(store_bit_field): don't make flag_force_mem disable insv

for memory operands.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@12843 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/expmed.c b/gcc/expmed.c
index 2f6ff93..ee55ddb 100644 (file)
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -409,13 +409,13 @@ store_bit_field (str_rtx, bitsize, bitnum, fieldmode, value, align, total_size)
       int save_volatile_ok = volatile_ok;
       volatile_ok = 1;
 
-      /* If this machine's insv can only insert into a register, or if we
-        are to force MEMs into a register, copy OP0 into a register and
-        save it back later.  */
+      /* If this machine's insv can only insert into a register, copy OP0
+        into a register and save it back later.  */
+      /* This used to check flag_force_mem, but that was a serious
+        de-optimization now that flag_force_mem is enabled by -O2.  */
       if (GET_CODE (op0) == MEM
-         && (flag_force_mem
-             || ! ((*insn_operand_predicate[(int) CODE_FOR_insv][0])
-                   (op0, VOIDmode))))
+         && ! ((*insn_operand_predicate[(int) CODE_FOR_insv][0])
+               (op0, VOIDmode)))
        {
          rtx tempreg;
          enum machine_mode bestmode;