[DAG] narrowExtractedVectorLoad - reuse existing SDLoc. NFC (llvm#136870)

Author: RKSimon

llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

@@ -25243,7 +25243,8 @@ static SDValue narrowExtractedVectorBinOp(SDNode *Extract, SelectionDAG &DAG,
 /// If we are extracting a subvector from a wide vector load, convert to a
 /// narrow load to eliminate the extraction:
 /// (extract_subvector (load wide vector)) --> (load narrow vector)
-static SDValue narrowExtractedVectorLoad(SDNode *Extract, SelectionDAG &DAG) {
+static SDValue narrowExtractedVectorLoad(SDNode *Extract, const SDLoc &DL,
+                                         SelectionDAG &DAG) {
   // TODO: Add support for big-endian. The offset calculation must be adjusted.
   if (DAG.getDataLayout().isBigEndian())
     return SDValue();
@@ -25283,8 +25284,6 @@ static SDValue narrowExtractedVectorLoad(SDNode *Extract, SelectionDAG &DAG) {
 
   // The narrow load will be offset from the base address of the old load if
   // we are extracting from something besides index 0 (little-endian).
-  SDLoc DL(Extract);
-
   // TODO: Use "BaseIndexOffset" to make this more effective.
   SDValue NewAddr = DAG.getMemBasePlusOffset(Ld->getBasePtr(), Offset, DL);
 
@@ -25468,7 +25467,7 @@ SDValue DAGCombiner::visitEXTRACT_SUBVECTOR(SDNode *N) {
     return DAG.getUNDEF(NVT);
 
   if (TLI.isOperationLegalOrCustomOrPromote(ISD::LOAD, NVT))
-    if (SDValue NarrowLoad = narrowExtractedVectorLoad(N, DAG))
+    if (SDValue NarrowLoad = narrowExtractedVectorLoad(N, DL, DAG))
       return NarrowLoad;
 
   // Combine an extract of an extract into a single extract_subvector.