soot.dava.toolkits.base.AST.transformations.OrAggregatorTwo Maven / Gradle / Ivy
package soot.dava.toolkits.base.AST.transformations;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2005 Nomair A. Naeem
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import java.util.ArrayList;
import java.util.List;
import soot.G;
import soot.dava.internal.AST.ASTCondition;
import soot.dava.internal.AST.ASTIfElseNode;
import soot.dava.internal.AST.ASTIfNode;
import soot.dava.internal.AST.ASTNode;
import soot.dava.internal.AST.ASTOrCondition;
import soot.dava.internal.AST.ASTStatementSequenceNode;
import soot.dava.internal.SET.SETNodeLabel;
import soot.dava.internal.asg.AugmentedStmt;
import soot.dava.internal.javaRep.DAbruptStmt;
import soot.dava.toolkits.base.AST.analysis.DepthFirstAdapter;
import soot.jimple.Stmt;
/*
Nomair A. Naeem 21-FEB-2005
The class is responsible to one of the following two transformation on the AST
PRIORITY 1:
if(cond1){ if(cond1 || cond2) if(cond1 || cond2){
A A A
} } }
else{ ---> else{ --->
if(cond2){ empty else body
A }
}
}
The removal of the empty else body is done by a different Transformation since
we need a reference to the parent node of this if
PRIORITY 2:
If the above pattern fails to match the following pattern is checked:
if(cond1){ if(!cond1){
break label_1; Body1
} ----> }
else{ else{
Body1 break label_1
} }
The idea behind this is that this type of flipping of conditions
will help in moving a condition into a cycle node
TO MAKE CODE EFFECIENT BLOCK THE ANALYSIS TO GOING INTO STATEMENTS
this is done by overriding the caseASTStatementSequenceNode
*/
public class OrAggregatorTwo extends DepthFirstAdapter {
public OrAggregatorTwo() {
DEBUG = false;
}
public OrAggregatorTwo(boolean verbose) {
super(verbose);
DEBUG = false;
}
public void caseASTStatementSequenceNode(ASTStatementSequenceNode node) {
}
public void outASTIfElseNode(ASTIfElseNode node) {
// check whether the else body has another if and nothing else
List