retdec
unused_global_var_optimizer.h
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1 
7 #ifndef RETDEC_LLVMIR2HLL_OPTIMIZER_OPTIMIZERS_UNUSED_GLOBAL_VAR_OPTIMIZER_H
8 #define RETDEC_LLVMIR2HLL_OPTIMIZER_OPTIMIZERS_UNUSED_GLOBAL_VAR_OPTIMIZER_H
9 
13 
14 namespace retdec {
15 namespace llvmir2hll {
16 
22 class UnusedGlobalVarOptimizer final: public Optimizer {
23 public:
25 
26  virtual std::string getId() const override { return "UnusedGlobalVar"; }
27 
28 private:
29  virtual void doOptimization() override;
30 
34  virtual void visit(ShPtr<Variable> var) override;
36 
37  void computeUsedGlobalVars();
39  bool isGlobal(ShPtr<Variable> var) const;
40  bool isUsed(ShPtr<Variable> var) const;
41 
42 private:
47 
50 };
51 
52 } // namespace llvmir2hll
53 } // namespace retdec
54 
55 #endif
A base class of all optimizers.
Definition: optimizer.h:43
ShPtr< Module > module
The module that is being optimized.
Definition: optimizer.h:79
virtual void visit(ShPtr< GlobalVarDef > varDef) override
Definition: ordered_all_visitor.cpp:95
Removes global variables that are not used.
Definition: unused_global_var_optimizer.h:22
UnusedGlobalVarOptimizer(ShPtr< Module > module)
Constructs a new optimizer.
Definition: unused_global_var_optimizer.cpp:28
void computeUsedGlobalVars()
Computes used global variables.
Definition: unused_global_var_optimizer.cpp:47
VarSet usedGlobalVars
Global variables that are used.
Definition: unused_global_var_optimizer.h:49
virtual void doOptimization() override
Performs the optimization.
Definition: unused_global_var_optimizer.cpp:33
virtual void visit(ShPtr< GlobalVarDef > varDef) override
Definition: ordered_all_visitor.cpp:95
bool isGlobal(ShPtr< Variable > var) const
Is the given variable global?
Definition: unused_global_var_optimizer.cpp:77
virtual std::string getId() const override
Returns the ID of the optimizer.
Definition: unused_global_var_optimizer.h:26
void removeUnusedGlobalVars()
Removes unused global variables from the module.
Definition: unused_global_var_optimizer.cpp:66
VarSet globalVars
Definition: unused_global_var_optimizer.h:46
bool isUsed(ShPtr< Variable > var) const
Is the given global variable used?
Definition: unused_global_var_optimizer.cpp:84
A library providing API for working with back-end IR.
std::shared_ptr< T > ShPtr
An alias for a shared pointer.
Definition: smart_ptr.h:18
std::set< ShPtr< Variable > > VarSet
Set of variables.
Definition: types.h:57
Definition: archive_wrapper.h:19
A base class of all optimizers.
Declarations, aliases, macros, etc. for the use of smart pointers.
Aliases for several useful types.