[Bug tree-optimization/59358] [4.8/4.9 Regression] Infinite loop generated with >=O2

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59358

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

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

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Full runtime testcase:
__attribute__((noinline, noclone)) int
foo (int *x, int y)
{
  int z = *x;
  if (y > z && y <= 16)
    while (y > z)
      z *= 2;
  return z;
}

int
main ()
{
  int i;
  for (i = 1; i < 17; i++)
    {
      int j = foo (&i, 16);
      int k;
      if (i >= 8 && i <= 15)
        k = 16 + (i - 8) * 2;
      else if (i >= 4 && i <= 7)
        k = 16 + (i - 4) * 4;
      else if (i == 3)
        k = 24;
      else
        k = 16;
      if (j != k)
        __builtin_abort ();
      j = foo (&i, 7);
      if (i >= 7)
        k = i;
      else if (i >= 4)
        k = 8 + (i - 4) * 2;
      else if (i == 3)
        k = 12;
      else
        k = 8;
      if (j != k)
        __builtin_abort ();
    }
  return 0;
}