{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
                let const_val = const_val.to_bits(layout.size);
            ty::Uint(UintTy::U128) | ty::Int(IntTy::I128) => {
                let lsb = fx.bcx.ins().iconst(types::I64, const_val as u64 as i64);