gcc/testsuite/gcc.dg/tree-ssa/vrp51.c

   1 /* PR tree-optimization/28632 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -ftree-vrp -fno-tree-ccp" } */
   4 /* { dg-require-effective-target int32plus } */
   5
   6 void
   7 v4 (unsigned a, unsigned b)
   8 {
   9   if (a < 0x1000) return;
  10   if (a > 0x1000) return;
  11   if (b < 0x0110) return;
  12   /* constant true.  */
  13   if (!__builtin_constant_p ((a|b) >= 0x01000))
  14     __asm__("vrp.bug.always.true");
  15   /* VRP must not think that this is constant.  */
  16   if (__builtin_constant_p ((a|b) >= 0x10000))
  17     __asm__("vrp.bug.not.always.true");
  18 }
  19
  20 void
  21 u4 (unsigned n)
  22 {
  23   if (n > 0x10111) return;
  24   if (n < 0x10101) return;
  25   /* always true.  */
  26   if (!__builtin_constant_p (n & 0x00100))
  27     __asm__("vrp.bug.always.true");
  28   /* VRP must not think that this is constant true.  */
  29   if (__builtin_constant_p (n & 0x00001))
  30     __asm__("vrp.bug.not.always.true");
  31   /* Out of range, always evaluates to constant false.  */
  32   if (!__builtin_constant_p (n & 0x01000))
  33     __asm__("vrp.bug.always.false");
  34 }
  35
  36 void
  37 u5 (unsigned n)
  38 {
  39   struct s {unsigned exp:8;} x;
  40   x.exp = n;
  41   if (__builtin_constant_p(((n + 1) & 255) > 1))
  42     __asm__("vrp.bug.not.always.true");
  43 }
  44
  45 void
  46 v5 (int a, int b)
  47 {
  48   if (a < 0x1000) return;
  49   if (a > 0x1000) return;
  50   if (b < 0x0110) return;
  51   /* constant true.  */
  52   if (!__builtin_constant_p ((a|b) >= 0x01000))
  53     __asm__("vrp.bug.always.true");
  54   /* VRP must not think that this is always true.  */
  55   if (__builtin_constant_p ((a|b) >= 0x10000))
  56     __asm__("vrp.bug.not.always.true");
  57 }
  58
  59 /* { dg-final { scan-assembler-not "vrp\\\.bug\\\." } } */