1 files changed, 53 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/autopar/runtime-auto.c b/gcc/testsuite/gcc.dg/autopar/runtime-auto.c
new file mode 100644
index 0000000..c1a3131
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/autopar/runtime-auto.c
@@ -0,0 +1,53 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-parallelize-loops -fdump-tree-parloops2-details" } */
+
+void abort (void);
+
+#define N 1000
+
+int a[N], b[N], c[N];
+
+void
+test_parallel_loop (void)
+{
+  int i;
+
+  /* This loop should be auto-parallelized when -ftree-parallelize-loops
+     (without =number) is used for runtime thread detection via OMP_NUM_THREADS.  */
+  for (i = 0; i < N; i++)
+    a[i] = b[i] + c[i];
+}
+
+int
+main (void)
+{
+  int i;
+
+  for (i = 0; i < N; i++)
+    {
+      b[i] = i;
+      c[i] = i * 2;
+    }
+
+  test_parallel_loop ();
+
+  for (i = 0; i < N; i++)
+    {
+      if (a[i] != b[i] + c[i])
+	abort ();
+    }
+
+  return 0;
+}
+
+/* Check that the loop is parallelized with runtime thread detection.  */
+/* { dg-final { scan-tree-dump "parallelizing" "parloops2" } } */
+
+/* Check that "#pragma omp parallel" is generated.  */
+/* { dg-final { scan-tree-dump "pragma omp parallel" "parloops2" } } */
+
+/* Check that instead of generating a num_threads(x) clause, the compiler calls
+   "__builtin_omp_get_num_threads" that will set the number of threads at
+   program execution time.  */
+/* { dg-final { scan-tree-dump "__builtin_omp_get_num_threads" "parloops2" } } */
+