MachineBlockFrequencyInfo pass uses BlockFrequencyInfoImpl implementation to estimate machine basic block frequencies. More...
#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
Public Member Functions | |
| MachineBlockFrequencyInfo () | |
| ~MachineBlockFrequencyInfo () override | |
| void | getAnalysisUsage (AnalysisUsage &AU) const override |
| getAnalysisUsage - This function should be overriden by passes that need analysis information to do their job. More... | |
| bool | runOnMachineFunction (MachineFunction &F) override |
| runOnMachineFunction - This method must be overloaded to perform the desired machine code transformation or analysis. More... | |
| void | calculate (const MachineFunction &F, const MachineBranchProbabilityInfo &MBPI, const MachineLoopInfo &MLI) |
| calculate - compute block frequency info for the given function. More... | |
| void | releaseMemory () override |
| 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. More... | |
| BlockFrequency | getBlockFreq (const MachineBasicBlock *MBB) const |
| getblockFreq - Return block frequency. More... | |
| Optional< uint64_t > | getBlockProfileCount (const MachineBasicBlock *MBB) const |
| Optional< uint64_t > | getProfileCountFromFreq (uint64_t Freq) const |
| bool | isIrrLoopHeader (const MachineBasicBlock *MBB) |
| const MachineFunction * | getFunction () const |
| const MachineBranchProbabilityInfo * | getMBPI () const |
| void | view (const Twine &Name, bool isSimple=true) const |
| Pop up a ghostview window with the current block frequency propagation rendered using dot. More... | |
| raw_ostream & | printBlockFreq (raw_ostream &OS, const BlockFrequency Freq) const |
| raw_ostream & | printBlockFreq (raw_ostream &OS, const MachineBasicBlock *MBB) const |
| uint64_t | getEntryFreq () const |
 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. More... | |
| 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. More... | |
| 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. More... | |
| PassManagerType | getPotentialPassManagerType () const override |
| Return what kind of Pass Manager can manage this pass. More... | |
| 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. More... | |
| AnalysisID | getPassID () const |
| getPassID - Return the PassID number that corresponds to this pass. More... | |
| virtual bool | doFinalization (Module &) |
| doFinalization - Virtual method overriden by subclasses to do any necessary clean up after all passes have run. More... | |
| virtual void | print (raw_ostream &OS, const Module *M) const |
| print - Print out the internal state of the pass. More... | |
| 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) |
| getAdjustedAnalysisPointer - This method is used when a pass implements an analysis interface through multiple inheritance. More... | |
| 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. More... | |
| 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. More... | |
| bool | mustPreserveAnalysisID (char &AID) const |
| mustPreserveAnalysisID - This method serves the same function as getAnalysisIfAvailable, but works if you just have an AnalysisID. More... | |
| 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. More... | |
| template<typename AnalysisType > | |
| AnalysisType & | getAnalysis (Function &F) |
| getAnalysis<AnalysisType>() - This function is used by subclasses to get to the analysis information that they claim to use by overriding the getAnalysisUsage function. More... | |
| template<typename AnalysisType > | |
| AnalysisType & | getAnalysisID (AnalysisID PI) const |
| template<typename AnalysisType > | |
| AnalysisType & | getAnalysisID (AnalysisID PI, Function &F) |
Static Public Attributes | |
| static char | ID = 0 |
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) | |
| void | getAnalysisUsage (AnalysisUsage &AU) const override |
| getAnalysisUsage - Subclasses that override getAnalysisUsage must call this. More... | |
| 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. More... | |
Detailed Description
MachineBlockFrequencyInfo pass uses BlockFrequencyInfoImpl implementation to estimate machine basic block frequencies.
Definition at line 34 of file MachineBlockFrequencyInfo.h.
Constructor & Destructor Documentation
◆ MachineBlockFrequencyInfo()
| MachineBlockFrequencyInfo::MachineBlockFrequencyInfo | ( | ) |
Definition at line 171 of file MachineBlockFrequencyInfo.cpp.
References llvm::PassRegistry::getPassRegistry(), llvm::initializeMachineBlockFrequencyInfoPass(), and ~MachineBlockFrequencyInfo().
◆ ~MachineBlockFrequencyInfo()
|
overridedefault |
Referenced by MachineBlockFrequencyInfo().
Member Function Documentation
◆ calculate()
| void MachineBlockFrequencyInfo::calculate | ( | const MachineFunction & | F, |
| const MachineBranchProbabilityInfo & | MBPI, | ||
| const MachineLoopInfo & | MLI | ||
| ) |
calculate - compute block frequency info for the given function.
Definition at line 185 of file MachineBlockFrequencyInfo.cpp.
References llvm::dbgs(), llvm::StringRef::equals(), llvm::MachineFunction::getName(), llvm::GVDT_None, PrintBlockFreqFuncName, PrintMachineBlockFreq, view(), and ViewMachineBlockFreqPropagationDAG.
Referenced by runOnMachineFunction().
◆ getAnalysisUsage()
|
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 178 of file MachineBlockFrequencyInfo.cpp.
References llvm::AnalysisUsage::addRequired(), llvm::MachineFunctionPass::getAnalysisUsage(), and llvm::AnalysisUsage::setPreservesAll().
◆ getBlockFreq()
| BlockFrequency MachineBlockFrequencyInfo::getBlockFreq | ( | const MachineBasicBlock * | MBB | ) | const |
getblockFreq - Return block frequency.
Return 0 if we don't have the information. Please note that initial frequency is equal to 1024. It means that we should not rely on the value itself, but only on the comparison to the other block frequencies. We do this to avoid using of floating points.
Definition at line 221 of file MachineBlockFrequencyInfo.cpp.
Referenced by llvm::RegBankSelect::InstrInsertPoint::frequency(), llvm::RegBankSelect::MBBInsertPoint::frequency(), llvm::RegBankSelect::EdgeInsertPoint::frequency(), llvm::RegBankSelect::getAnalysisUsage(), llvm::LiveIntervals::getSpillWeight(), and giveUpWithRemarks().
◆ getBlockProfileCount()
| Optional< uint64_t > MachineBlockFrequencyInfo::getBlockProfileCount | ( | const MachineBasicBlock * | MBB | ) | const |
Definition at line 225 of file MachineBlockFrequencyInfo.cpp.
References F(), and llvm::None.
◆ getEntryFreq()
| uint64_t MachineBlockFrequencyInfo::getEntryFreq | ( | ) | const |
Definition at line 263 of file MachineBlockFrequencyInfo.cpp.
Referenced by getNumAllocatableRegsForConstraints(), and llvm::LiveIntervals::getSpillWeight().
◆ getFunction()
| const MachineFunction * MachineBlockFrequencyInfo::getFunction | ( | ) | const |
◆ getMBPI()
| const MachineBranchProbabilityInfo * MachineBlockFrequencyInfo::getMBPI | ( | ) | const |
Definition at line 247 of file MachineBlockFrequencyInfo.cpp.
◆ getProfileCountFromFreq()
| Optional< uint64_t > MachineBlockFrequencyInfo::getProfileCountFromFreq | ( | uint64_t | Freq | ) | const |
Definition at line 232 of file MachineBlockFrequencyInfo.cpp.
References F(), and llvm::None.
◆ isIrrLoopHeader()
| bool MachineBlockFrequencyInfo::isIrrLoopHeader | ( | const MachineBasicBlock * | MBB | ) |
Definition at line 238 of file MachineBlockFrequencyInfo.cpp.
References assert().
◆ printBlockFreq() [1/2]
| raw_ostream & MachineBlockFrequencyInfo::printBlockFreq | ( | raw_ostream & | OS, |
| const BlockFrequency | Freq | ||
| ) | const |
Definition at line 252 of file MachineBlockFrequencyInfo.cpp.
◆ printBlockFreq() [2/2]
| raw_ostream & MachineBlockFrequencyInfo::printBlockFreq | ( | raw_ostream & | OS, |
| const MachineBasicBlock * | MBB | ||
| ) | const |
Definition at line 258 of file MachineBlockFrequencyInfo.cpp.
◆ releaseMemory()
|
overridevirtual |
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 211 of file MachineBlockFrequencyInfo.cpp.
◆ runOnMachineFunction()
|
overridevirtual |
runOnMachineFunction - This method must be overloaded to perform the desired machine code transformation or analysis.
Implements llvm::MachineFunctionPass.
Definition at line 203 of file MachineBlockFrequencyInfo.cpp.
References calculate().
◆ view()
Pop up a ghostview window with the current block frequency propagation rendered using dot.
Definition at line 215 of file MachineBlockFrequencyInfo.cpp.
References ViewGraph().
Referenced by calculate().
Member Data Documentation
◆ ID
Definition at line 39 of file MachineBlockFrequencyInfo.h.
The documentation for this class was generated from the following files:
- include/llvm/CodeGen/MachineBlockFrequencyInfo.h
- lib/CodeGen/MachineBlockFrequencyInfo.cpp
