[Bug tree-optimization/57343] [4.8/4.9 Regression] wrong code on x86_64-linux at -Os and above

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57343

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-05-21
                 CC|                            |jakub at gcc dot gnu.org
   Target Milestone|---                         |4.8.1
            Summary|wrong code on x86_64-linux  |[4.8/4.9 Regression] wrong
                   |at -Os and above            |code on x86_64-linux at -Os
                   |                            |and above
     Ever confirmed|0                           |1

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r193098 .

int c = 0;

int
main ()
{
  int i, f = 1;
  for (i = 0; i < 5; i++)
    {
      --c;
      unsigned char h = c * 100;
      if (h == 0)
        {
          f = 0;
          break;
        }
    }
  if (f != 1)
    __builtin_abort ();
  return 0;
}