Function nop

cranelift/filetests/src/function_runner.rs:845–880

()

    #[test]
    fn nop() {
        // Skip this test when cranelift doesn't support the native platform.
        if cranelift_native::builder().is_err() {
            return;
        }
        let code = String::from(
            "
            test run
            function %test() -> i8 {
            block0:
                nop
                v1 = iconst.i8 -1
                return v1
            }",
        );
        let ctrl_plane = &mut ControlPlane::default();

        // extract function
        let test_file = parse_test(code.as_str(), ParseOptions::default()).unwrap();
        assert_eq!(1, test_file.functions.len());
        let function = test_file.functions[0].0.clone();

        // execute function
        let mut compiler = TestFileCompiler::with_default_host_isa().unwrap();
        compiler.declare_function(&function).unwrap();
        compiler
            .define_function(function.clone(), ctrl_plane)
            .unwrap();
        compiler
            .create_trampoline_for_function(&function, ctrl_plane)
            .unwrap();
        let compiled = compiler.compile().unwrap();
        let trampoline = compiled.get_trampoline(&function).unwrap();
        let returned = trampoline.call(&compiled, &[]);
        assert_eq!(returned, vec![DataValue::I8(-1)])
    }

    #[test]
    fn trampolines() {