--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr50290.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,27 @@
+/* PR rtl-optimization/50290 */
+/* { dg-do run } */
+/* { dg-options "-O2 -fno-tree-loop-optimize -fno-tree-vrp -funroll-loops" } */
+
+static int
+bar (int t[], int b)
+{
+  int i;
+  for (i = 0; i < b; i++)
+    t[i] = i + (i > 0 ? t[i - 1] : 0);
+  return t[b - 1];
+}
+
+static int
+foo (int b)
+{
+  int x[b];
+  return bar (x, b);
+}
+
+int
+main ()
+{
+  if (foo (6) != 15)
+    __builtin_abort ();
+  return 0;
+}