diff options
Diffstat (limited to 'gcc/cp/init.c')
| -rw-r--r-- | gcc/cp/init.c | 4000 |
1 files changed, 0 insertions, 4000 deletions
diff --git a/gcc/cp/init.c b/gcc/cp/init.c deleted file mode 100644 index 006e13f83e5..00000000000 --- a/gcc/cp/init.c +++ /dev/null @@ -1,4000 +0,0 @@ -/* Handle initialization things in C++. - Copyright (C) 1987, 89, 92, 93, 94, 95, 1996 Free Software Foundation, Inc. - Contributed by Michael Tiemann (tiemann@cygnus.com) - -This file is part of GNU CC. - -GNU CC is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU CC is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ - - -/* High-level class interface. */ - -#include "config.h" -#include "tree.h" -#include "rtl.h" -#include "cp-tree.h" -#include "flags.h" -#include "output.h" - -/* In C++, structures with well-defined constructors are initialized by - those constructors, unasked. CURRENT_BASE_INIT_LIST - holds a list of stmts for a BASE_INIT term in the grammar. - This list has one element for each base class which must be - initialized. The list elements are [basename, init], with - type basetype. This allows the possibly anachronistic form - (assuming d : a, b, c) "d (int a) : c(a+5), b (a-4), a (a+3)" - where each successive term can be handed down the constructor - line. Perhaps this was not intended. */ -tree current_base_init_list, current_member_init_list; - -extern tree cleanups_this_call; - -void emit_base_init (); -void check_base_init (); -static void expand_aggr_vbase_init (); -void expand_member_init (); -void expand_aggr_init (); - -static void expand_aggr_init_1 PROTO((tree, tree, tree, tree, int, int)); -static void expand_virtual_init PROTO((tree, tree)); -tree expand_vec_init (); - -static void add_friend (), add_friends (); - -/* Cache _builtin_new and _builtin_delete exprs. */ -static tree BIN, BID, BIVN, BIVD; - -/* Cache the identifier nodes for the magic field of a new cookie. */ -static tree nc_nelts_field_id; - -static tree minus_one; - -/* Set up local variable for this file. MUST BE CALLED AFTER - INIT_DECL_PROCESSING. */ - -static tree BI_header_type, BI_header_size; - -void init_init_processing () -{ - tree fields[1]; - - /* Define implicit `operator new' and `operator delete' functions. */ - BIN = default_conversion (get_first_fn (IDENTIFIER_GLOBAL_VALUE (ansi_opname[(int) NEW_EXPR]))); - TREE_USED (TREE_OPERAND (BIN, 0)) = 0; - BID = default_conversion (get_first_fn (IDENTIFIER_GLOBAL_VALUE (ansi_opname[(int) DELETE_EXPR]))); - TREE_USED (TREE_OPERAND (BID, 0)) = 0; - BIVN = default_conversion (get_first_fn (IDENTIFIER_GLOBAL_VALUE (ansi_opname[(int) VEC_NEW_EXPR]))); - TREE_USED (TREE_OPERAND (BIVN, 0)) = 0; - BIVD = default_conversion (get_first_fn (IDENTIFIER_GLOBAL_VALUE (ansi_opname[(int) VEC_DELETE_EXPR]))); - TREE_USED (TREE_OPERAND (BIVD, 0)) = 0; - minus_one = build_int_2 (-1, -1); - - /* Define the structure that holds header information for - arrays allocated via operator new. */ - BI_header_type = make_lang_type (RECORD_TYPE); - nc_nelts_field_id = get_identifier ("nelts"); - fields[0] = build_lang_field_decl (FIELD_DECL, nc_nelts_field_id, sizetype); - finish_builtin_type (BI_header_type, "__new_cookie", fields, - 0, double_type_node); - BI_header_size = size_in_bytes (BI_header_type); -} - -/* Subroutine of emit_base_init. For BINFO, initialize all the - virtual function table pointers, except those that come from - virtual base classes. Initialize binfo's vtable pointer, if - INIT_SELF is true. CAN_ELIDE is true when we know that all virtual - function table pointers in all bases have been initialized already, - probably because their constructors have just be run. ADDR is the - pointer to the object whos vtables we are going to initialize. - - REAL_BINFO is usually the same as BINFO, except when addr is not of - pointer to the type of the real derived type that we want to - initialize for. This is the case when addr is a pointer to a sub - object of a complete object, and we only want to do part of the - complete object's initialization of vtable pointers. This is done - for all virtual table pointers in virtual base classes. REAL_BINFO - is used to find the BINFO_VTABLE that we initialize with. BINFO is - used for conversions of addr to subobjects. - - BINFO_TYPE (real_binfo) must be BINFO_TYPE (binfo). - - Relies upon binfo being inside TYPE_BINFO (TREE_TYPE (TREE_TYPE - (addr))). */ - -void -expand_direct_vtbls_init (real_binfo, binfo, init_self, can_elide, addr) - tree real_binfo, binfo, addr; - int init_self, can_elide; -{ - tree real_binfos = BINFO_BASETYPES (real_binfo); - tree binfos = BINFO_BASETYPES (binfo); - int i, n_baselinks = real_binfos ? TREE_VEC_LENGTH (real_binfos) : 0; - - for (i = 0; i < n_baselinks; i++) - { - tree real_base_binfo = TREE_VEC_ELT (real_binfos, i); - tree base_binfo = TREE_VEC_ELT (binfos, i); - int is_not_base_vtable = - i != CLASSTYPE_VFIELD_PARENT (BINFO_TYPE (real_binfo)); - if (! TREE_VIA_VIRTUAL (real_base_binfo)) - expand_direct_vtbls_init (real_base_binfo, base_binfo, - is_not_base_vtable, can_elide, addr); - } -#if 0 - /* Before turning this on, make sure it is correct. */ - if (can_elide && ! BINFO_MODIFIED (binfo)) - return; -#endif - /* Should we use something besides CLASSTYPE_VFIELDS? */ - if (init_self && CLASSTYPE_VFIELDS (BINFO_TYPE (real_binfo))) - { - tree base_ptr = convert_pointer_to_real (binfo, addr); - expand_virtual_init (real_binfo, base_ptr); - } -} - -/* 348 - 351 */ -/* Subroutine of emit_base_init. */ - -static void -perform_member_init (member, name, init, explicit) - tree member, name, init; - int explicit; -{ - tree decl; - tree type = TREE_TYPE (member); - extern int temp_slot_level; - extern int target_temp_slot_level; - tree old_cleanups = cleanups_this_call; - int old_temp_level = target_temp_slot_level; - push_temp_slots (); - push_temp_slots (); - target_temp_slot_level = temp_slot_level; - - if (TYPE_NEEDS_CONSTRUCTING (type) - || (init && TYPE_HAS_CONSTRUCTOR (type))) - { - /* Since `init' is already a TREE_LIST on the current_member_init_list, - only build it into one if we aren't already a list. */ - if (init != NULL_TREE && TREE_CODE (init) != TREE_LIST) - init = build_tree_list (NULL_TREE, init); - - decl = build_component_ref (current_class_ref, name, NULL_TREE, explicit); - - if (explicit - && TREE_CODE (type) == ARRAY_TYPE - && init != NULL_TREE - && TREE_CHAIN (init) == NULL_TREE - && TREE_CODE (TREE_TYPE (TREE_VALUE (init))) == ARRAY_TYPE) - { - /* Initialization of one array from another. */ - expand_vec_init (TREE_OPERAND (decl, 1), decl, - array_type_nelts (type), TREE_VALUE (init), 1); - } - else - expand_aggr_init (decl, init, 0, 0); - } - else - { - if (init == NULL_TREE) - { - if (explicit) - { - cp_error ("incomplete initializer for member `%D' of class `%T' which has no constructor", - member, current_class_type); - init = error_mark_node; - } - /* member traversal: note it leaves init NULL */ - else if (TREE_CODE (TREE_TYPE (member)) == REFERENCE_TYPE) - cp_pedwarn ("uninitialized reference member `%D'", member); - } - else if (TREE_CODE (init) == TREE_LIST) - { - /* There was an explicit member initialization. Do some - work in that case. */ - if (TREE_CHAIN (init)) - { - warning ("initializer list treated as compound expression"); - init = build_compound_expr (init); - } - else - init = TREE_VALUE (init); - } - - /* We only build this with a null init if we got it from the - current_member_init_list. */ - if (init || explicit) - { - decl = build_component_ref (current_class_ref, name, NULL_TREE, explicit); - expand_expr_stmt (build_modify_expr (decl, INIT_EXPR, init)); - } - } - expand_cleanups_to (old_cleanups); - pop_temp_slots (); - pop_temp_slots (); - target_temp_slot_level = old_temp_level; - /* There might something left from building the trees. */ - if (cleanups_this_call) - { - expand_cleanups_to (NULL_TREE); - } - free_temp_slots (); - - if (TYPE_NEEDS_DESTRUCTOR (type)) - { - tree expr = build_component_ref (current_class_ref, name, NULL_TREE, explicit); - expr = build_delete (type, expr, integer_zero_node, - LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0); - - if (expr != error_mark_node) - add_partial_entry (expr); - } -} - -extern int warn_reorder; - -/* Subroutine of emit_member_init. */ - -static tree -sort_member_init (t) - tree t; -{ - tree x, member, name, field; - tree init_list = NULL_TREE; - int last_pos = 0; - tree last_field; - - for (member = TYPE_FIELDS (t); member ; member = TREE_CHAIN (member)) - { - int pos; - - /* member could be, for example, a CONST_DECL for an enumerated - tag; we don't want to try to initialize that, since it already - has a value. */ - if (TREE_CODE (member) != FIELD_DECL || !DECL_NAME (member)) - continue; - - for (x = current_member_init_list, pos = 0; x; x = TREE_CHAIN (x), ++pos) - { - /* If we cleared this out, then pay no attention to it. */ - if (TREE_PURPOSE (x) == NULL_TREE) - continue; - name = TREE_PURPOSE (x); - -#if 0 - /* This happens in templates, since the IDENTIFIER is replaced - with the COMPONENT_REF in tsubst_expr. */ - field = (TREE_CODE (name) == COMPONENT_REF - ? TREE_OPERAND (name, 1) : IDENTIFIER_CLASS_VALUE (name)); -#else - /* Let's find out when this happens. */ - my_friendly_assert (TREE_CODE (name) != COMPONENT_REF, 348); - field = IDENTIFIER_CLASS_VALUE (name); -#endif - - /* If one member shadows another, get the outermost one. */ - if (TREE_CODE (field) == TREE_LIST) - field = TREE_VALUE (field); - - if (field == member) - { - if (warn_reorder) - { - if (pos < last_pos) - { - cp_warning_at ("member initializers for `%#D'", last_field); - cp_warning_at (" and `%#D'", field); - warning (" will be re-ordered to match declaration order"); - } - last_pos = pos; - last_field = field; - } - - /* Make sure we won't try to work on this init again. */ - TREE_PURPOSE (x) = NULL_TREE; - x = build_tree_list (name, TREE_VALUE (x)); - goto got_it; - } - } - - /* If we didn't find MEMBER in the list, create a dummy entry - so the two lists (INIT_LIST and the list of members) will be - symmetrical. */ - x = build_tree_list (NULL_TREE, NULL_TREE); - got_it: - init_list = chainon (init_list, x); - } - - /* Initializers for base members go at the end. */ - for (x = current_member_init_list ; x ; x = TREE_CHAIN (x)) - { - name = TREE_PURPOSE (x); - if (name) - { - if (purpose_member (name, init_list)) - { - cp_error ("multiple initializations given for member `%D'", - IDENTIFIER_CLASS_VALUE (name)); - continue; - } - - init_list = chainon (init_list, - build_tree_list (name, TREE_VALUE (x))); - TREE_PURPOSE (x) = NULL_TREE; - } - } - - return init_list; -} - -static void -sort_base_init (t, rbase_ptr, vbase_ptr) - tree t, *rbase_ptr, *vbase_ptr; -{ - tree binfos = BINFO_BASETYPES (TYPE_BINFO (t)); - int n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; - - int i; - tree x; - tree last; - - /* For warn_reorder. */ - int last_pos = 0; - tree last_base = NULL_TREE; - - tree rbases = NULL_TREE; - tree vbases = NULL_TREE; - - /* First walk through and splice out vbase and invalid initializers. - Also replace names with binfos. */ - - last = tree_cons (NULL_TREE, NULL_TREE, current_base_init_list); - for (x = TREE_CHAIN (last); x; x = TREE_CHAIN (x)) - { - tree basetype = TREE_PURPOSE (x); - tree binfo; - - if (basetype == NULL_TREE) - { - /* Initializer for single base class. Must not - use multiple inheritance or this is ambiguous. */ - switch (n_baseclasses) - { - case 0: - cp_error ("`%T' does not have a base class to initialize", - current_class_type); - return; - case 1: - break; - default: - cp_error ("unnamed initializer ambiguous for `%T' which uses multiple inheritance", - current_class_type); - return; - } - binfo = TREE_VEC_ELT (binfos, 0); - } - else if (is_aggr_type (basetype, 1)) - { - binfo = binfo_or_else (basetype, t); - if (binfo == NULL_TREE) - continue; - - /* Virtual base classes are special cases. Their initializers - are recorded with this constructor, and they are used when - this constructor is the top-level constructor called. */ - if (TREE_VIA_VIRTUAL (binfo)) - { - tree v = CLASSTYPE_VBASECLASSES (t); - while (BINFO_TYPE (v) != BINFO_TYPE (binfo)) - v = TREE_CHAIN (v); - - vbases = tree_cons (v, TREE_VALUE (x), vbases); - continue; - } - else - { - /* Otherwise, if it is not an immediate base class, complain. */ - for (i = n_baseclasses-1; i >= 0; i--) - if (BINFO_TYPE (binfo) == BINFO_TYPE (TREE_VEC_ELT (binfos, i))) - break; - if (i < 0) - { - cp_error ("`%T' is not an immediate base class of `%T'", - basetype, current_class_type); - continue; - } - } - } - else - my_friendly_abort (365); - - TREE_PURPOSE (x) = binfo; - TREE_CHAIN (last) = x; - last = x; - } - TREE_CHAIN (last) = NULL_TREE; - - /* Now walk through our regular bases and make sure they're initialized. */ - - for (i = 0; i < n_baseclasses; ++i) - { - tree base_binfo = TREE_VEC_ELT (binfos, i); - int pos; - - if (TREE_VIA_VIRTUAL (base_binfo)) - continue; - - for (x = current_base_init_list, pos = 0; x; x = TREE_CHAIN (x), ++pos) - { - tree binfo = TREE_PURPOSE (x); - - if (binfo == NULL_TREE) - continue; - - if (binfo == base_binfo) - { - if (warn_reorder) - { - if (pos < last_pos) - { - cp_warning_at ("base initializers for `%#T'", last_base); - cp_warning_at (" and `%#T'", BINFO_TYPE (binfo)); - warning (" will be re-ordered to match inheritance order"); - } - last_pos = pos; - last_base = BINFO_TYPE (binfo); - } - - /* Make sure we won't try to work on this init again. */ - TREE_PURPOSE (x) = NULL_TREE; - x = build_tree_list (binfo, TREE_VALUE (x)); - goto got_it; - } - } - - /* If we didn't find BASE_BINFO in the list, create a dummy entry - so the two lists (RBASES and the list of bases) will be - symmetrical. */ - x = build_tree_list (NULL_TREE, NULL_TREE); - got_it: - rbases = chainon (rbases, x); - } - - *rbase_ptr = rbases; - *vbase_ptr = vbases; -} - -/* Perform partial cleanups for a base for exception handling. */ - -static tree -build_partial_cleanup_for (binfo) - tree binfo; -{ - tree expr = convert_pointer_to_real (binfo, - build_unary_op (ADDR_EXPR, current_class_ref, 0)); - - return build_delete (TREE_TYPE (expr), - expr, - integer_zero_node, - LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0); -} - -/* Perform whatever initializations have yet to be done on the base - class of the class variable. These actions are in the global - variable CURRENT_BASE_INIT_LIST. Such an action could be - NULL_TREE, meaning that the user has explicitly called the base - class constructor with no arguments. - - If there is a need for a call to a constructor, we must surround - that call with a pushlevel/poplevel pair, since we are technically - at the PARM level of scope. - - Argument IMMEDIATELY, if zero, forces a new sequence to be - generated to contain these new insns, so it can be emitted later. - This sequence is saved in the global variable BASE_INIT_EXPR. - Otherwise, the insns are emitted into the current sequence. - - Note that emit_base_init does *not* initialize virtual base - classes. That is done specially, elsewhere. */ - -extern tree base_init_expr, rtl_expr_chain; - -void -emit_base_init (t, immediately) - tree t; - int immediately; -{ - tree member; - tree mem_init_list; - tree rbase_init_list, vbase_init_list; - tree t_binfo = TYPE_BINFO (t); - tree binfos = BINFO_BASETYPES (t_binfo); - int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; - tree expr = NULL_TREE; - - if (! immediately) - { - int momentary; - do_pending_stack_adjust (); - /* Make the RTL_EXPR node temporary, not momentary, - so that rtl_expr_chain doesn't become garbage. */ - momentary = suspend_momentary (); - expr = make_node (RTL_EXPR); - resume_momentary (momentary); - start_sequence_for_rtl_expr (expr); - } - - if (write_symbols == NO_DEBUG) - /* As a matter of principle, `start_sequence' should do this. */ - emit_note (0, -1); - else - /* Always emit a line number note so we can step into constructors. */ - emit_line_note_force (DECL_SOURCE_FILE (current_function_decl), - DECL_SOURCE_LINE (current_function_decl)); - - mem_init_list = sort_member_init (t); - current_member_init_list = NULL_TREE; - - sort_base_init (t, &rbase_init_list, &vbase_init_list); - current_base_init_list = NULL_TREE; - - if (TYPE_USES_VIRTUAL_BASECLASSES (t)) - { - tree first_arg = TREE_CHAIN (DECL_ARGUMENTS (current_function_decl)); - - expand_start_cond (first_arg, 0); - expand_aggr_vbase_init (t_binfo, current_class_ref, current_class_ptr, - vbase_init_list); - expand_end_cond (); - } - - /* Now, perform initialization of non-virtual base classes. */ - for (i = 0; i < n_baseclasses; i++) - { - tree base_binfo = TREE_VEC_ELT (binfos, i); - tree init = void_list_node; - - if (TREE_VIA_VIRTUAL (base_binfo)) - continue; - -#if 0 /* Once unsharing happens soon enough. */ - my_friendly_assert (BINFO_INHERITANCE_CHAIN (base_binfo) == t_binfo, 999); -#else - BINFO_INHERITANCE_CHAIN (base_binfo) = t_binfo; -#endif - - if (TREE_PURPOSE (rbase_init_list)) - init = TREE_VALUE (rbase_init_list); - else if (TYPE_NEEDS_CONSTRUCTING (BINFO_TYPE (base_binfo))) - init = NULL_TREE; - - if (init != void_list_node) - { - extern int temp_slot_level; - extern int target_temp_slot_level; - tree old_cleanups = cleanups_this_call; - int old_temp_level = target_temp_slot_level; - push_temp_slots (); - push_temp_slots (); - target_temp_slot_level = temp_slot_level; - - member = convert_pointer_to_real (base_binfo, current_class_ptr); - expand_aggr_init_1 (base_binfo, NULL_TREE, - build_indirect_ref (member, NULL_PTR), init, - BINFO_OFFSET_ZEROP (base_binfo), LOOKUP_NORMAL); - expand_cleanups_to (old_cleanups); - pop_temp_slots (); - pop_temp_slots (); - target_temp_slot_level = old_temp_level; - /* There might something left from building the trees. */ - if (cleanups_this_call) - { - expand_cleanups_to (NULL_TREE); - } - free_temp_slots (); - } - - if (TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo))) - { - tree expr; - - /* All cleanups must be on the function_obstack. */ - push_obstacks_nochange (); - resume_temporary_allocation (); - expr = build_partial_cleanup_for (base_binfo); - pop_obstacks (); - add_partial_entry (expr); - } - - rbase_init_list = TREE_CHAIN (rbase_init_list); - } - - /* Initialize all the virtual function table fields that - do come from virtual base classes. */ - if (TYPE_USES_VIRTUAL_BASECLASSES (t)) - expand_indirect_vtbls_init (t_binfo, current_class_ref, current_class_ptr); - - /* Initialize all the virtual function table fields that - do not come from virtual base classes. */ - expand_direct_vtbls_init (t_binfo, t_binfo, 1, 1, current_class_ptr); - - for (member = TYPE_FIELDS (t); member; member = TREE_CHAIN (member)) - { - tree init, name; - int from_init_list; - - /* member could be, for example, a CONST_DECL for an enumerated - tag; we don't want to try to initialize that, since it already - has a value. */ - if (TREE_CODE (member) != FIELD_DECL || !DECL_NAME (member)) - continue; - - /* See if we had a user-specified member initialization. */ - if (TREE_PURPOSE (mem_init_list)) - { - name = TREE_PURPOSE (mem_init_list); - init = TREE_VALUE (mem_init_list); - from_init_list = 1; - -#if 0 - if (TREE_CODE (name) == COMPONENT_REF) - name = DECL_NAME (TREE_OPERAND (name, 1)); -#else - /* Also see if it's ever a COMPONENT_REF here. If it is, we - need to do `expand_assignment (name, init, 0, 0);' and - a continue. */ - my_friendly_assert (TREE_CODE (name) != COMPONENT_REF, 349); -#endif - } - else - { - name = DECL_NAME (member); - init = DECL_INITIAL (member); - - from_init_list = 0; - } - - perform_member_init (member, name, init, from_init_list); - mem_init_list = TREE_CHAIN (mem_init_list); - } - - /* Now initialize any members from our bases. */ - while (mem_init_list) - { - tree name, init, field; - - if (TREE_PURPOSE (mem_init_list)) - { - name = TREE_PURPOSE (mem_init_list); - init = TREE_VALUE (mem_init_list); - /* XXX: this may need the COMPONENT_REF operand 0 check if - it turns out we actually get them. */ - field = IDENTIFIER_CLASS_VALUE (name); - - /* If one member shadows another, get the outermost one. */ - if (TREE_CODE (field) == TREE_LIST) - { - field = TREE_VALUE (field); - if (decl_type_context (field) != current_class_type) - cp_error ("field `%D' not in immediate context", field); - } - -#if 0 - /* It turns out if you have an anonymous union in the - class, a member from it can end up not being on the - list of fields (rather, the type is), and therefore - won't be seen by the for loop above. */ - - /* The code in this for loop is derived from a general loop - which had this check in it. Theoretically, we've hit - every initialization for the list of members in T, so - we shouldn't have anything but these left in this list. */ - my_friendly_assert (DECL_FIELD_CONTEXT (field) != t, 351); -#endif - - perform_member_init (field, name, init, 1); - } - mem_init_list = TREE_CHAIN (mem_init_list); - } - - if (! immediately) - { - do_pending_stack_adjust (); - my_friendly_assert (base_init_expr == 0, 207); - base_init_expr = expr; - TREE_TYPE (expr) = void_type_node; - RTL_EXPR_RTL (expr) = const0_rtx; - RTL_EXPR_SEQUENCE (expr) = get_insns (); - rtl_expr_chain = tree_cons (NULL_TREE, expr, rtl_expr_chain); - end_sequence (); - TREE_SIDE_EFFECTS (expr) = 1; - } - - /* All the implicit try blocks we built up will be zapped - when we come to a real binding contour boundary. */ -} - -/* Check that all fields are properly initialized after - an assignment to `this'. */ - -void -check_base_init (t) - tree t; -{ - tree member; - for (member = TYPE_FIELDS (t); member; member = TREE_CHAIN (member)) - if (DECL_NAME (member) && TREE_USED (member)) - cp_error ("field `%D' used before initialized (after assignment to `this')", - member); -} - -/* This code sets up the virtual function tables appropriate for - the pointer DECL. It is a one-ply initialization. - - BINFO is the exact type that DECL is supposed to be. In - multiple inheritance, this might mean "C's A" if C : A, B. */ - -static void -expand_virtual_init (binfo, decl) - tree binfo, decl; -{ - tree type = BINFO_TYPE (binfo); - tree vtbl, vtbl_ptr; - tree vtype, vtype_binfo; - - /* This code is crusty. Should be simple, like: - vtbl = BINFO_VTABLE (binfo); - */ - vtype = DECL_CONTEXT (CLASSTYPE_VFIELD (type)); - vtype_binfo = get_binfo (vtype, TREE_TYPE (TREE_TYPE (decl)), 0); - vtbl = BINFO_VTABLE (binfo_value (DECL_FIELD_CONTEXT (CLASSTYPE_VFIELD (type)), binfo)); - assemble_external (vtbl); - TREE_USED (vtbl) = 1; - vtbl = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (vtbl)), vtbl); - decl = convert_pointer_to_real (vtype_binfo, decl); - vtbl_ptr = build_vfield_ref (build_indirect_ref (decl, NULL_PTR), vtype); - if (vtbl_ptr == error_mark_node) - return; - - /* Have to convert VTBL since array sizes may be different. */ - vtbl = convert_force (TREE_TYPE (vtbl_ptr), vtbl, 0); - expand_expr_stmt (build_modify_expr (vtbl_ptr, NOP_EXPR, vtbl)); -} - -/* Subroutine of `expand_aggr_vbase_init'. - BINFO is the binfo of the type that is being initialized. - INIT_LIST is the list of initializers for the virtual baseclass. */ - -static void -expand_aggr_vbase_init_1 (binfo, exp, addr, init_list) - tree binfo, exp, addr, init_list; -{ - tree init = purpose_member (binfo, init_list); - tree ref = build_indirect_ref (addr, NULL_PTR); - - extern int temp_slot_level; - extern int target_temp_slot_level; - tree old_cleanups = cleanups_this_call; - int old_temp_level = target_temp_slot_level; - push_temp_slots (); - push_temp_slots (); - target_temp_slot_level = temp_slot_level; - - if (init) - init = TREE_VALUE (init); - /* Call constructors, but don't set up vtables. */ - expand_aggr_init_1 (binfo, exp, ref, init, 0, LOOKUP_COMPLAIN); - - expand_cleanups_to (old_cleanups); - pop_temp_slots (); - pop_temp_slots (); - target_temp_slot_level = old_temp_level; - /* There might something left from building the trees. */ - if (cleanups_this_call) - { - expand_cleanups_to (NULL_TREE); - } - free_temp_slots (); -} - -/* Initialize this object's virtual base class pointers. This must be - done only at the top-level of the object being constructed. - - INIT_LIST is list of initialization for constructor to perform. */ - -static void -expand_aggr_vbase_init (binfo, exp, addr, init_list) - tree binfo; - tree exp; - tree addr; - tree init_list; -{ - tree type = BINFO_TYPE (binfo); - - if (TYPE_USES_VIRTUAL_BASECLASSES (type)) - { - tree result = init_vbase_pointers (type, addr); - tree vbases; - - if (result) - expand_expr_stmt (build_compound_expr (result)); - - for (vbases = CLASSTYPE_VBASECLASSES (type); vbases; - vbases = TREE_CHAIN (vbases)) - { - tree tmp = purpose_member (vbases, result); - expand_aggr_vbase_init_1 (vbases, exp, - TREE_OPERAND (TREE_VALUE (tmp), 0), - init_list); - } - } -} - -/* Subroutine to perform parser actions for member initialization. - S_ID is the scoped identifier. - NAME is the name of the member. - INIT is the initializer, or `void_type_node' if none. */ - -void -do_member_init (s_id, name, init) - tree s_id, name, init; -{ - tree binfo, base; - - if (current_class_type == NULL_TREE - || ! is_aggr_typedef (s_id, 1)) - return; - binfo = get_binfo (IDENTIFIER_TYPE_VALUE (s_id), - current_class_type, 1); - if (binfo == error_mark_node) - return; - if (binfo == 0) - { - error_not_base_type (IDENTIFIER_TYPE_VALUE (s_id), current_class_type); - return; - } - - base = convert_pointer_to (binfo, current_class_ptr); - expand_member_init (build_indirect_ref (base, NULL_PTR), name, init); -} - -/* Find the context in which this FIELD can be initialized. */ - -static tree -initializing_context (field) - tree field; -{ - tree t = DECL_CONTEXT (field); - - /* Anonymous union members can be initialized in the first enclosing - non-anonymous union context. */ - while (t && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t))) - t = TYPE_CONTEXT (t); - return t; -} - -/* Function to give error message if member initialization specification - is erroneous. FIELD is the member we decided to initialize. - TYPE is the type for which the initialization is being performed. - FIELD must be a member of TYPE. - - MEMBER_NAME is the name of the member. */ - -static int -member_init_ok_or_else (field, type, member_name) - tree field; - tree type; - char *member_name; -{ - if (field == error_mark_node) - return 0; - if (field == NULL_TREE || initializing_context (field) != type) - { - cp_error ("class `%T' does not have any field named `%s'", type, - member_name); - return 0; - } - if (TREE_STATIC (field)) - { - cp_error ("field `%#D' is static; only point of initialization is its declaration", - field); - return 0; - } - - return 1; -} - -/* If NAME is a viable field name for the aggregate DECL, - and PARMS is a viable parameter list, then expand an _EXPR - which describes this initialization. - - Note that we do not need to chase through the class's base classes - to look for NAME, because if it's in that list, it will be handled - by the constructor for that base class. - - We do not yet have a fixed-point finder to instantiate types - being fed to overloaded constructors. If there is a unique - constructor, then argument types can be got from that one. - - If INIT is non-NULL, then it the initialization should - be placed in `current_base_init_list', where it will be processed - by `emit_base_init'. */ - -void -expand_member_init (exp, name, init) - tree exp, name, init; -{ - extern tree ptr_type_node; /* should be in tree.h */ - - tree basetype = NULL_TREE, field; - tree parm; - tree rval, type; - - if (exp == NULL_TREE) - return; /* complain about this later */ - - type = TYPE_MAIN_VARIANT (TREE_TYPE (exp)); - - if (name && TREE_CODE (name) == TYPE_DECL) - { - basetype = TREE_TYPE (name); - name = DECL_NAME (name); - } - - if (name == NULL_TREE && IS_AGGR_TYPE (type)) - switch (CLASSTYPE_N_BASECLASSES (type)) - { - case 0: - error ("base class initializer specified, but no base class to initialize"); - return; - case 1: - basetype = TYPE_BINFO_BASETYPE (type, 0); - break; - default: - error ("initializer for unnamed base class ambiguous"); - cp_error ("(type `%T' uses multiple inheritance)", type); - return; - } - - if (init) - { - /* The grammar should not allow fields which have names - that are TYPENAMEs. Therefore, if the field has - a non-NULL TREE_TYPE, we may assume that this is an - attempt to initialize a base class member of the current - type. Otherwise, it is an attempt to initialize a - member field. */ - - if (init == void_type_node) - init = NULL_TREE; - - if (name == NULL_TREE || basetype) - { - tree base_init; - - if (name == NULL_TREE) - { -#if 0 - if (basetype) - name = TYPE_IDENTIFIER (basetype); - else - { - error ("no base class to initialize"); - return; - } -#endif - } - else - { - if (basetype != type - && ! vec_binfo_member (basetype, TYPE_BINFO_BASETYPES (type)) - && ! binfo_member (basetype, CLASSTYPE_VBASECLASSES (type))) - { - if (IDENTIFIER_CLASS_VALUE (name)) - goto try_member; - if (TYPE_USES_VIRTUAL_BASECLASSES (type)) - cp_error ("type `%T' is not an immediate or virtual basetype for `%T'", - basetype, type); - else - cp_error ("type `%T' is not an immediate basetype for `%T'", - basetype, type); - return; - } - } - - if (purpose_member (basetype, current_base_init_list)) - { - cp_error ("base class `%T' already initialized", basetype); - return; - } - - if (warn_reorder && current_member_init_list) - { - cp_warning ("base initializer for `%T'", basetype); - warning (" will be re-ordered to precede member initializations"); - } - - base_init = build_tree_list (basetype, init); - current_base_init_list = chainon (current_base_init_list, base_init); - } - else - { - tree member_init; - - try_member: - field = lookup_field (type, name, 1, 0); - - if (! member_init_ok_or_else (field, type, IDENTIFIER_POINTER (name))) - return; - - if (purpose_member (name, current_member_init_list)) - { - cp_error ("field `%D' already initialized", field); - return; - } - - member_init = build_tree_list (name, init); - current_member_init_list = chainon (current_member_init_list, member_init); - } - return; - } - else if (name == NULL_TREE) - { - compiler_error ("expand_member_init: name == NULL_TREE"); - return; - } - - basetype = type; - field = lookup_field (basetype, name, 0, 0); - - if (! member_init_ok_or_else (field, basetype, IDENTIFIER_POINTER (name))) - return; - - /* now see if there is a constructor for this type - which will take these args. */ - - if (TYPE_HAS_CONSTRUCTOR (TREE_TYPE (field))) - { - tree parmtypes, fndecl; - - if (TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == PARM_DECL) - { - /* just know that we've seen something for this node */ - DECL_INITIAL (exp) = error_mark_node; - TREE_USED (exp) = 1; - } - type = TYPE_MAIN_VARIANT (TREE_TYPE (field)); - parm = build_component_ref (exp, name, NULL_TREE, 0); - - /* Now get to the constructors. */ - fndecl = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), 0); - - if (fndecl) - my_friendly_assert (TREE_CODE (fndecl) == FUNCTION_DECL, 209); - - /* If the field is unique, we can use the parameter - types to guide possible type instantiation. */ - if (DECL_CHAIN (fndecl) == NULL_TREE) - { - /* There was a confusion here between - FIELD and FNDECL. The following code - should be correct, but abort is here - to make sure. */ - my_friendly_abort (48); - parmtypes = FUNCTION_ARG_CHAIN (fndecl); - } - else - { - parmtypes = NULL_TREE; - fndecl = NULL_TREE; - } - - init = convert_arguments (parm, parmtypes, NULL_TREE, fndecl, LOOKUP_NORMAL); - if (init == NULL_TREE || TREE_TYPE (init) != error_mark_node) - rval = build_method_call (NULL_TREE, ctor_identifier, init, - TYPE_BINFO (type), LOOKUP_NORMAL); - else - return; - - if (rval != error_mark_node) - { - /* Now, fill in the first parm with our guy */ - TREE_VALUE (TREE_OPERAND (rval, 1)) - = build_unary_op (ADDR_EXPR, parm, 0); - TREE_TYPE (rval) = ptr_type_node; - TREE_SIDE_EFFECTS (rval) = 1; - } - } - else if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (field))) - { - parm = build_component_ref (exp, name, NULL_TREE, 0); - expand_aggr_init (parm, NULL_TREE, 0, 0); - rval = error_mark_node; - } - - /* Now initialize the member. It does not have to - be of aggregate type to receive initialization. */ - if (rval != error_mark_node) - expand_expr_stmt (rval); -} - -/* This is like `expand_member_init', only it stores one aggregate - value into another. - - INIT comes in two flavors: it is either a value which - is to be stored in EXP, or it is a parameter list - to go to a constructor, which will operate on EXP. - If INIT is not a parameter list for a constructor, then set - LOOKUP_ONLYCONVERTING. - If FLAGS is LOOKUP_ONLYCONVERTING then it is the = init form of - the initializer, if FLAGS is 0, then it is the (init) form. - If `init' is a CONSTRUCTOR, then we emit a warning message, - explaining that such initializations are invalid. - - ALIAS_THIS is nonzero iff we are initializing something which is - essentially an alias for current_class_ref. In this case, the base - constructor may move it on us, and we must keep track of such - deviations. - - If INIT resolves to a CALL_EXPR which happens to return - something of the type we are looking for, then we know - that we can safely use that call to perform the - initialization. - - The virtual function table pointer cannot be set up here, because - we do not really know its type. - - Virtual baseclass pointers are also set up here. - - This never calls operator=(). - - When initializing, nothing is CONST. - - A default copy constructor may have to be used to perform the - initialization. - - A constructor or a conversion operator may have to be used to - perform the initialization, but not both, as it would be ambiguous. */ - -void -expand_aggr_init (exp, init, alias_this, flags) - tree exp, init; - int alias_this; - int flags; -{ - tree type = TREE_TYPE (exp); - int was_const = TREE_READONLY (exp); - int was_volatile = TREE_THIS_VOLATILE (exp); - - if (init == error_mark_node) - return; - - TREE_READONLY (exp) = 0; - TREE_THIS_VOLATILE (exp) = 0; - - if (init && TREE_CODE (init) != TREE_LIST) - flags |= LOOKUP_ONLYCONVERTING; - - if (TREE_CODE (type) == ARRAY_TYPE) - { - /* Must arrange to initialize each element of EXP - from elements of INIT. */ - tree itype = init ? TREE_TYPE (init) : NULL_TREE; - if (TYPE_READONLY (TREE_TYPE (type)) || TYPE_VOLATILE (TREE_TYPE (type))) - { - TREE_TYPE (exp) = TYPE_MAIN_VARIANT (type); - if (init) - TREE_TYPE (init) = TYPE_MAIN_VARIANT (itype); - } - if (init && TREE_TYPE (init) == NULL_TREE) - { - /* Handle bad initializers like: - class COMPLEX { - public: - double re, im; - COMPLEX(double r = 0.0, double i = 0.0) {re = r; im = i;}; - ~COMPLEX() {}; - }; - - int main(int argc, char **argv) { - COMPLEX zees(1.0, 0.0)[10]; - } - */ - error ("bad array initializer"); - return; - } - expand_vec_init (exp, exp, array_type_nelts (type), init, - init && comptypes (TREE_TYPE (init), TREE_TYPE (exp), 1)); - TREE_READONLY (exp) = was_const; - TREE_THIS_VOLATILE (exp) = was_volatile; - TREE_TYPE (exp) = type; - if (init) - TREE_TYPE (init) = itype; - return; - } - - if (TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == PARM_DECL) - /* just know that we've seen something for this node */ - TREE_USED (exp) = 1; - -#if 0 - /* If initializing from a GNU C CONSTRUCTOR, consider the elts in the - constructor as parameters to an implicit GNU C++ constructor. */ - if (init && TREE_CODE (init) == CONSTRUCTOR - && TYPE_HAS_CONSTRUCTOR (type) - && TREE_TYPE (init) == type) - init = CONSTRUCTOR_ELTS (init); -#endif - - TREE_TYPE (exp) = TYPE_MAIN_VARIANT (type); - expand_aggr_init_1 (TYPE_BINFO (type), exp, exp, - init, alias_this, LOOKUP_NORMAL|flags); - TREE_TYPE (exp) = type; - TREE_READONLY (exp) = was_const; - TREE_THIS_VOLATILE (exp) = was_volatile; -} - -static void -expand_default_init (binfo, true_exp, exp, init, alias_this, flags) - tree binfo; - tree true_exp, exp; - tree init; - int alias_this; - int flags; -{ - tree type = TREE_TYPE (exp); - - /* It fails because there may not be a constructor which takes - its own type as the first (or only parameter), but which does - take other types via a conversion. So, if the thing initializing - the expression is a unit element of type X, first try X(X&), - followed by initialization by X. If neither of these work - out, then look hard. */ - tree rval; - tree parms; - - if (flag_ansi_overloading && init && TREE_CODE (init) != TREE_LIST - && (flags & LOOKUP_ONLYCONVERTING)) - { - /* Base subobjects should only get direct-initialization. */ - if (true_exp != exp) - abort (); - - /* We special-case TARGET_EXPRs here to avoid an error about - private copy constructors for temporaries bound to reference vars. - If the TARGET_EXPR represents a call to a function that has - permission to create such objects, a reference can bind directly - to the return value. An object variable must be initialized - via the copy constructor, even if the call is elided. */ - if (! (TREE_CODE (exp) == VAR_DECL && DECL_ARTIFICIAL (exp) - && TREE_CODE (init) == TARGET_EXPR && TREE_TYPE (init) == type)) - init = cp_convert (type, init, CONV_IMPLICIT|CONV_FORCE_TEMP, flags); - - expand_assignment (exp, init, 0, 0); - return; - } - - if (init == NULL_TREE - || (TREE_CODE (init) == TREE_LIST && ! TREE_TYPE (init))) - { - parms = init; - if (parms) - init = TREE_VALUE (parms); - } - else if (! flag_ansi_overloading - && TREE_CODE (init) == INDIRECT_REF && TREE_HAS_CONSTRUCTOR (init) - && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (init))) - { - rval = convert_for_initialization (exp, type, init, 0, 0, 0, 0); - TREE_USED (rval) = 1; - expand_expr_stmt (rval); - return; - } - else - parms = build_tree_list (NULL_TREE, init); - - if (TYPE_USES_VIRTUAL_BASECLASSES (type)) - { - if (true_exp == exp) - parms = tree_cons (NULL_TREE, integer_one_node, parms); - else - parms = tree_cons (NULL_TREE, integer_zero_node, parms); - flags |= LOOKUP_HAS_IN_CHARGE; - } - - if (flag_ansi_overloading) - { - rval = build_method_call (exp, ctor_identifier, - parms, binfo, flags); - expand_expr_stmt (rval); - return; - } - - if (init && TREE_CHAIN (parms) == NULL_TREE - && TYPE_HAS_TRIVIAL_INIT_REF (type) - && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (init))) - { - rval = build (INIT_EXPR, type, exp, init); - TREE_SIDE_EFFECTS (rval) = 1; - expand_expr_stmt (rval); - } - else - { - if (flags & LOOKUP_ONLYCONVERTING) - flags |= LOOKUP_NO_CONVERSION; - rval = build_method_call (exp, ctor_identifier, - parms, binfo, flags); - - /* Private, protected, or otherwise unavailable. */ - if (rval == error_mark_node) - { - if (flags & LOOKUP_COMPLAIN) - cp_error ("in base initialization for %sclass `%T'", - TREE_VIA_VIRTUAL (binfo) ? "virtual base " : "", - binfo); - } - else if (rval == NULL_TREE) - my_friendly_abort (361); - else - { - /* p. 222: if the base class assigns to `this', then that - value is used in the derived class. */ - if ((flag_this_is_variable & 1) && alias_this) - { - TREE_TYPE (rval) = TREE_TYPE (current_class_ptr); - expand_assignment (current_class_ptr, rval, 0, 0); - } - else - expand_expr_stmt (rval); - } - } -} - -/* This function is responsible for initializing EXP with INIT - (if any). - - BINFO is the binfo of the type for who we are performing the - initialization. For example, if W is a virtual base class of A and B, - and C : A, B. - If we are initializing B, then W must contain B's W vtable, whereas - were we initializing C, W must contain C's W vtable. - - TRUE_EXP is nonzero if it is the true expression being initialized. - In this case, it may be EXP, or may just contain EXP. The reason we - need this is because if EXP is a base element of TRUE_EXP, we - don't necessarily know by looking at EXP where its virtual - baseclass fields should really be pointing. But we do know - from TRUE_EXP. In constructors, we don't know anything about - the value being initialized. - - ALIAS_THIS serves the same purpose it serves for expand_aggr_init. - - FLAGS is just passes to `build_method_call'. See that function for - its description. */ - -static void -expand_aggr_init_1 (binfo, true_exp, exp, init, alias_this, flags) - tree binfo; - tree true_exp, exp; - tree init; - int alias_this; - int flags; -{ - tree type = TREE_TYPE (exp); - tree init_type = NULL_TREE; - - my_friendly_assert (init != error_mark_node && type != error_mark_node, 211); - - /* Use a function returning the desired type to initialize EXP for us. - If the function is a constructor, and its first argument is - NULL_TREE, know that it was meant for us--just slide exp on - in and expand the constructor. Constructors now come - as TARGET_EXPRs. */ - - if (init && TREE_CODE (exp) == VAR_DECL - && TREE_CODE (init) == CONSTRUCTOR - && TREE_HAS_CONSTRUCTOR (init)) - { - tree t = store_init_value (exp, init); - if (!t) - { - expand_decl_init (exp); - return; - } - t = build (INIT_EXPR, type, exp, init); - TREE_SIDE_EFFECTS (t) = 1; - expand_expr_stmt (t); - return; - } - - if (init && ! flag_ansi_overloading) - { - tree init_list = NULL_TREE; - - if (TREE_CODE (init) == TREE_LIST) - { - init_list = init; - if (TREE_CHAIN (init) == NULL_TREE) - init = TREE_VALUE (init); - } - - init_type = TREE_TYPE (init); - - if (TREE_CODE (init) != TREE_LIST) - { - if (TREE_CODE (init_type) == ERROR_MARK) - return; - - /* This happens when we use C++'s functional cast notation. - If the types match, then just use the TARGET_EXPR - directly. Otherwise, we need to create the initializer - separately from the object being initialized. */ - if (TREE_CODE (init) == TARGET_EXPR) - { - if (TYPE_MAIN_VARIANT (init_type) == TYPE_MAIN_VARIANT (type)) - { - if (TREE_CODE (exp) == VAR_DECL - || TREE_CODE (exp) == RESULT_DECL) - /* Unify the initialization targets. */ - DECL_RTL (TREE_OPERAND (init, 0)) = DECL_RTL (exp); - else - DECL_RTL (TREE_OPERAND (init, 0)) = expand_expr (exp, NULL_RTX, VOIDmode, 0); - - expand_expr_stmt (init); - return; - } - } - - if (init_type == type && TREE_CODE (init) == CALL_EXPR) - { - /* A CALL_EXPR is a legitimate form of initialization, so - we should not print this warning message. */ - - expand_assignment (exp, init, 0, 0); - if (exp == DECL_RESULT (current_function_decl)) - { - /* Failing this assertion means that the return value - from receives multiple initializations. */ - my_friendly_assert (DECL_INITIAL (exp) == NULL_TREE - || DECL_INITIAL (exp) == error_mark_node, - 212); - DECL_INITIAL (exp) = init; - } - return; - } - else if (init_type == type - && TREE_CODE (init) == COND_EXPR) - { - /* Push value to be initialized into the cond, where possible. - Avoid spurious warning messages when initializing the - result of this function. */ - TREE_OPERAND (init, 1) - = build_modify_expr (exp, INIT_EXPR, TREE_OPERAND (init, 1)); - if (exp == DECL_RESULT (current_function_decl)) - DECL_INITIAL (exp) = NULL_TREE; - TREE_OPERAND (init, 2) - = build_modify_expr (exp, INIT_EXPR, TREE_OPERAND (init, 2)); - if (exp == DECL_RESULT (current_function_decl)) - DECL_INITIAL (exp) = init; - TREE_SIDE_EFFECTS (init) = 1; - expand_expr (init, const0_rtx, VOIDmode, 0); - free_temp_slots (); - return; - } - } - - /* We did not know what we were initializing before. Now we do. */ - if (TREE_CODE (init) == TARGET_EXPR) - { - tree tmp = TREE_OPERAND (TREE_OPERAND (init, 1), 1); - - if (tmp && TREE_CODE (TREE_VALUE (tmp)) == NOP_EXPR - && TREE_OPERAND (TREE_VALUE (tmp), 0) == integer_zero_node) - { - /* In order for this to work for RESULT_DECLs, if their - type has a constructor, then they must be BLKmode - so that they will be meaningfully addressable. */ - tree arg = build_unary_op (ADDR_EXPR, exp, 0); - init = TREE_OPERAND (init, 1); - init = build (CALL_EXPR, build_pointer_type (TREE_TYPE (init)), - TREE_OPERAND (init, 0), TREE_OPERAND (init, 1), NULL_TREE); - TREE_SIDE_EFFECTS (init) = 1; - TREE_VALUE (TREE_OPERAND (init, 1)) - = convert_pointer_to (TREE_TYPE (TREE_TYPE (TREE_VALUE (tmp))), arg); - - if (alias_this) - { - expand_assignment (current_function_decl, init, 0, 0); - return; - } - if (exp == DECL_RESULT (current_function_decl)) - { - if (DECL_INITIAL (DECL_RESULT (current_function_decl))) - fatal ("return value from function receives multiple initializations"); - DECL_INITIAL (exp) = init; - } - expand_expr_stmt (init); - return; - } - } - - /* Handle this case: when calling a constructor: xyzzy foo(bar); - which really means: xyzzy foo = bar; Ugh! - - More useful for this case: xyzzy *foo = new xyzzy (bar); */ - - if (! TYPE_NEEDS_CONSTRUCTING (type) && ! IS_AGGR_TYPE (type)) - { - if (init_list && TREE_CHAIN (init_list)) - { - warning ("initializer list being treated as compound expression"); - init = convert (type, build_compound_expr (init_list)); - if (init == error_mark_node) - return; - } - - expand_assignment (exp, init, 0, 0); - - return; - } - - /* If this is copy-initialization, see whether we can go through a - type conversion operator. */ - if (TREE_CODE (init) != TREE_LIST && (flags & LOOKUP_ONLYCONVERTING)) - { - tree ttype = TREE_CODE (init_type) == REFERENCE_TYPE - ? TREE_TYPE (init_type) : init_type; - - if (ttype != type && IS_AGGR_TYPE (ttype)) - { - tree rval = build_type_conversion (CONVERT_EXPR, type, init, 1); - - if (rval) - { - /* See if there is a constructor for``type'' that takes a - ``ttype''-typed object. */ - tree parms = build_tree_list (NULL_TREE, init); - tree as_cons = NULL_TREE; - if (TYPE_HAS_CONSTRUCTOR (type)) - as_cons = build_method_call (exp, ctor_identifier, - parms, binfo, - LOOKUP_SPECULATIVELY|LOOKUP_NO_CONVERSION); - if (as_cons != NULL_TREE && as_cons != error_mark_node) - /* ANSI C++ June 5 1992 WP 12.3.2.6.1 */ - cp_error ("ambiguity between conversion to `%T' and constructor", - type); - else - if (rval != error_mark_node) - expand_aggr_init_1 (binfo, true_exp, exp, rval, alias_this, flags); - return; - } - } - } - } - - /* We know that expand_default_init can handle everything we want - at this point. */ - expand_default_init (binfo, true_exp, exp, init, alias_this, flags); -} - -/* Report an error if NAME is not the name of a user-defined, - aggregate type. If OR_ELSE is nonzero, give an error message. */ - -int -is_aggr_typedef (name, or_else) - tree name; - int or_else; -{ - tree type; - - if (name == error_mark_node) - return 0; - - if (IDENTIFIER_HAS_TYPE_VALUE (name)) - type = IDENTIFIER_TYPE_VALUE (name); - else - { - if (or_else) - cp_error ("`%T' is not an aggregate typedef", name); - return 0; - } - - if (! IS_AGGR_TYPE (type) - && TREE_CODE (type) != TEMPLATE_TYPE_PARM) - { - if (or_else) - cp_error ("`%T' is not an aggregate type", type); - return 0; - } - return 1; -} - -/* Report an error if TYPE is not a user-defined, aggregate type. If - OR_ELSE is nonzero, give an error message. */ - -int -is_aggr_type (type, or_else) - tree type; - int or_else; -{ - if (type == error_mark_node) - return 0; - - if (! IS_AGGR_TYPE (type) - && TREE_CODE (type) != TEMPLATE_TYPE_PARM) - { - if (or_else) - cp_error ("`%T' is not an aggregate type", type); - return 0; - } - return 1; -} - -/* Like is_aggr_typedef, but returns typedef if successful. */ - -tree -get_aggr_from_typedef (name, or_else) - tree name; - int or_else; -{ - tree type; - - if (name == error_mark_node) - return NULL_TREE; - - if (IDENTIFIER_HAS_TYPE_VALUE (name)) - type = IDENTIFIER_TYPE_VALUE (name); - else - { - if (or_else) - cp_error ("`%T' fails to be an aggregate typedef", name); - return NULL_TREE; - } - - if (! IS_AGGR_TYPE (type) - && TREE_CODE (type) != TEMPLATE_TYPE_PARM) - { - if (or_else) - cp_error ("type `%T' is of non-aggregate type", type); - return NULL_TREE; - } - return type; -} - -tree -get_type_value (name) - tree name; -{ - if (name == error_mark_node) - return NULL_TREE; - - if (IDENTIFIER_HAS_TYPE_VALUE (name)) - return IDENTIFIER_TYPE_VALUE (name); - else - return NULL_TREE; -} - - -/* This code could just as well go in `class.c', but is placed here for - modularity. */ - -/* For an expression of the form TYPE :: NAME (PARMLIST), build - the appropriate function call. */ - -tree -build_member_call (type, name, parmlist) - tree type, name, parmlist; -{ - tree t; - tree method_name = name; - int dtor = 0; - int dont_use_this = 0; - tree basetype_path, decl; - - if (TREE_CODE (method_name) == BIT_NOT_EXPR) - { - method_name = TREE_OPERAND (method_name, 0); - dtor = 1; - } - - /* This shouldn't be here, and build_member_call shouldn't appear in - parse.y! (mrs) */ - if (type && TREE_CODE (type) == IDENTIFIER_NODE - && get_aggr_from_typedef (type, 0) == 0) - { - tree ns = lookup_name (type, 0); - if (ns && TREE_CODE (ns) == NAMESPACE_DECL) - { - return build_x_function_call (build_offset_ref (type, name), parmlist, current_class_ref); - } - } - - if (type == NULL_TREE || ! is_aggr_type (type, 1)) - return error_mark_node; - - /* An operator we did not like. */ - if (name == NULL_TREE) - return error_mark_node; - - if (dtor) - { - cp_error ("cannot call destructor `%T::~%T' without object", type, - method_name); - return error_mark_node; - } - - /* No object? Then just fake one up, and let build_method_call - figure out what to do. */ - if (current_class_type == 0 - || get_base_distance (type, current_class_type, 0, &basetype_path) == -1) - dont_use_this = 1; - - if (dont_use_this) - { - basetype_path = TYPE_BINFO (type); - decl = build1 (NOP_EXPR, build_pointer_type (type), error_mark_node); - } - else if (current_class_ptr == 0) - { - dont_use_this = 1; - decl = build1 (NOP_EXPR, build_pointer_type (type), error_mark_node); - } - else - { - tree olddecl = current_class_ptr; - tree oldtype = TREE_TYPE (TREE_TYPE (olddecl)); - if (oldtype != type) - { - tree newtype = build_type_variant (type, TYPE_READONLY (oldtype), - TYPE_VOLATILE (oldtype)); - decl = convert_force (build_pointer_type (newtype), olddecl, 0); - } - else - decl = olddecl; - } - - decl = build_indirect_ref (decl, NULL_PTR); - - if (method_name == constructor_name (type) - || method_name == constructor_name_full (type)) - return build_functional_cast (type, parmlist); - if (t = lookup_fnfields (basetype_path, method_name, 0)) - return build_method_call (decl, method_name, parmlist, basetype_path, - LOOKUP_NORMAL|LOOKUP_NONVIRTUAL); - if (TREE_CODE (name) == IDENTIFIER_NODE - && ((t = lookup_field (TYPE_BINFO (type), name, 1, 0)))) - { - if (t == error_mark_node) - return error_mark_node; - if (TREE_CODE (t) == FIELD_DECL) - { - if (dont_use_this) - { - cp_error ("invalid use of non-static field `%D'", t); - return error_mark_node; - } - decl = build (COMPONENT_REF, TREE_TYPE (t), decl, t); - } - else if (TREE_CODE (t) == VAR_DECL) - decl = t; - else - { - cp_error ("invalid use of member `%D'", t); - return error_mark_node; - } - if (TYPE_LANG_SPECIFIC (TREE_TYPE (decl)) - && TYPE_OVERLOADS_CALL_EXPR (TREE_TYPE (decl))) - return build_opfncall (CALL_EXPR, LOOKUP_NORMAL, decl, parmlist, NULL_TREE); - return build_function_call (decl, parmlist); - } - else - { - cp_error ("no method `%T::%D'", type, name); - return error_mark_node; - } -} - -/* Build a reference to a member of an aggregate. This is not a - C++ `&', but really something which can have its address taken, - and then act as a pointer to member, for example TYPE :: FIELD - can have its address taken by saying & TYPE :: FIELD. - - @@ Prints out lousy diagnostics for operator <typename> - @@ fields. - - @@ This function should be rewritten and placed in search.c. */ - -tree -build_offset_ref (type, name) - tree type, name; -{ - tree decl, fnfields, fields, t = error_mark_node; - tree basebinfo = NULL_TREE; - int dtor = 0; - - if (processing_template_decl) - return build_min_nt (SCOPE_REF, type, name); - - /* Handle namespace names fully here. */ - if (TREE_CODE (type) == IDENTIFIER_NODE - && get_aggr_from_typedef (type, 0) == 0) - { - tree ns = lookup_name (type, 0); - tree val; - if (ns && TREE_CODE (ns) == NAMESPACE_DECL) - { - val = lookup_namespace_name (ns, name); - if (val) - return val; - cp_error ("namespace `%D' has no member named `%D'", ns, name); - return error_mark_node; - } - } - - if (type == NULL_TREE || ! is_aggr_type (type, 1)) - return error_mark_node; - - if (TREE_CODE (name) == BIT_NOT_EXPR) - { - dtor = 1; - name = TREE_OPERAND (name, 0); - } - - if (name == constructor_name_full (type)) - name = constructor_name (type); - - if (TYPE_SIZE (complete_type (type)) == 0) - { - if (type == current_class_type) - t = IDENTIFIER_CLASS_VALUE (name); - else - t = NULL_TREE; - if (t == 0) - { - cp_error ("incomplete type `%T' does not have member `%D'", type, - name); - return error_mark_node; - } - if (TREE_CODE (t) == TYPE_DECL || TREE_CODE (t) == VAR_DECL - || TREE_CODE (t) == CONST_DECL) - { - mark_used (t); - return t; - } - if (TREE_CODE (t) == FIELD_DECL) - sorry ("use of member in incomplete aggregate type"); - else if (TREE_CODE (t) == FUNCTION_DECL) - sorry ("use of member function in incomplete aggregate type"); - else - my_friendly_abort (52); - return error_mark_node; - } - - if (current_class_type == 0 - || get_base_distance (type, current_class_type, 0, &basebinfo) == -1) - { - basebinfo = TYPE_BINFO (type); - decl = build1 (NOP_EXPR, type, error_mark_node); - } - else if (current_class_ptr == 0) - decl = build1 (NOP_EXPR, type, error_mark_node); - else - decl = current_class_ref; - - if (constructor_name (BINFO_TYPE (basebinfo)) == name) - if (dtor) - name = dtor_identifier; - else - name = ctor_identifier; - else - if (dtor) - my_friendly_abort (999); - - - fnfields = lookup_fnfields (basebinfo, name, 1); - fields = lookup_field (basebinfo, name, 0, 0); - - if (fields == error_mark_node || fnfields == error_mark_node) - return error_mark_node; - - /* A lot of this logic is now handled in lookup_field and - lookup_fnfield. */ - if (fnfields) - { - extern int flag_save_memoized_contexts; - basebinfo = TREE_PURPOSE (fnfields); - - /* Go from the TREE_BASELINK to the member function info. */ - t = TREE_VALUE (fnfields); - - if (DECL_CHAIN (t) == NULL_TREE) - { - tree access; - - /* unique functions are handled easily. */ - unique: - access = compute_access (basebinfo, t); - if (access == access_protected_node) - { - cp_error_at ("member function `%#D' is protected", t); - error ("in this context"); - return error_mark_node; - } - if (access == access_private_node) - { - cp_error_at ("member function `%#D' is private", t); - error ("in this context"); - return error_mark_node; - } - mark_used (t); - return build (OFFSET_REF, TREE_TYPE (t), decl, t); - } - - /* FNFIELDS is most likely allocated on the search_obstack, - which will go away after this class scope. If we need - to save this value for later (either for memoization - or for use as an initializer for a static variable), then - do so here. - - ??? The smart thing to do for the case of saving initializers - is to resolve them before we're done with this scope. */ - if (!TREE_PERMANENT (fnfields) - && ((flag_save_memoized_contexts && global_bindings_p ()) - || ! allocation_temporary_p ())) - fnfields = copy_list (fnfields); - - t = build_tree_list (error_mark_node, fnfields); - TREE_TYPE (t) = build_offset_type (type, unknown_type_node); - return t; - } - - /* Now that we know we are looking for a field, see if we - have access to that field. Lookup_field will give us the - error message. */ - - t = lookup_field (basebinfo, name, 1, 0); - - if (t == error_mark_node) - return error_mark_node; - - if (t == NULL_TREE) - { - cp_error ("`%D' is not a member of type `%T'", name, type); - return error_mark_node; - } - - if (TREE_CODE (t) == TYPE_DECL) - { - TREE_USED (t) = 1; - return t; - } - /* static class members and class-specific enum - values can be returned without further ado. */ - if (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == CONST_DECL) - { - mark_used (t); - return t; - } - - if (TREE_CODE (t) == FIELD_DECL && DECL_BIT_FIELD (t)) - { - cp_error ("illegal pointer to bit field `%D'", t); - return error_mark_node; - } - - /* static class functions too. */ - if (TREE_CODE (t) == FUNCTION_DECL - && TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE) - my_friendly_abort (53); - - /* In member functions, the form `type::name' is no longer - equivalent to `this->type::name', at least not until - resolve_offset_ref. */ - return build (OFFSET_REF, build_offset_type (type, TREE_TYPE (t)), decl, t); -} - -/* If a OFFSET_REF made it through to here, then it did - not have its address taken. */ - -tree -resolve_offset_ref (exp) - tree exp; -{ - tree type = TREE_TYPE (exp); - tree base = NULL_TREE; - tree member; - tree basetype, addr; - - if (TREE_CODE (exp) == TREE_LIST) - return build_unary_op (ADDR_EXPR, exp, 0); - - if (TREE_CODE (exp) == OFFSET_REF) - { - member = TREE_OPERAND (exp, 1); - base = TREE_OPERAND (exp, 0); - } - else - { - my_friendly_assert (TREE_CODE (type) == OFFSET_TYPE, 214); - if (TYPE_OFFSET_BASETYPE (type) != current_class_type) - { - error ("object missing in use of pointer-to-member construct"); - return error_mark_node; - } - member = exp; - type = TREE_TYPE (type); - base = current_class_ref; - } - - if ((TREE_CODE (member) == VAR_DECL - && ! TYPE_PTRMEMFUNC_P (TREE_TYPE (member))) - || TREE_CODE (TREE_TYPE (member)) == FUNCTION_TYPE - || TREE_CODE (TREE_TYPE (member)) == METHOD_TYPE) - { - /* These were static members. */ - if (mark_addressable (member) == 0) - return error_mark_node; - return member; - } - - if (TREE_CODE (TREE_TYPE (member)) == POINTER_TYPE - && TREE_CODE (TREE_TYPE (TREE_TYPE (member))) == METHOD_TYPE) - return member; - - /* Syntax error can cause a member which should - have been seen as static to be grok'd as non-static. */ - if (TREE_CODE (member) == FIELD_DECL && current_class_ref == NULL_TREE) - { - if (TREE_ADDRESSABLE (member) == 0) - { - cp_error_at ("member `%D' is non-static but referenced as a static member", - member); - error ("at this point in file"); - TREE_ADDRESSABLE (member) = 1; - } - return error_mark_node; - } - - /* The first case is really just a reference to a member of `this'. */ - if (TREE_CODE (member) == FIELD_DECL - && (base == current_class_ref - || (TREE_CODE (base) == NOP_EXPR - && TREE_OPERAND (base, 0) == error_mark_node))) - { - tree basetype_path, access; - - if (TREE_CODE (exp) == OFFSET_REF && TREE_CODE (type) == OFFSET_TYPE) - basetype = TYPE_OFFSET_BASETYPE (type); - else - basetype = DECL_CONTEXT (member); - - base = current_class_ptr; - - if (get_base_distance (basetype, TREE_TYPE (TREE_TYPE (base)), 0, &basetype_path) < 0) - { - error_not_base_type (basetype, TREE_TYPE (TREE_TYPE (base))); - return error_mark_node; - } - addr = convert_pointer_to (basetype, base); - access = compute_access (basetype_path, member); - if (access == access_public_node) - return build (COMPONENT_REF, TREE_TYPE (member), - build_indirect_ref (addr, NULL_PTR), member); - if (access == access_protected_node) - { - cp_error_at ("member `%D' is protected", member); - error ("in this context"); - return error_mark_node; - } - if (access == access_private_node) - { - cp_error_at ("member `%D' is private", member); - error ("in this context"); - return error_mark_node; - } - my_friendly_abort (55); - } - - /* Ensure that we have an object. */ - if (TREE_CODE (base) == NOP_EXPR - && TREE_OPERAND (base, 0) == error_mark_node) - addr = error_mark_node; - else - { - /* If this is a reference to a member function, then return the - address of the member function (which may involve going - through the object's vtable), otherwise, return an expression - for the dereferenced pointer-to-member construct. */ - addr = build_unary_op (ADDR_EXPR, base, 0); - } - - if (TREE_CODE (TREE_TYPE (member)) == OFFSET_TYPE) - { - if (addr == error_mark_node) - { - cp_error ("object missing in `%E'", exp); - return error_mark_node; - } - - basetype = TYPE_OFFSET_BASETYPE (TREE_TYPE (member)); - addr = convert_pointer_to (basetype, addr); - member = convert (ptrdiff_type_node, - build_unary_op (ADDR_EXPR, member, 0)); - - /* Pointer to data mebers are offset by one, so that a null - pointer with a real value of 0 is distinguishable from an - offset of the first member of a structure. */ - member = build_binary_op (MINUS_EXPR, member, - convert (ptrdiff_type_node, integer_one_node), - 0); - - return build1 (INDIRECT_REF, type, - build (PLUS_EXPR, build_pointer_type (type), - addr, member)); - } - else if (TYPE_PTRMEMFUNC_P (TREE_TYPE (member))) - { - return get_member_function_from_ptrfunc (&addr, member); - } - my_friendly_abort (56); - /* NOTREACHED */ - return NULL_TREE; -} - -/* Return either DECL or its known constant value (if it has one). */ - -tree -decl_constant_value (decl) - tree decl; -{ - if (! TREE_THIS_VOLATILE (decl) -#if 0 - /* These may be necessary for C, but they break C++. */ - ! TREE_PUBLIC (decl) - /* Don't change a variable array bound or initial value to a constant - in a place where a variable is invalid. */ - && ! pedantic -#endif /* 0 */ - && DECL_INITIAL (decl) != 0 - && TREE_CODE (DECL_INITIAL (decl)) != ERROR_MARK - /* This is invalid if initial value is not constant. - If it has either a function call, a memory reference, - or a variable, then re-evaluating it could give different results. */ - && TREE_CONSTANT (DECL_INITIAL (decl)) - /* Check for cases where this is sub-optimal, even though valid. */ - && TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR -#if 0 - /* We must allow this to work outside of functions so that - static constants can be used for array sizes. */ - && current_function_decl != 0 - && DECL_MODE (decl) != BLKmode -#endif - ) - return DECL_INITIAL (decl); - return decl; -} - -/* Friend handling routines. */ -/* Friend data structures: - - Lists of friend functions come from TYPE_DECL nodes. Since all - aggregate types are automatically typedef'd, these nodes are guaranteed - to exist. - - The TREE_PURPOSE of a friend list is the name of the friend, - and its TREE_VALUE is another list. - - For each element of that list, either the TREE_VALUE or the TREE_PURPOSE - will be filled in, but not both. The TREE_VALUE of that list is an - individual function which is a friend. The TREE_PURPOSE of that list - indicates a type in which all functions by that name are friends. - - Lists of friend classes come from _TYPE nodes. Love that consistency - thang. */ - -int -is_friend_type (type1, type2) - tree type1, type2; -{ - return is_friend (type1, type2); -} - -int -is_friend (type, supplicant) - tree type, supplicant; -{ - int declp; - register tree list; - - if (supplicant == NULL_TREE || type == NULL_TREE) - return 0; - - declp = (TREE_CODE_CLASS (TREE_CODE (supplicant)) == 'd'); - - if (declp) - /* It's a function decl. */ - { - tree list = DECL_FRIENDLIST (TYPE_MAIN_DECL (type)); - tree name = DECL_NAME (supplicant); - tree ctype; - - if (DECL_FUNCTION_MEMBER_P (supplicant)) - ctype = DECL_CLASS_CONTEXT (supplicant); - else - ctype = NULL_TREE; - - for (; list ; list = TREE_CHAIN (list)) - { - if (name == TREE_PURPOSE (list)) - { - tree friends = TREE_VALUE (list); - for (; friends ; friends = TREE_CHAIN (friends)) - { - if (ctype == TREE_PURPOSE (friends)) - return 1; - if (comptypes (TREE_TYPE (supplicant), - TREE_TYPE (TREE_VALUE (friends)), 1)) - return 1; - } - break; - } - } - } - else - /* It's a type. */ - { - if (type == supplicant) - return 1; - - list = CLASSTYPE_FRIEND_CLASSES (TREE_TYPE (TYPE_MAIN_DECL (type))); - for (; list ; list = TREE_CHAIN (list)) - if (supplicant == TREE_VALUE (list)) - return 1; - } - - { - tree context; - - if (! declp) - { - /* Are we a nested or local class? If so, we aren't friends - with the CONTEXT. */ - if (IS_AGGR_TYPE (supplicant)) - context = NULL_TREE; - else - context = DECL_CONTEXT (TYPE_MAIN_DECL (supplicant)); - } - else if (DECL_FUNCTION_MEMBER_P (supplicant)) - context = DECL_CLASS_CONTEXT (supplicant); - else - context = NULL_TREE; - - if (context) - return is_friend (type, context); - } - - return 0; -} - -/* Add a new friend to the friends of the aggregate type TYPE. - DECL is the FUNCTION_DECL of the friend being added. */ - -static void -add_friend (type, decl) - tree type, decl; -{ - tree typedecl = TYPE_MAIN_DECL (type); - tree list = DECL_FRIENDLIST (typedecl); - tree name = DECL_NAME (decl); - - while (list) - { - if (name == TREE_PURPOSE (list)) - { - tree friends = TREE_VALUE (list); - for (; friends ; friends = TREE_CHAIN (friends)) - { - if (decl == TREE_VALUE (friends)) - { - cp_warning ("`%D' is already a friend of class `%T'", - decl, type); - cp_warning_at ("previous friend declaration of `%D'", - TREE_VALUE (friends)); - return; - } - } - TREE_VALUE (list) = tree_cons (error_mark_node, decl, - TREE_VALUE (list)); - return; - } - list = TREE_CHAIN (list); - } - DECL_FRIENDLIST (typedecl) - = tree_cons (DECL_NAME (decl), build_tree_list (error_mark_node, decl), - DECL_FRIENDLIST (typedecl)); - if (DECL_NAME (decl) == ansi_opname[(int) MODIFY_EXPR]) - { - tree parmtypes = TYPE_ARG_TYPES (TREE_TYPE (decl)); - TYPE_HAS_ASSIGNMENT (TREE_TYPE (typedecl)) = 1; - if (parmtypes && TREE_CHAIN (parmtypes)) - { - tree parmtype = TREE_VALUE (TREE_CHAIN (parmtypes)); - if (TREE_CODE (parmtype) == REFERENCE_TYPE - && TREE_TYPE (parmtypes) == TREE_TYPE (typedecl)) - TYPE_HAS_ASSIGN_REF (TREE_TYPE (typedecl)) = 1; - } - } -} - -/* Declare that every member function NAME in FRIEND_TYPE - (which may be NULL_TREE) is a friend of type TYPE. */ - -static void -add_friends (type, name, friend_type) - tree type, name, friend_type; -{ - tree typedecl = TYPE_MAIN_DECL (type); - tree list = DECL_FRIENDLIST (typedecl); - - while (list) - { - if (name == TREE_PURPOSE (list)) - { - tree friends = TREE_VALUE (list); - while (friends && TREE_PURPOSE (friends) != friend_type) - friends = TREE_CHAIN (friends); - if (friends) - if (friend_type) - warning ("method `%s::%s' is already a friend of class", - TYPE_NAME_STRING (friend_type), - IDENTIFIER_POINTER (name)); - else - warning ("function `%s' is already a friend of class `%s'", - IDENTIFIER_POINTER (name), - IDENTIFIER_POINTER (DECL_NAME (typedecl))); - else - TREE_VALUE (list) = tree_cons (friend_type, NULL_TREE, - TREE_VALUE (list)); - return; - } - list = TREE_CHAIN (list); - } - DECL_FRIENDLIST (typedecl) = - tree_cons (name, - build_tree_list (friend_type, NULL_TREE), - DECL_FRIENDLIST (typedecl)); - if (! strncmp (IDENTIFIER_POINTER (name), - IDENTIFIER_POINTER (ansi_opname[(int) MODIFY_EXPR]), - strlen (IDENTIFIER_POINTER (ansi_opname[(int) MODIFY_EXPR])))) - { - TYPE_HAS_ASSIGNMENT (TREE_TYPE (typedecl)) = 1; - sorry ("declaring \"friend operator =\" will not find \"operator = (X&)\" if it exists"); - } -} - -/* Make FRIEND_TYPE a friend class to TYPE. If FRIEND_TYPE has already - been defined, we make all of its member functions friends of - TYPE. If not, we make it a pending friend, which can later be added - when its definition is seen. If a type is defined, then its TYPE_DECL's - DECL_UNDEFINED_FRIENDS contains a (possibly empty) list of friend - classes that are not defined. If a type has not yet been defined, - then the DECL_WAITING_FRIENDS contains a list of types - waiting to make it their friend. Note that these two can both - be in use at the same time! */ - -void -make_friend_class (type, friend_type) - tree type, friend_type; -{ - tree classes; - - if (IS_SIGNATURE (type)) - { - error ("`friend' declaration in signature definition"); - return; - } - if (IS_SIGNATURE (friend_type)) - { - error ("signature type `%s' declared `friend'", - IDENTIFIER_POINTER (TYPE_IDENTIFIER (friend_type))); - return; - } - if (type == friend_type) - { - pedwarn ("class `%s' is implicitly friends with itself", - TYPE_NAME_STRING (type)); - return; - } - - GNU_xref_hier (TYPE_NAME_STRING (type), - TYPE_NAME_STRING (friend_type), 0, 0, 1); - - classes = CLASSTYPE_FRIEND_CLASSES (type); - while (classes && TREE_VALUE (classes) != friend_type) - classes = TREE_CHAIN (classes); - if (classes) - warning ("class `%s' is already friends with class `%s'", - TYPE_NAME_STRING (TREE_VALUE (classes)), TYPE_NAME_STRING (type)); - else - { - CLASSTYPE_FRIEND_CLASSES (type) - = tree_cons (NULL_TREE, friend_type, CLASSTYPE_FRIEND_CLASSES (type)); - } -} - -/* Main friend processor. This is large, and for modularity purposes, - has been removed from grokdeclarator. It returns `void_type_node' - to indicate that something happened, though a FIELD_DECL is - not returned. - - CTYPE is the class this friend belongs to. - - DECLARATOR is the name of the friend. - - DECL is the FUNCTION_DECL that the friend is. - - In case we are parsing a friend which is part of an inline - definition, we will need to store PARM_DECL chain that comes - with it into the DECL_ARGUMENTS slot of the FUNCTION_DECL. - - FLAGS is just used for `grokclassfn'. - - QUALS say what special qualifies should apply to the object - pointed to by `this'. */ - -tree -do_friend (ctype, declarator, decl, parmdecls, flags, quals, funcdef_flag) - tree ctype, declarator, decl, parmdecls; - enum overload_flags flags; - tree quals; - int funcdef_flag; -{ - /* Every decl that gets here is a friend of something. */ - DECL_FRIEND_P (decl) = 1; - - if (ctype) - { - tree cname = TYPE_NAME (ctype); - if (TREE_CODE (cname) == TYPE_DECL) - cname = DECL_NAME (cname); - - /* A method friend. */ - if (TREE_CODE (decl) == FUNCTION_DECL) - { - if (flags == NO_SPECIAL && ctype && declarator == cname) - DECL_CONSTRUCTOR_P (decl) = 1; - - /* This will set up DECL_ARGUMENTS for us. */ - grokclassfn (ctype, cname, decl, flags, quals); - if (TYPE_SIZE (ctype) != 0) - decl = check_classfn (ctype, decl); - - if (TREE_TYPE (decl) != error_mark_node) - { - if (TYPE_SIZE (ctype)) - add_friend (current_class_type, decl); - else - { - cp_error ("member `%D' declared as friend before type `%T' defined", - decl, ctype); - } - } - } - else - { - /* Possibly a bunch of method friends. */ - - /* Get the class they belong to. */ - tree ctype = IDENTIFIER_TYPE_VALUE (cname); - tree fields = lookup_fnfields (TYPE_BINFO (ctype), declarator, 0); - - if (fields) - add_friends (current_class_type, declarator, ctype); - else - error ("method `%s' is not a member of class `%s'", - IDENTIFIER_POINTER (declarator), - IDENTIFIER_POINTER (cname)); - decl = void_type_node; - } - } - else if (TREE_CODE (decl) == FUNCTION_DECL - && ((IDENTIFIER_LENGTH (declarator) == 4 - && IDENTIFIER_POINTER (declarator)[0] == 'm' - && ! strcmp (IDENTIFIER_POINTER (declarator), "main")) - || (IDENTIFIER_LENGTH (declarator) > 10 - && IDENTIFIER_POINTER (declarator)[0] == '_' - && IDENTIFIER_POINTER (declarator)[1] == '_' - && strncmp (IDENTIFIER_POINTER (declarator)+2, - "builtin_", 8) == 0))) - { - /* raw "main", and builtin functions never gets overloaded, - but they can become friends. */ - add_friend (current_class_type, decl); - DECL_FRIEND_P (decl) = 1; - decl = void_type_node; - } - /* A global friend. - @@ or possibly a friend from a base class ?!? */ - else if (TREE_CODE (decl) == FUNCTION_DECL) - { - /* Friends must all go through the overload machinery, - even though they may not technically be overloaded. - - Note that because classes all wind up being top-level - in their scope, their friend wind up in top-level scope as well. */ - DECL_ASSEMBLER_NAME (decl) - = build_decl_overload (declarator, TYPE_ARG_TYPES (TREE_TYPE (decl)), - TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE); - DECL_ARGUMENTS (decl) = parmdecls; - if (funcdef_flag) - DECL_CLASS_CONTEXT (decl) = current_class_type; - - /* We can call pushdecl here, because the TREE_CHAIN of this - FUNCTION_DECL is not needed for other purposes. */ - decl = pushdecl (decl); - - make_decl_rtl (decl, NULL_PTR, 1); - add_friend (current_class_type, decl); - - DECL_FRIEND_P (decl) = 1; - } - else - { - /* @@ Should be able to ingest later definitions of this function - before use. */ - tree decl = lookup_name_nonclass (declarator); - if (decl == NULL_TREE) - { - warning ("implicitly declaring `%s' as struct", - IDENTIFIER_POINTER (declarator)); - decl = xref_tag (record_type_node, declarator, NULL_TREE, 1); - decl = TYPE_MAIN_DECL (decl); - } - - /* Allow abbreviated declarations of overloaded functions, - but not if those functions are really class names. */ - if (TREE_CODE (decl) == TREE_LIST && TREE_TYPE (TREE_PURPOSE (decl))) - { - warning ("`friend %s' archaic, use `friend class %s' instead", - IDENTIFIER_POINTER (declarator), - IDENTIFIER_POINTER (declarator)); - decl = TREE_TYPE (TREE_PURPOSE (decl)); - } - - if (TREE_CODE (decl) == TREE_LIST) - add_friends (current_class_type, TREE_PURPOSE (decl), NULL_TREE); - else - make_friend_class (current_class_type, TREE_TYPE (decl)); - decl = void_type_node; - } - return decl; -} - -/* Common subroutines of build_new and build_vec_delete. */ - -/* Common interface for calling "builtin" functions that are not - really builtin. */ - -tree -build_builtin_call (type, node, arglist) - tree type; - tree node; - tree arglist; -{ - tree rval = build (CALL_EXPR, type, node, arglist, NULL_TREE); - TREE_SIDE_EFFECTS (rval) = 1; - assemble_external (TREE_OPERAND (node, 0)); - TREE_USED (TREE_OPERAND (node, 0)) = 1; - return rval; -} - -/* Generate a C++ "new" expression. DECL is either a TREE_LIST - (which needs to go through some sort of groktypename) or it - is the name of the class we are newing. INIT is an initialization value. - It is either an EXPRLIST, an EXPR_NO_COMMAS, or something in braces. - If INIT is void_type_node, it means do *not* call a constructor - for this instance. - - For types with constructors, the data returned is initialized - by the appropriate constructor. - - Whether the type has a constructor or not, if it has a pointer - to a virtual function table, then that pointer is set up - here. - - Unless I am mistaken, a call to new () will return initialized - data regardless of whether the constructor itself is private or - not. NOPE; new fails if the constructor is private (jcm). - - Note that build_new does nothing to assure that any special - alignment requirements of the type are met. Rather, it leaves - it up to malloc to do the right thing. Otherwise, folding to - the right alignment cal cause problems if the user tries to later - free the memory returned by `new'. - - PLACEMENT is the `placement' list for user-defined operator new (). */ - -extern int flag_check_new; - -tree -build_new (placement, decl, init, use_global_new) - tree placement; - tree decl, init; - int use_global_new; -{ - tree type, true_type, size, rval; - tree nelts; - tree alloc_expr, alloc_temp; - int has_array = 0; - enum tree_code code = NEW_EXPR; - int use_cookie; - - tree pending_sizes = NULL_TREE; - - if (decl == error_mark_node) - return error_mark_node; - - if (TREE_CODE (decl) == TREE_LIST) - { - tree absdcl = TREE_VALUE (decl); - tree last_absdcl = NULL_TREE; - int old_immediate_size_expand; - - if (current_function_decl - && DECL_CONSTRUCTOR_P (current_function_decl)) - { - old_immediate_size_expand = immediate_size_expand; - immediate_size_expand = 0; - } - - nelts = integer_one_node; - - if (absdcl && TREE_CODE (absdcl) == CALL_EXPR) - my_friendly_abort (215); - while (absdcl && TREE_CODE (absdcl) == INDIRECT_REF) - { - last_absdcl = absdcl; - absdcl = TREE_OPERAND (absdcl, 0); - } - - if (absdcl && TREE_CODE (absdcl) == ARRAY_REF) - { - /* probably meant to be a vec new */ - tree this_nelts; - - while (TREE_OPERAND (absdcl, 0) - && TREE_CODE (TREE_OPERAND (absdcl, 0)) == ARRAY_REF) - { - last_absdcl = absdcl; - absdcl = TREE_OPERAND (absdcl, 0); - } - - has_array = 1; - this_nelts = TREE_OPERAND (absdcl, 1); - if (this_nelts != error_mark_node) - { - if (this_nelts == NULL_TREE) - error ("new of array type fails to specify size"); - else if (processing_template_decl) - { - nelts = this_nelts; - absdcl = TREE_OPERAND (absdcl, 0); - } - else - { - this_nelts = save_expr (convert (sizetype, this_nelts)); - absdcl = TREE_OPERAND (absdcl, 0); - if (this_nelts == integer_zero_node) - { - warning ("zero size array reserves no space"); - nelts = integer_zero_node; - } - else - nelts = build_binary_op (MULT_EXPR, nelts, this_nelts, 1); - } - } - else - nelts = integer_zero_node; - } - - if (last_absdcl) - TREE_OPERAND (last_absdcl, 0) = absdcl; - else - TREE_VALUE (decl) = absdcl; - - type = true_type = groktypename (decl); - if (! type || type == error_mark_node) - { - immediate_size_expand = old_immediate_size_expand; - return error_mark_node; - } - - if (current_function_decl - && DECL_CONSTRUCTOR_P (current_function_decl)) - { - pending_sizes = get_pending_sizes (); - immediate_size_expand = old_immediate_size_expand; - } - } - else if (TREE_CODE (decl) == IDENTIFIER_NODE) - { - if (IDENTIFIER_HAS_TYPE_VALUE (decl)) - { - /* An aggregate type. */ - type = IDENTIFIER_TYPE_VALUE (decl); - decl = TYPE_MAIN_DECL (type); - } - else - { - /* A builtin type. */ - decl = lookup_name (decl, 1); - my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 215); - type = TREE_TYPE (decl); - } - true_type = type; - } - else if (TREE_CODE (decl) == TYPE_DECL) - { - type = TREE_TYPE (decl); - true_type = type; - } - else - { - type = decl; - true_type = type; - decl = TYPE_MAIN_DECL (type); - } - - if (processing_template_decl) - { - tree t; - if (has_array) - t = min_tree_cons (min_tree_cons (NULL_TREE, type, NULL_TREE), - build_min_nt (ARRAY_REF, NULL_TREE, nelts), - NULL_TREE); - else - t = type; - - rval = build_min_nt (NEW_EXPR, placement, t, init); - NEW_EXPR_USE_GLOBAL (rval) = use_global_new; - return rval; - } - - /* ``A reference cannot be created by the new operator. A reference - is not an object (8.2.2, 8.4.3), so a pointer to it could not be - returned by new.'' ARM 5.3.3 */ - if (TREE_CODE (type) == REFERENCE_TYPE) - { - error ("new cannot be applied to a reference type"); - type = true_type = TREE_TYPE (type); - } - - if (TREE_CODE (type) == FUNCTION_TYPE) - { - error ("new cannot be applied to a function type"); - return error_mark_node; - } - - /* When the object being created is an array, the new-expression yields a - pointer to the initial element (if any) of the array. For example, - both new int and new int[10] return an int*. 5.3.4. */ - if (TREE_CODE (type) == ARRAY_TYPE && has_array == 0) - { - nelts = array_type_nelts_top (type); - has_array = 1; - type = true_type = TREE_TYPE (type); - } - - if (TYPE_READONLY (type) || TYPE_VOLATILE (type)) - type = TYPE_MAIN_VARIANT (type); - - /* If our base type is an array, then make sure we know how many elements - it has. */ - while (TREE_CODE (true_type) == ARRAY_TYPE) - { - tree this_nelts = array_type_nelts_top (true_type); - nelts = build_binary_op (MULT_EXPR, nelts, this_nelts, 1); - true_type = TREE_TYPE (true_type); - } - - if (TYPE_SIZE (complete_type (true_type)) == 0) - { - incomplete_type_error (0, true_type); - return error_mark_node; - } - - if (has_array) - size = fold (build_binary_op (MULT_EXPR, size_in_bytes (true_type), - nelts, 1)); - else - size = size_in_bytes (type); - - if (true_type == void_type_node) - { - error ("invalid type `void' for new"); - return error_mark_node; - } - - if (TYPE_LANG_SPECIFIC (true_type) - && CLASSTYPE_ABSTRACT_VIRTUALS (true_type)) - { - abstract_virtuals_error (NULL_TREE, true_type); - return error_mark_node; - } - - if (TYPE_LANG_SPECIFIC (true_type) && IS_SIGNATURE (true_type)) - { - signature_error (NULL_TREE, true_type); - return error_mark_node; - } - -#if 1 - /* Get a little extra space to store a couple of things before the new'ed - array, if this isn't the default placement new. */ - - use_cookie = (has_array && TYPE_VEC_NEW_USES_COOKIE (true_type) - && ! (placement && ! TREE_CHAIN (placement) - && TREE_TYPE (TREE_VALUE (placement)) == ptr_type_node)); -#else - /* Get a little extra space to store a couple of things before the new'ed - array, if this is either non-placement new or new (nothrow). */ - - use_cookie = (has_array && TYPE_VEC_NEW_USES_COOKIE (true_type) - && (! placement - || (IS_AGGR_TYPE (TREE_TYPE (placement)) - && (TYPE_IDENTIFIER (TREE_TYPE (placement)) - == get_identifier ("nothrow_t"))))); -#endif - - if (use_cookie) - { - tree extra = BI_header_size; - - size = size_binop (PLUS_EXPR, size, extra); - } - - if (has_array) - { - code = VEC_NEW_EXPR; - - if (init && pedantic) - cp_pedwarn ("initialization in array new"); - } - - /* Allocate the object. */ - if (! use_global_new && TYPE_LANG_SPECIFIC (true_type) - && (TYPE_GETS_NEW (true_type) & (1 << has_array))) - rval = build_opfncall (code, LOOKUP_NORMAL, - build_pointer_type (true_type), size, placement); - else if (placement) - { - rval = build_opfncall (code, LOOKUP_GLOBAL|LOOKUP_COMPLAIN, - ptr_type_node, size, placement); - rval = convert (build_pointer_type (true_type), rval); - } - else if (! has_array && flag_this_is_variable > 0 - && TYPE_NEEDS_CONSTRUCTING (true_type) && init != void_type_node) - { - if (init == NULL_TREE || TREE_CODE (init) == TREE_LIST) - rval = NULL_TREE; - else - { - error ("constructors take parameter lists"); - return error_mark_node; - } - } - else - { - rval = build_builtin_call (build_pointer_type (true_type), - has_array ? BIVN : BIN, - build_tree_list (NULL_TREE, size)); - TREE_CALLS_NEW (rval) = 1; - } - - if (flag_check_new && rval) - alloc_expr = rval = save_expr (rval); - else - alloc_expr = NULL_TREE; - - /* if rval is NULL_TREE I don't have to allocate it, but are we totally - sure we have some extra bytes in that case for the BI_header_size - cookies? And how does that interact with the code below? (mrs) */ - /* Finish up some magic for new'ed arrays */ - if (use_cookie && rval != NULL_TREE) - { - tree extra = BI_header_size; - tree cookie, exp1; - rval = convert (ptr_type_node, rval); /* convert to void * first */ - rval = convert (string_type_node, rval); /* lets not add void* and ints */ - rval = save_expr (build_binary_op (PLUS_EXPR, rval, extra, 1)); - /* Store header info. */ - cookie = build_indirect_ref (build (MINUS_EXPR, build_pointer_type (BI_header_type), - rval, extra), NULL_PTR); - exp1 = build (MODIFY_EXPR, void_type_node, - build_component_ref (cookie, nc_nelts_field_id, NULL_TREE, 0), - nelts); - TREE_SIDE_EFFECTS (exp1) = 1; - rval = convert (build_pointer_type (true_type), rval); - TREE_CALLS_NEW (rval) = 1; - TREE_SIDE_EFFECTS (rval) = 1; - rval = build_compound_expr (tree_cons (NULL_TREE, exp1, - build_tree_list (NULL_TREE, rval))); - } - - if (rval == error_mark_node) - return error_mark_node; - - /* Don't call any constructors or do any initialization. */ - if (init == void_type_node) - goto done; - - if (TYPE_NEEDS_CONSTRUCTING (type) || init) - { - if (! TYPE_NEEDS_CONSTRUCTING (type) - && ! IS_AGGR_TYPE (type) && ! has_array) - { - /* New 2.0 interpretation: `new int (10)' means - allocate an int, and initialize it with 10. */ - tree deref; - - rval = save_expr (rval); - deref = build_indirect_ref (rval, NULL_PTR); - TREE_READONLY (deref) = 0; - - if (TREE_CHAIN (init) != NULL_TREE) - pedwarn ("initializer list being treated as compound expression"); - else if (TREE_CODE (init) == CONSTRUCTOR) - { - pedwarn ("initializer list appears where operand should be used"); - init = TREE_OPERAND (init, 1); - } - init = build_compound_expr (init); - - init = convert_for_initialization (deref, type, init, LOOKUP_NORMAL, - "new", NULL_TREE, 0); - rval = build (COMPOUND_EXPR, TREE_TYPE (rval), - build_modify_expr (deref, NOP_EXPR, init), - rval); - TREE_NO_UNUSED_WARNING (rval) = 1; - TREE_SIDE_EFFECTS (rval) = 1; - TREE_CALLS_NEW (rval) = 1; - } - else if (! has_array) - { - tree newrval; - /* Constructors are never virtual. If it has an initialization, we - need to complain if we aren't allowed to use the ctor that took - that argument. */ - int flags = LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_COMPLAIN; - - if (rval && TYPE_USES_VIRTUAL_BASECLASSES (true_type)) - { - init = tree_cons (NULL_TREE, integer_one_node, init); - flags |= LOOKUP_HAS_IN_CHARGE; - } - - newrval = rval; - - if (newrval && TREE_CODE (TREE_TYPE (newrval)) == POINTER_TYPE) - newrval = build_indirect_ref (newrval, NULL_PTR); - - newrval = build_method_call (newrval, ctor_identifier, - init, TYPE_BINFO (true_type), flags); - - if (newrval) - { - rval = newrval; - TREE_HAS_CONSTRUCTOR (rval) = 1; - } - else - rval = error_mark_node; - } - else - rval = build (VEC_INIT_EXPR, TREE_TYPE (rval), - save_expr (rval), init, nelts); -#if 0 - else if (current_function_decl == NULL_TREE) - { - extern tree static_aggregates; - - /* In case of static initialization, SAVE_EXPR is good enough. */ - rval = save_expr (rval); - rval = copy_to_permanent (rval); - init = copy_to_permanent (init); - init = expand_vec_init (decl, rval, - build_binary_op (MINUS_EXPR, nelts, - integer_one_node, 1), - init, 0); - init = copy_to_permanent (init); - static_aggregates = perm_tree_cons (init, rval, static_aggregates); - } - else - { - /* Have to wrap this in RTL_EXPR for two cases: - in base or member initialization and if we - are a branch of a ?: operator. Since we - can't easily know the latter, just do it always. */ - tree xval = make_node (RTL_EXPR); - - /* If we want to check the value of the allocation expression, - and the number of elements in the array is not a constant, we - *must* expand the SAVE_EXPR for nelts in alloc_expr before we - expand it in the actual initialization. So we need to build up - an RTL_EXPR for alloc_expr. Sigh. */ - if (alloc_expr && ! TREE_CONSTANT (nelts)) - { - tree xval = make_node (RTL_EXPR); - rtx rtxval; - TREE_TYPE (xval) = TREE_TYPE (alloc_expr); - do_pending_stack_adjust (); - start_sequence_for_rtl_expr (xval); - emit_note (0, -1); - rtxval = expand_expr (alloc_expr, NULL_RTX, VOIDmode, 0); - do_pending_stack_adjust (); - TREE_SIDE_EFFECTS (xval) = 1; - RTL_EXPR_SEQUENCE (xval) = get_insns (); - end_sequence (); - RTL_EXPR_RTL (xval) = rtxval; - TREE_TYPE (xval) = TREE_TYPE (alloc_expr); - alloc_expr = xval; - } - - TREE_TYPE (xval) = TREE_TYPE (rval); - do_pending_stack_adjust (); - start_sequence_for_rtl_expr (xval); - - /* As a matter of principle, `start_sequence' should do this. */ - emit_note (0, -1); - - rval = save_expr (rval); - rval = expand_vec_init (decl, rval, - build_binary_op (MINUS_EXPR, nelts, - integer_one_node, 1), - init, 0); - - do_pending_stack_adjust (); - - TREE_SIDE_EFFECTS (xval) = 1; - TREE_CALLS_NEW (xval) = 1; - RTL_EXPR_SEQUENCE (xval) = get_insns (); - end_sequence (); - - if (TREE_CODE (rval) == SAVE_EXPR) - { - /* Errors may cause this to not get evaluated. */ - if (SAVE_EXPR_RTL (rval) == 0) - SAVE_EXPR_RTL (rval) = const0_rtx; - RTL_EXPR_RTL (xval) = SAVE_EXPR_RTL (rval); - } - else - { - my_friendly_assert (TREE_CODE (rval) == VAR_DECL, 217); - RTL_EXPR_RTL (xval) = DECL_RTL (rval); - } - rval = xval; - } -#endif - } - else if (TYPE_READONLY (true_type)) - cp_error ("uninitialized const in `new' of `%#T'", true_type); - - done: - - if (alloc_expr && rval != alloc_expr) - { - /* Did we modify the storage? */ - tree ifexp = build_binary_op (NE_EXPR, alloc_expr, - integer_zero_node, 1); - rval = build_conditional_expr (ifexp, rval, alloc_expr); - } - - if (rval && TREE_TYPE (rval) != build_pointer_type (type)) - { - /* The type of new int [3][3] is not int *, but int [3] * */ - rval = build_c_cast (build_pointer_type (type), rval); - } - - if (pending_sizes) - rval = build_compound_expr (chainon (pending_sizes, - build_tree_list (NULL_TREE, rval))); - - return rval; -} - -static tree -build_vec_delete_1 (base, maxindex, type, auto_delete_vec, auto_delete, - use_global_delete) - tree base, maxindex, type; - tree auto_delete_vec, auto_delete; - int use_global_delete; -{ - tree virtual_size; - tree ptype = build_pointer_type (type = complete_type (type)); - tree size_exp = size_in_bytes (type); - - /* Temporary variables used by the loop. */ - tree tbase, tbase_init; - - /* This is the body of the loop that implements the deletion of a - single element, and moves temp variables to next elements. */ - tree body; - - /* This is the LOOP_EXPR that governs the deletion of the elements. */ - tree loop; - - /* This is the thing that governs what to do after the loop has run. */ - tree deallocate_expr = 0; - - /* This is the BIND_EXPR which holds the outermost iterator of the - loop. It is convenient to set this variable up and test it before - executing any other code in the loop. - This is also the containing expression returned by this function. */ - tree controller = NULL_TREE; - - /* This is the BLOCK to record the symbol binding for debugging. */ - tree block; - - if (! IS_AGGR_TYPE (type) || ! TYPE_NEEDS_DESTRUCTOR (type)) - { - loop = integer_zero_node; - goto no_destructor; - } - - /* The below is short by BI_header_size */ - virtual_size = fold (size_binop (MULT_EXPR, size_exp, maxindex)); - - tbase = build_decl (VAR_DECL, NULL_TREE, ptype); - tbase_init = build_modify_expr (tbase, NOP_EXPR, - fold (build (PLUS_EXPR, ptype, - base, - virtual_size))); - DECL_REGISTER (tbase) = 1; - controller = build (BIND_EXPR, void_type_node, tbase, NULL_TREE, NULL_TREE); - TREE_SIDE_EFFECTS (controller) = 1; - block = build_block (tbase, NULL_TREE, NULL_TREE, NULL_TREE, NULL_TREE); - add_block_current_level (block); - - if (auto_delete != integer_zero_node - && auto_delete != integer_two_node) - { - tree base_tbd = convert (ptype, - build_binary_op (MINUS_EXPR, - convert (ptr_type_node, base), - BI_header_size, - 1)); - /* This is the real size */ - virtual_size = size_binop (PLUS_EXPR, virtual_size, BI_header_size); - body = build_tree_list (NULL_TREE, - build_x_delete (ptype, base_tbd, - 2 | use_global_delete, - virtual_size)); - body = build (COND_EXPR, void_type_node, - build (BIT_AND_EXPR, integer_type_node, - auto_delete, integer_one_node), - body, integer_zero_node); - } - else - body = NULL_TREE; - - body = tree_cons (NULL_TREE, - build_delete (ptype, tbase, auto_delete, - LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 1), - body); - - body = tree_cons (NULL_TREE, - build_modify_expr (tbase, NOP_EXPR, build (MINUS_EXPR, ptype, tbase, size_exp)), - body); - - body = tree_cons (NULL_TREE, - build (EXIT_EXPR, void_type_node, - build (EQ_EXPR, boolean_type_node, base, tbase)), - body); - - loop = build (LOOP_EXPR, void_type_node, build_compound_expr (body)); - - loop = tree_cons (NULL_TREE, tbase_init, - tree_cons (NULL_TREE, loop, NULL_TREE)); - loop = build_compound_expr (loop); - - no_destructor: - /* If the delete flag is one, or anything else with the low bit set, - delete the storage. */ - if (auto_delete_vec == integer_zero_node - || auto_delete_vec == integer_two_node) - deallocate_expr = integer_zero_node; - else - { - tree base_tbd; - - /* The below is short by BI_header_size */ - virtual_size = fold (size_binop (MULT_EXPR, size_exp, maxindex)); - - if (! TYPE_VEC_NEW_USES_COOKIE (type)) - /* no header */ - base_tbd = base; - else - { - base_tbd = convert (ptype, - build_binary_op (MINUS_EXPR, - convert (string_type_node, base), - BI_header_size, - 1)); - /* True size with header. */ - virtual_size = size_binop (PLUS_EXPR, virtual_size, BI_header_size); - } - deallocate_expr = build_x_delete (ptype, base_tbd, - 2 | use_global_delete, - virtual_size); - if (auto_delete_vec != integer_one_node) - deallocate_expr = build (COND_EXPR, void_type_node, - build (BIT_AND_EXPR, integer_type_node, - auto_delete_vec, integer_one_node), - deallocate_expr, integer_zero_node); - } - - if (loop && deallocate_expr != integer_zero_node) - { - body = tree_cons (NULL_TREE, loop, - tree_cons (NULL_TREE, deallocate_expr, NULL_TREE)); - body = build_compound_expr (body); - } - else - body = loop; - - /* Outermost wrapper: If pointer is null, punt. */ - body = build (COND_EXPR, void_type_node, - build (NE_EXPR, boolean_type_node, base, integer_zero_node), - body, integer_zero_node); - body = build1 (NOP_EXPR, void_type_node, body); - - if (controller) - { - TREE_OPERAND (controller, 1) = body; - return controller; - } - else - return convert (void_type_node, body); -} - -/* Build a tree to cleanup partially built arrays. - BASE is that starting address of the array. - COUNT is the count of objects that have been built, that need destroying. - TYPE is the type of elements in the array. */ - -static tree -build_array_eh_cleanup (base, count, type) - tree base, count, type; -{ - tree expr = build_vec_delete_1 (base, count, type, integer_two_node, - integer_zero_node, 0); - return expr; -} - -/* `expand_vec_init' performs initialization of a vector of aggregate - types. - - DECL is passed only for error reporting, and provides line number - and source file name information. - BASE is the space where the vector will be. - MAXINDEX is the maximum index of the array (one less than the - number of elements). - INIT is the (possibly NULL) initializer. - - FROM_ARRAY is 0 if we should init everything with INIT - (i.e., every element initialized from INIT). - FROM_ARRAY is 1 if we should index into INIT in parallel - with initialization of DECL. - FROM_ARRAY is 2 if we should index into INIT in parallel, - but use assignment instead of initialization. */ - -tree -expand_vec_init (decl, base, maxindex, init, from_array) - tree decl, base, maxindex, init; - int from_array; -{ - tree rval; - tree iterator, base2 = NULL_TREE; - tree type = TREE_TYPE (TREE_TYPE (base)); - tree size; - - maxindex = convert (ptrdiff_type_node, maxindex); - if (maxindex == error_mark_node) - return error_mark_node; - - if (current_function_decl == NULL_TREE) - { - rval = make_tree_vec (3); - TREE_VEC_ELT (rval, 0) = base; - TREE_VEC_ELT (rval, 1) = maxindex; - TREE_VEC_ELT (rval, 2) = init; - return rval; - } - - size = size_in_bytes (type); - - /* Set to zero in case size is <= 0. Optimizer will delete this if - it is not needed. */ - rval = get_temp_regvar (build_pointer_type (type), - convert (build_pointer_type (type), null_pointer_node)); - base = default_conversion (base); - base = convert (build_pointer_type (type), base); - expand_assignment (rval, base, 0, 0); - base = get_temp_regvar (build_pointer_type (type), base); - - if (init != NULL_TREE && TREE_CODE (init) == TREE_LIST) - init = build_compound_expr (init); - - if (init != NULL_TREE - && TREE_CODE (init) == CONSTRUCTOR - && (! decl || TREE_TYPE (init) == TREE_TYPE (decl))) - { - /* Initialization of array from {...}. */ - tree elts = CONSTRUCTOR_ELTS (init); - tree baseref = build1 (INDIRECT_REF, type, base); - tree baseinc = build (PLUS_EXPR, build_pointer_type (type), base, size); - int host_i = TREE_INT_CST_LOW (maxindex); - - if (IS_AGGR_TYPE (type)) - { - while (elts) - { - host_i -= 1; - expand_aggr_init (baseref, TREE_VALUE (elts), 0, 0); - - expand_assignment (base, baseinc, 0, 0); - elts = TREE_CHAIN (elts); - } - /* Initialize any elements by default if possible. */ - if (host_i >= 0) - { - if (TYPE_NEEDS_CONSTRUCTING (type) == 0) - { - if (obey_regdecls) - use_variable (DECL_RTL (base)); - goto done_init; - } - - iterator = get_temp_regvar (ptrdiff_type_node, - build_int_2 (host_i, 0)); - init = NULL_TREE; - goto init_by_default; - } - } - else - while (elts) - { - expand_assignment (baseref, TREE_VALUE (elts), 0, 0); - - expand_assignment (base, baseinc, 0, 0); - elts = TREE_CHAIN (elts); - } - - if (obey_regdecls) - use_variable (DECL_RTL (base)); - } - else - { - tree itype; - - iterator = get_temp_regvar (ptrdiff_type_node, maxindex); - - init_by_default: - - /* If initializing one array from another, - initialize element by element. */ - if (from_array) - { - /* We rely upon the below calls the do argument checking */ - if (decl == NULL_TREE) - { - sorry ("initialization of array from dissimilar array type"); - return error_mark_node; - } - if (init) - { - base2 = default_conversion (init); - itype = TREE_TYPE (base2); - base2 = get_temp_regvar (itype, base2); - itype = TREE_TYPE (itype); - } - else if (TYPE_LANG_SPECIFIC (type) - && TYPE_NEEDS_CONSTRUCTING (type) - && ! TYPE_HAS_DEFAULT_CONSTRUCTOR (type)) - { - error ("initializer ends prematurely"); - return error_mark_node; - } - } - - expand_start_cond (build (GE_EXPR, boolean_type_node, - iterator, integer_zero_node), 0); - if (TYPE_NEEDS_DESTRUCTOR (type)) - expand_eh_region_start (); - expand_start_loop_continue_elsewhere (1); - - if (from_array) - { - tree to = build1 (INDIRECT_REF, type, base); - tree from; - - if (base2) - from = build1 (INDIRECT_REF, itype, base2); - else - from = NULL_TREE; - - if (from_array == 2) - expand_expr_stmt (build_modify_expr (to, NOP_EXPR, from)); - else if (TYPE_NEEDS_CONSTRUCTING (type)) - expand_aggr_init (to, from, 0, 0); - else if (from) - expand_assignment (to, from, 0, 0); - else - my_friendly_abort (57); - } - else if (TREE_CODE (type) == ARRAY_TYPE) - { - if (init != 0) - sorry ("cannot initialize multi-dimensional array with initializer"); - expand_vec_init (decl, build1 (NOP_EXPR, build_pointer_type (TREE_TYPE (type)), base), - array_type_nelts (type), 0, 0); - } - else - { - tree targ = build1 (INDIRECT_REF, type, base); - tree rhs; - - if (init) - rhs = convert_for_initialization (targ, type, init, LOOKUP_NORMAL, - "initialization", NULL_TREE, 0); - else - rhs = NULL_TREE; - - expand_aggr_init (targ, rhs, 0, 0); - } - - expand_assignment (base, - build (PLUS_EXPR, build_pointer_type (type), base, size), - 0, 0); - if (base2) - expand_assignment (base2, - build (PLUS_EXPR, build_pointer_type (type), base2, size), 0, 0); - expand_loop_continue_here (); - expand_exit_loop_if_false (0, build (NE_EXPR, boolean_type_node, - build (PREDECREMENT_EXPR, ptrdiff_type_node, iterator, integer_one_node), minus_one)); - - if (obey_regdecls) - { - use_variable (DECL_RTL (base)); - if (base2) - use_variable (DECL_RTL (base2)); - } - expand_end_loop (); - if (TYPE_NEEDS_DESTRUCTOR (type) && flag_exceptions) - { - /* We have to ensure that this can live to the cleanup - expansion time, since we know it is only ever needed - once, generate code now. */ - push_obstacks_nochange (); - resume_temporary_allocation (); - { - tree e1, e2 = make_node (RTL_EXPR); - TREE_TYPE (e2) = void_type_node; - RTL_EXPR_RTL (e2) = const0_rtx; - TREE_SIDE_EFFECTS (e2) = 1; - start_sequence_for_rtl_expr (e2); - - e1 = build_array_eh_cleanup - (rval, - build_binary_op (MINUS_EXPR, maxindex, iterator, 1), - type); - expand_expr (e1, const0_rtx, VOIDmode, 0); - RTL_EXPR_SEQUENCE (e2) = get_insns (); - end_sequence (); - expand_eh_region_end (e2); - } - pop_obstacks (); - } - expand_end_cond (); - if (obey_regdecls) - use_variable (DECL_RTL (iterator)); - } - done_init: - - if (obey_regdecls) - use_variable (DECL_RTL (rval)); - return rval; -} - -/* Free up storage of type TYPE, at address ADDR. - - TYPE is a POINTER_TYPE and can be ptr_type_node for no special type - of pointer. - - VIRTUAL_SIZE is the amount of storage that was allocated, and is - used as the second argument to operator delete. It can include - things like padding and magic size cookies. It has virtual in it, - because if you have a base pointer and you delete through a virtual - destructor, it should be the size of the dynamic object, not the - static object, see Free Store 12.5 ANSI C++ WP. - - This does not call any destructors. */ - -tree -build_x_delete (type, addr, which_delete, virtual_size) - tree type, addr; - int which_delete; - tree virtual_size; -{ - int use_global_delete = which_delete & 1; - int use_vec_delete = !!(which_delete & 2); - tree rval; - enum tree_code code = use_vec_delete ? VEC_DELETE_EXPR : DELETE_EXPR; - - if (! use_global_delete && TYPE_LANG_SPECIFIC (TREE_TYPE (type)) - && (TYPE_GETS_DELETE (TREE_TYPE (type)) & (1 << use_vec_delete))) - rval = build_opfncall (code, LOOKUP_NORMAL, addr, virtual_size, NULL_TREE); - else - rval = build_builtin_call (void_type_node, use_vec_delete ? BIVD : BID, - build_tree_list (NULL_TREE, addr)); - return rval; -} - -/* Generate a call to a destructor. TYPE is the type to cast ADDR to. - ADDR is an expression which yields the store to be destroyed. - AUTO_DELETE is nonzero if a call to DELETE should be made or not. - If in the program, (AUTO_DELETE & 2) is non-zero, we tear down the - virtual baseclasses. - If in the program, (AUTO_DELETE & 1) is non-zero, then we deallocate. - - FLAGS is the logical disjunction of zero or more LOOKUP_ - flags. See cp-tree.h for more info. - - This function does not delete an object's virtual base classes. */ - -tree -build_delete (type, addr, auto_delete, flags, use_global_delete) - tree type, addr; - tree auto_delete; - int flags; - int use_global_delete; -{ - tree function; - tree member; - tree expr; - tree ref; - int ptr; - - if (addr == error_mark_node) - return error_mark_node; - - /* Can happen when CURRENT_EXCEPTION_OBJECT gets its type - set to `error_mark_node' before it gets properly cleaned up. */ - if (type == error_mark_node) - return error_mark_node; - - type = TYPE_MAIN_VARIANT (type); - - if (TREE_CODE (type) == POINTER_TYPE) - { - type = TYPE_MAIN_VARIANT (TREE_TYPE (type)); - if (TYPE_SIZE (complete_type (type)) == 0) - { - incomplete_type_error (0, type); - return error_mark_node; - } - if (TREE_CODE (type) == ARRAY_TYPE) - goto handle_array; - if (! IS_AGGR_TYPE (type)) - { - /* Call the builtin operator delete. */ - return build_builtin_call (void_type_node, BID, - build_tree_list (NULL_TREE, addr)); - } - if (TREE_SIDE_EFFECTS (addr)) - addr = save_expr (addr); - - /* throw away const and volatile on target type of addr */ - addr = convert_force (build_pointer_type (type), addr, 0); - ref = build_indirect_ref (addr, NULL_PTR); - ptr = 1; - } - else if (TREE_CODE (type) == ARRAY_TYPE) - { - handle_array: - if (TREE_SIDE_EFFECTS (addr)) - addr = save_expr (addr); - if (TYPE_DOMAIN (type) == NULL_TREE) - { - error ("unknown array size in delete"); - return error_mark_node; - } - return build_vec_delete (addr, array_type_nelts (type), - auto_delete, integer_two_node, - use_global_delete); - } - else - { - /* Don't check PROTECT here; leave that decision to the - destructor. If the destructor is accessible, call it, - else report error. */ - addr = build_unary_op (ADDR_EXPR, addr, 0); - if (TREE_SIDE_EFFECTS (addr)) - addr = save_expr (addr); - - if (TREE_CONSTANT (addr)) - addr = convert_pointer_to (type, addr); - else - addr = convert_force (build_pointer_type (type), addr, 0); - - if (TREE_CODE (addr) == NOP_EXPR - && TREE_OPERAND (addr, 0) == current_class_ptr) - ref = current_class_ref; - else - ref = build_indirect_ref (addr, NULL_PTR); - ptr = 0; - } - - my_friendly_assert (IS_AGGR_TYPE (type), 220); - - if (! TYPE_NEEDS_DESTRUCTOR (type)) - { - if (auto_delete == integer_zero_node) - return void_zero_node; - - /* Pass the size of the object down to the operator delete() in - addition to the ADDR. */ - if (TYPE_GETS_REG_DELETE (type) && !use_global_delete) - { - tree virtual_size = c_sizeof_nowarn (type); - return build_opfncall (DELETE_EXPR, LOOKUP_NORMAL, addr, - virtual_size, NULL_TREE); - } - - /* Call the builtin operator delete. */ - return build_builtin_call (void_type_node, BID, - build_tree_list (NULL_TREE, addr)); - } - - /* Below, we will reverse the order in which these calls are made. - If we have a destructor, then that destructor will take care - of the base classes; otherwise, we must do that here. */ - if (TYPE_HAS_DESTRUCTOR (type)) - { - tree parms = build_tree_list (NULL_TREE, addr); - tree dtor = DECL_MAIN_VARIANT (TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), 1)); - tree passed_auto_delete; - tree do_delete = NULL_TREE; - - if (use_global_delete) - { - tree cond = fold (build (BIT_AND_EXPR, integer_type_node, - auto_delete, integer_one_node)); - tree call = build_builtin_call - (void_type_node, BID, build_tree_list (NULL_TREE, addr)); - - cond = fold (build (COND_EXPR, void_type_node, cond, - call, void_zero_node)); - if (cond != void_zero_node) - do_delete = cond; - - passed_auto_delete = fold (build (BIT_AND_EXPR, integer_type_node, - auto_delete, integer_two_node)); - } - else - passed_auto_delete = auto_delete; - - if (flags & LOOKUP_PROTECT) - { - tree access; - tree basetypes = NULL_TREE; - if (current_class_type != NULL_TREE) - basetypes = get_binfo (type, current_class_type, 0); - if (basetypes == NULL_TREE) - basetypes = TYPE_BINFO (type); - access = compute_access (basetypes, dtor); - - if (access == access_private_node) - { - if (flags & LOOKUP_COMPLAIN) - cp_error ("destructor for type `%T' is private in this scope", type); - return error_mark_node; - } - else if (access == access_protected_node) - { - if (flags & LOOKUP_COMPLAIN) - cp_error ("destructor for type `%T' is protected in this scope", type); - return error_mark_node; - } - } - - /* Once we are in a destructor, try not going through - the virtual function table to find the next destructor. */ - if (DECL_VINDEX (dtor) - && ! (flags & LOOKUP_NONVIRTUAL) - && TREE_CODE (auto_delete) != PARM_DECL - && (ptr == 1 || ! resolves_to_fixed_type_p (ref, 0))) - { - tree binfo, basetype; - /* The code below is probably all broken. See call.c for the - complete right way to do this. this offsets may not be right - in the below. (mrs) */ - /* This destructor must be called via virtual function table. */ - dtor = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (DECL_CONTEXT (dtor)), 1); - basetype = DECL_CLASS_CONTEXT (dtor); - binfo = get_binfo (basetype, - TREE_TYPE (TREE_TYPE (TREE_VALUE (parms))), - 0); - expr = convert_pointer_to_real (binfo, TREE_VALUE (parms)); - if (expr != TREE_VALUE (parms)) - { - expr = fold (expr); - ref = build_indirect_ref (expr, NULL_PTR); - TREE_VALUE (parms) = expr; - } - function = build_vfn_ref (&TREE_VALUE (parms), ref, DECL_VINDEX (dtor)); - if (function == error_mark_node) - return error_mark_node; - TREE_TYPE (function) = build_pointer_type (TREE_TYPE (dtor)); - TREE_CHAIN (parms) = build_tree_list (NULL_TREE, passed_auto_delete); - expr = build_function_call (function, parms); - if (do_delete) - expr = build (COMPOUND_EXPR, void_type_node, expr, do_delete); - if (ptr && (flags & LOOKUP_DESTRUCTOR) == 0) - { - /* Handle the case where a virtual destructor is - being called on an item that is 0. - - @@ Does this really need to be done? */ - tree ifexp = build_binary_op(NE_EXPR, addr, integer_zero_node,1); - - expr = build (COND_EXPR, void_type_node, - ifexp, expr, void_zero_node); - } - } - else - { - tree ifexp; - - if ((flags & LOOKUP_DESTRUCTOR) - || TREE_CODE (ref) == VAR_DECL - || TREE_CODE (ref) == PARM_DECL - || TREE_CODE (ref) == COMPONENT_REF - || TREE_CODE (ref) == ARRAY_REF) - /* These can't be 0. */ - ifexp = integer_one_node; - else - /* Handle the case where a non-virtual destructor is - being called on an item that is 0. */ - ifexp = build_binary_op (NE_EXPR, addr, integer_zero_node, 1); - - /* Used to mean that this destructor was known to be empty, - but that's now obsolete. */ - my_friendly_assert (DECL_INITIAL (dtor) != void_type_node, 221); - - TREE_CHAIN (parms) = build_tree_list (NULL_TREE, passed_auto_delete); - expr = build_function_call (dtor, parms); - if (do_delete) - expr = build (COMPOUND_EXPR, void_type_node, expr, do_delete); - - if (ifexp != integer_one_node) - expr = build (COND_EXPR, void_type_node, - ifexp, expr, void_zero_node); - } - return expr; - } - else - { - /* This can get visibilities wrong. */ - tree binfos = BINFO_BASETYPES (TYPE_BINFO (type)); - int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; - tree base_binfo = n_baseclasses > 0 ? TREE_VEC_ELT (binfos, 0) : NULL_TREE; - tree exprstmt = NULL_TREE; - tree parent_auto_delete = auto_delete; - tree cond; - - /* If this type does not have a destructor, but does have - operator delete, call the parent parent destructor (if any), - but let this node do the deleting. Otherwise, it is ok - to let the parent destructor do the deleting. */ - if (TYPE_GETS_REG_DELETE (type) && !use_global_delete) - { - parent_auto_delete = integer_zero_node; - if (auto_delete == integer_zero_node) - cond = NULL_TREE; - else - { - tree virtual_size; - - /* This is probably wrong. It should be the size of the - virtual object being deleted. */ - virtual_size = c_sizeof_nowarn (type); - - expr = build_opfncall (DELETE_EXPR, LOOKUP_NORMAL, addr, - virtual_size, NULL_TREE); - if (expr == error_mark_node) - return error_mark_node; - if (auto_delete != integer_one_node) - cond = build (COND_EXPR, void_type_node, - build (BIT_AND_EXPR, integer_type_node, - auto_delete, integer_one_node), - expr, void_zero_node); - else - cond = expr; - } - } - else if (base_binfo == NULL_TREE - || (TREE_VIA_VIRTUAL (base_binfo) == 0 - && ! TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo)))) - { - cond = build (COND_EXPR, void_type_node, - build (BIT_AND_EXPR, integer_type_node, auto_delete, integer_one_node), - build_builtin_call (void_type_node, BID, - build_tree_list (NULL_TREE, addr)), - void_zero_node); - } - else - cond = NULL_TREE; - - if (cond) - exprstmt = build_tree_list (NULL_TREE, cond); - - if (base_binfo - && ! TREE_VIA_VIRTUAL (base_binfo) - && TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo))) - { - tree this_auto_delete; - - if (BINFO_OFFSET_ZEROP (base_binfo)) - this_auto_delete = parent_auto_delete; - else - this_auto_delete = integer_zero_node; - - expr = build_delete (build_pointer_type (BINFO_TYPE (base_binfo)), addr, - this_auto_delete, flags, 0); - exprstmt = tree_cons (NULL_TREE, expr, exprstmt); - } - - /* Take care of the remaining baseclasses. */ - for (i = 1; i < n_baseclasses; i++) - { - base_binfo = TREE_VEC_ELT (binfos, i); - if (! TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo)) - || TREE_VIA_VIRTUAL (base_binfo)) - continue; - - /* May be zero offset if other baseclasses are virtual. */ - expr = fold (build (PLUS_EXPR, build_pointer_type (BINFO_TYPE (base_binfo)), - addr, BINFO_OFFSET (base_binfo))); - - expr = build_delete (build_pointer_type (BINFO_TYPE (base_binfo)), expr, - integer_zero_node, - flags, 0); - - exprstmt = tree_cons (NULL_TREE, expr, exprstmt); - } - - for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member)) - { - if (TREE_CODE (member) != FIELD_DECL) - continue; - if (TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (member))) - { - tree this_member = build_component_ref (ref, DECL_NAME (member), NULL_TREE, 0); - tree this_type = TREE_TYPE (member); - expr = build_delete (this_type, this_member, integer_two_node, flags, 0); - exprstmt = tree_cons (NULL_TREE, expr, exprstmt); - } - } - - if (exprstmt) - return build_compound_expr (exprstmt); - /* Virtual base classes make this function do nothing. */ - return void_zero_node; - } -} - -/* For type TYPE, delete the virtual baseclass objects of DECL. */ - -tree -build_vbase_delete (type, decl) - tree type, decl; -{ - tree vbases = CLASSTYPE_VBASECLASSES (type); - tree result = NULL_TREE; - tree addr = build_unary_op (ADDR_EXPR, decl, 0); - - my_friendly_assert (addr != error_mark_node, 222); - - while (vbases) - { - tree this_addr = convert_force (build_pointer_type (BINFO_TYPE (vbases)), - addr, 0); - result = tree_cons (NULL_TREE, - build_delete (TREE_TYPE (this_addr), this_addr, - integer_zero_node, - LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 0), - result); - vbases = TREE_CHAIN (vbases); - } - return build_compound_expr (nreverse (result)); -} - -/* Build a C++ vector delete expression. - MAXINDEX is the number of elements to be deleted. - ELT_SIZE is the nominal size of each element in the vector. - BASE is the expression that should yield the store to be deleted. - This function expands (or synthesizes) these calls itself. - AUTO_DELETE_VEC says whether the container (vector) should be deallocated. - AUTO_DELETE say whether each item in the container should be deallocated. - - This also calls delete for virtual baseclasses of elements of the vector. - - Update: MAXINDEX is no longer needed. The size can be extracted from the - start of the vector for pointers, and from the type for arrays. We still - use MAXINDEX for arrays because it happens to already have one of the - values we'd have to extract. (We could use MAXINDEX with pointers to - confirm the size, and trap if the numbers differ; not clear that it'd - be worth bothering.) */ - -tree -build_vec_delete (base, maxindex, auto_delete_vec, auto_delete, - use_global_delete) - tree base, maxindex; - tree auto_delete_vec, auto_delete; - int use_global_delete; -{ - tree type; - - if (TREE_CODE (base) == OFFSET_REF) - base = resolve_offset_ref (base); - - type = TREE_TYPE (base); - - base = stabilize_reference (base); - - /* Since we can use base many times, save_expr it. */ - if (TREE_SIDE_EFFECTS (base)) - base = save_expr (base); - - if (TREE_CODE (type) == POINTER_TYPE) - { - /* Step back one from start of vector, and read dimension. */ - tree cookie_addr = build (MINUS_EXPR, build_pointer_type (BI_header_type), - base, BI_header_size); - tree cookie = build_indirect_ref (cookie_addr, NULL_PTR); - maxindex = build_component_ref (cookie, nc_nelts_field_id, NULL_TREE, 0); - do - type = TREE_TYPE (type); - while (TREE_CODE (type) == ARRAY_TYPE); - } - else if (TREE_CODE (type) == ARRAY_TYPE) - { - /* get the total number of things in the array, maxindex is a bad name */ - maxindex = array_type_nelts_total (type); - while (TREE_CODE (type) == ARRAY_TYPE) - type = TREE_TYPE (type); - base = build_unary_op (ADDR_EXPR, base, 1); - } - else - { - if (base != error_mark_node) - error ("type to vector delete is neither pointer or array type"); - return error_mark_node; - } - - return build_vec_delete_1 (base, maxindex, type, auto_delete_vec, auto_delete, - use_global_delete); -} |