#include <def_use.h>

Inheritance diagram for P4::ComputeWriteSet:

Public Member Functions
	ComputeWriteSet (AllDefinitions allDefinitions, ReferenceMap refMap, TypeMap *typeMap)

bool	handleJump (const char tok, Definitions &defs)

bool	preorder (const IR::AbstractSlice *expression) override

bool	preorder (const IR::ArrayIndex *expression) override

bool	preorder (const IR::AssignmentStatement *statement) override

bool	preorder (const IR::BlockStatement *statement) override

bool	preorder (const IR::BreakStatement *statement) override

bool	preorder (const IR::ContinueStatement *statement) override

bool	preorder (const IR::DefaultExpression *expression) override

bool	preorder (const IR::EmptyStatement *statement) override

bool	preorder (const IR::ExitStatement *statement) override

bool	preorder (const IR::Expression *expression) override
	For expressions we maintain the write-set in the writes std::map.

bool	preorder (const IR::ForInStatement *statement) override

bool	preorder (const IR::ForStatement *statement) override

bool	preorder (const IR::Function *function) override

bool	preorder (const IR::HeaderStackExpression *expression) override

bool	preorder (const IR::IfStatement *statement) override

bool	preorder (const IR::InvalidHeader *expression) override

bool	preorder (const IR::InvalidHeaderUnion *expression) override

bool	preorder (const IR::ListExpression *expression) override

bool	preorder (const IR::Literal *expression) override

bool	preorder (const IR::Member *expression) override

bool	preorder (const IR::MethodCallExpression *expression) override

bool	preorder (const IR::MethodCallStatement *statement) override

bool	preorder (const IR::Mux *expression) override

bool	preorder (const IR::Operation_Binary *expression) override

bool	preorder (const IR::Operation_Unary *expression) override

bool	preorder (const IR::P4Action *action) override

bool	preorder (const IR::P4Control *control) override

bool	preorder (const IR::P4ListExpression *expression) override

bool	preorder (const IR::P4Parser *parser) override

bool	preorder (const IR::P4Table *table) override

bool	preorder (const IR::PathExpression *expression) override

bool	preorder (const IR::ReturnStatement *statement) override

bool	preorder (const IR::SelectExpression *expression) override

bool	preorder (const IR::StructExpression *expression) override

bool	preorder (const IR::SwitchStatement *statement) override

bool	preorder (const IR::TypeNameExpression *expression) override

const LocationSet *	writtenLocations (const IR::Expression *expression)

Public Member Functions inherited from P4::Inspector
const IR::Node *	apply_visitor (const IR::Node , const char name=0) override

profile_t	init_apply (const IR::Node *root) override

virtual void	loop_revisit (const IR::Node *)

virtual void	postorder (const IR::Node *)

virtual bool	preorder (const IR::Node *)

virtual void	revisit (const IR::Node *)

void	revisit_visited ()

bool	visit_in_progress (const IR::Node *n) const

void	visitAgain () const override

void	visitOnce () const override

Public Member Functions inherited from P4::Visitor
virtual bool	check_global (cstring)

virtual void	clear_globals ()

virtual Visitor *	clone () const

virtual ControlFlowVisitor *	controlFlowVisitor ()

virtual void	end_apply (const IR::Node *root)

virtual void	erase_global (cstring)

template<class T >
const T *	findContext () const

template<class T >
const T *	findContext (const Context *&c) const

template<class T >
const T *	findOrigCtxt () const

template<class T >
const T *	findOrigCtxt (const Context *&c) const

virtual Visitor &	flow_clone ()

virtual void	flow_merge (Visitor &)

virtual bool	flow_merge_closure (Visitor &)

virtual void	flow_merge_global_from (cstring)

virtual void	flow_merge_global_to (cstring)

const Context *	getChildContext () const

int	getChildrenVisited () const

const Context *	getContext () const

int	getContextDepth () const

const IR::Node *	getCurrentNode () const

template<class T >
const T *	getCurrentNode () const

const IR::Node *	getOriginal () const

template<class T >
const T *	getOriginal () const

template<class T >
const T *	getParent () const

virtual bool	has_flow_joins () const

profile_t	init_apply (const IR::Node root, const Context parent_context)

bool	isInContext (const IR::Node *n) const

virtual const char *	name () const

template<class T >
void	parallel_visit (const IR::Vector< T > &v, const char *name, int cidx)

template<class T >
void	parallel_visit (const IR::Vector< T > &v, const char *name=0)

template<class T >
void	parallel_visit (IR::Vector< T > &v, const char *name, int cidx)

template<class T >
void	parallel_visit (IR::Vector< T > &v, const char *name=0)

void	print_context () const

const Visitor &	setCalledBy (const Visitor *visitor)

void	setName (const char *name)

void	visit (const IR::Node &n, const char *name, int cidx)

void	visit (const IR::Node &n, const char *name=0)

void	visit (const IR::Node &n, const char name, int cidx)

void	visit (const IR::Node &n, const char name=0)

void	visit (const IR::Node const &n, const char name, int cidx)

void	visit (const IR::Node const &n, const char name=0)

void	visit (IR::Node &n, const char *name, int cidx)

void	visit (IR::Node &n, const char *name=0)

void	visit (IR::Node &, const char =0, int=0)

template<class T , typename = std::enable_if_t<Util::has_SourceInfo_v<T> && !std::is_pointer_v<T>>, class... Args>
void	warn (const int kind, const char *format, const T &node, Args &&...args)
	The const ref variant of the above.

template<class T , typename = std::enable_if_t<Util::has_SourceInfo_v<T>>, class... Args>
void	warn (const int kind, const char format, const T node, Args &&...args)

bool	warning_enabled (int warning_kind) const

Public Member Functions inherited from P4::IHasDbPrint
void	print () const

Protected Member Functions
	ComputeWriteSet (const ComputeWriteSet source, ProgramPoint context, Definitions definitions, std::unordered_set< loc_t > &cached_locs)

void	dbprint (std::ostream &out) const override

void	end_apply () override

void	enterScope (const IR::ParameterList parameters, const IR::IndexedVector< IR::Declaration > locals, ProgramPoint startPoint, bool clear=true)

void	exitScope (const IR::ParameterList parameters, const IR::IndexedVector< IR::Declaration > locals, ProgramPoint endPoint)

void	expressionWrites (const IR::Expression expression, const LocationSet loc)

Definitions *	getDefinitionsAfter (const IR::ParserState *state)

const loc_t *	getLoc (const IR::Node n, const loc_t parentLoc)

const loc_t *	getLoc (const IR::Node n, const Visitor::Context ctxt)

const loc_t *	getLoc (const Visitor::Context *ctxt)

ProgramPoint	getProgramPoint (const IR::Node *node=nullptr) const

const LocationSet *	getWrites (const IR::Expression *expression)

const LocationSet *	getWrites (const IR::Expression expression, const loc_t parentLoc)

profile_t	init_apply (const IR::Node *root) override

bool	setDefinitions (Definitions defs, const IR::Node who=nullptr, bool overwrite=false)

void	visitVirtualMethods (const IR::IndexedVector< IR::Declaration > &locals)
	Statements and other control structures.

Protected Member Functions inherited from P4::Visitor
virtual void	init_join_flows (const IR::Node *)

virtual bool	join_flows (const IR::Node *)

virtual void	post_join_flows (const IR::Node , const IR::Node )

void	visit_children (const IR::Node *, std::function< void()> fn)

Protected Attributes
AllDefinitions *	allDefinitions

Definitions *	breakDefinitions = nullptr
	Definitions after exit statements.

ProgramPoint	callingContext
	Definitions at continue statements.

Definitions *	continueDefinitions = nullptr
	Definitions at break statements.

Definitions *	currentDefinitions
	Result computed by this pass.

Definitions *	exitDefinitions
	Definitions after return statements.

bool	lhs
	if true we are processing an expression on the lhs of an assignment

AllocTrace	memuse
	True if we are analyzing a virtual method.

alloc_trace_cb_t	nested_trace

ReferenceMap *	refMap

Definitions *	returnedDefinitions
	Before statement currently processed.

TypeMap *	typeMap

bool	virtualMethod

hvec_map< loc_t, const LocationSet * >	writes
	For each program location the location set it writes.

Protected Attributes inherited from P4::Visitor
bool	dontForwardChildrenBeforePreorder = false

bool	joinFlows = false

bool	visitDagOnce = true

Static Protected Attributes
static int	nest_count = 0

Additional Inherited Members
Public Types inherited from P4::Visitor
typedef Visitor_Context	Context

Static Public Member Functions inherited from P4::Visitor
static cstring	demangle (const char *)

static bool	warning_enabled (const Visitor *visitor, int warning_kind)

Public Attributes inherited from P4::Visitor
const Visitor *	called_by = nullptr

cstring	internalName

SplitFlowVisit_base *&	split_link

SplitFlowVisit_base *	split_link_mem = nullptr

Detailed Description

Computes the write set for each expression and statement.

This pass is run for each parser and control separately. It controls precisely the visit order — to simulate a symbolic execution of the program.

Precondition: Must be executed after variable initializers have been removed.

Constructor & Destructor Documentation

◆ ComputeWriteSet()

P4::ComputeWriteSet::ComputeWriteSet	(	const ComputeWriteSet *	source,
		ProgramPoint	context,
		Definitions *	definitions,
		std::unordered_set< loc_t > &	cached_locs )

inlineprotected

Creates new visitor, but with same underlying data structures. Needed to visit some program fragments repeatedly.

Member Function Documentation

◆ dbprint()

void P4::ComputeWriteSet::dbprint ( std::ostream & out ) const

inlineoverrideprotectedvirtual

Implements P4::IHasDbPrint.

◆ end_apply()

void P4::ComputeWriteSet::end_apply ( )

inlineoverrideprotectedvirtual

Reimplemented from P4::Visitor.

◆ init_apply()

profile_t P4::ComputeWriteSet::init_apply ( const IR::Node * root )

inlineoverrideprotectedvirtual

Reimplemented from P4::Visitor.

Public Member Functions

Protected Member Functions

Protected Attributes

Static Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ComputeWriteSet()

Member Function Documentation

◆ dbprint()

◆ end_apply()

◆ init_apply()