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gcse.c (oprs_unchanged_p): Respect flag_gcse_lm. 

* gcse.c (oprs_unchanged_p): Respect flag_gcse_lm.
	(record_last_mem_set_info): Likewise.

From-SVN: r197012
This commit is contained in:
Steven Bosscher 2013-03-23 21:41:38 +00:00
parent 225ccc68d7
commit 85c0f02d87
2 changed files with 11 additions and 3 deletions
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3
gcc/ChangeLog
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@ -1,5 +1,8 @@
2013-03-23 Steven Bosscher <steven@gcc.gnu.org>
* gcse.c (oprs_unchanged_p): Respect flag_gcse_lm.
(record_last_mem_set_info): Likewise.
* df-core.c (rest_of_handle_df_initialize): Use XCNEWVEC instead
of XNEWVEC followed by memset.
(df_worklist_dataflow): Use XNEWVEC instead of xmalloc with a cast.

11
gcc/gcse.c
View File

@ -890,8 +890,9 @@ oprs_unchanged_p (const_rtx x, const_rtx insn, int avail_p)
}
case MEM:
if (load_killed_in_block_p (current_bb, DF_INSN_LUID (insn),
x, avail_p))
if (! flag_gcse_lm
|| load_killed_in_block_p (current_bb, DF_INSN_LUID (insn),
x, avail_p))
return 0;
else
return oprs_unchanged_p (XEXP (x, 0), insn, avail_p);
@ -1471,10 +1472,14 @@ canon_list_insert (rtx dest ATTRIBUTE_UNUSED, const_rtx x ATTRIBUTE_UNUSED,
static void
record_last_mem_set_info (rtx insn)
{
int bb = BLOCK_FOR_INSN (insn)->index;
int bb;
if (! flag_gcse_lm)
return;
/* load_killed_in_block_p will handle the case of calls clobbering
everything. */
bb = BLOCK_FOR_INSN (insn)->index;
modify_mem_list[bb].safe_push (insn);
bitmap_set_bit (modify_mem_list_set, bb);