[Bug tree-optimization/33434] [4.3 Regression] -fipa-cp miscompilation

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2007-10-20 00:05 -------
(In reply to comment #3)
> A regression hunt on powerpc-linux identified this patch:
HEHEHEHEHEHEHE.  Seriously this is funny.

Anyways try changing the code to be (which will not invoke my removal of the
"optimization"):
/* { dg-do run } */
/* { dg-options "-O3 -fipa-cp" } */

int k;

void f1 (int a, int b)
{
  if (a)
   {
     int c = b--;
    while (c)
      k = 1;
   }
  else
    if (b != 1)
      __builtin_abort ();
}

int main (void)
{
  f1 (1, 1);
  if (k != 1)
    __builtin_abort ();
  return 0;
}


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |janis at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-10-20 00:05:28
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33434