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re PR rtl-optimization/79386 (ICE: segmentation fault in cprop w/ -O2 on 32-bit BE powerpc) 

PR rtl-optimization/79386
	* cprop.c (bypass_conditional_jumps): Initialize
	bypass_last_basic_block already before splitting bbs after
	unconditional traps...
	(bypass_conditional_jumps): ... rather than here.

	* gcc.c-torture/compile/pr79386.c: New test.

From-SVN: r245251
This commit is contained in:
Jakub Jelinek 2017-02-07 18:45:57 +01:00 committed by Jakub Jelinek
parent 8e956c2273
commit ec48209a6c
4 changed files with 62 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,5 +1,11 @@
2017-02-07 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/79386
* cprop.c (bypass_conditional_jumps): Initialize
bypass_last_basic_block already before splitting bbs after
unconditional traps...
(bypass_conditional_jumps): ... rather than here.
PR target/79299
* config/i386/sse.md (xtg_mode, gatherq_mode): New mode attrs.
(*avx512f_gathersi<mode>, *avx512f_gathersi<mode>_2,

6
gcc/cprop.c
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@ -1697,7 +1697,6 @@ bypass_conditional_jumps (void)
if (ENTRY_BLOCK_PTR_FOR_FN (cfun)->next_bb == EXIT_BLOCK_PTR_FOR_FN (cfun))
return 0;
bypass_last_basic_block = last_basic_block_for_fn (cfun);
mark_dfs_back_edges ();
changed = 0;
@ -1863,6 +1862,11 @@ one_cprop_pass (void)
}
}
/* Make sure bypass_conditional_jumps will ignore not just its new
basic blocks, but also the ones after unconditional traps (those are
unreachable and will be eventually removed as such). */
bypass_last_basic_block = last_basic_block_for_fn (cfun);
while (!uncond_traps.is_empty ())
{
rtx_insn *insn = uncond_traps.pop ();

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2017-02-07 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/79386
* gcc.c-torture/compile/pr79386.c: New test.
2017-02-07 Dominik Vogt <vogt@linux.vnet.ibm.com>
Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>

46
gcc/testsuite/gcc.c-torture/compile/pr79386.c Normal file
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@ -0,0 +1,46 @@
/* PR rtl-optimization/79386 */
int a, b;
int
foo (int x)
{
int c;
int *d, *e;
if (b == 0)
{
c = 0;
e = &b;
d = &b;
}
else
{
int f;
c = 1;
for (f = 0; f < 9; ++f)
c *= 3;
e = (int *) (__UINTPTR_TYPE__) c;
d = &x;
}
*e = c < 3;
if (*e != 0)
{
int g;
b += (a != 0) ? a : 1;
if (g != 0 || x != 0)
*d = 0;
if (b >= 0)
{
if (g != 0)
g = x;
if (*d / g != 0)
for (;;)
;
}
}
return b * (a != 0 && *d != 0);
}