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/* PR middle-end/36106 */

/* { dg-options "-O2" } */

/* { dg-options "-O2 -mieee" { target alpha*-*-* } } */

/* { dg-options "-O2 -march=i586" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */

#ifdef __i386__

# include "cpuid.h"

#endif

extern void abort (void);

union { unsigned long long l; double d; } u = { .l = 0x7ff0000000072301ULL };

int __attribute__((noinline))

do_test (void)

{

#pragma omp atomic

  u.d += 1.0L;

  return 0;

}

int

main (void)

{

#ifdef __i386__

  unsigned int eax, ebx, ecx, edx;

  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))

    return 0;

  if (!(edx & bit_CMPXCHG8B))

    return 0;

#endif

  do_test ();

  return 0;

}