for (SDNode::use_iterator U = N->use_begin(), E = SDNode::use_end();
U != E; ++U) {
if (SIRI->isSGPRClass(getOperandRegClass(*U, U.getOperandNo()))) {
for (SDNode::use_iterator U = N->use_begin(), E = SDNode::use_end();
U != E; ++U) {
if (SIRI->isSGPRClass(getOperandRegClass(*U, U.getOperandNo()))) {