org.apache.flex.abc.semantics

Class Block

java.lang.Object

org.apache.flex.abc.semantics.Block

All Implemented Interfaces:

IBasicBlock

public class Block
extends Object
implements IBasicBlock

Block implements IBasicBlock and is the normal representation of a vertex in a method's flowgraph.

Constructor Summary

Constructors

Constructor and Description
Block()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canFallThrough() Determines if control can fall through the end of the Block.
Instruction	get(int idx) Fetch the Instruction at the specified position.
List<Instruction>	getInstructions() Get the contents of the block.
Collection<IBasicBlock>	getSuccessors() Get this block's successors; this defines the set of edges in the flowgraph.
int	size() How big is this block?

Methods inherited from class java.lang.Object

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

Constructor Detail

Block

public Block()

Method Detail

getSuccessors

public Collection<IBasicBlock> getSuccessors()

Description copied from interface: IBasicBlock

Get this block's successors; this defines the set of edges in the flowgraph.

Specified by:

getSuccessors in interface IBasicBlock

Returns:

successors of this block.

size

public int size()

Description copied from interface: IBasicBlock

How big is this block?

Specified by:

size in interface IBasicBlock

Returns:

this Block's instructions' size.

get

public Instruction get(int idx)

Description copied from interface: IBasicBlock

Fetch the Instruction at the specified position.

Specified by:

get in interface IBasicBlock

Parameters:

idx - - the Instruction's position.

Returns:

the Instruction at the specified index.

getInstructions

public List<Instruction> getInstructions()

Description copied from interface: IBasicBlock

Get the contents of the block.

Specified by:

getInstructions in interface IBasicBlock

Returns:

this Block's instructions as a mutable list.

canFallThrough

public boolean canFallThrough()

Determines if control can fall through the end of the Block. This will look back through the Block's instructions, skipping any non-exectuable instructions such as debug instructions. Returns, throws, and unconditional branches will not fall through, but conditional branches and all other instructions will fall through.

Specified by:

canFallThrough in interface IBasicBlock

Returns:

true if control can fall through this Block.