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//===--- CodeGenAction.h - LLVM Code Generation Frontend Action -*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_CODEGEN_CODEGENACTION_H
#define LLVM_CLANG_CODEGEN_CODEGENACTION_H
#include "clang/Frontend/FrontendAction.h"
#include <memory>
namespace llvm {
class LLVMContext;
class Module;
}
namespace clang {
class BackendConsumer;
class CodeGenerator;
class CodeGenAction : public ASTFrontendAction {
private:
// Let BackendConsumer access LinkModule.
friend class BackendConsumer;
/// Info about module to link into a module we're generating.
struct LinkModule {
/// The module to link in.
std::unique_ptr<llvm::Module> Module;
/// If true, we set attributes on Module's functions according to our
/// CodeGenOptions and LangOptions, as though we were generating the
/// function ourselves.
bool PropagateAttrs;
/// If true, we use LLVM module internalizer.
bool Internalize;
/// Bitwise combination of llvm::LinkerFlags used when we link the module.
unsigned LinkFlags;
};
unsigned Act;
std::unique_ptr<llvm::Module> TheModule;
/// Bitcode modules to link in to our module.
SmallVector<LinkModule, 4> LinkModules;
llvm::LLVMContext *VMContext;
bool OwnsVMContext;
std::unique_ptr<llvm::Module> loadModule(llvm::MemoryBufferRef MBRef);
/// Load bitcode modules to link into our module from the options.
bool loadLinkModules(CompilerInstance &CI);
protected:
bool BeginSourceFileAction(CompilerInstance &CI) override;
/// Create a new code generation action. If the optional \p _VMContext
/// parameter is supplied, the action uses it without taking ownership,
/// otherwise it creates a fresh LLVM context and takes ownership.
CodeGenAction(unsigned _Act, llvm::LLVMContext *_VMContext = nullptr);
bool hasIRSupport() const override;
std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) override;
void ExecuteAction() override;
void EndSourceFileAction() override;
public:
~CodeGenAction() override;
/// Take the generated LLVM module, for use after the action has been run.
/// The result may be null on failure.
std::unique_ptr<llvm::Module> takeModule();
/// Take the LLVM context used by this action.
llvm::LLVMContext *takeLLVMContext();
CodeGenerator *getCodeGenerator() const;
BackendConsumer *BEConsumer = nullptr;
};
class EmitAssemblyAction : public CodeGenAction {
virtual void anchor();
public:
EmitAssemblyAction(llvm::LLVMContext *_VMContext = nullptr);
};
class EmitBCAction : public CodeGenAction {
virtual void anchor();
public:
EmitBCAction(llvm::LLVMContext *_VMContext = nullptr);
};
class EmitLLVMAction : public CodeGenAction {
virtual void anchor();
public:
EmitLLVMAction(llvm::LLVMContext *_VMContext = nullptr);
};
class EmitLLVMOnlyAction : public CodeGenAction {
virtual void anchor();
public:
EmitLLVMOnlyAction(llvm::LLVMContext *_VMContext = nullptr);
};
class EmitCodeGenOnlyAction : public CodeGenAction {
virtual void anchor();
public:
EmitCodeGenOnlyAction(llvm::LLVMContext *_VMContext = nullptr);
};
class EmitObjAction : public CodeGenAction {
virtual void anchor();
public:
EmitObjAction(llvm::LLVMContext *_VMContext = nullptr);
};
}
#endif
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