Mercurial > hg > truffle

annotate graal/GraalCompiler/src/com/sun/c1x/ir/Instruction.java @ 2521:2f271a85d104

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Removed intrinsic-related instructions
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 16:40:09 +0200
parents 16b9a8b5ad39
children 0f9eeb15e636
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2507
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
1 /*
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
2 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
4 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
7 * published by the Free Software Foundation.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
8 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
13 * accompanied this code).
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
14 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
18 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
20 * or visit www.oracle.com if you need additional information or have any
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
21 * questions.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
22 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
23 package com.sun.c1x.ir;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
24
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
25 import java.util.*;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
26
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
27 import com.sun.c1x.*;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
28 import com.sun.c1x.value.*;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
29 import com.sun.cri.ci.*;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
30
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
31 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
32 * Denotes an instruction node in the IR, which is a {@link Value} that
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
33 * can be added to a basic block (whereas other {@link Value} nodes such as {@link Phi} and
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
34 * {@link Local} cannot be added to basic blocks).
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
35 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
36 * Subclasses of instruction represent arithmetic and object operations,
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
37 * control flow operators, phi statements, method calls, the start of basic blocks, and
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
38 * the end of basic blocks.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
39 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
40 * Instruction nodes are chained together in a basic block through the embedded
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
41 * {@link Instruction#next} field. An Instruction may also have a list of {@link ExceptionHandler}s.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
42 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
43 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
44 * @author Ben L. Titzer
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
45 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
46 public abstract class Instruction extends Value {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
47
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
48 public static final int INVOCATION_ENTRY_BCI = -1; // XXX: not currently used
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
49 public static final int SYNCHRONIZATION_ENTRY_BCI = -1;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
50
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
51 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
52 * Index of bytecode that generated this node when appended in a basic block.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
53 * Negative values indicate special cases.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
54 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
55 private int bci;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
56
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
57 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
58 * Links to next instruction in a basic block or to {@code} itself if not in a block.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
59 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
60 private Instruction next = this;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
61
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
62 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
63 * List of associated exception handlers.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
64 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
65 private List<ExceptionHandler> exceptionHandlers = ExceptionHandler.ZERO_HANDLERS;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
66
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
67 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
68 * Constructs a new instruction with the specified value type.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
69 * @param kind the value type for this instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
70 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
71 public Instruction(CiKind kind) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
72 super(kind);
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
73 C1XMetrics.HIRInstructions++;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
74 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
75
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
76 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
77 * Gets the bytecode index of this instruction.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
78 * @return the bytecode index of this instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
79 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
80 public final int bci() {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
81 return bci;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
82 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
83
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
84 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
85 * Sets the bytecode index of this instruction.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
86 * @param bci the new bytecode index for this instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
87 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
88 public final void setBCI(int bci) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
89 assert bci >= 0 || bci == SYNCHRONIZATION_ENTRY_BCI;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
90 this.bci = bci;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
91 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
92
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
93 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
94 * Checks whether this instruction has already been added to its basic block.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
95 * @return {@code true} if this instruction has been added to the basic block containing it
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
96 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
97 public final boolean isAppended() {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
98 return next != this;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
99 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
100
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
101 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
102 * Gets the next instruction after this one in the basic block, or {@code null}
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
103 * if this instruction is the end of a basic block.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
104 * @return the next instruction after this one in the basic block
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
105 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
106 public final Instruction next() {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
107 if (next == this) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
108 return null;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
109 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
110 return next;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
111 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
112
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
113 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
114 * Sets the next instruction for this instruction. Note that it is illegal to
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
115 * set the next field of a phi, block end, or local instruction.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
116 * @param next the next instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
117 * @param bci the bytecode index of the next instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
118 * @return the new next instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
119 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
120 public final Instruction setNext(Instruction next, int bci) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
121 this.next = next;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
122 if (next != null) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
123 assert !(this instanceof BlockEnd);
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
124 next.setBCI(bci);
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
125 if (next.next == next) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
126 next.next = null;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
127 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
128 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
129 return next;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
130 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
131
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
132 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
133 * Re-sets the next instruction for this instruction. Note that it is illegal to
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
134 * set the next field of a phi, block end, or local instruction.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
135 * @param next the next instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
136 * @return the new next instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
137 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
138 public final Instruction resetNext(Instruction next) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
139 if (next != null) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
140 assert !(this instanceof BlockEnd);
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
141 this.next = next;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
142 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
143 return next;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
144 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
145
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
146 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
147 * Gets the instruction preceding this instruction in the specified basic block.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
148 * Note that instructions do not directly refer to their previous instructions,
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
149 * and therefore this operation much search from the beginning of the basic
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
150 * block, thereby requiring time linear in the size of the basic block in the worst
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
151 * case. Use with caution!
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
152 * @param block the basic block that contains this instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
153 * @return the instruction before this instruction in the basic block
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
154 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
155 public final Instruction prev(BlockBegin block) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
156 Instruction p = null;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
157 Instruction q = block;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
158 while (q != this) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
159 assert q != null : "this instruction is not in the specified basic block";
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
160 p = q;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
161 q = q.next();
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
162 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
163 return p;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
164 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
165
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
166 @Override
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
167 public BlockBegin block() {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
168 // TODO(tw): Make this more efficient.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
169 Instruction cur = this;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
170 while (!(cur instanceof BlockEnd)) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
171 cur = cur.next;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
172 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
173 return ((BlockEnd) cur).begin;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
174 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
175
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
176 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
177 * Gets the list of exception handlers associated with this instruction.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
178 * @return the list of exception handlers for this instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
179 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
180 public final List<ExceptionHandler> exceptionHandlers() {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
181 return exceptionHandlers;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
182 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
183
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
184 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
185 * Sets the list of exception handlers for this instruction.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
186 * @param exceptionHandlers the exception handlers
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
187 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
188 public final void setExceptionHandlers(List<ExceptionHandler> exceptionHandlers) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
189 this.exceptionHandlers = exceptionHandlers;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
190 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
191
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
192 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
193 * Compute the value number of this Instruction. Local and global value numbering
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
194 * optimizations use a hash map, and the value number provides a hash code.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
195 * If the instruction cannot be value numbered, then this method should return
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
196 * {@code 0}.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
197 * @return the hashcode of this instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
198 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
199 public int valueNumber() {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
200 return 0;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
201 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
202
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
203 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
204 * Checks that this instruction is equal to another instruction for the purposes
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
205 * of value numbering.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
206 * @param i the other instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
207 * @return {@code true} if this instruction is equivalent to the specified
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
208 * instruction w.r.t. value numbering
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
209 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
210 public boolean valueEqual(Instruction i) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
211 return false;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
212 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
213
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
214 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
215 * Gets the name of this instruction as a string.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
216 * @return the name of this instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
217 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
218 public final String name() {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
219 return getClass().getSimpleName();
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
220 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
221
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
222 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
223 * Tests whether this instruction can trap. This is conservative; it does not take
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
224 * into account analysis results that may eliminate the possibility of this
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
225 * instruction from trapping.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
226 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
227 * @return {@code true} if this instruction can cause a trap.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
228 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
229 public boolean canTrap() {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
230 return false;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
231 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
232
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
233 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
234 * Apply the specified closure to all the values of this instruction, including
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
235 * input values, state values, and other values.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
236 * @param closure the closure to apply
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
237 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
238 public final void allValuesDo(ValueClosure closure) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
239 inputValuesDo(closure);
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
240 FrameState stateBefore = stateBefore();
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
241 if (stateBefore != null) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
242 stateBefore.valuesDo(closure);
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
243 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
244 FrameState stateAfter = stateAfter();
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
245 if (stateAfter != null) {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
246 stateAfter.valuesDo(closure);
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
247 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
248 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
249
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
250 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
251 * Gets the state before the instruction, if it is recorded.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
252 * @return the state before the instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
253 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
254 public FrameState stateBefore() {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
255 return null;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
256 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
257
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
258 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
259 * Gets the state after the instruction, if it is recorded. Typically only
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
260 * instances of {@link BlockEnd} have a non-null state after.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
261 * @return the state after the instruction
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
262 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
263 public FrameState stateAfter() {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
264 return null;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
265 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
266 }