gcc/testsuite/gcc.dg/pr103431.c

   1 /* PR middle-end/103431 */
   2 /* { dg-do run { target int128 } } */
   3 /* { dg-options "-O -fno-tree-bit-ccp -fno-tree-dominator-opts" } */
   4
   5 __attribute__((noipa))
   6 void foo (unsigned short a)
   7 {
   8   __uint128_t b = 5;
   9   int size = __SIZEOF_INT128__ * __CHAR_BIT__ - 1;
  10   a /= 0xfffffffd;
  11   __uint128_t c = (b << (a & size) | b >> (-(a & size) & size));
  12   if (c != 5)
  13     __builtin_abort ();
  14 }
  15
  16 int
  17 main ()
  18 {
  19   foo (0);
  20   return 0;
  21 }