Mercurial > hg > graal-compiler
view graal/com.oracle.graal.loop/src/com/oracle/graal/loop/MathUtil.java @ 19277:6bef14568a54
eclipseformat
author | Josef Eisl <josef.eisl@jku.at> |
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date | Wed, 11 Feb 2015 16:13:02 +0100 |
parents | ef52cebd4030 |
children | 05183a084a08 |
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/* * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.loop; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; /** * Utility methods to perform integer math with some obvious constant folding first. */ public class MathUtil { private static boolean isConstantOne(ValueNode v1) { return v1.isConstant() && v1.stamp() instanceof IntegerStamp && v1.asJavaConstant().asLong() == 1; } private static boolean isConstantZero(ValueNode v1) { return v1.isConstant() && v1.stamp() instanceof IntegerStamp && v1.asJavaConstant().asLong() == 0; } public static ValueNode add(StructuredGraph graph, ValueNode v1, ValueNode v2) { if (isConstantZero(v1)) { return v2; } if (isConstantZero(v2)) { return v1; } return BinaryArithmeticNode.add(graph, v1, v2); } public static ValueNode mul(StructuredGraph graph, ValueNode v1, ValueNode v2) { if (isConstantOne(v1)) { return v2; } if (isConstantOne(v2)) { return v1; } return BinaryArithmeticNode.mul(graph, v1, v2); } public static ValueNode sub(StructuredGraph graph, ValueNode v1, ValueNode v2) { if (isConstantZero(v2)) { return v1; } return BinaryArithmeticNode.sub(graph, v1, v2); } public static ValueNode divBefore(StructuredGraph graph, FixedNode before, ValueNode dividend, ValueNode divisor) { if (isConstantOne(divisor)) { return dividend; } IntegerDivNode div = graph.add(new IntegerDivNode(dividend, divisor)); graph.addBeforeFixed(before, div); return div; } }