gcc/testsuite/gcc.target/i386/pr78262.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target int128 } */
   3 /* { dg-options "-O -fschedule-insns" } */
   4
   5 typedef unsigned char u8;
   6 typedef unsigned __int128 u128;
   7
   8 static u128 u128_0;
   9 static u128 *p128;
  10
  11 u128 __attribute__ ((noinline, noclone))
  12 foo(u8 u8_0)
  13 {
  14   p128 = &u128_0;
  15   u128_0 = u8_0;
  16   u128_0 = u128_0 << 127 | u128_0 >> 1;
  17   u128_0 >>= (u8)u128_0;
  18   return 2 + u128_0;
  19 }
  20
  21 int
  22 main()
  23 {
  24   u128 x = foo(5);
  25   if (p128 != &u128_0)
  26     __builtin_abort();
  27   if (u128_0 != ((u128)2 << 124))
  28     __builtin_abort();
  29   if (x != ((u128)2 << 124) + 2)
  30     __builtin_abort();
  31   return 0;
  32 }