[Bug tree-optimization/38819] [4.2/4.3/4.4 Regression] trapping expression wrongly hoisted out of loop

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2009-01-16 20:24 -------
int
main (void)
{
  int si1 = a;
  int si2 = b;
  int i;

  for (i = 0; i < 100; ++i) {
    if (a == 2)
      exit (0);
    r += si1 % si2;
  }
  abort ();
}

shows that PRE doesn't move code to where it executes more times than before
the transformation.  If it knows about this extra control-flow.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38819