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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [testsuite/] [gcc.dg/] [tree-ssa/] [pr22026.c] - Rev 867

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/* PR tree-optimization/22026
   VRP used think that ~[0,0] + ~[0,0] = ~[0,0], which is wrong.  The
   same applies to subtraction and unsigned multiplication.  */
 
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-vrp1" } */
 
int
plus (int x, int y)
{
  if (x != 0)
    if (y != 0)
      {
        int z = x + y;
        if (z != 0)
          return 1;
      }
  return 0;
}
 
int
minus (int x, int y)
{
  if (x != 0)
    if (y != 0)
      {
        int z = x - y;
        if (z != 0)
          return 1;
      }
  return 0;
}
 
int
mult (unsigned x, unsigned y)
{
  if (x != 0)
    if (y != 0)
      {
	unsigned z = x * y;
	if (z != 0)
	  return 1;
      }
  return 0;
}
 
/* None of the predicates can be folded in these functions.  */
/* { dg-final { scan-tree-dump-times "Folding predicate" 0 "vrp1" } } */
/* { dg-final { cleanup-tree-dump "vrp1" } } */
 

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