retdec
Public Member Functions | Private Member Functions | Private Attributes | List of all members
retdec::llvmir2hll::AggressiveDerefOptimizer Class Referencefinal

Optimizes dereferences of integer values. More...

#include <aggressive_deref_optimizer.h>

Inheritance diagram for retdec::llvmir2hll::AggressiveDerefOptimizer:
Inheritance graph
[legend]
Collaboration diagram for retdec::llvmir2hll::AggressiveDerefOptimizer:
Collaboration graph
[legend]

Public Member Functions

 AggressiveDerefOptimizer (ShPtr< Module > module)
 Constructs a new optimizer. More...
 
virtual std::string getId () const override
 Returns the ID of the optimizer. More...
 
- Public Member Functions inherited from retdec::llvmir2hll::Optimizer
 Optimizer (ShPtr< Module > module)
 Constructs a new optimizer. More...
 
ShPtr< Moduleoptimize ()
 Performs all the optimizations of the specific optimizer. More...
 
- Public 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< 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< 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< 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
 
- Public Member Functions inherited from retdec::llvmir2hll::Visitor
virtual ~Visitor ()=default
 

Private Member Functions

void tryToOptimizeStmt (ShPtr< Statement > stmt, ShPtr< Expression > lhs, ShPtr< Expression > rhs)
 Tries to optimize the given statement stmt, composed of lhs and rhs. More...
 
Visitor Interface
virtual void visit (ShPtr< DerefOpExpr > expr) override
 
virtual void visit (ShPtr< AssignStmt > stmt) override
 
virtual void visit (ShPtr< VarDefStmt > stmt) 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 Attributes

bool intDerefFound
 

Additional Inherited Members

- Static Public Member Functions inherited from retdec::llvmir2hll::Optimizer
template<class OptimizerType , typename... Args>
static ShPtr< Moduleoptimize (ShPtr< Module > module, Args &&... args)
 Creates an instance of OptimizerType with the given arguments and optimizes the given module by it. More...
 
- Protected Member Functions inherited from retdec::llvmir2hll::FuncOptimizer
 FuncOptimizer (ShPtr< Module > module)
 Constructs a new function optimizer. More...
 
virtual void doOptimization () override
 Performs the optimization on all functions in the module. More...
 
virtual void runOnFunction (ShPtr< Function > func)
 Performs all optimizations on the given function. More...
 
template<typename T >
void visitNestedAndSuccessorStatements (ShPtr< T > stmt)
 Visits the given statement, its nested statements, and successor statements (depending on the settings of the visitor). More...
 
- Protected Member Functions inherited from retdec::llvmir2hll::Optimizer
virtual void doInitialization ()
 Performs pre-optimization matters. More...
 
virtual void doFinalization ()
 Performs post-optimization matters. More...
 
- Protected Member Functions inherited from retdec::llvmir2hll::OrderedAllVisitor
 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...
 
- Protected Member Functions inherited from retdec::llvmir2hll::Visitor
 Visitor ()=default
 
- Protected Attributes inherited from retdec::llvmir2hll::FuncOptimizer
ShPtr< FunctioncurrFunc
 Function that is currently being optimized. More...
 
- Protected Attributes inherited from retdec::llvmir2hll::Optimizer
ShPtr< Modulemodule
 The module that is being optimized. More...
 
- Protected 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...
 

Detailed Description

Optimizes dereferences of integer values.

Currently, this optimizer removes assign or variable-defining statements that access memory locations through an integer. For example, all the following statements are removed:

*(56778) = 5;
a = *(int32_t *)56780;
a = *(i + 5); // i here is of an integral type

Instances of this class have reference object semantics.

This is a concrete optimizer which should not be subclassed.

Constructor & Destructor Documentation

◆ AggressiveDerefOptimizer()

retdec::llvmir2hll::AggressiveDerefOptimizer::AggressiveDerefOptimizer ( ShPtr< Module module)

Constructs a new optimizer.

Parameters
[in]moduleModule to be optimized.
Preconditions
  • module is non-null

Member Function Documentation

◆ getId()

virtual std::string retdec::llvmir2hll::AggressiveDerefOptimizer::getId ( ) const
inlineoverridevirtual

Returns the ID of the optimizer.

Implements retdec::llvmir2hll::Optimizer.

◆ tryToOptimizeStmt()

void retdec::llvmir2hll::AggressiveDerefOptimizer::tryToOptimizeStmt ( ShPtr< Statement stmt,
ShPtr< Expression lhs,
ShPtr< Expression rhs 
)
private

Tries to optimize the given statement stmt, composed of lhs and rhs.

◆ visit() [1/72]

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

◆ visit() [2/72]

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

◆ visit() [3/72]

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

◆ visit() [4/72]

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

◆ visit() [5/72]

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

◆ visit() [6/72]

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

◆ visit() [7/72]

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

◆ visit() [8/72]

void retdec::llvmir2hll::AggressiveDerefOptimizer::visit ( ShPtr< AssignStmt stmt)
overrideprivatevirtual

◆ visit() [9/72]

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

◆ visit() [10/72]

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

◆ visit() [11/72]

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

◆ visit() [12/72]

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

◆ visit() [13/72]

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

◆ visit() [14/72]

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

◆ visit() [15/72]

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

◆ visit() [16/72]

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

◆ visit() [17/72]

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

◆ visit() [18/72]

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

◆ visit() [19/72]

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

◆ visit() [20/72]

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

◆ visit() [21/72]

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

◆ visit() [22/72]

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

◆ visit() [23/72]

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

◆ visit() [24/72]

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

◆ visit() [25/72]

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

◆ visit() [26/72]

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

◆ visit() [27/72]

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

◆ visit() [28/72]

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

◆ visit() [29/72]

void retdec::llvmir2hll::AggressiveDerefOptimizer::visit ( ShPtr< DerefOpExpr expr)
overrideprivatevirtual

◆ visit() [30/72]

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

◆ visit() [31/72]

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

◆ visit() [32/72]

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

◆ visit() [33/72]

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

◆ visit() [34/72]

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

◆ visit() [35/72]

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

◆ visit() [36/72]

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

◆ visit() [37/72]

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

◆ visit() [38/72]

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

◆ visit() [39/72]

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

◆ visit() [40/72]

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

◆ visit() [41/72]

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

◆ visit() [42/72]

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

◆ visit() [43/72]

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

◆ visit() [44/72]

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

◆ visit() [45/72]

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

◆ visit() [46/72]

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

◆ visit() [47/72]

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

◆ visit() [48/72]

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

◆ visit() [49/72]

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

◆ visit() [50/72]

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

◆ visit() [51/72]

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

◆ visit() [52/72]

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

◆ visit() [53/72]

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

◆ visit() [54/72]

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

◆ visit() [55/72]

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

◆ visit() [56/72]

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

◆ visit() [57/72]

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

◆ visit() [58/72]

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

◆ visit() [59/72]

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

◆ visit() [60/72]

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

◆ visit() [61/72]

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

◆ visit() [62/72]

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

◆ visit() [63/72]

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

◆ visit() [64/72]

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

◆ visit() [65/72]

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

◆ visit() [66/72]

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

◆ visit() [67/72]

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

◆ visit() [68/72]

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

◆ visit() [69/72]

void retdec::llvmir2hll::AggressiveDerefOptimizer::visit ( ShPtr< VarDefStmt stmt)
overrideprivatevirtual

◆ visit() [70/72]

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

◆ visit() [71/72]

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

◆ visit() [72/72]

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

Member Data Documentation

◆ intDerefFound

bool retdec::llvmir2hll::AggressiveDerefOptimizer::intDerefFound
private

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