gcc/testsuite/gcc.dg/pr83424.c

   1 /* PR rtl-optimization/83424 */
   2 /* { dg-do run { target int128 } } */
   3 /* { dg-options "-O -fno-tree-ccp -fno-tree-coalesce-vars" } */
   4
   5 typedef unsigned char u8;
   6 typedef unsigned int u32;
   7 typedef unsigned __int128 u128;
   8
   9 u32 a, c;
  10 u8 b;
  11
  12 static u128 __attribute__ ((noinline, noclone))
  13 foo (u128 p)
  14 {
  15   u8 x = ~b;
  16   p &= c;
  17   x *= -p;
  18   x &= a == 0;
  19   x >>= 1;
  20   return p + x;
  21 }
  22
  23 int
  24 main (void)
  25 {
  26   u128 x = foo (0);
  27   if (x != 0)
  28     __builtin_abort ();
  29   return 0;
  30 }