Rollup merge of #125222 - Oneirical:fifth, r=jieyouxu

Migrate `run-make/issue-46239` to `rmake`

Part of #121876 and the associated [Google Summer of Code project](https://blog.rust-lang.org/2024/05/01/gsoc-2024-selected-projects.html).

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/codegen/noalias-freeze.rs b/tests/codegen/noalias-freeze.rs
new file mode 100644
index 00000000000..8086f3afbbc
--- /dev/null
+++ b/tests/codegen/noalias-freeze.rs
@@ -0,0 +1,21 @@
+//@ compile-flags: -Copt-level=1
+
+// References returned by a Frozen pointer type
+// could be marked as "noalias", which caused miscompilation errors.
+// This test runs the most minimal possible code that can reproduce this bug,
+// and checks that noalias does not appear.
+// See https://github.com/rust-lang/rust/issues/46239
+
+#![crate_type = "lib"]
+
+fn project<T>(x: &(T,)) -> &T { &x.0 }
+
+fn dummy() {}
+
+// CHECK-LABEL: @foo(
+// CHECK-NOT: noalias
+#[no_mangle]
+pub fn foo() {
+    let f = (dummy as fn(),);
+    (*project(&f))();
+}