--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/gomp/simd8.c	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,37 @@
+/* { dg-do compile } */
+/* { dg-options "-fopenmp -O3 -fdump-tree-vect-details" } */
+/* { dg-final { scan-tree-dump-times "vectorized 0 loops in function" 4 "vect" } } */
+
+int a[1024];
+
+void
+foo (void)
+{
+  #pragma omp simd if (0)
+  for (int i = 0; i < 1024; ++i)
+    a[i] = a[i] + 1;
+}
+
+void
+bar (void)
+{
+  #pragma omp simd if (0) safelen (256) simdlen (8)
+  for (int i = 0; i < 512; ++i)
+    a[i] = a[i] + 1;
+}
+
+void
+baz (void)
+{
+  #pragma omp simd safelen (256) simdlen (1)
+  for (int i = 0; i < 512; ++i)
+    a[i] = a[i] + 1;
+}
+
+void
+qux (void)
+{
+  #pragma omp simd simdlen (1) if (1)
+  for (int i = 0; i < 512; ++i)
+    a[i] = a[i] + 1;
+}