[DAG] tryToFoldExtendSelectLoad - reuse existing SDLoc. NFC.

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Differential Revision: https://phabricator.intern.facebook.com/D60250806

Author: RKSimon

llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

@@ -12812,13 +12812,11 @@ static bool isCompatibleLoad(SDValue N, unsigned ExtOpcode) {
 /// This function is called by the DAGCombiner when visiting sext/zext/aext
 /// dag nodes (see for example method DAGCombiner::visitSIGN_EXTEND).
 static SDValue tryToFoldExtendSelectLoad(SDNode *N, const TargetLowering &TLI,
-                                         SelectionDAG &DAG,
+                                         SelectionDAG &DAG, const SDLoc &DL,
                                          CombineLevel Level) {
   unsigned Opcode = N->getOpcode();
   SDValue N0 = N->getOperand(0);
   EVT VT = N->getValueType(0);
-  SDLoc DL(N);
-
   assert((Opcode == ISD::SIGN_EXTEND || Opcode == ISD::ZERO_EXTEND ||
           Opcode == ISD::ANY_EXTEND) &&
          "Expected EXTEND dag node in input!");
@@ -13775,7 +13773,7 @@ SDValue DAGCombiner::visitSIGN_EXTEND(SDNode *N) {
     return DAG.getNode(ISD::ADD, DL, VT, Zext, DAG.getAllOnesConstant(DL, VT));
   }
 
-  if (SDValue Res = tryToFoldExtendSelectLoad(N, TLI, DAG, Level))
+  if (SDValue Res = tryToFoldExtendSelectLoad(N, TLI, DAG, DL, Level))
     return Res;
 
   return SDValue();
@@ -13860,8 +13858,7 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
   // fold (zext (zext_extend_vector_inreg x)) -> (zext_extend_vector_inreg x)
   if (N0.getOpcode() == ISD::ANY_EXTEND_VECTOR_INREG ||
       N0.getOpcode() == ISD::ZERO_EXTEND_VECTOR_INREG)
-    return DAG.getNode(ISD::ZERO_EXTEND_VECTOR_INREG, SDLoc(N), VT,
-                       N0.getOperand(0));
+    return DAG.getNode(ISD::ZERO_EXTEND_VECTOR_INREG, DL, VT, N0.getOperand(0));
 
   // fold (zext (truncate x)) -> (zext x) or
   //      (zext (truncate x)) -> (truncate x)
@@ -14147,7 +14144,7 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
   if (SDValue V = widenAbs(N, DAG))
     return V;
 
-  if (SDValue Res = tryToFoldExtendSelectLoad(N, TLI, DAG, Level))
+  if (SDValue Res = tryToFoldExtendSelectLoad(N, TLI, DAG, DL, Level))
     return Res;
 
   // CSE zext nneg with sext if the zext is not free.
@@ -14322,7 +14319,7 @@ SDValue DAGCombiner::visitANY_EXTEND(SDNode *N) {
   if (SDValue NewCtPop = widenCtPop(N, DAG))
     return NewCtPop;
 
-  if (SDValue Res = tryToFoldExtendSelectLoad(N, TLI, DAG, Level))
+  if (SDValue Res = tryToFoldExtendSelectLoad(N, TLI, DAG, DL, Level))
     return Res;
 
   return SDValue();