Simplifier.DefUseEffect (Jikes RVM API)

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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>
extends Enum<Simplifier.DefUseEffect>

Effect of the simplification on Def-Use chains

Enum Constant Summary
`MOVE_FOLDED` Enumeration value to indicate an operation has been replaced by a move instruction with a constant right hand side.
`MOVE_REDUCED` Enumeration value to indicate an operation has been replaced by a move instruction with a non-constant right hand side.
`REDUCED` Enumeration value to indicate an operation has been replaced by a cheaper, but non-move instruction.
`TRAP_REDUCED` Enumeration value to indicate an operation has been replaced by an unconditional trap instruction.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
`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Enumeration value to indicate an operation has been replaced by a move instruction with a constant right hand side.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Enumeration value to indicate an operation has been replaced by a move instruction with a non-constant right hand side.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Enumeration value to indicate an operation has been replaced by an unconditional trap instruction.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