Method encode_as_value

cranelift/codegen/src/ir/instructions.rs:222–231

Encode this block argument as a `Value` for storage in the value pool. Internal to `BlockCall`, must not be used elsewhere to avoid exposing the raw bit encoding.

(&self)

    /// value pool. Internal to `BlockCall`, must not be used
    /// elsewhere to avoid exposing the raw bit encoding.
    fn encode_as_value(&self) -> Value {
        let (tag, payload) = match *self {
            BlockArg::Value(v) => (0, v.as_bits()),
            BlockArg::TryCallRet(i) => (1, i),
            BlockArg::TryCallExn(i) => (2, i),
        };
        assert!(payload < (1 << 30));
        let raw = (tag << 30) | payload;
        Value::from_bits(raw)
    }

    /// Decode a raw `Value` encoding of this block argument.
    fn decode_from_value(v: Value) -> Self {