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

extern void abort (void);

int
foo1 (int x, int y)
{
  int z;

  if (x >= y)
    return 1;

  z = y - x;
  if (z <= 0)
    abort ();

  return z;
}

unsigned int
foo2 (unsigned int x, unsigned int y)
{
  unsigned int z;

  if (x >= y)
    return 1;

  z = y - x;
  if (z == 0)
    abort ();

  return z;
}

/* { dg-final { scan-tree-dump-not "abort" "optimized" } } */