Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/ConvertNode.java @ 16811:5d468add216f
added @NodeInfo annotations to all Node classes
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 13 Aug 2014 18:25:45 +0200 |
parents | 0993768dfc8e |
children | cbd42807a31f |
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/* * Copyright (c) 2014, 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.nodes.calc; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.calc.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; /** * Represents a conversion between primitive types. */ @NodeInfo public abstract class ConvertNode extends UnaryNode implements ArithmeticOperation { protected ConvertNode(Stamp stamp, ValueNode value) { super(stamp, value); } public abstract Constant convert(Constant c); public abstract Constant reverse(Constant c); /** * Check whether a conversion is lossless. * * @return true iff reverse(convert(c)) == c for all c */ public abstract boolean isLossless(); /** * Check whether a conversion preserves comparison order. * * @param op a comparison operator * @return true iff (c1 op c2) == (convert(c1) op convert(c2)) for all c1, c2 */ public boolean preservesOrder(Condition op) { return isLossless(); } @Override public Constant evalConst(Constant... inputs) { assert inputs.length == 1; return convert(inputs[0]); } }