implement suggestion

Author: Oneirical

tests/codegen/noalias-freeze.rs

@@ -6,12 +6,16 @@
 // 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
-fn main() {
+#[no_mangle]
+pub fn foo() {
     let f = (dummy as fn(),);
     (*project(&f))();
-}
+}