1 files changed, 34 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/Wunused-var-3.c b/gcc-4.9/gcc/testsuite/gcc.dg/Wunused-var-3.c
new file mode 100644
index 000000000..5954c3b1b
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/Wunused-var-3.c
@@ -0,0 +1,34 @@
+/* PR c/52577 */
+/* { dg-do compile } */
+/* { dg-options "-Wunused" } */
+
+typedef int V __attribute__((vector_size (sizeof (int) * 4)));
+
+void
+f1 (V *p)
+{
+  V mask = { 1, 2, 3, 0 };
+  *p = __builtin_shuffle (*p, mask);
+}
+
+void
+f2 (V *p, V *q)
+{
+  V mask = { 1, 2, 3, 0 };
+  *p = __builtin_shuffle (*p, *q, mask);
+}
+
+void
+f3 (V *p, V *mask)
+{
+  V a = { 1, 2, 3, 0 };
+  *p = __builtin_shuffle (a, *mask);
+}
+
+void
+f4 (V *p, V *mask)
+{
+  V a = { 1, 2, 3, 0 };
+  V b = { 2, 3, 4, 1 };
+  *p = __builtin_shuffle (a, b, *mask);
+}