1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.target/i386/vec-may_alias.c b/gcc/testsuite/gcc.target/i386/vec-may_alias.c
new file mode 100644
index 00000000000..e970497454f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/vec-may_alias.c
@@ -0,0 +1,25 @@
+/* { dg-do run } */
+/* { dg-options "-O2 -w -Wno-abi" } */
+
+typedef int v2si __attribute__ ((vector_size (8)));
+typedef short v4hi __attribute__ ((vector_size (8)));
+typedef short v4hia __attribute__ ((vector_size (8), may_alias));
+
+__attribute__ ((noinline, noclone))
+int f (v2si A, int N)
+{ return ((v4hia)A)[N]; }
+
+__attribute__ ((noinline, noclone))
+int g (v2si A, int N)
+{ return ((v4hi)A)[N]; }
+
+int main()
+{
+  v2si x = { 0, 0 }, y = { 1, 1 };
+  if (f (x, 0) || f (x, 1) || f (x, 2) || f (x, 3))
+    __builtin_abort ();
+  if (g (y, 0) != 1 || g (y, 1) || g (y, 2) != 1 || g (y, 3))
+    __builtin_abort ();
+  return 0;
+}
+