llvm::DIEHash Class Reference

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

#include <DIEHash.h>

List of all members.

Classes
struct	AttrEntry
struct	DIEAttrs
Public Member Functions
	DIEHash (AsmPrinter *A=nullptr)
uint64_t	computeDIEODRSignature (const DIE &Die)
	Computes the ODR signature.
uint64_t	computeCUSignature (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.

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Detailed Description

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

Definition at line 28 of file DIEHash.h.

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Constructor & Destructor Documentation

llvm::DIEHash::DIEHash

(

AsmPrinter *

A = nullptr

)

[inline]

Definition at line 92 of file DIEHash.h.

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Member Function Documentation

void DIEHash::addSLEB128

(

int64_t

Value

)

Encodes and adds.

Parameters:

Value

to the hash as a SLEB128.

Definition at line 73 of file DIEHash.cpp.

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

Referenced by llvm::HashingByteStreamer::EmitSLEB128().

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 62 of file DIEHash.cpp.

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

Referenced by computeDIEODRSignature(), and llvm::HashingByteStreamer::EmitULEB128().

uint64_t DIEHash::computeCUSignature

(

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 520 of file DIEHash.cpp.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT >::clear(), and llvm::MD5::final().

uint64_t DIEHash::computeDIEODRSignature

(

const DIE &

Die

)

Computes the ODR signature.

This is based on the type signature computation given in section 7.27 of the DWARF4 standard. It is the md5 hash of a flattened description of the DIE with the exception that we are hashing only the context and the name of the type.

Definition at line 488 of file DIEHash.cpp.

References addULEB128(), llvm::dwarf::DW_AT_name, llvm::MD5::final(), getDIEStringAttr(), llvm::DIE::getParent(), and llvm::DIE::getTag().

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 541 of file DIEHash.cpp.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT >::clear(), llvm::MD5::final(), and llvm::DIE::getParent().

void llvm::DIEHash::update

(

uint8_t

Value

)

[inline]

Adds.

Parameters:

Value

to the hash.

Definition at line 117 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:

• DIEHash.h
• DIEHash.cpp