coins.aflow
Interface UDChain

All Known Implementing Classes:

UDChainImpl

public interface UDChain

This is the reverse of the DefUseCell interface.

Nested Class Summary

static class

UDChain.UseNode

Field Summary

static IR	PARAM Indicates the (imaginary?) node that initializes the formal parameter.
static IR	UNINITIALIZED Indicates that the variable may not have been set LOCALLY, i.e., within the subprogram, before used.
static IR	UNUSED Indicates that the variable will not be used LOCALLY, i.e., within the subprogram.

Method Summary

void	addDefNode(IR pDefNode) Adds a specified node to this UDChain.
java.util.List	getDefList() Returns the list of Def nodes for this UDChain.
IR	getUseNode() Returns the Use node for this UDChian.

Field Detail

UNINITIALIZED

public static final IR UNINITIALIZED

Indicates that the variable may not have been set LOCALLY, i.e., within the subprogram, before used. This may be an entry to what is returned by getDefList(). The name "UNINITIALIZED" may be misleading, since external variables may have already been initialized outside of the scope of this analysis (SubpFlow).

Please note that this is not a full-featured "IR node", and call to most of the methods in IR interface will fail (UnsupportedOperationException thrown).

UNUSED

public static final IR UNUSED

Indicates that the variable will not be used LOCALLY, i.e., within the subprogram. This may be returned by getUseNode(). The name "UNUSED" may be misleading, since external variables may be going to be used outside of the scope of this analysis (SubpFlow).

Please note that this is not a full-featured "IR node", and call to most of the methods in IR interface will fail (UnsupportedOperationException thrown).

PARAM

public static final IR PARAM

Indicates the (imaginary?) node that initializes the formal parameter. This may be an entry for what is returned by getDefList().

Please note that this is not a full-featured "IR node", and call to most of the methods in IR interface will fail (UnsupportedOperationException thrown).

Method Detail

getUseNode

public IR getUseNode()

Returns the Use node for this UDChian.

getDefList

public java.util.List getDefList()

Returns the list of Def nodes for this UDChain. Here, a Def node is a top subtree node for the statement/instruction that sets the value for the Sym associated with this UDChain.

addDefNode

public void addDefNode(IR pDefNode)

Adds a specified node to this UDChain.