not kill the register. Delete + ifdefed out code which is obsolete. + (attach_deaths): New argument SET_P, which indicates whether this is + a set (if true) or a use (if false) of the rtx X. Correct handling + of REG_DEAD notes, to account for the new REG_UNUSED note. + (attach_deaths_insn): Pass new additional parameter to attach_deaths. + Always call attach_deaths for sets within a parallel. Call + attach_deaths for clobbers. + (new_sometimes_live): Ifdef out code which should never be executed, + and replaced with call to abort. + (schedule_block): Now void. + When processing block to find dead_regs, don't unlink REG_UNUSED notes, + but must mark the indicated register as dead. + (update_links): Completely rewritten to make more general. Now handles + all REG_NOTEs except REG_INC and REG_LABEL. No longer makes simple + assumptions about the form of instructions. New argument orig_insn, + which is the original unsplit insn. + (schedule_insns): Delete unused volatilep code. Pass new parameter + to update_links. + +Thu Apr 11 15:34:44 1991 Tom Wood (wood at dg-rtp.dg.com) + + * out-m88k.c (pic_addressing_base_rtx): Use pic_offset_table_rtx + instead. Otherwise, PIC fails miserably for inline functions. + (legitimize_address): Support -mbig-pic. + (print_operand): Add `g' for printing #got_rel (for -mbig-pic). + * tm-m88k.h (CONDITIONAL_REGISTER_USAGE): PIC_OFFSET_TABLE_REGNUM + is used and is fixed for PIC. + (GO_IF_LEGITIMATE_ADDRESS): Distinguish the -mbig-pic case. + * m88k.md (SImode hi16/lo16): Use %g for -mbig-pic. + +Wed Apr 10 21:53:32 1991 Jim Wilson (wilson at cygnus.com) + + * unroll.c: Change global variable declarations to static. + Four new global variables loop_iteration_var, loop_initial_value, + loop_increment, and loop_final_value, used for communication between + loop_iterations and precondition_loop_p. + (unroll_loop): Before deleteing the insns in the original loop body, + emit a label after the last insn to be deleted, to ensure that no + delete_insn call will delete past that point. + (precondition_loop_p): Use global loop_* variables setup by + loop_iterations, instead of trying to calculate their values again. + (copy_loop_body): Don't emit copies of the start_label. + (approx_final_value): COMPARISON argument now passed as the pair + COMPARISON_CODE and COMPARISON_VALUE. + (find_splittable_regs): When completely unrolling a loop, and the + initial value of a biv is a hard register or itself, then must + create a new register to hold its initial value for splitting. + (loop_iterations): Set the new global variables loop_*. + If the comparison value is an invariant register, then search the insns + before the loop to try to find a constant value for the register. + +Wed Apr 10 16:02:16 1991 Tom Wood (wood at dg-rtp.dg.com) + + * out-m88k.c (pic_addressing_base_rtx): A pseudo register coined + for each function as needed in legitimize_address. + (emit_move_sequence): Use legitimize_address instead of generating + HIGH/LO_SUM. + (legitimize_address): Rework, based on the sparc version, to + implement PIC. + (output_call): Use the #plt form when doing PIC. + (m88k_layout_frame): The addressing base register is no longer + fixed and r1 need not be saved for PIC. + (output_prologue): Output instructions to setup the addressing + base register if one is needed. + (print_operand_address): Support the PIC case. + * m88k.md (most patterns using hi16/lo16): Disable these for PIC. + * tm-m88k.h (CONDITIONAL_REGISTER_USAGE): No longer needed. + (ADDRESSING_BASE_REGNUM): Derived from pic_addressing_base_rtx. + (GO_IF_LEGITIMATE_ADDRESS): Accept the PIC case. + (LEGITIMIZE_ADDRESS): Use legitimize_address instead of HIGH/LO_SUM. + + * make-m88k, make-m88kdgux: Use SysV INSTALL = cp and for DG/UX, + use the bison -l option to allow debugging in c-parse.tab.c. + + * From kenner@vlsi1.ultra.nyu.edu. + * out-m88k.c: Include insn-config.h before conditions.h, which + requires it. + * xm-m88kdgux.h: Define SEPARATE_AUX_OUTPUT before including config.h. + * tm-m88k.h: Declare MD functions only if SEPARATE_AUX_OUTPUT. + + * tm-m88k.h, tm-m88kdgux.h, tm-m88ksvr4.h: Rework TARGET_VERSION. + +Wed Apr 10 08:19:02 1991 Richard Stallman (rms at apple-gunkies) + + * caller-save.c (emit_mult_restore): Typo testing offset[regno] sign. + + * fold-const.c (target_isinf): Test real value for infinitude. + * real.h (REAL_VALUE_ISINF): Use target_isinf. + + * configure: Change / to -- in value of `target' in Makefile. + +Tue Apr 9 20:09:49 1991 James Van Artsdalen (james at bigtex.cactus.org) + + * configure: Modify assignment to `target' in Makefile. + (AIX target): Use correct config files. + + * make-aix386: New file. + +Tue Apr 9 19:28:16 1991 Torbjorn Granlund (tege at zevs.sics.se) + + * longlong.h (header): + Modify definition of count_leading_zeros for input = 0. + * (68020): Test for __NeXT__ too. + * (68020 __umulsidi3, umul_ppmm, udiv_qrnnd): + Use constraints "dmi", not "g" (avoid address registers). + * (88000 add_ssaaa, sub_ddmmss): Use r modifier for output + templates, use J, not I, as constraint for the carry-in insns + * (at the end of the file): If UDIV_NEEDS_NORMALIZATION is not + defined, define it as 0. + +Tue Apr 9 19:14:34 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * function.c (optimize_bit_field): Fix typo. + + * cccp.c (do_define): Don't crash when a builtin macro is + redefined. + +Tue Apr 9 15:11:42 1991 Richard Stallman (rms at apple-gunkies) + + * expr.c (move_by_pieces): Don't fail to compile if no movqi. + + * emit-rtl.c (get_last_insn_anywhere): Use first nonempty seq. + + * varasm.c (assemble_constructor): Fix typo. + +Fri Apr 5 22:15:57 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * rs6000.md (extendqixi): Add CLOBBER to ASHIFTRT insn. + + * combine.c (simplify_shift_const): Shift operand of PLUS using + correct mode. + Correctly simplify outer_const when done. + + * reload.c (push_reload): Don't de-reference INLOC if it is 0. + + * expr.c (convert_to_mode): Call protect_from_queue. + +Fri Apr 5 13:29:55 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * varasm.c (ASM_OUTPUT_CONSTRUCTOR, ASM_OUTPUT_DESTRUCTOR): + Accept two arguments. + +Fri Apr 5 08:45:18 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * expmed.c (expand_divmod): Convert OP1 to COMPUTE_MODE when we + convert OP0. + + * combine.c (subst): Use gen_binary. + (simplify_comparison): If we have a ZERO_EXTRACT from a constant + with only one bit set, convert into comparison of position with + location of bit in constant; this simplifies ((1 << x) & 1) == 0. + + * combine.c (gen_lowpart_for_combine): Copy code for CONST_DOUBLE + from gen_lowpart instead of calling it; it will abort for certain + floating-point cases, while we will just surround the object with + a SUBREG. + +Thu Apr 4 22:31:36 1991 Jim Wilson (wilson at cygnus.com) + + * unroll.c (new file): Implements loop unrolling. Completely + unrolls small constant bounded loops. Unrolls other constant + bounded loops by an amount modulo the number of iterations so that + only one exit test is needed. Preconditions loops whose iteration + count can be calculated at run time, so that only one exit test + is needed. Can also unroll any other loop by having multiple + copies of the exit tests. Tries to simplify addresses while + unrolling. + + * tree.def: BLOCK trees have 4 fields, not 5. + + * toplev.c: Add new flag -dt to dump RTL after the second cse pass. + Define two new flags, flag_unroll_loops and flag_unroll_all_loops, + and add code to support their use for loop unrolling. Print the + exec time for the shorten-branch pass in the proper place, i.e. + after delayed branch reorganization. + + * stmt.c (find_loop_tree_blocks): New function. Creates a mapping + between BLOCK trees and loops. This info is needed when doing both + loop unrolling and outputting debugger info. + (unroll_block_trees): New function. Makes COPIES copies of the block + trees corresponding the loop indicated by LOOP_NUMBER, so that the + BLOCK notes inside the loop will still match the BLOCK trees for + the loop. + + * rtl.h: Document the new named pattern + "decrement_and_branch_until_zero". Add macros to access new + field of inline_header rtx, which holds a pointer to the function's + original DECL_INITIAL tree. + + * rtl.def: New entry for inline_header to hold a pointer to the + function's original DECL_INITIAL tree. + + * loop.h (new file): Move many declarations from loop.c to the new + file loop.h, and change some from static to extern, so that they + can be shared with unroll.c. Also globalize names for variables + changed from static to extern. + + * loop.c: Move many declarations from loop.c to the new file loop.h, + and change some from static to extern, so that they can be shared + with unroll.c. Add misc comments to better explain the code. + Change name of global arrays loop_start and loop_end to + loop_number_loop_starts and loop_number_loop_ends so that they won't + be confused with local loop_start and loop_end variables. + New variables loop_number_exit_labels, loop_number_first_block, + loop_number_last_block, loop_number_block_level, loop_n_iterations. + Old_max_reg renamed to max_reg_before_loop. Max_uid renamed to + max_uid_for_loop. Induct_var renamed to reg_iv_type. + Induct_struct renamed to reg_iv_info. Class_struct renamed to + reg_biv_class. Iv_list renamed to loop_iv_list. + Rename (struct induction) field always to always_computable. + Rename (struct induction) field family to next_iv. + New (struct induction) field not_replaceable. + (loop_opt): Add code to allocate some new arrays for unrolling + support. Add call to find_loop_tree_blocks to create the BLOCK tree + to loop map needed when unrolling and outputting debugger info. + (scan_loop): Fix setting of maybe_never of label/jump. The old code + always failed. + (prescan_loop): Delete obsolete code. + (find_and_verify_loops): Add code to initialize + loop_number_exit_labels. + (mark_loop_jump): Add code for keep chain of loop_number_exit_labels + for each loop. + (invariant_p): LABEL_REFs are not invariant when doing loop unrolling. + Remove static from definition, so that it can be called from unroll.c. + (strength_reduce): Change name of variable maybe_never to + not_every_iteration, to help emphasize that it is not the same + as the variable maybe_never in the code motion code. Modify code + that computes its value so that it will be false more often, resulting + in better code. + (strength_reduce): Added code to call the new loop unrolling + functions, e.g. unroll_loop, loop_iterations, etc. + (strength_reduce): New code to handle biv's and giv's which must + be set to their final_value after the loop exits. + (strength_reduce): Reversed giv's and biv's must have their values + calculated differently. Add new field reversed to struct induction, + and code to check and use its value. + (strength_reduce): Only check value of bl->nonneg for architectures + that have a decrement_and_branch_until_zero instruction. + (find_mem_givs): New argument loop_start. + (record_giv): New argument loop_start. + The always_computable field for DEST_ADDR givs is always set true. + New code to check for case of spaghetti code, in which case the + giv can never be considered replaceable. + (check_final_value): New function. For givs which are not otherwise + replaceable, try to calculate their final value, and then try + to use this to make them replaceable. + (update_giv_derive): Skip inner loop if giv is known to be underivable + at the beginning. Must set cant_derive if we pass an insn that + modifies the giv's biv, and we can't calculate an adjustment. + (emit_iv_add_mult): Remove static definition so that it is callable + from unroll.c. + (check_dbra_loop): Reversed biv's must be marked as such, so that + they can be treated specially in the rest of loop.c. + (final_biv_value): Moved to unroll.c, alongside the new function + final_giv_value. Extensively rewritten to work for most common + cases. + (update_reg_last_use): Verify that insns have a valid luid before + trying to use it. Don't perform any action if no value luid. + (get_condition): Correct initial comment. + (get_condition_for_loop): Remove static definition so it is callable + from unroll.c. + + * integrate.h: Replace `tree' use in definition with + `union tree_node *' so that tree.h does not have to be included when + this file is included. + + * integrate.c (initialize_for_inline): Pass additional argument, + the DECL_INITIAL (fndecl) tree, to gen_inline_header_rtx. Update + and correct comment. + (save_for_inline_copying): Copy the decl tree, so that virtual reg + instantiation, and loop unrolling, won't affect the saved tree. + (copy_decl_tree): New argument, functionbody, which distinguished + between calls from save_for_inline_copying and calls from + expand_inline_function. + (copy_rtx_and_substitute): Return orig instead of aborting when + inline_target is zero so that loop unrolling can use this code. + + * gcc.texinfo: Document the new optimization flags -funroll-loops + and -funroll-all-loops, the new dump option -dt, and the new named + pattern "decrement_and_branch_until_zero". + + * flags.h: Define two new flags, flag_unroll_loops and + flag_unroll_all_loops. + + * emit-rtl.c (gen_inline_header_rtx): New argument + original_decl_initial. Pass to gen_rtx call. + + * alliant.md, m68k.md: Name the pattern that uses the REG_NONNEG + note to "decrement_and_branch_until_zero". + + * Makefile.in: Add source file unroll.c and header file loop.h to + the cc1 dependencies. Add *.cse2 to the list of files deleted by + `make clean'. + +Thu Apr 4 16:13:37 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * varasm.c (assemble_constructor, assemble_destructor): New functions. + They use ASM_OUTPUT_CONSTRUCTOR and ASM_OUTPUT_DESTRUCTOR. + * cplus-decl2.c (finish_file): Use them. + + * reload.c (find_reloads): Pass location as outloc for output reload. + + * objc-actions.c (objc_class_id, synth_module_prologue): + Initialize new variable to hold identifier for "objc_class". + + * objc-actions.c (objc_comptypes): Allow assigning between types + id and Class without warning. + + * c-typeck.c (warn_for_assignment): When there is a type mismatch + in the hidden arguments of a message expression, don't print the + argument number as 0 or -1. Instead print the warning as would + be done for an explicit call to objc_msgSend (this should never + happen, but just in case). + + * emit-rtl.c (gen_lowpart): Reverse #if for CONST_DOUBLE case. + +Thu Apr 4 13:27:02 1991 Michael Meissner (meissner at osf.org) + + * hard-reg-set.h (SET_HARD_REG_BIT, CLEAR_HARD_REG_BIT, + TEST_HARD_REG_BIT): Use unsigned arithmetic to isolate the word and + bit number, which produces better optimized code. + +Thu Apr 4 07:34:17 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reorg.c (relax_delay_slots): Avoid adjusting LABEL_NUSES if the + insn is a conditional return. + + * reload1.c (reload): If we find that a replacement cannot be + done and that replacement now enables a secondary replacement, + this may disable a third replacement in some cases. + (eliminate_regs, case SET): Don't stop after we find the first + match when looking for modified registers. + + * combine.c (previous_num_undos): New var. + (try_combine): Set it after each call to subst. + When substituting I1 into I2, somtimes make a copy of PATTERN (i2). + (gen_rtx_combine): Start at PREVIOUS_NUM_UNDOS. + + * combine.c (can_combine_p): Start check for volatile references + after INSN, not at INSN. + + * combine.c (try_combine): When we find a split point, ensure + that I2 is a register. If it is of the wrong mode, change the + mode if we can, just like we do with CCmode registers. + (find_split_point): Don't split an extraction if it crosses the + boundary given by the field (i.e., a byte boundary if QImode). + Correct typo: Should generate LSHIFTRT, not LSHIFT. + (subst): Correctly test to see if we can change the mode of + a register for a MODE_CC comparison. + (distribute_notes): If a NOTE references a pseudo-register, + ensure it references the latest copy of that register. + When scanning for last use, don't stop at CALL_INSNs. + + * combine.c (expand_compound_operation): Don't get confused about + (zero_extend (asm_operands ..)) because of the VOIDmode ASM_OPERANDS. + (simplify_and_const_int): Ensure we do computations in proper mode. + Simplify ZERO_EXTRACT and ZERO_EXTEND when we have a PLUS. + (significant_bits): Don't call get_last_value on a SUBREG, just REG. + Correct significant bits for comparison operations. + (simplify_shift_const): When VAROP is logical, use proper mode when + computing shifted constant. + + * combine.c (gen_lowpart_for_combine): Call gen_lowpart if we have + a CONST_DOUBLE. + + * genconfig.c (walk_insn_part, main): Write a definition + for HAVE_lo_sum if a LO_SUM is present in the machine description. + + * combine.c (try_combine): If we have a PARALLEL of a SIGN_EXTEND + and a load of memory, split it into a load and SUBREG assignment. + (find_split_point): If we have LO_SUM for this machine, + split (mem (symbol_ref ..)) using HIGH and LO_SUM. + If we have operation with second operand constant, maybe we couldn't + fit the constant in the insn, so try to split there. + Move NOT to first operand so we'll try to split the other operand + first. + (subst): No reason to avoid making paradoxical SUBREGs and we miss + some optimizations if we don't. + Convert (lo_sum (high FOO) FOO) to FOO. + Convert (C1 + (x + C2) to (C1 - C2) - x. + Use distributive law in more places with logical operations. + (apply_distributive_law): Properly distribute IOR over XOR. + (simplify_shift_const): Simplify (ashift (plus ..) ...). + (simplify_comparison): Add code to remove extraneous AND + operations when comparing result of two comparisons on some machines. + Ignore bits not applicable in our mode. + Treat some SUBREGs as ZERO_EXTENDs. + Convert equality comparison of AND with sign bit into LT or GE + comparison. + + * combine.c (gen_binary, gen_unary): New functions. + (apply_distributive_law, simplify_shift_const): Use gen_binary. + +Wed Apr 3 16:15:17 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * Makefile.in (gnulib): Insert only .o files in combined archive. + (gnulib1.portable): Use $(HPXT). + * make-hp9k320g: Define HPXT. + + * From wilson@cygnus.com. + * sched.c (schedule_block): Delete previously unused variable last_q. + Correct handling of registers with multiple lifetimes within a single + block, always save lifetime info, and clear the appropriate bit in + old_live_regs. Delete now unused variable sched_reg_n_sets. + +Wed Apr 3 07:43:35 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * tm-romp.h (CONST_COSTS): All CONST_INTs are cost 0. Symbolic + values cost two insns. + + * function.c (fixup_var_refs_1): Correctly perform position + computation for bit extracts; disallow mode-dependent addresses. + (optimize_bit_field): Likewise. + Remove explicit mention of HImode and QImode by calling mode_for_size. + No need to check for offsettable_address_p; we call change_address + and are not called after reload; don't call adj_offsettable_operand. + * recog.c (validate_replace_rtx_1): Correct endian computation + and don't change mode of a MEM with a mode-dependent address. + + * expmed.c (expand_divmod): Try to figure out what mode will be used + and convert to that once at the beginning, rather than repeatedly, + since we may be writing jumps. + + * vax.md ({zero,sign}_extract patterns): Field width is QImode, not + SImode. + +Tue Apr 2 08:42:23 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (simplify_ternary_operation): Add argument for previous + mode of operand 0. + Don't do anything for extractions if bits don't fit in OP0_MODE. + Use OP0_mode instead of mode of OP0 for endian correction. + (fold_rtx): Pass new operand to simpllify_ternary operation. + * integrate.c (subst_constants): Add extra arg to call to + simplify_ternary_operation and call for rtx class 'b'. + * combine.c (find_split_point): Don't split an extract when the + bits are outside the mode of operand 0. + (subst): Pass new parameter to simplify_ternary operation and call + for rtx class 'b'. + (subst, case ZERO_EXTRACT): Don't change the mode of a MEM + if it is a mode-dependent address. + Correctly do endian adjustments so they are correct for fields that + go outside a byte boundary. + (subst, case {ZERO,SIGN}_EXTRACT): Don't adjust MEM here for non-dest + objects; already done in make_compound_operation. + (make_compound_operation): Rework code that makes extracts and + extends to correcty compute positions, taking into account the fact + that field can cross byte boundaries. Remove redundant adjustments. + Use mode_dependent_address_p to validate changing modes of MEM. + (simplify_shift_const): Check for mode-dependent address when + changing mode of a MEM. + (gen_lowpart_for_combine): Likewise. + + * expmed.c (expand_shift): Code to use extzv for logical right shift + had numerous assumptions about specific modes and did not validate + operands properly. + + * expr.c (expand_expr, case NOP_EXPR): If no target was specified, + use convert_to_mode instead of convert_move; this may return a SUBREG. + + * expr.c (do_jump): Conversion isn't NOP if it narrows the object. + If testing A & CONST and the result fits in a smaller mode, try + the compare there. + + * cse.c (simplify_binary_operation): If eliminating reference to + operand, verify that it has no side effects. + Add cases for "a | (~a)" and "a & (~a)". + + * recog.c (register_operand): Only call general_operand for + (subreg (mem ...) X), not all SUBREGs. + + * jump.c (jump_optimize): Remove needless incrementing of LABEL_NUSES + which can cause a dead label not to go away. + +Mon Apr 1 19:08:40 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (cse_insn): Add missing call to insert_regs. + +Mon Apr 1 18:21:33 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * optabs.c (init_optabs): Change #if to #ifdef. + + * loop.c (check_dbra_loop): Take out Feb 24 change. + +Sun Mar 31 22:43:39 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * final.c (insn_counter): New variable. + (final_scan_insn): Increment it. + (output_asm_insn): Use it for %=. + +Sun Mar 31 22:16:31 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * out-a29k.c (output_prolog): Correctly write stack size in tag word. + + * out-a29k.c (srcb_operand): If QImode, any constant is OK since + we only care about 8 bits. + (print_operand): Add %Q for QImode srcb values. + * a29k.md (QImode patterns): srcb's that accept constants should have + 'n' constraint, not 'I'; use %Q to output. + + * reload1.c (gen_input_reload): Properly generate reload when we are + adding a pseudo and a hard register. + + * cse.c (simplify_unary_operation): Don't use ffs. + +Sun Mar 31 20:59:52 1991 Micheal Tiemann (tiemann at pogo.gnu.ai.mit.edu) + + * gnulib1.c (perform_ash{l,r}si3): Fix typo that had these + performaces swapped. + +Sun Mar 31 13:35:50 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * rtl.h (FIND_REG_INC_NOTE): New macro. + * rtl.h (AUTO_INC_DEC): Define here. + * flow.c (AUTO_INC_DEC): Not here. + * combine.c (can_combine_p, try_combine): Use FIND_REG_INC_NOTE. + Make other scans for REG_INC notes conditional on AUTO_INC_DEC. + * final.c (final_scan_insn): Use FIND_REG_INC_NOTE. + * jump.c (delete_jump): Likewise. + * loop.c (get_condition): Likewise. + * reload.c (find_reloads_address_1, find_equiv_reg): Likewise. + * reload1.c (reload_as_needed): Likewise. + * reorg.c (delete_scheduled_jump, mark_set_resources): Likewise. + * global-alloc.c (global_conflicts): Likewise. + + * dbxout.c (dbxout_type): For integers, reals, and arrays, + use actual type number of int or char, in case those are not 1 and 2. + + * toplev.c (compile_file): Take out last change (regarding lang_init). + + * emit-rtl.c (sequence_element_free_list): Change data type. + (get_last_insn_anywhyere, add_insn_after): Finish last change. + + * expr.c (expand_builtin): Finish last change. + +Sat Mar 30 15:16:16 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * function.h (struct sequence_stack): New data type. + (sequence_stack): Declare variable. Use new data type. + * emit-rtl.c (get_last_insn_anywhere, add_insn_after): Adapt to that. + (start_sequence, end_sequence, in_sequence): Likewise. + (start_sequence): Allocate stack links as permanent. + (init_emit_once): Init sequence_stack here. + (init_emit): Not here. + * function.c (push_temp_slots, pop_temp_slots): + (expand_function_end): Use in_sequence. + (fixup_var_refs): Use new data type. + (put_var_into_stack): Don't declare sequence_stack. + + * function.c (expand_function_start): + Trace static chain properly past first link. + + * ns32k.md (andcbhi3, andcbqi3): Constraint shouldn't say commutative. + +Sat Mar 30 02:06:20 1991 North-Keys (erlkonig at apple-gunkies.gnu.ai.mit.edu) + + * c-decl.c (init_decl_processing): Fix typo `integer_tpe_node'. + * dbxout.c (dbxout-symbol): Added char * declaration for `name'. + * objc-actions.c (encode_array): Avoid returning a value. + +Fri Mar 29 15:59:22 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-decl.c (init_decl_processing): Define __builtin_constant_p. + * expr.c (expand_builtin): Implement it. + * tree.h (enum built_in_function): New alternative. + + * toplev.c (compile_file): Move lang_init call after debugger init. + + * gcc.c (default_compilers): Define __cplusplus for C++ code. + + * c-decl.c (start_function): Use 0 for name of result decl. + (value_identifier): Variable deleted. + + * dbxout.c (dbxout_type): Handle LANG_TYPE. + (dbxout_symbol): Handle RESULT_DECL. + Handle variables with constant values that are not output. + Use the mangled name when appropriate. + (dbxout_tags): Output equivalent typedef when appropriate. + (dbxout_function): Output the DECL_RESULT if it has a name. + + * varasm.c (assemble_variable): Delete calls to set_current_gdbfile. + +Thu Mar 28 16:14:13 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * gcc.c (main): Calculate basename_length to exclude last period. + + * optabs.c (expand_binop, expand_unop): + When widening, don't keep CONST_INT beyond a single word. + + * tm-vax.h (CHECK_FLOAT_VALUE): Change float max to ...444e+38. + + * Makefile.in (gnulib1, gnulib2.portable): + Make test of $$? normally succeed, not normally fail. + (gnulib1): Don't use -e in second loop. Test explicitly instead. + + * dbxout.c (lastfile): New static variable. + (dbxout_init): Initialize lastfile. + * final.c (lastfile): Deleted. + (init_final): Don't set lastfile. + + * final.c (set_current_gdbfile): Function deleted. + (output_source_line): Handling of GDB debugging info deleted. + (final_start_function, final_end_function): Likewise. + +Thu Mar 28 09:58:18 1991 Micheal Tiemann (tiemann at pogo.gnu.ai.mit.edu) + + * cplus-decl.h (decl_context): Add missing declaration for BITFIELD. + + * tm-sparc.h (CC1_SPEC): Change to handle new interpretation of -O2. + (OPTIMIZATION_OPTIONS): Use this macro to control default expensive + optimizations. + (MODES_TIABLE_P): Use GET_MODE_CLASS to simplify this macro. + (FUNCTION_ARG,FUNCTION_ARG_PARTIAL_NREGS): Make sure TYPE is nonzero + before we use it. + (FUNCTION_BLOCK_PROFILER): Fix a bug in the asm code. + (EXTRA_CONSTRAINT): For 'S' constraint, if OP is a register, make + sure it's not a pseudo. Also, change call to `memory_address_p' to + `strict _memory_address_p'. Both of these are for the strict cases. + (SLOW_BYTE_ACCESS): Try going with this set 1. + * sparc.md: Take advantage of new combiner to handle signed bitfield + comparisons and signed sub-word comparisons. + Added peepholes for doing subword memory tests and operations. + +Thu Mar 28 09:43:30 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * emit-rtl.c (start_sequence, gen_sequence): Ensure we allocate rtl + on saveable_obstack since we will be saving it and we may be called + from an optimizer that will reuse allocated memory in current_obstack. + +Wed Mar 27 18:46:27 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * toplev.c (main): Print version with -version, regardless of + -quiet. + + * Makefile.in (gnulib, gnulib2.ready): Put `-' before `if'. + + * make-hp9k320, make-hp9k320g (CC, OLDCC): Delete -lsetjmp. + Add -Wc,-Nw2000. + + * dbxout.c (dbxout_source_file): New name for fn moved from final.c. + * final.c (output_source_file): Moved to dbxout.c. Callers changed. + (output_source_line): Call dbxout_source_file. + +Wed Mar 27 11:09:13 1991 Micheal Tiemann (tiemann at pogo.gnu.ai.mit.edu) + + * version.c: Bumped to version 1.92. + + * final.c (output_source_{file,line}): Fix bug in new handling of + "Ltext". + + * cplus-cvt.c (build_up_reference): Handle BIND_EXPR. + + * Makefile.in (cplus-lex.o): depend on cplus-input.c. + * cplus-input.c: New file. + + * cplus-method.c (do_inline_function_hair): Call a different + `prepare_inline', and don't deal with pending_inlines here. + * cplus-lex.c (do_pending_inlines): Deal with pending_inlines + here... + (reinit_parse_for_method): ...and here. + + * cplus-decl.c (grok_ctor_properties): Use TYPE_NAME_STRING where + appropriate. Also, don't assume that CURRENT_CLASS_TYPE is what we + use for error message; use CTYPE instead. + + * cplus-type2.c (digest_init): Strip NON_LVALUE_EXPRs. + + * cplus-tree.c (__eprintf): Added this function from gnulib2 until + gnulib configuration is worked out. + + * cplus-parse.y (member_init): Call do_member_init. Previous code + was wrong (using a goto to factor common code) because the parse + stack was different in the two contexts. + * cplus-init.c (do_member_init): New function. + + * cplus-typeck.c (build_compound_expr): Convert arrays to pointers. + (build_c_cast): Warn about possible alignment problems. + +Wed Mar 27 05:55:32 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reload.c (find_reloads): Disallow a PLUS as an operand even if + "g" is in the constraint; this is only valid for "p". + +Tue Mar 26 06:46:48 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * local-alloc.c (block_alloc): Have insn numbers start at 1, not 2. + + * rtlanal.c (replace_regs): Move to here; add new parameter. + * loop.c (replace_regs): Delete from here. + (move_movables, strength_reduce): Pass new parameter to replace_regs. + * jump.c (duplicate_loop_exit_test): Make new pseudos for pseudos + used only in loop exit test; this prevents unnecessay sharing + between code inside and outside of loop. + * toplev.c (rest_of_compilation): Call reg_scan before jump. + + * combine.c (distribute_notes): If we are searching back for the last + use of a register I3 and I2 no longer use and the last use is a SET + of that register, place a REG_UNUSED note instead of a REG_DEAD note. + No longer need handle REG_DEAD note for output of I3; it will now be + a REG_UNUSED note. + + * combine.c (try_combine): If I3SRC is a register and I2 is a + multi-output insn, see if we can replace one of the outputs with + I3DEST. If so, move LOG_LINKS pointing at the other outputs to + now point to I3 instead of I2. + + * rtlanal.c (single_set): Return 0 if not an insn. + Only ignore SET with unused output if it has no side effects. + (side_effects_p): New function. + * combine.c (can_combine_p): Only ignore SET with unused output if + it has no side effect. + Don't extend the life of a hard register. + (try_combine): Always give up if I1 or I2 used reg inc'd in I3. + (significant_bits): Return mode mask if mode wider than host int. + Don't get confused by (zero_extend (const_int ..)) and similar where + the inner mode is VOIDmode. + Arithmetic operations now always have same modes on operands as + on the result. + + * jump.c (jump_optimize): Set this_is_{simple,cond}jump at the start + of loop, not in middle, and use consistently. + Use can_reverse_comparison_p in case where we make scc insn. + Don't use can_reverse_comparison_p when we call invert_jump. + Use indirect_jump instead of indirect_exp. + Check invert_jump's result before making any other changes; handle + failure. + Simplify code that looks for and deletes USE insns. + (jump_back_p): Call can_reverse_comparison_p only if we have to + reverse the comparison. + (can_reverse_comparison_p): Accept comparison expression and insn + it comes from. + Rework to be more general now that we have MODE_CC and tighten + up a bit. + (invert_jump): Allow invert_exp and redirect_jump to fail. + (invert_exp): Only invert jump, don't change target. + If can reverse comparison code, try it using validate_change. + If that doesn't work, swap the arms of the IF_THEN_ELSE. If that + doesn't work, return 0. + (redirect_exp): Now static. + * expr.c (do_jump_for_compare): Call invert_jump to invert jump + to false label after emitting jump; if this fails, convert to + jump around unconditional jump to false label. + (do_store_flag): Set to 1 first, then branch, then set to 0. This + avoids inverting branches. + * reorg.c (optimize_skip, relax_delay_slots): Always allow invert_jump + to fail. + * rtlanal.c (single_set): Return 0 if not INSN, CALL_INSN, + or JUMP_INSN. + + * reload1.c (eliminate_regs): If any eliminable regs occur in a USE, + eliminate them. + +Tue Mar 26 00:09:18 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * c-decl.c (implicitly_declare): Always make implicit decl permanent. + +Mon Mar 25 16:38:14 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * genextract.c (walk_rtx): Record operand numbers that are seen. + (gen_insn): If there are gaps in operand numbers, make code to store + something for the operands not used in this pattern. + (main): Initialize data structures. + + * c-typeck.c (initializer_constant_valid_p): + Always allow length-preserving conversions between integer types. + + * regclass.c (reg_class_record): Return right away if operand is 0. + + * c-decl.c (duplicate_decls): Warn if declare fcn inline after calls. + + * reload.c (combine_reloads): + Test reg_overlap_mentioned_p in both directions. + +Mon Mar 25 15:05:29 1991 Tom Wood (wood at dg-rtp.dg.com) + + * genoutput.c (output_epilogue): Choose a name for an unnamed + pattern as an offset from the closest named pattern. Define + `insn_name_ptr' as a pointer to `insn_name' for use by print_rtx. + * final.c (output_asm_insn): Use the pattern name chosen by + genoutput and output the INSN_UID as well. + * rtl.c (insn_name_ptr): Provide an alternate definition to avoid + link errors when rtl.o is not linked with insn-output.o. + (print_rtx): When printing the INSN_CODE field of an insn, print + the name if it is available. + +Mon Mar 25 09:39:43 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * regs.h (reg_first_use): Deleted. + * rtl.h (REG_UNSET): Deleted. + (REG_UNUSED): New note. + * combine.c (combine_instructions): Delete loop fixing up + reg_first_use. + (can_combine_p): Ignore a branch of a PARALLEL if its output is + never used. + (move_deaths): Don't update reg_first_use. + (distribute_notes): Don't handle REG_UNSET; add code for REG_UNUSED. + * flow.c (reg_first_use): Deleted. + (life_analysis): Restore code that marks vars live at start of function + as globals. These are registers that were never set. + (allocate_for_life_analysis): Don't allocate reg_first_use. + (propagate_block): Search for cc0-setting insn with prev_nonnote_insn. + (mark_set_1): Don't set reg_first_use. + If register is never used, make REG_UNUSED note, not REG_DEAD. + (mark_used_regs): Don't set reg_first_use. + * global-alloc.c (global-conflicts): Dead outputs are now denoted by + REG_UNUSED notes, not REG_DEAD. + * reload.c (find_dummy_reload): Delete test of REG_UNSET; add test + of REG_UNUSED. + (find_equiv_reg): Don't re-use an output marked as REG_UNUSED; + we want these notes to be accurate; this would rarely win anyway. + * reload1.c (emit_reload_insns): Test REG_UNUSED to see if an + output won't be used any more. + * reorg.c (mark_target_live_regs): Use REG_UNUSED notes to kill + registers dead after an insn. + * rtl.c (reg_note_name): Delete REG_UNSET, add REG_UNUSED. + * rtlanal.c (single_set): Ignore a SET whose output has a REG_UNUSED + note. + * sched.c (update_first_use): Deleted. + (update_links): No need to call update_first_use. + + * local-alloc.c: Major changes to use REG_UNUSED notes, make + handling of only-set registers more consistent, and allow + two consecutive CLOBBERs to share a register. Also, avoid loops + over all register each basic block; eliminating these make local-alloc + three times faster! + Quantity numbers now start at zero. + (qty_first_reg, reg_next_in_qty): New variables. + (qty_clobber): No longer needed. + (reg_qty): -1 if register cannot be allocated by local-alloc. + Now undefined for hard registers. + (reg_offset): Now char *. + (call_seen): Deleted, never used. + (regs_live_at): Now two entries per insn. + (alloc_qty): Initialize chain of register in quantity. + (local_alloc): Remove all per-block loops over registers. + Only allocate qty_... vars for max_reg - FIRST_PSEUDO_REGISTER. + Initialize reg_qty once per function. + Don't initialize qty_... vars that are always set before use. + (block_alloc): Delete insn_map, max_uid, and call_used. + Insn numbers start at 1 and we have two entries in regs_live_at + for each insn. + Search for REG_NO_CONFLICT block when we see a CLOBBER insn; this + avoids having already seen sets to the output register. + Call wipe_dead_reg for anything in a REG_UNUSED note. + Delete references to reg_first_use. + Don't check for invalid birth and death here. + Don't call qsort if we have 0 or 1 quantities. + Find all registers for a quantity using reg_next_in_qty chain instead + of looping over all pseudos. + (combine_regs): Refine tests to agree with new conventions. + Never tie pseudos if SREG already has a quantity assigned. + When updating size, use reg_next_in_qty instead of looping over + all registers. + (reg_is_set): Just call reg_is_born. Where it is born depends on + whether we have a CLOBBER or not. Birth location is now twice + the insn number. + (reg_is_born): Handle case when a hard reg is born before the + current insn. + Show we don't know the death location. + (wipe_dead_reg): Parameters are now just register and an in/out flag. + Death locations are now twice the insn number. + Support hard regs that die immediately after current insn. + Don't make REG_UNSET notes. + (find_free_reg): Validate BIRTH and DEATH here. + We no longer have qty_clobber. + (post_mark_life): Eliminate CLOBBER parameter. + (no_conflict_p): Now passed CLOBBER at start of block. Return 0 if + can't find death note or if R1 is a hard register. + + * m68k.md (divsi3, udivsi3): Remove patterns. Using divmodsi4 and + udivmodsi4 produces better code. + (divmodsi4, udivmodsi4): If remainder isn't needed, use divsl/divul + instead of divsll/divull. + + * integrate.c (expand_inline_function): Remove change of March 20th. + Instead, expand args in two passes. First, expand all that go + into registers. Then do those in memory with store_expr. + + * integrate.c (initialize_for_inline): Put the original copy of the + address into ARG_VECTOR; the new one will be modified. + + * reload.c (push_reload): Handle paradoxical SUBREGs on an output + as well as an input. + + * flow.c (mark_label_ref): Don't blow up when X is 0. + + * combine.c (make_compound_operation): Fix typos; result of + exact_log2 is interesting if >=0. + + * a29k.md (store_multiple): Allow gen_store_multiple{_no,}_bug to fail; + we fail if they do. + + * reorg.c (emit_delay_sequence): Record that we deleted a BARRIER + and restore it precisely on those occaisions. + +Sun Mar 24 21:19:55 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * gcc.c (xmalloc, xrealloc): Change error message. + * toplev.c (various): Change error messages. + + * final.c (final_scan_insn): Handle ASM_OUTPUT_LOOP_ALIGN. + + * calls.c (emit_call_1): Pass number of bytes to pop to call_pop. + * vax.md (call_pop, call_value_pop): Use that arg. + +Sat Mar 23 23:28:59 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * Makefile.in (version): Run awk, not gcc, to get this value. + +Sat Mar 23 18:04:23 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (simplify_unary_operation): Add missing cases for ABS and FFS. + + * alliant.md: Eliminate unneeded patterns: HImode zero_extract, + (set (cc0 (subreg ...))), (set (cc0) (and ...)), + (and (zero_extend ...) ...), shift right of 24 and 16. + Use alternatives to select assembler template when possible. + Use const_int_operand instead of immediate_operand when + possible to avoid explicit test for CONST_INT. + Write add-and-branch patterns with PLUS removed, the way combine + produces them. + + * rtlanal.c (refers_to_regno_p): If X is a SUBREG of a hard + register, treat it as if it were the appropriate register. + CLOBBER doesn't refer to anything. + + * final.c (final_scan_insn): Use prev_nonnote_insn, not PREV_INSN, + to find cc0-setting insn from cc0-using insn. + + * global-alloc.c (find_reg): Don't look for other registers to + renumber unless we know that we are sharing registers. + + * emit-rtl.c (end_sequence): Fix typo that prevented speedup of + Dec 26th from doing anything. + + * toplev.c (do_abort): New function, just calls abort. + (main): Set lang_expand_expr to address of do_abort; abort might be + a macro that is more than just a function name. + + * cse.c: (qty_... variables): Refined to be undefined for indices + less than MAX_REG. Thus, we need not intialize them at the start + of a basic block and can instead inialize a quantity as we create it. + (reg_{next,prev}_eqv): These variables will now be defined only when + reg_qty[N] != N and hence need not be initialized every block either. + (new_basic_block): Need not initialize reg_rtx for new block; the + only time we can inherit values from previous blocks is for hard + regs and it doesn't matter in that case. + + * c-parse.y (yylex): Avoid use of size_t; it may not be defined. + Cast alloca to (char *). + + * out-romp.c (update_cc): cc_status.value[12] can also be a COMPARE, + so use reg_overlap_mentioned_p to see if an insn that modifies a + register invalidates cc0. + + * reorg.c (link_cc0_insns): If next insn is a SEQUENCE, the insn + using cc0 is the first insn in the sequence. + (mark_target_live_regs): Don't assume that a REG_DEAD note always + refers to a register. + +Sat Mar 23 15:35:59 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * reload1.c (reload_reg_free_before_p): + An input reload is use before an output or output address reload. + + * genoutput.c (validate_insn_alternatives): New function. + Loop over insn's alternatives to find out how many + alternatives the insn pattern is to support. Verify that if + any alternatives are specified for a given operand that the + number of alternatives match the numer of alternatives for + this insn. + (gen_{insn,peephole,expand,split}): Call + `validate_insn_alternatives' after scanning the insn. This + sets up the value N_ALTERNATIVES for the insn so that + `process_template' can check that the number of alternitves + given matches the number of asm choices for `@' constructs. + +Sat Mar 23 08:09:57 1991 Michael Meissner (meissner at osf.org) + + * dbxout.c (toplevel, dbxout_init): Instead of always using `Ltext' + as the label at the beginning of the text region, properly localize + it, so that machines which do not put leading underscores in front + of external names do not have a problem if the user uses `Ltext'. + (dbxout_init): Call text_section before putting out localized + `Ltext', in case ASM_FILE_START put us into a different section. + +Fri Mar 22 19:26:23 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * a29k.md (jumpfdec): Simplify pattern to match what combine will + produce; remove reversed pattern. + * out-a29k.c (gen_reg_operand): Speed up by not calling + register_operand; check register number ourself. + + * out-romp.c (update_cc, case CC_COMPARE): Call CC_STATUS_INIT. + * romp.md: In pattern that sets cc0 and copies a register to another + register, allow the output to be in memory so that we don't get an + output reload, which will cause problems. + + * varasm.c (assemble_variable): Ensure DECL_INITIAL is non-zero + before we reference it; it might be zero if -fno-common. + +Fri Mar 22 16:11:35 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * toplev.c (abort): Don't declare if defined as macro. + +Fri Mar 22 11:49:43 1991 Tom Wood (wood at dg-rtp.dg.com) + + * m88k.md (bxxu): Don't attempt to use bcnd. + (umulsi3, ashift/and): Remove these patterns. + (dummy): This must be a define_expand. + * out-m88k.c (m88k_handle_pragma_token): Handle #pragma weak. + * tm-m88k.h, tm-m88kdgux.h, tm-m88ksvr4.h, tm-v88r32.h: Various + changes to support SVR4, including support for #pragma weak. + (SLOW_BYTE_ACCESS): Better code if this is true. + +Thu Mar 21 09:15:47 1991 Tom Wood (wood at gen-rtx) + + * c-parse.y (MULTIBYTE_CHARS): New macro. + (init_lex): Change to the native locale. + (yylex): Process wide character literals and wide character string + literals using mbtowc and mbstowcs based on MULTIBYTE_CHARS. + +Thu Mar 21 15:46:45 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * rtlanal.c (dead_or_set_p): A register is dead if it is assigned + via a SUBREG that references the all the words in the register. + + * tm-vax.h (CONST_OK_FOR_LETTER_P): Define `I' to be constant zero. + (CONST_DOUBLE_OK_FOR_LETTER_P): Define `G' to be floating zero. + (CONST_COSTS): +/- 1 should be very cheap due to decl/inc/aob/sob. + (PRINT_OPERAND): Add `P', `N', `H', and `B'. + * vax.md: Rework many patterns to avoid C code for output template; + use "@" construct whenever possible. + Use INSN_DELETED_P. + Remove extendsidi2; the supplied pattern does exactly what convert_move + will do when the pattern is not present. + Use constm1_rtx to check for constant of -1. + Add mulsidi3 and related add-multiply pattern for emul insn. + Use const_int_operand as predicate instead of checking for CONST_INT. + Remove unneeded (set (pc) (if_then_else (ne (and ...) ...) ...)) + patterns. + Merge jlbs and jbs and similarly for jlbc and jbc. + Remove unneeded reverse branch patterns for above insns. + Rewrite patterns for add-and-branch insns to take into account + simplifications done by combine and remove reversed cases. + Convert peepholes for optimizing extzv followed or preceeded by andl + into patterns for a single insn. + +Thu Mar 21 15:46:21 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * toplev.c (abort): Declare it. + +Thu Mar 21 08:16:12 1991 Michael Meissner (meissner at osf.org) + + * va-mips.h (whole file): Replace with the 1.39 version of this + file, which was a total rewrite of the 1.37.1 version. Add + primitive support for 2.00. + +Wed Mar 20 18:31:42 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * jump.c (duplicate_loop_exit_test): Make copy of contents of + register note; if it was a REG_EQUAL note, it might have been an + arbitrary expression and sharing it can cause problems in cse. + + * rtl.def (UMULT): Remove unsigned multiply code. + * combine.c (subst, significant_bits): Remove code UMULT and + support for indicating widening multiply with different modes + on the MULT operation vs. its operands. + * cse.c (simplify_binary_operation): Remove support for widening + multiply. + (rtx_code, exp_equiv_p, simplify_binary_operation, cse_insn): Remove + code UMULT. + * function.c (instantiate_virtual_regs_1): Likewise. + * reload1.c (eliminate_regs): Likewise. + * local-alloc.c (block_alloc): Likewise; replace with GET_RTX_CLASS. + * loop.c (simplify_giv_expr, expr_benefit): Remove code UMULT + and support for widening multiply. + * optabs.c (init_optabs): Set code of widening multiply tables + to UNKNOWN. + + * a29k.md (mulsidi2, umulsidi2): Rewrite using SIGN_EXTEND and + ZERO_EXTEND. Also fix typo in SUBREG_WORD when splitting. + * tm-alliant.h, tm-m68k.h (NOTICE_UPDATE_CC): Remove code UMULT. + * alliant.md, m68.md (mulhisi3, umulhisi3): Rewrite using + SIGN_EXTEND and ZERO_EXTEND. + (divhisi3, udivhisi3, modhisi3, umodhisi3): Rewrite using TRUNCATE. + * alliant.md, ns32k.md (umulsi3, umulhi3, umulqi3): Remove unneeded + patterns that use UMULT. + * ns32k.md (umulsidi3): Rewrite using ZERO_EXTEND. + + * tm-alliant.h (NOTICE_UPDATE_CC): MOD and (trunc (mod ...)) + clobber CC. + * alliant.md (mod*, umod*): No longer need CC_STATUS_INIT. + + * recog.c: Include insn-attr.h. + (general_operand): If we have insn scheduling, don't allow paradoxical + SUBREGs since they can prevent scheduling memory references; they + aren't helpful on RISCs anyway and can cause poor register allocation. + * Makefile.in (recog.o): Includes insn-attr.h. + + * cse.c (COST): A register only in NO_REGS isn't a specially-cheap reg. + (simplify_unary_operation, case {ZERO,SIGN}_EXTEND): If OP_MODE was + given as VOIDmode, use MODE; allow mode size of HOST_BITS_PER_INT. + (cse_insn): Don't make SET_SRC equal SET_DEST if doing so will cause + two registers to be live containing the same value. + (cse_end_of_basic_block): Count SETs in CALL_INSNs and JUMP_INSNs. + +Wed Mar 20 15:40:48 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * gcc.c (MD_EXEC_PREFIX, MD_STARTFILE_PREFIX): New macros. + (md_exec_prefix, md_startfile_prefix): New variables. + (process_command): Put those prefixes on the paths. + + * toplev.c (main): Use abort, not fancy_abort. + + * integrate.c (expand_inline_function): Use emit_block_move + to copy BLKmode parm value. Save size and alignment for this. + + * gnulib2.c (__builtin_saveregs)[MIPS]: Go to text section. + + * final.c (final_scan_insn): Don't go to text after jump-tab label. + +Tue Mar 19 21:27:09 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * tm-a29k.h (SETUP_INCOMING_VARARGS): Always write registers to + 0(ap), no matter how many named args are present. + + * combine.c (subst): In IF_THEN_ELSE, canonicalize to put the (pc) + in the second operand if we can reverse the comparison. + (significant_bits): Support TRUNCATE and SIGN_EXTEND. + + * tm-romp.h (CC_UNSIGNED): New flag for cc_status. + * out-romp.c (update_cc, case CC_COMPARE): Record the operands of the + compare and mark whether the test will be signed or unsigned. + (restore_compare_p): New function. + * romp.md (conditional branch and return patterns): Use new + restore_compare_p to see if we need to tell final to reinclude + deleted compare insn. + + * output.h (const_int_operand): Define. + * recog.c (const_int_operand): New function. + * out-a29k.c, out-romp.c, out-rs6000.c (const_int_operand): Remove from + these. + + * tree.c (rtl_in_saveable_obstack): New function. + * varasm.c (immed_double_const, immed_real_const_1): Ensure that things + that get placed on the chain are always put into saveable_obstack. + +Tue Mar 19 17:21:30 1991 Richard Stallman (rms at mole.gnu.ai.mit.edu) + + * stddef.h (wchar_t): New typedef. + + * out-sparc.c (output_block_move): Handle NO_UNDERSCORES syntax. + + * tm-pbd.h, xm-pbd.h: New files. + + * toplev.c (report_error_function): Don't crash if between functions. + +Tue Mar 19 12:58:13 1991 Michael Tiemann (tiemann at cygnus.com) + + * sched.c (memrefs_conflict_p): C was being used as offset for X, + not for Y. Flipping + and - in offset uses cleared up this problem. + ({true,anti,output}_dependence): Add declaration for INSN. + (order_calls): Interface changed; now returns void. All callers + changed. + (sched_analyze_{1,2}): Make dependence between calls and + call-clobbered registers explicit. + (sched_analyze): Track last_function_call_not_const. + (sched_note_set): New parameter DEATH says whether X is marked for + death. Also, look through SUBREGs and extractions. + (rank_for_schedule): Stabilize for qsort. + (attach_deaths): We should not end up with more REG_DEAD notes than + we started with, so abort if we run out early. + (attach_deaths_insn): Handle more complicated cases of registers + dying in insns. + (unlink_notes): Work from back-to-front instead of front-to-back. + (new_sometimes_live): Fix code that looks for an element already in + the table. + (schedule_block): New variable TAIL_PRIORITY used to help determine + max IPC of scheduled code. Also, for now we analyze (schedule) all + blocks, even ones which won't benfit from scheduling. This is + necessary to keep register live info correct, but has the + disadvantage of screwing *all* debug info, not just for the blocks + that were scheduled. + (update_links): Fix complicated code that was to be a simple + head-cons to be a simple head-cons. + (schedule_insns): Update REG_LIVE_LENGTH and REG_N_CALLS_CROSSED + after scheduling. + + * sparc.md (cmpdf): Define an expand pattern for this. (Dropped by + mistake when converted from old-style to new-style condition codes). + + * out-sparc.c (singlemove_string): Catch case where `sethi' can be + used instead of `mov'. + + * gcc.texinfo (Optimize Options): Add documentation about the + `-finline' option (actually, the `-fno-inline' option). + + * out-sparc.c (output_block_move): Use `rtx_alloc' instead of + `gen_rtx' to cons a CONST_INT whose INTVAL we can change. + + * toplev.c (main): Recognize all -O strings (i.e. -O3, -O69), not + just -O and -O2. + +Mon Mar 18 22:30:21 1991 Richard Stallman (rms@mole.ai.mit.edu) + + * expr.c (expand_expr): For TRUTH_ANDIF_EXPR, don't use hard target + if not optimizing. + + * combine.c: Fix some comments; reorder the variable declarations. + +Mon Mar 18 12:07:03 1991 Matthew Self (mself@next.com) + + * tm-next.h (WORD_SWITCH_TAKES_ARG): Return number of args taken. + + * tm-next.h (CPLUSPLUS): Deleted (obsolete). + + * out-next.c (flag_no_mach_text_sections, handle_pragma): + Handle #pragma CC_NO_MACH_TEXT_SECTIONS. + +Mon Mar 18 12:12:13 1991 Richard Stallman (rms at goldman) + + * cplus-pt.c: Renamed from cplus-template.c. + * Makefile.in (cplus-pt.o): New target. + + * c-typeck.c (initializer_constant_valid_p): + Allow casts that change width only for explicit values. + * tree.c (really_constant_p): New function. + * expr.c (expand_expr): Handle MINUS_EXPR with EXPAND_SUM. + + * tm-m68k.h (FUNCTION_EXTRA_EPILOGUE): Don't normally define this. + * out-m68k.c (use_return_insn): Don't look at FUNCTION_EXTRA_EPILOGUE. + + * out-sparc.c (normal_comp_operator): Replace comparison_code_p. + +Sun Mar 17 22:53:25 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * m68k.md: Delete patterns now converted by combine to simpler + patterns or otherwise obsolete. Specifically: ZERO_EXTRACT from + an HImode object, setting cc0 to SUBREG or AND, umulhi3, umulsi3, + AND of a ZERO_EXTRACT, shifts of 24 and 16 from MEM, and patterns with + constants as first operand of comparison operator. + Remove COMPARE except as a SET_SRC. + + * alliant.md, tahoe.md, rs6000.md: Remove COMPARE except as a SET_SRC. + + * flags.h (flag_combine_regs): Deleted. + * toplev.c: Likewise. + * tm-a29k.h, tm-romp.h, tm-rs6000.h (OVERRIDE_OPTIONS): No longer + turn on flag_combine_regs. + + * tm-romp.h, tm-rs6000.h (SLOW_BYTE_ACCESS): Set to 1. + + * Makefile.in (combine.o): Include insn-codes.h and insn-attr.h. + + * combine.c: Major rework to support many more simplifications in + a more regular manner and support combining three insns into two. + The most significant changes are the following: + (subst): Remove simplifications involving ZERO_EXTRACT, SIGN_EXTRACT, + ZERO_EXTEND, SIGN_EXTEND, AND, and shifts. + Call new routines below; in the case of comparisons, handle call + find_next_use if we need to change the comparison code or the + particular MODE_CC mode required. + No need to ever change ASHIFT to MULT here. + (expand_compound_operation): New function to convert + {ZERO,SIGN}_{EXTRACT,EXTEND} into the appropriate pair of shifts. + (make_compound_operation): New function to make + {ZERO,SIGN}_{EXTRACT,EXTEND} operations from shifts and ANDs. + If we are on a machine (like a Vax) that has only arithmetic shifts, + convert logical to arithmetic shifts when it doesn't matter + which shift is used (simplify_shift_const canonicalizes to + logical shifts). + If inside an address, convert ASHIFT to MULT. + (significant_bits): New function to determine which bits of + a value are known to be zero. + (simplify_and_const_int): Use significant_bits. + Call expand_compound_operation when required. + Handle AND of an ASHIFTRT with a constant. + Don't make ZERO_{EXTEND,EXTRACT} here. + (simplify_shift_const): New function to simplify a shift of an + an object by a constant integer. + (gen_lowpart_for_combine): When applied to a comparison operator, + return comparison operator in requested mode. + (simplify_set_cc0_and): Deleted. + (try_combine): No longer call simplify_set_cc0_and. + (reversible_comparison_p): New function. + (simplify_comparison): New function. + + (combine_instructions): Allocate and initialize new vars + reg_last_set_{table_tick,label,invalid}. + (update_table_tick, record_value_for_reg): New functions. + (get_last_value_validate, get_last_value): New functions. + (record_dead_and_set_regs): Call record_value_for_reg. + + (find_split_point): New function to locate a place where a complex + pattern can be split into two insns. + (try_combine): If we are combining three insns and can't recognize the + new pattern, try to split it. + Call new functions below to update insn status. + Return insn at which to continue scan. + (adjacent_insns_p, add_links, remove_links): Deleted. + (add_incs, add_no_conflicts, remove_death, move_deaths_2): Deleted. + (move_deaths): Generalize to include movements in both directions. + Update reg_first_use when we make an earlier use. + (distribute_notes, distribute_links): New functions. + (combine_instructions): No longer need check for LOG_LINKS + pointing at a NOTE. + Rescan from location indicated by try_combine, if any, when + combining three insns. + Update reg_first_use if we moved a use to a later insn. + + (try_distrib): Deleted. + (apply_distributive_law): New function, contains code from old + try_distrib. + (subst): Call apply_distributive_law for applicable operations. + Try to apply associative law. + (combine_instructions): No longer call try_distrib. + (dump_combine_stats, dump_combine_total_stats, combine_instructions): + No longer count distributer statistics. + + (can_combine_p): New function to see if I2 or I1 is combinable. + Be more precise about when we can combine insns involving cc0. + Eliminate -fcombine-regs; always do it. + (try_combine): + Call can_combine_p to validate I2 and I1. + If -fexpensive-optimizations, try to simplify I1 or I2. + Handle (set (foo) (const_int 0)) followed by a STRICT_LOW_PART + assignment to FOO as a ZERO_EXTEND. + (subst): Quit very early if X is a root node (like PC0). + Remove most canonicalizations done in first switch statement; now + done elsewhere. + Call simplify_{unary,binary,ternary}_operation. + Add cases involving logical and arithmetic operations applied + to comparison operators or values with only one significant bit. + Add more cases involving ABS since comparisons returning values + can be done with ABS. + Avoid generating (const (const ...) ...). + Convert (xmult (x_extend ...) ...) to a widening multiply. + + (gen_rtx_combine): New function to search for an operation in + undobuf. Many callers to gen_rtx changed to call this function. + (copy_substitutions): Only copy a substitution if it was placed into + more than one location. + +Sun Mar 17 17:26:09 1991 Richard Stallman (rms@mole.ai.mit.edu) + + * c-common.c (shorten_compare): Warn for (unsigned char) == -1. + + * final.c (final_scan_insn): Set debug_insn before first output. + (output_asm_insn): Clear it here. + + * expr.c (do_jump): Don't try to split non-integers. + + * fixincludes (dnetdb.h): Fix missing semi in nodeent. + (rusers.h): Code to fix this file was duplicated. + + * toplev.c (decl_printable_name): Now given an extra arg. + (decl_name): Accept that arg. + (announce_function, report_error_function): Pass that arg. + (error_with_decl, warning_with_decl): Likewise. + + * dbxout.c (getwd) [USG]: Define as macro. + + * c-decl.c (init_decl_processing): Indicate byte alignment for void. + + * expr.c (do_jump_by_parts_*): Compute nwords from compare arg. + Pass 0 as size and alignment to compare_from_rtx. + (do_jump_by_parts_greater): Compare high word first. + Handle unsigned compares properly. + Fix logic for dropping through versus failing. + + * expr.c (expand_builtin): Change cmpstrsi4 to cmpstrsi as in optabs.c. + + * c-common.c (truthvalue_conversion): Handle ptr vs int in MINUS_EXPR. + +Sun Mar 17 15:43:48 1991 Matthew Self (mself@next.com) + + Allow multiple return points in some framless functions (2/2/91): + + * m68k.md (return): New insn pattern for rts (and rtd). + + * tm-m68k.h (FUNCTION_PROLOGUE, FUNCTION_EPILOGUE, + USE_RETURN_INSN): Call new functions to avoid giant macros + which are hard to edit. + + * out-m68k.c (output_function_prologue, + output_function_epilogue): New functions. + + * out-m68k.c (use_return_insn): New function. Determines + whether the epilogue will consist of a single insn. Some + code was duplicated from output_function_epilogue. There + should be probably a new layout routine to do this common + work. Also #include "flags.h". + + *out-m68k.c (output_function_epilogue): Don't output + anything if the epilogue was output as RTL. We detect this + by the barrier insn which is always placed after a return + insn. This machine-independent test should probably be moved + back into final.c and removed from out-sparc.c and out-m88k.c. + + * out-next.c: Don't #include "flags.h". + +Sun Mar 17 00:07:20 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * genemit.c (gen_exp): Support constm1_rtx. + * genrecog.c (add_to_sequence): Likewise. + +Sat Mar 16 17:26:58 1991 Richard Stallman (rms@mole.ai.mit.edu) + + * c-lang.c (maybe_building_objc_message_expr): New dummy function. + * c-typeck.c (warn_for_assignment): Use it. + + * toplev.c (compile_file): Write out all static consts that are used. + +Sat Mar 16 14:08:12 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * integrate.c (subst_constants): Don't replace registers in USE or + CLOBBER expressions. + + * genattrtab.c (main): Properly set up a default DEFINE_ASM_ATTRIBUTES. + + * cse.c (cse_insn): Correctly check for a hash table element equal to + the destination of a SET. + +Fri Mar 15 16:55:32 1991 Ron Guilmette (rfg at pepper.ncd.com) + + * Makefile.in (OBJS): Added dwarfout.o to list of things to be + built. + + * Makefile.in (dwarfout.o): Added this rule. + + * dwarfout.c (FT_*_long_long): Added default definitions for all of + these extended fundamental type codes to cater to plain vanilla + <dwarf.h> file which do not define codes for these fundamental types. + + * dwarfout.c (TREE_UID): Added a local definition of this macro + because gcc v2 no longer provides a definition for it and because + dwarfout.c needs some way of getting a unique numeric code for each + type. + + * dwarfout.c (CLASSTYPE_*): Added some local default definitions + for these macros in order to get around the fact that they are + currently defined only in cplus-tree.h (and rms wants dwarfout.c + to be language independent). + + * dwarfout.c (BITFIELD_OFFSET_*): Added some local macros to help + compute various quantities relating to bitfield offsets. + + * dwarfout.c (location_attribute): Changed code which outputs location + attributes for bitfield so that it uses gcc2 macros. + + * dwarfout.c (byte_size_attribute): Changed code which outputs the + byte_size attribute so that it no longer uses the obsolete + DECL_SIZE_UNIT macro (from gcc1). + + * dwarfout.c: Replaced all uses of the obsolete macro TREE_PACKED + to uses of the new gcc2 macro DECL_BIT_FIELD. + + * dwarfout.c (deriv_list_attribute): Fixed typo "decl" => "type". + + * dwarfout.c (output_dies_for_type): Replaced bogus reference to the + non-existant routine "output_member_function_type_die" with a proper + reference to the routine "output_subroutine_type_die". + + * dwarfout.c (output_symbols_for_block): Fixed calling error which + was introduced by rms. + + * dwarfout.c: Replaced all uses of the obsolete macro STMT_SUBBLOCKS + with uses of the new gcc2 macro BLOCK_SUBBLOCKS. + + * dwarfout.c (output_symbol): Removed reference to TAG_DECL. The + use of TAG_DECLs was an early idea which didn't work out. + + * dwarfout.c: (dwarfout_init): Changed name from dwarfout_initialize + because rms failed to do so when he changed the name in the call. + +Fri Mar 15 17:22:14 1991 Richard Stallman (rms@mole.ai.mit.edu) + + * c-decl.c (pushdecl): Add `%s' to some error messages. + + * sparc.md: Add extra assembler alternative in last change. + + * cse.c (simplify_unary_operation, simplify_binary_operation): + Remove error checks that rejected SFmode. + + * expr.c (get_pointer_alignment): Don't lose on casts from integer + to pointer. + +Fri Mar 15 07:57:19 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * c-decl.c (pushdecl): Fix typo in previous change. + + * cse.c (simplify_{unary,binary}_operation): Fix usage of + REAL_VALUE_FROM_CONST_DOUBLE in recent change. + +Thu Mar 14 18:56:53 1991 Richard Stallman (rms@mole.ai.mit.edu) + + * c-decl.c (pushdecl): Warn if mismatch with implicit decl. + + * final.c (final_start_function): Handle NON_SAVING_SETJMP. + Include hard-reg-set.h. + * function.c (setjmp_protect, setjmp_protect_args): Likewise. + (expand_function_end): Call those if NON_SAVING_SETJMP. + +Thu Mar 14 14:40:45 1991 James Wilson (wilson at cygnus.com) + + * reload1.c (order_regs_for_reload): When REG_ALLOC_ORDER is defined, + use that definition only to order regs, do not try to put call + used regs first. This eliminates the benefits of defining the macro + in the first place. + + * real.h: New macros for real arithmetic, REAL_VALUE_FIX_TRUNCATE, + REAL_VALUE_UNSIGNED_FIX_TRUNCATE, REAL_VALUE_FIX, + REAL_VALUE_UNSIGNED_FIX. + + * cse.c (simplify_unary_operation): Added code to simplify floating + point rtx. Now simplifies UNSIGNED_FLOAT, ABS, FLOAT_TRUNCATE, + FLOAT_EXTEND, FIX, and UNSIGNED_FIX. Add aborts to default case + of switches. + (simplify_binary_operation): Added code to simplify floating point + rtx. Now simplifies PLUS, MINUS, MULT, and DIV. Add aborts to + default case of switches. + (*): Always use REAL_VALUE_TYPE and REAL_VALUE_FROM_CONST_DOUBLE + when extracting a floating point number from a CONST_DOUBLE. + +Thu Mar 14 14:40:45 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * expr.c (get_pointer_alignment): Update ALIGN for NOP_EXPR. + + * c-decl.c (builtin_function): New arg LIBRARY_NAME. + (initialize_decl_processing): Pass that argument. + + * c-decl.c (grokdeclarator): Handle C_TYPE_FIELDS_VOLATILE. + (finish_struct): Likewise. + * c-tree.h (C_TYPE_FIELDS_VOLATILE): Define it. + + * Makefile.in (gnulib1, gnulib2.portable): Test $$? after compilation. + + * c-typeck.c (check_format): Discard multiple NOP_EXPR levels. + + * objc-actions.c (build_message_expr, build_selector_expr, + build_encode_expr, get_class_ivars, start_class): Finding + Objective-C code in c source files is now a fatal error. + (They should recompile with -lang-objc.) + + * objc-actions.c (gen_method_decl): Don't crash for syntax + error in method declaration: -bar: x, y + (encode_array): Treat an undimensioned array the same as a pointer. + +Thu Mar 14 07:39:30 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reorg.c (try_merge_delay_insns): Previous fix had effect of + disabling this function. Rework to take into account things + needed, instead of set. This is still somewhat of a kludge. + + * recog.c (apply_change_group): An insn consisting of just a USE + or CLOBBER is always valid, but recog_memoized returns a -1 for it. + + * genattrtab.c: Count all definitions as well as counting insns; use + definition # in error message. + Most functions that accepted insn_code now accept insn_index as well + and similarly for structures containing insn_code. + + * reorg.c (try_merge_delay_insns): If not an annulling branch, take + into account things set in the delay slot. This prevents merging + two increments into one. + + * reorg.c (dbr_schedule): Fix typo in printing statistics. + +Thu Mar 14 02:11:56 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * genemit.c, genoutput.c, genrecog.c: Count all definitions + as well as counting insns; use # of definition in error messages. + + * toplev.c (pipe_closed, float_signal): Give it an explicit arg. + * cplus-decl.c (sigsegv): Likewise. + * cccp.c (pipe_closed): Likewise. + + * cccp.c: Delete trigraph from comment. + + * Makefile.in (realclean): Delete objc parser files. + + * assert.h (__assert for __GNUC__): Don't return value of abort. + +Wed Mar 13 16:12:54 1991 Richard Stallman (rms at churchy.ai.mit.edu) + + * expr.c (do_jump_by_parts_greater): Don't lose if labels are 0. + + * cplus-edsel.c: New name for cplus-cadillac.c. + * Makefile.in (cplus-edsel.o): Fix the compilation rule. + +Wed Mar 13 06:47:53 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reorg.c (mark_set_resources): Any registers mentioned in REG_INC + notes are set by an INSN. + + * flags.h (flag_expensive_optimizations): Add new flag. + * toplev.c: Support -fexpensive-optimizations and turn on for -O2. + * stmt.c (preserve_subexpressions_p): Use flag_expensive_optimizations + instead of testing for -O2 explicitly. + + * expr.h (operand_subword): Add missing declaration. + + * reload1.c (eliminate_regs): Handle INSN_LIST (found in REG_NOTES). + + * tm-i386.h (RETURN_POPS_ARGS): Don't call aggregate_type_p with + IDENTIFIER_NODE. + +Wed Mar 13 00:00:29 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * optabs.c (expand_binop, expand_unop): If wordwise, make target non0. + +Tue Mar 12 15:24:09 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * fixincludes: Quote the # in an echo. + * fixincludes: Fix typos handling size_t and ptrdiff_t. + * fixincludes (sys/file.h): Fix incorrect conditional in Ultrix. + + * c-typeck.c (initializer_constant_valid_p): Allow NON_LVALUE_EXPR. + Return a tree that indicates the relocation. + All callers changed. + + * jump.c (jump_optimize): Rerecognize jump insn after inverting it. + + * expr.c (do_jump): + Use can_compare_p on the operand mode, not the comparison's mode. + + * reload.c (subst_reloads): Fix dumb error in last change. + + * expr.c (do_jump_by_parts_equality*): Fix logic errors. + +Mon Mar 11 14:27:40 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * reload.c (subst_reloads): Don't make subregs, just new regs. + + * expr.c (do_jump_by_parts_equality, do_jump_by_parts_greater): + (do_jump_for_compare, do_jump_by_parts_equality_rtx): New functions. + (do_jump): Use them to handle wide values. + * optabs.c (can_compare_p): New function. + + * reload1.c (emit_reload_insns): Don't make subreg around RELOADREG; + just make a new REG. + + * cse.c, varasm.c: Fix typos. + + * sparc.md (move SI to reg_or_nonsymb_mem_operand): + Separate third alternative into two alternatives. + * tm-sparc.h (PREFERRED_RELOAD_CLASS): Return CLASS as given. + + * optabs.c (operand_subword): Fix typo. + + * longlong.h (__umulsidi3): Return .ll field. + +Mon Mar 11 11:43:21 1991 Jeffrey A. Law (law at mole.ai.mit.edu) + + * make-hp9k2bsd: New file. + * configure (hp9k200-bsd): Use it. + +Mon Mar 11 07:08:12 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-lex.c (check_newline): Clear TREE_INT_CST_HIGH once instead + of clearing TREE_INT_CST_LOW twice. + +Mon Mar 11 06:51:52 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * flow.c (mark_used_regs): If we are going to use a later + register to auto-increment, make sure it really is a REG. + In the case above, count any calls crossed by the new register. + + * global-alloc.c (global_conflicts): Mark registers modified by + virtue of a REG_INC note as modified in the insn to make conflicts. + (mark_reg_store): Accept SETTER value of 0. + +Sun Mar 10 16:56:25 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * optabs.c (operand_subword): New function to get one word of operand. + (expand_binop, expand_unop): Use it for word at a time case. + + * configure (a29-bsd*): Renamed from a29-sysv*. + + * expr.c (emit_library_call): Handle GNULIB_NEEDS_DOUBLE. + * tm-i860.h (GNULIB_NEEDS_DOUBLE): Define it. + + * tm-harris.h (ASM_FILE_START): Output a .file. + + * reload1.c (constraint_accepts_reg_p): Understand reg classes. + +Sun Mar 10 06:58:20 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * expr.c (move_by_pieces, move_by_pieces_ninsns, emit_push_insn): + If SLOW_UNALIGNED_ACCESS is defined, respect alignment even if + STRICT_ALIGNMENT is not defined. + * tm-a29k.h (SLOW_UNALIGNED_ACCESS): Define this. + +Sun Mar 10 02:57:40 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * cccp.c (handle_directive): If pass_thru and -C, print the + input before removing comments from it. + +Sat Mar 9 21:18:48 1991 Torbjorn Granlund (tege at musta.nada.kth.se) + + * gnulib2.c (div_qrnnd, __umulsidi3, lowpart, highpart, B): Move + to longlong.h. + (udiv_qrnnd): New name of div_qrnnd. Rewrite to work correctly. + (file header): Remove obsolete comment about internal format. + (bits): Remove this function. count_leading_zeros in longlong.h + is similar. + (__udivdi3): Use count_leading_zeros instead of bits. + (__udivdi3): Use umul_ppmm instead of __umulsidi3, as this makes + better code. + +Sat Mar 9 18:02:47 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * jump.c (jump_optimize): Avoid looking at PATTERN of NOTE + or CODE_LABEL. + + * reload1.c (reg_is_output_reload, count_for_*groups): Use + HARD_REG_SET instead of array to avoid bzero calls. + (reload_reg_used*): Likewise. + + * emit-rtl.c (gen_rtx, init_emit_once): Pre-compute CONST_INTs + from -64 to 64 to save space. + +Sat Mar 9 14:28:37 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * reload1.c (choose_reload_regs): Fix typo in last change. + +Sat Mar 9 01:03:01 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-decl.c (pushtag): Don't call `pushdecl' for nested type if + the type is already defined. + +Fri Mar 8 17:24:20 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * ns32k.md, vax.md (right shift patterns): When generating a right + shift, use xSHIFTRT but use (neg x) as the shift count to + more accurately represent what is supported by the machine. + + * expmed.c (emit_store_flag): Can't narrow result of scc insn before + normalizing. + +Fri Mar 8 12:56:41 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-class.c (pushclass): Set CURRENT_FUNCTION_DECL to + appropriate value so that pushtag does the right thing for tags + pushed into scope. + +Fri Mar 8 02:47:53 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * gcc.c (delete_temp_files): Delete only ordinary files. + + * tree.c, cplus-tree.c (TYPE_HASH): 777777 was supposed to be octal. + + * reload1.c (choose_reload_regs): Properly ensure EQUIV + is free and of the desired class. + When a reload may be a group, mark all its regs in use. + + * reload.c (push_reload): Don't call reg_overlap_mentioned_p + unless IN is a REG or MEM. + + * c-common.c, cplus-search.c, cplus-class.c (NULL): + Undef before defining. + + * sdbout.c (sdbout_one_type): Don't temporarily clear KNOWN_TYPE_TAG. + +Thu Mar 7 10:53:32 1991 Tom Wood (wood at dg-rtp.dg.com + + * toplev.c (main): Add -dp: annotate the assembly with a comment + describing the pattern and alternative used. Also, make -dm work + for USG systems. + * genoutput.c (output_epilogue): Output the array `insn_name'. + * final.c (debug_insn, final_scan_insn): Record the value of the + last insn processed by final_scan_insn. + (output_asm_insn): Annotate the assembly output. + (ASM_COMMENT_START): Provide a default value. + * tm-att386.h, tm-bsd386.h, tm-sun386.h (ASM_COMMENT_START): + Specify "/". + +Thu Mar 7 06:15:04 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-class.c (propagate_basetype_offsets): Check ASSOC_TYPE in + addition to return value from assoc value before aborting. ??? + should figure out why assocs are not shared. + +Wed Mar 6 16:29:37 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * c-decl.c (NULL): Undef before defining. + + * cccp.c (do_include): Allocate file name permanently. + +Wed Mar 6 09:06:39 1991 Tom Wood (wood at dg-rtp.dg.com) + + * m88k.md (and/ashift): Added for the new combine.c (ashift/and + works with the previous version). + (bcnd insns): Use bcnd to test for sign and zero. + (muldf3, divdf3): Use new method to deal with a power of two. + (andsi3, iorsi3, xorsi3): Split into two insns for some constants. + (call, call_value): Deal properly with a CONST_INT address. + * out-m88k.c (call_address_operand): Don't allow CONST_INT. + (uses_arg_area_p): New function for -moptimize-arg-area. + * tm-m88k.h (TARGET_SWITCHES): Delete -mpic in favor of -fpic. + Add -moptimize-arg-area and -mno-optimize-arg-area. + +Wed Mar 6 00:07:09 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * real.h (REAL_VALUE_FROM_CONST_DOUBLE): Takes input and output args. + * integrate.c (copy_for_inline, copy_rtx_and_substitute): + (restore_constants): Calls changed. + +Tue Mar 5 23:06:36 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * stmt.c (fixup_gotos): Handle jumping to end of rtl. + + * c-decl.c (store_parm_decls): If -traditional, + allow unsigned int in prototype in place of int. + + * cplus-cadillac.c: Delete all but the stubs. + +Tue Mar 5 16:59:18 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * jump.c (jump_optimize): Handle case of only NOTE insns after + NOTE_INSN_LOOP_BEG. + (duplicate_loop_exit_test): Return 0 when we hit a block + start or end, rather than quitting loop and getting confused. + + * integrate.c (subst_constants): Correctly move constants to + second operand of commutative operations. + + * jump.c (comparison_code_p): Deleted. + * combine.c (subst): Use GET_RTX_CLASS instead of comparison_code_p. + * cse.c (find_comparison_args): Likewise. + * recog.c (comparison_operator): Likewise. + * loop.c (get_condition): Likewise. + +Tue Mar 5 14:21:57 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * cse.c (fold_rtx): When checking for constant pool addresses, + handle addresses constructed from LO_SUM. + + * recog.c (constrain_operands): If before reload, `m' and `o' + accept all that could be reloaded to fit those constraints. + + * reload1.c (gen_input_reload): Return the first insn emitted by + this function, instead of the last insn emitted. + + * stmt.c (expand_end_loop): When move exit test to loop bottom, + also move a preceeding NOTE_INSN_LOOP_CONT note if it exists. + + * gcc.c (process_command): Check for running out of args after option. + + * out-mips.c, out-romp.c: Test BYTES_BIG_ENDIAN with #if. + * tm-i860.h (*_BIG_ENDIAN): Define as 0. + * tm-mips-news.h (BYTES_BIG_ENDIAN, WORDS_BIG_ENDIAN): Deleted. + (DECSTATION): Deleted. + + * tm-mips.h: Test WORDS_BIG_ENDIAN with #if. + + * tm-mips.h, tm-sparc.h, tm-spur.h (CONST_DOUBLE_OK_FOR_LETTER_P): + Use CONST_DOUBLE_LOW and CONST_DOUBLE_HIGH. + + * real.h: dconst0, dconst1, dconstm1 are declared twice. + Eliminate the second redundant declaration. + + * cse.c (FIXED_REGNO_P): Exclude OVERLAPPING_REGNO_P registers. + + * cccp.c (path_include): Handle empty names in path. + + * final.c: Use gvarargs.h, not varargs.h + + * configure (i860, i860-bsd): Handle +gas. + * tm-i860g.h, tm-i860bsdg.h: New files. + +Mon Mar 4 22:41:36 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * cse.c (simplify_unary_operation): When making a real const, use MODE. + +Mon Mar 4 21:35:47 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (cse_end_of_basic_block): Correctly handle case where + we find a "new" branch to follow. + (cse_end_of_basic_block, cse_main, cse_basic_block): PATH_SIZE + is now actual size, not size - 1. + +Mon Mar 4 06:44:27 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-decl.c (poplevel): Change test for whether to clobber the + DECL_CONTEXT of local variables. Now we won't clobber context for + any nested types. + +Mon Mar 4 00:39:11 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * jump.c (jump_optimize): When deleting x=y after y=x, + don't delete more than one death note, and don't delete any + unless we really do delete x=y. + + * cccp.c (main): Support -lang-objc++. + Eliminate compilation parameter CPLUSPLUS. + + * cccp.c (main): Handle leading or trailing space in `predefs'. + + * fixincludes: Fix typos handling size_t and ptrdiff_t. + +Sun Mar 3 16:41:24 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * cccp.c (main): Handle multiple spaces, and tabs, in `predefs'. + * gcc.c (do_spec_1): Allow extra whitespace in CPP_PREDEFINES. + Also transform -Dfoo=bar into -D__foo__=bar correctly. + + * varasm.c (assemble_zeros): Use ASM_BYTE if defined. + + * reload1.c (reload): Only special-case a spill reg alone in a class + if there is non-group need for that class. Be careful not to count + a reg in the usual place if it was counted in the special case. + + * reload1.c (order_regs_for_reload): Make fixed regs and + eliminable regs twice as bad as explicitly mentioned regs. + + * reload1.c (choose_reload_regs): Fix typos in last change. + + * c-decl.c (init_decl_processing): + Return type of memcpy varies if -traditional. + (ptr_ftype_ptr_cptr_sizet): Global var deleted. + + * reload1.c (emit_reload_insns): When updating reg_reloaded_contents, + first always clear, then maybe store nonzero value. + +Sun Mar 3 16:12:17 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-template.c (mangle_class_name_for_template): Add two + leading underscores, to avoid conflicts with programmer's names. + + * cplus-tree.h (struct lang_identifier): New field `template' + points to template info from which this identifier was + constructed. + + * cplus-template.c (current_template_expansion, + current_template_name): Variables deleted. + + * cplus-template.c (lookup_template_class): Top half of old + instantiate_template; returns the id_node. + (instantiate_template): Takes the id_node as argument now. + * cplus-parse.y (template rules): Use separate rule for checking + whether expansion is required. For base classes, always try it; + else do it only if `{' is not next token. + (template_type_name): New nonterminal for template class name + without expansion. + (template_type): Includes expansion, if needed. + + * cplus-input.c (input_from_saved_text): Deleted. + * cplus-template.c (instantiate_template): Call feed_input directly. + + * cplus-parse.y (base_class_visibility_list): Now type <itype>, + cast to tree in base_class action. + +Sun Mar 3 07:46:55 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * expr.c (do_store_flag): Consider A & single-bit as cheap. + + * fold-const.c (operand_equal_p): If ARG0 and ARG1 are the same + SAVE_EXPR, they are equal. + + * function.c (fixup_var_refs_1): Move mispositioned code in + (set (zero_extract ...) ...) case; fix incorrect indentation. + +Sun Mar 3 01:11:46 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * cccp.c (include_defaults, cplusplus_include_defaults): + Use STANDARD_INCLUDE_DIR. + (STANDARD_INCLUDE_DIR): Define by default as /use/include. + * tm-mips.h (STANDARD_INCLUDE_DIR): Define, if MIPS_BSD43. + (CPP_SPEC): Don't do -I to handle -ZSYSV, -ZBSD43. + +Sat Mar 2 17:20:57 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * expr.c (expand_expr, case COND_EXPR): Remove unneeded calls to + safe_from_p in A ? A : FOO cases. + +Sat Mar 2 16:14:24 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * reload1.c (choose_reload_regs): Support subreg as reload_override_in. + Likewise reload_reg_rtx. Just don't use REGNO on them. + (emit_reload_insns): Handle subreg as OLDEQUIV. + + * reload1.c (delete_output_reload): Pass the output reload insn, + not a spill reg index. Call in emit_reload_insns changed. + (emit_reload_insns): Don't actually update spill_reg_store + till after all reload insns have been made. + + * reload.c (push_reload): If existing reload has a reload reg, + make sure it fits the class of this reload. + + * stmt.c (fixup_gotos): Fix typo in last change. + + * reload1.c (choose_reload_regs): Don't use equiv reg + that is clobbered in this insn. + +Sat Mar 2 12:19:19 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-dem.c (optable): Add op for `operator,'. + + * toplev.c (main): Clear WARN_INLINE if FLAG_NO_INLINE is nonzero. + + * cplus-typeck.c (c_expand_return): Perform conversion to reference + in time that we can warn about the return of more non-lvalues. + Also, fix what appeared to be bugs in the code dealing with + WHATS_RETURNED. + +Sat Mar 2 00:11:18 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-parse.y (base_class): Base class may be a template class. + Split off non-visibility portion into base_class.1. + + * cplus-parse.y: Replaced PUBLIC, PRIVATE, PROTECTED with a single + terminal VISSPEC, with <itype> value, to simplify parser slightly. + * cplus-parse.h (enum rid): Added values for VISSPEC terminal. + * cplus-lex.c (is_reserved_word): Changed token types to VISSPEC, + rid values as appropriate. + (yylex): For VISSPEC, set itype value rather than ttype. + +Fri Mar 1 21:50:23 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-parse.y (.set_base_init): Discarded `preserve' code, which + was doing nothing. + +Fri Mar 1 19:01:25 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reorg.c (redundant_insn_p): Rename second arg to TARGET. + Handle the case where TARGET is a SEQUENCE. + (mark_target_live_regs): Don't get confused by registers conditionally + set in a JUMP_INSN when looking for regs set before used. + +Thu Feb 28 17:25:59 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * loop.c (check_dbra_loop): Replace code that thinks it knows + exactly what the RTL looks like (and gets it wrong) with call + to get_condition_for_loop. + +Thu Feb 28 16:35:21 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * c-typeck.c (build_compound_expr): Convert array to pointer. + +Wed Feb 27 15:46:54 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * gnulib1.c (FLOAT_ARG_TYPE, FLOATIFY): New macros. + (__*sf*): Use them for `float' args. + + * stmt.c (expand_end_case): + Test value of HAVE_casesi and HAVE_tablejump at runtime. + + * stmt.c (fixup_gotos): Check that jump into bindings + really comes from before the start of the bindings. + Use TREE_REGDECL to indicate error message printed. + +Wed Feb 27 15:01:51 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-template.c (end_template_decl): Store correct name in new + decl. Use pushdecl, not pushtag. + (instantiate_template): Use identifier's global value, not its + type. Pass back both template and new class in token value. + * cplus-lex.c (identifier_type): Templates now have type + TEMPLATE_DECL, not TYPE_DECL wrapped around a TEMPLATE_DECL. + +Wed Feb 27 06:27:45 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * loop.c (replace_regs): Don't make nested SUBREGs. + + * reload.c (push_reload): SUBREG_LOC applies only to INLOC, not OUTLOC. + + * cse.c (simplify_binary_operation): Simplify A&A, A|A, and A^A. + + * reload.c (find_reloads_address_1): Correctly handle (post_inc (mem)). + +Tue Feb 26 21:49:15 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * expmed.c (store_bit_field, extract_bit_field): Calls to + get_best_mode were passing alignment in bytes rather than + alignment in bits. + + * flags.h (flag_pedantic_errors): Declare it. + + * c-tree.h (C_TYPEDEF_EXPLICITLY_SIGNED): New flag. + * c-decl.c (grokdeclarator): Record that flag in new typedefs. + Check it when determining signedness of bitfields. + + * expr.c (expand_expr): In A ? A : B, make output safe from A and B. + + * reload.c (find_reloads_address, find_reloads_address_1): + Reload any reg that appears in a clobber in the same insn. + (regno_clobbered_p): New function. + +Tue Feb 26 21:41:43 1991 Michael Tiemann (tiemann at cygnus.com) + + * expr.c (expand_expr): Add missing arg to exapnd_exit_loop in + EXIT_EXPR case. + +Tue Feb 26 14:35:47 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * c-decl.c (grokdeclarator): Check pedantic error last. + + * tm-i386.h (STRUCT_VALUE, STRUCT_VALUE_INCOMING): Value is 0. + (RETURN_POPS_ARGS): Pop the structure return pointer here. + * out-i386.c (function_epilogue): + current_function_pops_args says how many args to pop. + + * tm-i386.h (CC_Z_IN_NOT_C): New cc flag. + * i386.md (je and jne patterns): Handle this flag. + (pattern using bt insns): Set the flag. + Output test insn instead if bit number is constant. + (insv): Changed constraint. + + * tm-i386.h (enum reg_class): Define ABCI_REGS. + (REG_CLASS_NAMES, REG_CLASS_CONTENTS): Support ABCI_REGS. + Fix the contents for ABC_REGS. + (REG_CLASS_FROM_LETTER): Define `x' for ABCI_REGS. + * i386.md (divsi3, udivsi3): Use `xm' for operand 2 constraint. + (divhi3, udivhi3, divmod*, udivmod*): Likewise. + + * cccp.c (pedwarn): Declare as void. + +Tue Feb 26 06:41:34 1991 Michael Tiemann (tiemann at cygnus.com) + + * tree.h (IDENTIFIER_VIRTUAL_P): New macro for IDENTIFIER_NODE. + Nonzero means that this identifier is used by a function declared + virtual. + * cplus-decl.c (grokfndecl): Set IDENTIFIER_VIRTUAL_P instead of + DECL_VIRTUAL_P. + * cplus-search.c (get_first_matching_virtual): Test + IDENTIFIER_VIRTUAL_P instead of DECL_VIRTUAL_P. + + * cplus-decl.c (pushtag): Handle classes which are nested in + function scope (as opposed to class scope). + (lookup_nested_type): Ditto. + * cplus-method.c (build_overload_nested_name): Ditto. + + * cplus-decl.c (grokdeclarator): Only globalize non-nested classes + declared in class scope (i.e., don't globalize in function scope). + +Tue Feb 26 06:11:37 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * a29k.md (storem): Fix typo in operand number. + + * expr.c (do_store_flag): Add missing cast required for some compilers. + + * tm-a29k.h (REG_CLASS_*, REGNO_REG_CLASS): Add new class Q_REGS + and constraint letter `q' for the Q register. Requested by tege. + + * tm-a29k.h (PRINT_OPERAND_ADDRESS): Allow short constant as address. + +Mon Feb 25 20:46:43 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * expr.c (expand_expr): In handling A : A ? FOO, use safe_from_p + against FOO. Fix many incorrect operand refs in A : FOO ? A. + + * sdbout.c (plain_type_1): Record type name only if using forward refs. + + * reload.c (find_reloads): Mark those RELOAD_OTHER reloads + that are used for output addresses, for choose_reload_regs. + + * integrate.c (copy_rtx_and_substitute): + Copy REG_USERVAR_P from original regs to new regs. + + * c-typeck.c (digest_init): Handle STRING_CST before same-type case. + +Mon Feb 25 13:31:51 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-decl.c (grokdeclarator): Handle the identification of + constructors declared in nested scope. + +Mon Feb 25 06:27:28 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reorg.c (next_insn_no_annul): New function. + (mark_set_resources, mark_target_live_regs): Don't count insns from + the target of a branch if the branch is annulling. + + * expmed.c (emit_store_flag): Get new register for target if + preserve_subexpressions_p returns nonzero. + Convert to desired mode, then normalize, instead of doing it + the other way around; this allows better combining. + +Sun Feb 24 20:07:02 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * cse.c (find_comparison_args): Fix indentation and misplaced paren. + + * Makefile.in (install-headers): Remove extraneous parens from + uses of shelllibsubdir. + +Sun Feb 24 15:49:42 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * loop.c (check_dbra_loop): Win if loop biv is used only for counting. + + * cccp.c (struct definition): Record file and line. + (create_definition): Store that information. + (do_define): Identify location of previous definition. + (pedwarn_with_file_and_line): New function. + +Sat Feb 23 13:36:13 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * c-decl.c (grokdeclarator): Error for `signed void', etc. + Warning for `signed my_int', and only if pedantic. + + * toplev.c (warn_cast_align): New flag, with -W option. + * c-typeck.c (build_c_cast): Warn if target alignment increases. + +Sat Feb 23 10:22:03 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-type2.c (store_init_value): Global variables must be + specially initialized in PIC under SunOS. + + * cplus-dbxout.c (dbxout_tags): Test that the tag's value has not + been cleared before trying to use it as a type. This happens when a + class starts out looking like a nested class, but turns out to be a + reference to an implicitly defined global class. + +Sat Feb 23 06:16:44 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * jump.c (true_regnum): If given a pseudo not assigned a hard reg, + return the pseudo register number. + + * out-rs6000.c (update_cc): Remove CC_REVERSE and CC_NONNEG. + * rs6000.md (define_attr "cc"): Remove reverse. + (cmpsi): Only allow second arg to be a constant. + Remove some unneeded comparison patterns. + + * rs6000.md (misc logical patterns): Only add CLOBBER for MQ + when we really clobber it; we used to do so in more cases to + work around a since-fixed restriction in combine.c + + * rs6000.md (extend*): Use DEFINE_EXPAND instead of a pattern + that generates two insns. Remove (sign_extend (ashift ..) ...) + and similar patterns; no longer neeed. + + * rs6000.md (fma instruction): Add missing single-precision case. + + * out-rs6000.c (print_operand, case 's' and 'S'): Truncate to low-order + 5 bits. + + * out-rs6000.c (output_prolog, output_epilog): Correct code to handle + large stack frames; used 65535 instead of 32767 and had a typo. + + * tm-romp.h (CC_IN_NOT_TB): Deleted. + * out-romp.c (update_cc): No longer need CC_REVERSE, CC_NONNEG, or + CC_NOTTBIT. + (print_operand): Remove use of CC_IN_NOT_TB. + * romp.md (define_attr "cc"): Remove reverse,nonneg, and nottbit. + (mttbi): Remove redundant pattern. + (cmpsi): First arg can only be register_operand. + Remove some unneeded COMPARE patterns. + + * romp.md (movhi): Use zero-extend, not sign-extend load. + + * out-romp.c: (float_conversion): Allow CONST_INT as operand. + + * out-romp.c (first_reg_to_save): Ensure we save r14 if we use it. + + * a29k.md (divsf3): Fix typo in name; was divds3. + + * tm-a29k.h: Add new -mno-storem-bug and TARGET_NO_STOREM_BUG. + (TARGET_SWITCHES): -m29050 turns on -mno-storem-bug. + * a29k.md: (store_multiple_bug): New pattern to work around chip bug. + (store_multiple_no_bug): New name for original pattern. + (store_multiple): Choose depending on TARGET_NO_STOREM_BUG. + (storem patterns): Two cases, with and without bug. + + * a29k.md (extend*): Don't define single insn for sign_extend. + Instead, use DEFINE_EXPAND. Delete DEFINE_SPLITs for the old patterns. + + * a29k.md (jumpfdec pattern): Fix typo. + + * tm-a29k.h, tm-romp.h, tm-rs6000.h (CC1_SPEC): Remove optimization + selections. + (OPTIMIZATION_OPTIONS): Turn off insn scheduling by default until + it is fixed. + + * tm-a29k.h, tm-romp.h, tm-rs6000.h (SETUP_INCOMING_VARARGS): + Correctly handle the case of the special argument being other than + the first arg. + + * tm-a29k.h (GO_IF_LEGITIMATE_ADDRESS): A tiny constant (< 255) + is also a valid address. + + * tm-a29k.h, tm-romp.h, tm-rs6000.h (BYTE_LOADS_ZERO_EXTEND): Add to + support combine.c in development. + + * jump.c (jump_optimize, can_reverse_comparison_p, delete_jump): + Consistently allow NOTEs between the set and use of CC0. + * reorg.c (delete_scheduled_jump): Likewise. + + * expmed.c (emit_store_flag): Pass in UNSIGNEDP; can't derive it from + comparison code. + * expr.c (do_store_flag): Add UNSIGNEDP arg to emit_store_flag call. + * jump.c (jump_optimize): Likewise. + * optabs.c (expand_binop): Likewise. + + * local-alloc.c (requires_inout_p): New function. + (block_alloc): Use high-priority preferences if we have a hard + register used in an insn that requires the same register for + input as for the output. + (combine_regs): Rename argument COPY to MAY_SAVE_COPY. + + * cse.c (simplify_binary_operation, case MULT): Convert multiply + by power of two to shift. + (cse_insn): Don't share rtx obtained from the hash table; copy it. + +Sat Feb 23 00:27:26 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * rtlanal.c (dead_or_set_p): Don't check for REG_INC. + + * reload.c (push_reload): (subreg:m1 (reg:m2 ...) ...) with M1 wider + than M2 is also a paradoxical SUBREG. + +Fri Feb 22 14:43:44 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * reload1.c (possible_group_p): Add missing forward declaration. + + * reload1.c (eliminate_regs, case PLUS): Ensure we handle the + case of (plus reg1 reg2) where REG1 is eliminable and REG2 is + psuedo that didn't get a hard reg and has reg_equiv_constant nonzero. + (choose_reload_regs): If reload_needed_for_multiple, + the reload can't be input-only or output-only. + (emit_reload_regs): Avoid regno_dead_p. + * combine.c (regno_dead_p): Function deleted. + + * Makefile.in (maketest): Finish renaming config to configure. + + * gcc.c (lookup_compiler): Create a new entry to represent + the result of searching for an alias entry. + + * reload.c (combine_reloads): Swap args to reg_overlap_mentioned_p. + +Fri Feb 22 09:40:50 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-parse.y (base_class_list): Re-fix precedence so we can use MI. + + * cplus-except.c (init_exception_processing): Push exception ctors + and dtors into scope so they can be inlined. + +Fri Feb 22 08:03:47 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * genemit.c (output_init_mov_optab): New function. + (main): Have insn-emit.c include insn-codes.h. + Call output_init_mov_optab. + * optabs.c (gen_move_insn): Handle moving MODE_CC modes; we may have + to find a different mode to do this in. + (init_optabs): Try to initialize CCmode in mov_optab; if we have + EXTRA_CC_MODES, call init_mov_optab. + * Makefile.in (insn-emit.o): Now depends on insn-codes.h. + + * rtl.h (get_last_insn_anywhere): Add missing declaration. + + * stmt.c: Now includes hard-reg-set.h (for n_non_fixed_regs). + (preserve_subexpressions_p): Renamed from inside_loop. + Always return true if optimize >= 2; always return false if + optimize == 0. If optimize == 1, only return true if we aren't + very far into a loop instead of whenever we are in any loop. + * Makefile.in (stmt.o): Now includes hard-reg-set.h. + * expr.c (expand_expr): Use preserve_subexpressions_p instead of + inside_loop. + Only set TARGET to SUBTARGET if TARGET isn't a pseudo register. + (expand_expr, case REAL_CST): Don't call force_reg; now done in + expand_binop, if required. + * optabs.c (expand_binop, expand_twoval_binop, emit_cmp_insn): + If arg is expensive constant and preserve_subexpressions_p is true, + force it into a register. + * out-sparc.c (emit_move_sequence): Call preserve_subexpressions_p + instead of inside_loop. + + * reload1.c (eliminate_regs, case SUBREG): Correct test for paradoxical + SUBREG. + + * varasm.c (output_constant_pool): If entry refers to a deleted label, + write a zero instead of the undefined label. + +Fri Feb 22 02:49:24 1991 Ken Raeburn (raeburn at watch.com) + + * Reversed all changes dated 20 February. + * cplus-template.c (pending_template_expansion): New function; + given template name, returns class name of expansion in progress. + * cplus-parse.y (PTYPENAME -> typespec): Call it. + ('~' PTYPENAME -> notype_declarator): Ditto. + +Thu Feb 21 15:17:13 1991 Craig Burley (burley at geech.ai.mit.edu) + + * c-common.c (check_case_value): If value is NULL_TREE, return it + without any further checking. + + * stmt.c (pushcase_range): If value1 is NULL_TREE, substitute + minimum value for the type, if value2 is NULL_TREE, substitute + maximum value for the type, from then on assume both are not NULL_TREE. + These changes appear to provide minimal support for case ranges. + + * c-typeck.c (digest_init): For explicit array element initializer + case, change check against max value of domain so index may equal it. + For array element initialization, give next initializer a chance to + override the choice of next index before falling out of loop because + next index is out of range. For structure initialization, give next + initializer a similar chance before falling out of loop because no + more fields exist. + + * reload1.c (possible_group_p): Needed a forward decl (static). + +Thu Feb 21 14:37:01 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * c-decl.c (grokdeclarator): + Don't make bitfield type unsigned if comes from typedef. + + * reload1.c (reload): Don't require INITIAL_FRAME_POINTER_OFFSET + if cannot eliminate the frame pointer. + + * i860.md (cbranch, inverse_cbranch): Use eq to test cc0. + (negated branch patterns): New patterns. + + * tm-i860.h (INITIALIZE_TRAMPOLINE): Use size_int, not build_int. + + * reload1.c (reload): Save and restore notes around find_reloads. + + * tm-sun2os4.h (LINK_SPEC): New macro. + * tm-sun386i.h (LINK_SPEC): Undef before redefining. + + * cccp.c (do_include): Check for -2, not -1, as value of lookup_import. + + * c-parse.y (initlist): Fix typo. + +Mon Feb 18 02:50:38 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-decl.c (grokdeclarator): Try to come up with better magic + for implicitly globalizing classes implicitly declared in class + scope. + +Sun Feb 17 09:27:38 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-tree.c (virtual_offset): New function. Returns the offset + of a baseclass that is virtual or comes from a virtual baseclass, or + NULL if there is no such baseclass. + * cplus-class.c (modify_vtable_entries): Call this function instead + of `virtual_member'. `virtual_member' can return the wrong thing if + we try to use it for an offset computation of a baseclass which is + not strictly a virtual baseclass. + +Sat Feb 16 06:21:03 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * recog.c (validate_replace_rtx_1): Use correct rtx_code for the + new operation when commuting operands. + Generalize to commute operands on comparison operation. + +Fri Feb 15 23:01:24 1991 Richard Stallman (rms at geech.ai.mit.edu) + + * c-parse.y (initlist): Finish changing `case N:' to `[N]'. + + * combine.c (try_combine): Update reg_first_use. Flush useless links. + +Thu Feb 14 17:06:44 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-parse.y (template_parm): New derivation from `class ID', + for consistent return of `identifier_node' nodes with `class A : + B' case. + * cplus-template (end_template_parm_list): Nothing to strip off of + identifier_nodes now. + (process_template_parm): Strip off one level of tree_list, + discarding (for now) the required base class. Don't need to run + through grok* any more. + +Sun Feb 10 19:23:21 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * gcc.c (main, process_command, default_compilers): Fix typos. + +Sat Feb 9 15:06:43 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * gcc.c (process_command): Handle separate args for -B, -b, -V. + + * gcc.c (lookup_compiler): New function. Handles alias entries. + (main): Call that. + (default_compilers): Make all real suffixes into alias entries. + (infiles): Now a vector of structures, containing specified language. + (process_command): Handle -x to specify language. + (main): Use specified language if any. + +Fri Feb 8 18:31:00 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * fold-const.c (fold): Set TREE_USED when create COMPOUND_EXPR. + * stmt.c (warn_if_unused_value): Don't warn if TREE_USED. + * c-typeck.c (build_unary_op): Handle multiple casts inside ++. + +Fri Feb 8 07:37:24 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * real.h (dconst2): New variable. + * emit-rtl.c (init_emit_once): Initialize dconst2. + * tree.c (real_twop): New function. + * cse.c (simplify_unary_operation): Fold FLOAT, FLOAT_EXTEND, and + FLOAT_TRUNCATE. + (simplify_binary_operation): Convert x*2 to x+x. + (cse_insn): Handle case where constant equivalent is in table. + Fix minor bug with merging src_related_elt. + * fold-const.c (fold): If commutative operation, move a constant + first operand to the second operand. + Remove tests of constants as first operand for commutative operations. + Convert x*2 to x+x. + +Fri Feb 8 03:07:34 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-ptree.c (print_lang_decl): Corrected argument list. Print + address of template info for TEMPLATE_DECL nodes. + + * cplus-decl.c (set_current_level_tags_transparency): New + function, for altering tag-transparency of a context. + + * cplus-parse.y (PRE_PARSED_METHOD_DEF): Was unused; now gone. + (template_instantiation): Handle $-references correctly. Generate + a class_head-like value for LC actions to operate on. + (maybe_base_class_list): New non-terminal: colon and base class + list, or empty. + (named_class_head): Use it. + (unnamed_class_head): Use '{', not LC. + (class_head): If template_instantiation found, use its value. + (template_arg): Apply groktypename to typename args. + + * cplus-template.c (template_text_obstack): Deleted, just use + permanent_obstack instead. + (init_template): Deleted; callers changed. + (current_template_info): New variable: pointer to last-saved + template info record. + (end_template_decl): Use DECL_NAME, DECL_ARGUMENTS, + DECL_LANG_SPECIFIC, rather than TREE_OPERANDs. Save most of + template info here. + (reinit_parse_for_template): Only save text here, in + already-allocated template info record. + (mangle_class_name_for_template): New function. + (instantiate_template): Finally written. + +Thu Feb 7 22:06:56 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * tm-i386v4.h (ASM_OUTPUT_COMMON): Specify rounding in the output. + (ASM_OUTPUT_LOCAL): Use .local and .comm. + + * tm-news.h (FUNCTION_PROLOGUE): Correct syntax of link insn. + (PRINT_OPERAND_ADDRESS): Use period, not colon, before index reg width. + + * stmt.c (pushcase, pushcase_range): + Don't warn for code before first `case' if there is a label on it. + +Thu Feb 7 06:23:10 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * integrate.c (initialize_for_inline): Accept COPY argument. + Only copy parameter DECL_RTL if COPY non-zero; in that case, + also replace DECL_RTL with copy. All callers changed. + (copy_decl_rtls): New function. + (save_for_inline_copying): Use copy_decl_rtls to copy MEM DECL_RTLs + in the function. + Copy address of pseudos if they are a MEM. + +Wed Feb 6 19:19:25 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * c-typeck.c (build_binary_op_nodefault): No warn for RSHIFT by 0. + +Wed Feb 6 17:37:23 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * function.c (fixup_var_refs_1): Accept a location in rtx instead + of an rtx. + Unless -fforce-mem, if an insn is valid with MEM, leave it alone. + Rework ZERO_ and SIGN_EXTRACT cases to properly do adjustments + and generalize to support other than QImode MEMs. + (fixup_var_refs_insns): Change call to fixup_var_refs_1. + +Wed Feb 6 08:14:21 1991 Tom Wood (wood at dg-rtp.dg.com) + + * m88k.md (cmp): Use reg_or_0_operand to avoid swapped compares. + (call patterns): Put use of r1 in a parallel construct. + (multiply and divide by a power of two): Now just multiply. The + new combiner will change divide by a power of two into multiply. + (movhi, movqi): Use zero-extend load. + * tm-m88k.h (BYTE_LOADS_ZERO_EXTEND): Use it. + (H constraint): Changed to mean one or two. + * out-m88k.c: Use the proper includes for non-USG systems. + * xm-m88k.h: Include tm.h at the end. + +Wed Feb 6 02:24:38 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-decl.c (pushtag): Don't try to nest classes from non-C++ + language scopes. + +Wed Feb 6 01:33:16 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * cse.c (simplify_binary_operation): Don't change div into mult. + +Tue Feb 5 10:59:53 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-parse.y (template_instantiation): Supply base class list + and use guts of class declaration. Untested; will have to be + fixed up to deal with template context manipulations. + +Tue Feb 5 00:52:57 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * c-common.c (combine_strings): Finish fixing wide strings. + + * reload1.c (possible_group_p): New subroutine. + (reload): Don't kill last group when looking for a non-group. + + * expmed.c (expand_divmod): If emit cmp insn, force op0 into reg. + + * objc-parse.y (init_lex, yylex): max_wide now measured in chars. + (yylex): Treat \r as whitespace if traditional. + + * toplev.c (compile_file): Add missing arg for dbxout_finish. + + * objc-actions.c (lang_finish): New dummy function. + + * calls.c (expand_call): Recognize other names for setjmp-like fns. + + * gcc.c (main): Use obstack_init, not gcc_obstack_init. + + * varasm.c (assemble_zeros): New function. + All calls to ASM_OUTPUT_SKIP elsewhere now use this function. + Handle ASM_NO_SKIP_IN_TEXT. + * toplev.c (compile_file): Use assemble_zeros. + * final.c (end_final): Likewise. + * tm-3b1.h, tm-att386.h, tm-mot3300.h (ASM_NO_SKIP_IN_TEXT): + Define as 1. + * tm-3b1.h (ASM_OUTPUT_SKIP): Don't deal with outputting zeros. + +Mon Feb 4 20:37:33 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * m68k.md: Use %$ and %& where appropriate. + (special float_truncate pattern): New, for 68040. + (68881 DF multiply recognizers): Avoid fscale if 68040. + (68881 SF multiply recognizers): Avoid fsglmul if 68040. + + * tm-next.h (SECTION_FUNCTION): Simplify; remove last arg. + (EXTRA_SECTION_FUNCTIONS): Rewrite to go with that change. + +Mon Feb 4 18:22:54 1991 Richard Kenner (kenner at vlsi1.ultra.nyu.edu) + + * reorg.c (link_cc0_isns): New function. + (fill_simple_delay_slots, fill_slots_from_thread): Call it. + (fill_slots_from_thread): Don't make REG_CC_STATUS notes. + (delete_scheduled_jump): Use REG_CC_SETTER instead of REG_CC_STATUS. + Correctly locate compare insn in CC0 case. + (steal_delay_list_from_target): Don't steal an insn that sets cc0; + we can't safely copy it. + (fill_slots_from_thread): Can't put insn that sets CC0 in delay slot + if we don't own its thread; this would otherwise require copying it. + (relax_delay_slots): Don't collapse jump to next insn if it has a + cc0-setting insn in a delay slot. + + * reorg.c (update_block): Accept location to place USE marker; use if + INSN is in a delay slot. + (mark_target_live_regs): Handle the case where we deleted the start + of the basic block that was previously used for a target. + Ignore insns with INSN_FROM_TARGET_P. + (optimize_skip, try_merge_delay_insns, fill_simple_delay_slots): + Pass new argument to update_block. + (try_merge_delay_insns, redundant_insn_p): Clear INSN_FROM_TARGET_P + to show that this insn will be used in both paths of the branch. + (try_merge_delay_insns): Add calls to update_block for insns deleted + from delay slots. + + * reorg.c (mostly_true_jump): If no jumps between target and end of + function, predict as false. + If comparison == 0, predict false; != 0, predict true. + + * reorg.c (steal_delay_list_from_{target,fallthrough}): + Ignore redundant insn even if it can't be placed in our delay slot. + (fill_slots_from_thread): Likewise. + Ensure we don't call redundant_insn_p on any insns that conflict + with what we need and set. + + * reorg.c (fill_eager_delay_slots): Pick up new value of JUMP_LABEL; + it may have been changed by first call to fill_slots_from_thread. + + * rtl.h (REG_TAIL_CALL): Deleted; never documented or used. + (REG_CC_SETTER, REG_CC_USER): Replacements for REG_CC_STATUS. + * rtl.c (reg_note_name): New names. + * final.c (final_scan_insn): Replace REG_CC_STATUS with REG_CC_SETTER; + now only one insn. + * emit-rtl.c (next_cc0_user, prev_cc0_setter): Use REG_CC_SETTER and + REG_CC_USER. + + * cplus-cadillac.c, cplus-class.c, cplus-decl.c, cplus-lex.c: + Replace obstack_init with gcc_obstack_init. + * cplus-search.c, flow.c, gcc.c, loop.c, reload1.c: Likewise. + * reorg.c, stmt.c: Likewise. + + * reload1.c (eliminate_regs, case ASM_OPERANDS): Fix typo when making + new ASM_OPERANDS. + + * recog.c: Now includes insn-flags.h and insn-codes.h. + (validate_replace_rtx_1): If replacing the source of a ZERO_ or + SIGN_EXTRACT with a MEM, try to put the MEM in the mode to be used for + the MEM. + * Makefile.in (recog.o): Depends on insn-flags.h and insn-codes.h. + +Mon Feb 4 17:39:36 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * c-typeck.c (digest_init): Error if init array with another array. + +Mon Feb 4 04:58:20 1991 Ken Raeburn (raeburn at watch.com) + + * cplus-tree.def (TEMPLATE_DECL): New node type. + (TEMPLATE_PARM_IDX): New node type; like integer, with an extra + field. + + * cplus-method.c (check_text_len): Fix up error message to be more + correct. Moved function before new_text_len so that the latter + can call it and inlining can work. + (new_text_len): Call check_text_len. + + * cplus-method.c (build_overload_name): No longer static. + + * cplus-class.c (unuse_fields): Now static. + (popclass): Use a temporary when building C_C_D. + + * cplus-decl.c (lookup_tag): Don't complain about type mismatch if + the tag found is for a template. + + * cplus-lex.c: New lookup tables, for new "template" keyword. + (reinit_lang_specific): Call init_template. + (init_lex): Ditto. + (file_from_saved_text): Renamed from input_from_saved_text. + + * cplus-lex.c (identifier_type): New function; returns primary + type (IDENTIFIER, TYPENAME, PTYPENAME) indicated by token name. A + PTYPENAME is returned for (TYPE_DECL (TEMPLATE_DECL ...)) nodes. + (see_typename): Call it. + + * cplus-lex.c (yylex): In handling identifiers, use subset of + TYPENAME code for PTYPENAME tokens. + + * cplus-template.c: New file. + (begin_template_parm_list): Push new scope and switch to permanent + obstack. + (end_template_parm_list): Return parameter list as a tree vector. + (end_template_decl): Save away new TEMPLATE_DECL node. + (process_template_parm): Build up tree list of template + parameters. + (instantiate_template): For now, just complain. + (init_template): Set up template obstack. + (reinit_parse_for_template): Gobble up class definition text and + save it away. + + * cplus-parse.y (template_header, template_parm_list): Call above + routines. + (datadef): Put template declarations here, instead of in + class_head. + (named_class_head_sans_basetype, named_class_head, + unnamed_class_head): Break up old class_head derivations. + (class_head): Now any of the above, plus template types with or + without instantiation. + (template_type): Call instantiate_template. + (template_arg_list): Build up list of args. + + * cplus-tree.h (lang_type): Add TEMPLATE field. Also add macro + TYPE_TEMPLATE. + +Sun Feb 3 21:16:36 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * tm-m68k.h (PRINT_OPERAND): Handle `&' and `$'. + (PRINT_OPERAND_PUNCT_VALID): They are valid. + + * out-next.c (handle_pragma): Unread the newline. + + * toplev.c (main): Warn if meaningless optimizations are requested. + Don't enable options by default that would get warnings. + + * m68k.md (extend QI to HI): Typo in clr insn. + + * c-common.c (combine_strings): Decrement LEN properly when copying. + * c-parse.y (init_lex, yylex): max_wide now measured in chars. + + * tree.c (gcc_obstack_init): Fix typo in forward decl. + +Sat Feb 2 09:24:56 1991 Michael Tiemann (tiemann at cygnus.com) + + * cplus-decl.c (poplevel): Change DECL_CONTEXT of decls only of + their context is CURRENT_FUNCTION_DECL. + +Fri Feb 1 13:46:07 1991 Richard Stallman (rms at mole.ai.mit.edu) + + * print-tree.c (print_node): Don't print chain for `c' and `x' nodes. + + * loop.c (record_excess_regs): Moved here. + +See file ChangeLog.2. |