#include <cond_expr_restructuring.hpp>

Inheritance diagram for CondExprRestructuring:

Collaboration diagram for CondExprRestructuring:

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Public Member Functions
	CondExprRestructuring (const application_managerRef AppM, unsigned int function_id, const DesignFlowManagerConstRef design_flow_manager, const ParameterConstRef parameters)
	Constructor. More...

	~CondExprRestructuring () override
	Destructor. More...

DesignFlowStep_Status	InternalExec () override
	Performs the loops analysis. 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
bool	IsCondExprGimple (const tree_nodeConstRef tn) const
	Return true if tree node is a gimple_assign with a cond_expr in the right part. More...

tree_nodeRef	IsCondExprChain (const tree_nodeConstRef tn, const bool first, bool is_third_node) const
	Given a gimple_assign with cond_expr in the right part and one of its operand it checks: 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
ScheduleRef	schedule
	The schedule. More...

AllocationInformationRef	allocation_information
	The allocation information. More...

tree_managerRef	TM
	The tree manager. 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

Definition at line 55 of file cond_expr_restructuring.hpp.

Constructor & Destructor Documentation

◆ CondExprRestructuring()

CondExprRestructuring::CondExprRestructuring	(	const application_managerRef	AppM,
		unsigned int	function_id,
		const DesignFlowManagerConstRef	design_flow_manager,
		const ParameterConstRef	parameters
	)

Constructor.

Parameters

AppM	is the application manager
function_id	is the node id of the function analyzed.
design_flow_manager	is the design flow manager
parameters	is the set of input parameters

Definition at line 84 of file cond_expr_restructuring.cpp.

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

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◆ ~CondExprRestructuring()

CondExprRestructuring::~CondExprRestructuring ( )

overridedefault

Destructor.

Referenced by CondExprRestructuring().

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Member Function Documentation

◆ ComputeFrontendRelationships()

const CustomUnorderedSet< std::pair< FrontendFlowStepType, FrontendFlowStep::FunctionRelationship > > CondExprRestructuring::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

Not executed

If schedule is not up to date, do not execute this step and invalidate UpdateSchedule

Implements FrontendFlowStep.

Definition at line 95 of file cond_expr_restructuring.cpp.

References FrontendFlowStep::AppM, FunctionFrontendFlowStep::CGetBBVersion(), FunctionFrontendFlowStep::ComputeSignature(), DesignFlowStep::DEPENDENCE_RELATIONSHIP, DesignFlowStep::design_flow_manager, FunctionFrontendFlowStep::function_behavior, FunctionFrontendFlowStep::function_id, DesignFlowStep::GetStatus(), DesignFlowStep::INVALIDATION_RELATIONSHIP, Wrefcount< T >::lock(), DesignFlowStep::parameters, DesignFlowStep::PRECEDENCE_RELATIONSHIP, SAME_FUNCTION, SUCCESS, and THROW_UNREACHABLE.

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◆ HasToBeExecuted()

bool CondExprRestructuring::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 149 of file cond_expr_restructuring.cpp.

References FrontendFlowStep::AppM, FunctionFrontendFlowStep::CGetBBVersion(), FunctionFrontendFlowStep::ComputeSignature(), DesignFlowStep::design_flow_manager, FunctionFrontendFlowStep::function_behavior, FunctionFrontendFlowStep::function_id, FunctionFrontendFlowStep::HasToBeExecuted(), Wrefcount< T >::lock(), and DesignFlowStep::parameters.

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◆ Initialize()

void CondExprRestructuring::Initialize ( )

overridevirtual

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

Reimplemented from DesignFlowStep.

Definition at line 189 of file cond_expr_restructuring.cpp.

References allocation_information, FrontendFlowStep::AppM, FunctionFrontendFlowStep::function_id, DesignFlowStep::Initialize(), schedule, and TM.

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◆ InternalExec()

DesignFlowStep_Status CondExprRestructuring::InternalExec ( )

overridevirtual

Performs the loops analysis.

Check if new ending time would not be larger The time in which last operand is ready

As cond expr time we consider the worst among the existing operation in the chain

Inserting first cond expr after the last one

Create the ssa in the left part

Create the assign

Set the bit value for the intermediate ssa to correctly update execution time

simplified version

we are going to create a LUT

Inserting last cond expr

Create the assign

Check that the second cond expr is actually dead

Remove the intermediate cond_expr

Removing added statements

Adding old statements

Recomputing schedule

Setting pointer to the previous element

Restarting

Implements FunctionFrontendFlowStep.

Definition at line 200 of file cond_expr_restructuring.cpp.

References allocation_information, FrontendFlowStep::AppM, BUILTIN_SRCP, tree_manager::CGetTreeNode(), tree_helper::CGetType(), counter, tree_manager::CreateUniqueIntegerCst(), DesignFlowStep::debug_level, DEBUG_LEVEL_VERY_PEDANTIC, EPSILON, FunctionFrontendFlowStep::function_behavior, FunctionFrontendFlowStep::function_id, GET_CONST_NODE, Schedule::get_cstep(), GET_INDEX_CONST_NODE, GET_INDEX_NODE, GET_NODE, AllocationInformation::GetConnectionTime(), Schedule::GetEndingTime(), FunctionFrontendFlowStep::GetName(), AllocationInformation::GetTimeLatency(), INDENT_DBG_MEX, tree_node::index, IsCondExprChain(), IsCondExprGimple(), max, DesignFlowStep::parameters, schedule, sl, STR, SUCCESS, THROW_ASSERT, TM, ToString(), UNCHANGED, fu_binding::UNKNOWN, Schedule::UpdateTime(), and FunctionFrontendFlowStep::WriteBBGraphDot().

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◆ IsCondExprChain()

tree_nodeRef CondExprRestructuring::IsCondExprChain	(	const tree_nodeConstRef	tn,
		const bool	first,
		bool	is_third_node
	)		const

private

Given a gimple_assign with cond_expr in the right part and one of its operand it checks:

if operand is a ssa_name
if operand is defined in the same basic block
if operand is defined in a gimple_assign whose right a part is another cond_expr
if operand is on the relative critical path (i.e., it delays execution of tn
Parameters

tn is the starting gimple_assign

first is true if first operand has to be considered, false if second oeprand has to be considered

Returns
the chained gimple_assignment if all conditions hold