[Bug tree-optimization/21485] [4.2/4.3/4.4 Regression] missed load PRE, PRE makes i?86 suck

[rguenth at gcc dot gnu dot org]

------- Comment #36 from rguenth at gcc dot gnu dot org  2008-10-04 16:16 -------
Testcase for that:

/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-pre" } */

long
NumSift (long *array, int b, unsigned long k)
{
  if (b)
    if (array[k] < array[k + 1L])
      ++k;
  return array[k];
}

/* There should be two loads left.  */

/* { dg-final { scan-tree-dump-times "= \\\*" 2 "pre" } } */
/* { dg-final { cleanup-tree-dump "pre" } } */


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21485