soot.dexpler.instructions.MoveResultInstruction Maven / Gradle / Ivy

package soot.dexpler.instructions;

/*-
 * #%L
 * Soot - a J*va Optimization Framework
 * %%
 * Copyright (C) 2012 Michael Markert, Frank Hartmann
 * 
 * (c) 2012 University of Luxembourg - Interdisciplinary Centre for
 * Security Reliability and Trust (SnT) - All rights reserved
 * Alexandre Bartel
 * 
 * %%
 * 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 org.jf.dexlib2.iface.instruction.Instruction;
import org.jf.dexlib2.iface.instruction.OneRegisterInstruction;

import soot.dexpler.DexBody;
import soot.dexpler.IDalvikTyper;
import soot.dexpler.typing.DalvikTyper;
import soot.jimple.AssignStmt;
import soot.jimple.Jimple;
import soot.jimple.internal.JAssignStmt;

public class MoveResultInstruction extends DexlibAbstractInstruction {
  // private Local local;
  // private Expr expr;

  public MoveResultInstruction(Instruction instruction, int codeAdress) {
    super(instruction, codeAdress);
  }

  @Override
  public void jimplify(DexBody body) {
    // if (local != null && expr != null)
    // throw new RuntimeException("Both local and expr are set to move.");

    int dest = ((OneRegisterInstruction) instruction).getRegisterA();

    // if (local != null)
    // assign = Jimple.v().newAssignStmt(body.getRegisterLocal(dest), local);
    // else if (expr != null)
    // assign = Jimple.v().newAssignStmt(body.getRegisterLocal(dest), expr);
    // else
    // throw new RuntimeException("Neither local and expr are set to move.");
    AssignStmt assign = Jimple.v().newAssignStmt(body.getRegisterLocal(dest), body.getStoreResultLocal());
    setUnit(assign);
    addTags(assign);
    body.add(assign);

    if (IDalvikTyper.ENABLE_DVKTYPER) {
      JAssignStmt jassign = (JAssignStmt) assign;
      DalvikTyper.v().addConstraint(assign.getLeftOpBox(), assign.getRightOpBox());
    }
  }

  // public void setLocalToMove(Local l) {
  // local = l;
  // }
  // public void setExpr(Expr e) {
  // expr = e;
  // }

  @Override
  boolean overridesRegister(int register) {
    OneRegisterInstruction i = (OneRegisterInstruction) instruction;
    int dest = i.getRegisterA();
    return register == dest;
  }
}