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Java Source Code / Java Documentation » Database DBMS » db4o 6.4 » EDU.purdue.cs.bloat.tree   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    EDU.purdue.cs.bloat.tree.StackOptimizer StackOptimizer public class StackOptimizer (Code) StackOptimizer analyzes the relative distances of various uses of the same definition of a local variable to add dups and swaps to the bytecode and eliminate loads and stores. author:    Thomas VanDrunen Field Summary static  boolean DEBUG       Hashtable defInfoMap       Block owningBlock       Hashtable useInfoMap      Constructor Summary public   StackOptimizer(Block owningBlock)      Method Summary public  int dup_x1s(LocalExpr expr)      public  int dup_x2s(LocalExpr expr)      public  int dups(LocalExpr expr)      public  void infoDisplay(LocalExpr expr)      public  boolean onStack(LocalExpr expr)      public  void optimize()      Optimize runs the algorithm for analyzing the tree, looking for opportunities to replaces stores and loads with dups and swaps. public static  void optimizeCFG(FlowGraph cfg)      public  boolean shouldStore(LocalExpr expr)      public  boolean shouldSwap(LocalExpr expr)      Field Detail DEBUG static boolean DEBUG(Code) defInfoMap Hashtable defInfoMap(Code) owningBlock Block owningBlock(Code) useInfoMap Hashtable useInfoMap(Code) Constructor Detail StackOptimizer public StackOptimizer(Block owningBlock)(Code) Method Detail dup_x1s public int dup_x1s(LocalExpr expr)(Code) dup_x2s public int dup_x2s(LocalExpr expr)(Code) dups public int dups(LocalExpr expr)(Code) infoDisplay public void infoDisplay(LocalExpr expr)(Code) onStack public boolean onStack(LocalExpr expr)(Code) optimize public void optimize()(Code) Optimize runs the algorithm for analyzing the tree, looking for opportunities to replaces stores and loads with dups and swaps. It initiates several visitors, and information is sotred in defInfoMap and useInfoMap optimizeCFG public static void optimizeCFG(FlowGraph cfg)(Code) shouldStore public boolean shouldStore(LocalExpr expr)(Code) Various methods used by CodeGenerator, used as an interface into the information in defInfoMap and useInfoMap shouldSwap public boolean shouldSwap(LocalExpr expr)(Code) 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)