llvm::TargetSubtargetInfo Class Reference

TargetSubtargetInfo - Generic base class for all target subtargets. More...

#include "llvm/CodeGen/TargetSubtargetInfo.h"

Inheritance diagram for llvm::TargetSubtargetInfo:

Public Types
using	AntiDepBreakMode = enum { ANTIDEP_NONE, ANTIDEP_CRITICAL, ANTIDEP_ALL }
using	RegClassVector = SmallVectorImpl<const TargetRegisterClass *>
Public Types inherited from llvm::MCSubtargetInfo
enum	HwModeType { HwMode_Default , HwMode_ValueType , HwMode_RegInfo , HwMode_EncodingInfo }
	HwMode IDs are stored and accessed in a bit set format, enabling users to efficiently retrieve specific IDs, such as the RegInfo HwMode ID, from the set as required. More...

Public Member Functions
	TargetSubtargetInfo ()=delete
	TargetSubtargetInfo (const TargetSubtargetInfo &)=delete
TargetSubtargetInfo &	operator= (const TargetSubtargetInfo &)=delete
	~TargetSubtargetInfo () override
virtual bool	isXRaySupported () const
virtual const TargetInstrInfo *	getInstrInfo () const
virtual const TargetFrameLowering *	getFrameLowering () const
virtual const TargetLowering *	getTargetLowering () const
virtual const SelectionDAGTargetInfo *	getSelectionDAGInfo () const
virtual const CallLowering *	getCallLowering () const
virtual const InlineAsmLowering *	getInlineAsmLowering () const
virtual InstructionSelector *	getInstructionSelector () const
virtual RegisterScheduler::FunctionPassCtor	getDAGScheduler (CodeGenOptLevel) const
	Target can subclass this hook to select a different DAG scheduler.
virtual const LegalizerInfo *	getLegalizerInfo () const
virtual const TargetRegisterInfo *	getRegisterInfo () const =0
	Return the target's register information.
virtual const RegisterBankInfo *	getRegBankInfo () const
	If the information for the register banks is available, return it.
virtual const InstrItineraryData *	getInstrItineraryData () const
	getInstrItineraryData - Returns instruction itinerary data for the target or specific subtarget.
virtual unsigned	resolveSchedClass (unsigned SchedClass, const MachineInstr *MI, const TargetSchedModel *SchedModel) const
	Resolve a SchedClass at runtime, where SchedClass identifies an MCSchedClassDesc with the isVariant property.
virtual bool	isZeroIdiom (const MachineInstr *MI, APInt &Mask) const
	Returns true if MI is a dependency breaking zero-idiom instruction for the subtarget.
virtual bool	isDependencyBreaking (const MachineInstr *MI, APInt &Mask) const
	Returns true if MI is a dependency breaking instruction for the subtarget.
virtual bool	isOptimizableRegisterMove (const MachineInstr *MI) const
	Returns true if MI is a candidate for move elimination.
virtual bool	enableMachineScheduler () const
	True if the subtarget should run MachineScheduler after aggressive coalescing.
virtual bool	enableMachineSchedDefaultSched () const
	True if the machine scheduler should disable the TLI preference for preRA scheduling with the source level scheduler.
virtual bool	enableMachinePipeliner () const
	True if the subtarget should run MachinePipeliner.
virtual bool	enableWindowScheduler () const
	True if the subtarget should run WindowScheduler.
virtual bool	enableJoinGlobalCopies () const
	True if the subtarget should enable joining global copies.
virtual bool	enablePostRAScheduler () const
	True if the subtarget should run a scheduler after register allocation.
virtual bool	enablePostRAMachineScheduler () const
	True if the subtarget should run a machine scheduler after register allocation.
virtual bool	enableAtomicExpand () const
	True if the subtarget should run the atomic expansion pass.
virtual bool	enableIndirectBrExpand () const
	True if the subtarget should run the indirectbr expansion pass.
virtual void	overrideSchedPolicy (MachineSchedPolicy &Policy, const SchedRegion &Region) const
	Override generic scheduling policy within a region.
virtual void	overridePostRASchedPolicy (MachineSchedPolicy &Policy, const SchedRegion &Region) const
	Override generic post-ra scheduling policy within a region.
virtual void	adjustSchedDependency (SUnit *Def, int DefOpIdx, SUnit *Use, int UseOpIdx, SDep &Dep, const TargetSchedModel *SchedModel) const
virtual AntiDepBreakMode	getAntiDepBreakMode () const
virtual void	getCriticalPathRCs (RegClassVector &CriticalPathRCs) const
virtual void	getPostRAMutations (std::vector< std::unique_ptr< ScheduleDAGMutation > > &Mutations) const
virtual void	getSMSMutations (std::vector< std::unique_ptr< ScheduleDAGMutation > > &Mutations) const
virtual bool	useDFAforSMS () const
	Default to DFA for resource management, return false when target will use ProcResource in InstrSchedModel instead.
virtual CodeGenOptLevel	getOptLevelToEnablePostRAScheduler () const
virtual bool	enableRALocalReassignment (CodeGenOptLevel OptLevel) const
	True if the subtarget should run the local reassignment heuristic of the register allocator.
virtual bool	useAA () const
	Enable use of alias analysis during code generation (during MI scheduling, DAGCombine, etc.).
virtual bool	addrSinkUsingGEPs () const
	Sink addresses into blocks using GEP instructions rather than pointer casts and arithmetic.
virtual bool	enableEarlyIfConversion () const
	Enable the use of the early if conversion pass.
virtual std::unique_ptr< PBQPRAConstraint >	getCustomPBQPConstraints () const
	Return PBQPConstraint(s) for the target.
virtual bool	enableSubRegLiveness () const
	Enable tracking of subregister liveness in register allocator.
virtual void	mirFileLoaded (MachineFunction &MF) const
	This is called after a .mir file was loaded.
virtual bool	ignoreCSRForAllocationOrder (const MachineFunction &MF, MCRegister PhysReg) const
	True if the register allocator should use the allocation orders exactly as written in the tablegen descriptions, false if it should allocate the specified physical register later if is it callee-saved.
virtual unsigned char	classifyGlobalFunctionReference (const GlobalValue *GV) const
	Classify a global function reference.
virtual bool	enableSpillageCopyElimination () const
	Enable spillage copy elimination in MachineCopyPropagation pass.
virtual std::vector< MacroFusionPredTy >	getMacroFusions () const
	Get the list of MacroFusion predicates.
virtual bool	requiresDisjointEarlyClobberAndUndef () const
	Whether the target has instructions where an early-clobber result operand cannot overlap with an undef input operand.
virtual bool	isRegisterReservedByUser (Register R) const
Public Member Functions inherited from llvm::MCSubtargetInfo
	MCSubtargetInfo (const MCSubtargetInfo &)=default
	MCSubtargetInfo (const Triple &TT, StringRef CPU, StringRef TuneCPU, StringRef FS, ArrayRef< StringRef > PN, ArrayRef< SubtargetFeatureKV > PF, ArrayRef< SubtargetSubTypeKV > PD, const MCWriteProcResEntry *WPR, const MCWriteLatencyEntry *WL, const MCReadAdvanceEntry *RA, const InstrStage *IS, const unsigned *OC, const unsigned *FP)
	MCSubtargetInfo ()=delete
MCSubtargetInfo &	operator= (const MCSubtargetInfo &)=delete
MCSubtargetInfo &	operator= (MCSubtargetInfo &&)=delete
virtual	~MCSubtargetInfo ()=default
const Triple &	getTargetTriple () const
StringRef	getCPU () const
StringRef	getTuneCPU () const
const FeatureBitset &	getFeatureBits () const
void	setFeatureBits (const FeatureBitset &FeatureBits_)
StringRef	getFeatureString () const
bool	hasFeature (unsigned Feature) const
void	setDefaultFeatures (StringRef CPU, StringRef TuneCPU, StringRef FS)
	Set the features to the default for the given CPU and TuneCPU, with ano appended feature string.
FeatureBitset	ToggleFeature (uint64_t FB)
	Toggle a feature and return the re-computed feature bits.
FeatureBitset	ToggleFeature (const FeatureBitset &FB)
	Toggle a feature and return the re-computed feature bits.
FeatureBitset	ToggleFeature (StringRef FS)
	Toggle a set of features and return the re-computed feature bits.
FeatureBitset	ApplyFeatureFlag (StringRef FS)
	Apply a feature flag and return the re-computed feature bits, including all feature bits implied by the flag.
FeatureBitset	SetFeatureBitsTransitively (const FeatureBitset &FB)
	Set/clear additional feature bits, including all other bits they imply.
FeatureBitset	ClearFeatureBitsTransitively (const FeatureBitset &FB)
bool	checkFeatures (StringRef FS) const
	Check whether the subtarget features are enabled/disabled as per the provided string, ignoring all other features.
const MCSchedModel &	getSchedModelForCPU (StringRef CPU) const
	Get the machine model of a CPU.
const MCSchedModel &	getSchedModel () const
	Get the machine model for this subtarget's CPU.
const MCWriteProcResEntry *	getWriteProcResBegin (const MCSchedClassDesc *SC) const
	Return an iterator at the first process resource consumed by the given scheduling class.
const MCWriteProcResEntry *	getWriteProcResEnd (const MCSchedClassDesc *SC) const
const MCWriteLatencyEntry *	getWriteLatencyEntry (const MCSchedClassDesc *SC, unsigned DefIdx) const
int	getReadAdvanceCycles (const MCSchedClassDesc *SC, unsigned UseIdx, unsigned WriteResID) const
ArrayRef< MCReadAdvanceEntry >	getReadAdvanceEntries (const MCSchedClassDesc &SC) const
	Return the set of ReadAdvance entries declared by the scheduling class descriptor in input.
InstrItineraryData	getInstrItineraryForCPU (StringRef CPU) const
	Get scheduling itinerary of a CPU.
void	initInstrItins (InstrItineraryData &InstrItins) const
	Initialize an InstrItineraryData instance.
virtual unsigned	resolveVariantSchedClass (unsigned SchedClass, const MCInst *MI, const MCInstrInfo *MCII, unsigned CPUID) const
	Resolve a variant scheduling class for the given MCInst and CPU.
virtual bool	isCPUStringValid (StringRef CPU) const
	Check whether the CPU string is valid.
ArrayRef< SubtargetSubTypeKV >	getAllProcessorDescriptions () const
	Return processor descriptions.
ArrayRef< SubtargetFeatureKV >	getAllProcessorFeatures () const
	Return processor features.
std::vector< SubtargetFeatureKV >	getEnabledProcessorFeatures () const
	Return the list of processor features currently enabled.
virtual unsigned	getHwModeSet () const
	Return a bit set containing all HwMode IDs of the current subtarget.
virtual unsigned	getHwMode (enum HwModeType type=HwMode_Default) const
	HwMode ID corresponding to the 'type' parameter is retrieved from the HwMode bit set of the current subtarget.
virtual std::optional< unsigned >	getCacheSize (unsigned Level) const
	Return the cache size in bytes for the given level of cache.
virtual std::optional< unsigned >	getCacheAssociativity (unsigned Level) const
	Return the cache associatvity for the given level of cache.
virtual std::optional< unsigned >	getCacheLineSize (unsigned Level) const
	Return the target cache line size in bytes at a given level.
virtual unsigned	getCacheLineSize () const
	Return the target cache line size in bytes.
virtual unsigned	getPrefetchDistance () const
	Return the preferred prefetch distance in terms of instructions.
virtual unsigned	getMaxPrefetchIterationsAhead () const
	Return the maximum prefetch distance in terms of loop iterations.
virtual bool	enableWritePrefetching () const
virtual unsigned	getMinPrefetchStride (unsigned NumMemAccesses, unsigned NumStridedMemAccesses, unsigned NumPrefetches, bool HasCall) const
	Return the minimum stride necessary to trigger software prefetching.
virtual bool	shouldPrefetchAddressSpace (unsigned AS) const

Protected Member Functions
	TargetSubtargetInfo (const Triple &TT, StringRef CPU, StringRef TuneCPU, StringRef FS, ArrayRef< StringRef > PN, ArrayRef< SubtargetFeatureKV > PF, ArrayRef< SubtargetSubTypeKV > PD, const MCWriteProcResEntry *WPR, const MCWriteLatencyEntry *WL, const MCReadAdvanceEntry *RA, const InstrStage *IS, const unsigned *OC, const unsigned *FP)
Protected Member Functions inherited from llvm::MCSubtargetInfo
void	InitMCProcessorInfo (StringRef CPU, StringRef TuneCPU, StringRef FS)
	Initialize the scheduling model and feature bits.

Detailed Description

TargetSubtargetInfo - Generic base class for all target subtargets.

All Target-specific options that control code generation and printing should be exposed through a TargetSubtargetInfo-derived class.

Definition at line 65 of file TargetSubtargetInfo.h.

Member Typedef Documentation

AntiDepBreakMode

using llvm::TargetSubtargetInfo::AntiDepBreakMode = enum { ANTIDEP_NONE, ANTIDEP_CRITICAL, ANTIDEP_ALL }

Definition at line 79 of file TargetSubtargetInfo.h.

RegClassVector

using llvm::TargetSubtargetInfo::RegClassVector = SmallVectorImpl<const TargetRegisterClass *>

Definition at line 80 of file TargetSubtargetInfo.h.

Constructor & Destructor Documentation

TargetSubtargetInfo() [1/3]

TargetSubtargetInfo::TargetSubtargetInfo ( const Triple & TT, StringRef CPU, StringRef TuneCPU, StringRef FS, ArrayRef< StringRef > PN, ArrayRef< SubtargetFeatureKV > PF, ArrayRef< SubtargetSubTypeKV > PD, const MCWriteProcResEntry * WPR, const MCWriteLatencyEntry * WL, const MCReadAdvanceEntry * RA, const InstrStage * IS, const unsigned * OC, const unsigned * FP )

protected

Definition at line 17 of file TargetSubtargetInfo.cpp.

References FP, llvm::MCSubtargetInfo::MCSubtargetInfo(), and RA.

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

TargetSubtargetInfo() [2/3]

llvm::TargetSubtargetInfo::TargetSubtargetInfo ( )

delete

TargetSubtargetInfo() [3/3]

llvm::TargetSubtargetInfo::TargetSubtargetInfo ( const TargetSubtargetInfo & )

delete

References TargetSubtargetInfo().

~TargetSubtargetInfo()

TargetSubtargetInfo::~TargetSubtargetInfo ( )

overridedefault

Member Function Documentation

addrSinkUsingGEPs()

virtual bool llvm::TargetSubtargetInfo::addrSinkUsingGEPs ( ) const

inlinevirtual

Sink addresses into blocks using GEP instructions rather than pointer casts and arithmetic.

Definition at line 302 of file TargetSubtargetInfo.h.

References useAA().

adjustSchedDependency()

virtual void llvm::TargetSubtargetInfo::adjustSchedDependency ( SUnit * Def, int DefOpIdx, SUnit * Use, int UseOpIdx, SDep & Dep, const TargetSchedModel * SchedModel ) const

inlinevirtual

Definition at line 252 of file TargetSubtargetInfo.h.

classifyGlobalFunctionReference()

virtual unsigned char llvm::TargetSubtargetInfo::classifyGlobalFunctionReference ( const GlobalValue * GV ) const

inlinevirtual

Classify a global function reference.

This mainly used to fetch target special flags for lowering a function address. For example mark a function call should be plt or pc-related addressing.

Definition at line 336 of file TargetSubtargetInfo.h.

enableAtomicExpand()

bool TargetSubtargetInfo::enableAtomicExpand ( ) const

virtual

True if the subtarget should run the atomic expansion pass.

Definition at line 28 of file TargetSubtargetInfo.cpp.

enableEarlyIfConversion()

virtual bool llvm::TargetSubtargetInfo::enableEarlyIfConversion ( ) const

inlinevirtual

Enable the use of the early if conversion pass.

Definition at line 307 of file TargetSubtargetInfo.h.

enableIndirectBrExpand()

bool TargetSubtargetInfo::enableIndirectBrExpand ( ) const

virtual

True if the subtarget should run the indirectbr expansion pass.

Definition at line 32 of file TargetSubtargetInfo.cpp.

enableJoinGlobalCopies()

bool TargetSubtargetInfo::enableJoinGlobalCopies ( ) const

virtual

True if the subtarget should enable joining global copies.

By default this is enabled if the machine scheduler is enabled, but can be overridden.

Definition at line 40 of file TargetSubtargetInfo.cpp.

References enableMachineScheduler().

enableMachinePipeliner()

virtual bool llvm::TargetSubtargetInfo::enableMachinePipeliner ( ) const

inlinevirtual

True if the subtarget should run MachinePipeliner.

Definition at line 202 of file TargetSubtargetInfo.h.

Referenced by llvm::MachinePipeliner::runOnMachineFunction().

enableMachineSchedDefaultSched()

virtual bool llvm::TargetSubtargetInfo::enableMachineSchedDefaultSched ( ) const

inlinevirtual

True if the machine scheduler should disable the TLI preference for preRA scheduling with the source level scheduler.

Definition at line 199 of file TargetSubtargetInfo.h.

enableMachineScheduler()

bool TargetSubtargetInfo::enableMachineScheduler ( ) const

virtual

True if the subtarget should run MachineScheduler after aggressive coalescing.

This currently replaces the SelectionDAG scheduler with the "source" order scheduler (though see below for an option to turn this off and use the TargetLowering preference). It does not yet disable the postRA scheduler.

Definition at line 36 of file TargetSubtargetInfo.cpp.

Referenced by enableJoinGlobalCopies(), enablePostRAMachineScheduler(), and llvm::MachineSchedulerPass::run().

enablePostRAMachineScheduler()

bool TargetSubtargetInfo::enablePostRAMachineScheduler ( ) const

virtual

True if the subtarget should run a machine scheduler after register allocation.

Definition at line 53 of file TargetSubtargetInfo.cpp.

References enableMachineScheduler(), and enablePostRAScheduler().

Referenced by llvm::PostMachineSchedulerPass::run().

enablePostRAScheduler()

bool TargetSubtargetInfo::enablePostRAScheduler ( ) const

virtual

True if the subtarget should run a scheduler after register allocation.

By default this queries the PostRAScheduling bit in the scheduling model which is the preferred way to influence this.

Definition at line 49 of file TargetSubtargetInfo.cpp.

References llvm::MCSubtargetInfo::getSchedModel(), and llvm::MCSchedModel::PostRAScheduler.

Referenced by enablePostRAMachineScheduler().

enableRALocalReassignment()

bool TargetSubtargetInfo::enableRALocalReassignment ( CodeGenOptLevel OptLevel ) const

virtual

True if the subtarget should run the local reassignment heuristic of the register allocator.

This heuristic may be compile time intensive, OptLevel provides a finer grain to tune the register allocator.

Definition at line 44 of file TargetSubtargetInfo.cpp.

enableSpillageCopyElimination()

virtual bool llvm::TargetSubtargetInfo::enableSpillageCopyElimination ( ) const

inlinevirtual

Enable spillage copy elimination in MachineCopyPropagation pass.

This helps removing redundant copies generated by register allocator when handling complex eviction chains.

Definition at line 343 of file TargetSubtargetInfo.h.

enableSubRegLiveness()

virtual bool llvm::TargetSubtargetInfo::enableSubRegLiveness ( ) const

inlinevirtual

Enable tracking of subregister liveness in register allocator.

Please use MachineRegisterInfo::subRegLivenessEnabled() instead where possible.

Definition at line 319 of file TargetSubtargetInfo.h.

enableWindowScheduler()

virtual bool llvm::TargetSubtargetInfo::enableWindowScheduler ( ) const

inlinevirtual

True if the subtarget should run WindowScheduler.

Definition at line 205 of file TargetSubtargetInfo.h.

getAntiDepBreakMode()

virtual AntiDepBreakMode llvm::TargetSubtargetInfo::getAntiDepBreakMode ( ) const

inlinevirtual

Definition at line 259 of file TargetSubtargetInfo.h.

getCallLowering()

virtual const CallLowering * llvm::TargetSubtargetInfo::getCallLowering ( ) const

inlinevirtual

Definition at line 107 of file TargetSubtargetInfo.h.

Referenced by createAtomicLibcall(), llvm::createLibcall(), and llvm::createMemLibcall().

getCriticalPathRCs()

virtual void llvm::TargetSubtargetInfo::getCriticalPathRCs ( RegClassVector & CriticalPathRCs ) const

inlinevirtual

Definition at line 264 of file TargetSubtargetInfo.h.

References llvm::SmallVectorImpl< T >::clear().

getCustomPBQPConstraints()

virtual std::unique_ptr< PBQPRAConstraint > llvm::TargetSubtargetInfo::getCustomPBQPConstraints ( ) const

inlinevirtual

Return PBQPConstraint(s) for the target.

Override to provide custom PBQP constraints.

Definition at line 312 of file TargetSubtargetInfo.h.

getDAGScheduler()

virtual RegisterScheduler::FunctionPassCtor llvm::TargetSubtargetInfo::getDAGScheduler ( CodeGenOptLevel ) const

inlinevirtual

Target can subclass this hook to select a different DAG scheduler.

Definition at line 123 of file TargetSubtargetInfo.h.

getFrameLowering()

virtual const TargetFrameLowering * llvm::TargetSubtargetInfo::getFrameLowering ( ) const

inlinevirtual

Definition at line 100 of file TargetSubtargetInfo.h.

Referenced by llvm::CodeViewDebug::beginFunctionImpl(), checkNumAlignedDPRCS2Regs(), computeFPBPAlignmentGap(), llvm::LanaiRegisterInfo::eliminateFrameIndex(), llvm::LoongArchRegisterInfo::eliminateFrameIndex(), emitDebugValueComment(), llvm::MachineFrameInfo::estimateStackSize(), fixupBlock(), getAddressForMemoryInput(), getFnStackAlignment(), llvm::AVRRegisterInfo::getFrameRegister(), llvm::M68kRegisterInfo::getFrameRegister(), llvm::XtensaRegisterInfo::getFrameRegister(), llvm::MipsRegisterInfo::getRegPressureLimit(), llvm::XtensaRegisterInfo::getReservedRegs(), llvm::TargetInstrInfo::getSPAdjust(), llvm::X86InstrInfo::getSPAdjust(), llvm::MIRParserImpl::initializeFrameInfo(), insertCSRRestores(), insertCSRRestores(), insertCSRSaves(), insertCSRSaves(), llvm::MipsCallLowering::lowerCall(), llvm::NVPTXTargetLowering::LowerDYNAMIC_STACKALLOC(), llvm::LegalizerHelper::lowerDynStackAlloc(), mayCombineMisaligned(), llvm::MachineFrameInfo::print(), llvm::CFIFixup::runOnMachineFunction(), and llvm::X86FrameLowering::spillFPBP().

getInlineAsmLowering()

virtual const InlineAsmLowering * llvm::TargetSubtargetInfo::getInlineAsmLowering ( ) const

inlinevirtual

Definition at line 109 of file TargetSubtargetInfo.h.

getInstrInfo()

virtual const TargetInstrInfo * llvm::TargetSubtargetInfo::getInstrInfo ( ) const

inlinevirtual

Definition at line 99 of file TargetSubtargetInfo.h.

Referenced by llvm::MachineBasicBlock::addLiveIn(), allowPGOOutlining(), attemptDebugCopyProp(), llvm::avoidZeroOffsetLandingPad(), llvm::DwarfDebug::beginInstruction(), llvm::calculateRegAllocScore(), llvm::MachineBasicBlock::canSplitCriticalEdge(), combineFPFusedMultiply(), llvm::MachineFrameInfo::computeMaxCallFrameSize(), llvm::createBURRListDAGScheduler(), createDedicatedExit(), llvm::createHybridListDAGScheduler(), llvm::createILPListDAGScheduler(), llvm::VLIWResourceModel::createPacketizer(), createPHIsForCMOVsInSinkBB(), createPHIsForSelects(), llvm::createSourceListDAGScheduler(), llvm::TargetInstrInfo::describeLoadedValue(), llvm::BPFRegisterInfo::eliminateFrameIndex(), llvm::LanaiRegisterInfo::eliminateFrameIndex(), llvm::MSP430RegisterInfo::eliminateFrameIndex(), emitAlignedDPRCS2Restores(), emitAlignedDPRCS2Spills(), emitBuildPairF64Pseudo(), emitBuildPairF64Pseudo(), emitComments(), llvm::BPFTargetLowering::EmitInstrWithCustomInserter(), llvm::MSP430TargetLowering::EmitInstrWithCustomInserter(), llvm::ARMBaseRegisterInfo::emitLoadConstPool(), llvm::NVPTXFrameLowering::emitPrologue(), emitQuietFCMP(), emitReadCounterWidePseudo(), emitSelectPseudo(), emitSplitF64Pseudo(), emitSplitPairF64Pseudo(), emitThumb2LoadConstPool(), emitVFROUND_NOEXCEPT_MASK(), llvm::MachineFunction::estimateFunctionSizeInBytes(), llvm::finalizeBundle(), findLoopIncrementValue(), findPrologueEndLoc(), llvm::TargetInstrInfo::genAlternativeCodeSequence(), generateGatherLanePattern(), genIndexedMultiply(), genShXAddAddShift(), llvm::getEHScopeMembership(), llvm::MachineBasicBlock::getFallThrough(), llvm::RegisterBankInfo::getInstrMappingImpl(), llvm::MSP430InstrInfo::getInstSizeInBytes(), getOrCreateFrameHelper(), getSchedRegions(), getTargetIndexName(), llvm::TargetSchedModel::init(), llvm::MipsFunctionInfo::initGlobalBaseReg(), llvm::ConvergingVLIWScheduler::initialize(), llvm::TailDuplicator::initMF(), insertCSRRestores(), insertCSRRestores(), insertCSRSaves(), insertCSRSaves(), insertDivByZeroTrap(), llvm::insertMultibyteShift(), insertRememberRestorePair(), interpretValues(), jumpTableHasOtherUses(), llvm::AArch64CallLowering::lowerCall(), llvm::X86CallLowering::lowerCall(), llvm::ARMBaseRegisterInfo::materializeFrameBaseRegister(), llvm::RISCVRegisterInfo::materializeFrameBaseRegister(), llvm::MachineInstr::mayAlias(), llvm::MachineBasicBlock::print(), llvm::MachineInstr::print(), llvm::MachineOperand::printTargetFlags(), llvm::AArch64FrameLowering::processFunctionBeforeFrameFinalized(), llvm::TargetInstrInfo::reassociateOps(), llvm::TargetInstrInfo::reduceAccumulatorTree(), replaceFI(), llvm::ResourcePriorityQueue::ResourcePriorityQueue(), llvm::AArch64FrameLowering::restoreCalleeSavedRegisters(), llvm::CSKYFrameLowering::restoreCalleeSavedRegisters(), llvm::MSP430FrameLowering::restoreCalleeSavedRegisters(), llvm::RISCVFrameLowering::restoreCalleeSavedRegisters(), llvm::SystemZELFFrameLowering::restoreCalleeSavedRegisters(), llvm::XCoreFrameLowering::restoreCalleeSavedRegisters(), llvm::RAGreedy::run(), runImpl(), llvm::BreakFalseDeps::runOnMachineFunction(), llvm::ExecutionDomainFix::runOnMachineFunction(), llvm::ReachingDefAnalysis::runOnMachineFunction(), setCallTargetReg(), llvm::MachineIRBuilder::setMF(), llvm::TargetRegisterInfo::shouldRegionSplitForVirtReg(), llvm::MachineBasicBlock::SkipPHIsAndLabels(), llvm::MachineBasicBlock::SkipPHIsLabelsAndDebug(), llvm::AArch64FrameLowering::spillCalleeSavedRegisters(), llvm::CSKYFrameLowering::spillCalleeSavedRegisters(), llvm::LoongArchFrameLowering::spillCalleeSavedRegisters(), llvm::MSP430FrameLowering::spillCalleeSavedRegisters(), llvm::RISCVFrameLowering::spillCalleeSavedRegisters(), llvm::SystemZELFFrameLowering::spillCalleeSavedRegisters(), llvm::XCoreFrameLowering::spillCalleeSavedRegisters(), llvm::MachineBasicBlock::SplitCriticalEdge(), UpdateOperandRegClass(), and llvm::MachineBasicBlock::updateTerminator().

getInstrItineraryData()

virtual const InstrItineraryData * llvm::TargetSubtargetInfo::getInstrItineraryData ( ) const

inlinevirtual

getInstrItineraryData - Returns instruction itinerary data for the target or specific subtarget.

Definition at line 138 of file TargetSubtargetInfo.h.

Referenced by llvm::HexagonInstrInfo::CreateTargetScheduleState(), llvm::R600InstrInfo::CreateTargetScheduleState(), and llvm::MachinePipeliner::runOnMachineFunction().

getInstructionSelector()

virtual InstructionSelector * llvm::TargetSubtargetInfo::getInstructionSelector ( ) const

inlinevirtual

Definition at line 117 of file TargetSubtargetInfo.h.

Referenced by llvm::InstructionSelect::runOnMachineFunction().

getLegalizerInfo()

virtual const LegalizerInfo * llvm::TargetSubtargetInfo::getLegalizerInfo ( ) const

inlinevirtual

Definition at line 127 of file TargetSubtargetInfo.h.

Referenced by llvm::MipsRegisterBankInfo::applyMappingImpl(), llvm::machineFunctionIsIllegal(), and llvm::Legalizer::runOnMachineFunction().

getMacroFusions()

virtual std::vector< MacroFusionPredTy > llvm::TargetSubtargetInfo::getMacroFusions ( ) const

inlinevirtual

Get the list of MacroFusion predicates.

Definition at line 346 of file TargetSubtargetInfo.h.

Referenced by llvm::createSchedLive(), and llvm::createSchedPostRA().

getOptLevelToEnablePostRAScheduler()

virtual CodeGenOptLevel llvm::TargetSubtargetInfo::getOptLevelToEnablePostRAScheduler ( ) const

inlinevirtual

Definition at line 286 of file TargetSubtargetInfo.h.

References llvm::Default.

getPostRAMutations()

virtual void llvm::TargetSubtargetInfo::getPostRAMutations ( std::vector< std::unique_ptr< ScheduleDAGMutation > > & Mutations ) const

inlinevirtual

Definition at line 270 of file TargetSubtargetInfo.h.

getRegBankInfo()

virtual const RegisterBankInfo * llvm::TargetSubtargetInfo::getRegBankInfo ( ) const

inlinevirtual

If the information for the register banks is available, return it.

Otherwise return nullptr.

Definition at line 134 of file TargetSubtargetInfo.h.

Referenced by llvm::RegBankSelect::init(), llvm::AArch64CallLowering::lowerCall(), llvm::X86CallLowering::lowerCall(), and llvm::RegisterBankInfo::InstructionMapping::verify().

getRegisterInfo()

virtual const TargetRegisterInfo * llvm::TargetSubtargetInfo::getRegisterInfo ( ) const

pure virtual

Return the target's register information.

Referenced by addLiveInRegs(), llvm::MachineFunction::allocateRegMask(), llvm::TargetFrameLowering::allocateScavengingFrameIndexesNearIncomingSP(), llvm::A57ChainingConstraint::apply(), llvm::HexagonSubtarget::CallMutation::apply(), llvm::RISCVFrameLowering::assignCalleeSavedSpillSlots(), llvm::CodeViewDebug::beginFunctionImpl(), buildAnyextOrCopy(), llvm::LiveRangeEdit::calculateRegClassAndHint(), cannotInsertTailCall(), checkNumAlignedDPRCS2Regs(), computeFPBPAlignmentGap(), computeLiveOuts(), llvm::TargetSchedModel::computeOutputLatency(), convertCallSiteObjects(), convertEntryValueObjects(), convertStackObjects(), llvm::createBURRListDAGScheduler(), llvm::MipsFunctionInfo::createEhDataRegsFI(), llvm::XCoreFunctionInfo::createEHSpillSlot(), llvm::XCoreFunctionInfo::createFPSpillSlot(), llvm::createHybridListDAGScheduler(), llvm::createILPListDAGScheduler(), llvm::MipsFunctionInfo::createISRRegFI(), llvm::XCoreFunctionInfo::createLRSpillSlot(), llvm::createSourceListDAGScheduler(), createTuple(), llvm::MipsInstrInfo::describeLoadedValue(), llvm::TargetInstrInfo::describeLoadedValue(), llvm::AArch64FrameLowering::determineCalleeSaves(), llvm::ARMFrameLowering::determineCalleeSaves(), llvm::CSKYFrameLowering::determineCalleeSaves(), llvm::MipsSEFrameLowering::determineCalleeSaves(), llvm::SystemZELFFrameLowering::determineCalleeSaves(), llvm::TargetFrameLowering::determineCalleeSaves(), emitBuildPairF64Pseudo(), emitCalleeSavedRestores(), llvm::DwarfDebug::emitDebugLocValue(), emitDebugValueComment(), llvm::ARMFrameLowering::emitEpilogue(), emitFakeUse(), emitFrameOffsetAdj(), emitKill(), llvm::CSKYFrameLowering::emitPrologue(), llvm::XCoreFrameLowering::emitPrologue(), emitSplitF64Pseudo(), emitVFROUND_NOEXCEPT_MASK(), estimateRSStackSizeLimit(), llvm::MachineFrameInfo::estimateStackSize(), llvm::finalizeBundle(), findLoopIncrementValue(), llvm::TargetInstrInfo::foldMemoryOperand(), llvm::AArch64InstrInfo::foldMemoryOperandImpl(), llvm::SystemZInstrInfo::foldMemoryOperandImpl(), llvm::X86InstrInfo::foldMemoryOperandImpl(), llvm::TargetFrameLowering::getCalleeSaves(), llvm::TargetFrameLowering::getDwarfFrameBase(), llvm::X86FrameLowering::getDwarfFrameBase(), llvm::CSKYFrameLowering::getFrameIndexReference(), llvm::LoongArchFrameLowering::getFrameIndexReference(), llvm::RISCVFrameLowering::getFrameIndexReference(), llvm::TargetFrameLowering::getFrameIndexReference(), llvm::AArch64FrameLowering::getFrameIndexReferencePreferSP(), getGatherLanePattern(), llvm::AArch64RegisterBankInfo::getInstrAlternativeMappings(), llvm::X86RegisterBankInfo::getInstrAlternativeMappings(), llvm::PPCRegisterBankInfo::getInstrMapping(), llvm::RISCVRegisterBankInfo::getInstrMapping(), llvm::X86RegisterBankInfo::getInstrMapping(), llvm::RegisterBankInfo::getInstrMappingImpl(), llvm::AVRRegisterInfo::getLargestLegalSuperClass(), getMemcpyLoadsAndStores(), getMemmoveLoadsAndStores(), getMemsetStores(), llvm::MipsFunctionInfo::getMoveF64ViaSpillFI(), llvm::MachineFrameInfo::getPristineRegs(), getRegistersForValue(), getRegistersForValue(), getRegTy(), llvm::TargetInstrInfo::getStackSlotRange(), llvm::AArch64FrameLowering::hasFPImpl(), llvm::ARCFrameLowering::hasFPImpl(), llvm::ARMFrameLowering::hasFPImpl(), llvm::CSKYFrameLowering::hasFPImpl(), llvm::LoongArchFrameLowering::hasFPImpl(), llvm::RISCVFrameLowering::hasFPImpl(), llvm::VEFrameLowering::hasFPImpl(), llvm::LiveRegMatrix::init(), llvm::LiveStacks::init(), llvm::RegBankSelect::init(), llvm::RegPressureTracker::init(), initRegisterMaskIds(), insertCSRRestores(), insertCSRRestores(), insertCSRSaves(), insertCSRSaves(), llvm::LoongArchInstrInfo::insertIndirectBranch(), llvm::RISCVInstrInfo::insertIndirectBranch(), interpretValues(), isNonFoldablePartialRegisterLoad(), llvm::TargetInstrInfo::isSchedulingBoundary(), llvm::MipsCallLowering::lowerCall(), llvm::InlineAsmLowering::lowerInlineAsm(), patchMatchingInput(), llvm::MachineBasicBlock::print(), llvm::MachineFunction::print(), printMF(), llvm::ARCFrameLowering::processFunctionBeforeFrameFinalized(), llvm::XCoreFrameLowering::processFunctionBeforeFrameFinalized(), llvm::TargetInstrInfo::reassociateOps(), llvm::ResourcePriorityQueue::ResourcePriorityQueue(), llvm::LiveDebugVariables::LDVImpl::runOnMachineFunction(), llvm::ReachingDefAnalysis::runOnMachineFunction(), llvm::InstructionSelect::selectMachineFunction(), setAliasRegs(), llvm::MIRParserImpl::setupRegisterInfo(), llvm::MachineBasicBlock::splitAt(), llvm::MachineBasicBlock::SplitCriticalEdge(), llvm::X86InstrInfo::unfoldMemoryOperand(), llvm::X86InstrInfo::unfoldMemoryOperand(), updateLiveIn(), UpdateOperandRegClass(), and llvm::RegisterBankInfo::InstructionMapping::verify().

getSelectionDAGInfo()

virtual const SelectionDAGTargetInfo * llvm::TargetSubtargetInfo::getSelectionDAGInfo ( ) const

inlinevirtual

Definition at line 104 of file TargetSubtargetInfo.h.

Referenced by llvm::SelectionDAG::init().

getSMSMutations()

virtual void llvm::TargetSubtargetInfo::getSMSMutations ( std::vector< std::unique_ptr< ScheduleDAGMutation > > & Mutations ) const

inlinevirtual

Definition at line 276 of file TargetSubtargetInfo.h.

getTargetLowering()

virtual const TargetLowering * llvm::TargetSubtargetInfo::getTargetLowering ( ) const

inlinevirtual

Definition at line 103 of file TargetSubtargetInfo.h.

Referenced by llvm::MachineIRBuilder::buildBoolExtInReg(), llvm::calculateDbgEntityHistory(), createAtomicLibcall(), llvm::createLibcall(), llvm::createMemLibcall(), llvm::XCoreFrameLowering::emitEpilogue(), llvm::SystemZELFFrameLowering::emitPrologue(), llvm::XCoreFrameLowering::emitPrologue(), llvm::HexagonSelectionDAGInfo::EmitTargetCodeForMemcpy(), llvm::XCoreSelectionDAGInfo::EmitTargetCodeForMemcpy(), llvm::MachineIRBuilder::getBoolExtOp(), llvm::SystemZELFRegisters::getCalleeSavedRegs(), llvm::SystemZELFRegisters::getCallPreservedMask(), getRegistersForValue(), llvm::SelectionDAG::init(), llvm::GenericScheduler::initPolicy(), interpretValues(), isRegOtherThanSPAndFP(), llvm::TargetInstrInfo::isSchedulingBoundary(), llvm::MachineBasicBlock::liveout_begin(), llvm::LegalizerHelper::lowerMemCpyFamily(), llvm::ExpandFpPass::run(), llvm::ExpandLargeDivRemPass::run(), llvm::SafeStackPass::run(), runImpl(), llvm::InstructionSelect::selectMachineFunction(), and llvm::AArch64GISelUtils::tryEmitBZero().

ignoreCSRForAllocationOrder()

virtual bool llvm::TargetSubtargetInfo::ignoreCSRForAllocationOrder ( const MachineFunction & MF, MCRegister PhysReg ) const

inlinevirtual

True if the register allocator should use the allocation orders exactly as written in the tablegen descriptions, false if it should allocate the specified physical register later if is it callee-saved.

Definition at line 327 of file TargetSubtargetInfo.h.

isDependencyBreaking()

virtual bool llvm::TargetSubtargetInfo::isDependencyBreaking ( const MachineInstr * MI, APInt & Mask ) const

inlinevirtual

Returns true if MI is a dependency breaking instruction for the subtarget.

Similar in behavior to isZeroIdiom. However, it knows how to identify all dependency breaking instructions (i.e. not just zero-idioms).

As for isZeroIdiom, this method returns a mask of "broken" dependencies. (See method isZeroIdiom for a detailed description of Mask).

Definition at line 172 of file TargetSubtargetInfo.h.

References isZeroIdiom(), and MI.

isOptimizableRegisterMove()

virtual bool llvm::TargetSubtargetInfo::isOptimizableRegisterMove ( const MachineInstr * MI ) const

inlinevirtual

Returns true if MI is a candidate for move elimination.

A candidate for move elimination may be optimized out at register renaming stage. Subtargets can specify the set of optimizable moves by instantiating tablegen class IsOptimizableRegisterMove (see llvm/Target/TargetInstrPredicate.td).

SubtargetEmitter is responsible for processing all the definitions of class IsOptimizableRegisterMove, and auto-generate an override for this method.

Definition at line 185 of file TargetSubtargetInfo.h.

References MI.

isRegisterReservedByUser()

virtual bool llvm::TargetSubtargetInfo::isRegisterReservedByUser ( Register R ) const

inlinevirtual

Definition at line 355 of file TargetSubtargetInfo.h.

Referenced by llvm::RISCVRegisterInfo::isAsmClobberable(), and llvm::RISCVTargetLowering::LowerCall().

isXRaySupported()

virtual bool llvm::TargetSubtargetInfo::isXRaySupported ( ) const

inlinevirtual

Definition at line 87 of file TargetSubtargetInfo.h.

isZeroIdiom()

virtual bool llvm::TargetSubtargetInfo::isZeroIdiom ( const MachineInstr * MI, APInt & Mask ) const

inlinevirtual

Returns true if MI is a dependency breaking zero-idiom instruction for the subtarget.

This function also sets bits in Mask related to input operands that are not in a data dependency relationship. There is one bit for each machine operand; implicit operands follow explicit operands in the bit representation used for Mask. An empty (i.e. a mask with all bits cleared) means: data dependencies are "broken" for all the explicit input machine operands of MI.

Definition at line 161 of file TargetSubtargetInfo.h.

References MI.

Referenced by isDependencyBreaking().

mirFileLoaded()

void TargetSubtargetInfo::mirFileLoaded ( MachineFunction & MF ) const

virtual

This is called after a .mir file was loaded.

Definition at line 61 of file TargetSubtargetInfo.cpp.

Referenced by llvm::MIRParserImpl::initializeMachineFunction().

operator=()

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

delete

References TargetSubtargetInfo().

overridePostRASchedPolicy()

virtual void llvm::TargetSubtargetInfo::overridePostRASchedPolicy ( MachineSchedPolicy & Policy, const SchedRegion & Region ) const

inlinevirtual

Override generic post-ra scheduling policy within a region.

This is a convenient way for targets that don't provide any custom scheduling heuristics (no custom MachineSchedStrategy) to make changes to the generic post-ra scheduling policy. Note that some options like tracking register pressure won't take effect in post-ra scheduling.

Definition at line 244 of file TargetSubtargetInfo.h.

Referenced by llvm::PostGenericScheduler::initPolicy().

overrideSchedPolicy()

virtual void llvm::TargetSubtargetInfo::overrideSchedPolicy ( MachineSchedPolicy & Policy, const SchedRegion & Region ) const

inlinevirtual

Override generic scheduling policy within a region.

This is a convenient way for targets that don't provide any custom scheduling heuristics (no custom MachineSchedStrategy) to make changes to the generic scheduling policy.

Definition at line 234 of file TargetSubtargetInfo.h.

Referenced by llvm::GenericScheduler::initPolicy().

requiresDisjointEarlyClobberAndUndef()

virtual bool llvm::TargetSubtargetInfo::requiresDisjointEarlyClobberAndUndef ( ) const

inlinevirtual

Whether the target has instructions where an early-clobber result operand cannot overlap with an undef input operand.

Definition at line 350 of file TargetSubtargetInfo.h.

resolveSchedClass()

virtual unsigned llvm::TargetSubtargetInfo::resolveSchedClass ( unsigned SchedClass, const MachineInstr * MI, const TargetSchedModel * SchedModel ) const

inlinevirtual

Resolve a SchedClass at runtime, where SchedClass identifies an MCSchedClassDesc with the isVariant property.

This may return the ID of another variant SchedClass, but repeated invocation must quickly terminate in a nonvariant SchedClass.

Definition at line 146 of file TargetSubtargetInfo.h.

References MI.

useAA()

bool TargetSubtargetInfo::useAA ( ) const

virtual

Enable use of alias analysis during code generation (during MI scheduling, DAGCombine, etc.).

Definition at line 57 of file TargetSubtargetInfo.cpp.

Referenced by addrSinkUsingGEPs().

useDFAforSMS()

virtual bool llvm::TargetSubtargetInfo::useDFAforSMS ( ) const

inlinevirtual

Default to DFA for resource management, return false when target will use ProcResource in InstrSchedModel instead.

Definition at line 282 of file TargetSubtargetInfo.h.

Referenced by llvm::MachinePipeliner::runOnMachineFunction().

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

• include/llvm/CodeGen/TargetSubtargetInfo.h
• lib/CodeGen/TargetSubtargetInfo.cpp