Mercurial > hg > graal-jvmci-8
comparison 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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2506:4a3bf8a5bf41 | 2507:9ec15d6914ca |
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1 /* | |
2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 */ | |
23 package com.sun.c1x.ir; | |
24 | |
25 import com.sun.c1x.debug.*; | |
26 import com.sun.c1x.value.*; | |
27 import com.sun.cri.ci.*; | |
28 | |
29 /** | |
30 * The {@code LoadPointer} instruction represents a read of a pointer. | |
31 * This instruction is part of the HIR support for low-level operations, such as safepoints, | |
32 * stack banging, etc, and does not correspond to a Java operation. | |
33 * | |
34 * @author Ben L. Titzer | |
35 * @author Doug Simon | |
36 */ | |
37 public final class LoadPointer extends PointerOp { | |
38 | |
39 /** | |
40 * Creates an instruction for a pointer load. | |
41 * | |
42 * @param kind the kind of value loaded from the pointer | |
43 * @param opcode the opcode of the instruction | |
44 * @param pointer the value producing the pointer | |
45 * @param displacement the value producing the displacement. This may be {@code null}. | |
46 * @param offsetOrIndex the value producing the scaled-index or the byte offset depending on whether {@code displacement} is {@code null} | |
47 * @param stateBefore the state before | |
48 * @param isVolatile {@code true} if the access is volatile | |
49 * @see PointerOp#PointerOp(CiKind, int, Value, Value, Value, FrameState, boolean) | |
50 */ | |
51 public LoadPointer(CiKind kind, int opcode, Value pointer, Value displacement, Value offsetOrIndex, FrameState stateBefore, boolean isVolatile) { | |
52 super(kind, kind, opcode, pointer, displacement, offsetOrIndex, stateBefore, isVolatile); | |
53 } | |
54 | |
55 @Override | |
56 public void accept(ValueVisitor v) { | |
57 v.visitLoadPointer(this); | |
58 } | |
59 | |
60 @Override | |
61 public void print(LogStream out) { | |
62 out.print("*(").print(pointer()); | |
63 if (displacement() == null) { | |
64 out.print(" + ").print(offset()); | |
65 } else { | |
66 out.print(" + ").print(displacement()).print(" + (").print(index()).print(" * sizeOf(" + dataKind + "))"); | |
67 } | |
68 out.print(")"); | |
69 } | |
70 } |