rewrite allocator-shim-circular-deps to ui test

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -1,4 +1,3 @@
-run-make/allocator-shim-circular-deps/Makefile
 run-make/archive-duplicate-names/Makefile
 run-make/atomic-lock-free/Makefile
 run-make/branch-protection-check-IBT/Makefile

tests/run-make/allocator-shim-circular-deps/rmake.rs

@@ -0,0 +1,16 @@
+// This test is designed to intentionally introduce a circular dependency scenario to check
+// that a specific compiler bug doesn't make a resurgence.
+// The bug in question arose when at least one crate
+// required a global allocator, and that crate was placed after
+// the one defining it in the linker order.
+// The generated symbols.o should not result in any linker errors.
+// See https://github.com/rust-lang/rust/issues/112715
+
+//@ ignore-cross-compile
+
+use run_make_support::{rust_lib_name, rustc};
+
+fn main() {
+    rustc().input("my_lib.rs").run();
+    rustc().input("main.rs").arg("--test").extern_("my_lib", rust_lib_name("my_lib")).run();
+}

tests/run-make/separate-link/rmake.rs

@@ -1,5 +1,5 @@
 // The compiler flags no-link (and by extension, link-only) used to be broken
-// due to changes in encoding/decoding. This was patched, and this test ensures
+// due to changes in encoding/decoding. This was patched, and this test checks
 // that these flags are not broken again, resulting in successful compilation.
 // See https://github.com/rust-lang/rust/issues/77857