Class performing some optimizations exploiting the reduction of BB with n inputs and m outputs. More...

#include <multiple_entry_if_reduction.hpp>

Inheritance diagram for MultipleEntryIfReduction:

Collaboration diagram for MultipleEntryIfReduction:

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Public Member Functions
	MultipleEntryIfReduction (const ParameterConstRef _Param, const application_managerRef _AppM, unsigned int function_id, const DesignFlowManagerConstRef design_flow_manager)
	Constructor. More...

	~MultipleEntryIfReduction () override
	Destructor. More...

DesignFlowStep_Status	InternalExec () override
	Extract patterns from the IR. More...

void	Initialize () override
	Initialize the step (i.e., like a constructor, but executed just before exec. More...

bool	HasToBeExecuted () const override
	Check if this step has actually to be executed. More...

Public Member Functions inherited from FunctionFrontendFlowStep
	FunctionFrontendFlowStep (const application_managerRef AppM, const unsigned int function_id, const FrontendFlowStepType frontend_flow_step_type, const DesignFlowManagerConstRef design_flow_manager, const ParameterConstRef parameters)
	Constructor. More...

	~FunctionFrontendFlowStep () override
	Destructor. More...

void	ComputeRelationships (DesignFlowStepSet &relationship, const DesignFlowStep::RelationshipType relationship_type) override
	Compute the relationships of a step with other steps. More...

std::string	GetSignature () const override
	Return the signature of this step. More...

std::string	GetName () const override
	Return the name of this design step. More...

DesignFlowStep_Status	Exec () final
	Execute the step. More...

unsigned int	CGetBBVersion () const

unsigned int	GetBitValueVersion () const

void	PrintInitialIR () const override
	Dump the initial intermediate representation. More...

void	PrintFinalIR () const override
	Dump the final intermediate representation. More...

Public Member Functions inherited from FrontendFlowStep
	FrontendFlowStep (const application_managerRef AppM, const FrontendFlowStepType frontend_flow_step_type, const DesignFlowManagerConstRef design_flow_manager, const ParameterConstRef parameters)
	Constructor. More...

	~FrontendFlowStep () override
	Destructor. More...

virtual std::string	GetKindText () const
	Return the name of the type of this frontend flow step. More...

DesignFlowStepFactoryConstRef	CGetDesignFlowStepFactory () const override
	Return the factory to create this type of steps. More...

void	PrintTreeManager (const bool before) const
	Dump the tree manager. More...

Public Member Functions inherited from DesignFlowStep
	DesignFlowStep (const DesignFlowManagerConstRef design_flow_manager, const ParameterConstRef parameters)
	Constructor. More...

virtual	~DesignFlowStep ()
	Destructor. More...

DesignFlowStep_Status	GetStatus () const
	Return the status of this design step. More...

virtual void	WriteDot (std::ostream &out) const
	Write the label for a dot graph. More...

bool	IsComposed () const
	Returns if this step is composed. More...

int	CGetDebugLevel () const
	Return the debug level of the step. More...

Private Member Functions
double	GetAreaCost (const std::list< tree_nodeRef > &list_of_stmt) const
	Estimate the area cost of the statements of a basic block. More...

const CustomUnorderedSet< std::pair< FrontendFlowStepType, FunctionRelationship > >	ComputeFrontendRelationships (const DesignFlowStep::RelationshipType relationship_type) const override
	Return the set of analyses in relationship with this design step. More...

Private Attributes
tree_managerRef	TM
	The tree manager. More...

tree_manipulationRef	tree_man
	The tree manipulation. More...

statement_list *	sl {nullptr}
	The statement list. More...

bool	bb_modified {false}
	Modified file. More...

ScheduleRef	schedule
	The scheduling solution. More...

AllocationInformationConstRef	allocation_information
	The allocation information. More...

Additional Inherited Members
Public Types inherited from FrontendFlowStep
using	FunctionRelationship = enum { ALL_FUNCTIONS, CALLED_FUNCTIONS, CALLING_FUNCTIONS, SAME_FUNCTION, WHOLE_APPLICATION }
	The different relationship type between function analysis. More...

Public Types inherited from DesignFlowStep
enum	RelationshipType { DEPENDENCE_RELATIONSHIP, INVALIDATION_RELATIONSHIP, PRECEDENCE_RELATIONSHIP }
	The relationship type. More...

Static Public Member Functions inherited from FunctionFrontendFlowStep
static const std::string	ComputeSignature (const FrontendFlowStepType frontend_flow_step_type, const unsigned int function_id)
	Compute the signature of a function frontend flow step. More...

Static Public Member Functions inherited from FrontendFlowStep
static void	CreateSteps (const DesignFlowManagerConstRef design_flow_manager, const CustomUnorderedSet< std::pair< FrontendFlowStepType, FunctionRelationship >> &frontend_relationships, const application_managerConstRef application_manager, DesignFlowStepSet &relationships)
	Create the relationship steps of a step with other steps starting from already specified dependencies between frontend flow steps. More...

static const std::string	EnumToKindText (const FrontendFlowStepType frontend_flow_step_type)
	Given a frontend flow step type, return the name of the type. More...

Protected Member Functions inherited from FunctionFrontendFlowStep
void	WriteBBGraphDot (const std::string &filename) const
	Write the current version of statement list in dot format. More...

Protected Attributes inherited from FunctionFrontendFlowStep
const FunctionBehaviorRef	function_behavior
	The function behavior of the function to be analyzed. More...

const unsigned int	function_id
	The index of the function to be analyzed. More...

unsigned int	bb_version
	The version of the basic block intermediate representation on which this step has been applied. More...

unsigned int	bitvalue_version
	The version of the bitvalue information on which this step has been applied. More...

Protected Attributes inherited from FrontendFlowStep
const application_managerRef	AppM
	The application manager. More...

const FrontendFlowStepType	frontend_flow_step_type
	The type of this step. More...

unsigned int	print_counter
	Print counter. More...

Protected Attributes inherited from DesignFlowStep
bool	composed
	True if this step represents a composition of design flow steps (e.g., a flow); must be set by specialized constructors. More...

const Wrefcount< const DesignFlowManager >	design_flow_manager
	The design flow manager. More...

const ParameterConstRef	parameters
	Set of input parameters. More...

int	debug_level
	The debug level. More...

const int	output_level
	The output level. More...

Detailed Description

Class performing some optimizations exploiting the reduction of BB with n inputs and m outputs.

The block have to contain only phi or conditional statements (such as if and multi way if)

Definition at line 101 of file multiple_entry_if_reduction.hpp.

Constructor & Destructor Documentation

◆ MultipleEntryIfReduction()

MultipleEntryIfReduction::MultipleEntryIfReduction	(	const ParameterConstRef	_Param,
		const application_managerRef	_AppM,
		unsigned int	function_id,
		const DesignFlowManagerConstRef	design_flow_manager
	)

Constructor.

Parameters

_Param	is the set of the parameters
_AppM	is the application manager
function_id	is the identifier of the function
design_flow_manager	is the design flow manager

Definition at line 118 of file multiple_entry_if_reduction.cpp.

References DesignFlowStep::debug_level, DEBUG_LEVEL_NONE, GET_CLASS, DesignFlowStep::parameters, and ~MultipleEntryIfReduction().

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◆ ~MultipleEntryIfReduction()

MultipleEntryIfReduction::~MultipleEntryIfReduction ( )

overridedefault

Destructor.

Referenced by MultipleEntryIfReduction().

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Member Function Documentation

◆ ComputeFrontendRelationships()

const CustomUnorderedSet< std::pair< FrontendFlowStepType, FrontendFlowStep::FunctionRelationship > > MultipleEntryIfReduction::ComputeFrontendRelationships ( const DesignFlowStep::RelationshipType relationship_type ) const

overrideprivatevirtual

Return the set of analyses in relationship with this design step.

Parameters

relationship_type is the type of relationship to be considered

Implements FrontendFlowStep.

Definition at line 129 of file multiple_entry_if_reduction.cpp.

References ABORTED, DesignFlowStep::DEPENDENCE_RELATIONSHIP, EMPTY, DesignFlowStep::GetStatus(), DesignFlowStep::INVALIDATION_RELATIONSHIP, NONEXISTENT, DesignFlowStep::PRECEDENCE_RELATIONSHIP, SAME_FUNCTION, SKIPPED, SUCCESS, THROW_UNREACHABLE, UNCHANGED, UNEXECUTED, and UNNECESSARY.

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◆ GetAreaCost()

double MultipleEntryIfReduction::GetAreaCost ( const std::list< tree_nodeRef > & list_of_stmt ) const

private

Estimate the area cost of the statements of a basic block.

Definition at line 1058 of file multiple_entry_if_reduction.cpp.

References allocation_information, DesignFlowStep::debug_level, DEBUG_LEVEL_VERY_PEDANTIC, AllocationInformation::GetStatementArea(), INDENT_DBG_MEX, and STR.

Referenced by InternalExec().

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◆ HasToBeExecuted()

bool MultipleEntryIfReduction::HasToBeExecuted ( ) const

overridevirtual

Check if this step has actually to be executed.

Returns: true if the step has to be executed

Reimplemented from FunctionFrontendFlowStep.

Definition at line 178 of file multiple_entry_if_reduction.cpp.

References FunctionFrontendFlowStep::ComputeSignature(), DesignFlowStep::design_flow_manager, FunctionFrontendFlowStep::function_id, Wrefcount< T >::lock(), and DesignFlowStep::parameters.

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◆ Initialize()

void MultipleEntryIfReduction::Initialize ( )

overridevirtual

Initialize the step (i.e., like a constructor, but executed just before exec.

Reimplemented from DesignFlowStep.

Definition at line 195 of file multiple_entry_if_reduction.cpp.

References allocation_information, FrontendFlowStep::AppM, bb_modified, tree_manager::CGetTreeNode(), FunctionFrontendFlowStep::function_id, GET_NODE, DesignFlowStep::parameters, sl, TM, and tree_man.

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◆ InternalExec()

DesignFlowStep_Status MultipleEntryIfReduction::InternalExec ( )

overridevirtual

Extract patterns from the IR.

Returns: the exit status of this step

if the operation had been done

list to save the block to eliminate after the reduction

The basic block graphs

Analyze if a basic block is a possible candidate

We skip basic block containing gimple_call since it would require modification of the call graph

Skip headers

The index of the loop to be considered (the most internal loops which contains the definition and all the uses

The depth of the loop to be considered

Create the copies

Fixing phi: duplicating def_edge of ssa name which are not defined in the current bb

Build list of phis + gimple_nodes

The ssa defined by the statement (left part of gimple assignment and vdef)

The set of basic block uses

The set of statement uses

The set of reaching definition

Cache of created phi - first key is the used ssa - second key is the basic block where is created

Duplicating statement

Defined in a different basic block

The old ssa

Management of vuses for overwrite

Use is in the considered loop

Use is in a more nested loop

Use is in a less nested loop

Set of basic blocks belonging to the loop

Check if there a use of the ssa in the header; if not basic blocks after uses can be removed

Remove all basic blocks from which no use can be reached

Set of basic blocks to be analyzed

True if different definitions reach this bb from all the bbs

If this is the basic block contains a use

If the basic block is the source of a feedback edge, fix the phi in the header

endfor-list_of_bloc

eliminate the blocks (remove them from the tree)

Implements FunctionFrontendFlowStep.

Definition at line 209 of file multiple_entry_if_reduction.cpp.

References FrontendFlowStep::AppM, FunctionBehavior::BB, BB_EXIT, block::block(), tree_manager::CGetTreeNode(), tree_manager::CGetTreeReindex(), tree_helper::CGetType(), tree_helper::ComputeSsaUses(), tree_manipulation::create_phi_node(), tree_manipulation::create_ssa_name(), DesignFlowStep::debug_level, DEBUG_LEVEL_VERY_PEDANTIC, FB_CFG_SELECTOR, FunctionBehavior::FBB, FunctionFrontendFlowStep::function_behavior, FunctionFrontendFlowStep::function_id, GET_CONST_NODE, GET_NODE, GetAreaCost(), FunctionFrontendFlowStep::GetName(), tree_manager::GetTreeNode(), tree_manager::GetTreeReindex(), INDENT_DBG_MEX, index, tree_node::index, statement_list::list_of_bloc, max, DesignFlowStep::parameters, phi, tree_manager::ReplaceTreeNode(), sl, STR, SUCCESS, lenet_tvm::target, THROW_ASSERT, THROW_UNREACHABLE, TM, tree_man, and UNCHANGED.

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Field Documentation

◆ allocation_information

AllocationInformationConstRef MultipleEntryIfReduction::allocation_information

private

The allocation information.

Definition at line 120 of file multiple_entry_if_reduction.hpp.

Referenced by GetAreaCost(), and Initialize().

◆ bb_modified

bool MultipleEntryIfReduction::bb_modified {false}

private

Modified file.

Definition at line 114 of file multiple_entry_if_reduction.hpp.

Referenced by Initialize().

◆ schedule

ScheduleRef MultipleEntryIfReduction::schedule

private

The scheduling solution.

Definition at line 117 of file multiple_entry_if_reduction.hpp.

◆ sl

statement_list* MultipleEntryIfReduction::sl {nullptr}

private

The statement list.

Definition at line 111 of file multiple_entry_if_reduction.hpp.

Referenced by Initialize(), and InternalExec().

◆ TM

tree_managerRef MultipleEntryIfReduction::TM

private

The tree manager.

Definition at line 105 of file multiple_entry_if_reduction.hpp.

Referenced by Initialize(), and InternalExec().

◆ tree_man

tree_manipulationRef MultipleEntryIfReduction::tree_man

private

The tree manipulation.

Definition at line 108 of file multiple_entry_if_reduction.hpp.

Referenced by Initialize(), and InternalExec().

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

/workspace/src/frontend_analysis/IR_analysis/multiple_entry_if_reduction.hpp
/workspace/src/frontend_analysis/IR_analysis/multiple_entry_if_reduction.cpp

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ MultipleEntryIfReduction()

◆ ~MultipleEntryIfReduction()

Member Function Documentation

◆ ComputeFrontendRelationships()

◆ GetAreaCost()

◆ HasToBeExecuted()

◆ Initialize()

◆ InternalExec()

Field Documentation

◆ allocation_information

◆ bb_modified

◆ schedule

◆ sl

◆ TM

◆ tree_man