[llvm] Remove unused local variables (NFC) (#167185)

Identified with bugprone-unused-local-non-trivial-variable.

Author: kazutakahirata

llvm/lib/ExecutionEngine/Orc/TargetProcess/SimpleExecutorMemoryManager.cpp

@@ -36,8 +36,6 @@ Expected<ExecutorAddr> SimpleExecutorMemoryManager::reserve(uint64_t Size) {
 
 Expected<ExecutorAddr>
 SimpleExecutorMemoryManager::initialize(tpctypes::FinalizeRequest &FR) {
-  std::vector<shared::WrapperFunctionCall> DeallocationActions;
-
   if (FR.Segments.empty()) {
     if (FR.Actions.empty())
       return make_error<StringError>("Finalization request is empty",

llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp

@@ -5421,8 +5421,6 @@ combineUnpackingMovIntoLoad(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
   if (!NVPTX::isPackedVectorTy(ElementVT) || ElementVT == MVT::v4i8)
     return SDValue();
 
-  SmallVector<SDNode *> DeadCopyToRegs;
-
   // Check whether all outputs are either used by an extractelt or are
   // glue/chain nodes
   if (!all_of(N->uses(), [&](SDUse &U) {

llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp

@@ -303,8 +303,6 @@ PreservedAnalyses LoopIdiomRecognizePass::run(Loop &L, LoopAnalysisManager &AM,
   // but ORE cannot be preserved (see comment before the pass definition).
   OptimizationRemarkEmitter ORE(L.getHeader()->getParent());
 
-  std::optional<PolynomialInfo> HR;
-
   LoopIdiomRecognize LIR(&AR.AA, &AR.DT, &AR.LI, &AR.SE, &AR.TLI, &AR.TTI,
                          AR.MSSA, DL, ORE);
   if (!LIR.runOnLoop(&L))

llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

@@ -21222,7 +21222,6 @@ BoUpSLP::BlockScheduling::tryScheduleBundle(ArrayRef<Value *> VL, BoUpSLP *SLP,
     }
     ScheduledBundlesList.pop_back();
     SmallVector<ScheduleData *> ControlDependentMembers;
-    SmallPtrSet<Instruction *, 4> Visited;
     for (Value *V : VL) {
       if (S.isNonSchedulable(V))
         continue;