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:

Classes
class	MIIteratorMaintainer
	This class observes instruction insertions/removals. More...

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=CodeGenOptLevel::Default, char &PassID=ID)
bool	runOnMachineFunction (MachineFunction &MF) override
	runOnMachineFunction - This method must be overloaded to perform the desired machine code transformation or analysis.
bool	selectMachineFunction (MachineFunction &MF)
void	setInstructionSelector (InstructionSelector *NewISel)
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)
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
StringRef	getPassArgument () const
	Return a nice clean name for a pass corresponding to that used to enable the pass in opt.
AnalysisID	getPassID () const
	getPassID - Return the PassID number that corresponds to this pass.
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 void	preparePassManager (PMStack &)
	Check if available pass managers are suitable for this pass or not.
void	setResolver (AnalysisResolver *AR)
AnalysisResolver *	getResolver () const
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 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 Member Functions
bool	selectInstr (MachineInstr &MI)
Protected Member Functions inherited from llvm::MachineFunctionPass
	MachineFunctionPass (char &ID)
void	getAnalysisUsage (AnalysisUsage &AU) const override
	getAnalysisUsage - Subclasses that override getAnalysisUsage must call this.
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.

Protected Attributes
InstructionSelector *	ISel = nullptr
GISelValueTracking *	VT = nullptr
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)

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 36 of file InstructionSelect.h.

Constructor & Destructor Documentation

◆ InstructionSelect()

Select target instructions out of generic false InstructionSelect::InstructionSelect	(	CodeGenOptLevel	OL = CodeGenOptLevel::Default,
		char &	PassID = ID )