Mercurial > hg > truffle
annotate graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/ReadEliminationPhase.java @ 11249:7b416466e269
made VM_ERROR foreign call a leaf
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Wed, 07 Aug 2013 16:44:54 +0200 |
parents | c5fa76a20868 |
children | f091e0d6f4f3 |
rev | line source |
---|---|
3733
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
1 /* |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
4 * |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
5 * This code is free software; you can redistribute it and/or modify it |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
6 * under the terms of the GNU General Public License version 2 only, as |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
7 * published by the Free Software Foundation. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
8 * |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
12 * version 2 for more details (a copy is included in the LICENSE file that |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
13 * accompanied this code). |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
14 * |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
15 * You should have received a copy of the GNU General Public License version |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
16 * 2 along with this work; if not, write to the Free Software Foundation, |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
18 * |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
21 * questions. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
22 */ |
6526
ee651c726397
split phases out of graal.phases project into graal.phases.common project
Doug Simon <doug.simon@oracle.com>
parents:
6525
diff
changeset
|
23 package com.oracle.graal.phases.common; |
3733
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
24 |
5060
4ed4295ce15f
Update import statements.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
5059
diff
changeset
|
25 import com.oracle.graal.debug.*; |
4ed4295ce15f
Update import statements.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
5059
diff
changeset
|
26 import com.oracle.graal.graph.*; |
4ed4295ce15f
Update import statements.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
5059
diff
changeset
|
27 import com.oracle.graal.nodes.*; |
4ed4295ce15f
Update import statements.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
5059
diff
changeset
|
28 import com.oracle.graal.nodes.extended.*; |
6526
ee651c726397
split phases out of graal.phases project into graal.phases.common project
Doug Simon <doug.simon@oracle.com>
parents:
6525
diff
changeset
|
29 import com.oracle.graal.phases.*; |
3733
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
30 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
31 public class ReadEliminationPhase extends Phase { |
7530
5e3d1a68664e
applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents:
6526
diff
changeset
|
32 |
3733
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
33 @Override |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
34 protected void run(StructuredGraph graph) { |
4309
4a609a685fa4
changes to Node structures:
Lukas Stadler <lukas.stadler@jku.at>
parents:
3733
diff
changeset
|
35 for (FloatingReadNode n : graph.getNodes(FloatingReadNode.class)) { |
5820
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
36 if (isReadEliminable(n)) { |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
37 NodeMap<ValueNode> nodeMap = n.graph().createNodeMap(); |
5830
f28115ee6108
Do without the Top stamp for now, too little benefits
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5820
diff
changeset
|
38 ValueNode value = getValue(n, n.lastLocationAccess(), nodeMap); |
5820
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
39 Debug.log("Eliminated memory read %1.1s and replaced with node %s", n, value); |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
40 graph.replaceFloating(n, value); |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
41 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
42 } |
3733
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
43 } |
5820
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
44 |
9135
c5fa76a20868
Remove unused field.
Roland Schatz <roland.schatz@oracle.com>
parents:
8551
diff
changeset
|
45 private static boolean isReadEliminable(FloatingReadNode n) { |
5820
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
46 return isWrites(n, n.lastLocationAccess(), n.graph().createNodeBitMap()); |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
47 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
48 |
9135
c5fa76a20868
Remove unused field.
Roland Schatz <roland.schatz@oracle.com>
parents:
8551
diff
changeset
|
49 private static boolean isWrites(FloatingReadNode n, Node lastLocationAccess, NodeBitMap visited) { |
5820
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
50 if (lastLocationAccess == null) { |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
51 return false; |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
52 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
53 if (visited.isMarked(lastLocationAccess)) { |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
54 return true; // dataflow loops must come from Phis assume them ok until proven wrong |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
55 } |
7897
a58851061377
rename ValueProxyNode to ProxyNode
Lukas Stadler <lukas.stadler@jku.at>
parents:
7530
diff
changeset
|
56 if (lastLocationAccess instanceof ProxyNode) { |
a58851061377
rename ValueProxyNode to ProxyNode
Lukas Stadler <lukas.stadler@jku.at>
parents:
7530
diff
changeset
|
57 return isWrites(n, ((ProxyNode) lastLocationAccess).value(), visited); |
5847
d6257bd5e7f2
Make ReadEliminationPhase Value proxy aware now that FLoatingRead keeps loop closed form
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5830
diff
changeset
|
58 } |
5820
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
59 if (lastLocationAccess instanceof WriteNode) { |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
60 WriteNode other = (WriteNode) lastLocationAccess; |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
61 return other.object() == n.object() && other.location() == n.location(); |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
62 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
63 if (lastLocationAccess instanceof PhiNode) { |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
64 visited.mark(lastLocationAccess); |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
65 for (ValueNode value : ((PhiNode) lastLocationAccess).values()) { |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
66 if (!isWrites(n, value, visited)) { |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
67 return false; |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
68 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
69 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
70 return true; |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
71 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
72 return false; |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
73 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
74 |
9135
c5fa76a20868
Remove unused field.
Roland Schatz <roland.schatz@oracle.com>
parents:
8551
diff
changeset
|
75 private static ValueNode getValue(FloatingReadNode n, Node lastLocationAccess, NodeMap<ValueNode> nodeMap) { |
5820
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
76 ValueNode exisiting = nodeMap.get(lastLocationAccess); |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
77 if (exisiting != null) { |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
78 return exisiting; |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
79 } |
7897
a58851061377
rename ValueProxyNode to ProxyNode
Lukas Stadler <lukas.stadler@jku.at>
parents:
7530
diff
changeset
|
80 if (lastLocationAccess instanceof ProxyNode) { |
a58851061377
rename ValueProxyNode to ProxyNode
Lukas Stadler <lukas.stadler@jku.at>
parents:
7530
diff
changeset
|
81 ProxyNode proxy = (ProxyNode) lastLocationAccess; |
6307
d7f67808f970
Create ValueProxy nodes where necessary during ReadElimination
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5847
diff
changeset
|
82 ValueNode value = getValue(n, proxy.value(), nodeMap); |
8551
0f6dd67470d9
location identity on PhiNodes and ProxyNodes
Lukas Stadler <lukas.stadler@jku.at>
parents:
7897
diff
changeset
|
83 return ProxyNode.forValue(value, proxy.proxyPoint(), (StructuredGraph) lastLocationAccess.graph()); |
5847
d6257bd5e7f2
Make ReadEliminationPhase Value proxy aware now that FLoatingRead keeps loop closed form
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5830
diff
changeset
|
84 } |
5820
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
85 if (lastLocationAccess instanceof WriteNode) { |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
86 return ((WriteNode) lastLocationAccess).value(); |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
87 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
88 if (lastLocationAccess instanceof PhiNode) { |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
89 PhiNode phi = (PhiNode) lastLocationAccess; |
5830
f28115ee6108
Do without the Top stamp for now, too little benefits
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5820
diff
changeset
|
90 PhiNode newPhi = phi.graph().add(new PhiNode(n.kind(), phi.merge())); |
5820
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
91 nodeMap.set(lastLocationAccess, newPhi); |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
92 for (ValueNode value : phi.values()) { |
5830
f28115ee6108
Do without the Top stamp for now, too little benefits
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5820
diff
changeset
|
93 newPhi.addInput(getValue(n, value, nodeMap)); |
5820
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
94 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
95 return newPhi; |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
96 } |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
97 throw GraalInternalError.shouldNotReachHere(); |
547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
5387
diff
changeset
|
98 } |
3733
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
99 } |