Information gathered about source DIEs. More...

#include "DWARFLinker/Parallel/DWARFLinkerCompileUnit.h"

Public Member Functions
	DIEInfo ()=default
	DIEInfo (const DIEInfo &Other)
DIEInfo &	operator= (const DIEInfo &Other)
DieOutputPlacement	getPlacement () const
void	setPlacement (DieOutputPlacement Placement)
	Sets Placement kind for the corresponding die.
void	unsetPlacement ()
	Unsets Placement kind for the corresponding die.
bool	setPlacementIfUnset (DieOutputPlacement Placement)
	Sets Placement kind for the corresponding die.
void	joinPlacement (DieOutputPlacement Placement)
	Atomically joins `Placement` into the current placement: the least-upper-bound of the lattice NotSet < {TypeTable, PlainDwarf} < Both, which is a plain OR because the values are bit flags.
void	joinVariablePlacement (DieOutputPlacement Placement)
	Atomically joins `Placement` for a DW_TAG_variable, for which PlainDwarf is absorbing because a variable cannot occupy the type table and plain DWARF at once.
void	unsetFlagsWhichSetDuringLiveAnalysis ()
	DIE is a part of the linked output.
void	eraseData ()
	Erase all flags.
LLVM_DUMP_METHOD void	dump ()
bool	needToPlaceInTypeTable () const
bool	needToKeepInPlainDwarf () const

Public Attributes
std::atomic< uint16_t >	Flags = {0}
	Data member keeping various flags.

Detailed Description

Information gathered about source DIEs.

Definition at line 182 of file DWARFLinkerCompileUnit.h.

Constructor & Destructor Documentation

◆ DIEInfo() [1/2]

llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::DIEInfo ( )

default

Referenced by DIEInfo(), and operator=().

◆ DIEInfo() [2/2]

llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::DIEInfo ( const DIEInfo & Other )

inline

Definition at line 184 of file DWARFLinkerCompileUnit.h.

References DIEInfo(), Flags, and llvm::Other.

Member Function Documentation

◆ dump()

LLVM_DUMP_METHOD void llvm::CompileUnit::DIEInfo::dump ( )

Definition at line 22 of file DWARFLinkerCompileUnit.cpp.

References llvm::errs(), llvm::formatv(), llvm::Keep, and LLVM_DUMP_METHOD.

◆ eraseData()

void llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::eraseData ( )

inline

Erase all flags.

Definition at line 301 of file DWARFLinkerCompileUnit.h.

References Flags.

◆ getPlacement()

DieOutputPlacement llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::getPlacement ( ) const

inline

Returns: Placement kind for the corresponding die.

Definition at line 194 of file DWARFLinkerCompileUnit.h.

References Flags.

Referenced by llvm::dwarf_linker::classic::CompileUnit::DIEInfo::dump(), needToKeepInPlainDwarf(), and needToPlaceInTypeTable().

◆ joinPlacement()

void llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::joinPlacement ( DieOutputPlacement Placement )

inline

Atomically joins Placement into the current placement: the least-upper-bound of the lattice NotSet < {TypeTable, PlainDwarf} < Both, which is a plain OR because the values are bit flags.

The join is monotone and never clears a bit, so unlike setPlacement it composes correctly when applied concurrently from several marks.

Definition at line 228 of file DWARFLinkerCompileUnit.h.

References Flags, and Placement.

◆ joinVariablePlacement()

void llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::joinVariablePlacement ( DieOutputPlacement Placement )

inline

Atomically joins Placement for a DW_TAG_variable, for which PlainDwarf is absorbing because a variable cannot occupy the type table and plain DWARF at once.

Once the placement is (or concurrently becomes) PlainDwarf it stays PlainDwarf, otherwise Placement is OR-joined. Recomputing inside the compare_exchange loop keeps a racing PlainDwarf mark from turning the variable into Both.

Definition at line 240 of file DWARFLinkerCompileUnit.h.

References llvm::dwarf_linker::parallel::CompileUnit::Both, Flags, Placement, and llvm::dwarf_linker::parallel::CompileUnit::PlainDwarf.

◆ needToKeepInPlainDwarf()

bool llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::needToKeepInPlainDwarf ( ) const

inline

Definition at line 313 of file DWARFLinkerCompileUnit.h.

References llvm::dwarf_linker::parallel::CompileUnit::Both, getPlacement(), and llvm::dwarf_linker::parallel::CompileUnit::PlainDwarf.

Referenced by llvm::dwarf_linker::parallel::DependencyTracker::verifyKeepChain().

◆ needToPlaceInTypeTable()

bool llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::needToPlaceInTypeTable ( ) const

inline

Definition at line 307 of file DWARFLinkerCompileUnit.h.

References llvm::dwarf_linker::parallel::CompileUnit::Both, getPlacement(), and llvm::dwarf_linker::parallel::CompileUnit::TypeTable.

Referenced by llvm::dwarf_linker::parallel::DIEAttributeCloner::cloneDieRefAttr(), llvm::dwarf_linker::parallel::DependencyTracker::markParentsAsKeepingChildren(), llvm::dwarf_linker::parallel::DependencyTracker::updateDependenciesCompleteness(), and llvm::dwarf_linker::parallel::DependencyTracker::verifyKeepChain().

◆ operator=()

DIEInfo & llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::operator= ( const DIEInfo & Other )

inline

Definition at line 185 of file DWARFLinkerCompileUnit.h.

References DIEInfo(), Flags, and llvm::Other.

◆ setPlacement()

void llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::setPlacement ( DieOutputPlacement Placement )

inline

Sets Placement kind for the corresponding die.

Definition at line 199 of file DWARFLinkerCompileUnit.h.

References Flags, and Placement.

Referenced by llvm::dwarf_linker::parallel::DependencyTracker::resolveDependenciesAndMarkLiveness(), and llvm::dwarf_linker::parallel::DependencyTracker::setPlainDwarfPlacementRec().

◆ setPlacementIfUnset()

bool llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::setPlacementIfUnset ( DieOutputPlacement Placement )

inline

Sets Placement kind for the corresponding die.

Definition at line 214 of file DWARFLinkerCompileUnit.h.

References Flags, llvm::dwarf_linker::parallel::CompileUnit::NotSet, and Placement.

◆ unsetFlagsWhichSetDuringLiveAnalysis()

void llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::unsetFlagsWhichSetDuringLiveAnalysis ( )

inline

DIE is a part of the linked output.

DIE has children which are part of the linked output. DIE has children which are part of the type table. DIE is in module scope. DIE is in function scope. DIE is in anonymous namespace scope. DIE is available for ODR type deduplication. Track liveness for the DIE. Track liveness for the DIE.

Definition at line 293 of file DWARFLinkerCompileUnit.h.

References Flags, and unsetFlagsWhichSetDuringLiveAnalysis().

Referenced by unsetFlagsWhichSetDuringLiveAnalysis().

◆ unsetPlacement()

void llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::unsetPlacement ( )

inline

Unsets Placement kind for the corresponding die.

Definition at line 207 of file DWARFLinkerCompileUnit.h.

References Flags.

Member Data Documentation

◆ Flags

std::atomic<uint16_t> llvm::dwarf_linker::parallel::CompileUnit::DIEInfo::Flags = {0}

Data member keeping various flags.

Definition at line 191 of file DWARFLinkerCompileUnit.h.

Referenced by DIEInfo(), eraseData(), getPlacement(), joinPlacement(), joinVariablePlacement(), operator=(), setPlacement(), setPlacementIfUnset(), unsetFlagsWhichSetDuringLiveAnalysis(), and unsetPlacement().

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

lib/DWARFLinker/Parallel/DWARFLinkerCompileUnit.h
lib/DWARFLinker/Classic/DWARFLinkerCompileUnit.cpp

Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ DIEInfo() [1/2]

◆ DIEInfo() [2/2]

Member Function Documentation

◆ dump()

◆ eraseData()

◆ getPlacement()

◆ joinPlacement()

◆ joinVariablePlacement()

◆ needToKeepInPlainDwarf()

◆ needToPlaceInTypeTable()

◆ operator=()

◆ setPlacement()

◆ setPlacementIfUnset()

◆ unsetFlagsWhichSetDuringLiveAnalysis()

◆ unsetPlacement()

Member Data Documentation

◆ Flags