46 lines
651 B
C
46 lines
651 B
C
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/* { dg-do run } */
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#include <stdio.h>
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#include <omp.h>
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extern void abort (void);
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int
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main ()
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{
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int bad, x;
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x = 2;
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bad = 0;
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#pragma omp parallel num_threads(2) shared(x, bad)
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{
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if (omp_get_thread_num () == 0)
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{
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volatile int i;
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for (i = 0; i < 100000000; i++)
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x = 5;
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}
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else
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{
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/* Print 1: the following read of x has a race */
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if (x != 2 && x != 5)
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bad = 1;
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}
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#pragma omp barrier
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if (omp_get_thread_num () == 0)
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{
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/* x must be 5 now. */
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if (x != 5)
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bad = 1;
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}
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else
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{
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/* x must be 5 now. */
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if (x != 5)
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bad = 1;
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}
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}
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if (bad)
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abort ();
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return 0;
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}
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