decompiler
1.0.0
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Simplify MULTIEQUAL operations where the branches hold the same value. More...
Public Member Functions | |
RulePushMulti (const string &g) | |
Constructor. | |
virtual Rule * | clone (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 ghidra::Rule | |
Rule (const string &g, uint4 fl, const string &nm) | |
Construct given group, properties name. More... | |
virtual | ~Rule (void) |
Destructor. | |
const string & | getName (void) const |
Return the name of this Rule. | |
const string & | getGroup (void) const |
Return the group this Rule belongs to. | |
uint4 | getNumTests (void) |
Get number of attempted applications. | |
uint4 | getNumApply (void) |
Get number of successful applications. | |
void | setBreak (uint4 tp) |
Set a breakpoint on this Rule. | |
void | clearBreak (uint4 tp) |
Clear a breakpoint on this Rule. | |
void | clearBreakPoints (void) |
Clear all breakpoints on this Rule. | |
void | turnOnWarnings (void) |
Enable warnings for this Rule. | |
void | turnOffWarnings (void) |
Disable warnings for this Rule. | |
bool | isDisabled (void) const |
Return true if this Rule is disabled. | |
void | setDisable (void) |
Disable this Rule (within its pool) | |
void | clearDisable (void) |
Enable this Rule (within its pool) | |
bool | checkActionBreak (void) |
Check if an action breakpoint is turned on. More... | |
uint4 | getBreakPoint (void) const |
Return breakpoint toggles. | |
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... | |
Static Private Member Functions | |
static PcodeOp * | findSubstitute (Varnode *in1, Varnode *in2, BlockBasic *bb, PcodeOp *earliest) |
Find a previously existing MULTIEQUAL taking given inputs. More... | |
Additional Inherited Members | |
Public Types inherited from ghidra::Rule | |
enum | typeflags { type_disable = 1, rule_debug = 2, warnings_on = 4, warnings_given = 8 } |
Properties associated with a Rule. More... | |
Simplify MULTIEQUAL operations where the branches hold the same value.
Look for a two-branch MULTIEQUAL where both inputs are constructed in functionally equivalent ways. Remove (the reference to) one construction and move the other into the merge block.
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.
Reimplemented from ghidra::Rule.
References ghidra::PcodeOp::code(), ghidra::CPUI_COPY, ghidra::CPUI_MULTIEQUAL, ghidra::CPUI_SUBPIECE, ghidra::earliestUseInBlock(), ghidra::PcodeOp::getAddr(), ghidra::Varnode::getDef(), ghidra::PcodeOp::getIn(), ghidra::PcodeOp::getOut(), ghidra::PcodeOp::getParent(), ghidra::PcodeOp::getSlot(), ghidra::Varnode::isSpacebase(), ghidra::Varnode::isWritten(), ghidra::Varnode::loneDescend(), ghidra::Funcdata::newOp(), ghidra::Funcdata::newUniqueOut(), ghidra::Funcdata::newVarnodeOut(), ghidra::PcodeOp::numInput(), ghidra::Funcdata::opDestroy(), ghidra::Funcdata::opInsertAfter(), ghidra::Funcdata::opInsertBegin(), ghidra::Funcdata::opSetInput(), ghidra::Funcdata::opSetOpcode(), ghidra::Funcdata::opSetOutput(), ghidra::Funcdata::opUninsert(), and ghidra::Funcdata::totalReplace().
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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.
grouplist | is the list of groups being cloned |
Implements ghidra::Rule.
References ghidra::ActionGroupList::contains(), and ghidra::AddTreeState::data.
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staticprivate |
Find a previously existing MULTIEQUAL taking given inputs.
The MULTIEQUAL must be in the given block bb. If the MULTIEQUAL does not exist, check if the inputs have level 1 functional equality and if a common sub-expression is present in the block
in1 | is the first input |
in2 | is the second input |
bb | is the given block to search in |
earliest | is the earliest of the inputs |
References ghidra::Varnode::beginDescend(), ghidra::PcodeOp::code(), ghidra::CPUI_MULTIEQUAL, ghidra::cseFindInBlock(), ghidra::Varnode::endDescend(), ghidra::Varnode::getDef(), ghidra::PcodeOp::getIn(), ghidra::PcodeOp::getParent(), ghidra::Varnode::isConstant(), and ghidra::PcodeOp::numInput().
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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
oplist | is the array to populate |
Reimplemented from ghidra::Rule.
References ghidra::CPUI_MULTIEQUAL.