gcc/libgomp/testsuite/libgomp.c/atomic-4.c

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/* PR middle-end/35611 */
extern void abort (void);
int
main (void)
{
long double d = .0L;
int i;
#pragma omp parallel for shared (d)
for (i = 0; i < 1000; i++)
#pragma omp atomic
d += 1.0L;
if (d != 1000.0L)
abort ();
return 0;
}