llvm::MCSection Class Reference

Instances of this class represent a uniqued identifier for a section in the current translation unit. More...

#include "llvm/MC/MCSection.h"

Inheritance diagram for llvm::MCSection:

Classes
struct	FragList
struct	iterator

Public Types
enum	SectionVariant {   SV_COFF = 0 , SV_ELF , SV_GOFF , SV_MachO ,   SV_Wasm , SV_XCOFF , SV_SPIRV , SV_DXContainer }
enum	BundleLockStateType { NotBundleLocked , BundleLocked , BundleLockedAlignToEnd }
	Express the state of bundle locked groups while emitting code. More...

Public Member Functions
	MCSection (const MCSection &)=delete
MCSection &	operator= (const MCSection &)=delete
StringRef	getName () const
bool	isText () const
SectionVariant	getVariant () const
MCSymbol *	getBeginSymbol ()
const MCSymbol *	getBeginSymbol () const
void	setBeginSymbol (MCSymbol *Sym)
MCSymbol *	getEndSymbol (MCContext &Ctx)
bool	hasEnded () const
Align	getAlign () const
void	setAlignment (Align Value)
void	ensureMinAlignment (Align MinAlignment)
	Makes sure that Alignment is at least MinAlignment.
unsigned	getOrdinal () const
void	setOrdinal (unsigned Value)
BundleLockStateType	getBundleLockState () const
void	setBundleLockState (BundleLockStateType NewState)
bool	isBundleLocked () const
bool	isBundleGroupBeforeFirstInst () const
void	setBundleGroupBeforeFirstInst (bool IsFirst)
bool	hasInstructions () const
void	setHasInstructions (bool Value)
bool	hasLayout () const
void	setHasLayout (bool Value)
bool	isRegistered () const
void	setIsRegistered (bool Value)
const MCDummyFragment &	getDummyFragment () const
MCDummyFragment &	getDummyFragment ()
FragList *	curFragList () const
iterator	begin () const
iterator	end () const
void	dump () const
virtual void	printSwitchToSection (const MCAsmInfo &MAI, const Triple &T, raw_ostream &OS, uint32_t Subsection) const =0
virtual bool	useCodeAlign () const =0
	Return true if a .align directive should use "optimized nops" to fill instead of 0s.
bool	isVirtualSection () const
	Check whether this section is "virtual", that is has no actual object file contents.
virtual StringRef	getVirtualSectionKind () const

Public Attributes
friend	MCAssembler
friend	MCObjectStreamer

Static Public Attributes
static constexpr unsigned	NonUniqueID = ~0U

Protected Member Functions
	MCSection (SectionVariant V, StringRef Name, bool IsText, bool IsVirtual, MCSymbol *Begin)
	~MCSection ()

Protected Attributes
StringRef	Name
SectionVariant	Variant

Detailed Description

Instances of this class represent a uniqued identifier for a section in the current translation unit.

The MCContext class uniques and creates these.

Definition at line 36 of file MCSection.h.

Member Enumeration Documentation

BundleLockStateType

enum llvm::MCSection::BundleLockStateType

Express the state of bundle locked groups while emitting code.

Enumerator
NotBundleLocked
BundleLocked
BundleLockedAlignToEnd

Definition at line 54 of file MCSection.h.

SectionVariant

enum llvm::MCSection::SectionVariant

Enumerator
SV_COFF
SV_ELF
SV_GOFF
SV_MachO
SV_Wasm
SV_XCOFF
SV_SPIRV
SV_DXContainer

Definition at line 42 of file MCSection.h.

Constructor & Destructor Documentation

MCSection() [1/2]

MCSection::MCSection ( SectionVariant  V, StringRef  Name, bool  IsText, bool  IsVirtual, MCSymbol *  Begin  )

protected

Definition at line 22 of file MCSection.cpp.

References llvm::MCFragment::setParent().

~MCSection()

MCSection::~MCSection ( )

protected

Definition at line 40 of file MCSection.cpp.

References _, X, and Y.

MCSection() [2/2]

llvm::MCSection::MCSection ( const MCSection &  )

delete

Member Function Documentation

begin()

iterator llvm::MCSection::begin ( ) const

inline

Definition at line 182 of file MCSection.h.

References llvm::MCSection::FragList::Head.

Referenced by EmitUnwindCode(), and llvm::MachObjectWriter::writeObject().

curFragList()

FragList * llvm::MCSection::curFragList ( ) const

inline

Definition at line 181 of file MCSection.h.

Referenced by llvm::MCSectionMachO::allocAtoms(), and llvm::MCAssembler::getSectionAddressSize().

dump()

LLVM_DUMP_METHOD void MCSection::dump

(

)

const

Definition at line 71 of file MCSection.cpp.

References llvm::errs(), F, llvm::First, getName(), and OS.

Referenced by llvm::MCAssembler::dump().

end()

iterator llvm::MCSection::end ( ) const

inline

Definition at line 183 of file MCSection.h.

ensureMinAlignment()

void llvm::MCSection::ensureMinAlignment ( Align  MinAlignment )

inline

Makes sure that Alignment is at least MinAlignment.

Definition at line 150 of file MCSection.h.

Referenced by llvm::MCWinCOFFStreamer::emitCOFFSafeSEH(), llvm::MCWinCOFFStreamer::emitCOFFSymbolIndex(), llvm::AMDGPUAsmPrinter::emitFunctionBodyEnd(), llvm::MCObjectStreamer::emitValueToAlignment(), and llvm::MipsTargetELFStreamer::finish().

getAlign()

Align llvm::MCSection::getAlign ( ) const

inline

Definition at line 146 of file MCSection.h.

Referenced by addData(), getAlignment(), and llvm::MachObjectWriter::getPaddingSize().

getBeginSymbol() [1/2]

MCSymbol * llvm::MCSection::getBeginSymbol ( )

inline

Definition at line 135 of file MCSection.h.

Referenced by llvm::DwarfCompileUnit::addAddrTableBase(), llvm::DwarfUnit::addRnglistsBase(), llvm::DwarfCompileUnit::addScopeRangeList(), llvm::DwarfUnit::addStringOffsetsStart(), llvm::DwarfCompileUnit::applyStmtList(), llvm::MCContext::createELFRelSection(), llvm::DwarfUnit::emitCommonHeader(), llvm::MCObjectFileInfo::getBBAddrMapSection(), getBeginSymbol(), llvm::MCObjectFileInfo::getKCFITrapSection(), llvm::MCObjectFileInfo::getPCSection(), llvm::MCObjectFileInfo::getPseudoProbeSection(), llvm::MCObjectFileInfo::getStackSizesSection(), llvm::DwarfCompileUnit::initStmtList(), llvm::MCDwarfLineStr::MCDwarfLineStr(), llvm::ELFObjectWriter::recordRelocation(), llvm::LoongArchAsmBackend::shouldInsertFixupForCodeAlign(), and llvm::DwarfCompileUnit::updateSubprogramScopeDIE().

getBeginSymbol() [2/2]

const MCSymbol * llvm::MCSection::getBeginSymbol ( ) const

inline

Definition at line 136 of file MCSection.h.

References getBeginSymbol().

getBundleLockState()

BundleLockStateType llvm::MCSection::getBundleLockState ( ) const

inline

Definition at line 158 of file MCSection.h.

getDummyFragment() [1/2]

MCDummyFragment & llvm::MCSection::getDummyFragment ( )

inline

Definition at line 179 of file MCSection.h.

getDummyFragment() [2/2]

const MCDummyFragment & llvm::MCSection::getDummyFragment ( ) const

inline

Definition at line 178 of file MCSection.h.

getEndSymbol()

MCSymbol * MCSection::getEndSymbol

(

MCContext &

Ctx

)

Definition at line 32 of file MCSection.cpp.

References llvm::MCContext::createTempSymbol().

getName()

StringRef llvm::MCSection::getName ( ) const

inline

Definition at line 130 of file MCSection.h.

References Name.

Referenced by addData(), llvm::BTFDebug::beginFunctionImpl(), canUseLocalRelocation(), dump(), llvm::MCObjectStreamer::emitInstruction(), llvm::MCContext::getAssociativeCOFFSection(), llvm::MCObjectFileInfo::getPseudoProbeSection(), llvm::TargetLoweringObjectFileELF::getSectionForMachineBasicBlock(), isDwoSection(), llvm::MCAsmInfoDarwin::isSectionAtomizableBySymbols(), llvm::MCSectionCOFF::printSwitchToSection(), llvm::MCSectionELF::printSwitchToSection(), llvm::MCSectionMachO::printSwitchToSection(), llvm::MCSectionWasm::printSwitchToSection(), llvm::MCSectionXCOFF::printSwitchToSection(), llvm::MCSectionGOFF::printSwitchToSection(), llvm::XtensaTargetELFStreamer::startLiteralSection(), and llvm::WinCOFFWriter::writeObject().

getOrdinal()

unsigned llvm::MCSection::getOrdinal ( ) const

inline

Definition at line 155 of file MCSection.h.

getVariant()

SectionVariant llvm::MCSection::getVariant ( ) const

inline

Definition at line 133 of file MCSection.h.

References Variant.

Referenced by llvm::MCSectionCOFF::classof(), llvm::MCSectionELF::classof(), llvm::MCSectionGOFF::classof(), llvm::MCSectionMachO::classof(), llvm::MCSectionWasm::classof(), and llvm::MCSectionXCOFF::classof().

getVirtualSectionKind()

StringRef MCSection::getVirtualSectionKind ( ) const

virtual

Reimplemented in llvm::MCSectionCOFF, and llvm::MCSectionELF.

Definition at line 68 of file MCSection.cpp.

Referenced by llvm::MCObjectStreamer::emitInstruction().

hasEnded()

bool MCSection::hasEnded

(

)

const

Definition at line 38 of file MCSection.cpp.

References llvm::MCSymbol::isInSection().

hasInstructions()

bool llvm::MCSection::hasInstructions ( ) const

inline

Definition at line 169 of file MCSection.h.

Referenced by AttemptToFoldSymbolOffsetDifference(), and llvm::MCObjectStreamer::mayHaveInstructions().

hasLayout()

bool llvm::MCSection::hasLayout ( ) const

inline

Definition at line 172 of file MCSection.h.

Referenced by llvm::MCAssembler::ensureValid().

isBundleGroupBeforeFirstInst()

bool llvm::MCSection::isBundleGroupBeforeFirstInst ( ) const

inline

Definition at line 162 of file MCSection.h.

Referenced by llvm::MCELFStreamer::emitBundleUnlock().

isBundleLocked()

bool llvm::MCSection::isBundleLocked ( ) const

inline

Definition at line 160 of file MCSection.h.

References NotBundleLocked.

isRegistered()

bool llvm::MCSection::isRegistered ( ) const

inline

Definition at line 175 of file MCSection.h.

Referenced by llvm::AArch64TargetStreamer::emitNoteSection().

isText()

bool llvm::MCSection::isText ( ) const

inline

Definition at line 131 of file MCSection.h.

Referenced by llvm::MCSectionXCOFF::printSwitchToSection(), and llvm::MCSectionCOFF::useCodeAlign().

isVirtualSection()

bool llvm::MCSection::isVirtualSection ( ) const

inline

Check whether this section is "virtual", that is has no actual object file contents.

Definition at line 197 of file MCSection.h.

Referenced by llvm::AsmPrinter::emitGlobalVariable(), llvm::MCObjectStreamer::emitInstruction(), llvm::MachObjectWriter::getPaddingSize(), llvm::MCAssembler::getSectionFileSize(), and llvm::MCAssembler::writeSectionData().

operator=()

MCSection & llvm::MCSection::operator= ( const MCSection &  )

delete

printSwitchToSection()

virtual void llvm::MCSection::printSwitchToSection ( const MCAsmInfo &  MAI, const Triple &  T, raw_ostream &  OS, uint32_t  Subsection  ) const

pure virtual

Implemented in llvm::MCSectionDXContainer, llvm::MCSectionCOFF, llvm::MCSectionELF, llvm::MCSectionMachO, llvm::MCSectionSPIRV, llvm::MCSectionWasm, llvm::MCSectionXCOFF, and llvm::MCSectionGOFF.

setAlignment()

void llvm::MCSection::setAlignment ( Align  Value )

inline

Definition at line 147 of file MCSection.h.

Referenced by llvm::MipsTargetELFStreamer::emitDirectiveEnd(), llvm::MipsTargetELFStreamer::emitMipsAbiFlags(), llvm::MipsRegInfoRecord::EmitMipsOptionRecord(), llvm::dwarf_linker::classic::DwarfStreamer::emitSwiftAST(), llvm::dwarf_linker::classic::DwarfStreamer::emitSwiftReflectionSection(), and llvm::XtensaTargetELFStreamer::startLiteralSection().

setBeginSymbol()

void llvm::MCSection::setBeginSymbol ( MCSymbol *  Sym )

inline

Definition at line 139 of file MCSection.h.

References assert(), and Sym.

setBundleGroupBeforeFirstInst()

void llvm::MCSection::setBundleGroupBeforeFirstInst ( bool  IsFirst )

inline

Definition at line 165 of file MCSection.h.

Referenced by llvm::MCELFStreamer::emitBundleLock().

setBundleLockState()

void MCSection::setBundleLockState

(

BundleLockStateType

NewState

)

Definition at line 49 of file MCSection.cpp.

References BundleLockedAlignToEnd, NotBundleLocked, and llvm::report_fatal_error().

Referenced by llvm::MCELFStreamer::emitBundleLock(), and llvm::MCELFStreamer::emitBundleUnlock().

setHasInstructions()

void llvm::MCSection::setHasInstructions ( bool  Value )

inline

Definition at line 170 of file MCSection.h.

setHasLayout()

void llvm::MCSection::setHasLayout ( bool  Value )

inline

Definition at line 173 of file MCSection.h.

Referenced by llvm::MCAssembler::ensureValid(), and llvm::MCAssembler::layout().

setIsRegistered()

void llvm::MCSection::setIsRegistered ( bool  Value )

inline

Definition at line 176 of file MCSection.h.

setOrdinal()

void llvm::MCSection::setOrdinal ( unsigned  Value )

inline

Definition at line 156 of file MCSection.h.

Referenced by llvm::MCAssembler::layout().

useCodeAlign()

virtual bool llvm::MCSection::useCodeAlign ( ) const

pure virtual

Return true if a .align directive should use "optimized nops" to fill instead of 0s.

Implemented in llvm::MCSectionCOFF, llvm::MCSectionDXContainer, llvm::MCSectionELF, llvm::MCSectionGOFF, llvm::MCSectionMachO, llvm::MCSectionSPIRV, llvm::MCSectionWasm, and llvm::MCSectionXCOFF.

Referenced by llvm::MCAssembler::computeFragmentSize().

Member Data Documentation

MCAssembler

friend llvm::MCSection::MCAssembler

Definition at line 38 of file MCSection.h.

MCObjectStreamer

friend llvm::MCSection::MCObjectStreamer

Definition at line 39 of file MCSection.h.

Name

StringRef llvm::MCSection::Name

protected

Definition at line 119 of file MCSection.h.

Referenced by getName(), llvm::MCSectionCOFF::isImplicitlyDiscardable(), llvm::MCSectionCOFF::shouldOmitSectionDirective(), llvm::MCSectionELF::shouldOmitSectionDirective(), and llvm::MCSectionWasm::shouldOmitSectionDirective().

NonUniqueID

constexpr unsigned llvm::MCSection::NonUniqueID = ~0U

staticconstexpr

Definition at line 40 of file MCSection.h.

Referenced by llvm::MCContext::createELFGroupSection(), llvm::AsmPrinter::emitPatchableFunctionEntries(), llvm::AsmPrinter::emitXRayTable(), llvm::MCContext::getELFSection(), llvm::TargetLoweringObjectFileELF::getSectionForLSDA(), and llvm::MCSectionELF::isUnique().

Variant

SectionVariant llvm::MCSection::Variant

protected

Definition at line 120 of file MCSection.h.

Referenced by getVariant().

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

• include/llvm/MC/MCSection.h
• lib/MC/MCSection.cpp