BFPostpassDRE Class Reference

#include <BFPostpassDRE.hh>

Inheritance diagram for BFPostpassDRE:

Collaboration diagram for BFPostpassDRE:

Public Member Functions
	BFPostpassDRE (BF2Scheduler &sched, MoveNode &mn)
bool	operator() () override
Public Member Functions inherited from BFKillNode
	BFKillNode (BF2Scheduler &sched, MoveNode &mn)
void	undoOnlyMe ()
Public Member Functions inherited from BFOptimization
	BFOptimization (BF2Scheduler &sched)
virtual bool	isFinishFront ()
virtual void	mightBeReady (MoveNode &mn)
Public Member Functions inherited from Reversible
virtual void	undo ()
virtual	~Reversible ()
void	deleteChildren (std::stack< Reversible * > &children)
int	id ()
	Reversible ()

Additional Inherited Members
Static Public Member Functions inherited from BFOptimization
static void	clearPrologMoves ()
static MoveNode *	getSisterTrigger (const MoveNode &mn, const TTAMachine::Machine &mach)
Protected Member Functions inherited from BFOptimization
DataDependenceGraph &	ddg ()
DataDependenceGraph *	rootDDG ()
const DataDependenceGraph &	ddg () const
DataDependenceGraph *	prologDDG ()
SimpleResourceManager &	rm () const
SimpleResourceManager *	prologRM () const
BUMoveNodeSelector &	selector ()
const TTAMachine::Machine &	targetMachine () const
unsigned int	ii () const
MoveNodeDuplicator &	duplicator () const
virtual bool	assign (int cycle, MoveNode &, const TTAMachine::Bus *bus=nullptr, const TTAMachine::FunctionUnit *srcFU_=nullptr, const TTAMachine::FunctionUnit *dstFU=nullptr, const TTAMachine::Bus *prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1, bool ignoreGuardWriteCycle=false)
virtual void	unassign (MoveNode &mn, bool disposePrologCopy=true)
virtual int	rmEC (int cycle, MoveNode &mn, const TTAMachine::Bus *bus=nullptr, const TTAMachine::FunctionUnit *srcFU=nullptr, const TTAMachine::FunctionUnit *dstFU=nullptr, const TTAMachine::Bus *prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1)
virtual int	rmLC (int cycle, MoveNode &mn, const TTAMachine::Bus *bus=nullptr, const TTAMachine::FunctionUnit *srcFU=nullptr, const TTAMachine::FunctionUnit *dstFU=nullptr, const TTAMachine::Bus *prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1)
virtual bool	canAssign (int cycle, MoveNode &mn, const TTAMachine::Bus *bus=nullptr, const TTAMachine::FunctionUnit *srcFU=nullptr, const TTAMachine::FunctionUnit *dstFU=nullptr, const TTAMachine::Bus *prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1, bool ignoreGWN=false)
bool	putAlsoToPrologEpilog (int cycle, MoveNode &mn)
void	setPrologSrcFUAnno (MoveNode &prologMN, MoveNode &loopMN)
void	setPrologDstFUAnno (MoveNode &prologMN, MoveNode &loopMN)
void	setJumpGuard (MoveNode &mn)
void	unsetJumpGuard (MoveNode &mn)
bool	needJumpGuard (const MoveNode &mn, int cycle)
int	jumpGuardAvailableCycle (const MoveNode &mn)
bool	canBeSpeculated (const Operation &op)
bool	canBeSpeculated (const MoveNode &mn)
bool	usePrologMove (const MoveNode &mn)
bool	canBeScheduled (const MoveNode &mn)
const TTAMachine::RegisterFile *	RFReadPortCountPreventsScheduling (const MoveNode &mn)
bool	immCountPreventsScheduling (const MoveNode &mn)
Protected Member Functions inherited from Reversible
bool	runPreChild (Reversible *preChild)
bool	runPostChild (Reversible *preChild)
bool	runChild (std::stack< Reversible * > &children, Reversible *child)
bool	runChild (Reversible *child, bool pre)
void	undoAndRemovePreChildren ()
void	undoAndRemovePostChildren ()
void	undoAndRemoveChildren (std::stack< Reversible * > &children)
Protected Attributes inherited from BFKillNode
DataDependenceGraph::EdgeSet	createdEdges_
MoveNode &	mn_
Protected Attributes inherited from BFOptimization
BF2Scheduler &	sched_
Protected Attributes inherited from Reversible
std::stack< Reversible * >	preChildren_
std::stack< Reversible * >	postChildren_
Static Protected Attributes inherited from BFOptimization
static std::map< MoveNode *, MoveNode *, MoveNode::Comparator >	prologMoves_

Detailed Description

Definition at line 42 of file BFPostpassDRE.hh.

Constructor & Destructor Documentation

BFPostpassDRE()

BFPostpassDRE::BFPostpassDRE ( BF2Scheduler &  sched, MoveNode &  mn  )

inline

Definition at line 44 of file BFPostpassDRE.hh.

                                                     :
        BFKillNode(sched, mn) {}

Member Function Documentation

operator()()

bool BFPostpassDRE::operator() ( )

overridevirtual

This performs the operation. Returns true if success, false if fail.

Reimplemented from BFKillNode.

Definition at line 44 of file BFPostpassDRE.cc.

                          {
    if (!sched_.killDeadResults() || targetMachine().alwaysWriteResults()) {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
        std::cerr << "\t\t\t\t\tdre forbidden!" << std::endl;
#endif
        return false;
    }
 
    if (ddg().resultUsed(mn_)) {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
        std::cerr << "\t\t\t\tresult is used!" << std::endl;
#endif
        return false;
    }
 
    // then remove
    createdEdges_ = ddg().copyDepsOver(mn_, true, false);
    ddg().dropNode(mn_);
    sched_.nodeAndCopyKilled(mn_);
    return true;
}

References DataDependenceGraph::copyDepsOver(), BFKillNode::createdEdges_, BFOptimization::ddg(), BoostGraph< GraphNode, GraphEdge >::dropNode(), BF2Scheduler::killDeadResults(), BFKillNode::mn_, BF2Scheduler::nodeAndCopyKilled(), BFOptimization::sched_, and BFOptimization::targetMachine().

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

• BFPostpassDRE.hh
• BFPostpassDRE.cc