/*
* Bytecode Analysis Framework
* Copyright (C) 2003,2004 University of Maryland
*
* This library 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 library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package edu.umd.cs.findbugs.ba.vna;
import edu.umd.cs.findbugs.SystemProperties;
/**
* Global flags controlling ValueNumberAnalysis.
*/
public interface ValueNumberAnalysisFeatures {
/**
* When set, perform redundant load elimination and forward substitution.
* Note that we do <em>not</em> do this in a correctness-preserving way! For
* example, we don't kill loads when methods are called, even though those
* methods could change heap values. The intent here is simply to try to
* handle situations where a field is read multiple times, where the intent
* of the programmer is clearly that the loaded values will be the same in
* each case.
* <p/>
* <p>
* Eventually, we might do interprocedural analysis that would allow
* accurate modeling of which fields a called method could modify, which
* would allow a more correct implementation.
*/
public static final boolean REDUNDANT_LOAD_ELIMINATION = !SystemProperties.getBoolean("vna.noRLE");
/**
* Debug redundant load elimination.
*/
public static final boolean RLE_DEBUG = SystemProperties.getBoolean("vna.rle.debug");
}
// vim:ts=4