//===----------------------------------------------------------------------===//
#include "clang/CodeGen/ModuleBuilder.h"
+#include "CGDebugInfo.h"
#include "CodeGenModule.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/Expr.h"
-using namespace clang;
-
-//===----------------------------------------------------------------------===//
-// LLVM Emitter
-
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/TargetInfo.h"
-#include "llvm/Module.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Support/Compiler.h"
-#include "llvm/ADT/OwningPtr.h"
+#include "clang/Frontend/CodeGenOptions.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include <memory>
+using namespace clang;
+using namespace CodeGen;
namespace {
- class VISIBILITY_HIDDEN CodeGeneratorImpl : public CodeGenerator {
- Diagnostic &Diags;
- llvm::OwningPtr<const llvm::TargetData> TD;
+ class CodeGeneratorImpl : public CodeGenerator {
+ DiagnosticsEngine &Diags;
ASTContext *Ctx;
- const LangOptions &Features;
- bool GenerateDebugInfo;
+ const HeaderSearchOptions &HeaderSearchOpts; // Only used for debug info.
+ const PreprocessorOptions &PreprocessorOpts; // Only used for debug info.
+ const CodeGenOptions CodeGenOpts; // Intentionally copied in.
+
+ unsigned HandlingTopLevelDecls;
+
+ /// Use this when emitting decls to block re-entrant decl emission. It will
+ /// emit all deferred decls on scope exit. Set EmitDeferred to false if decl
+ /// emission must be deferred longer, like at the end of a tag definition.
+ struct HandlingTopLevelDeclRAII {
+ CodeGeneratorImpl &Self;
+ bool EmitDeferred;
+ HandlingTopLevelDeclRAII(CodeGeneratorImpl &Self,
+ bool EmitDeferred = true)
+ : Self(Self), EmitDeferred(EmitDeferred) {
+ ++Self.HandlingTopLevelDecls;
+ }
+ ~HandlingTopLevelDeclRAII() {
+ unsigned Level = --Self.HandlingTopLevelDecls;
+ if (Level == 0 && EmitDeferred)
+ Self.EmitDeferredDecls();
+ }
+ };
+
+ CoverageSourceInfo *CoverageInfo;
+
protected:
- llvm::OwningPtr<llvm::Module> M;
- llvm::OwningPtr<CodeGen::CodeGenModule> Builder;
+ std::unique_ptr<llvm::Module> M;
+ std::unique_ptr<CodeGen::CodeGenModule> Builder;
+
+ private:
+ SmallVector<CXXMethodDecl *, 8> DeferredInlineMethodDefinitions;
+
public:
- CodeGeneratorImpl(Diagnostic &diags, const LangOptions &LO,
- const std::string& ModuleName,
- bool DebugInfoFlag)
- : Diags(diags), Features(LO), GenerateDebugInfo(DebugInfoFlag),
- M(new llvm::Module(ModuleName)) {}
-
- virtual ~CodeGeneratorImpl() {}
-
- virtual llvm::Module* ReleaseModule() {
- return M.take();
- }
-
- virtual void Initialize(ASTContext &Context) {
+ CodeGeneratorImpl(DiagnosticsEngine &diags, llvm::StringRef ModuleName,
+ const HeaderSearchOptions &HSO,
+ const PreprocessorOptions &PPO, const CodeGenOptions &CGO,
+ llvm::LLVMContext &C,
+ CoverageSourceInfo *CoverageInfo = nullptr)
+ : Diags(diags), Ctx(nullptr), HeaderSearchOpts(HSO),
+ PreprocessorOpts(PPO), CodeGenOpts(CGO), HandlingTopLevelDecls(0),
+ CoverageInfo(CoverageInfo), M(new llvm::Module(ModuleName, C)) {
+ C.setDiscardValueNames(CGO.DiscardValueNames);
+ }
+
+ ~CodeGeneratorImpl() override {
+ // There should normally not be any leftover inline method definitions.
+ assert(DeferredInlineMethodDefinitions.empty() ||
+ Diags.hasErrorOccurred());
+ }
+
+ CodeGenModule &CGM() {
+ return *Builder;
+ }
+
+ llvm::Module *GetModule() {
+ return M.get();
+ }
+
+ CGDebugInfo *getCGDebugInfo() {
+ return Builder->getModuleDebugInfo();
+ }
+
+ llvm::Module *ReleaseModule() {
+ return M.release();
+ }
+
+ const Decl *GetDeclForMangledName(StringRef MangledName) {
+ GlobalDecl Result;
+ if (!Builder->lookupRepresentativeDecl(MangledName, Result))
+ return nullptr;
+ const Decl *D = Result.getCanonicalDecl().getDecl();
+ if (auto FD = dyn_cast<FunctionDecl>(D)) {
+ if (FD->hasBody(FD))
+ return FD;
+ } else if (auto TD = dyn_cast<TagDecl>(D)) {
+ if (auto Def = TD->getDefinition())
+ return Def;
+ }
+ return D;
+ }
+
+ llvm::Constant *GetAddrOfGlobal(GlobalDecl global, bool isForDefinition) {
+ return Builder->GetAddrOfGlobal(global, ForDefinition_t(isForDefinition));
+ }
+
+ void Initialize(ASTContext &Context) override {
Ctx = &Context;
-
- M->setTargetTriple(Ctx->Target.getTargetTriple());
- M->setDataLayout(Ctx->Target.getTargetDescription());
- TD.reset(new llvm::TargetData(Ctx->Target.getTargetDescription()));
- Builder.reset(new CodeGen::CodeGenModule(Context, Features, *M, *TD,
- Diags, GenerateDebugInfo,
- false));
- }
-
- virtual void HandleTopLevelDecl(Decl *D) {
- // If an error occurred, stop code generation, but continue parsing and
- // semantic analysis (to ensure all warnings and errors are emitted).
+
+ M->setTargetTriple(Ctx->getTargetInfo().getTriple().getTriple());
+ M->setDataLayout(Ctx->getTargetInfo().getDataLayout());
+ Builder.reset(new CodeGen::CodeGenModule(Context, HeaderSearchOpts,
+ PreprocessorOpts, CodeGenOpts,
+ *M, Diags, CoverageInfo));
+
+ for (auto &&Lib : CodeGenOpts.DependentLibraries)
+ Builder->AddDependentLib(Lib);
+ for (auto &&Opt : CodeGenOpts.LinkerOptions)
+ Builder->AppendLinkerOptions(Opt);
+ }
+
+ void HandleCXXStaticMemberVarInstantiation(VarDecl *VD) override {
if (Diags.hasErrorOccurred())
return;
- if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
- Builder->EmitGlobal(FD);
- } else if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
- Builder->EmitGlobal(VD);
- } else if (isa<ObjCClassDecl>(D)){
- //Forward declaration. Only used for type checking.
- } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)){
- // Generate Protocol object.
- Builder->EmitObjCProtocolImplementation(PD);
- } else if (isa<ObjCCategoryDecl>(D)){
- //Only used for typechecking.
- } else if (ObjCCategoryImplDecl *OCD = dyn_cast<ObjCCategoryImplDecl>(D)){
- // Generate methods, attach to category structure
- Builder->EmitObjCCategoryImpl(OCD);
- } else if (ObjCImplementationDecl * OID =
- dyn_cast<ObjCImplementationDecl>(D)){
- // Generate methods, attach to class structure
- Builder->EmitObjCClassImplementation(OID);
- } else if (isa<ObjCInterfaceDecl>(D)){
- // Ignore - generated when the implementation decl is CodeGen'd
- } else if (ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(D)){
- Builder->EmitObjCMethod(OMD);
- } else if (isa<ObjCClassDecl>(D) || isa<ObjCCategoryDecl>(D)) {
- // Forward declaration. Only used for type checking.
- } else if (ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(D)){
- Builder->EmitObjCMethod(OMD);
- } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
- if (LSD->getLanguage() == LinkageSpecDecl::lang_cxx)
- Builder->WarnUnsupported(LSD, "linkage spec");
- // FIXME: implement C++ linkage, C linkage works mostly by C
- // language reuse already.
- } else if (FileScopeAsmDecl *AD = dyn_cast<FileScopeAsmDecl>(D)) {
- std::string AsmString(AD->getAsmString()->getStrData(),
- AD->getAsmString()->getByteLength());
-
- const std::string &S = Builder->getModule().getModuleInlineAsm();
- if (S.empty())
- Builder->getModule().setModuleInlineAsm(AsmString);
- else
- Builder->getModule().setModuleInlineAsm(S + '\n' + AsmString);
- } else {
- assert(isa<TypeDecl>(D) && "Unknown top level decl");
- // TODO: handle debug info?
- }
+ Builder->HandleCXXStaticMemberVarInstantiation(VD);
+ }
+
+ bool HandleTopLevelDecl(DeclGroupRef DG) override {
+ if (Diags.hasErrorOccurred())
+ return true;
+
+ HandlingTopLevelDeclRAII HandlingDecl(*this);
+
+ // Make sure to emit all elements of a Decl.
+ for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I)
+ Builder->EmitTopLevelDecl(*I);
+
+ return true;
+ }
+
+ void EmitDeferredDecls() {
+ if (DeferredInlineMethodDefinitions.empty())
+ return;
+
+ // Emit any deferred inline method definitions. Note that more deferred
+ // methods may be added during this loop, since ASTConsumer callbacks
+ // can be invoked if AST inspection results in declarations being added.
+ HandlingTopLevelDeclRAII HandlingDecl(*this);
+ for (unsigned I = 0; I != DeferredInlineMethodDefinitions.size(); ++I)
+ Builder->EmitTopLevelDecl(DeferredInlineMethodDefinitions[I]);
+ DeferredInlineMethodDefinitions.clear();
+ }
+
+ void HandleInlineFunctionDefinition(FunctionDecl *D) override {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ assert(D->doesThisDeclarationHaveABody());
- if (ScopedDecl *SD = dyn_cast<ScopedDecl>(D)) {
- SD = SD->getNextDeclarator();
- if (SD)
- HandleTopLevelDecl(SD);
+ // Handle friend functions.
+ if (D->isInIdentifierNamespace(Decl::IDNS_OrdinaryFriend)) {
+ if (Ctx->getTargetInfo().getCXXABI().isMicrosoft()
+ && !D->getLexicalDeclContext()->isDependentContext())
+ Builder->EmitTopLevelDecl(D);
+ return;
}
+
+ // Otherwise, must be a method.
+ auto MD = cast<CXXMethodDecl>(D);
+
+ // We may want to emit this definition. However, that decision might be
+ // based on computing the linkage, and we have to defer that in case we
+ // are inside of something that will change the method's final linkage,
+ // e.g.
+ // typedef struct {
+ // void bar();
+ // void foo() { bar(); }
+ // } A;
+ DeferredInlineMethodDefinitions.push_back(MD);
+
+ // Provide some coverage mapping even for methods that aren't emitted.
+ // Don't do this for templated classes though, as they may not be
+ // instantiable.
+ if (!MD->getParent()->isDependentContext())
+ Builder->AddDeferredUnusedCoverageMapping(MD);
}
-
+
/// HandleTagDeclDefinition - This callback is invoked each time a TagDecl
- /// (e.g. struct, union, enum, class) is completed. This allows the client to
- /// hack on the type, which can occur at any point in the file (because these
- /// can be defined in declspecs).
- virtual void HandleTagDeclDefinition(TagDecl *D) {
+ /// to (e.g. struct, union, enum, class) is completed. This allows the
+ /// client hack on the type, which can occur at any point in the file
+ /// (because these can be defined in declspecs).
+ void HandleTagDeclDefinition(TagDecl *D) override {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ // Don't allow re-entrant calls to CodeGen triggered by PCH
+ // deserialization to emit deferred decls.
+ HandlingTopLevelDeclRAII HandlingDecl(*this, /*EmitDeferred=*/false);
+
Builder->UpdateCompletedType(D);
+
+ // For MSVC compatibility, treat declarations of static data members with
+ // inline initializers as definitions.
+ if (Ctx->getTargetInfo().getCXXABI().isMicrosoft()) {
+ for (Decl *Member : D->decls()) {
+ if (VarDecl *VD = dyn_cast<VarDecl>(Member)) {
+ if (Ctx->isMSStaticDataMemberInlineDefinition(VD) &&
+ Ctx->DeclMustBeEmitted(VD)) {
+ Builder->EmitGlobal(VD);
+ }
+ }
+ }
+ }
+ // For OpenMP emit declare reduction functions, if required.
+ if (Ctx->getLangOpts().OpenMP) {
+ for (Decl *Member : D->decls()) {
+ if (auto *DRD = dyn_cast<OMPDeclareReductionDecl>(Member)) {
+ if (Ctx->DeclMustBeEmitted(DRD))
+ Builder->EmitGlobal(DRD);
+ }
+ }
+ }
}
- virtual void HandleTranslationUnit(TranslationUnit& TU) {
+ void HandleTagDeclRequiredDefinition(const TagDecl *D) override {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ // Don't allow re-entrant calls to CodeGen triggered by PCH
+ // deserialization to emit deferred decls.
+ HandlingTopLevelDeclRAII HandlingDecl(*this, /*EmitDeferred=*/false);
+
+ if (CodeGen::CGDebugInfo *DI = Builder->getModuleDebugInfo())
+ if (const RecordDecl *RD = dyn_cast<RecordDecl>(D))
+ DI->completeRequiredType(RD);
+ }
+
+ void HandleTranslationUnit(ASTContext &Ctx) override {
+ // Release the Builder when there is no error.
+ if (!Diags.hasErrorOccurred() && Builder)
+ Builder->Release();
+
+ // If there are errors before or when releasing the Builder, reset
+ // the module to stop here before invoking the backend.
if (Diags.hasErrorOccurred()) {
+ if (Builder)
+ Builder->clear();
M.reset();
return;
}
+ }
- if (Builder)
- Builder->Release();
- };
+ void AssignInheritanceModel(CXXRecordDecl *RD) override {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ Builder->RefreshTypeCacheForClass(RD);
+ }
+
+ void CompleteTentativeDefinition(VarDecl *D) override {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ Builder->EmitTentativeDefinition(D);
+ }
+
+ void HandleVTable(CXXRecordDecl *RD) override {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ Builder->EmitVTable(RD);
+ }
};
}
-CodeGenerator *clang::CreateLLVMCodeGen(Diagnostic &Diags,
- const LangOptions &Features,
- const std::string& ModuleName,
- bool GenerateDebugInfo) {
- return new CodeGeneratorImpl(Diags, Features, ModuleName, GenerateDebugInfo);
+void CodeGenerator::anchor() { }
+
+CodeGenModule &CodeGenerator::CGM() {
+ return static_cast<CodeGeneratorImpl*>(this)->CGM();
+}
+
+llvm::Module *CodeGenerator::GetModule() {
+ return static_cast<CodeGeneratorImpl*>(this)->GetModule();
+}
+
+llvm::Module *CodeGenerator::ReleaseModule() {
+ return static_cast<CodeGeneratorImpl*>(this)->ReleaseModule();
+}
+
+CGDebugInfo *CodeGenerator::getCGDebugInfo() {
+ return static_cast<CodeGeneratorImpl*>(this)->getCGDebugInfo();
+}
+
+const Decl *CodeGenerator::GetDeclForMangledName(llvm::StringRef name) {
+ return static_cast<CodeGeneratorImpl*>(this)->GetDeclForMangledName(name);
+}
+
+llvm::Constant *CodeGenerator::GetAddrOfGlobal(GlobalDecl global,
+ bool isForDefinition) {
+ return static_cast<CodeGeneratorImpl*>(this)
+ ->GetAddrOfGlobal(global, isForDefinition);
+}
+
+CodeGenerator *clang::CreateLLVMCodeGen(
+ DiagnosticsEngine &Diags, llvm::StringRef ModuleName,
+ const HeaderSearchOptions &HeaderSearchOpts,
+ const PreprocessorOptions &PreprocessorOpts, const CodeGenOptions &CGO,
+ llvm::LLVMContext &C, CoverageSourceInfo *CoverageInfo) {
+ return new CodeGeneratorImpl(Diags, ModuleName, HeaderSearchOpts,
+ PreprocessorOpts, CGO, C, CoverageInfo);
}
projects / clang / blobdiff