1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/slsr-25.c b/gcc/testsuite/gcc.dg/tree-ssa/slsr-25.c
new file mode 100644
index 00000000000..9e16e0476cd
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/slsr-25.c
@@ -0,0 +1,31 @@
+/* Verify straight-line strength reduction for multiply candidates
+   with variable stride and control flow, increment = -1.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O3 -fdump-tree-optimized" } */
+
+int 
+f (int n, int x, int stride)
+{
+  int a, x1, x2, x3;
+
+  a = x * stride;
+
+  if (n > 64)
+    {
+      x1 = x - 1;
+      a += x1 * stride;
+      x2 = x1 - 1;
+      a += x2 * stride;
+    }
+  else
+    {
+      x3 = x - 1;
+      a += x3 * stride;
+    }
+
+  return a;
+}
+
+/* { dg-final { scan-tree-dump-times " \\* " 1 "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */