gcc/testsuite/gcc.dg/pr81020.c

   1 /* PR rtl-optimization/81020 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O -fno-tree-bit-ccp -fno-tree-coalesce-vars -fno-tree-vrp" } */
   4
   5 unsigned v = 4;
   6
   7 unsigned long long __attribute__((noipa))
   8 foo (unsigned x)
   9 {
  10 #if __SIZEOF_INT__ == 2
  11   __UINT32_TYPE__ a = v;
  12 #else
  13   unsigned a = v;
  14 #endif
  15   a &= 1;
  16   x |= 0 < a;
  17   a >>= 31;
  18   return x + a;
  19 }
  20
  21 int
  22 main ()
  23 {
  24   if (foo (2) != 2)
  25     __builtin_abort ();
  26   return 0;
  27 }