1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr33742.c b/gcc/testsuite/gcc.dg/pr33742.c
new file mode 100644
index 000000000..b905d9dda
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr33742.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-vectorize" } */
+
+typedef unsigned short ush;
+extern ush prev[];
+
+void fill_window ()
+{
+  register unsigned n, m;
+
+  for (n = 0; n < 32768; n++)
+    {
+      m = prev[n];
+      prev[n] = (ush) (m >= 0x8000 ? m - 0x8000 : 0);
+    }
+}