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re PR tree-optimization/71477 (gcc ICE at -O3 on valid code on x86_64-linux-gnu with “seg fault”)

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2016-06-10  Richard Biener  <rguenther@suse.de>

	PR middle-end/71477
	* cfgloop.c (alloc_loop): Initialize nb_iterations_likely_upper_bound.

	* gcc.dg/torture/pr71477.c: New testcase.

From-SVN: r237287
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Richard Biener 2016-06-10 07:30:45 +00:00 • committed by Richard Biener
parent 5eeb039f6a
commit 200eafbfae
4 changed files with 22 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2016-06-10 Richard Biener <rguenther@suse.de>
PR middle-end/71477
* cfgloop.c (alloc_loop): Initialize nb_iterations_likely_upper_bound.
2016-06-09 Eric Botcazou <ebotcazou@adacore.com>
* df-problems.c (df_note_bb_compute): Guard use of DF_INSN_INFO_GET.

1
gcc/cfgloop.c
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@ -331,6 +331,7 @@ alloc_loop (void)
loop->exits->next = loop->exits->prev = loop->exits;
loop->can_be_parallel = false;
loop->nb_iterations_upper_bound = 0;
loop->nb_iterations_likely_upper_bound = 0;
loop->nb_iterations_estimate = 0;
return loop;
}

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-06-10 Richard Biener <rguenther@suse.de>
PR middle-end/71477
* gcc.dg/torture/pr71477.c: New testcase.
2016-06-09 Julia Koval <julia.koval@intel.com>
* gcc.target/i386/interrupt-12.c: Fix test for -fpic and corei7.

11
gcc/testsuite/gcc.dg/torture/pr71477.c Normal file
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@ -0,0 +1,11 @@
/* { dg-do compile } */
#define N 6
int a;
void fn1()
{
int k = 0;
for (; k < N;)
for (a = 0; a < N; k++)
a = k + N;
}