llvm::CodeGenDataReader Class Reference

#include "llvm/CGData/CodeGenDataReader.h"

Inheritance diagram for llvm::CodeGenDataReader:

Public Member Functions
	CodeGenDataReader ()=default
virtual	~CodeGenDataReader ()=default
virtual Error	read ()=0
	Read the header. Required before reading first record.
virtual uint32_t	getVersion () const =0
	Return the codegen data version.
virtual CGDataKind	getDataKind () const =0
	Return the codegen data kind.
virtual bool	hasOutlinedHashTree () const =0
	Return true if the data has an outlined hash tree.
virtual bool	hasStableFunctionMap () const =0
	Return true if the data has a stable function map.
std::unique_ptr< OutlinedHashTree >	releaseOutlinedHashTree ()
	Return the outlined hash tree that is released from the reader.
std::unique_ptr< StableFunctionMap >	releaseStableFunctionMap ()

Static Public Member Functions
static LLVM_ABI Expected< std::unique_ptr< CodeGenDataReader > >	create (const Twine &Path, vfs::FileSystem &FS, bool LazyLoading=false)
	Factory method to create an appropriately typed reader for the given codegen data file path and file system.
static LLVM_ABI Expected< std::unique_ptr< CodeGenDataReader > >	create (std::unique_ptr< MemoryBuffer > Buffer, bool LazyLoading=false)
	Factory method to create an appropriately typed reader for the given memory buffer.
static LLVM_ABI Error	mergeFromObjectFile (const object::ObjectFile *Obj, OutlinedHashTreeRecord &GlobalOutlineRecord, StableFunctionMapRecord &GlobalFunctionMapRecord, stable_hash *CombinedHash=nullptr)
	Extract the cgdata embedded in sections from the given object file and merge them into the GlobalOutlineRecord.

Protected Member Functions
Error	error (cgdata_error Err, const std::string &ErrMsg="")
	Set the current error and return same.
Error	error (Error &&E)
Error	success ()
	Clear the current error and return a successful one.

Protected Attributes
OutlinedHashTreeRecord	HashTreeRecord
	The outlined hash tree that has been read.
StableFunctionMapRecord	FunctionMapRecord
	The stable function map that has been read. When it's released by.

Detailed Description

Definition at line 25 of file CodeGenDataReader.h.

Constructor & Destructor Documentation

CodeGenDataReader()

llvm::CodeGenDataReader::CodeGenDataReader ( )

default

~CodeGenDataReader()

virtual llvm::CodeGenDataReader::~CodeGenDataReader ( )

virtualdefault

Member Function Documentation

create() [1/2]

Expected< std::unique_ptr< CodeGenDataReader > > llvm::CodeGenDataReader::create ( const Twine & Path, vfs::FileSystem & FS, bool LazyLoading = false )

static

Factory method to create an appropriately typed reader for the given codegen data file path and file system.

LazyLoading defers deserializing the stable function map of indexed codegen data.

Definition at line 132 of file CodeGenDataReader.cpp.

References create(), and llvm::setupMemoryBuffer().

Referenced by create(), and llvm::CodeGenData::getInstance().

create() [2/2]

Expected< std::unique_ptr< CodeGenDataReader > > llvm::CodeGenDataReader::create ( std::unique_ptr< MemoryBuffer > Buffer, bool LazyLoading = false )

static

Factory method to create an appropriately typed reader for the given memory buffer.

Definition at line 142 of file CodeGenDataReader.cpp.

References llvm::empty_cgdata, llvm::IndexedCodeGenDataReader::hasFormat(), llvm::TextCodeGenDataReader::hasFormat(), llvm::make_error(), and llvm::malformed.

error() [1/2]

Error llvm::CodeGenDataReader::error ( cgdata_error Err, const std::string & ErrMsg = "" )

inlineprotected

Set the current error and return same.

Definition at line 83 of file CodeGenDataReader.h.

References llvm::make_error(), llvm::success, and llvm::Error::success().

error() [2/2]

Error llvm::CodeGenDataReader::error ( Error && E )

inlineprotected

Definition at line 91 of file CodeGenDataReader.h.

References E(), llvm::CGDataError::get(), llvm::CGDataError::getMessage(), llvm::handleAllErrors(), and llvm::make_error().

getDataKind()

virtual CGDataKind llvm::CodeGenDataReader::getDataKind ( ) const

pure virtual

Return the codegen data kind.

Implemented in llvm::IndexedCodeGenDataReader, and llvm::TextCodeGenDataReader.

getVersion()

virtual uint32_t llvm::CodeGenDataReader::getVersion ( ) const

pure virtual

Return the codegen data version.

Implemented in llvm::IndexedCodeGenDataReader, and llvm::TextCodeGenDataReader.

hasOutlinedHashTree()

virtual bool llvm::CodeGenDataReader::hasOutlinedHashTree ( ) const

pure virtual

Return true if the data has an outlined hash tree.

Implemented in llvm::IndexedCodeGenDataReader, and llvm::TextCodeGenDataReader.

hasStableFunctionMap()

virtual bool llvm::CodeGenDataReader::hasStableFunctionMap ( ) const

pure virtual

Return true if the data has a stable function map.

Implemented in llvm::IndexedCodeGenDataReader, and llvm::TextCodeGenDataReader.

mergeFromObjectFile()

Error llvm::CodeGenDataReader::mergeFromObjectFile ( const object::ObjectFile * Obj, OutlinedHashTreeRecord & GlobalOutlineRecord, StableFunctionMapRecord & GlobalFunctionMapRecord, stable_hash * CombinedHash = nullptr )

static

Extract the cgdata embedded in sections from the given object file and merge them into the GlobalOutlineRecord.

This is a static helper that is used by llvm-cgdata --merge or ThinLTO's two-codegen rounds. Optionally, CombinedHash can be used to compuate the combined hash of the merged data.

Definition at line 40 of file CodeGenDataReader.cpp.

References llvm::Data, llvm::OutlinedHashTreeRecord::deserialize(), llvm::StableFunctionMapRecord::deserialize(), llvm::getCodeGenDataSectionName(), llvm::OutlinedHashTreeRecord::merge(), llvm::StableFunctionMapRecord::merge(), llvm::stable_hash_combine(), llvm::Error::success(), llvm::Expected< T >::takeError(), and llvm::xxh3_64bits().

Referenced by llvm::cgdata::mergeCodeGenData().

read()

virtual Error llvm::CodeGenDataReader::read ( )

pure virtual

Read the header. Required before reading first record.

Implemented in llvm::IndexedCodeGenDataReader, and llvm::TextCodeGenDataReader.

releaseOutlinedHashTree()

std::unique_ptr< OutlinedHashTree > llvm::CodeGenDataReader::releaseOutlinedHashTree ( )

inline

Return the outlined hash tree that is released from the reader.

Definition at line 44 of file CodeGenDataReader.h.

References HashTreeRecord.

releaseStableFunctionMap()

std::unique_ptr< StableFunctionMap > llvm::CodeGenDataReader::releaseStableFunctionMap ( )

inline

Definition at line 47 of file CodeGenDataReader.h.

References FunctionMapRecord.

success()

Error llvm::CodeGenDataReader::success ( )

inlineprotected

Clear the current error and return a successful one.

Definition at line 100 of file CodeGenDataReader.h.

References error, and llvm::success.

Referenced by llvm::IndexedCodeGenDataReader::read().

Member Data Documentation

FunctionMapRecord

StableFunctionMapRecord llvm::CodeGenDataReader::FunctionMapRecord

protected

The stable function map that has been read. When it's released by.

Definition at line 80 of file CodeGenDataReader.h.

Referenced by llvm::IndexedCodeGenDataReader::read(), llvm::TextCodeGenDataReader::read(), and releaseStableFunctionMap().

HashTreeRecord

OutlinedHashTreeRecord llvm::CodeGenDataReader::HashTreeRecord

protected

The outlined hash tree that has been read.

When it's released by releaseOutlinedHashTree(), it's no longer valid.

Definition at line 76 of file CodeGenDataReader.h.

Referenced by llvm::IndexedCodeGenDataReader::read(), llvm::TextCodeGenDataReader::read(), and releaseOutlinedHashTree().

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

• include/llvm/CGData/CodeGenDataReader.h
• lib/CGData/CodeGenDataReader.cpp