Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/ConstantNode.java @ 6329:92bc58dc5b5e
More clean up and documentation in api.code and api.meta.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 07 Sep 2012 13:40:53 +0200 |
parents | 3b8bc07f8d17 |
children | 2463eb24b644 |
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/* * Copyright (c) 2009, 2011, 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; import java.util.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.iterators.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * The {@code ConstantNode} represents a constant such as an integer value, * long, float, object reference, address, etc. */ @NodeInfo(shortName = "Const", nameTemplate = "Const({p#rawvalue})") public class ConstantNode extends BooleanNode implements LIRLowerable { public final Constant value; protected ConstantNode(Constant value) { super(StampFactory.forConstant(value)); this.value = value; } /** * Constructs a new ConstantNode representing the specified constant. * @param value the constant */ protected ConstantNode(Constant value, MetaAccessProvider runtime) { super(StampFactory.forConstant(value, runtime)); this.value = value; } @Override public void generate(LIRGeneratorTool gen) { if (gen.canInlineConstant(value) || onlyUsedInFrameState()) { gen.setResult(this, value); } else { gen.setResult(this, gen.emitMove(value)); } } private boolean onlyUsedInFrameState() { return usages().filter(NodePredicates.isNotA(FrameState.class)).isEmpty(); } public static ConstantNode forConstant(Constant constant, MetaAccessProvider runtime, Graph graph) { if (constant.getKind() == Kind.Object) { return graph.unique(new ConstantNode(constant, runtime)); } else { return graph.unique(new ConstantNode(constant)); } } /** * Returns a node for a double constant. * @param d the double value for which to create the instruction * @param graph * @return a node for a double constant */ public static ConstantNode forDouble(double d, Graph graph) { return graph.unique(new ConstantNode(Constant.forDouble(d))); } /** * Returns a node for a float constant. * @param f the float value for which to create the instruction * @param graph * @return a node for a float constant */ public static ConstantNode forFloat(float f, Graph graph) { return graph.unique(new ConstantNode(Constant.forFloat(f))); } /** * Returns a node for an long constant. * @param i the long value for which to create the instruction * @param graph * @return a node for an long constant */ public static ConstantNode forLong(long i, Graph graph) { return graph.unique(new ConstantNode(Constant.forLong(i))); } /** * Returns a node for an integer constant. * @param i the integer value for which to create the instruction * @param graph * @return a node for an integer constant */ public static ConstantNode forInt(int i, Graph graph) { return graph.unique(new ConstantNode(Constant.forInt(i))); } /** * Returns a node for a boolean constant. * @param i the boolean value for which to create the instruction * @param graph * @return a node representing the boolean */ public static ConstantNode forBoolean(boolean i, Graph graph) { return graph.unique(new ConstantNode(Constant.forBoolean(i))); } /** * Returns a node for a byte constant. * @param i the byte value for which to create the instruction * @param graph * @return a node representing the byte */ public static ConstantNode forByte(byte i, Graph graph) { return graph.unique(new ConstantNode(Constant.forByte(i))); } /** * Returns a node for a char constant. * @param i the char value for which to create the instruction * @param graph * @return a node representing the char */ public static ConstantNode forChar(char i, Graph graph) { return graph.unique(new ConstantNode(Constant.forChar(i))); } /** * Returns a node for a short constant. * @param i the short value for which to create the instruction * @param graph * @return a node representing the short */ public static ConstantNode forShort(short i, Graph graph) { return graph.unique(new ConstantNode(Constant.forShort(i))); } /** * Returns a node for an address (jsr/ret address) constant. * @param i the address value for which to create the instruction * @param graph * @return a node representing the address */ public static ConstantNode forJsr(int i, Graph graph) { return graph.unique(new ConstantNode(Constant.forJsr(i))); } /** * Returns a node for an object constant. * @param o the object value for which to create the instruction * @param graph * @return a node representing the object */ public static ConstantNode forObject(Object o, MetaAccessProvider runtime, Graph graph) { return graph.unique(new ConstantNode(Constant.forObject(o), runtime)); } public static ConstantNode forIntegerKind(Kind kind, long value, Graph graph) { switch (kind) { case Byte: case Short: case Int: return ConstantNode.forInt((int) value, graph); case Long: return ConstantNode.forLong(value, graph); default: throw new InternalError("Should not reach here"); } } public static ConstantNode forFloatingKind(Kind kind, double value, Graph graph) { switch (kind) { case Float: return ConstantNode.forFloat((float) value, graph); case Double: return ConstantNode.forDouble(value, graph); default: throw new InternalError("Should not reach here"); } } public static ConstantNode defaultForKind(Kind kind, Graph graph) { switch(kind) { case Boolean: return ConstantNode.forBoolean(false, graph); case Byte: case Char: case Short: case Int: return ConstantNode.forInt(0, graph); case Double: return ConstantNode.forDouble(0.0, graph); case Float: return ConstantNode.forFloat(0.0f, graph); case Long: return ConstantNode.forLong(0L, graph); case Object: return ConstantNode.forObject(null, null, graph); default: return null; } } @Override public Map<Object, Object> getDebugProperties(Map<Object, Object> map) { Map<Object, Object> properties = super.getDebugProperties(map); properties.put("rawvalue", value.getKind().isObject() ? value.getKind().format(value.boxedValue()) : value.boxedValue()); return properties; } @Override public String toString(Verbosity verbosity) { if (verbosity == Verbosity.Name) { return super.toString(Verbosity.Name) + "(" + value.getKind().format(value.boxedValue()) + ")"; } else { return super.toString(verbosity); } } }