1f51a89d39
These were ignored by git accidentally. We want ALL OF THEM since they all came in the llvm/clang source distribution.
81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
//===--- CodeGenTBAA.h - TBAA information for LLVM CodeGen ------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This is the code that manages TBAA information and defines the TBAA policy
|
|
// for the optimizer to use.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef CLANG_CODEGEN_CODEGENTBAA_H
|
|
#define CLANG_CODEGEN_CODEGENTBAA_H
|
|
|
|
#include "clang/Basic/LLVM.h"
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include "llvm/Support/MDBuilder.h"
|
|
|
|
namespace llvm {
|
|
class LLVMContext;
|
|
class MDNode;
|
|
}
|
|
|
|
namespace clang {
|
|
class ASTContext;
|
|
class LangOptions;
|
|
class MangleContext;
|
|
class QualType;
|
|
class Type;
|
|
|
|
namespace CodeGen {
|
|
class CGRecordLayout;
|
|
|
|
/// CodeGenTBAA - This class organizes the cross-module state that is used
|
|
/// while lowering AST types to LLVM types.
|
|
class CodeGenTBAA {
|
|
ASTContext &Context;
|
|
llvm::LLVMContext& VMContext;
|
|
const LangOptions &Features;
|
|
MangleContext &MContext;
|
|
|
|
// MDHelper - Helper for creating metadata.
|
|
llvm::MDBuilder MDHelper;
|
|
|
|
/// MetadataCache - This maps clang::Types to llvm::MDNodes describing them.
|
|
llvm::DenseMap<const Type *, llvm::MDNode *> MetadataCache;
|
|
|
|
llvm::MDNode *Root;
|
|
llvm::MDNode *Char;
|
|
|
|
/// getRoot - This is the mdnode for the root of the metadata type graph
|
|
/// for this translation unit.
|
|
llvm::MDNode *getRoot();
|
|
|
|
/// getChar - This is the mdnode for "char", which is special, and any types
|
|
/// considered to be equivalent to it.
|
|
llvm::MDNode *getChar();
|
|
|
|
public:
|
|
CodeGenTBAA(ASTContext &Ctx, llvm::LLVMContext &VMContext,
|
|
const LangOptions &Features,
|
|
MangleContext &MContext);
|
|
~CodeGenTBAA();
|
|
|
|
/// getTBAAInfo - Get the TBAA MDNode to be used for a dereference
|
|
/// of the given type.
|
|
llvm::MDNode *getTBAAInfo(QualType QTy);
|
|
|
|
/// getTBAAInfoForVTablePtr - Get the TBAA MDNode to be used for a
|
|
/// dereference of a vtable pointer.
|
|
llvm::MDNode *getTBAAInfoForVTablePtr();
|
|
};
|
|
|
|
} // end namespace CodeGen
|
|
} // end namespace clang
|
|
|
|
#endif
|