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//===-- llvm/CodeGen/DIEHash.h - Dwarf Hashing Framework -------*- C++ -*--===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains support for DWARF4 hashing of DIEs.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/MD5.h"
namespace llvm {
class CompileUnit;
/// \brief An object containing the capability of hashing and adding hash
/// attributes onto a DIE.
class DIEHash {
public:
/// \brief Initializes. The hash is default initialized.
DIEHash() {}
/// \brief Computes the ODR signature
uint64_t computeDIEODRSignature(DIE *Die);
// Helper routines to process parts of a DIE.
private:
/// \brief Adds the parent context of \param Die to the hash.
void addParentContext(DIE *Die);
// Routines that add DIEValues to the hash.
private:
/// \brief Encodes and adds \param Value to the hash as a ULEB128.
void addULEB128(uint64_t Value);
/// \brief Adds \param Str to the hash and includes a NULL byte.
void addString(StringRef Str);
private:
MD5 Hash;
};
}
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