rewrite test-benches to rmake

Author: Oneirical

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -100,7 +100,6 @@ run-make/staticlib-dylib-linkage/Makefile
 run-make/symbol-mangling-hashed/Makefile
 run-make/symbol-visibility/Makefile
 run-make/sysroot-crates-are-unstable/Makefile
-run-make/test-benches/Makefile
 run-make/thumb-none-cortex-m/Makefile
 run-make/thumb-none-qemu/Makefile
 run-make/translation/Makefile

tests/run-make/test-benches/Makefile

@@ -0,0 +1,21 @@
+// #[bench] is a Rust feature to run benchmarks on performance-critical
+// code, which previously experienced a runtime panic bug in #103794.
+// In order to ensure future breakages of this feature are detected, this
+// smoke test was created, using the benchmarking feature with various
+// runtime flags.
+// See https://github.com/rust-lang/rust/issues/103794
+
+//@ ignore-cross-compile
+// Reason: the compiled binary is executed
+//@ needs-unwind
+// Reason: #[bench] and -Zpanic-abort-tests can't be combined
+
+use run_make_support::{run, run_with_args, rustc};
+
+fn main() {
+    rustc().arg("--test").input("smokebench.rs").opt().run();
+    run_with_args("smokebench", &["--bench"]);
+    run_with_args("smokebench", &["--bench", "noiter"]);
+    run_with_args("smokebench", &["--bench", "yesiter"]);
+    run("smokebench");
+}