jdk.internal.jvmci.code

Class RegisterSaveLayout

java.lang.Object

jdk.internal.jvmci.code.RegisterSaveLayout

public final class RegisterSaveLayout
extends Object

A map from registers to frame slots. This can be used to describe where callee saved registers are saved in a callee's frame.

Field Summary

Fields

Modifier and Type	Field and Description
private Register[]	registers Keys.
private int[]	slots Slot indexes relative to stack pointer.

Constructor Summary

Constructors

Constructor and Description
RegisterSaveLayout(Register[] registers, int[] slots) Creates a map from registers to frame slots.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
int	hashCode()
Map<Register,Integer>	registersToSlots(boolean sorted) Gets this layout information as a Map from registers to slots.
int	registerToSlot(Register register) Gets the frame slot index for a given register.
Map<Integer,Register>	slotsToRegisters(boolean sorted) Gets this layout information as a Map from slots to registers.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

registers

private final Register[] registers

Keys.

slots

private final int[] slots

Slot indexes relative to stack pointer.

Constructor Detail

RegisterSaveLayout

public RegisterSaveLayout(Register[] registers,
                          int[] slots)

Creates a map from registers to frame slots.

Parameters:

registers - the keys in the map

slots - frame slot index for each register in registers

Method Detail

registerToSlot

public int registerToSlot(Register register)

Gets the frame slot index for a given register.

Parameters:

register - register to get the frame slot index for

Returns:

frame slot index

registersToSlots

public Map<Register,Integer> registersToSlots(boolean sorted)

Gets this layout information as a Map from registers to slots.

slotsToRegisters

public Map<Integer,Register> slotsToRegisters(boolean sorted)

Gets this layout information as a Map from slots to registers.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object