Mercurial > hg > truffle

annotate graal/com.oracle.graal.loop/src/com/oracle/graal/loop/InductionVariable.java @ 14000:958c99d0790c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Split convert node into separate nodes for different conversions.
author Roland Schatz <roland.schatz@oracle.com>
date Fri, 21 Feb 2014 11:53:48 +0100
parents 2c4aa758ee18
children 8db6e76cb658
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
1 /*
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
2 * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved.
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
4 *
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
7 * published by the Free Software Foundation.
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
8 *
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
13 * accompanied this code).
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
14 *
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
18 *
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
20 * or visit www.oracle.com if you need additional information or have any
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
21 * questions.
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
22 */
6523
c8763a2deb0c rename packages in graal.loop to match project name
Doug Simon <doug.simon@oracle.com>
parents: 6522
diff changeset
23 package com.oracle.graal.loop;
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
24
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
25 import com.oracle.graal.graph.*;
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
26 import com.oracle.graal.nodes.*;
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 12655
diff changeset
27 import com.oracle.graal.nodes.type.*;
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
28
11263
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
29 /**
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
30 * This class describes a value node that is an induction variable in a counted loop.
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
31 */
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
32 public abstract class InductionVariable {
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
33
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
34 public enum Direction {
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
35 Up, Down;
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
36
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
37 public Direction opposite() {
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
38 switch (this) {
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
39 case Up:
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
40 return Down;
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
41 case Down:
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
42 return Up;
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
43 default:
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
44 throw GraalInternalError.shouldNotReachHere();
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
45 }
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
46 }
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
47 }
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
48
12655
2c4aa758ee18 made ConstantNodes external to a Graph (GRAAL-508)
Doug Simon <doug.simon@oracle.com>
parents: 11263
diff changeset
49 public abstract StructuredGraph graph();
2c4aa758ee18 made ConstantNodes external to a Graph (GRAAL-508)
Doug Simon <doug.simon@oracle.com>
parents: 11263
diff changeset
50
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
51 protected final LoopEx loop;
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
52
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
53 public InductionVariable(LoopEx loop) {
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
54 this.loop = loop;
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
55 }
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
56
9446
27733a62ba72 Fixes and improvements for induction variables
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7530
diff changeset
57 public LoopEx getLoop() {
27733a62ba72 Fixes and improvements for induction variables
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7530
diff changeset
58 return loop;
27733a62ba72 Fixes and improvements for induction variables
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7530
diff changeset
59 }
27733a62ba72 Fixes and improvements for induction variables
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7530
diff changeset
60
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
61 public abstract Direction direction();
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
62
11263
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
63 /**
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
64 * Returns the value node that is described by this InductionVariable instance.
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
65 */
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
66 public abstract ValueNode valueNode();
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
67
11263
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
68 /**
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
69 * Returns the node that gives the initial value of this induction variable.
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
70 */
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
71 public abstract ValueNode initNode();
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
72
11263
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
73 /**
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
74 * Returns the stride of the induction variable. The stride is the value that is added to the
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
75 * induction variable at each iteration.
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
76 */
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
77 public abstract ValueNode strideNode();
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
78
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
79 public abstract boolean isConstantInit();
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
80
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
81 public abstract boolean isConstantStride();
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
82
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
83 public abstract long constantInit();
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
84
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
85 public abstract long constantStride();
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
86
11263
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
87 /**
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
88 * Returns the extremum value of the induction variable. The extremum value is the value of the
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
89 * induction variable in the loop body of the last iteration.
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
90 */
9446
27733a62ba72 Fixes and improvements for induction variables
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7530
diff changeset
91 public ValueNode extremumNode() {
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 12655
diff changeset
92 return extremumNode(false, valueNode().stamp());
9446
27733a62ba72 Fixes and improvements for induction variables
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7530
diff changeset
93 }
27733a62ba72 Fixes and improvements for induction variables
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 7530
diff changeset
94
14000
958c99d0790c Split convert node into separate nodes for different conversions.
Roland Schatz <roland.schatz@oracle.com>
parents: 12655
diff changeset
95 public abstract ValueNode extremumNode(boolean assumePositiveTripCount, Stamp stamp);
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
96
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
97 public abstract boolean isConstantExtremum();
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 6523
diff changeset
98
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
99 public abstract long constantExtremum();
11263
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
100
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
101 /**
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
102 * Returns the exit value of the induction variable. The exit value is the value of the
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
103 * induction variable at the loop exit.
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
104 */
acf09b065eba Calculate exit value of counted loop induction variables.
Roland Schatz <roland.schatz@oracle.com>
parents: 9446
diff changeset
105 public abstract ValueNode exitValueNode();
5610
9f3250602d69 Preliminary counted loop detection
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
diff changeset
106 }