Ghidra Decompiler Analysis Engine
Public Member Functions | List of all members
RuleZextEliminate Class Reference

Eliminate INT_ZEXT in comparisons: zext(V) == c => V == c More...

Inheritance diagram for RuleZextEliminate:
Inheritance graph
[legend]
Collaboration diagram for RuleZextEliminate:
Collaboration graph
[legend]

Public Member Functions

virtual Ruleclone (const ActionGroupList &grouplist) const
 Clone the Rule. More...
 
virtual void getOpList (vector< uint4 > &oplist) const
 List of op codes this rule operates on. More...
 
virtual int4 applyOp (PcodeOp *op, Funcdata &data)
 Attempt to apply this Rule. More...
 
- Public Member Functions inherited from Rule
 Rule (const string &g, uint4 fl, const string &nm)
 Construct given group, properties name. More...
 
bool checkActionBreak (void)
 Check if an action breakpoint is turned on. More...
 
virtual void reset (Funcdata &data)
 Reset this Rule. More...
 
virtual void resetStats (void)
 Reset Rule statistics. More...
 
virtual void printStatistics (ostream &s) const
 Print statistics for this Rule. More...
 

Additional Inherited Members

- Public Types inherited from Rule
enum  typeflags { type_disable = 1, rule_debug = 2, warnings_on = 4, warnings_given = 8 }
 Properties associated with a Rule. More...
 

Detailed Description

Eliminate INT_ZEXT in comparisons: zext(V) == c => V == c

The constant Varnode changes size and must not lose any non-zero bits. Handle other variants with INT_NOTEQUAL, INT_LESS, and INT_LESSEQUAL

Member Function Documentation

◆ applyOp()

int4 RuleZextEliminate::applyOp ( PcodeOp op,
Funcdata data 
)
virtual

Attempt to apply this Rule.

This method contains the main logic for applying the Rule. It must use a given PcodeOp as the point at which the Rule applies. If it does apply, changes are made directly to the function and 1 (non-zero) is returned, otherwise 0 is returned.

Parameters
opis the given PcodeOp where the Rule may apply
datais the function to which to apply

Reimplemented from Rule.

◆ clone()

virtual Rule* RuleZextEliminate::clone ( const ActionGroupList grouplist) const
inlinevirtual

Clone the Rule.

If this Rule is a member of one of the groups in the grouplist, this returns a clone of the Rule, otherwise NULL is returned.

Parameters
grouplistis the list of groups being cloned
Returns
the cloned Rule or NULL

Implements Rule.

◆ getOpList()

void RuleZextEliminate::getOpList ( vector< uint4 > &  oplist) const
virtual

List of op codes this rule operates on.

Populate the given array with all possible OpCodes this Rule might apply to. By default, this method returns all possible OpCodes

Parameters
oplistis the array to populate

Reimplemented from Rule.


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