jdk.internal.jvmci.code

Class StackSlot

java.lang.Object

jdk.internal.jvmci.meta.AbstractValue

jdk.internal.jvmci.meta.AllocatableValue

jdk.internal.jvmci.code.StackSlotValue

jdk.internal.jvmci.code.StackSlot

All Implemented Interfaces:

JavaValue, KindProvider, TrustedInterface, Value

public final class StackSlot
extends StackSlotValue

Represents a compiler spill slot or an outgoing stack-based argument in a method's frame or an incoming stack-based argument in a method's caller's frame.

Nested Class Summary

Nested classes/interfaces inherited from interface jdk.internal.jvmci.meta.Value

Value.IllegalValue

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	addFrameSize
private int	offset

Fields inherited from class jdk.internal.jvmci.meta.AllocatableValue

NONE

Fields inherited from class jdk.internal.jvmci.meta.AbstractValue

ILLEGAL

Fields inherited from interface jdk.internal.jvmci.meta.Value

NO_VALUES

Constructor Summary

Constructors

Modifier	Constructor and Description
private	StackSlot(LIRKind kind, int offset, boolean addFrameSize) Private constructor to enforce use of get(LIRKind, int, boolean) so that a cache can be used.

Method Summary

Modifier and Type	Method and Description
StackSlot	asInArg() Gets this stack slot used to pass an argument from the perspective of a callee.
StackSlot	asOutArg() Gets this stack slot used to pass an argument from the perspective of a caller.
boolean	equals(Object obj)
static StackSlot	get(LIRKind kind, int offset, boolean addFrameSize) Gets a StackSlot instance representing a stack slot at a given index holding a value of a given kind.
int	getOffset(int totalFrameSize) Gets the offset of this stack slot, relative to the stack pointer.
boolean	getRawAddFrameSize()
int	getRawOffset()
int	hashCode()
boolean	isInCallerFrame()
String	toString()

Methods inherited from class jdk.internal.jvmci.meta.AbstractValue

getKind, getKindSuffix, getLIRKind, getPlatformKind, identityEquals

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface jdk.internal.jvmci.meta.JavaValue

getKind

Methods inherited from interface jdk.internal.jvmci.meta.KindProvider

getKind

Methods inherited from interface jdk.internal.jvmci.meta.Value

identityEquals

Field Detail

offset

private final int offset

addFrameSize

private final boolean addFrameSize

Constructor Detail

StackSlot

private StackSlot(LIRKind kind,
                  int offset,
                  boolean addFrameSize)

Private constructor to enforce use of get(LIRKind, int, boolean) so that a cache can be used.

Method Detail

get

public static StackSlot get(LIRKind kind,
                            int offset,
                            boolean addFrameSize)

Gets a StackSlot instance representing a stack slot at a given index holding a value of a given kind.

Parameters:

kind - The kind of the value stored in the stack slot.

offset - The offset of the stack slot (in bytes)

addFrameSize - Specifies if the offset is relative to the stack pointer, or the beginning of the frame (stack pointer + total frame size).

getOffset

public int getOffset(int totalFrameSize)

Gets the offset of this stack slot, relative to the stack pointer.

Returns:

The offset of this slot (in bytes).

isInCallerFrame

public boolean isInCallerFrame()

getRawOffset

public int getRawOffset()

getRawAddFrameSize

public boolean getRawAddFrameSize()

toString

public String toString()

Overrides:

toString in class Object

asOutArg

public StackSlot asOutArg()

Gets this stack slot used to pass an argument from the perspective of a caller.

asInArg

public StackSlot asInArg()

Gets this stack slot used to pass an argument from the perspective of a callee.

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractValue

equals

public boolean equals(Object obj)

Overrides:

equals in class AbstractValue