--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/loop-versioning-4.c	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,39 @@
+/* { dg-options "-O3 -fdump-tree-lversion-details" } */
+
+/* These shouldn't be versioned; it's extremely likely that the code
+   is emulating two-dimensional arrays.  */
+
+void
+f1 (double *x, int step, int n)
+{
+  for (int i = 0; i < n; ++i)
+    for (int j = 0; j < n; ++j)
+      x[i * step + j] = 100;
+}
+
+void
+f2 (double *x, int step, int n)
+{
+  for (int i = 0; i < n; ++i)
+    for (int j = 0; j < n; ++j)
+      x[j * step + i] = 100;
+}
+
+void
+f3 (double *x, int *offsets, int step, int n)
+{
+  for (int i = 0; i < n; ++i)
+    for (int j = 0; j < n; ++j)
+      x[i * step + j + offsets[i]] = 100;
+}
+
+void
+f4 (double *x, int *offsets, int step, int n)
+{
+  for (int i = 0; i < n; ++i)
+    for (int j = 0; j < n; ++j)
+      x[j * step + i + offsets[i]] = 100;
+}
+
+/* { dg-final { scan-tree-dump-not {want to version} "lversion" } } */
+/* { dg-final { scan-tree-dump-not {versioned} "lversion" } } */