Class PhiStmt

java.lang.Object

EDU.purdue.cs.bloat.tree.Node

EDU.purdue.cs.bloat.tree.Stmt

EDU.purdue.cs.bloat.tree.PhiStmt

All Implemented Interfaces:

Assign

Direct Known Subclasses:

PhiCatchStmt, PhiJoinStmt

public abstract class PhiStmt
extends Stmt
implements Assign

A PhiStmt is inserted into a CFG in Single Static Assignment for. It is used to "merge" uses of the same variable in different basic blocks.

See Also:

• PhiJoinStmt
• PhiCatchStmt

Field Summary

Fields inherited from class Node

parent

Constructor Summary

Constructors

Constructor	Description
PhiStmt(VarExpr target)	Constructor.

Method Summary

Modifier and Type	Method	Description
Object	clone()
DefExpr[]	defs()	Return the expressions (variables) defined by this PhiStmt.
abstract Collection	operands()
VarExpr	target()

Methods inherited from class Stmt

cleanupOnly

Methods inherited from class Node

block, cleanup, copyInto, hasParent, key, parent, replaceWith, replaceWith, setKey, setParent, setValueNumber, toString, valueNumber, visit, visitChildren, visitForceChildren, visitOnly

Methods inherited from class Object

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

Constructor Details

PhiStmt

public PhiStmt(VarExpr target)

Constructor.

Parameters:

target - A stack expression or local variable that is the target of this phi-statement.

Method Details

target

public VarExpr target()

defs

public DefExpr[] defs()

Return the expressions (variables) defined by this PhiStmt. In this case, only the target is defined.

Specified by:

defs in interface Assign

operands

public abstract Collection operands()

clone

public Object clone()

Specified by:

clone in class Stmt