Function basic

cranelift/codegen/src/write.rs:632–680

()

    #[test]
    fn basic() {
        let mut f = Function::new();
        assert_eq!(f.to_string(), "function u0:0() fast {\n}\n");

        f.name = UserFuncName::testcase("foo");
        assert_eq!(f.to_string(), "function %foo() fast {\n}\n");

        f.create_sized_stack_slot(StackSlotData::new(StackSlotKind::ExplicitSlot, 4, 0));
        assert_eq!(
            f.to_string(),
            "function %foo() fast {\n    ss0 = explicit_slot 4\n}\n"
        );

        let block = f.dfg.make_block();
        f.layout.append_block(block);
        assert_eq!(
            f.to_string(),
            "function %foo() fast {\n    ss0 = explicit_slot 4\n\nblock0:\n}\n"
        );

        f.dfg.append_block_param(block, types::I8);
        assert_eq!(
            f.to_string(),
            "function %foo() fast {\n    ss0 = explicit_slot 4\n\nblock0(v0: i8):\n}\n"
        );

        f.dfg.append_block_param(block, types::F32.by(4).unwrap());
        assert_eq!(
            f.to_string(),
            "function %foo() fast {\n    ss0 = explicit_slot 4\n\nblock0(v0: i8, v1: f32x4):\n}\n"
        );

        {
            let mut cursor = FuncCursor::new(&mut f);
            cursor.set_position(CursorPosition::After(block));
            cursor.ins().return_(&[])
        };
        assert_eq!(
            f.to_string(),
            "function %foo() fast {\n    ss0 = explicit_slot 4\n\nblock0(v0: i8, v1: f32x4):\n    return\n}\n"
        );

        let mut f = Function::new();
        f.create_sized_stack_slot(StackSlotData::new(StackSlotKind::ExplicitSlot, 4, 2));
        assert_eq!(
            f.to_string(),
            "function u0:0() fast {\n    ss0 = explicit_slot 4, align = 4\n}\n"
        );
    }

    #[test]
    fn aliases() {