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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-*-* } && ilp32 } } } */
 
#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;
}