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Public Member Functions | Static Public Member Functions | Private Types | Private Member Functions | Private Attributes | List of all members
retdec::llvmir2hll::SimpleAliasAnalysis Class Reference

A very simple alias analysis. More...

#include <simple_alias_analysis.h>

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Public Member Functions

virtual void init (ShPtr< Module > module) override
 Initializes the analysis. More...
 
virtual std::string getId () const override
 Returns the ID of the analysis. More...
 
virtual const VarSetmayPointTo (ShPtr< Variable > var) const override
 Returns the set of variables to which var may point to. More...
 
virtual ShPtr< VariablepointsTo (ShPtr< Variable > var) const override
 Returns the variable to which var always points. More...
 
virtual bool mayBePointed (ShPtr< Variable > var) const override
 Returns true if a pointer may point to var, false otherwise. More...
 
- Public Member Functions inherited from retdec::llvmir2hll::AliasAnalysis
virtual ~AliasAnalysis ()=default
 
virtual bool isInitialized () const
 Returns true if the analysis has been initialized, false otherwise. More...
 

Static Public Member Functions

static ShPtr< AliasAnalysiscreate ()
 Creates a new alias analysis. More...
 

Private Types

using FuncVarSetMap = std::map< ShPtr< Function >, VarSet >
 Mapping of a function into a set of variables. More...
 
using VarFuncMap = std::map< ShPtr< Variable >, ShPtr< Function > >
 Mapping of a variable into a function. More...
 

Private Member Functions

 SimpleAliasAnalysis ()
 Constructs a new analysis. More...
 
Visitor Interface
virtual void visit (ShPtr< AddressOpExpr > expr) override
 
virtual void visit (ShPtr< GlobalVarDef > varDef) override
 
virtual void visit (ShPtr< Function > func) override
 
virtual void visit (ShPtr< AssignStmt > stmt) override
 
virtual void visit (ShPtr< BreakStmt > stmt) override
 
virtual void visit (ShPtr< CallStmt > stmt) override
 
virtual void visit (ShPtr< ContinueStmt > stmt) override
 
virtual void visit (ShPtr< EmptyStmt > stmt) override
 
virtual void visit (ShPtr< ForLoopStmt > stmt) override
 
virtual void visit (ShPtr< UForLoopStmt > stmt) override
 
virtual void visit (ShPtr< GotoStmt > stmt) override
 
virtual void visit (ShPtr< IfStmt > stmt) override
 
virtual void visit (ShPtr< ReturnStmt > stmt) override
 
virtual void visit (ShPtr< SwitchStmt > stmt) override
 
virtual void visit (ShPtr< UnreachableStmt > stmt) override
 
virtual void visit (ShPtr< VarDefStmt > stmt) override
 
virtual void visit (ShPtr< WhileLoopStmt > stmt) override
 
virtual void visit (ShPtr< AddOpExpr > expr) override
 
virtual void visit (ShPtr< AddressOpExpr > expr) override
 
virtual void visit (ShPtr< AndOpExpr > expr) override
 
virtual void visit (ShPtr< ArrayIndexOpExpr > expr) override
 
virtual void visit (ShPtr< AssignOpExpr > expr) override
 
virtual void visit (ShPtr< BitAndOpExpr > expr) override
 
virtual void visit (ShPtr< BitOrOpExpr > expr) override
 
virtual void visit (ShPtr< BitShlOpExpr > expr) override
 
virtual void visit (ShPtr< BitShrOpExpr > expr) override
 
virtual void visit (ShPtr< BitXorOpExpr > expr) override
 
virtual void visit (ShPtr< CallExpr > expr) override
 
virtual void visit (ShPtr< CommaOpExpr > expr) override
 
virtual void visit (ShPtr< DerefOpExpr > expr) override
 
virtual void visit (ShPtr< DivOpExpr > expr) override
 
virtual void visit (ShPtr< EqOpExpr > expr) override
 
virtual void visit (ShPtr< GtEqOpExpr > expr) override
 
virtual void visit (ShPtr< GtOpExpr > expr) override
 
virtual void visit (ShPtr< LtEqOpExpr > expr) override
 
virtual void visit (ShPtr< LtOpExpr > expr) override
 
virtual void visit (ShPtr< ModOpExpr > expr) override
 
virtual void visit (ShPtr< MulOpExpr > expr) override
 
virtual void visit (ShPtr< NegOpExpr > expr) override
 
virtual void visit (ShPtr< NeqOpExpr > expr) override
 
virtual void visit (ShPtr< NotOpExpr > expr) override
 
virtual void visit (ShPtr< OrOpExpr > expr) override
 
virtual void visit (ShPtr< StructIndexOpExpr > expr) override
 
virtual void visit (ShPtr< SubOpExpr > expr) override
 
virtual void visit (ShPtr< TernaryOpExpr > expr) override
 
virtual void visit (ShPtr< Variable > var) override
 
virtual void visit (ShPtr< BitCastExpr > expr) override
 
virtual void visit (ShPtr< ExtCastExpr > expr) override
 
virtual void visit (ShPtr< FPToIntCastExpr > expr) override
 
virtual void visit (ShPtr< IntToFPCastExpr > expr) override
 
virtual void visit (ShPtr< IntToPtrCastExpr > expr) override
 
virtual void visit (ShPtr< PtrToIntCastExpr > expr) override
 
virtual void visit (ShPtr< TruncCastExpr > expr) override
 
virtual void visit (ShPtr< ConstArray > constant) override
 
virtual void visit (ShPtr< ConstBool > constant) override
 
virtual void visit (ShPtr< ConstFloat > constant) override
 
virtual void visit (ShPtr< ConstInt > constant) override
 
virtual void visit (ShPtr< ConstNullPointer > constant) override
 
virtual void visit (ShPtr< ConstString > constant) override
 
virtual void visit (ShPtr< ConstStruct > constant) override
 
virtual void visit (ShPtr< ConstSymbol > constant) override
 
virtual void visit (ShPtr< ArrayType > type) override
 
virtual void visit (ShPtr< FloatType > type) override
 
virtual void visit (ShPtr< IntType > type) override
 
virtual void visit (ShPtr< PointerType > type) override
 
virtual void visit (ShPtr< StringType > type) override
 
virtual void visit (ShPtr< StructType > type) override
 
virtual void visit (ShPtr< FunctionType > type) override
 
virtual void visit (ShPtr< VoidType > type) override
 
virtual void visit (ShPtr< UnknownType > type) override
 
- Private Member Functions inherited from retdec::llvmir2hll::OrderedAllVisitor
virtual void visit (ShPtr< GlobalVarDef > varDef) override
 
virtual void visit (ShPtr< Function > func) override
 
virtual void visit (ShPtr< AssignStmt > stmt) override
 
virtual void visit (ShPtr< BreakStmt > stmt) override
 
virtual void visit (ShPtr< CallStmt > stmt) override
 
virtual void visit (ShPtr< ContinueStmt > stmt) override
 
virtual void visit (ShPtr< EmptyStmt > stmt) override
 
virtual void visit (ShPtr< ForLoopStmt > stmt) override
 
virtual void visit (ShPtr< UForLoopStmt > stmt) override
 
virtual void visit (ShPtr< GotoStmt > stmt) override
 
virtual void visit (ShPtr< IfStmt > stmt) override
 
virtual void visit (ShPtr< ReturnStmt > stmt) override
 
virtual void visit (ShPtr< SwitchStmt > stmt) override
 
virtual void visit (ShPtr< UnreachableStmt > stmt) override
 
virtual void visit (ShPtr< VarDefStmt > stmt) override
 
virtual void visit (ShPtr< WhileLoopStmt > stmt) override
 
virtual void visit (ShPtr< AddOpExpr > expr) override
 
virtual void visit (ShPtr< AndOpExpr > expr) override
 
virtual void visit (ShPtr< ArrayIndexOpExpr > expr) override
 
virtual void visit (ShPtr< AssignOpExpr > expr) override
 
virtual void visit (ShPtr< BitAndOpExpr > expr) override
 
virtual void visit (ShPtr< BitOrOpExpr > expr) override
 
virtual void visit (ShPtr< BitShlOpExpr > expr) override
 
virtual void visit (ShPtr< BitShrOpExpr > expr) override
 
virtual void visit (ShPtr< BitXorOpExpr > expr) override
 
virtual void visit (ShPtr< CallExpr > expr) override
 
virtual void visit (ShPtr< CommaOpExpr > expr) override
 
virtual void visit (ShPtr< DerefOpExpr > expr) override
 
virtual void visit (ShPtr< DivOpExpr > expr) override
 
virtual void visit (ShPtr< EqOpExpr > expr) override
 
virtual void visit (ShPtr< GtEqOpExpr > expr) override
 
virtual void visit (ShPtr< GtOpExpr > expr) override
 
virtual void visit (ShPtr< LtEqOpExpr > expr) override
 
virtual void visit (ShPtr< LtOpExpr > expr) override
 
virtual void visit (ShPtr< ModOpExpr > expr) override
 
virtual void visit (ShPtr< MulOpExpr > expr) override
 
virtual void visit (ShPtr< NegOpExpr > expr) override
 
virtual void visit (ShPtr< NeqOpExpr > expr) override
 
virtual void visit (ShPtr< NotOpExpr > expr) override
 
virtual void visit (ShPtr< OrOpExpr > expr) override
 
virtual void visit (ShPtr< StructIndexOpExpr > expr) override
 
virtual void visit (ShPtr< SubOpExpr > expr) override
 
virtual void visit (ShPtr< TernaryOpExpr > expr) override
 
virtual void visit (ShPtr< Variable > var) override
 
virtual void visit (ShPtr< BitCastExpr > expr) override
 
virtual void visit (ShPtr< ExtCastExpr > expr) override
 
virtual void visit (ShPtr< FPToIntCastExpr > expr) override
 
virtual void visit (ShPtr< IntToFPCastExpr > expr) override
 
virtual void visit (ShPtr< IntToPtrCastExpr > expr) override
 
virtual void visit (ShPtr< PtrToIntCastExpr > expr) override
 
virtual void visit (ShPtr< TruncCastExpr > expr) override
 
virtual void visit (ShPtr< ConstArray > constant) override
 
virtual void visit (ShPtr< ConstBool > constant) override
 
virtual void visit (ShPtr< ConstFloat > constant) override
 
virtual void visit (ShPtr< ConstInt > constant) override
 
virtual void visit (ShPtr< ConstNullPointer > constant) override
 
virtual void visit (ShPtr< ConstString > constant) override
 
virtual void visit (ShPtr< ConstStruct > constant) override
 
virtual void visit (ShPtr< ConstSymbol > constant) override
 
virtual void visit (ShPtr< ArrayType > type) override
 
virtual void visit (ShPtr< FloatType > type) override
 
virtual void visit (ShPtr< IntType > type) override
 
virtual void visit (ShPtr< PointerType > type) override
 
virtual void visit (ShPtr< StringType > type) override
 
virtual void visit (ShPtr< StructType > type) override
 
virtual void visit (ShPtr< FunctionType > type) override
 
virtual void visit (ShPtr< VoidType > type) override
 
virtual void visit (ShPtr< UnknownType > type) override
 
 OrderedAllVisitor (bool visitSuccessors=true, bool visitNestedStmts=true)
 Constructs a new visitor. More...
 
virtual void visitStmt (ShPtr< Statement > stmt, bool visitSuccessors=true, bool visitNestedStmts=true)
 Visits the given statement, and possibly its successors or nested statements. More...
 
void restart (bool visitSuccessors=true, bool visitNestedStmts=true)
 "Restarts" the visitor so it is in the state like it was when it was created. More...
 
bool makeAccessedAndCheckIfAccessed (ShPtr< Type > type)
 Makes the given type accessed. More...
 
- Private Member Functions inherited from retdec::llvmir2hll::Visitor
virtual ~Visitor ()=default
 
 Visitor ()=default
 

Private Attributes

VarSet allAddressedVars
 All variables in the module whose address is taken. More...
 
FuncVarSetMap funcAddressedVarsMap
 
VarFuncMap varFuncMap
 
ShPtr< Functionfunc
 Currently traversed function. More...
 
- Private Attributes inherited from retdec::llvmir2hll::OrderedAllVisitor
ShPtr< StatementlastStmt
 Statement that has been accessed as the last one. More...
 
StmtUSet accessedStmts
 A set of all accessed statements. More...
 
TypeUSet accessedTypes
 A set of all accessed types. More...
 
bool visitSuccessors
 Should statements' successor be accessed? More...
 
bool visitNestedStmts
 Should nested statements be accessed? More...
 

Additional Inherited Members

- Protected Member Functions inherited from retdec::llvmir2hll::AliasAnalysis
 AliasAnalysis ()=default
 
- Protected Attributes inherited from retdec::llvmir2hll::AliasAnalysis
ShPtr< Modulemodule
 The current module. More...
 
VarSet globalVars
 

Detailed Description

A very simple alias analysis.

The analysis utilizes the following assumptions:

Use create() to create instances. Instances of this class have reference object semantics.

Member Typedef Documentation

◆ FuncVarSetMap

Mapping of a function into a set of variables.

◆ VarFuncMap

Mapping of a variable into a function.

Constructor & Destructor Documentation

◆ SimpleAliasAnalysis()

retdec::llvmir2hll::SimpleAliasAnalysis::SimpleAliasAnalysis ( )
private

Constructs a new analysis.

Member Function Documentation

◆ create()

ShPtr< AliasAnalysis > retdec::llvmir2hll::SimpleAliasAnalysis::create ( )
static

Creates a new alias analysis.

◆ getId()

std::string retdec::llvmir2hll::SimpleAliasAnalysis::getId ( ) const
overridevirtual

Returns the ID of the analysis.

Implements retdec::llvmir2hll::AliasAnalysis.

◆ init()

void retdec::llvmir2hll::SimpleAliasAnalysis::init ( ShPtr< Module module)
overridevirtual

Initializes the analysis.

Parameters
[in]moduleThe module to be analyzed.

This member function has to be called (1) when an instance of this class (or its subclass) is created and (2) whenever the current module is changed in a way that may change the results of the alias analysis.

Preconditions
  • module is non-null

Reimplemented from retdec::llvmir2hll::AliasAnalysis.

◆ mayBePointed()

bool retdec::llvmir2hll::SimpleAliasAnalysis::mayBePointed ( ShPtr< Variable var) const
overridevirtual

Returns true if a pointer may point to var, false otherwise.

Implements retdec::llvmir2hll::AliasAnalysis.

◆ mayPointTo()

const VarSet & retdec::llvmir2hll::SimpleAliasAnalysis::mayPointTo ( ShPtr< Variable var) const
overridevirtual

Returns the set of variables to which var may point to.

If var is not a pointer, the empty set is returned. If pointsTo(var) returns a variable (non-null), then this function returns the singleton set containing the result of pointsTo(var).

If the analysis hasn't been initialized, the behavior of this member function is undefined.

Implements retdec::llvmir2hll::AliasAnalysis.

◆ pointsTo()

ShPtr< Variable > retdec::llvmir2hll::SimpleAliasAnalysis::pointsTo ( ShPtr< Variable var) const
overridevirtual

Returns the variable to which var always points.

If the variable may point to several variables or it is unknown to what the variable points to, the null pointer is returned.

If the analysis hasn't been initialized, the behavior of this member function is undefined.

Implements retdec::llvmir2hll::AliasAnalysis.

◆ visit() [1/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [2/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [3/70]

void retdec::llvmir2hll::SimpleAliasAnalysis::visit ( ShPtr< AddressOpExpr expr)
overrideprivatevirtual

◆ visit() [4/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [5/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [6/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [7/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [8/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [9/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [10/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [11/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [12/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [13/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [14/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [15/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [16/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [17/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [18/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [19/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [20/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [21/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [22/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [23/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [24/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [25/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [26/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [27/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [28/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [29/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [30/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [31/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [32/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [33/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [34/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [35/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [36/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [37/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [38/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [39/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [40/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [41/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [42/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [43/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [44/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [45/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [46/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [47/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [48/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [49/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [50/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [51/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [52/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [53/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [54/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [55/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [56/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [57/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [58/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [59/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [60/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [61/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [62/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [63/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [64/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [65/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [66/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [67/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [68/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [69/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

◆ visit() [70/70]

void retdec::llvmir2hll::OrderedAllVisitor::visit
overrideprivate

Member Data Documentation

◆ allAddressedVars

VarSet retdec::llvmir2hll::SimpleAliasAnalysis::allAddressedVars
private

All variables in the module whose address is taken.

◆ func

ShPtr<Function> retdec::llvmir2hll::SimpleAliasAnalysis::func
private

Currently traversed function.

◆ funcAddressedVarsMap

FuncVarSetMap retdec::llvmir2hll::SimpleAliasAnalysis::funcAddressedVarsMap
private

Mapping of a function into the set of variables whose address is taken in there. Function arguments are included.

◆ varFuncMap

VarFuncMap retdec::llvmir2hll::SimpleAliasAnalysis::varFuncMap
private

Mapping of a local variable into the function in which it is defined. Function arguments are included.


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