1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr36991.c b/gcc/testsuite/gcc.dg/pr36991.c
new file mode 100644
index 000000000..d090ba105
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr36991.c
@@ -0,0 +1,12 @@
+/* PR tree-optimization/36991 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+typedef float V __attribute__ ((vector_size (16)));
+typedef union { V v[4][4]; } U;
+
+void
+foo (float x, float y, U *z)
+{
+  z->v[1][0] = z->v[0][1] = (V) { x, y, 0, 0 };
+}