Function function_references

cranelift/interpreter/src/interpreter.rs:646–674

()

    // single function at a time--we need more than one function in the store for this test.
    #[test]
    fn function_references() {
        let code = "
        function %child(i32) -> i32 {
        block0(v0: i32):
            v2 = iconst.i32 -1
            v1 = iadd v0, v2
            return v1
        }

        function %parent(i32) -> i32 {
            fn42 = %child(i32) -> i32
        block0(v0: i32):
            v3 = iconst.i32 1
            v1 = iadd v0, v3
            v2 = call fn42(v1)
            return v2
        }";

        let mut env = FunctionStore::default();
        let funcs = parse_functions(code).unwrap().to_vec();
        funcs.iter().for_each(|f| env.add(f.name.to_string(), f));

        let state = InterpreterState::default().with_function_store(env);
        let result = Interpreter::new(state)
            .call_by_name("%parent", &[DataValue::I32(0)])
            .unwrap();

        assert_eq!(result, ControlFlow::Return(smallvec![DataValue::I32(0)]));
    }

    #[test]
    fn fuel() {