{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"//"}]}
                // Extract a scalar component from a pair.
            let (in_scalar, imm) = match (self.val, self.layout.backend_repr) {
                (OperandValue::Pair(a_llval, b_llval), BackendRepr::ScalarPair(a, b)) => {