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

Optimizes redundant void returns. More...

#include <void_return_optimizer.h>

Inheritance diagram for retdec::llvmir2hll::VoidReturnOptimizer:
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Collaboration diagram for retdec::llvmir2hll::VoidReturnOptimizer:
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Public Member Functions

 VoidReturnOptimizer (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< ContinueStmt > stmt) override
 
virtual void visit (ShPtr< EmptyStmt > stmt) override
 
virtual void visit (ShPtr< GotoStmt > stmt) override
 
virtual void visit (ShPtr< UnreachableStmt > 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
 
- Public Member Functions inherited from retdec::llvmir2hll::Visitor
virtual ~Visitor ()=default
 

Private Member Functions

Visitor Interface
virtual void visit (ShPtr< AssignStmt > stmt) override
 
virtual void visit (ShPtr< VarDefStmt > stmt) override
 
virtual void visit (ShPtr< CallStmt > stmt) override
 
virtual void visit (ShPtr< ReturnStmt > stmt) override
 
virtual void visit (ShPtr< IfStmt > stmt) override
 
virtual void visit (ShPtr< SwitchStmt > stmt) override
 
virtual void visit (ShPtr< WhileLoopStmt > stmt) override
 
virtual void visit (ShPtr< ForLoopStmt > stmt) override
 
virtual void visit (ShPtr< UForLoopStmt > 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

int nestingLevel
 Counter of the current level of nesting. More...
 

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 redundant void returns.

This optimizer removes redundant void returns. For example,

def func():
a = 1
return

can be optimized into

def func():
a = 1

Instances of this class have reference object semantics.

This is a concrete optimizer which should not be subclassed.

Constructor & Destructor Documentation

◆ VoidReturnOptimizer()

retdec::llvmir2hll::VoidReturnOptimizer::VoidReturnOptimizer ( 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::VoidReturnOptimizer::getId ( ) const
inlineoverridevirtual

Returns the ID of the optimizer.

Implements retdec::llvmir2hll::Optimizer.

◆ visit() [1/78]

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

◆ visit() [2/78]

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

◆ visit() [3/78]

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

◆ visit() [4/78]

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

◆ visit() [5/78]

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

◆ visit() [6/78]

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

◆ visit() [7/78]

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

◆ visit() [8/78]

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

◆ visit() [9/78]

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

◆ visit() [10/78]

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

◆ visit() [11/78]

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

◆ visit() [12/78]

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

◆ visit() [13/78]

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

◆ visit() [14/78]

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

◆ visit() [15/78]

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

◆ visit() [16/78]

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

◆ visit() [17/78]

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

◆ visit() [18/78]

void retdec::llvmir2hll::VoidReturnOptimizer::visit ( ShPtr< CallStmt stmt)
overrideprivatevirtual

◆ visit() [19/78]

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

◆ visit() [20/78]

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

◆ visit() [21/78]

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

◆ visit() [22/78]

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

◆ visit() [23/78]

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

◆ visit() [24/78]

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

◆ visit() [25/78]

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

◆ visit() [26/78]

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

◆ visit() [27/78]

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

◆ visit() [28/78]

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

◆ visit() [29/78]

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

◆ visit() [30/78]

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

◆ visit() [31/78]

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

◆ visit() [32/78]

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

◆ visit() [33/78]

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

◆ visit() [34/78]

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

◆ visit() [35/78]

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

◆ visit() [36/78]

void retdec::llvmir2hll::VoidReturnOptimizer::visit ( ShPtr< ForLoopStmt stmt)
overrideprivatevirtual

◆ visit() [37/78]

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

◆ visit() [38/78]

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

◆ visit() [39/78]

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

◆ visit() [40/78]

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

◆ visit() [41/78]

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

◆ visit() [42/78]

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

◆ visit() [43/78]

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

◆ visit() [44/78]

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

◆ visit() [45/78]

void retdec::llvmir2hll::VoidReturnOptimizer::visit ( ShPtr< IfStmt stmt)
overrideprivatevirtual

◆ visit() [46/78]

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

◆ visit() [47/78]

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

◆ visit() [48/78]

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

◆ visit() [49/78]

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

◆ visit() [50/78]

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

◆ visit() [51/78]

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

◆ visit() [52/78]

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

◆ visit() [53/78]

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

◆ visit() [54/78]

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

◆ visit() [55/78]

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

◆ visit() [56/78]

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

◆ visit() [57/78]

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

◆ visit() [58/78]

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

◆ visit() [59/78]

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

◆ visit() [60/78]

void retdec::llvmir2hll::VoidReturnOptimizer::visit ( ShPtr< ReturnStmt stmt)
overrideprivatevirtual

◆ visit() [61/78]

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

◆ visit() [62/78]

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

◆ visit() [63/78]

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

◆ visit() [64/78]

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

◆ visit() [65/78]

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

◆ visit() [66/78]

void retdec::llvmir2hll::VoidReturnOptimizer::visit ( ShPtr< SwitchStmt stmt)
overrideprivatevirtual

◆ visit() [67/78]

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

◆ visit() [68/78]

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

◆ visit() [69/78]

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

◆ visit() [70/78]

void retdec::llvmir2hll::VoidReturnOptimizer::visit ( ShPtr< UForLoopStmt stmt)
overrideprivatevirtual

◆ visit() [71/78]

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

◆ visit() [72/78]

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

◆ visit() [73/78]

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

◆ visit() [74/78]

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

◆ visit() [75/78]

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

◆ visit() [76/78]

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

◆ visit() [77/78]

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

◆ visit() [78/78]

void retdec::llvmir2hll::VoidReturnOptimizer::visit ( ShPtr< WhileLoopStmt stmt)
overrideprivatevirtual

Member Data Documentation

◆ nestingLevel

int retdec::llvmir2hll::VoidReturnOptimizer::nestingLevel
private

Counter of the current level of nesting.


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