Mercurial > hg > truffle
view graal/GraalCompiler/src/com/sun/c1x/ir/Constant.java @ 2853:0635ba16afe4
Reintroduce Logic subclasses, creating some Canonicalization related classes
author | Gilles Duboscq <gilles.duboscq@oracle.com> |
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date | Tue, 07 Jun 2011 15:52:55 +0200 |
parents | 14708c03abba |
children |
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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.sun.c1x.ir; import static com.sun.c1x.C1XCompilation.*; import com.oracle.graal.graph.*; import com.sun.c1x.debug.*; import com.sun.cri.ci.*; import com.sun.cri.ri.*; /** * The {@code Constant} instruction represents a constant such as an integer value, * long, float, object reference, address, etc. */ public final class Constant extends FloatingNode { private static final int INPUT_COUNT = 0; private static final int SUCCESSOR_COUNT = 0; public final CiConstant value; /** * Constructs a new instruction representing the specified constant. * @param value the constant * @param graph */ public Constant(CiConstant value, Graph graph) { super(value.kind.stackKind(), INPUT_COUNT, SUCCESSOR_COUNT, graph); this.value = value; } @Override public void accept(ValueVisitor v) { v.visitConstant(this); } /** * Creates an instruction for a double constant. * @param d the double value for which to create the instruction * @param graph * @return an instruction representing the double */ public static Constant forDouble(double d, Graph graph) { return new Constant(CiConstant.forDouble(d), graph); } /** * Creates an instruction for a float constant. * @param f the float value for which to create the instruction * @return an instruction representing the float */ public static Constant forFloat(float f, Graph graph) { return new Constant(CiConstant.forFloat(f), graph); } /** * Creates an instruction for an long constant. * @param i the long value for which to create the instruction * @return an instruction representing the long */ public static Constant forLong(long i, Graph graph) { return new Constant(CiConstant.forLong(i), graph); } /** * Creates an instruction for an integer constant. * @param i the integer value for which to create the instruction * @return an instruction representing the integer */ public static Constant forInt(int i, Graph graph) { return new Constant(CiConstant.forInt(i), graph); } /** * Creates an instruction for a boolean constant. * @param i the boolean value for which to create the instruction * @return an instruction representing the boolean */ public static Constant forBoolean(boolean i, Graph graph) { return new Constant(CiConstant.forBoolean(i), graph); } /** * Creates an instruction for an address (jsr/ret address) constant. * @param i the address value for which to create the instruction * @return an instruction representing the address */ public static Constant forJsr(int i, Graph graph) { return new Constant(CiConstant.forJsr(i), graph); } /** * Creates an instruction for an object constant. * @param o the object value for which to create the instruction * @return an instruction representing the object */ public static Constant forObject(Object o, Graph graph) { return new Constant(CiConstant.forObject(o), graph); } /** * Creates an instruction for a word constant. * @param val the word value for which to create the instruction * @return an instruction representing the word */ public static Constant forWord(long val, Graph graph) { return new Constant(CiConstant.forWord(val), graph); } public static Constant defaultForKind(CiKind kind, Graph graph) { switch(kind) { case Boolean: return Constant.forBoolean(false, graph); case Byte: case Char: case Short: case Int: return Constant.forInt(0, graph); case Double: return Constant.forDouble(0.0, graph); case Float: return Constant.forFloat(0.0f, graph); case Long: return Constant.forLong(0L, graph); case Object: return Constant.forObject(null, graph); case Word: return Constant.forWord(0L, graph); default: return null; } } @Override public String toString() { return super.toString() + "(" + value + ")"; } @Override public int valueNumber() { return 0x50000000 | value.hashCode(); } @Override public boolean valueEqual(Node i) { return i instanceof Constant && ((Constant) i).value.equivalent(this.value); } @Override public RiType declaredType() { RiRuntime runtime = compilation().runtime; if (kind.isPrimitive()) { runtime.asRiType(kind); } return runtime.getTypeOf(asConstant()); } @Override public RiType exactType() { return declaredType(); } @Override public void print(LogStream out) { out.print(value.valueString()); } @Override public String shortName() { return value.name(); } @Override public Node copy(Graph into) { Constant x = new Constant(value, into); return x; } }