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dce.c (find_call_stack_args, [...]): Fixed comments.

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2009-01-15  Kenneth Zadeck <zadeck@naturalbridge.com>

	* dce.c (find_call_stack_args, delete_unmarked_insns): Fixed
	comments.

From-SVN: r143398
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Kenneth Zadeck 2009-01-15 15:27:20 +00:00 committed by Kenneth Zadeck
parent 959d14e166
commit 750900dba0
2 changed files with 13 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2009-01-15 Kenneth Zadeck <zadeck@naturalbridge.com>
* dce.c (find_call_stack_args, delete_unmarked_insns): Fixed
comments.
2009-01-14 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/38245

12
gcc/dce.c
View File

@ -358,7 +358,7 @@ find_call_stack_args (rtx call_insn, bool do_mark, bool fast,
}
/* Walk backwards, looking for argument stores. The search stops
when seeting another call, sp adjustment or memory store other than
when seeing another call, sp adjustment or memory store other than
argument store. */
ret = false;
for (insn = PREV_INSN (call_insn); insn; insn = prev_insn)
@ -522,9 +522,13 @@ delete_unmarked_insns (void)
else if (marked_insn_p (insn))
continue;
/* Beware that reaching a dbg counter limit here can easily result
in miscompiled file, whenever some insn is eliminated, but
insn that depends on it is not. */
/* Beware that reaching a dbg counter limit here can rarely
result in miscompiled file. This occurs when a group of
insns must be deleted together. Currently this only
can happen on non-looping pure and constant calls
on machines where ACCUMULATE_OUTGOING_ARGS is true. By
using the dbg_cnt, it is possible to remove the call, but
leave the argument pushes to the stack. */
if (!dbg_cnt (dce))
continue;