llvm::InstructionSelect Class Reference

This pass is responsible for selecting generic machine instructions to target-specific instructions. More...

#include "llvm/CodeGen/GlobalISel/InstructionSelect.h"

Inheritance diagram for llvm::InstructionSelect:

Public Member Functions
StringRef	getPassName () const override
	getPassName - Return a nice clean name for a pass.
void	getAnalysisUsage (AnalysisUsage &AU) const override
	getAnalysisUsage - This function should be overriden by passes that need analysis information to do their job.
MachineFunctionProperties	getRequiredProperties () const override
MachineFunctionProperties	getSetProperties () const override
	InstructionSelect (CodeGenOptLevel OL)
	InstructionSelect ()
bool	runOnMachineFunction (MachineFunction &MF) override
	runOnMachineFunction - This method must be overloaded to perform the desired machine code transformation or analysis.
Public Member Functions inherited from llvm::MachineFunctionPass
bool	doInitialization (Module &) override
	doInitialization - Virtual method overridden by subclasses to do any necessary initialization before any pass is run.
Public Member Functions inherited from llvm::FunctionPass
	FunctionPass (char &pid)
Pass *	createPrinterPass (raw_ostream &OS, const std::string &Banner) const override
	createPrinterPass - Get a function printer pass.
virtual bool	runOnFunction (Function &F)=0
	runOnFunction - Virtual method overriden by subclasses to do the per-function processing of the pass.
void	assignPassManager (PMStack &PMS, PassManagerType T) override
	Find appropriate Function Pass Manager or Call Graph Pass Manager in the PM Stack and add self into that manager.
PassManagerType	getPotentialPassManagerType () const override
	Return what kind of Pass Manager can manage this pass.
Public Member Functions inherited from llvm::Pass
	Pass (PassKind K, char &pid)
	Pass (const Pass &)=delete
Pass &	operator= (const Pass &)=delete
virtual	~Pass ()
PassKind	getPassKind () const
virtual StringRef	getPassName () const
	getPassName - Return a nice clean name for a pass.
AnalysisID	getPassID () const
	getPassID - Return the PassID number that corresponds to this pass.
virtual bool	doInitialization (Module &)
	doInitialization - Virtual method overridden by subclasses to do any necessary initialization before any pass is run.
virtual bool	doFinalization (Module &)
	doFinalization - Virtual method overriden by subclasses to do any necessary clean up after all passes have run.
virtual void	print (raw_ostream &OS, const Module *M) const
	print - Print out the internal state of the pass.
void	dump () const
virtual Pass *	createPrinterPass (raw_ostream &OS, const std::string &Banner) const =0
	createPrinterPass - Get a Pass appropriate to print the IR this pass operates on (Module, Function or MachineFunction).
virtual void	assignPassManager (PMStack &, PassManagerType)
	Each pass is responsible for assigning a pass manager to itself.
virtual void	preparePassManager (PMStack &)
	Check if available pass managers are suitable for this pass or not.
virtual PassManagerType	getPotentialPassManagerType () const
	Return what kind of Pass Manager can manage this pass.
void	setResolver (AnalysisResolver *AR)
AnalysisResolver *	getResolver () const
virtual void	getAnalysisUsage (AnalysisUsage &) const
	getAnalysisUsage - This function should be overriden by passes that need analysis information to do their job.
virtual void	releaseMemory ()
	releaseMemory() - This member can be implemented by a pass if it wants to be able to release its memory when it is no longer needed.
virtual void *	getAdjustedAnalysisPointer (AnalysisID ID)
	getAdjustedAnalysisPointer - This method is used when a pass implements an analysis interface through multiple inheritance.
virtual ImmutablePass *	getAsImmutablePass ()
virtual PMDataManager *	getAsPMDataManager ()
virtual void	verifyAnalysis () const
	verifyAnalysis() - This member can be implemented by a analysis pass to check state of analysis information.
virtual void	dumpPassStructure (unsigned Offset=0)
template<typename AnalysisType >
AnalysisType *	getAnalysisIfAvailable () const
	getAnalysisIfAvailable<AnalysisType>() - Subclasses use this function to get analysis information that might be around, for example to update it.
bool	mustPreserveAnalysisID (char &AID) const
	mustPreserveAnalysisID - This method serves the same function as getAnalysisIfAvailable, but works if you just have an AnalysisID.
template<typename AnalysisType >
AnalysisType &	getAnalysis () const
	getAnalysis<AnalysisType>() - This function is used by subclasses to get to the analysis information that they claim to use by overriding the getAnalysisUsage function.
template<typename AnalysisType >
AnalysisType &	getAnalysis (Function &F, bool *Changed=nullptr)
	getAnalysis<AnalysisType>() - This function is used by subclasses to get to the analysis information that they claim to use by overriding the getAnalysisUsage function.
template<typename AnalysisType >
AnalysisType &	getAnalysisID (AnalysisID PI) const
template<typename AnalysisType >
AnalysisType &	getAnalysisID (AnalysisID PI, Function &F, bool *Changed=nullptr)

Static Public Attributes
static char	ID = 0

Protected Attributes
BlockFrequencyInfo *	BFI = nullptr
ProfileSummaryInfo *	PSI = nullptr
CodeGenOptLevel	OptLevel = CodeGenOptLevel::None

Additional Inherited Members
Static Public Member Functions inherited from llvm::Pass
static const PassInfo *	lookupPassInfo (const void *TI)
static const PassInfo *	lookupPassInfo (StringRef Arg)
static Pass *	createPass (AnalysisID ID)
Protected Member Functions inherited from llvm::MachineFunctionPass
	MachineFunctionPass (char &ID)
virtual bool	runOnMachineFunction (MachineFunction &MF)=0
	runOnMachineFunction - This method must be overloaded to perform the desired machine code transformation or analysis.
void	getAnalysisUsage (AnalysisUsage &AU) const override
	getAnalysisUsage - Subclasses that override getAnalysisUsage must call this.
virtual MachineFunctionProperties	getRequiredProperties () const
virtual MachineFunctionProperties	getSetProperties () const
virtual MachineFunctionProperties	getClearedProperties () const
Protected Member Functions inherited from llvm::FunctionPass
bool	skipFunction (const Function &F) const
	Optional passes call this function to check whether the pass should be skipped.

Detailed Description

This pass is responsible for selecting generic machine instructions to target-specific instructions.

It relies on the InstructionSelector provided by the target. Selection is done by examining blocks in post-order, and instructions in reverse order.

Postcondition

for all inst in MF: not isPreISelGenericOpcode(inst.opcode)

Definition at line 33 of file InstructionSelect.h.

Constructor & Destructor Documentation

InstructionSelect() [1/2]

Select target instructions out of generic false InstructionSelect::InstructionSelect

(

CodeGenOptLevel

OL

)

Definition at line 61 of file InstructionSelect.cpp.

InstructionSelect() [2/2]

InstructionSelect::InstructionSelect

(

)

Definition at line 67 of file InstructionSelect.cpp.

Member Function Documentation

getAnalysisUsage()

void InstructionSelect::getAnalysisUsage ( AnalysisUsage &  ) const

overridevirtual

getAnalysisUsage - This function should be overriden by passes that need analysis information to do their job.

If a pass specifies that it uses a particular analysis result to this function, it can then use the getAnalysis<AnalysisType>() function, below.

Reimplemented from llvm::Pass.

Definition at line 70 of file InstructionSelect.cpp.

References llvm::AnalysisUsage::addPreserved(), llvm::AnalysisUsage::addRequired(), llvm::MachineFunctionPass::getAnalysisUsage(), llvm::LazyBlockFrequencyInfoPass::getLazyBFIAnalysisUsage(), llvm::getSelectionDAGFallbackAnalysisUsage(), llvm::None, and OptLevel.

getPassName()

StringRef llvm::InstructionSelect::getPassName ( ) const

inlineoverridevirtual

getPassName - Return a nice clean name for a pass.

This usually implemented in terms of the name that is registered by one of the Registration templates, but can be overloaded directly.

Reimplemented from llvm::Pass.

Definition at line 36 of file InstructionSelect.h.

getRequiredProperties()

MachineFunctionProperties llvm::InstructionSelect::getRequiredProperties ( ) const

inlineoverridevirtual

Reimplemented from llvm::MachineFunctionPass.

Definition at line 40 of file InstructionSelect.h.

References llvm::MachineFunctionProperties::IsSSA, llvm::MachineFunctionProperties::Legalized, llvm::MachineFunctionProperties::RegBankSelected, and llvm::MachineFunctionProperties::set().

getSetProperties()

MachineFunctionProperties llvm::InstructionSelect::getSetProperties ( ) const

inlineoverridevirtual

Reimplemented from llvm::MachineFunctionPass.

Definition at line 47 of file InstructionSelect.h.

References llvm::MachineFunctionProperties::Selected, and llvm::MachineFunctionProperties::set().

runOnMachineFunction()

bool InstructionSelect::runOnMachineFunction ( MachineFunction &  MF )

overridevirtual

runOnMachineFunction - This method must be overloaded to perform the desired machine code transformation or analysis.

Implements llvm::MachineFunctionPass.

Definition at line 83 of file InstructionSelect.cpp.

References assert(), llvm::MachineBasicBlock::begin(), BFI, llvm::canReplaceReg(), llvm::MachineBasicBlock::clear(), llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::contains(), CoveragePrefix, llvm::CodeGenCoverage::covered(), llvm::GIMatchTableExecutor::CurMBB, llvm::dbgs(), llvm::DisableGISelLegalityCheck, E, llvm::CodeGenCoverage::emit(), llvm::MachineBasicBlock::empty(), llvm::MachineBasicBlock::end(), llvm::MachineFunctionProperties::FailedISel, llvm::TargetLoweringBase::finalizeLowering(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::TargetSubtargetInfo::getInstructionSelector(), llvm::MachineFunction::getName(), llvm::TargetMachine::getOptLevel(), llvm::MachineFunction::getProperties(), llvm::MachineFunction::getRegInfo(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::LLT::getSizeInBits(), llvm::Function::getSubprogram(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getTarget(), llvm::TargetSubtargetInfo::getTargetLowering(), llvm::MachineFrameInfo::hasCalls(), llvm::MachineFunction::hasInlineAsm(), llvm::Function::hasOptNone(), llvm::ProfileSummaryInfo::hasProfileSummary(), llvm::MachineFunctionProperties::hasProperty(), I, llvm::Register::index2VirtReg(), llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::insert(), llvm::isPreISelGenericOptimizationHint(), llvm::isTriviallyDead(), llvm::LLT::isValid(), llvm::Register::isVirtual(), LLVM_DEBUG, llvm::machineFunctionIsIllegal(), llvm::make_range(), llvm::make_scope_exit(), MBB, MI, MORE, MRI, llvm::None, OptLevel, llvm::post_order(), PSI, llvm::reportGISelFailure(), llvm::salvageDebugInfo(), llvm::InstructionSelector::select(), llvm::MachineFrameInfo::setHasCalls(), llvm::MachineFunction::setHasInlineAsm(), llvm::GIMatchTableExecutor::setupMF(), llvm::MachineFunction::size(), and TRI.

Member Data Documentation

BFI

BlockFrequencyInfo* llvm::InstructionSelect::BFI = nullptr

protected

Definition at line 58 of file InstructionSelect.h.

Referenced by runOnMachineFunction().

ID

char InstructionSelect::ID = 0

static

Definition at line 35 of file InstructionSelect.h.

OptLevel

CodeGenOptLevel llvm::InstructionSelect::OptLevel = CodeGenOptLevel::None

protected

Definition at line 61 of file InstructionSelect.h.

Referenced by getAnalysisUsage(), and runOnMachineFunction().

PSI

ProfileSummaryInfo* llvm::InstructionSelect::PSI = nullptr

protected

Definition at line 59 of file InstructionSelect.h.

Referenced by runOnMachineFunction().

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

• include/llvm/CodeGen/GlobalISel/InstructionSelect.h
• lib/CodeGen/GlobalISel/InstructionSelect.cpp