org.graalvm.compiler.bytecode

Class BytecodeSwitch

java.lang.Object

org.graalvm.compiler.bytecode.BytecodeSwitch

Direct Known Subclasses:

BytecodeLookupSwitch, BytecodeTableSwitch

public abstract class BytecodeSwitch
extends Object

An abstract class that provides the state and methods common to Bytecodes.LOOKUPSWITCH and Bytecodes.TABLESWITCH instructions.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	alignedBci Index of the start of the additional data for the switch instruction, aligned to a multiple of four from the method start.
protected int	bci Index of start of switch instruction.
protected BytecodeStream	stream The BytecodeStream containing the bytecode array.

Constructor Summary

Constructors

Constructor and Description
BytecodeSwitch(BytecodeStream stream, int bci) Constructor for a BytecodeStream.

Method Summary

Modifier and Type	Method and Description
int	bci() Gets the current bytecode index.
int	defaultOffset() Gets the offset from the start of the switch instruction to the default switch target.
int	defaultTarget() Gets the index of the instruction for the default switch target.
abstract int	keyAt(int i) Gets the key at i'th switch target index.
abstract int	numberOfCases() Gets the number of switch targets.
abstract int	offsetAt(int i) Gets the offset from the start of the switch instruction for the i'th switch target.
abstract int	size() Gets the total size in bytes of the switch instruction.
int	targetAt(int i) Gets the index of the instruction denoted by the i'th switch target.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

stream

protected final BytecodeStream stream

The BytecodeStream containing the bytecode array.

bci

protected final int bci

Index of start of switch instruction.

alignedBci

protected final int alignedBci

Index of the start of the additional data for the switch instruction, aligned to a multiple of four from the method start.

Constructor Detail

BytecodeSwitch

public BytecodeSwitch(BytecodeStream stream,
                      int bci)

Constructor for a BytecodeStream.

Parameters:

stream - the BytecodeStream containing the switch instruction

bci - the index in the stream of the switch instruction

Method Detail

bci

public int bci()

Gets the current bytecode index.

Returns:

the current bytecode index

targetAt

public int targetAt(int i)

Gets the index of the instruction denoted by the i'th switch target.

Parameters:

i - index of the switch target

Returns:

the index of the instruction denoted by the i'th switch target

defaultTarget

public int defaultTarget()

Gets the index of the instruction for the default switch target.

Returns:

the index of the instruction for the default switch target

defaultOffset

public int defaultOffset()

Gets the offset from the start of the switch instruction to the default switch target.

Returns:

the offset to the default switch target

keyAt

public abstract int keyAt(int i)

Gets the key at i'th switch target index.

Parameters:

i - the switch target index

Returns:

the key at i'th switch target index

offsetAt

public abstract int offsetAt(int i)

Gets the offset from the start of the switch instruction for the i'th switch target.

Parameters:

i - the switch target index

Returns:

the offset to the i'th switch target

numberOfCases

public abstract int numberOfCases()

Gets the number of switch targets.

Returns:

the number of switch targets

size

public abstract int size()

Gets the total size in bytes of the switch instruction.

Returns:

the total size in bytes of the switch instruction