Function check

cranelift/frontend/src/frontend.rs:1319–1327

(func: &Function, expected_ir: &str)

    #[track_caller]
    fn check(func: &Function, expected_ir: &str) {
        let expected_ir = expected_ir.trim();
        let actual_ir = func.display().to_string();
        let actual_ir = actual_ir.trim();
        assert!(
            expected_ir == actual_ir,
            "Expected:\n{expected_ir}\nGot:\n{actual_ir}"
        );
    }

    /// Helper function to construct a fixed frontend configuration.
    fn systemv_frontend_config() -> TargetFrontendConfig {