org.jikesrvm.compilers.opt

Enum Simplifier.DefUseEffect

java.lang.Object

java.lang.Enum<Simplifier.DefUseEffect>

org.jikesrvm.compilers.opt.Simplifier.DefUseEffect

All Implemented Interfaces:

Serializable, Comparable<Simplifier.DefUseEffect>

Enclosing class:

Simplifier

public static enum Simplifier.DefUseEffect
extends Enum<Simplifier.DefUseEffect>

Effect of the simplification on Def-Use chains

Enum Constant Summary

Enum Constants

Enum Constant and Description
MOVE_FOLDED Enumeration value to indicate an operation has been replaced by a move instruction with a constant right hand side.
MOVE_REDUCED Enumeration value to indicate an operation has been replaced by a move instruction with a non-constant right hand side.
REDUCED Enumeration value to indicate an operation has been replaced by a cheaper, but non-move instruction.
TRAP_REDUCED Enumeration value to indicate an operation has been replaced by an unconditional trap instruction.
UNCHANGED Enumeration value to indicate an operation is unchanged, although the order of operands may have been canonicalized and type information strengthened.

Method Summary

Modifier and Type	Method and Description
static Simplifier.DefUseEffect	valueOf(String name) Returns the enum constant of this type with the specified name.
static Simplifier.DefUseEffect[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

UNCHANGED

public static final Simplifier.DefUseEffect UNCHANGED

Enumeration value to indicate an operation is unchanged, although the order of operands may have been canonicalized and type information strengthened.

MOVE_FOLDED

public static final Simplifier.DefUseEffect MOVE_FOLDED

Enumeration value to indicate an operation has been replaced by a move instruction with a constant right hand side.

MOVE_REDUCED

public static final Simplifier.DefUseEffect MOVE_REDUCED

Enumeration value to indicate an operation has been replaced by a move instruction with a non-constant right hand side.

TRAP_REDUCED

public static final Simplifier.DefUseEffect TRAP_REDUCED

Enumeration value to indicate an operation has been replaced by an unconditional trap instruction.

REDUCED

public static final Simplifier.DefUseEffect REDUCED

Enumeration value to indicate an operation has been replaced by a cheaper, but non-move instruction.

Method Detail

values

public static Simplifier.DefUseEffect[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (Simplifier.DefUseEffect c : Simplifier.DefUseEffect.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static Simplifier.DefUseEffect valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null