LLVM: llvm::ARMBlockPlacement Class Reference (original) (raw)

Public Member Functions
	ARMBlockPlacement ()
bool	runOnMachineFunction (MachineFunction &MF) override
	runOnMachineFunction - This method must be overloaded to perform the desired machine code transformation or analysis.
void	moveBasicBlock (MachineBasicBlock BB, MachineBasicBlock Before)
bool	blockIsBefore (MachineBasicBlock BB, MachineBasicBlock Other)
bool	fixBackwardsWLS (MachineLoop *ML)
	Checks if loop has a backwards branching WLS, and if possible, fixes it.
bool	processPostOrderLoops (MachineLoop *ML)
	Updates ordering (of WLS BB and their loopExits) in inner loops first Returns true if any change was made in any of the loops.
bool	revertWhileToDoLoop (MachineInstr *WLS)
void	getAnalysisUsage (AnalysisUsage &AU) const override
	getAnalysisUsage - This function should be overriden by passes that need analysis information to do their job.
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
virtual StringRef	getPassName () const
	getPassName - Return a nice clean name for a pass.
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
AnalysisType *	getAnalysisIfAvailable () const
	getAnalysisIfAvailable() - 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
AnalysisType &	getAnalysis () const
	getAnalysis() - This function is used by subclasses to get to the analysis information that they claim to use by overriding the getAnalysisUsage function.
template
AnalysisType &	getAnalysis (Function &F, bool *Changed=nullptr)
	getAnalysis() - This function is used by subclasses to get to the analysis information that they claim to use by overriding the getAnalysisUsage function.
template
AnalysisType &	getAnalysisID (AnalysisID PI) const
template
AnalysisType &	getAnalysisID (AnalysisID PI, Function &F, bool *Changed=nullptr)

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.
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.

Definition at line 30 of file ARMBlockPlacement.cpp.

llvm::ARMBlockPlacement::ARMBlockPlacement ( )	inline

◆ blockIsBefore()

◆ fixBackwardsWLS()

Checks if loop has a backwards branching WLS, and if possible, fixes it.

This requires checking the predecessor (ie. preheader or it's predecessor) for a WLS and if its loopExit/target is before it. If moving the predecessor won't convert a WLS (to the predecessor) from a forward to a backward branching WLS, then move the predecessor block to before the loopExit/target.

Definition at line 154 of file ARMBlockPlacement.cpp.

References blockIsBefore(), llvm::dbgs(), DEBUG_PREFIX, findWLS(), llvm::MachineBasicBlock::getFullName(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::MachineInstr::getParent(), llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getPrevNode(), llvm::getWhileLoopStartTargetBB(), llvm::isWhileLoopStart(), LLVM_DEBUG, MBB, ML, and moveBasicBlock().