[Hexagon] Use range-based for loops (NFC)

Author: kazutakahirata

llvm/lib/Target/Hexagon/HexagonISelLoweringHVX.cpp

@@ -1687,28 +1687,27 @@ HexagonTargetLowering::LowerHvxConcatVectors(SDValue Op, SelectionDAG &DAG)
     // all operations are expected to be type-legalized, and i16 is not
     // a legal type. If any of the extracted elements is not of a valid
     // type, sign-extend it to a valid one.
-    for (unsigned i = 0, e = Elems.size(); i != e; ++i) {
-      SDValue V = Elems[i];
+    for (SDValue &V : Elems) {
       MVT Ty = ty(V);
       if (!isTypeLegal(Ty)) {
         MVT NTy = typeLegalize(Ty, DAG);
         if (V.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
-          Elems[i] = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, NTy,
-                                 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NTy,
-                                             V.getOperand(0), V.getOperand(1)),
-                                 DAG.getValueType(Ty));
+          V = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, NTy,
+                          DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NTy,
+                                      V.getOperand(0), V.getOperand(1)),
+                          DAG.getValueType(Ty));
           continue;
         }
         // A few less complicated cases.
         switch (V.getOpcode()) {
           case ISD::Constant:
-            Elems[i] = DAG.getSExtOrTrunc(V, dl, NTy);
+            V = DAG.getSExtOrTrunc(V, dl, NTy);
             break;
           case ISD::UNDEF:
-            Elems[i] = DAG.getUNDEF(NTy);
+            V = DAG.getUNDEF(NTy);
             break;
           case ISD::TRUNCATE:
-            Elems[i] = V.getOperand(0);
+            V = V.getOperand(0);
             break;
           default:
             llvm_unreachable("Unexpected vector element");

llvm/lib/Target/Hexagon/HexagonOptAddrMode.cpp

@@ -448,9 +448,7 @@ bool HexagonOptAddrMode::usedInLoadStore(NodeAddr<StmtNode *> CurrentInstSN,
 
   getAllRealUses(CurrentInstSN, LoadStoreUseList);
   bool FoundLoadStoreUse = false;
-  for (auto I = LoadStoreUseList.begin(), E = LoadStoreUseList.end(); I != E;
-       ++I) {
-    NodeAddr<UseNode *> UN = *I;
+  for (NodeAddr<UseNode *> UN : LoadStoreUseList) {
     NodeAddr<StmtNode *> SN = UN.Addr->getOwner(*DFG);
     MachineInstr *LoadStoreMI = SN.Addr->getCode();
     const MCInstrDesc &MID = LoadStoreMI->getDesc();
@@ -579,8 +577,7 @@ bool HexagonOptAddrMode::processAddBases(NodeAddr<StmtNode *> AddSN,
   // Find all Addi instructions that share the same base register and add them
   // to the AddiList
   getAllRealUses(ReachingDefStmt, AddiUseList);
-  for (auto I = AddiUseList.begin(), E = AddiUseList.end(); I != E; ++I) {
-    NodeAddr<UseNode *> UN = *I;
+  for (NodeAddr<UseNode *> UN : AddiUseList) {
     NodeAddr<StmtNode *> SN = UN.Addr->getOwner(*DFG);
     MachineInstr *MI = SN.Addr->getCode();