gcc/testsuite/gcc.dg/torture/pr54436.c

   1 /* PR target/54436 */
   2 /* { dg-do assemble } */
   3
   4 #if __SIZEOF_SHORT__ == 2 && __SIZEOF_LONG_LONG__ == 8
   5 static inline unsigned short
   6 baz (unsigned short *x)
   7 {
   8   union U { unsigned short a; unsigned char b[2]; } u = { *x };
   9   u.b[0] = ((u.b[0] * 0x0802ULL & 0x22110ULL)
  10             | (u.b[0] * 0x8020ULL & 0x88440ULL)) * 0x10101ULL >> 16;
  11   u.b[1] = ((u.b[1] * 0x0802ULL & 0x22110ULL)
  12             | (u.b[1] * 0x8020ULL & 0x88440ULL)) * 0x10101ULL >> 16;
  13   unsigned char t = u.b[0];
  14   u.b[0] = u.b[1];
  15   u.b[1] = t;
  16   return u.a;
  17 }
  18
  19 static inline unsigned long long
  20 bar (unsigned long long *x)
  21 {
  22   union U { unsigned long long a; unsigned short b[4]; } u = { *x };
  23   u.b[0] = baz (&u.b[0]);
  24   return u.a;
  25 }
  26
  27 void
  28 foo (void)
  29 {
  30   unsigned long long l = -1ULL;
  31   __asm volatile ("" : : "r" (bar (&l)));
  32 }
  33 #else
  34 void
  35 foo (void)
  36 {
  37 }
  38 #endif