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https://github.com/capstone-engine/llvm-capstone.git
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beecd58e21
tentative definitions off to the ASTConsumer at the end of the translation unit. Eliminate CodeGen's internal tracking of tentative definitions, and instead hook into ASTConsumer::CompleteTentativeDefinition. Also, tweak the definition-deferal logic for C++, where there are no tentative definitions. Fixes <rdar://problem/6808352>, and will make it much easier for precompiled headers to cope with tentative definitions in the future. llvm-svn: 69681
101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
//===--- ModuleBuilder.cpp - Emit LLVM Code from ASTs ---------------------===//
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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 builds an AST and converts it to LLVM Code.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/CodeGen/ModuleBuilder.h"
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#include "CodeGenModule.h"
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#include "clang/Frontend/CompileOptions.h"
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#include "clang/AST/ASTContext.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/Basic/Diagnostic.h"
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#include "clang/Basic/TargetInfo.h"
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#include "llvm/Module.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/ADT/OwningPtr.h"
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using namespace clang;
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namespace {
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class VISIBILITY_HIDDEN CodeGeneratorImpl : public CodeGenerator {
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Diagnostic &Diags;
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llvm::OwningPtr<const llvm::TargetData> TD;
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ASTContext *Ctx;
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const CompileOptions CompileOpts; // Intentionally copied in.
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protected:
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llvm::OwningPtr<llvm::Module> M;
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llvm::OwningPtr<CodeGen::CodeGenModule> Builder;
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public:
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CodeGeneratorImpl(Diagnostic &diags, const std::string& ModuleName,
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const CompileOptions &CO)
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: Diags(diags), CompileOpts(CO), M(new llvm::Module(ModuleName)) {}
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virtual ~CodeGeneratorImpl() {}
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virtual llvm::Module* GetModule() {
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return M.get();
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}
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virtual llvm::Module* ReleaseModule() {
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return M.take();
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}
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virtual void Initialize(ASTContext &Context) {
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Ctx = &Context;
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M->setTargetTriple(Ctx->Target.getTargetTriple());
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M->setDataLayout(Ctx->Target.getTargetDescription());
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TD.reset(new llvm::TargetData(Ctx->Target.getTargetDescription()));
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Builder.reset(new CodeGen::CodeGenModule(Context, CompileOpts,
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*M, *TD, Diags));
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}
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virtual void HandleTopLevelDecl(DeclGroupRef DG) {
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// Make sure to emit all elements of a Decl.
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for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I)
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Builder->EmitTopLevelDecl(*I);
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}
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/// HandleTagDeclDefinition - This callback is invoked each time a TagDecl
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/// to (e.g. struct, union, enum, class) is completed. This allows the
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/// client hack on the type, which can occur at any point in the file
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/// (because these can be defined in declspecs).
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virtual void HandleTagDeclDefinition(TagDecl *D) {
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Builder->UpdateCompletedType(D);
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}
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virtual void HandleTranslationUnit(ASTContext &Ctx) {
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if (Diags.hasErrorOccurred()) {
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M.reset();
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return;
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}
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if (Builder)
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Builder->Release();
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};
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virtual void CompleteTentativeDefinition(VarDecl *D) {
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if (Diags.hasErrorOccurred())
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return;
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Builder->EmitTentativeDefinition(D);
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}
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};
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}
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CodeGenerator *clang::CreateLLVMCodeGen(Diagnostic &Diags,
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const std::string& ModuleName,
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const CompileOptions &CO) {
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return new CodeGeneratorImpl(Diags, ModuleName, CO);
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}
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