| /* PR middle-end/36106 */ |
| /* { dg-options "-O2" } */ |
| /* { dg-options "-O2 -march=i586" { target { { i?86-*-* x86_64-*-* } && ilp32 } } } */ |
| |
| #ifdef __i386__ |
| # include "../../../gcc/config/i386/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) |
| do_test (); |
| #else |
| do_test (); |
| #endif |
| return 0; |
| } |
