gcc/testsuite/gcc.dg/torture/pr56420.c

   1 /* PR middle-end/56420 */
   2 /* { dg-do run { target int128 } } */
   3
   4 extern void abort (void);
   5
   6 __attribute__((noinline, noclone)) __uint128_t
   7 foo (__uint128_t x)
   8 {
   9   return x * (((__uint128_t) -1) << 63);
  10 }
  11
  12 __attribute__((noinline, noclone)) __uint128_t
  13 bar (__uint128_t x)
  14 {
  15   return x * (((__uint128_t) 1) << 63);
  16 }
  17
  18 __attribute__((noinline, noclone)) __uint128_t
  19 baz (__uint128_t x)
  20 {
  21   return x * -(((__uint128_t) 1) << 62);
  22 }
  23
  24 int
  25 main ()
  26 {
  27   if (foo (1) != (((__uint128_t) -1) << 63)
  28       || foo (8) != (((__uint128_t) -1) << 66))
  29     abort ();
  30   if (bar (1) != (((__uint128_t) 1) << 63)
  31       || bar (8) != (((__uint128_t) 1) << 66))
  32     abort ();
  33   if (baz (1) != -(((__uint128_t) 1) << 62)
  34       || baz (8) != ((-(((__uint128_t) 1) << 62)) << 3))
  35     abort ();
  36   return 0;
  37 }