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-rw-r--r--libgomp/testsuite/libgomp.c/atomic-5.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/libgomp/testsuite/libgomp.c/atomic-5.c b/libgomp/testsuite/libgomp.c/atomic-5.c
new file mode 100644
index 000000000..168f68dd6
--- /dev/null
+++ b/libgomp/testsuite/libgomp.c/atomic-5.c
@@ -0,0 +1,41 @@
+/* PR middle-end/36106 */
+/* { dg-options "-O2" } */
+/* { dg-options "-O2 -mcx16" { target { { i?86-*-* x86_64-*-* } && lp64 } } } */
+
+#ifdef __x86_64__
+# include "cpuid.h"
+#endif
+
+extern void abort (void);
+
+int __attribute__((noinline))
+do_test (void)
+{
+ long double d = .0L;
+ int i;
+ #pragma omp parallel for shared (d)
+ for (i = 0; i < 10; i++)
+ #pragma omp atomic
+ d += 1.0L;
+ if (d != 10.0L)
+ abort ();
+ return 0;
+}
+
+int
+main (void)
+{
+#ifdef __x86_64__
+ unsigned int eax, ebx, ecx, edx;
+
+ if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
+ return 0;
+
+ if (!(ecx & bit_CMPXCHG16B))
+ return 0;
+#endif
+
+ do_test ();
+
+ return 0;
+}