This class implements a mechanism to disable passes and individual optimizations at compile time based on a command line option (-opt-bisect) in order to perform a bisecting search for optimization-related problems. More...

#include "llvm/IR/OptBisect.h"

Inheritance diagram for llvm::OptBisect:

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Public Member Functions
	OptBisect ()=default
	Default constructor.
	~OptBisect () override=default
bool	shouldRunPass (StringRef PassName, StringRef IRDescription) const override
	Checks the bisect intervals to determine if the specified pass should run.
bool	isEnabled () const override
	isEnabled() should return true before calling shouldRunPass().
void	setIntervals (IntegerInclusiveIntervalUtils::IntervalList Intervals)
	Set intervals directly from an IntervalList.
void	clearIntervals ()
	Clear all intervals, effectively disabling bisection.
Public Member Functions inherited from llvm::OptPassGate
virtual	~OptPassGate ()=default

Detailed Description

This class implements a mechanism to disable passes and individual optimizations at compile time based on a command line option (-opt-bisect) in order to perform a bisecting search for optimization-related problems.

Definition at line 45 of file OptBisect.h.

Constructor & Destructor Documentation

◆ OptBisect()

llvm::OptBisect::OptBisect ( )

default

Default constructor.

Initializes the state to "disabled". The bisection will be enabled by the cl::opt call-back when the command line option is processed. Clients should not instantiate this class directly. All access should go through LLVMContext.

◆ ~OptBisect()

llvm::OptBisect::~OptBisect ( )

overridedefault

References PassName, and shouldRunPass().

Member Function Documentation

◆ clearIntervals()

void llvm::OptBisect::clearIntervals ( )

inline

Clear all intervals, effectively disabling bisection.

Definition at line 78 of file OptBisect.h.

◆ isEnabled()

bool llvm::OptBisect::isEnabled ( ) const

inlineoverridevirtual

isEnabled() should return true before calling shouldRunPass().

Reimplemented from llvm::OptPassGate.

Definition at line 70 of file OptBisect.h.

Referenced by shouldRunPass().

◆ setIntervals()

void llvm::OptBisect::setIntervals ( IntegerInclusiveIntervalUtils::IntervalList Intervals )

inline

Set intervals directly from an IntervalList.

Definition at line 73 of file OptBisect.h.

◆ shouldRunPass()

bool OptBisect::shouldRunPass	(	StringRef	PassName,
		StringRef	IRDescription ) const

overridevirtual

Checks the bisect intervals to determine if the specified pass should run.

The method prints the name of the pass, its assigned bisect number, and whether or not the pass will be executed. It returns true if the pass should run, i.e. if no intervals are specified or the current pass number falls within one of the specified intervals.

Most passes should not call this routine directly. Instead, it is called through helper routines provided by the base classes of the pass. For instance, function passes should call FunctionPass::skipFunction().

Reimplemented from llvm::OptPassGate.

Definition at line 105 of file OptBisect.cpp.

References assert(), llvm::IntegerInclusiveIntervalUtils::contains(), isEnabled(), OptBisectVerbose, PassName, and printPassMessage().

Referenced by ~OptBisect().

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

include/llvm/IR/OptBisect.h
lib/IR/OptBisect.cpp

Public Member Functions