Function switch_128bit

cranelift/frontend/src/switch.rs:612–648

()

    #[test]
    fn switch_128bit() {
        let mut func = Function::new();
        let mut func_ctx = FunctionBuilderContext::new();
        {
            let mut bx = FunctionBuilder::new(&mut func, &mut func_ctx);
            let block0 = bx.create_block();
            bx.switch_to_block(block0);
            let val = bx.ins().iconst(types::I64, 0);
            let val = bx.ins().uextend(types::I128, val);
            let mut switch = Switch::new();
            let block1 = bx.create_block();
            switch.set_entry(1, block1);
            let block2 = bx.create_block();
            switch.set_entry(0, block2);
            let block3 = bx.create_block();
            switch.emit(&mut bx, val, block3);
        }
        let func = func
            .to_string()
            .trim_start_matches("function u0:0() fast {\n")
            .trim_end_matches("\n}\n")
            .to_string();
        assert_eq_output!(
            func,
            "block0:
    v0 = iconst.i64 0
    v1 = uextend.i128 v0  ; v0 = 0
    v2 = iconst.i64 0xffff_ffff
    v3 = sextend.i128 v2  ; v2 = 0xffff_ffff
    v4 = icmp ugt v1, v3
    brif v4, block3, block4

block4:
    v5 = ireduce.i32 v1
    br_table v5, block3, [block2, block1]"
        );
    }

    #[test]
    fn switch_128bit_max_u64() {