[clang] Remove unused local variables (NFC) (#138453)

Author: kazutakahirata

clang/lib/CodeGen/CGBuiltin.cpp

@@ -1949,7 +1949,6 @@ RValue CodeGenFunction::emitBuiltinOSLogFormat(const CallExpr &E) {
   analyze_os_log::OSLogBufferLayout Layout;
   analyze_os_log::computeOSLogBufferLayout(Ctx, &E, Layout);
   Address BufAddr = EmitPointerWithAlignment(E.getArg(0));
-  llvm::SmallVector<llvm::Value *, 4> RetainableOperands;
 
   // Ignore argument 1, the format string. It is not currently used.
   CallArgList Args;

clang/lib/CodeGen/CGCUDANV.cpp

@@ -1194,7 +1194,6 @@ void CGNVCUDARuntime::transformManagedVars() {
 // registered. The linker will provide a pointer to this section so we can
 // register the symbols with the linked device image.
 void CGNVCUDARuntime::createOffloadingEntries() {
-  SmallVector<char, 32> Out;
   llvm::object::OffloadKind Kind = CGM.getLangOpts().HIP
                                        ? llvm::object::OffloadKind::OFK_HIP
                                        : llvm::object::OffloadKind::OFK_Cuda;

clang/lib/CodeGen/CGDeclCXX.cpp

@@ -748,7 +748,6 @@ void CodeGenModule::EmitCXXModuleInitFunc(Module *Primary) {
   // Add any initializers with specified priority; this uses the same  approach
   // as EmitCXXGlobalInitFunc().
   if (!PrioritizedCXXGlobalInits.empty()) {
-    SmallVector<llvm::Function *, 8> LocalCXXGlobalInits;
     llvm::array_pod_sort(PrioritizedCXXGlobalInits.begin(),
                          PrioritizedCXXGlobalInits.end());
     for (SmallVectorImpl<GlobalInitData>::iterator

clang/lib/CodeGen/CGExpr.cpp

@@ -3955,8 +3955,6 @@ void CodeGenFunction::EmitCfiCheckFail() {
       {CFITCK_UnrelatedCast, SanitizerKind::SO_CFIUnrelatedCast},
       {CFITCK_ICall, SanitizerKind::SO_CFIICall}};
 
-  SmallVector<std::pair<llvm::Value *, SanitizerKind::SanitizerOrdinal>, 5>
-      Checks;
   for (auto CheckKindOrdinalPair : CheckKinds) {
     int Kind = CheckKindOrdinalPair.first;
     SanitizerKind::SanitizerOrdinal Ordinal = CheckKindOrdinalPair.second;

clang/lib/CodeGen/CGExprAgg.cpp

@@ -1814,7 +1814,6 @@ void AggExprEmitter::VisitCXXParenListOrInitListExpr(
 
   // We'll need to enter cleanup scopes in case any of the element
   // initializers throws an exception.
-  SmallVector<EHScopeStack::stable_iterator, 16> cleanups;
   CodeGenFunction::CleanupDeactivationScope DeactivateCleanups(CGF);
 
   unsigned curInitIndex = 0;

clang/lib/CodeGen/CGHLSLRuntime.cpp

@@ -446,7 +446,6 @@ static void gatherFunctions(SmallVectorImpl<Function *> &Fns, llvm::Module &M,
   // HLSL neither supports priorities or COMDat values, so we will check those
   // in an assert but not handle them.
 
-  llvm::SmallVector<Function *> CtorFns;
   for (const auto &Ctor : CA->operands()) {
     if (isa<ConstantAggregateZero>(Ctor))
       continue;

clang/lib/CodeGen/CGObjCGNU.cpp

@@ -3827,8 +3827,6 @@ void CGObjCGNU::GenerateClass(const ObjCImplementationDecl *OID) {
   } else {
     SuperClass = llvm::ConstantPointerNull::get(PtrToInt8Ty);
   }
-  // Empty vector used to construct empty method lists
-  SmallVector<llvm::Constant*, 1>  empty;
   // Generate the method and instance variable lists
   llvm::Constant *MethodList = GenerateMethodList(ClassName, "",
       InstanceMethods, false);

clang/lib/CodeGen/CGStmtOpenMP.cpp

@@ -3495,7 +3495,6 @@ bool CodeGenFunction::EmitOMPWorksharingLoop(
         Ordered = true;
     }
 
-    llvm::DenseSet<const Expr *> EmittedFinals;
     emitAlignedClause(*this, S);
     bool HasLinears = EmitOMPLinearClauseInit(S);
     // Emit helper vars inits.

clang/lib/Driver/ToolChains/CommonArgs.cpp

@@ -2533,7 +2533,6 @@ static void GetSDLFromOffloadArchive(
 
   C.addTempFile(C.getArgs().MakeArgString(OutputLib));
 
-  ArgStringList CmdArgs;
   SmallString<128> DeviceTriple;
   DeviceTriple += Action::GetOffloadKindName(JA.getOffloadingDeviceKind());
   DeviceTriple += '-';

clang/lib/Driver/ToolChains/HLSL.cpp

@@ -287,7 +287,6 @@ HLSLToolChain::TranslateArgs(const DerivedArgList &Args, StringRef BoundArch,
   for (Arg *A : Args) {
     if (A->getOption().getID() == options::OPT_dxil_validator_version) {
       StringRef ValVerStr = A->getValue();
-      std::string ErrorMsg;
       if (!isLegalValidatorVersion(ValVerStr, getDriver()))
         continue;
     }

clang/lib/Driver/ToolChains/OHOS.cpp

@@ -303,7 +303,6 @@ ToolChain::path_list OHOS::getRuntimePaths() const {
 
   // Third try the effective triple.
   P.assign(D.ResourceDir);
-  std::string SysRoot = computeSysRoot();
   llvm::sys::path::append(P, "lib", getMultiarchTriple(Triple),
                           SelectedMultilib.gccSuffix());
   Paths.push_back(P.c_str());

clang/lib/Frontend/InitPreprocessor.cpp

@@ -974,7 +974,6 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
 
     if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) {
       auto version = LangOpts.ObjCRuntime.getVersion();
-      std::string versionString = "1";
       // Don't rely on the tuple argument, because we can be asked to target
       // later ABIs than we actually support, so clamp these values to those
       // currently supported

clang/lib/Lex/PPDirectives.cpp

@@ -3659,7 +3659,6 @@ void Preprocessor::HandleElifFamilyDirective(Token &ElifToken,
 std::optional<LexEmbedParametersResult>
 Preprocessor::LexEmbedParameters(Token &CurTok, bool ForHasEmbed) {
   LexEmbedParametersResult Result{};
-  SmallVector<Token, 2> ParameterTokens;
   tok::TokenKind EndTokenKind = ForHasEmbed ? tok::r_paren : tok::eod;
 
   auto DiagMismatchedBracesAndSkipToEOD =

clang/lib/Parse/ParsePragma.cpp

@@ -3455,7 +3455,6 @@ void PragmaSTDC_FENV_ROUNDHandler::HandlePragma(Preprocessor &PP,
                                                 PragmaIntroducer Introducer,
                                                 Token &Tok) {
   Token PragmaName = Tok;
-  SmallVector<Token, 1> TokenList;
   if (!PP.getTargetInfo().hasStrictFP() && !PP.getLangOpts().ExpStrictFP) {
     PP.Diag(Tok.getLocation(), diag::warn_pragma_fp_ignored)
         << PragmaName.getIdentifierInfo()->getName();

clang/lib/Sema/SemaCodeComplete.cpp

@@ -4837,7 +4837,6 @@ void SemaCodeCompletion::CodeCompleteAttribute(
       // We skip this if the scope was already spelled and not guarded, or
       // we must spell it and can't guard it.
       if (!(InScope && !InScopeUnderscore) && SyntaxSupportsGuards) {
-        llvm::SmallString<32> Guarded;
         if (Scope.empty()) {
           Add(Scope, Name, /*Underscores=*/true);
         } else {

clang/lib/Sema/SemaDeclAttr.cpp

@@ -851,7 +851,6 @@ static void handleDiagnoseIfAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
   }
 
   StringRef WarningGroup;
-  SmallVector<StringRef, 2> Options;
   if (AL.getNumArgs() > 3) {
     if (!S.checkStringLiteralArgumentAttr(AL, 3, WarningGroup))
       return;

clang/lib/Sema/SemaDeclObjC.cpp

@@ -3589,7 +3589,6 @@ ObjCMethodDecl *SemaObjC::LookupMethodInGlobalPool(Selector Sel, SourceRange R,
 
   // Gather the non-hidden methods.
   ObjCMethodList &MethList = instance ? Pos->second.first : Pos->second.second;
-  SmallVector<ObjCMethodDecl *, 4> Methods;
   for (ObjCMethodList *M = &MethList; M; M = M->getNext()) {
     if (M->getMethod() && M->getMethod()->isUnconditionallyVisible())
       return M->getMethod();

clang/lib/Sema/SemaInit.cpp

@@ -5842,7 +5842,6 @@ static void TryOrBuildParenListInitialization(
 
   if (const ArrayType *AT =
           S.getASTContext().getAsArrayType(Entity.getType())) {
-    SmallVector<InitializedEntity, 4> ElementEntities;
     uint64_t ArrayLength;
     // C++ [dcl.init]p16.5
     //   if the destination type is an array, the object is initialized as

clang/lib/Sema/SemaOpenMP.cpp

@@ -5777,7 +5777,6 @@ processImplicitMapsWithDefaultMappers(Sema &S, DSAStackTy *Stack,
   // Check for the default mapper for data members.
   if (S.getLangOpts().OpenMP < 50)
     return;
-  SmallVector<OMPClause *, 4> ImplicitMaps;
   for (int Cnt = 0, EndCnt = Clauses.size(); Cnt < EndCnt; ++Cnt) {
     auto *C = dyn_cast<OMPMapClause>(Clauses[Cnt]);
     if (!C)
@@ -14901,8 +14900,6 @@ StmtResult SemaOpenMP::ActOnOpenMPUnrollDirective(ArrayRef<OMPClause *> Clauses,
   std::string OrigVarName = OrigVar->getNameInfo().getAsString();
   std::string OuterIVName = (Twine(".unrolled.iv.") + OrigVarName).str();
   std::string InnerIVName = (Twine(".unroll_inner.iv.") + OrigVarName).str();
-  std::string InnerTripCountName =
-      (Twine(".unroll_inner.tripcount.") + OrigVarName).str();
 
   // Create the iteration variable for the unrolled loop.
   VarDecl *OuterIVDecl =
@@ -15317,9 +15314,7 @@ StmtResult SemaOpenMP::ActOnOpenMPInterchangeDirective(
 
     assert(LoopHelper.Counters.size() == 1 &&
            "Single-dimensional loop iteration space expected");
-    auto *OrigCntVar = cast<DeclRefExpr>(LoopHelper.Counters.front());
 
-    std::string OrigVarName = OrigCntVar->getNameInfo().getAsString();
     addLoopPreInits(Context, LoopHelper, LoopStmts[I], OriginalInits[I],
                     PreInits);
   }

clang/lib/Serialization/ASTReader.cpp

@@ -10188,8 +10188,6 @@ void ASTReader::ReadComments() {
       }
     }
   NextCursor:
-    llvm::DenseMap<FileID, std::map<unsigned, RawComment *>>
-        FileToOffsetToComment;
     for (RawComment *C : Comments) {
       SourceLocation CommentLoc = C->getBeginLoc();
       if (CommentLoc.isValid()) {

clang/lib/Serialization/ASTWriter.cpp

@@ -5599,7 +5599,6 @@ void ASTWriter::PrepareWritingSpecialDecls(Sema &SemaRef) {
   // Writing all of the tentative definitions in this file, in
   // TentativeDefinitions order.  Generally, this record will be empty for
   // headers.
-  RecordData TentativeDefinitions;
   AddLazyVectorDecls(*this, SemaRef.TentativeDefinitions);
 
   // Writing all of the file scoped decls in this file.

clang/lib/StaticAnalyzer/Checkers/GenericTaintChecker.cpp

@@ -154,7 +154,6 @@ const NoteTag *taintOriginTrackerTag(CheckerContext &C,
   return C.getNoteTag([TaintedSymbols = std::move(TaintedSymbols),
                        TaintedArgs = std::move(TaintedArgs), CallLocation](
                           PathSensitiveBugReport &BR) -> std::string {
-    SmallString<256> Msg;
     // We give diagnostics only for taint related reports
     if (!BR.isInteresting(CallLocation) ||
         BR.getBugType().getCategory() != categories::TaintedData) {

clang/lib/StaticAnalyzer/Checkers/LocalizationChecker.cpp

@@ -972,7 +972,6 @@ void NonLocalizedStringChecker::checkPostObjCMessage(const ObjCMethodCall &msg,
   const IdentifierInfo *odInfo = OD->getIdentifier();
 
   Selector S = msg.getSelector();
-  std::string SelectorName = S.getAsString();
 
   std::pair<const IdentifierInfo *, Selector> MethodDescription = {odInfo, S};
 

clang/lib/Tooling/DependencyScanning/ModuleDepCollector.cpp

@@ -577,7 +577,6 @@ static std::string getModuleContextHash(const ModuleDeps &MD,
                                         llvm::vfs::FileSystem &VFS) {
   llvm::HashBuilder<llvm::TruncatedBLAKE3<16>, llvm::endianness::native>
       HashBuilder;
-  SmallString<32> Scratch;
 
   // Hash the compiler version and serialization version to ensure the module
   // will be readable.

clang/tools/libclang/CIndex.cpp

@@ -4689,7 +4689,6 @@ static const ExprEvalResult *evaluateExpr(Expr *expr, CXCursor C) {
   if (ER.Val.isFloat()) {
     llvm::SmallVector<char, 100> Buffer;
     ER.Val.getFloat().toString(Buffer);
-    std::string floatStr(Buffer.data(), Buffer.size());
     result->EvalType = CXEval_Float;
     bool ignored;
     llvm::APFloat apFloat = ER.Val.getFloat();

clang/unittests/StaticAnalyzer/CallDescriptionTest.cpp

@@ -361,15 +361,8 @@ TEST(CallDescription, AliasNames) {
       std::cont v;
       v.data();
     })code";
-  constexpr StringRef UseStructNameInSpelling = R"code(
-    void foo() {
-      std::container v;
-      v.data();
-    })code";
   const std::string UseAliasInSpellingCode =
       (Twine{AliasNamesCode} + UseAliasInSpelling).str();
-  const std::string UseStructNameInSpellingCode =
-      (Twine{AliasNamesCode} + UseStructNameInSpelling).str();
 
   // Test if the code spells the alias, wile we match against the struct name,
   // and again matching against the alias.

clang/utils/TableGen/ClangAttrEmitter.cpp

@@ -4638,7 +4638,6 @@ static void GenerateSpellingIndexToSemanticSpelling(const Record &Attr,
   // Generate the enumeration we will use for the mapping.
   SemanticSpellingMap SemanticToSyntacticMap;
   std::string Enum = CreateSemanticSpellings(Spellings, SemanticToSyntacticMap);
-  std::string Name = Attr.getName().str() + "AttrSpellingMap";
 
   OS << "unsigned spellingIndexToSemanticSpelling(";
   OS << "const ParsedAttr &Attr) const override {\n";