org.jikesrvm.compilers.opt.ir.operand

Class BranchProfileOperand

java.lang.Object

org.jikesrvm.compilers.opt.ir.operand.Operand

org.jikesrvm.compilers.opt.ir.operand.BranchProfileOperand

public final class BranchProfileOperand
extends Operand

See Also:

Operand

Field Summary

Fields

Modifier and Type	Field and Description
static float	ALWAYS
static float	LIKELY
static float	NEVER
float	takenProbability
static float	UNLIKELY

Fields inherited from class org.jikesrvm.compilers.opt.ir.operand.Operand

instruction

Constructor Summary

Constructors

Constructor and Description
BranchProfileOperand()
BranchProfileOperand(float takenProbability)

Method Summary

Modifier and Type	Method and Description
static BranchProfileOperand	always()
Operand	copy() Returns a copy of this branch operand.
BranchProfileOperand	flip() Flip the probability (p = 1 - p)
static BranchProfileOperand	likely()
static BranchProfileOperand	never()
boolean	similar(Operand op) Are two operands semantically equivalent?
String	toString() Returns the string representation of this operand.
static BranchProfileOperand	unlikely()

Methods inherited from class org.jikesrvm.compilers.opt.ir.operand.Operand

asAddressConstant, asBlock, asBranch, asClassConstant, asCondition, asDoubleConstant, asFloatConstant, asIntConstant, asLocation, asLongConstant, asMemory, asMethod, asNullConstant, asObjectConstant, asRegister, asStackLocation, asStringConstant, asTIBConstant, asType, conservativelyApproximates, getIndexInInstruction, getType, isAddress, isAddressConstant, isBlock, isBranch, isClassConstant, isConstant, isDefinitelyNull, isDouble, isDoubleConstant, isFloat, isFloatConstant, isInt, isIntConstant, isIntLike, isLocation, isLong, isLongConstant, isMemory, isMethod, isMovableObjectConstant, isNullConstant, isObjectConstant, isRef, isRegister, isStackLocation, isStringConstant, isTIBConstant, isTrueGuard, isType, meet

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

takenProbability

public float takenProbability

ALWAYS

public static final float ALWAYS

See Also:

Constant Field Values

LIKELY

public static final float LIKELY

See Also:

Constant Field Values

UNLIKELY

public static final float UNLIKELY

See Also:

Constant Field Values

NEVER

public static final float NEVER

See Also:

Constant Field Values

Constructor Detail

BranchProfileOperand

public BranchProfileOperand(float takenProbability)

BranchProfileOperand

public BranchProfileOperand()

Method Detail

always

public static BranchProfileOperand always()

likely

public static BranchProfileOperand likely()

unlikely

public static BranchProfileOperand unlikely()

never

public static BranchProfileOperand never()

copy

public Operand copy()

Returns a copy of this branch operand.

Specified by:

copy in class Operand

Returns:

a copy of this operand

flip

public BranchProfileOperand flip()

Flip the probability (p = 1 - p)

Returns:

this

similar

public boolean similar(Operand op)

Description copied from class: Operand

Are two operands semantically equivalent?

Specified by:

similar in class Operand

Parameters:

op - other operand

Returns:

true if this and op are semantically equivalent or false if they are not.

toString

public String toString()

Returns the string representation of this operand.

Overrides:

toString in class Object

Returns:

a string representation of this operand.