SDOperand visitLOAD(SDNode *N);
SDOperand visitSTORE(SDNode *N);
+ SDOperand visitLOCATION(SDNode *N);
+ SDOperand visitDEBUGLOC(SDNode *N);
+
bool SimplifySelectOps(SDNode *SELECT, SDOperand LHS, SDOperand RHS);
SDOperand SimplifySelect(SDOperand N0, SDOperand N1, SDOperand N2);
SDOperand SimplifySelectCC(SDOperand N0, SDOperand N1, SDOperand N2,
case ISD::BRTWOWAY_CC: return visitBRTWOWAY_CC(N);
case ISD::LOAD: return visitLOAD(N);
case ISD::STORE: return visitSTORE(N);
+ case ISD::LOCATION: return visitLOCATION(N);
+ case ISD::DEBUG_LOC: return visitDEBUGLOC(N);
}
return SDOperand();
}
return SDOperand();
}
+SDOperand DAGCombiner::visitLOCATION(SDNode *N) {
+ SDOperand Chain = N->getOperand(0);
+
+ // Remove redundant locations (last one holds)
+ if (Chain.getOpcode() == ISD::LOCATION && Chain.hasOneUse()) {
+ return DAG.getNode(ISD::LOCATION, MVT::Other, Chain.getOperand(0),
+ N->getOperand(1),
+ N->getOperand(2),
+ N->getOperand(3),
+ N->getOperand(4));
+ }
+
+ return SDOperand();
+}
+
+SDOperand DAGCombiner::visitDEBUGLOC(SDNode *N) {
+ SDOperand Chain = N->getOperand(0);
+
+ // Remove redundant debug locations (last one holds)
+ if (Chain.getOpcode() == ISD::DEBUG_LOC && Chain.hasOneUse()) {
+ return DAG.getNode(ISD::DEBUG_LOC, MVT::Other, Chain.getOperand(0),
+ N->getOperand(1),
+ N->getOperand(2),
+ N->getOperand(3));
+ }
+
+ return SDOperand();
+}
+
SDOperand DAGCombiner::SimplifySelect(SDOperand N0, SDOperand N1, SDOperand N2){
assert(N0.getOpcode() ==ISD::SETCC && "First argument must be a SetCC node!");