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re PR rtl-optimization/46440 (ICE: in rtl_verify_flow_info, at cfgrtl.c:2165 with -fstack-protector-all -fno-tree-dominator-opts -fno-tree-fre)

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PR rtl-optimization/46440
	* combine.c (update_cfg_for_uncondjump): When changing
	an indirect jump into unconditional jump, remove BARRIERs
	from bb's footer.

	* gcc.dg/pr46440.c: New test.

From-SVN: r166867
This commit is contained in:
Jakub Jelinek 2010-11-17 14:02:31 +01:00 committed by Jakub Jelinek
parent f79616a446
commit 073d7052e5
4 changed files with 54 additions and 1 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2010-11-17 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/46440
* combine.c (update_cfg_for_uncondjump): When changing
an indirect jump into unconditional jump, remove BARRIERs
from bb's footer.
2010-11-17 Joseph Myers <joseph@codesourcery.com>
* opts.c (target_handle_option): Do not assert that loc ==

20
gcc/combine.c
View File

@ -2460,7 +2460,25 @@ update_cfg_for_uncondjump (rtx insn)
delete_insn (insn);
if (at_end && EDGE_COUNT (bb->succs) == 1)
single_succ_edge (bb)->flags |= EDGE_FALLTHRU;
{
rtx insn;
single_succ_edge (bb)->flags |= EDGE_FALLTHRU;
/* Remove barriers from the footer if there are any. */
for (insn = bb->il.rtl->footer; insn; insn = NEXT_INSN (insn))
if (BARRIER_P (insn))
{
if (PREV_INSN (insn))
NEXT_INSN (PREV_INSN (insn)) = NEXT_INSN (insn);
else
bb->il.rtl->footer = NEXT_INSN (insn);
if (NEXT_INSN (insn))
PREV_INSN (NEXT_INSN (insn)) = PREV_INSN (insn);
}
else if (LABEL_P (insn))
break;
}
}
/* Try to combine the insns I0, I1 and I2 into I3.

3
gcc/testsuite/ChangeLog
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@ -1,5 +1,8 @@
2010-11-17 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/46440
* gcc.dg/pr46440.c: New test.
PR testsuite/45429
* gcc.dg/vect/no-section-anchors-vect-64.c: New test.

25
gcc/testsuite/gcc.dg/pr46440.c Normal file
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@ -0,0 +1,25 @@
/* PR rtl-optimization/46440 */
/* { dg-do compile } */
/* { dg-options "-O -fstack-protector -fno-tree-dominator-opts -fno-tree-fre" } */
/* { dg-require-effective-target fstack_protector } */
int i;
void bar (char *);
void
foo (void)
{
void *l;
char c[64];
bar (c);
i = 1;
if (i)
l = &&l1;
else
l = &&l2;
goto *l;
l2:
__builtin_abort ();
l1:;
}