Mercurial > hg > graal-jvmci-8
annotate graal/Compiler/src/com/sun/c1x/ir/LoadPointer.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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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.debug.*; |
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26 import com.sun.c1x.value.*; |
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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 LoadPointer} instruction represents a read of a pointer. |
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31 * This instruction is part of the HIR support for low-level operations, such as safepoints, |
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32 * stack banging, etc, and does not correspond to a Java operation. |
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33 * |
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34 * @author Ben L. Titzer |
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35 * @author Doug Simon |
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36 */ |
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37 public final class LoadPointer extends PointerOp { |
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38 |
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39 /** |
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40 * Creates an instruction for a pointer load. |
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41 * |
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42 * @param kind the kind of value loaded from the pointer |
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43 * @param opcode the opcode of the instruction |
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44 * @param pointer the value producing the pointer |
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45 * @param displacement the value producing the displacement. This may be {@code null}. |
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46 * @param offsetOrIndex the value producing the scaled-index or the byte offset depending on whether {@code displacement} is {@code null} |
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47 * @param stateBefore the state before |
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48 * @param isVolatile {@code true} if the access is volatile |
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49 * @see PointerOp#PointerOp(CiKind, int, Value, Value, Value, FrameState, boolean) |
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50 */ |
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51 public LoadPointer(CiKind kind, int opcode, Value pointer, Value displacement, Value offsetOrIndex, FrameState stateBefore, boolean isVolatile) { |
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52 super(kind, kind, opcode, pointer, displacement, offsetOrIndex, stateBefore, isVolatile); |
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53 } |
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54 |
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55 @Override |
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56 public void accept(ValueVisitor v) { |
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57 v.visitLoadPointer(this); |
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58 } |
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59 |
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60 @Override |
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61 public void print(LogStream out) { |
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62 out.print("*(").print(pointer()); |
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63 if (displacement() == null) { |
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64 out.print(" + ").print(offset()); |
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65 } else { |
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66 out.print(" + ").print(displacement()).print(" + (").print(index()).print(" * sizeOf(" + dataKind + "))"); |
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67 } |
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68 out.print(")"); |
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69 } |
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70 } |