File: pr54436.c

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gcc-arm-none-eabi 15%3A8-2019-q3-1
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/* PR target/54436 */
/* { dg-do assemble } */

#if __SIZEOF_SHORT__ == 2 && __SIZEOF_LONG_LONG__ == 8
static inline unsigned short
baz (unsigned short *x)
{
  union U { unsigned short a; unsigned char b[2]; } u = { *x };
  u.b[0] = ((u.b[0] * 0x0802ULL & 0x22110ULL)
	    | (u.b[0] * 0x8020ULL & 0x88440ULL)) * 0x10101ULL >> 16;
  u.b[1] = ((u.b[1] * 0x0802ULL & 0x22110ULL)
	    | (u.b[1] * 0x8020ULL & 0x88440ULL)) * 0x10101ULL >> 16;
  unsigned char t = u.b[0];
  u.b[0] = u.b[1];
  u.b[1] = t;
  return u.a;
}

static inline unsigned long long
bar (unsigned long long *x)
{
  union U { unsigned long long a; unsigned short b[4]; } u = { *x };
  u.b[0] = baz (&u.b[0]);
  return u.a;
}

void
foo (void)
{
  unsigned long long l = -1ULL;
  __asm volatile ("" : : "r" (bar (&l)));
}
#else
void
foo (void)
{
}
#endif