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Java Source Code / Java Documentation » Database DBMS » db4o 6.4 » EDU.purdue.cs.bloat.trans

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

EDU.purdue.cs.bloat.trans .SSAPRE

SSAPRE
public class SSAPRE (Code)
	Perform partial redundancy elimination of a CFG in SSA form using the SSA-based algorithm described in: Fred Chow, Sun Chan, Robert Kennedy, Shin-Ming Liu, Raymond Lo, and Peng Tu, "A New Algorithm for Partial Redundancy Elimination based on SSA Form", Proc. PLDI '97: 273-286, 1997. NOTE: The type for all occurrences of an inserted variable is the same as the type of the first occurrence of the expression the variable replaces. This type is guaranteed since we only group expression with equal types.

Inner Class :class Pair

Inner Class :class Int

Inner Class :class Bool

Inner Class :abstract class Def

Inner Class :class RealDef extends Def

Inner Class :class Phi extends Def

Inner Class :class FinalChecker extends TreeVisitor

Inner Class :class ExprWorklist

Inner Class :abstract class Kill

Inner Class :class ExceptionKill extends Kill

Inner Class :class MemRefKill extends Kill

Inner Class :class ExprKey

Field Summary
public static boolean	DEBUG
public static boolean	NO_ACCESS_PATHS
public static boolean	NO_PRECISE
public static boolean	NO_THREAD
protected FlowGraph	cfg
protected EditorContext	context
protected ResizeableArrayList[]	kills
protected boolean[]	killsSorted
int	next
protected int	nextValueNumber
protected HashMap	phiRelated
protected SideEffectChecker	sideEffects
protected ExprWorklist	worklist

Constructor Summary
public	SSAPRE(FlowGraph cfg, EditorContext context) Constructor.

Method Summary
boolean	isFirstOrder(Expr expr) Returns whether or not an expression is first-order.
Expr	phiRelatedFind(Expr a)
void	phiRelatedUnion(Expr a, Expr b)
public void	transform() Performs SSA-based partial redundency elimination (PRE) on a control flow graph.

Field Detail

DEBUG
public static boolean DEBUG(Code)

NO_ACCESS_PATHS
public static boolean NO_ACCESS_PATHS(Code)

NO_PRECISE
public static boolean NO_PRECISE(Code)

NO_THREAD
public static boolean NO_THREAD(Code)

cfg
protected FlowGraph cfg(Code)

context
protected EditorContext context(Code)

kills
protected ResizeableArrayList[] kills(Code)

killsSorted
protected boolean[] killsSorted(Code)

next
int next(Code)

nextValueNumber
protected int nextValueNumber(Code)

phiRelated
protected HashMap phiRelated(Code)

sideEffects
protected SideEffectChecker sideEffects(Code)

worklist
protected ExprWorklist worklist(Code)

Constructor Detail

SSAPRE
public SSAPRE(FlowGraph cfg, EditorContext context)(Code)
	Constructor. Parameters: cfg - Control flow graph on which to perform SSA-based PRE. Parameters: context - The EditorContext containing all the classes that BLOATknows about.

Method Detail

isFirstOrder
boolean isFirstOrder(Expr expr)(Code)
	Returns whether or not an expression is first-order. A first-order expression has only one operator. For example, a+b is first-order.

phiRelatedFind
Expr phiRelatedFind(Expr a)(Code)

phiRelatedUnion
void phiRelatedUnion(Expr a, Expr b)(Code)
	phiRelatedUnion associates a variable (local or stack)

transform
public void transform()(Code)
	Performs SSA-based partial redundency elimination (PRE) on a control flow graph.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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