[Target] Remove unused local variables (NFC) (#138443)

Author: kazutakahirata

llvm/lib/Target/AArch64/AArch64ISelLowering.cpp

@@ -7974,7 +7974,6 @@ SDValue AArch64TargetLowering::LowerFormalArguments(
   assert(Chain.getOpcode() == ISD::EntryToken && "Unexpected Chain value");
   SDValue Glue = Chain.getValue(1);
 
-  SmallVector<SDValue, 16> ArgValues;
   unsigned ExtraArgLocs = 0;
   for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
     CCValAssign &VA = ArgLocs[i - ExtraArgLocs];
@@ -18253,7 +18252,6 @@ static SDValue performVecReduceAddCombine(SDNode *N, SelectionDAG &DAG,
     return VecReduceAdd16;
 
   // Generate the remainder Dot operation that is multiple of 8.
-  SmallVector<SDValue, 4> SDotVec8;
   SDValue Zeros = DAG.getConstant(0, DL, MVT::v2i32);
   SDValue Vec8Op0 =
       DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v8i8, A.getOperand(0),

llvm/lib/Target/AArch64/AArch64RegisterInfo.cpp

@@ -1192,7 +1192,6 @@ bool AArch64RegisterInfo::getRegAllocationHints(
         // operands. Look for a valid starting register for the group.
         for (unsigned I = 0; I < StridedOrder.size(); ++I) {
           MCPhysReg Reg = StridedOrder[I];
-          SmallVector<MCPhysReg> Regs;
 
           // If the FORM_TRANSPOSE nodes use the ZPRMul classes, the starting
           // register of the first load should be a multiple of 2 or 4.

llvm/lib/Target/AArch64/MCTargetDesc/AArch64ELFStreamer.cpp

@@ -479,7 +479,6 @@ void AArch64TargetELFStreamer::finish() {
     }
     if (Syms.size() != NumSyms) {
       SmallVector<const MCSymbol *, 0> NewSyms;
-      DenseMap<MCSection *, size_t> Cnt;
       Syms.truncate(NumSyms);
       // Find the last symbol index for each candidate section.
       for (auto [I, Sym] : llvm::enumerate(Syms)) {

llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp

@@ -1539,8 +1539,6 @@ bool AMDGPUCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
   }
 
   // Do the actual argument marshalling.
-  SmallVector<Register, 8> PhysRegs;
-
   OutgoingValueAssigner Assigner(AssignFnFixed, AssignFnVarArg);
   if (!determineAssignments(Assigner, OutArgs, CCInfo))
     return false;

llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp

@@ -957,8 +957,6 @@ class MFMAExpInterleaveOpt final : public IGLPStrategy {
       auto *DAG = SyncPipe[0].DAG;
 
       if (Cache->empty()) {
-        SmallVector<SUnit *, 8> Worklist;
-
         auto I = DAG->SUnits.begin();
         auto E = DAG->SUnits.end();
         for (; I != E; I++) {
@@ -1290,7 +1288,6 @@ class MFMAExpInterleaveOpt final : public IGLPStrategy {
     bool apply(const SUnit *SU, const ArrayRef<SUnit *> Collection,
                SmallVectorImpl<SchedGroup> &SyncPipe) override {
 
-      SmallVector<SUnit *, 12> Worklist;
       auto *DAG = SyncPipe[0].DAG;
       if (Cache->empty()) {
         for (auto &SU : DAG->SUnits)

llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp

@@ -1135,7 +1135,6 @@ bool AMDGPURegisterBankInfo::applyMappingLoad(
   if (LoadSize <= MaxNonSmrdLoadSize)
     return false;
 
-  SmallVector<Register, 16> DefRegs(OpdMapper.getVRegs(0));
   SmallVector<Register, 1> SrcRegs(OpdMapper.getVRegs(1));
 
   if (SrcRegs.empty())

llvm/lib/Target/AMDGPU/R600ISelLowering.cpp

@@ -1463,7 +1463,6 @@ SDValue R600TargetLowering::LowerFormalArguments(
   CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
                  *DAG.getContext());
   MachineFunction &MF = DAG.getMachineFunction();
-  SmallVector<ISD::InputArg, 8> LocalIns;
 
   if (AMDGPU::isShader(CallConv)) {
     CCInfo.AnalyzeFormalArguments(Ins, CCAssignFnForCall(CallConv, isVarArg));

llvm/lib/Target/AMDGPU/SIFoldOperands.cpp

@@ -1629,7 +1629,6 @@ bool SIFoldOperandsImpl::foldCopyToAGPRRegSequence(MachineInstr *CopyMI) const {
 
   MachineInstrBuilder B(*MBB.getParent(), CopyMI);
   DenseMap<TargetInstrInfo::RegSubRegPair, Register> VGPRCopies;
-  SmallSetVector<TargetInstrInfo::RegSubRegPair, 32> SeenInputs;
 
   const TargetRegisterClass *UseRC =
       MRI->getRegClass(CopyMI->getOperand(1).getReg());

llvm/lib/Target/AMDGPU/SIISelLowering.cpp

@@ -3235,7 +3235,6 @@ SITargetLowering::LowerReturn(SDValue Chain, CallingConv::ID CallConv,
 
   // CCValAssign - represent the assignment of the return value to a location.
   SmallVector<CCValAssign, 48> RVLocs;
-  SmallVector<ISD::OutputArg, 48> Splits;
 
   // CCState - Info about the registers and stack slots.
   CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,

llvm/lib/Target/ARM/ARMFrameLowering.cpp

@@ -1891,7 +1891,6 @@ void ARMFrameLowering::emitFPStatusRestores(
   MachineFunction &MF = *MBB.getParent();
   const TargetInstrInfo &TII = *MF.getSubtarget().getInstrInfo();
 
-  SmallVector<MCRegister> Regs;
   auto RegPresent = [&CSI](MCRegister Reg) {
     return llvm::any_of(CSI, [Reg](const CalleeSavedInfo &C) {
       return C.getReg() == Reg;

llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp

@@ -2436,7 +2436,6 @@ static bool canTailPredicateLoop(Loop *L, LoopInfo *LI, ScalarEvolution &SE,
 
   // Next, check that all instructions can be tail-predicated.
   PredicatedScalarEvolution PSE = LAI->getPSE();
-  SmallVector<Instruction *, 16> LoadStores;
   int ICmpCount = 0;
 
   for (BasicBlock *BB : L->blocks()) {

llvm/lib/Target/Hexagon/AsmParser/HexagonAsmParser.cpp

@@ -1348,7 +1348,6 @@ int HexagonAsmParser::processInstruction(MCInst &Inst,
   MCContext &Context = getParser().getContext();
   const MCRegisterInfo *RI = getContext().getRegisterInfo();
   const std::string r = "r";
-  const std::string v = "v";
   const std::string Colon = ":";
   using RegPairVals = std::pair<unsigned, unsigned>;
   auto GetRegPair = [this, r](RegPairVals RegPair) {

llvm/lib/Target/Hexagon/HexagonVectorLoopCarriedReuse.cpp

@@ -519,7 +519,6 @@ void HexagonVectorLoopCarriedReuse::reuseValue() {
   SmallVector<Instruction *, 4> InstsInPreheader;
   for (int i = 0; i < Iterations; ++i) {
     Instruction *InstInPreheader = Inst2Replace->clone();
-    SmallVector<Value *, 4> Ops;
     for (int j = 0; j < NumOperands; ++j) {
       Instruction *I = dyn_cast<Instruction>(Inst2Replace->getOperand(j));
       if (!I)

llvm/lib/Target/Mips/MipsCallLowering.cpp

@@ -334,7 +334,6 @@ bool MipsCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,
     splitToValueTypes(ArgRetInfo, RetInfos, DL, F.getCallingConv());
 
     SmallVector<CCValAssign, 16> ArgLocs;
-    SmallVector<ISD::OutputArg, 8> Outs;
 
     MipsCCState CCInfo(F.getCallingConv(), F.isVarArg(), MF, ArgLocs,
                        F.getContext());
@@ -383,8 +382,6 @@ bool MipsCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder,
     ++i;
   }
 
-  SmallVector<ISD::InputArg, 8> Ins;
-
   SmallVector<CCValAssign, 16> ArgLocs;
   MipsCCState CCInfo(F.getCallingConv(), F.isVarArg(), MF, ArgLocs,
                      F.getContext());
@@ -554,7 +551,6 @@ bool MipsCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
                                     F.getCallingConv());
 
     const std::string FuncName = F.getName().str();
-    SmallVector<ISD::InputArg, 8> Ins;
     SmallVector<CCValAssign, 8> ArgLocs;
     MipsIncomingValueAssigner Assigner(TLI.CCAssignFnForReturn(),
                                        FuncName.c_str(),

llvm/lib/Target/RISCV/GISel/RISCVCallLowering.cpp

@@ -552,7 +552,6 @@ bool RISCVCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder,
   if (!FLI.CanLowerReturn)
     insertSRetIncomingArgument(F, SplitArgInfos, FLI.DemoteRegister, MRI, DL);
 
-  SmallVector<Type *, 4> TypeList;
   unsigned Index = 0;
   for (auto &Arg : F.args()) {
     // Construct the ArgInfo object from destination register and argument type.
@@ -608,7 +607,6 @@ bool RISCVCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
       MIRBuilder.buildInstr(RISCV::ADJCALLSTACKDOWN);
 
   SmallVector<ArgInfo, 32> SplitArgInfos;
-  SmallVector<ISD::OutputArg, 8> Outs;
   for (auto &AInfo : Info.OrigArgs) {
     // Handle any required unmerging of split value types from a given VReg into
     // physical registers. ArgInfo objects are constructed correspondingly and

llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp

@@ -1707,7 +1707,6 @@ void WebAssemblyLowerEmscriptenEHSjLj::handleLongjmpableCallsForWasmSjLj(
     // BB. If the call is enclosed in another catchpad/cleanuppad scope, unwind
     // to its parent pad's unwind destination instead to preserve the scope
     // structure. It will eventually unwind to the catch.dispatch.longjmp.
-    SmallVector<OperandBundleDef, 1> Bundles;
     BasicBlock *UnwindDest = nullptr;
     if (auto Bundle = CI->getOperandBundle(LLVMContext::OB_funclet)) {
       Instruction *FromPad = cast<Instruction>(Bundle->Inputs[0]);

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -21121,7 +21121,6 @@ static SDValue LowerTruncateVecPackWithSignBits(
   // If the upper half of the source is undef, then attempt to split and
   // only truncate the lower half.
   if (DstVT.getSizeInBits() >= 128) {
-    SmallVector<SDValue> LowerOps;
     if (SDValue Lo = isUpperSubvectorUndef(In, DL, DAG)) {
       MVT DstHalfVT = DstVT.getHalfNumVectorElementsVT();
       if (SDValue Res = LowerTruncateVecPackWithSignBits(DstHalfVT, Lo, DL,
@@ -21164,7 +21163,6 @@ static SDValue LowerTruncateVecPack(MVT DstVT, SDValue In, const SDLoc &DL,
   // If the upper half of the source is undef, then attempt to split and
   // only truncate the lower half.
   if (DstVT.getSizeInBits() >= 128) {
-    SmallVector<SDValue> LowerOps;
     if (SDValue Lo = isUpperSubvectorUndef(In, DL, DAG)) {
       MVT DstHalfVT = DstVT.getHalfNumVectorElementsVT();
       if (SDValue Res = LowerTruncateVecPack(DstHalfVT, Lo, DL, Subtarget, DAG))

llvm/lib/Target/X86/X86LoadValueInjectionLoadHardening.cpp

@@ -414,7 +414,6 @@ X86LoadValueInjectionLoadHardeningPass::getGadgetGraph(
 
             // Check whether the use propagates to more defs.
             NodeAddr<InstrNode *> Owner{Use.Addr->getOwner(DFG)};
-            rdf::NodeList AnalyzedChildDefs;
             for (const auto &ChildDef :
                  Owner.Addr->members_if(DataFlowGraph::IsDef, DFG)) {
               if (!DefsVisited.insert(ChildDef.Id).second)

llvm/lib/Target/X86/X86LowerAMXType.cpp

@@ -1198,7 +1198,6 @@ bool X86LowerAMXCast::combineLdSt(SmallVectorImpl<Instruction *> &Casts) {
       for (auto *Store : DeadStores)
         Store->eraseFromParent();
     } else { // x86_cast_vector_to_tile
-      SmallVector<Instruction *, 2> DeadLoads;
       auto *Load = dyn_cast<LoadInst>(Cast->getOperand(0));
       if (!Load || !Load->hasOneUse())
         continue;