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/* { dg-do compile } */
/* { dg-options "-O1 -fdump-tree-optimized" } */
/* { dg-require-effective-target int32plus } */
 
int bar (void);
 
void foo (void)
{
  unsigned i, j, n;
 
  for (i = 0; i < 100000; i++)
    ;
 
  n = bar ();
  for (i = 0; i < n; i++)
    ;
 
  for (i = 0; i < n; i++)
    for (j = 0; j < n; j++)
      ;
 
  /* These should not be removed.  */
  for (i = 0; i < 10000; i++)
    bar ();
 
  for (i = 0; i != n; i += 2)
    ;
}
 
/* { dg-final { scan-tree-dump-times "if " 3 "optimized" } } */
/* { dg-final { scan-tree-dump-times "bar " 2 "optimized" } } */
 
/* { dg-final { cleanup-tree-dump "optimized" } } */