[Transforms] Use llvm::append_range (NFC) (#133607)

Author: kazutakahirata

llvm/lib/Transforms/AggressiveInstCombine/TruncInstCombine.cpp

@@ -77,8 +77,7 @@ static void getRelevantOperands(Instruction *I, SmallVectorImpl<Value *> &Ops) {
     Ops.push_back(I->getOperand(2));
     break;
   case Instruction::PHI:
-    for (Value *V : cast<PHINode>(I)->incoming_values())
-      Ops.push_back(V);
+    llvm::append_range(Ops, cast<PHINode>(I)->incoming_values());
     break;
   default:
     llvm_unreachable("Unreachable!");

llvm/lib/Transforms/IPO/SampleProfile.cpp

@@ -1267,8 +1267,7 @@ bool SampleProfileLoader::tryInlineCandidate(
   // Now populate the list of newly exposed call sites.
   if (InlinedCallSites) {
     InlinedCallSites->clear();
-    for (auto &I : IFI.InlinedCallSites)
-      InlinedCallSites->push_back(I);
+    llvm::append_range(*InlinedCallSites, IFI.InlinedCallSites);
   }
 
   if (FunctionSamples::ProfileIsCS)

llvm/lib/Transforms/Scalar/DFAJumpThreading.cpp

@@ -164,8 +164,7 @@ class DFAJumpThreading {
       unfold(&DTU, LI, SIToUnfold, &NewSIsToUnfold, &NewBBs);
 
       // Put newly discovered select instructions into the work list.
-      for (const SelectInstToUnfold &NewSIToUnfold : NewSIsToUnfold)
-        Stack.push_back(NewSIToUnfold);
+      llvm::append_range(Stack, NewSIsToUnfold);
     }
   }
 

llvm/lib/Transforms/Scalar/StructurizeCFG.cpp

@@ -737,12 +737,10 @@ void StructurizeCFG::findUndefBlocks(
     if (!VisitedBlock.insert(Current).second)
       continue;
 
-    if (FlowSet.contains(Current)) {
-      for (auto P : predecessors(Current))
-        Stack.push_back(P);
-    } else if (!Incomings.contains(Current)) {
+    if (FlowSet.contains(Current))
+      llvm::append_range(Stack, predecessors(Current));
+    else if (!Incomings.contains(Current))
       UndefBlks.push_back(Current);
-    }
   }
 }
 

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -6929,10 +6929,9 @@ void LoopVectorizationCostModel::collectValuesToIgnore() {
     DeadInterleavePointerOps.append(Op->op_begin(), Op->op_end());
   }
 
-  for (const auto &[_, Ops] : DeadInvariantStoreOps) {
-    for (Value *Op : ArrayRef(Ops).drop_back())
-      DeadOps.push_back(Op);
-  }
+  for (const auto &[_, Ops] : DeadInvariantStoreOps)
+    llvm::append_range(DeadOps, ArrayRef(Ops).drop_back());
+
   // Mark ops that would be trivially dead and are only used by ignored
   // instructions as free.
   BasicBlock *Header = TheLoop->getHeader();