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1 /* PR middle-end/36106 */
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2 /* { dg-options "-O2" } */
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3 /* { dg-options "-O2 -mcx16" { target { { i?86-*-* x86_64-*-* } && lp64 } } } */
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4
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5 #ifdef __x86_64__
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6 # include "cpuid.h"
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7 #endif
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8
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9 extern void abort (void);
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10
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11 int __attribute__((noinline))
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12 do_test (void)
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13 {
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14 long double d = .0L;
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15 int i;
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16 #pragma omp parallel for shared (d)
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17 for (i = 0; i < 10; i++)
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18 #pragma omp atomic
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19 d += 1.0L;
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20 if (d != 10.0L)
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21 abort ();
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22 return 0;
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23 }
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24
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25 int
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26 main (void)
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27 {
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28 #ifdef __x86_64__
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29 unsigned int eax, ebx, ecx, edx;
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30
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31 if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
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32 return 0;
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33
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34 if (!(ecx & bit_CMPXCHG16B))
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35 return 0;
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36 #endif
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37
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38 do_test ();
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39
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40 return 0;
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41 }
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