gcc/testsuite/gcc.dg/tree-ssa/pr61839_4.c

   1 /* PR tree-optimization/61839.  */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2 -fdump-tree-vrp1 -fdump-tree-optimized" } */
   4 /* { dg-require-effective-target int32plus } */
   5
   6 __attribute__ ((noinline))
   7 int foo (int a, unsigned b)
   8 {
   9   unsigned c = 1;
  10   if (b >= 1 && b <= ((unsigned)(-1) - 1))
  11     return 0;
  12   c = b >> 4;
  13   if (c == 268435455)
  14     ;
  15   else
  16     __builtin_abort ();
  17   return 0;
  18 }
  19
  20 int main ()
  21 {
  22   volatile unsigned b = (unsigned)(-1);
  23   foo (-1, b);
  24 }
  25
  26 /* Scan for ~[1, 4294967294] >> 4 in function foo.  */
  27 /* { dg-final { scan-tree-dump-times "0 : 268435455" 1  "vrp1" } } */
  28 /* { dg-final { scan-tree-dump-times "268435455" 0  "optimized" } } */