/*
* @(#)DivRemExpression.java 1.1 95/10/06 Arthur van Hoff
*
* Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for NON-COMMERCIAL purposes and without
* fee is hereby granted provided that this copyright notice
* appears in all copies. Please refer to the file "copyright.html"
* for further important copyright and licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
* THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
*/
package sun.tools.tree;
import sun.tools.java.*;
import sun.tools.asm.Assembler;
import java.util.Hashtable;
abstract public
class DivRemExpression extends BinaryArithmeticExpression {
/**
* constructor
*/
public DivRemExpression(int op, int where, Expression left, Expression right) {
super(op, where, left, right);
}
/**
* Inline
*/
public Expression inline(Environment env, Context ctx) {
// Do not toss out integer divisions or remainders since they
// can cause a division by zero.
if (type.inMask(TM_INTEGER)) {
right = right.inlineValue(env, ctx);
if (right.isConstant() && !right.equals(0)) {
// We know the division can be elided
left = left.inline(env, ctx);
return left;
} else {
left = left.inlineValue(env, ctx);
try {
return eval().simplify();
} catch (ArithmeticException e) {
env.error(where, "arithmetic.exception");
return this;
}
}
} else {
// float & double divisions don't cause arithmetic errors
return super.inline(env, ctx);
}
}
}