gcc/testsuite/gcc.dg/tree-ssa/vrp93.c

   1 /* PR target/29776 */
   2 /* PR tree-optimization/61725 */
   3 /* { dg-do compile } */
   4 /* { dg-options "-O2 -fdump-tree-vrp1" } */
   5 /* { dg-final { scan-tree-dump-not "link_error" "vrp1"} } */
   6
   7 #define A(fn, arg, min, max) \
   8   if (__builtin_##fn (arg) < min || __builtin_##fn (arg) > max) \
   9     link_error ();
  10 #define B(fn, min, max) \
  11   A (fn, a, min, max) A (fn##l, b, min, max) A (fn##ll, c, min, max)
  12 #define C(fn, min, sub) \
  13   A (fn, a, min, ((int) sizeof (a) * __CHAR_BIT__ - sub)) \
  14   A (fn##l, b, min, ((int) sizeof (b) * __CHAR_BIT__ - sub)) \
  15   A (fn##ll, c, min, ((int) sizeof (c) * __CHAR_BIT__ - sub))
  16
  17 extern void link_error (void);
  18
  19 unsigned int d;
  20 unsigned long e;
  21 unsigned long long f;
  22
  23 void
  24 foo (int a, long b, long long c)
  25 {
  26   C (ffs, 0, 0)
  27   a &= 63; b &= 63; c &= 63;
  28   B (ffs, 0, 6)
  29   a++; b++; c++;
  30   B (ffs, 1, 7)
  31   a -= 2; b -= 2; c -= 2;
  32   C (ffs, 0, 0)
  33   a -= 63; b -= 63; c -= 63;
  34   C (ffs, 1, 0)
  35 }