Class PhiJoinStmt

java.lang.Object

EDU.purdue.cs.bloat.tree.Node

EDU.purdue.cs.bloat.tree.Stmt

EDU.purdue.cs.bloat.tree.PhiStmt

EDU.purdue.cs.bloat.tree.PhiJoinStmt

All Implemented Interfaces:

Assign

public class PhiJoinStmt
extends PhiStmt

PhiJoinStmt represents a phi-function inserted into a control flow graph during conversion of variables to static single-assignment form. A PhiJoinStmt at a point of control flow convergence.

See Also:

• SSAConstructionInfo

Field Summary

Fields inherited from class Node

parent

Constructor Summary

Constructors

Constructor	Description
PhiJoinStmt(VarExpr target, Block block)	Constructor.

Method Summary

Modifier and Type	Method	Description
int	numOperands()	Returns the number of operands that this PhiJoinStmt has.
Expr	operandAt(Block block)	Returns the occurrence of the variable with which this PhiJoinStmt is concerned (usually represented by a VarExpr) at a given block.
Collection	operands()	Returns the operands of this PhiJoinStmt.
Collection	preds()	Returns the predacessor nodes (in the CFG not dominator graph) of the block in which this PhiJoinStmt occurs.
void	setOperandAt(Block block, Expr expr)	Set the operand to this PhiJoinStmt for a given Block to a given expression.
void	visit(TreeVisitor visitor)
void	visitForceChildren(TreeVisitor visitor)	Visit the children of this node.

Methods inherited from class PhiStmt

clone, defs, 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, visitChildren, visitOnly

Methods inherited from class Object

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

Constructor Details

PhiJoinStmt

public PhiJoinStmt(VarExpr target,
 Block block)

Constructor.

Parameters:

target - The target of this PhiStmt.

block - The basic Block in which this PhiJoinStmt resides.

Method Details

setOperandAt

public void setOperandAt(Block block,
 Expr expr)

Set the operand to this PhiJoinStmt for a given Block to a given expression.

Parameters:

block -

expr -

operandAt

public Expr operandAt(Block block)

Returns the occurrence of the variable with which this PhiJoinStmt is concerned (usually represented by a VarExpr) at a given block.

Parameters:

block - The block at which an occurrence of the variable occurs.

See Also:

• VarExpr

numOperands

public int numOperands()

Returns the number of operands that this PhiJoinStmt has.

preds

public Collection preds()

Returns the predacessor nodes (in the CFG not dominator graph) of the block in which this PhiJoinStmt occurs.

operands

public Collection operands()

Returns the operands of this PhiJoinStmt. They are usually of type VarExpr.

Specified by:

operands in class PhiStmt

See Also:

• VarExpr

visitForceChildren

public void visitForceChildren(TreeVisitor visitor)

Description copied from class: Node

Visit the children of this node. Not all Nodes will have children to visit.

Specified by:

visitForceChildren in class Node

visit

public void visit(TreeVisitor visitor)

Specified by:

visit in class Node