soot.dava.toolkits.base.AST.transformations.IfElseBreaker 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.Iterator;
import java.util.List;
import soot.dava.internal.AST.ASTCondition;
import soot.dava.internal.AST.ASTIfElseNode;
import soot.dava.internal.AST.ASTIfNode;
import soot.dava.internal.AST.ASTLabeledNode;
import soot.dava.internal.AST.ASTNode;
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.jimple.Stmt;
/*
Nomair A. Naeem 03-MARCH-2005
PATTERN 1:
if(cond1){ if(cond1){
break label_1 break label_1
} -----> }
else{ Body1
Body1
}
PATTERN 2:
if(!cond1){ if(cond1){
Body1 break label_1
} -----> }
else{ Body1
break label_1
}
The assumption is that if cond1 is true there is an abrupt edge and Body1
will not be executed. So this works only if the else in the original
has an abrupt control flow. This can be break/continue/return
TO MAKE CODE EFFECIENT BLOCK THE ANALYSIS TO GOING INTO STATEMENTS
this is done by overriding the caseASTStatementSequenceNode
*/
public class IfElseBreaker {
ASTIfNode newIfNode;
List