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

Detailed Description

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

Definition at line 26 of file DIEHash.h.

Constructor & Destructor Documentation

DIEHash()

llvm::DIEHash::DIEHash ( AsmPrinter *  A = nullptr, DwarfCompileUnit *  CU = nullptr  )

inline

Definition at line 34 of file DIEHash.h.

Member Function Documentation

addSLEB128()

void DIEHash::addSLEB128

(

int64_t

Value

)

Encodes and adds.

Parameters

Value

to the hash as a SLEB128.

Definition at line 63 of file DIEHash.cpp.

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

Referenced by llvm::HashingByteStreamer::emitSLEB128().

addULEB128()

void DIEHash::addULEB128

(

uint64_t

Value

)

Encodes and adds.

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

Parameters

Value

to the hash as a ULEB128.

Definition at line 52 of file DIEHash.cpp.

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

Referenced by llvm::HashingByteStreamer::emitULEB128(), and hashRawTypeReference().

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 399 of file DIEHash.cpp.

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

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 422 of file DIEHash.cpp.

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

hashRawTypeReference()

void DIEHash::hashRawTypeReference

(

const DIE &

Entry

)

Definition at line 209 of file DIEHash.cpp.

References addULEB128().

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

update()

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

inline

Adds.

Parameters

Value

to the hash.

Definition at line 57 of file DIEHash.h.

References llvm::MD5::update().

Referenced by llvm::HashingByteStreamer::emitInt8().

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

• lib/CodeGen/AsmPrinter/DIEHash.h
• lib/CodeGen/AsmPrinter/DIEHash.cpp