forked from OSchip/llvm-project
96 lines
3.3 KiB
C++
96 lines
3.3 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/AST/ASTConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Decl.h"
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// LLVM Emitter
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/CodeGen/ModuleBuilder.h"
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#include "llvm/Module.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetMachine.h"
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namespace {
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class CodeGenerator : public ASTConsumer {
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Diagnostic &Diags;
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const llvm::TargetData *TD;
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ASTContext *Ctx;
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const LangOptions &Features;
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protected:
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llvm::Module *&M;
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CodeGen::CodeGenModule *Builder;
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public:
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CodeGenerator(Diagnostic &diags, const LangOptions &LO,
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llvm::Module *&DestModule)
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: Diags(diags), Features(LO), M(DestModule) {}
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~CodeGenerator() {
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delete Builder;
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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 = new llvm::TargetData(Ctx->Target.getTargetDescription());
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Builder = new CodeGen::CodeGenModule(Context, Features, *M, *TD, Diags);
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}
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virtual void HandleTopLevelDecl(Decl *D) {
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// If an error occurred, stop code generation, but continue parsing and
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// semantic analysis (to ensure all warnings and errors are emitted).
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if (Diags.hasErrorOccurred())
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return;
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if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
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Builder->EmitFunction(FD);
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} else if (FileVarDecl *FVD = dyn_cast<FileVarDecl>(D)) {
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Builder->EmitGlobalVarDeclarator(FVD);
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} else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
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if (LSD->getLanguage() == LinkageSpecDecl::lang_cxx)
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Builder->WarnUnsupported(LSD, "linkage spec");
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// FIXME: implement C++ linkage, C linkage works mostly by C
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// language reuse already.
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} else {
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assert(isa<TypeDecl>(D) && "Unknown top level decl");
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// TODO: handle debug info?
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}
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}
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/// HandleTagDeclDefinition - This callback is invoked each time a TagDecl
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/// (e.g. struct, union, enum, class) is completed. This allows the client to
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/// hack on the type, which can occur at any point in the file (because these
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/// can be defined in declspecs).
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virtual void HandleTagDeclDefinition(TagDecl *D) {
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Builder->EmitType(D);
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}
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};
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}
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ASTConsumer *clang::CreateLLVMCodeGen(Diagnostic &Diags,
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const LangOptions &Features,
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llvm::Module *&DestModule) {
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return new CodeGenerator(Diags, Features, DestModule);
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}
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