Mercurial > hg > truffle
annotate graal/GraalCompiler/src/com/sun/c1x/ir/Op2.java @ 2538:e1ba5a93e997
Clean up on Value class and LIRGenerator/LIRItem-related things.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 20:13:54 +0200 |
parents | 16b9a8b5ad39 |
children | 3e0e65161345 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2009, 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.sun.c1x.ir; |
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24 |
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25 import com.sun.c1x.util.*; |
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26 import com.sun.cri.bytecode.*; |
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27 import com.sun.cri.ci.*; |
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28 |
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29 /** |
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30 * The {@code Op2} class is the base of arithmetic and logic operations with two inputs. |
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31 * |
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32 * @author Ben L. Titzer |
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33 */ |
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34 public abstract class Op2 extends Instruction { |
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35 |
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36 /** |
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37 * The opcode of this instruction. |
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38 */ |
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39 public final int opcode; |
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40 |
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41 Value x; |
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42 Value y; |
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43 |
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44 /** |
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45 * Creates a new Op2 instance. |
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46 * @param kind the result type of this instruction |
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47 * @param opcode the bytecode opcode |
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48 * @param x the first input instruction |
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49 * @param y the second input instruction |
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50 */ |
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51 public Op2(CiKind kind, int opcode, Value x, Value y) { |
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52 super(kind); |
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53 this.opcode = opcode; |
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54 this.x = x; |
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55 this.y = y; |
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56 } |
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57 |
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58 /** |
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59 * Gets the first input to this instruction. |
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60 * @return the first input to this instruction |
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61 */ |
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62 public final Value x() { |
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63 return x; |
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64 } |
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65 |
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66 /** |
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67 * Gets the second input to this instruction. |
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68 * @return the second input to this instruction |
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69 */ |
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70 public final Value y() { |
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71 return y; |
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72 } |
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73 |
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74 /** |
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75 * Swaps the operands of this instruction. This is only legal for commutative operations. |
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76 */ |
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77 public void swapOperands() { |
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78 assert Bytecodes.isCommutative(opcode); |
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79 Value t = x; |
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80 x = y; |
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81 y = t; |
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82 } |
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83 |
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84 /** |
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85 * Iterates over the inputs to this instruction. |
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86 * @param closure the closure to apply to each input value |
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87 */ |
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88 @Override |
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89 public void inputValuesDo(ValueClosure closure) { |
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90 x = closure.apply(x); |
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91 y = closure.apply(y); |
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92 } |
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93 |
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94 @Override |
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95 public int valueNumber() { |
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96 return Util.hash2(opcode, x, y); |
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97 } |
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98 |
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99 @Override |
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100 public boolean valueEqual(Instruction i) { |
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101 if (i instanceof Op2) { |
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102 Op2 o = (Op2) i; |
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103 return opcode == o.opcode && x == o.x && y == o.y; |
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104 } |
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105 return false; |
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106 } |
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107 } |