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annotate graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/ir/IntegerDiv.java @ 3528:6b841b6b2437

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First round of refactoring.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Tue, 09 Aug 2011 23:56:10 +0200
parents 3e21ab23406b
children
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.max.graal.compiler.ir;
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24
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25 import com.oracle.max.graal.compiler.nodes.base.*;
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26 import com.oracle.max.graal.compiler.nodes.spi.*;
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27 import com.oracle.max.graal.graph.*;
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28 import com.sun.cri.bytecode.*;
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29 import com.sun.cri.ci.*;
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30
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31 @NodeInfo(shortName = "/")
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32 public final class IntegerDiv extends IntegerArithmeticNode implements Canonicalizable {
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33
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34 public IntegerDiv(CiKind kind, ValueNode x, ValueNode y, Graph graph) {
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35 super(kind, kind == CiKind.Int ? Bytecodes.IDIV : Bytecodes.LDIV, x, y, graph);
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36 }
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37
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38 @Override
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39 public Node canonical(NotifyReProcess reProcess) {
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40 if (x().isConstant() && y().isConstant()) {
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41 long yConst = y().asConstant().asLong();
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42 if (yConst == 0) {
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43 return this; // this will trap, can not canonicalize
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44 }
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45 if (kind == CiKind.Int) {
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46 return Constant.forInt(x().asConstant().asInt() / (int) yConst, graph());
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47 } else {
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48 assert kind == CiKind.Long;
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49 return Constant.forLong(x().asConstant().asLong() / yConst, graph());
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50 }
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51 } else if (y().isConstant()) {
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52 long c = y().asConstant().asLong();
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53 if (c == 1) {
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54 return x();
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55 }
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56 }
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57 return this;
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58 }
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59 }