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flow.c (mark_set_1): Do not record BLKmode stores as dead store elimination candidates.

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        * flow.c (mark_set_1): Do not record BLKmode stores as dead
        store elimination candidates.

From-SVN: r27140
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Jeffrey A Law 1999-05-25 13:14:40 +00:00 committed by Jeff Law
parent c2c08b29b9
commit 3ce7c5a21d
2 changed files with 8 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
Tue May 25 14:06:06 1999 Jeffrey A Law (law@cygnus.com)
* flow.c (mark_set_1): Do not record BLKmode stores as dead
store elimination candidates.
Tue May 25 08:55:57 1999 Gavin Romig-Koch <gavin@cygnus.com>
* config/mips/mips.h (ASM_OUTPUT_DOUBLE_INT) : Use 'dword' if

3
gcc/flow.c
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@ -3258,6 +3258,9 @@ mark_set_1 (needed, dead, x, insn, significant)
invalidate_mems_from_autoinc (insn);
if (GET_CODE (reg) == MEM && ! side_effects_p (reg)
/* We do not know the size of a BLKmode store, so we do not track
them for redundant store elimination. */
&& GET_MODE (reg) != BLKmode
/* There are no REG_INC notes for SP, so we can't assume we'll see
everything that invalidates it. To be safe, don't eliminate any
stores though SP; none of them should be redundant anyway. */