forked from OSchip/llvm-project
724 lines
26 KiB
C++
724 lines
26 KiB
C++
//===--- Sema.cpp - AST Builder and Semantic Analysis Implementation ------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the actions class which performs semantic analysis and
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// builds an AST out of a parse stream.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Sema/SemaInternal.h"
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#include "clang/Sema/DelayedDiagnostic.h"
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#include "TargetAttributesSema.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SmallSet.h"
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#include "llvm/ADT/APFloat.h"
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#include "clang/Sema/CXXFieldCollector.h"
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#include "clang/Sema/TemplateDeduction.h"
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#include "clang/Sema/ExternalSemaSource.h"
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#include "clang/Sema/ObjCMethodList.h"
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#include "clang/Sema/PrettyDeclStackTrace.h"
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#include "clang/Sema/Scope.h"
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#include "clang/Sema/ScopeInfo.h"
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#include "clang/Sema/SemaConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/ASTDiagnostic.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/Expr.h"
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#include "clang/AST/StmtCXX.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Basic/PartialDiagnostic.h"
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#include "clang/Basic/TargetInfo.h"
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using namespace clang;
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using namespace sema;
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FunctionScopeInfo::~FunctionScopeInfo() { }
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void FunctionScopeInfo::Clear() {
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HasBranchProtectedScope = false;
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HasBranchIntoScope = false;
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HasIndirectGoto = false;
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SwitchStack.clear();
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Returns.clear();
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ErrorTrap.reset();
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PossiblyUnreachableDiags.clear();
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}
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BlockScopeInfo::~BlockScopeInfo() { }
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void Sema::ActOnTranslationUnitScope(Scope *S) {
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TUScope = S;
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PushDeclContext(S, Context.getTranslationUnitDecl());
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VAListTagName = PP.getIdentifierInfo("__va_list_tag");
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if (!Context.isInt128Installed() && // May be set by ASTReader.
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PP.getTargetInfo().getPointerWidth(0) >= 64) {
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TypeSourceInfo *TInfo;
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// Install [u]int128_t for 64-bit targets.
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TInfo = Context.getTrivialTypeSourceInfo(Context.Int128Ty);
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PushOnScopeChains(TypedefDecl::Create(Context, CurContext,
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SourceLocation(),
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SourceLocation(),
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&Context.Idents.get("__int128_t"),
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TInfo), TUScope);
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TInfo = Context.getTrivialTypeSourceInfo(Context.UnsignedInt128Ty);
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PushOnScopeChains(TypedefDecl::Create(Context, CurContext,
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SourceLocation(),
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SourceLocation(),
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&Context.Idents.get("__uint128_t"),
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TInfo), TUScope);
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Context.setInt128Installed();
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}
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if (!PP.getLangOptions().ObjC1) return;
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// Built-in ObjC types may already be set by ASTReader (hence isNull checks).
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if (Context.getObjCSelType().isNull()) {
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// Create the built-in typedef for 'SEL'.
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QualType SelT = Context.getPointerType(Context.ObjCBuiltinSelTy);
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TypeSourceInfo *SelInfo = Context.getTrivialTypeSourceInfo(SelT);
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TypedefDecl *SelTypedef
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= TypedefDecl::Create(Context, CurContext,
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SourceLocation(), SourceLocation(),
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&Context.Idents.get("SEL"), SelInfo);
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PushOnScopeChains(SelTypedef, TUScope);
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Context.setObjCSelType(Context.getTypeDeclType(SelTypedef));
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Context.ObjCSelRedefinitionType = Context.getObjCSelType();
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}
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// Synthesize "@class Protocol;
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if (Context.getObjCProtoType().isNull()) {
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ObjCInterfaceDecl *ProtocolDecl =
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ObjCInterfaceDecl::Create(Context, CurContext, SourceLocation(),
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&Context.Idents.get("Protocol"),
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SourceLocation(), true);
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Context.setObjCProtoType(Context.getObjCInterfaceType(ProtocolDecl));
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PushOnScopeChains(ProtocolDecl, TUScope, false);
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}
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// Create the built-in typedef for 'id'.
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if (Context.getObjCIdType().isNull()) {
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QualType T = Context.getObjCObjectType(Context.ObjCBuiltinIdTy, 0, 0);
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T = Context.getObjCObjectPointerType(T);
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TypeSourceInfo *IdInfo = Context.getTrivialTypeSourceInfo(T);
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TypedefDecl *IdTypedef
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= TypedefDecl::Create(Context, CurContext,
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SourceLocation(), SourceLocation(),
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&Context.Idents.get("id"), IdInfo);
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PushOnScopeChains(IdTypedef, TUScope);
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Context.setObjCIdType(Context.getTypeDeclType(IdTypedef));
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Context.ObjCIdRedefinitionType = Context.getObjCIdType();
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}
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// Create the built-in typedef for 'Class'.
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if (Context.getObjCClassType().isNull()) {
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QualType T = Context.getObjCObjectType(Context.ObjCBuiltinClassTy, 0, 0);
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T = Context.getObjCObjectPointerType(T);
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TypeSourceInfo *ClassInfo = Context.getTrivialTypeSourceInfo(T);
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TypedefDecl *ClassTypedef
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= TypedefDecl::Create(Context, CurContext,
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SourceLocation(), SourceLocation(),
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&Context.Idents.get("Class"), ClassInfo);
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PushOnScopeChains(ClassTypedef, TUScope);
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Context.setObjCClassType(Context.getTypeDeclType(ClassTypedef));
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Context.ObjCClassRedefinitionType = Context.getObjCClassType();
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}
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}
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Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
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bool CompleteTranslationUnit,
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CodeCompleteConsumer *CodeCompleter)
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: TheTargetAttributesSema(0), FPFeatures(pp.getLangOptions()),
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LangOpts(pp.getLangOptions()), PP(pp), Context(ctxt), Consumer(consumer),
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Diags(PP.getDiagnostics()), SourceMgr(PP.getSourceManager()),
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ExternalSource(0), CodeCompleter(CodeCompleter), CurContext(0),
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PackContext(0), VisContext(0),
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IdResolver(pp.getLangOptions()), CXXTypeInfoDecl(0), MSVCGuidDecl(0),
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GlobalNewDeleteDeclared(false),
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CompleteTranslationUnit(CompleteTranslationUnit),
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NumSFINAEErrors(0), SuppressAccessChecking(false),
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AccessCheckingSFINAE(false), InNonInstantiationSFINAEContext(false),
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NonInstantiationEntries(0), ArgumentPackSubstitutionIndex(-1),
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CurrentInstantiationScope(0), TyposCorrected(0),
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AnalysisWarnings(*this)
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{
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TUScope = 0;
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if (getLangOptions().CPlusPlus)
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FieldCollector.reset(new CXXFieldCollector());
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// Tell diagnostics how to render things from the AST library.
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PP.getDiagnostics().SetArgToStringFn(&FormatASTNodeDiagnosticArgument,
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&Context);
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ExprEvalContexts.push_back(
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ExpressionEvaluationContextRecord(PotentiallyEvaluated, 0));
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FunctionScopes.push_back(new FunctionScopeInfo(Diags));
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}
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void Sema::Initialize() {
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// Tell the AST consumer about this Sema object.
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Consumer.Initialize(Context);
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// FIXME: Isn't this redundant with the initialization above?
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if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer))
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SC->InitializeSema(*this);
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// Tell the external Sema source about this Sema object.
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if (ExternalSemaSource *ExternalSema
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= dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource()))
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ExternalSema->InitializeSema(*this);
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}
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Sema::~Sema() {
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if (PackContext) FreePackedContext();
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if (VisContext) FreeVisContext();
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delete TheTargetAttributesSema;
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// Kill all the active scopes.
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for (unsigned I = 1, E = FunctionScopes.size(); I != E; ++I)
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delete FunctionScopes[I];
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if (FunctionScopes.size() == 1)
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delete FunctionScopes[0];
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// Tell the SemaConsumer to forget about us; we're going out of scope.
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if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer))
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SC->ForgetSema();
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// Detach from the external Sema source.
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if (ExternalSemaSource *ExternalSema
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= dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource()))
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ExternalSema->ForgetSema();
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}
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/// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit cast.
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/// If there is already an implicit cast, merge into the existing one.
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/// The result is of the given category.
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void Sema::ImpCastExprToType(Expr *&Expr, QualType Ty,
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CastKind Kind, ExprValueKind VK,
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const CXXCastPath *BasePath) {
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QualType ExprTy = Context.getCanonicalType(Expr->getType());
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QualType TypeTy = Context.getCanonicalType(Ty);
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if (ExprTy == TypeTy)
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return;
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// If this is a derived-to-base cast to a through a virtual base, we
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// need a vtable.
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if (Kind == CK_DerivedToBase &&
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BasePathInvolvesVirtualBase(*BasePath)) {
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QualType T = Expr->getType();
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if (const PointerType *Pointer = T->getAs<PointerType>())
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T = Pointer->getPointeeType();
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if (const RecordType *RecordTy = T->getAs<RecordType>())
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MarkVTableUsed(Expr->getLocStart(),
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cast<CXXRecordDecl>(RecordTy->getDecl()));
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}
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if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(Expr)) {
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if (ImpCast->getCastKind() == Kind && (!BasePath || BasePath->empty())) {
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ImpCast->setType(Ty);
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ImpCast->setValueKind(VK);
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return;
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}
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}
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Expr = ImplicitCastExpr::Create(Context, Ty, Kind, Expr, BasePath, VK);
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}
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ExprValueKind Sema::CastCategory(Expr *E) {
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Expr::Classification Classification = E->Classify(Context);
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return Classification.isRValue() ? VK_RValue :
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(Classification.isLValue() ? VK_LValue : VK_XValue);
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}
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/// \brief Used to prune the decls of Sema's UnusedFileScopedDecls vector.
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static bool ShouldRemoveFromUnused(Sema *SemaRef, const DeclaratorDecl *D) {
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if (D->isUsed())
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return true;
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if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
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// UnusedFileScopedDecls stores the first declaration.
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// The declaration may have become definition so check again.
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const FunctionDecl *DeclToCheck;
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if (FD->hasBody(DeclToCheck))
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return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
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// Later redecls may add new information resulting in not having to warn,
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// so check again.
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DeclToCheck = FD->getMostRecentDeclaration();
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if (DeclToCheck != FD)
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return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
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}
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if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
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// UnusedFileScopedDecls stores the first declaration.
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// The declaration may have become definition so check again.
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const VarDecl *DeclToCheck = VD->getDefinition();
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if (DeclToCheck)
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return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
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// Later redecls may add new information resulting in not having to warn,
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// so check again.
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DeclToCheck = VD->getMostRecentDeclaration();
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if (DeclToCheck != VD)
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return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
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}
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return false;
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}
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namespace {
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struct UndefinedInternal {
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NamedDecl *decl;
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FullSourceLoc useLoc;
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UndefinedInternal(NamedDecl *decl, FullSourceLoc useLoc)
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: decl(decl), useLoc(useLoc) {}
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};
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bool operator<(const UndefinedInternal &l, const UndefinedInternal &r) {
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return l.useLoc.isBeforeInTranslationUnitThan(r.useLoc);
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}
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}
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/// checkUndefinedInternals - Check for undefined objects with internal linkage.
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static void checkUndefinedInternals(Sema &S) {
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if (S.UndefinedInternals.empty()) return;
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// Collect all the still-undefined entities with internal linkage.
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llvm::SmallVector<UndefinedInternal, 16> undefined;
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for (llvm::DenseMap<NamedDecl*,SourceLocation>::iterator
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i = S.UndefinedInternals.begin(), e = S.UndefinedInternals.end();
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i != e; ++i) {
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NamedDecl *decl = i->first;
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// Ignore attributes that have become invalid.
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if (decl->isInvalidDecl()) continue;
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// __attribute__((weakref)) is basically a definition.
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if (decl->hasAttr<WeakRefAttr>()) continue;
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if (FunctionDecl *fn = dyn_cast<FunctionDecl>(decl)) {
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if (fn->isPure() || fn->hasBody())
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continue;
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} else {
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if (cast<VarDecl>(decl)->hasDefinition() != VarDecl::DeclarationOnly)
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continue;
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}
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// We build a FullSourceLoc so that we can sort with array_pod_sort.
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FullSourceLoc loc(i->second, S.Context.getSourceManager());
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undefined.push_back(UndefinedInternal(decl, loc));
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}
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if (undefined.empty()) return;
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// Sort (in order of use site) so that we're not (as) dependent on
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// the iteration order through an llvm::DenseMap.
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llvm::array_pod_sort(undefined.begin(), undefined.end());
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for (llvm::SmallVectorImpl<UndefinedInternal>::iterator
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i = undefined.begin(), e = undefined.end(); i != e; ++i) {
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NamedDecl *decl = i->decl;
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S.Diag(decl->getLocation(), diag::warn_undefined_internal)
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<< isa<VarDecl>(decl) << decl;
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S.Diag(i->useLoc, diag::note_used_here);
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}
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}
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/// ActOnEndOfTranslationUnit - This is called at the very end of the
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/// translation unit when EOF is reached and all but the top-level scope is
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/// popped.
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void Sema::ActOnEndOfTranslationUnit() {
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// At PCH writing, implicit instantiations and VTable handling info are
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// stored and performed when the PCH is included.
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if (CompleteTranslationUnit) {
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// If any dynamic classes have their key function defined within
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// this translation unit, then those vtables are considered "used" and must
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// be emitted.
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for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) {
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assert(!DynamicClasses[I]->isDependentType() &&
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"Should not see dependent types here!");
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if (const CXXMethodDecl *KeyFunction
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= Context.getKeyFunction(DynamicClasses[I])) {
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const FunctionDecl *Definition = 0;
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if (KeyFunction->hasBody(Definition))
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MarkVTableUsed(Definition->getLocation(), DynamicClasses[I], true);
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}
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}
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// If DefinedUsedVTables ends up marking any virtual member functions it
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// might lead to more pending template instantiations, which we then need
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// to instantiate.
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DefineUsedVTables();
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// C++: Perform implicit template instantiations.
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//
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// FIXME: When we perform these implicit instantiations, we do not
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// carefully keep track of the point of instantiation (C++ [temp.point]).
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// This means that name lookup that occurs within the template
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// instantiation will always happen at the end of the translation unit,
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// so it will find some names that should not be found. Although this is
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// common behavior for C++ compilers, it is technically wrong. In the
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// future, we either need to be able to filter the results of name lookup
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// or we need to perform template instantiations earlier.
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PerformPendingInstantiations();
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}
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// Remove file scoped decls that turned out to be used.
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UnusedFileScopedDecls.erase(std::remove_if(UnusedFileScopedDecls.begin(),
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UnusedFileScopedDecls.end(),
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std::bind1st(std::ptr_fun(ShouldRemoveFromUnused),
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this)),
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UnusedFileScopedDecls.end());
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if (!CompleteTranslationUnit) {
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TUScope = 0;
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return;
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}
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// Check for #pragma weak identifiers that were never declared
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// FIXME: This will cause diagnostics to be emitted in a non-determinstic
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// order! Iterating over a densemap like this is bad.
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for (llvm::DenseMap<IdentifierInfo*,WeakInfo>::iterator
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I = WeakUndeclaredIdentifiers.begin(),
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E = WeakUndeclaredIdentifiers.end(); I != E; ++I) {
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if (I->second.getUsed()) continue;
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Diag(I->second.getLocation(), diag::warn_weak_identifier_undeclared)
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<< I->first;
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}
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// C99 6.9.2p2:
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// A declaration of an identifier for an object that has file
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// scope without an initializer, and without a storage-class
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// specifier or with the storage-class specifier static,
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// constitutes a tentative definition. If a translation unit
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// contains one or more tentative definitions for an identifier,
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// and the translation unit contains no external definition for
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// that identifier, then the behavior is exactly as if the
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// translation unit contains a file scope declaration of that
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// identifier, with the composite type as of the end of the
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// translation unit, with an initializer equal to 0.
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llvm::SmallSet<VarDecl *, 32> Seen;
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for (unsigned i = 0, e = TentativeDefinitions.size(); i != e; ++i) {
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VarDecl *VD = TentativeDefinitions[i]->getActingDefinition();
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// If the tentative definition was completed, getActingDefinition() returns
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// null. If we've already seen this variable before, insert()'s second
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// return value is false.
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if (VD == 0 || VD->isInvalidDecl() || !Seen.insert(VD))
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continue;
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if (const IncompleteArrayType *ArrayT
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= Context.getAsIncompleteArrayType(VD->getType())) {
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if (RequireCompleteType(VD->getLocation(),
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ArrayT->getElementType(),
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diag::err_tentative_def_incomplete_type_arr)) {
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VD->setInvalidDecl();
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continue;
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}
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// Set the length of the array to 1 (C99 6.9.2p5).
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Diag(VD->getLocation(), diag::warn_tentative_incomplete_array);
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llvm::APInt One(Context.getTypeSize(Context.getSizeType()), true);
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QualType T = Context.getConstantArrayType(ArrayT->getElementType(),
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One, ArrayType::Normal, 0);
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VD->setType(T);
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} else if (RequireCompleteType(VD->getLocation(), VD->getType(),
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diag::err_tentative_def_incomplete_type))
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VD->setInvalidDecl();
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// Notify the consumer that we've completed a tentative definition.
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if (!VD->isInvalidDecl())
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Consumer.CompleteTentativeDefinition(VD);
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}
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// If there were errors, disable 'unused' warnings since they will mostly be
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// noise.
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if (!Diags.hasErrorOccurred()) {
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// Output warning for unused file scoped decls.
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for (llvm::SmallVectorImpl<const DeclaratorDecl*>::iterator
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I = UnusedFileScopedDecls.begin(),
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E = UnusedFileScopedDecls.end(); I != E; ++I) {
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if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) {
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const FunctionDecl *DiagD;
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if (!FD->hasBody(DiagD))
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DiagD = FD;
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if (DiagD->isDeleted())
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continue; // Deleted functions are supposed to be unused.
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Diag(DiagD->getLocation(),
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isa<CXXMethodDecl>(DiagD) ? diag::warn_unused_member_function
|
|
: diag::warn_unused_function)
|
|
<< DiagD->getDeclName();
|
|
} else {
|
|
const VarDecl *DiagD = cast<VarDecl>(*I)->getDefinition();
|
|
if (!DiagD)
|
|
DiagD = cast<VarDecl>(*I);
|
|
Diag(DiagD->getLocation(), diag::warn_unused_variable)
|
|
<< DiagD->getDeclName();
|
|
}
|
|
}
|
|
|
|
checkUndefinedInternals(*this);
|
|
}
|
|
|
|
// Check we've noticed that we're no longer parsing the initializer for every
|
|
// variable. If we miss cases, then at best we have a performance issue and
|
|
// at worst a rejects-valid bug.
|
|
assert(ParsingInitForAutoVars.empty() &&
|
|
"Didn't unmark var as having its initializer parsed");
|
|
|
|
TUScope = 0;
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Helper functions.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
DeclContext *Sema::getFunctionLevelDeclContext() {
|
|
DeclContext *DC = CurContext;
|
|
|
|
while (isa<BlockDecl>(DC) || isa<EnumDecl>(DC))
|
|
DC = DC->getParent();
|
|
|
|
return DC;
|
|
}
|
|
|
|
/// getCurFunctionDecl - If inside of a function body, this returns a pointer
|
|
/// to the function decl for the function being parsed. If we're currently
|
|
/// in a 'block', this returns the containing context.
|
|
FunctionDecl *Sema::getCurFunctionDecl() {
|
|
DeclContext *DC = getFunctionLevelDeclContext();
|
|
return dyn_cast<FunctionDecl>(DC);
|
|
}
|
|
|
|
ObjCMethodDecl *Sema::getCurMethodDecl() {
|
|
DeclContext *DC = getFunctionLevelDeclContext();
|
|
return dyn_cast<ObjCMethodDecl>(DC);
|
|
}
|
|
|
|
NamedDecl *Sema::getCurFunctionOrMethodDecl() {
|
|
DeclContext *DC = getFunctionLevelDeclContext();
|
|
if (isa<ObjCMethodDecl>(DC) || isa<FunctionDecl>(DC))
|
|
return cast<NamedDecl>(DC);
|
|
return 0;
|
|
}
|
|
|
|
Sema::SemaDiagnosticBuilder::~SemaDiagnosticBuilder() {
|
|
if (!isActive())
|
|
return;
|
|
|
|
if (llvm::Optional<TemplateDeductionInfo*> Info = SemaRef.isSFINAEContext()) {
|
|
switch (DiagnosticIDs::getDiagnosticSFINAEResponse(getDiagID())) {
|
|
case DiagnosticIDs::SFINAE_Report:
|
|
// Fall through; we'll report the diagnostic below.
|
|
break;
|
|
|
|
case DiagnosticIDs::SFINAE_AccessControl:
|
|
// Unless access checking is specifically called out as a SFINAE
|
|
// error, report this diagnostic.
|
|
if (!SemaRef.AccessCheckingSFINAE)
|
|
break;
|
|
|
|
case DiagnosticIDs::SFINAE_SubstitutionFailure:
|
|
// Count this failure so that we know that template argument deduction
|
|
// has failed.
|
|
++SemaRef.NumSFINAEErrors;
|
|
SemaRef.Diags.setLastDiagnosticIgnored();
|
|
SemaRef.Diags.Clear();
|
|
Clear();
|
|
return;
|
|
|
|
case DiagnosticIDs::SFINAE_Suppress:
|
|
// Make a copy of this suppressed diagnostic and store it with the
|
|
// template-deduction information;
|
|
FlushCounts();
|
|
DiagnosticInfo DiagInfo(&SemaRef.Diags);
|
|
|
|
if (*Info)
|
|
(*Info)->addSuppressedDiagnostic(DiagInfo.getLocation(),
|
|
PartialDiagnostic(DiagInfo,
|
|
SemaRef.Context.getDiagAllocator()));
|
|
|
|
// Suppress this diagnostic.
|
|
SemaRef.Diags.setLastDiagnosticIgnored();
|
|
SemaRef.Diags.Clear();
|
|
Clear();
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Emit the diagnostic.
|
|
if (!this->Emit())
|
|
return;
|
|
|
|
// If this is not a note, and we're in a template instantiation
|
|
// that is different from the last template instantiation where
|
|
// we emitted an error, print a template instantiation
|
|
// backtrace.
|
|
if (!DiagnosticIDs::isBuiltinNote(DiagID) &&
|
|
!SemaRef.ActiveTemplateInstantiations.empty() &&
|
|
SemaRef.ActiveTemplateInstantiations.back()
|
|
!= SemaRef.LastTemplateInstantiationErrorContext) {
|
|
SemaRef.PrintInstantiationStack();
|
|
SemaRef.LastTemplateInstantiationErrorContext
|
|
= SemaRef.ActiveTemplateInstantiations.back();
|
|
}
|
|
}
|
|
|
|
Sema::SemaDiagnosticBuilder Sema::Diag(SourceLocation Loc, unsigned DiagID) {
|
|
DiagnosticBuilder DB = Diags.Report(Loc, DiagID);
|
|
return SemaDiagnosticBuilder(DB, *this, DiagID);
|
|
}
|
|
|
|
Sema::SemaDiagnosticBuilder
|
|
Sema::Diag(SourceLocation Loc, const PartialDiagnostic& PD) {
|
|
SemaDiagnosticBuilder Builder(Diag(Loc, PD.getDiagID()));
|
|
PD.Emit(Builder);
|
|
|
|
return Builder;
|
|
}
|
|
|
|
/// \brief Looks through the macro-instantiation chain for the given
|
|
/// location, looking for a macro instantiation with the given name.
|
|
/// If one is found, returns true and sets the location to that
|
|
/// instantiation loc.
|
|
bool Sema::findMacroSpelling(SourceLocation &locref, llvm::StringRef name) {
|
|
SourceLocation loc = locref;
|
|
if (!loc.isMacroID()) return false;
|
|
|
|
// There's no good way right now to look at the intermediate
|
|
// instantiations, so just jump to the instantiation location.
|
|
loc = getSourceManager().getInstantiationLoc(loc);
|
|
|
|
// If that's written with the name, stop here.
|
|
llvm::SmallVector<char, 16> buffer;
|
|
if (getPreprocessor().getSpelling(loc, buffer) == name) {
|
|
locref = loc;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// \brief Determines the active Scope associated with the given declaration
|
|
/// context.
|
|
///
|
|
/// This routine maps a declaration context to the active Scope object that
|
|
/// represents that declaration context in the parser. It is typically used
|
|
/// from "scope-less" code (e.g., template instantiation, lazy creation of
|
|
/// declarations) that injects a name for name-lookup purposes and, therefore,
|
|
/// must update the Scope.
|
|
///
|
|
/// \returns The scope corresponding to the given declaraion context, or NULL
|
|
/// if no such scope is open.
|
|
Scope *Sema::getScopeForContext(DeclContext *Ctx) {
|
|
|
|
if (!Ctx)
|
|
return 0;
|
|
|
|
Ctx = Ctx->getPrimaryContext();
|
|
for (Scope *S = getCurScope(); S; S = S->getParent()) {
|
|
// Ignore scopes that cannot have declarations. This is important for
|
|
// out-of-line definitions of static class members.
|
|
if (S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope))
|
|
if (DeclContext *Entity = static_cast<DeclContext *> (S->getEntity()))
|
|
if (Ctx == Entity->getPrimaryContext())
|
|
return S;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// \brief Enter a new function scope
|
|
void Sema::PushFunctionScope() {
|
|
if (FunctionScopes.size() == 1) {
|
|
// Use the "top" function scope rather than having to allocate
|
|
// memory for a new scope.
|
|
FunctionScopes.back()->Clear();
|
|
FunctionScopes.push_back(FunctionScopes.back());
|
|
return;
|
|
}
|
|
|
|
FunctionScopes.push_back(new FunctionScopeInfo(getDiagnostics()));
|
|
}
|
|
|
|
void Sema::PushBlockScope(Scope *BlockScope, BlockDecl *Block) {
|
|
FunctionScopes.push_back(new BlockScopeInfo(getDiagnostics(),
|
|
BlockScope, Block));
|
|
}
|
|
|
|
void Sema::PopFunctionOrBlockScope(const AnalysisBasedWarnings::Policy *WP,
|
|
const Decl *D, const BlockExpr *blkExpr) {
|
|
FunctionScopeInfo *Scope = FunctionScopes.pop_back_val();
|
|
assert(!FunctionScopes.empty() && "mismatched push/pop!");
|
|
|
|
// Issue any analysis-based warnings.
|
|
if (WP && D)
|
|
AnalysisWarnings.IssueWarnings(*WP, Scope, D, blkExpr);
|
|
else {
|
|
for (llvm::SmallVectorImpl<sema::PossiblyUnreachableDiag>::iterator
|
|
i = Scope->PossiblyUnreachableDiags.begin(),
|
|
e = Scope->PossiblyUnreachableDiags.end();
|
|
i != e; ++i) {
|
|
const sema::PossiblyUnreachableDiag &D = *i;
|
|
Diag(D.Loc, D.PD);
|
|
}
|
|
}
|
|
|
|
if (FunctionScopes.back() != Scope) {
|
|
delete Scope;
|
|
}
|
|
}
|
|
|
|
/// \brief Determine whether any errors occurred within this function/method/
|
|
/// block.
|
|
bool Sema::hasAnyErrorsInThisFunction() const {
|
|
return getCurFunction()->ErrorTrap.hasErrorOccurred();
|
|
}
|
|
|
|
BlockScopeInfo *Sema::getCurBlock() {
|
|
if (FunctionScopes.empty())
|
|
return 0;
|
|
|
|
return dyn_cast<BlockScopeInfo>(FunctionScopes.back());
|
|
}
|
|
|
|
// Pin this vtable to this file.
|
|
ExternalSemaSource::~ExternalSemaSource() {}
|
|
|
|
std::pair<ObjCMethodList, ObjCMethodList>
|
|
ExternalSemaSource::ReadMethodPool(Selector Sel) {
|
|
return std::pair<ObjCMethodList, ObjCMethodList>();
|
|
}
|
|
|
|
void PrettyDeclStackTraceEntry::print(llvm::raw_ostream &OS) const {
|
|
SourceLocation Loc = this->Loc;
|
|
if (!Loc.isValid() && TheDecl) Loc = TheDecl->getLocation();
|
|
if (Loc.isValid()) {
|
|
Loc.print(OS, S.getSourceManager());
|
|
OS << ": ";
|
|
}
|
|
OS << Message;
|
|
|
|
if (TheDecl && isa<NamedDecl>(TheDecl)) {
|
|
std::string Name = cast<NamedDecl>(TheDecl)->getNameAsString();
|
|
if (!Name.empty())
|
|
OS << " '" << Name << '\'';
|
|
}
|
|
|
|
OS << '\n';
|
|
}
|