1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/slsr-17.c b/gcc/testsuite/gcc.dg/tree-ssa/slsr-17.c
new file mode 100644
index 00000000000..3da203c205e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/slsr-17.c
@@ -0,0 +1,31 @@
+/* Straight-line strength reduction control flow variation with incr = 1.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O3 -fdump-tree-optimized" } */
+
+int
+f (int n, int c, int s)
+{
+  int a2, a3, a4, x1, x2, x3, x4;
+
+  x1 = c + s;
+  x2 = x3 = x4 = c;
+
+  if (n > 64)
+    {
+      a2 = 2 * s;
+      x2 = c + a2;
+      a3 = 3 * s;
+      x3 = c + a3;
+    }
+  else
+    {
+      a4 = 2 * s;
+      x4 = c + a4;
+    }
+
+  return x1 + x2 + x3 + x4;
+}
+
+/* { dg-final { scan-tree-dump-times " \\* " 0 "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */