llvm::MachineTraceMetrics Class Reference

#include <MachineTraceMetrics.h>

Inheritance diagram for llvm::MachineTraceMetrics:

Collaboration diagram for llvm::MachineTraceMetrics:

Classes
class	Ensemble
struct	FixedBlockInfo
struct	InstrCycles
struct	LiveInReg
class	Trace
struct	TraceBlockInfo

Public Types
enum	Strategy { TS_MinInstrCount, TS_NumStrategies }
	Strategies for selecting traces. More...

Public Member Functions
	MachineTraceMetrics ()
void	getAnalysisUsage (AnalysisUsage &) const
bool	runOnMachineFunction (MachineFunction &)
void	releaseMemory ()
void	verifyAnalysis () const
const FixedBlockInfo *	getResources (const MachineBasicBlock *)
	Get the fixed resource information about MBB. Compute it on demand. More...
ArrayRef< unsigned >	getProcResourceCycles (unsigned MBBNum) const
Ensemble *	getEnsemble (Strategy)
void	invalidate (const MachineBasicBlock *MBB)
Public Member Functions inherited from llvm::FunctionPass
	FunctionPass (char &pid)
Pass *	createPrinterPass (raw_ostream &O, const std::string &Banner) const
	createPrinterPass - Get a function printer pass. More...
virtual void	assignPassManager (PMStack &PMS, PassManagerType T)
virtual PassManagerType	getPotentialPassManagerType () const
	Return what kind of Pass Manager can manage this pass. More...
Public Member Functions inherited from llvm::Pass
	Pass (PassKind K, char &pid)
virtual	~Pass ()
PassKind	getPassKind () const
virtual const char *	getPassName () const
AnalysisID	getPassID () const
	getPassID - Return the PassID number that corresponds to this pass. More...
virtual bool	doInitialization (Module &)
virtual bool	doFinalization (Module &)
virtual void	print (raw_ostream &O, const Module *M) const
void	dump () const
virtual void	preparePassManager (PMStack &)
	Check if available pass managers are suitable for this pass or not. More...
void	setResolver (AnalysisResolver *AR)
AnalysisResolver *	getResolver () const
virtual void *	getAdjustedAnalysisPointer (AnalysisID ID)
virtual ImmutablePass *	getAsImmutablePass ()
virtual PMDataManager *	getAsPMDataManager ()
virtual void	dumpPassStructure (unsigned Offset=0)
template<typename AnalysisType >
AnalysisType *	getAnalysisIfAvailable () const
bool	mustPreserveAnalysisID (char &AID) const
template<typename AnalysisType >
AnalysisType &	getAnalysis () const
template<typename AnalysisType >
AnalysisType &	getAnalysis (Function &F)
template<typename AnalysisType >
AnalysisType &	getAnalysisID (AnalysisID PI) const
template<typename AnalysisType >
AnalysisType &	getAnalysisID (AnalysisID PI, Function &F)

Static Public Attributes
static char	ID = 0

Friends
class	Ensemble
class	Trace

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)

Detailed Description

Definition at line 67 of file MachineTraceMetrics.h.

Member Enumeration Documentation

enum llvm::MachineTraceMetrics::Strategy

Strategies for selecting traces.

Enumerator
TS_MinInstrCount	Select the trace through a block that has the fewest instructions.
TS_NumStrategies

Definition at line 334 of file MachineTraceMetrics.h.

Constructor & Destructor Documentation

machine trace Machine Trace true MachineTraceMetrics::MachineTraceMetrics

(

)

Definition at line 39 of file MachineTraceMetrics.cpp.

References llvm::array_endof().

Member Function Documentation

void MachineTraceMetrics::getAnalysisUsage ( AnalysisUsage &  AU ) const

virtual

getAnalysisUsage - Subclasses that override getAnalysisUsage must call this.

For MachineFunctionPasses, calling AU.preservesCFG() indicates that the pass does not modify the MachineBasicBlock CFG.

Reimplemented from llvm::MachineFunctionPass.

Definition at line 44 of file MachineTraceMetrics.cpp.

References llvm::AnalysisUsage::addRequired(), llvm::MachineFunctionPass::getAnalysisUsage(), and llvm::AnalysisUsage::setPreservesAll().

MachineTraceMetrics::Ensemble * MachineTraceMetrics::getEnsemble

(

MachineTraceMetrics::Strategy

strategy

)

Get the trace ensemble representing the given trace selection strategy. The returned Ensemble object is owned by the MachineTraceMetrics analysis, and valid for the lifetime of the analysis pass.

Definition at line 375 of file MachineTraceMetrics.cpp.

References llvm_unreachable, TS_MinInstrCount, and TS_NumStrategies.

ArrayRef< unsigned > MachineTraceMetrics::getProcResourceCycles

(

unsigned

MBBNum

)

const

Get the scaled number of cycles used per processor resource in MBB. This is an array with SchedModel.getNumProcResourceKinds() entries. The getResources() function above must have been called first.

These numbers have already been scaled by SchedModel.getResourceFactor().

Definition at line 133 of file MachineTraceMetrics.cpp.

References llvm::SmallVectorTemplateCommon< T, typename >::data(), llvm::TargetSchedModel::getNumProcResourceKinds(), and llvm::SmallVectorTemplateCommon< T, typename >::size().

const MachineTraceMetrics::FixedBlockInfo * MachineTraceMetrics::getResources

(

const MachineBasicBlock *

MBB

)

Get the fixed resource information about MBB. Compute it on demand.

Compute the resource usage in basic block MBB.

Definition at line 84 of file MachineTraceMetrics.cpp.

References llvm::MachineBasicBlock::begin(), llvm::MachineBasicBlock::end(), llvm::MachineBasicBlock::getNumber(), llvm::TargetSchedModel::getNumProcResourceKinds(), llvm::TargetSchedModel::getResourceFactor(), llvm::TargetSchedModel::getWriteProcResBegin(), llvm::TargetSchedModel::getWriteProcResEnd(), llvm::MachineTraceMetrics::FixedBlockInfo::HasCalls, llvm::TargetSchedModel::hasInstrSchedModel(), llvm::MachineTraceMetrics::FixedBlockInfo::hasResources(), I, if(), llvm::MachineTraceMetrics::FixedBlockInfo::InstrCount, llvm::MachineInstr::isCall(), llvm::MachineInstr::isTransient(), llvm::MCSchedClassDesc::isValid(), llvm::A64CC::MI, llvm::TargetSchedModel::resolveSchedClass(), and llvm::PPCISD::SC.

void MachineTraceMetrics::invalidate

(

const MachineBasicBlock *

MBB

)

Invalidate cached information about MBB. This must be called before MBB is erased, or the CFG is otherwise changed.

This invalidates per-block information about resource usage for MBB only, and it invalidates per-trace information for any trace that passes through MBB.

Call Ensemble::getTrace() again to update any trace handles.

Definition at line 388 of file MachineTraceMetrics.cpp.

References llvm::dbgs(), DEBUG, llvm::MachineBasicBlock::getNumber(), llvm::MachineTraceMetrics::Ensemble::invalidate(), and TS_NumStrategies.

void MachineTraceMetrics::releaseMemory ( )

virtual

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. The default behavior of passes is to hold onto memory for the entire duration of their lifetime (which is the entire compile time). For pipelined passes, this is not a big deal because that memory gets recycled every time the pass is invoked on another program unit. For IP passes, it is more important to free memory when it is unused.

Optionally implement this function to release pass memory when it is no longer used.

Reimplemented from llvm::Pass.

Definition at line 66 of file MachineTraceMetrics.cpp.

References TS_NumStrategies.

bool MachineTraceMetrics::runOnMachineFunction ( MachineFunction &  MF )

virtual

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

Implements llvm::MachineFunctionPass.

Definition at line 51 of file MachineTraceMetrics.cpp.

References llvm::TargetMachine::getInstrInfo(), llvm::MachineFunction::getNumBlockIDs(), llvm::TargetSchedModel::getNumProcResourceKinds(), llvm::MachineFunction::getRegInfo(), llvm::TargetMachine::getRegisterInfo(), llvm::TargetMachine::getSubtarget(), llvm::MachineFunction::getTarget(), llvm::TargetSchedModel::init(), Loops, MRI, llvm::SmallVectorImpl< T >::resize(), llvm::A64DB::ST, and TII.

void MachineTraceMetrics::verifyAnalysis ( ) const

virtual

verifyAnalysis() - This member can be implemented by a analysis pass to check state of analysis information.

Reimplemented from llvm::Pass.

Definition at line 396 of file MachineTraceMetrics.cpp.

References llvm::MachineFunction::getNumBlockIDs(), TS_NumStrategies, and llvm::MachineTraceMetrics::Ensemble::verify().

Friends And Related Function Documentation

friend class Ensemble

friend

Definition at line 85 of file MachineTraceMetrics.h.

friend class Trace

friend

Definition at line 86 of file MachineTraceMetrics.h.

Referenced by llvm::MachineTraceMetrics::Ensemble::getTrace().

Member Data Documentation

char MachineTraceMetrics::ID = 0

static

Definition at line 77 of file MachineTraceMetrics.h.

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

• MachineTraceMetrics.h
• MachineTraceMetrics.cpp