* config/mmix/mmix.h (REGISTER_MOVE_COST): Remove macro.

	* config/mmix/mmix-protos.h (mmix_register_move_cost): Remove.
	* config/mmix/mmix.c (mmix_register_move_cost): Make static.
	Change 'from' and 'to' arguments type to reg_class_t.
	(TARGET_REGISTER_MOVE_COST): Define.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@177600 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 12 insertions, 23 deletions

diff --git a/gcc/config/mmix/mmix-protos.h b/gcc/config/mmix/mmix-protos.h
index a6faf6e1494..4e8c338b80c 100644
--- a/gcc/config/mmix/mmix-protos.h
+++ b/gcc/config/mmix/mmix-protos.h
@@ -26,8 +26,6 @@ extern int mmix_starting_frame_offset (void);
 extern int mmix_function_arg_regno_p (int, int);
 extern void mmix_function_profiler (FILE *, int);
 extern int mmix_reversible_cc_mode (enum machine_mode);
-extern int mmix_register_move_cost
-  (enum machine_mode, enum reg_class, enum reg_class);
 extern const char *mmix_text_section_asm_op (void);
 extern const char *mmix_data_section_asm_op (void);
 extern void mmix_output_quoted_string (FILE *, const char *, int);
diff --git a/gcc/config/mmix/mmix.c b/gcc/config/mmix/mmix.c
index e6cebce010e..f249a66081c 100644
--- a/gcc/config/mmix/mmix.c
+++ b/gcc/config/mmix/mmix.c
@@ -141,6 +141,8 @@ static void mmix_setup_incoming_varargs
 static void mmix_file_start (void);
 static void mmix_file_end (void);
 static bool mmix_rtx_costs (rtx, int, int, int *, bool);
+static int mmix_register_move_cost (enum machine_mode,
+				    reg_class_t, reg_class_t);
 static rtx mmix_struct_value_rtx (tree, int);
 static enum machine_mode mmix_promote_function_mode (const_tree,
 						     enum machine_mode,
@@ -224,6 +226,9 @@ static void mmix_conditional_register_usage (void);
 #undef TARGET_ADDRESS_COST
 #define TARGET_ADDRESS_COST hook_int_rtx_bool_0
 
+#undef TARGET_REGISTER_MOVE_COST
+#define TARGET_REGISTER_MOVE_COST mmix_register_move_cost
+
 #undef TARGET_MACHINE_DEPENDENT_REORG
 #define TARGET_MACHINE_DEPENDENT_REORG mmix_reorg
 
@@ -1233,12 +1238,15 @@ mmix_rtx_costs (rtx x ATTRIBUTE_UNUSED,
   return false;
 }
 
-/* REGISTER_MOVE_COST.  */
+/* TARGET_REGISTER_MOVE_COST.
 
-int
+   The special registers can only move to and from general regs, and we
+   need to check that their constraints match, so say 3 for them.  */
+
+static int
 mmix_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED,
-			 enum reg_class from,
-			 enum reg_class to)
+			 reg_class_t from,
+			 reg_class_t to)
 {
   return (from == GENERAL_REGS && from == to) ? 2 : 3;
 }
diff --git a/gcc/config/mmix/mmix.h b/gcc/config/mmix/mmix.h
index 31d21b9f31d..787f64f4bf5 100644
--- a/gcc/config/mmix/mmix.h
+++ b/gcc/config/mmix/mmix.h
@@ -617,23 +617,6 @@ typedef struct { int regs; int lib; } CUMULATIVE_ARGS;
 
 /* Node: Costs */
 
-/* The special registers can only move to and from general regs, and we
-   need to check that their constraints match, so say 3 for them.  */
-/* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2)
-   miscompiles reload1.c:reload_cse_simplify_set; a call to
-   reload_cse_regno_equal_p is missing when checking if a substitution of
-   a register setting is valid if this is defined to just the expression
-   in mmix_register_move_cost.
-
-   Symptom: a (all?) register setting is optimized away for e.g.
-   "char *p1(char *p) { return p+1; }" and the value of register zero ($0)
-   is returned.
-
-   We can workaround by making this a function call - unknown if this
-   causes dire speed effects.  */
-#define REGISTER_MOVE_COST(MODE, FROM, TO) \
- mmix_register_move_cost (MODE, FROM, TO)
-
 #define SLOW_BYTE_ACCESS 0