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

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

EDU.purdue.cs.bloat.ssa .SSA

SSA

public class SSA (Code)

Compute the SSA form of the control flow graph and build FUD chains.

The SSA algorithm is from:

 R. Cytron, J. Ferrante J, B. K. Rosen, M. N. Wegman, and F. K. Zadeck,
 "Efficiently Computing Static Single Assignment Form and the Control
 Dependence Graph", TOPLAS, 13(4): 451-490, October 1991.

I made modifications to the algorithm to compute FUD chains and to run the algorithm separately for each variable similar to the SSAPRE algorithm. Making a separate pass for each variable allows variables to be added incrementally.

Field Summary
public static boolean	DEBUG

Method Summary
public static void	transform(FlowGraph cfg) Transforms a control flow graph into Single Static Assignment (SSA) form. First, the CFG is traversed and a list of all variables (both local and stack) eligible for SSA renaming is compiled.
public static void	transform(FlowGraph cfg, SSAConstructionInfo info) Performs the actions necessary to convert a CFG into SSA form with respect to one variable.

Field Detail

DEBUG
public static boolean DEBUG(Code)

Method Detail

transform
public static void transform(FlowGraph cfg)(Code)
	Transforms a control flow graph into Single Static Assignment (SSA) form. First, the CFG is traversed and a list of all variables (both local and stack) eligible for SSA renaming is compiled. Variables are represented by instances of `SSAConstructionInfo`. Each of these variables is then transformed. See Also: SSA.transform(FlowGraph) See Also: SSAConstructionInfo

transform
public static void transform(FlowGraph cfg, SSAConstructionInfo info)(Code)
	Performs the actions necessary to convert a CFG into SSA form with respect to one variable. The variable's information is stored in the `SSAConstructionInfo`.

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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