com.oracle.graal.lir.alloc.lsra

Enum Interval.RegisterPriority

java.lang.Object

java.lang.Enum<Interval.RegisterPriority>

com.oracle.graal.lir.alloc.lsra.Interval.RegisterPriority

All Implemented Interfaces:

Serializable, Comparable<Interval.RegisterPriority>

Enclosing class:

Interval

public static enum Interval.RegisterPriority
extends Enum<Interval.RegisterPriority>

Constants denoting the register usage priority for an interval. The constants are declared in increasing order of priority are are used to optimize spilling when multiple overlapping intervals compete for limited registers.

Enum Constant Summary

Enum Constants

Enum Constant and Description
LiveAtLoopEnd Priority level for intervals live at the end of a loop.
MustHaveRegister Priority level for intervals that must be allocated to a register.
None No special reason for an interval to be allocated a register.
ShouldHaveRegister Priority level for intervals that should be allocated to a register.

Field Summary

Fields

Modifier and Type	Field and Description
static Interval.RegisterPriority[]	VALUES

Method Summary

Modifier and Type	Method and Description
boolean	greaterEqual(Interval.RegisterPriority other) Determines if this priority is higher than or equal to a given priority.
boolean	lessThan(Interval.RegisterPriority other) Determines if this priority is lower than a given priority.
static Interval.RegisterPriority	valueOf(String name) Returns the enum constant of this type with the specified name.
static Interval.RegisterPriority[]	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

None

public static final Interval.RegisterPriority None

No special reason for an interval to be allocated a register.

LiveAtLoopEnd

public static final Interval.RegisterPriority LiveAtLoopEnd

Priority level for intervals live at the end of a loop.

ShouldHaveRegister

public static final Interval.RegisterPriority ShouldHaveRegister

Priority level for intervals that should be allocated to a register.

MustHaveRegister

public static final Interval.RegisterPriority MustHaveRegister

Priority level for intervals that must be allocated to a register.

Field Detail

VALUES

public static final Interval.RegisterPriority[] VALUES

Method Detail

values

public static Interval.RegisterPriority[] 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 (Interval.RegisterPriority c : Interval.RegisterPriority.values())
    System.out.println(c);

Returns:

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

valueOf

public static Interval.RegisterPriority 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

greaterEqual

public boolean greaterEqual(Interval.RegisterPriority other)

Determines if this priority is higher than or equal to a given priority.

lessThan

public boolean lessThan(Interval.RegisterPriority other)

Determines if this priority is lower than a given priority.