LLVM  6.0.0svn
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llvm::DIEHash Class Reference

An object containing the capability of hashing and adding hash attributes onto a DIE. More...

#include "CodeGen/AsmPrinter/DIEHash.h"

Public Member Functions

 DIEHash (AsmPrinter *A=nullptr)
 
uint64_t computeCUSignature (StringRef DWOName, const DIE &Die)
 Computes the CU signature. More...
 
uint64_t computeTypeSignature (const DIE &Die)
 Computes the type signature. More...
 
void update (uint8_t Value)
 Adds. More...
 
void addULEB128 (uint64_t Value)
 Encodes and adds. More...
 
void addSLEB128 (int64_t Value)
 Encodes and adds. More...
 

Detailed Description

An object containing the capability of hashing and adding hash attributes onto a DIE.

Definition at line 28 of file DIEHash.h.

Constructor & Destructor Documentation

◆ DIEHash()

llvm::DIEHash::DIEHash ( AsmPrinter A = nullptr)
inline

Definition at line 36 of file DIEHash.h.

References computeCUSignature(), and computeTypeSignature().

Member Function Documentation

◆ addSLEB128()

void DIEHash::addSLEB128 ( int64_t  Value)

◆ addULEB128()

void DIEHash::addULEB128 ( uint64_t  Value)

Encodes and adds.

Adds the unsigned in Value to the hash encoded as a ULEB128.

Parameters
Valueto the hash as a ULEB128.

Definition at line 55 of file DIEHash.cpp.

References llvm::dbgs(), DEBUG, and llvm::MD5::update().

Referenced by addSLEB128(), llvm::HashingByteStreamer::EmitULEB128(), and update().

◆ computeCUSignature()

uint64_t DIEHash::computeCUSignature ( StringRef  DWOName,
const DIE Die 
)

Computes the CU signature.

This is based on the type signature computation given in section 7.27 of the DWARF4 standard.

It is an md5 hash of the flattened description of the DIE with the inclusion of the full CU and all top level CU entities.

Definition at line 383 of file DIEHash.cpp.

References llvm::StringRef::empty(), llvm::MD5::final(), llvm::MD5::MD5Result::high(), and llvm::MD5::update().

Referenced by llvm::DwarfDebug::beginModule(), and DIEHash().

◆ computeTypeSignature()

uint64_t DIEHash::computeTypeSignature ( const DIE Die)

Computes the type signature.

This is based on the type signature computation given in section 7.27 of the DWARF4 standard.

It is an md5 hash of the flattened description of the DIE with the inclusion of additional forms not specifically called out in the standard.

Definition at line 406 of file DIEHash.cpp.

References llvm::MD5::final(), llvm::DIE::getParent(), and llvm::MD5::MD5Result::high().

Referenced by DIEHash().

◆ update()

void llvm::DIEHash::update ( uint8_t  Value)
inline

Adds.

Parameters
Valueto the hash.

Definition at line 58 of file DIEHash.h.

References addSLEB128(), addULEB128(), llvm::AMDGPU::HSAMD::Kernel::Key::Attrs, and Numbering.

Referenced by llvm::HashingByteStreamer::EmitInt8().


The documentation for this class was generated from the following files: