[Bug tree-optimization/59523] [4.9 Regression] r205856 caused internal compiler error: verify_ssa failed

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59523

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase:
/* PR tree-optimization/59523 */
/* { dg-do compile } */
/* { dg-options "-Ofast" } */
/* { dg-additional-options "-mavx2" { target { i?86-*-* x86_64-*-* } } } */

int *
foo (int a, int *b, int *c)
{
  int i, *r = __builtin_alloca (a * sizeof (int));
  __builtin_memset (r, 0, a * sizeof (int));
  for (i = 0; i < 64; i++)
    c[i] += b[i];
  for (i = 0; i < a; i++)
    if (r[i] == 0)
      r[i] = 1;
  return r;
}