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/*
* Copyright 2010, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _FRAMEWORKS_COMPILE_SLANG_SLANG_BACKEND_H_ // NOLINT
#define _FRAMEWORKS_COMPILE_SLANG_SLANG_BACKEND_H_
#include "clang/AST/ASTConsumer.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Support/raw_ostream.h"
#include "slang.h"
#include "slang_pragma_recorder.h"
#include "slang_rs_check_ast.h"
#include "slang_rs_object_ref_count.h"
#include "slang_version.h"
namespace llvm {
class buffer_ostream;
class LLVMContext;
class NamedMDNode;
class Module;
}
namespace clang {
class ASTConsumer;
class ASTContext;
class CodeGenOptions;
class CodeGenerator;
class DeclGroupRef;
class DiagnosticsEngine;
class FunctionDecl;
class TagDecl;
class TargetOptions;
class VarDecl;
}
namespace slang {
class RSContext;
class Backend : public clang::ASTConsumer {
private:
const clang::TargetOptions &mTargetOpts;
llvm::Module *mpModule;
// Output stream
llvm::raw_ostream *mpOS;
Slang::OutputType mOT;
// This helps us translate Clang AST using into LLVM IR
clang::CodeGenerator *mGen;
// Passes
// Passes apply on function scope in a translation unit
llvm::legacy::FunctionPassManager *mPerFunctionPasses;
// Passes apply on module scope
llvm::legacy::PassManager *mPerModulePasses;
// Passes for code emission
llvm::legacy::FunctionPassManager *mCodeGenPasses;
llvm::buffer_ostream mBufferOutStream;
void CreateFunctionPasses();
void CreateModulePasses();
bool CreateCodeGenPasses();
void WrapBitcode(llvm::raw_string_ostream &Bitcode);
RSContext *mContext;
clang::SourceManager &mSourceMgr;
bool mAllowRSPrefix;
bool mIsFilterscript;
llvm::NamedMDNode *mExportVarMetadata;
llvm::NamedMDNode *mExportFuncMetadata;
llvm::NamedMDNode *mExportForEachNameMetadata;
llvm::NamedMDNode *mExportForEachSignatureMetadata;
llvm::NamedMDNode *mExportTypeMetadata;
llvm::NamedMDNode *mRSObjectSlotsMetadata;
RSObjectRefCount mRefCount;
RSCheckAST mASTChecker;
void AnnotateFunction(clang::FunctionDecl *FD);
void dumpExportVarInfo(llvm::Module *M);
void dumpExportFunctionInfo(llvm::Module *M);
void dumpExportForEachInfo(llvm::Module *M);
void dumpExportTypeInfo(llvm::Module *M);
protected:
llvm::LLVMContext &mLLVMContext;
clang::DiagnosticsEngine &mDiagEngine;
const clang::CodeGenOptions &mCodeGenOpts;
PragmaList *mPragmas;
unsigned int getTargetAPI() const { return mContext->getTargetAPI(); }
// TODO These are no longer virtual from base. Look into merging into caller.
// This handler will be invoked before Clang translates @Ctx to LLVM IR. This
// give you an opportunity to modified the IR in AST level (scope information,
// unoptimized IR, etc.). After the return from this method, slang will start
// translate @Ctx into LLVM IR. One should not operate on @Ctx afterwards
// since the changes applied on that never reflects to the LLVM module used
// in the final codegen.
void HandleTranslationUnitPre(clang::ASTContext &Ctx);
// This handler will be invoked when Clang have converted AST tree to LLVM IR.
// The @M contains the resulting LLVM IR tree. After the return from this
// method, slang will start doing optimization and code generation for @M.
void HandleTranslationUnitPost(llvm::Module *M);
public:
Backend(RSContext *Context,
clang::DiagnosticsEngine *DiagEngine,
const clang::CodeGenOptions &CodeGenOpts,
const clang::TargetOptions &TargetOpts,
PragmaList *Pragmas,
llvm::raw_ostream *OS,
Slang::OutputType OT,
clang::SourceManager &SourceMgr,
bool AllowRSPrefix,
bool IsFilterscript);
virtual ~Backend();
// Initialize - This is called to initialize the consumer, providing the
// ASTContext.
void Initialize(clang::ASTContext &Ctx) override;
// TODO Clean up what should be private, protected
// TODO Also clean up the include files
// HandleTopLevelDecl - Handle the specified top-level declaration. This is
// called by the parser to process every top-level Decl*. Note that D can be
// the head of a chain of Decls (e.g. for `int a, b` the chain will have two
// elements). Use Decl::getNextDeclarator() to walk the chain.
bool HandleTopLevelDecl(clang::DeclGroupRef D) override;
// HandleTranslationUnit - This method is called when the ASTs for entire
// translation unit have been parsed.
void HandleTranslationUnit(clang::ASTContext &Ctx) override;
// 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).
void HandleTagDeclDefinition(clang::TagDecl *D) override;
// CompleteTentativeDefinition - Callback invoked at the end of a translation
// unit to notify the consumer that the given tentative definition should be
// completed.
void CompleteTentativeDefinition(clang::VarDecl *D) override;
};
} // namespace slang
#endif // _FRAMEWORKS_COMPILE_SLANG_SLANG_BACKEND_H_ NOLINT
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