llvm::MachineTraceMetrics Class Reference

#include "llvm/CodeGen/MachineTraceMetrics.h"

Classes
class	Ensemble
	A trace ensemble is a collection of traces selected using the same strategy, for example 'minimum resource height'. More...
struct	FixedBlockInfo
	Per-basic block information that doesn't depend on the trace through the block. More...
struct	InstrCycles
	InstrCycles represents the cycle height and depth of an instruction in a trace. More...
struct	LiveInReg
	A virtual register or regunit required by a basic block or its trace successors. More...
class	Trace
	A trace represents a plausible sequence of executed basic blocks that passes through the current basic block one. More...
struct	TraceBlockInfo
	Per-basic block information that relates to a specific trace through the block. More...

Public Member Functions
	MachineTraceMetrics ()=default
	MachineTraceMetrics (MachineFunction &MF, const MachineLoopInfo &LI)
	MachineTraceMetrics (MachineTraceMetrics &&)=default
	~MachineTraceMetrics ()
void	init (MachineFunction &Func, const MachineLoopInfo &LI)
void	clear ()
const FixedBlockInfo *	getResources (const MachineBasicBlock *)
	Get the fixed resource information about MBB. Compute it on demand.
ArrayRef< unsigned >	getProcReleaseAtCycles (unsigned MBBNum) const
	Get the scaled number of cycles used per processor resource in MBB.
Ensemble *	getEnsemble (MachineTraceStrategy)
	Get the trace ensemble representing the given trace selection strategy.
void	invalidate (const MachineBasicBlock *MBB)
	Invalidate cached information about MBB.
bool	invalidate (MachineFunction &, const PreservedAnalyses &PA, MachineFunctionAnalysisManager::Invalidator &)
	Handle invalidation explicitly.
void	verifyAnalysis () const

Friends
class	MachineTraceMetricsWrapperPass
class	Ensemble
class	Trace

Detailed Description

Definition at line 97 of file MachineTraceMetrics.h.

Constructor & Destructor Documentation

MachineTraceMetrics() [1/3]

llvm::MachineTraceMetrics::MachineTraceMetrics ( )

default

MachineTraceMetrics() [2/3]

llvm::MachineTraceMetrics::MachineTraceMetrics ( MachineFunction &  MF, const MachineLoopInfo &  LI  )

inlineexplicit

Definition at line 115 of file MachineTraceMetrics.h.

References init().

MachineTraceMetrics() [3/3]

llvm::MachineTraceMetrics::MachineTraceMetrics ( MachineTraceMetrics &&  )

default

~MachineTraceMetrics()

MachineTraceMetrics::~MachineTraceMetrics

(

)

Definition at line 93 of file MachineTraceMetrics.cpp.

References clear().

Member Function Documentation

clear()

void MachineTraceMetrics::clear

(

)

Definition at line 95 of file MachineTraceMetrics.cpp.

Referenced by llvm::MachineTraceMetricsWrapperPass::releaseMemory(), and ~MachineTraceMetrics().

getEnsemble()

MachineTraceMetrics::Ensemble * MachineTraceMetrics::getEnsemble

(

MachineTraceStrategy

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 412 of file MachineTraceMetrics.cpp.

References assert(), llvm_unreachable, llvm::TS_Local, llvm::TS_MinInstrCount, and llvm::TS_NumStrategies.

getProcReleaseAtCycles()

ArrayRef< unsigned > MachineTraceMetrics::getProcReleaseAtCycles

(

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 158 of file MachineTraceMetrics.cpp.

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

getResources()

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 111 of file MachineTraceMetrics.cpp.

References assert(), 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(), llvm::MachineTraceMetrics::FixedBlockInfo::InstrCount, InstrCount, MBB, MI, and llvm::TargetSchedModel::resolveSchedClass().

init()

void MachineTraceMetrics::init	(	MachineFunction &	Func,
		const MachineLoopInfo &	LI
	)

Definition at line 74 of file MachineTraceMetrics.cpp.

References llvm::MachineFunction::getNumBlockIDs(), llvm::TargetSchedModel::getNumProcResourceKinds(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::TargetSchedModel::init(), and llvm::SmallVectorImpl< T >::resize().

Referenced by MachineTraceMetrics(), and llvm::MachineTraceMetricsWrapperPass::runOnMachineFunction().

invalidate() [1/2]

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 433 of file MachineTraceMetrics.cpp.

References llvm::dbgs(), llvm::MachineBasicBlock::getNumber(), LLVM_DEBUG, MBB, and llvm::printMBBReference().

invalidate() [2/2]

bool MachineTraceMetrics::invalidate	(	MachineFunction &	,
		const PreservedAnalyses &	PA,
		MachineFunctionAnalysisManager::Invalidator &
	)

Handle invalidation explicitly.

Definition at line 442 of file MachineTraceMetrics.cpp.

References llvm::PreservedAnalyses::getChecker().

verifyAnalysis()

void MachineTraceMetrics::verifyAnalysis

(

)

const

Definition at line 453 of file MachineTraceMetrics.cpp.

References assert(), and llvm::MachineFunction::getNumBlockIDs().

Referenced by llvm::MachineTraceMetricsWrapperPass::verifyAnalysis().

Friends And Related Function Documentation

Ensemble

friend class Ensemble

friend

Definition at line 107 of file MachineTraceMetrics.h.

MachineTraceMetricsWrapperPass

friend class MachineTraceMetricsWrapperPass

friend

Definition at line 106 of file MachineTraceMetrics.h.

Trace

friend class Trace

friend

Definition at line 108 of file MachineTraceMetrics.h.

---

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

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