cleanup: handle -Zmutable-noalias like -Zbox-noalias

1 files changed, 23 insertions, 0 deletions

diff --git a/src/test/codegen/noalias-flag.rs b/src/test/codegen/noalias-flag.rs
new file mode 100644
index 00000000000..a9ec61e286d
--- /dev/null
+++ b/src/test/codegen/noalias-flag.rs
@@ -0,0 +1,23 @@
+// compile-flags: -O -Zmutable-noalias=no
+
+#![crate_type = "lib"]
+
+// `-Zmutable-noalias=no` should disable noalias on mut refs...
+
+// CHECK-LABEL: @test_mut_ref(
+// CHECK-NOT: noalias
+// CHECK-SAME: %x
+#[no_mangle]
+pub fn test_mut_ref(x: &mut i32) -> &mut i32 {
+    x
+}
+
+// ...but not on shared refs
+
+// CHECK-LABEL: @test_ref(
+// CHECK-SAME: noalias
+// CHECK-SAME: %x
+#[no_mangle]
+pub fn test_ref(x: &i32) -> &i32 {
+    x
+}