Remove a whole lot of unused variables

There are about 30 removed in this patch, generated by a new FixIt I haven't
got round to submitting yet.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@195814 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CGObjC.cpp

@@ -1356,7 +1356,6 @@ void CodeGenFunction::GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP,
     // Suppress the final autorelease in ARC.
     AutoreleaseResult = false;
 
-    SmallVector<CXXCtorInitializer *, 8> IvarInitializers;
     for (ObjCImplementationDecl::init_const_iterator B = IMP->init_begin(),
            E = IMP->init_end(); B != E; ++B) {
       CXXCtorInitializer *IvarInit = (*B);

lib/Driver/Compilation.cpp

@@ -70,8 +70,6 @@ const DerivedArgList &Compilation::getArgsForToolChain(const ToolChain *TC,
 }
 
 bool Compilation::CleanupFile(const char *File, bool IssueErrors) const {
-  std::string P(File);
-
   // FIXME: Why are we trying to remove files that we have not created? For
   // example we should only try to remove a temporary assembly file if
   // "clang -cc1" succeed in writing it. Was this a workaround for when

lib/Driver/Driver.cpp

@@ -1177,7 +1177,7 @@ void Driver::BuildActions(const ToolChain &TC, DerivedArgList &Args,
 
   // Construct the actions to perform.
   ActionList LinkerInputs;
-  ActionList SplitInputs;
+
   llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PL;
   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
     types::ID InputType = Inputs[i].first;

lib/Frontend/CompilerInvocation.cpp

@@ -1763,7 +1763,6 @@ std::string CompilerInvocation::getModuleHash() const {
   const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
   code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
 
-  std::vector<StringRef> MacroDefs;
   for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator 
             I = getPreprocessorOpts().Macros.begin(),
          IEnd = getPreprocessorOpts().Macros.end();

lib/Frontend/FrontendAction.cpp

@@ -180,7 +180,7 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
            "This action does not have AST file support!");
 
     IntrusiveRefCntPtr<DiagnosticsEngine> Diags(&CI.getDiagnostics());
-    std::string Error;
+
     ASTUnit *AST = ASTUnit::LoadFromASTFile(InputFile, Diags,
                                             CI.getFileSystemOpts());
     if (!AST)

lib/FrontendTool/ExecuteCompilerInvocation.cpp

@@ -32,7 +32,6 @@ using namespace llvm::opt;
 
 static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) {
   using namespace clang::frontend;
-  StringRef Action("unknown");
 
   switch (CI.getFrontendOpts().ProgramAction) {
   case ASTDeclList:            return new ASTDeclListAction();

lib/Parse/ParseDecl.cpp

@@ -5561,7 +5561,6 @@ void Parser::ParseBracketDeclarator(Declarator &D) {
     MaybeParseCXX11Attributes(attrs);
 
     // Remember that we parsed the empty array type.
-    ExprResult NumElements;
     D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, 0,
                                             T.getOpenLocation(),
                                             T.getCloseLocation()),

lib/Sema/SemaExpr.cpp

@@ -5984,7 +5984,6 @@ checkPointerTypesForAssignment(Sema &S, QualType LHSType, QualType RHSType) {
   // C99 6.5.16.1p1: This following citation is common to constraints
   // 3 & 4 (below). ...and the type *pointed to* by the left has all the
   // qualifiers of the type *pointed to* by the right;
-  Qualifiers lq;
 
   // As a special case, 'non-__weak A *' -> 'non-__weak const *' is okay.
   if (lhq.getObjCLifetime() != rhq.getObjCLifetime() &&

lib/Sema/SemaExprCXX.cpp

@@ -1225,9 +1225,8 @@ Sema::BuildCXXNew(SourceRange Range, bool UseGlobal,
   if (ArraySize && !ArraySize->isTypeDependent()) {
     ExprResult ConvertedSize;
     if (getLangOpts().CPlusPlus1y) {
-      unsigned IntWidth = Context.getTargetInfo().getIntWidth();
-      assert(IntWidth && "Builtin type of size 0?");
-      llvm::APSInt Value(IntWidth);
+      assert(Context.getTargetInfo().getIntWidth() && "Builtin type of size 0?");
+
       ConvertedSize = PerformImplicitConversion(ArraySize, Context.getSizeType(),
 						AA_Converting);
 
@@ -4457,7 +4456,6 @@ QualType Sema::CXXCheckConditionalOperands(ExprResult &Cond, ExprResult &LHS,
   //   those operands to the type of the other.
   if (!Context.hasSameType(LTy, RTy) &&
       (LTy->isRecordType() || RTy->isRecordType())) {
-    ImplicitConversionSequence ICSLeftToRight, ICSRightToLeft;
     // These return true if a single direction is already ambiguous.
     QualType L2RType, R2LType;
     bool HaveL2R, HaveR2L;

lib/Sema/SemaPseudoObject.cpp

@@ -1011,8 +1011,6 @@ Sema::ObjCSubscriptKind
   
   // Look for a conversion to an integral, enumeration type, or
   // objective-C pointer type.
-  UnresolvedSet<4> ViableConversions;
-  UnresolvedSet<4> ExplicitConversions;
   std::pair<CXXRecordDecl::conversion_iterator,
             CXXRecordDecl::conversion_iterator> Conversions
     = cast<CXXRecordDecl>(RecordTy->getDecl())->getVisibleConversionFunctions();

lib/Sema/SemaStmt.cpp

@@ -499,7 +499,6 @@ void Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val,
     // We don't diagnose this overflow, because it is implementation-defined
     // behavior.
     // FIXME: Introduce a second, default-ignored warning for this case?
-    llvm::APSInt OldVal(Val);
     Val.setIsSigned(NewSign);
   }
 }
@@ -1044,7 +1043,6 @@ Sema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, Stmt *Switch,
 
       for (EI = EnumVals.begin(); EI != EIend; EI++){
         // Drop unneeded case values
-        llvm::APSInt CIVal;
         while (CI != CaseVals.end() && CI->first < EI->first)
           CI++;
 

lib/Sema/SemaTemplate.cpp

@@ -2652,11 +2652,6 @@ Sema::CheckVarTemplateId(VarTemplateDecl *Template, SourceLocation TemplateLoc,
       }
     }
 
-    // If we're dealing with a member template where the template parameters
-    // have been instantiated, this provides the original template parameters
-    // from which the member template's parameters were instantiated.
-    SmallVector<const NamedDecl *, 4> InstantiatedTemplateParameters;
-
     if (Matched.size() >= 1) {
       SmallVector<MatchResult, 4>::iterator Best = Matched.begin();
       if (Matched.size() == 1) {

lib/Sema/SemaTemplateInstantiate.cpp

@@ -2352,8 +2352,7 @@ bool Sema::InstantiateClassTemplateSpecialization(
   // If we're dealing with a member template where the template parameters
   // have been instantiated, this provides the original template parameters
   // from which the member template's parameters were instantiated.
-  SmallVector<const NamedDecl *, 4> InstantiatedTemplateParameters;
-  
+
   if (Matched.size() >= 1) {
     SmallVectorImpl<MatchResult>::iterator Best = Matched.begin();
     if (Matched.size() == 1) {

lib/Sema/SemaType.cpp

@@ -2625,7 +2625,6 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
       }
       T = S.BuildReferenceType(T, DeclType.Ref.LValueRef, DeclType.Loc, Name);
 
-      Qualifiers Quals;
       if (DeclType.Ref.HasRestrict)
         T = S.BuildQualifiedType(T, DeclType.Loc, Qualifiers::Restrict);
       break;

lib/Serialization/ASTWriter.cpp

@@ -1040,7 +1040,6 @@ void ASTWriter::WriteControlBlock(Preprocessor &PP, ASTContext &Context,
   // Imports
   if (Chain) {
     serialization::ModuleManager &Mgr = Chain->getModuleManager();
-    SmallVector<char, 128> ModulePaths;
     Record.clear();
 
     for (ModuleManager::ModuleIterator M = Mgr.begin(), MEnd = Mgr.end();

lib/StaticAnalyzer/Checkers/BasicObjCFoundationChecks.cpp

@@ -733,8 +733,7 @@ void VariadicMethodTypeChecker::checkPreObjCMessage(const ObjCMethodCall &msg,
 
   // Verify that all arguments have Objective-C types.
   Optional<ExplodedNode*> errorNode;
-  ProgramStateRef state = C.getState();
-  
+
   for (unsigned I = variadicArgsBegin; I != variadicArgsEnd; ++I) {
     QualType ArgTy = msg.getArgExpr(I)->getType();
     if (ArgTy->isObjCObjectPointerType())

lib/StaticAnalyzer/Checkers/NoReturnFunctionChecker.cpp

@@ -37,7 +37,6 @@ public:
 
 void NoReturnFunctionChecker::checkPostCall(const CallEvent &CE,
                                             CheckerContext &C) const {
-  ProgramStateRef state = C.getState();
   bool BuildSinks = false;
 
   if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(CE.getDecl()))

lib/StaticAnalyzer/Core/ExprEngine.cpp

@@ -598,7 +598,6 @@ void ExprEngine::ProcessDeleteDtor(const CFGDeleteDtor Dtor,
 void ExprEngine::ProcessBaseDtor(const CFGBaseDtor D,
                                  ExplodedNode *Pred, ExplodedNodeSet &Dst) {
   const LocationContext *LCtx = Pred->getLocationContext();
-  ProgramStateRef State = Pred->getState();
 
   const CXXDestructorDecl *CurDtor = cast<CXXDestructorDecl>(LCtx->getDecl());
   Loc ThisPtr = getSValBuilder().getCXXThis(CurDtor,

lib/StaticAnalyzer/Core/ProgramState.cpp

@@ -175,7 +175,6 @@ ProgramState::invalidateRegionsImpl(ValueList Values,
                                     const CallEvent *Call) const {
   ProgramStateManager &Mgr = getStateManager();
   SubEngine* Eng = Mgr.getOwningEngine();
-  InvalidatedSymbols ConstIS;
 
   InvalidatedSymbols Invalidated;
   if (!IS)

lib/Tooling/JSONCompilationDatabase.cpp

@@ -174,7 +174,7 @@ std::vector<CompileCommand>
 JSONCompilationDatabase::getCompileCommands(StringRef FilePath) const {
   SmallString<128> NativeFilePath;
   llvm::sys::path::native(FilePath, NativeFilePath);
-  std::vector<StringRef> PossibleMatches;
+
   std::string Error;
   llvm::raw_string_ostream ES(Error);
   StringRef Match = MatchTrie.findEquivalent(NativeFilePath.str(), ES);

tools/libclang/IndexingContext.cpp

@@ -268,7 +268,6 @@ void IndexingContext::importedModule(const ImportDecl *ImportD) {
   Module *Mod = ImportD->getImportedModule();
   if (!Mod)
     return;
-  std::string ModuleName = Mod->getFullModuleName();
 
   CXIdxImportedASTFileInfo Info = {
                                     static_cast<CXFile>(

utils/TableGen/NeonEmitter.cpp

@@ -1172,7 +1172,6 @@ static void GenerateRegisterCheckPattern(const std::string &Name,
   RegisterSuffix = "";
 
   const StringRef NameRef(Name);
-  const StringRef ProtoRef(Proto);
 
   if ((NameRef.count("vdup") || NameRef.count("vmov")) && HasNPostfix) {
     return;
@@ -2895,7 +2894,6 @@ NeonEmitter::genOverloadTypeCheckCode(raw_ostream &OS,
                                       StringMap<ClassKind> &A64IntrinsicMap,
                                       bool isA64TypeCheck) {
   std::vector<Record *> RV = Records.getAllDerivedDefinitions("Inst");
-  StringMap<OpKind> EmittedMap;
 
   // Generate the overloaded type checking code for SemaChecking.cpp
   if (isA64TypeCheck)