{"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"let"}]}
        let bits = val.to_bits(layout.size)?; // these operations all ignore the sign
        assert!(layout.ty.is_integral(), "invalid type for numeric intrinsic: {}", layout.ty);
        let extra = 128 - u128::from(layout.size.bits());