Mercurial > hg > truffle
annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/type/StampTool.java @ 18490:ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Mon, 24 Nov 2014 13:53:14 +0100 |
parents | ad3c2cacdd1a |
children | 1b7dbb81df4f |
rev | line source |
---|---|
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
1 /* |
18490
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved. |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
4 * |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
5 * This code is free software; you can redistribute it and/or modify it |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
6 * under the terms of the GNU General Public License version 2 only, as |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
7 * published by the Free Software Foundation. |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
8 * |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
12 * version 2 for more details (a copy is included in the LICENSE file that |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
13 * accompanied this code). |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
14 * |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
15 * You should have received a copy of the GNU General Public License version |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
16 * 2 along with this work; if not, write to the Free Software Foundation, |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
18 * |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
21 * questions. |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
22 */ |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
23 package com.oracle.graal.nodes.type; |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
24 |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
25 import java.util.*; |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
26 |
17196
189479d72dc8
Move bit manipulation methods to CodeUtil class.
Roland Schatz <roland.schatz@oracle.com>
parents:
16585
diff
changeset
|
27 import com.oracle.graal.api.code.*; |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
28 import com.oracle.graal.api.meta.*; |
15198
2c0cfbf454b5
Move LIRTypeTool and Stamp to graal.compiler.common.
Josef Eisl <josef.eisl@jku.at>
parents:
15132
diff
changeset
|
29 import com.oracle.graal.compiler.common.type.*; |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
30 import com.oracle.graal.nodes.*; |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
31 |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
32 /** |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
33 * Helper class that is used to keep all stamp-related operations in one place. |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
34 */ |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
35 public class StampTool { |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
36 |
18364
ad3c2cacdd1a
Remove StampProvider interface.
Roland Schatz <roland.schatz@oracle.com>
parents:
17344
diff
changeset
|
37 public static Stamp meet(Collection<? extends ValueNode> values) { |
ad3c2cacdd1a
Remove StampProvider interface.
Roland Schatz <roland.schatz@oracle.com>
parents:
17344
diff
changeset
|
38 Iterator<? extends ValueNode> iterator = values.iterator(); |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
39 if (iterator.hasNext()) { |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
40 Stamp stamp = iterator.next().stamp(); |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
41 while (iterator.hasNext()) { |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
42 stamp = stamp.meet(iterator.next().stamp()); |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
43 } |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
44 return stamp; |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
45 } else { |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
46 return StampFactory.forVoid(); |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
47 } |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
48 } |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
49 |
16585
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
50 public static Stamp rightShift(Stamp value, Stamp shift) { |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
51 if (value instanceof IntegerStamp && shift instanceof IntegerStamp) { |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
52 return rightShift((IntegerStamp) value, (IntegerStamp) shift); |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
53 } |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
54 return value.illegal(); |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
55 } |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
56 |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
57 public static Stamp rightShift(IntegerStamp value, IntegerStamp shift) { |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
58 int bits = value.getBits(); |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
59 if (shift.lowerBound() == shift.upperBound()) { |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
60 int extraBits = 64 - bits; |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
61 long shiftMask = bits > 32 ? 0x3FL : 0x1FL; |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
62 long shiftCount = shift.lowerBound() & shiftMask; |
17196
189479d72dc8
Move bit manipulation methods to CodeUtil class.
Roland Schatz <roland.schatz@oracle.com>
parents:
16585
diff
changeset
|
63 long defaultMask = CodeUtil.mask(bits); |
16585
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
64 // shifting back and forth performs sign extension |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
65 long downMask = (value.downMask() << extraBits) >> (shiftCount + extraBits) & defaultMask; |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
66 long upMask = (value.upMask() << extraBits) >> (shiftCount + extraBits) & defaultMask; |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
67 return new IntegerStamp(bits, value.lowerBound() >> shiftCount, value.upperBound() >> shiftCount, downMask, upMask); |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
68 } |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
69 long mask = IntegerStamp.upMaskFor(bits, value.lowerBound(), value.upperBound()); |
17199
88012c1750a0
Move bit logic nodes into the arithmetic node hierarchies.
Roland Schatz <roland.schatz@oracle.com>
parents:
17198
diff
changeset
|
70 return IntegerStamp.stampForMask(bits, 0, mask); |
16585
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
71 } |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
72 |
11265 | 73 public static Stamp unsignedRightShift(Stamp value, Stamp shift) { |
74 if (value instanceof IntegerStamp && shift instanceof IntegerStamp) { | |
75 return unsignedRightShift((IntegerStamp) value, (IntegerStamp) shift); | |
76 } | |
13999
f2b300c6e621
Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents:
12677
diff
changeset
|
77 return value.illegal(); |
11265 | 78 } |
79 | |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
80 public static Stamp unsignedRightShift(IntegerStamp value, IntegerStamp shift) { |
13999
f2b300c6e621
Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents:
12677
diff
changeset
|
81 int bits = value.getBits(); |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
82 if (shift.lowerBound() == shift.upperBound()) { |
13999
f2b300c6e621
Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents:
12677
diff
changeset
|
83 long shiftMask = bits > 32 ? 0x3FL : 0x1FL; |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
84 long shiftCount = shift.lowerBound() & shiftMask; |
16585
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
85 long downMask = value.downMask() >>> shiftCount; |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
86 long upMask = value.upMask() >>> shiftCount; |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
87 if (value.lowerBound() < 0) { |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
88 return new IntegerStamp(bits, downMask, upMask, downMask, upMask); |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
89 } else { |
0d3a4532a28c
better stamps for RightShiftNode
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16452
diff
changeset
|
90 return new IntegerStamp(bits, value.lowerBound() >>> shiftCount, value.upperBound() >>> shiftCount, downMask, upMask); |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
91 } |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
92 } |
13999
f2b300c6e621
Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents:
12677
diff
changeset
|
93 long mask = IntegerStamp.upMaskFor(bits, value.lowerBound(), value.upperBound()); |
17199
88012c1750a0
Move bit logic nodes into the arithmetic node hierarchies.
Roland Schatz <roland.schatz@oracle.com>
parents:
17198
diff
changeset
|
94 return IntegerStamp.stampForMask(bits, 0, mask); |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
95 } |
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
96 |
11265 | 97 public static Stamp leftShift(Stamp value, Stamp shift) { |
98 if (value instanceof IntegerStamp && shift instanceof IntegerStamp) { | |
99 return leftShift((IntegerStamp) value, (IntegerStamp) shift); | |
100 } | |
13999
f2b300c6e621
Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents:
12677
diff
changeset
|
101 return value.illegal(); |
11265 | 102 } |
103 | |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
104 public static Stamp leftShift(IntegerStamp value, IntegerStamp shift) { |
13999
f2b300c6e621
Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents:
12677
diff
changeset
|
105 int bits = value.getBits(); |
17196
189479d72dc8
Move bit manipulation methods to CodeUtil class.
Roland Schatz <roland.schatz@oracle.com>
parents:
16585
diff
changeset
|
106 long defaultMask = CodeUtil.mask(bits); |
11352
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
107 if (value.upMask() == 0) { |
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
108 return value; |
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
109 } |
13999
f2b300c6e621
Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents:
12677
diff
changeset
|
110 int shiftBits = bits > 32 ? 6 : 5; |
f2b300c6e621
Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents:
12677
diff
changeset
|
111 long shiftMask = bits > 32 ? 0x3FL : 0x1FL; |
16452
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
112 if (shift.lowerBound() == shift.upperBound()) { |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
113 int shiftAmount = (int) (shift.lowerBound() & shiftMask); |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
114 if (shiftAmount == 0) { |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
115 return value; |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
116 } |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
117 // the mask of bits that will be lost or shifted into the sign bit |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
118 long removedBits = -1L << (bits - shiftAmount - 1); |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
119 if ((value.lowerBound() & removedBits) == 0 && (value.upperBound() & removedBits) == 0) { |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
120 // use a better stamp if neither lower nor upper bound can lose bits |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
121 return new IntegerStamp(bits, value.lowerBound() << shiftAmount, value.upperBound() << shiftAmount, value.downMask() << shiftAmount, value.upMask() << shiftAmount); |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
122 } |
41906973537e
better stamps for left shifts with fixed shift amount
Lukas Stadler <lukas.stadler@oracle.com>
parents:
16158
diff
changeset
|
123 } |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
124 if ((shift.lowerBound() >>> shiftBits) == (shift.upperBound() >>> shiftBits)) { |
11352
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
125 long downMask = defaultMask; |
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
126 long upMask = 0; |
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
127 for (long i = shift.lowerBound(); i <= shift.upperBound(); i++) { |
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
128 if (shift.contains(i)) { |
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
129 downMask &= value.downMask() << (i & shiftMask); |
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
130 upMask |= value.upMask() << (i & shiftMask); |
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
131 } |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
132 } |
17199
88012c1750a0
Move bit logic nodes into the arithmetic node hierarchies.
Roland Schatz <roland.schatz@oracle.com>
parents:
17198
diff
changeset
|
133 Stamp result = IntegerStamp.stampForMask(bits, downMask, upMask & defaultMask); |
11352
8185c119d731
"always set" bit mask on IntegerStamps
Lukas Stadler <lukas.stadler@jku.at>
parents:
11265
diff
changeset
|
134 return result; |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
135 } |
13999
f2b300c6e621
Refactor Stamp hierarchy.
Roland Schatz <roland.schatz@oracle.com>
parents:
12677
diff
changeset
|
136 return value.unrestricted(); |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
137 } |
6313
7ac010ae8c97
Add inferStamp for a number of ConvertNode's operations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
6299
diff
changeset
|
138 |
14863
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
139 /** |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
140 * Compute the stamp resulting from the unsigned comparison being true. |
15131
9c1e53adc159
Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents:
14863
diff
changeset
|
141 * |
14863
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
142 * @return null if it's can't be true or it nothing useful can be encoded. |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
143 */ |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
144 public static Stamp unsignedCompare(Stamp stamp, Stamp stamp2) { |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
145 IntegerStamp x = (IntegerStamp) stamp; |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
146 IntegerStamp y = (IntegerStamp) stamp2; |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
147 if (x == x.unrestricted() && y == y.unrestricted()) { |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
148 // Don't know anything. |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
149 return null; |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
150 } |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
151 // c <| n, where c is a constant and n is known to be positive. |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
152 if (x.lowerBound() == x.upperBound()) { |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
153 if (y.isPositive()) { |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
154 if (x.lowerBound() == (1 << x.getBits()) - 1) { |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
155 // Constant is MAX_VALUE which must fail. |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
156 return null; |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
157 } |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
158 if (x.lowerBound() <= y.lowerBound()) { |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
159 // Test will fail. Return illegalStamp instead? |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
160 return null; |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
161 } |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
162 // If the test succeeds then this proves that n is at greater than c so the bounds |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
163 // are [c+1..-n.upperBound)]. |
15131
9c1e53adc159
Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents:
14863
diff
changeset
|
164 return StampFactory.forInteger(x.getBits(), x.lowerBound() + 1, y.upperBound()); |
14863
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
165 } |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
166 return null; |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
167 } |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
168 // n <| c, where c is a strictly positive constant |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
169 if (y.lowerBound() == y.upperBound() && y.isStrictlyPositive()) { |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
170 // The test proves that n is positive and less than c, [0..c-1] |
15131
9c1e53adc159
Remove unsigned flag from IntegerStamp.
Roland Schatz <roland.schatz@oracle.com>
parents:
14863
diff
changeset
|
171 return StampFactory.forInteger(y.getBits(), 0, y.lowerBound() - 1); |
14863
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
172 } |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
173 return null; |
ea712c41c5a2
merge unsigned compare guards with constant indexes or limits
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
14021
diff
changeset
|
174 } |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
175 |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
176 /** |
18490
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
177 * Checks whether this {@link ValueNode} represents a {@linkplain Stamp#isLegal() legal} pointer |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
178 * value which is known to be always null. |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
179 * |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
180 * @param node the node to check |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
181 * @return true if this node represents a legal object value which is known to be always null |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
182 */ |
18490
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
183 public static boolean isPointerAlwaysNull(ValueNode node) { |
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
184 return isPointerAlwaysNull(node.stamp()); |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
185 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
186 |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
187 /** |
18490
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
188 * Checks whether this {@link Stamp} represents a {@linkplain Stamp#isLegal() legal} pointer |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
189 * stamp whose values are known to be always null. |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
190 * |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
191 * @param stamp the stamp to check |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
192 * @return true if this stamp represents a legal object stamp whose values are known to be |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
193 * always null |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
194 */ |
18490
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
195 public static boolean isPointerAlwaysNull(Stamp stamp) { |
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
196 if (stamp instanceof AbstractPointerStamp && stamp.isLegal()) { |
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
197 return ((AbstractPointerStamp) stamp).alwaysNull(); |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
198 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
199 return false; |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
200 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
201 |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
202 /** |
18490
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
203 * Checks whether this {@link ValueNode} represents a {@linkplain Stamp#isLegal() legal} pointer |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
204 * value which is known to never be null. |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
205 * |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
206 * @param node the node to check |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
207 * @return true if this node represents a legal object value which is known to never be null |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
208 */ |
18490
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
209 public static boolean isPointerNonNull(ValueNode node) { |
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
210 return isPointerNonNull(node.stamp()); |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
211 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
212 |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
213 /** |
18490
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
214 * Checks whether this {@link Stamp} represents a {@linkplain Stamp#isLegal() legal} pointer |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
215 * stamp whose values known to be always null. |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
216 * |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
217 * @param stamp the stamp to check |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
218 * @return true if this stamp represents a legal object stamp whose values are known to be |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
219 * always null |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
220 */ |
18490
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
221 public static boolean isPointerNonNull(Stamp stamp) { |
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
222 if (stamp instanceof AbstractPointerStamp && stamp.isLegal()) { |
ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
18364
diff
changeset
|
223 return ((AbstractPointerStamp) stamp).nonNull(); |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
224 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
225 return false; |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
226 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
227 |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
228 /** |
15380
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
229 * Returns the {@linkplain ResolvedJavaType Java type} this {@linkplain ValueNode} has if it is |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
230 * a {@linkplain Stamp#isLegal() legal} Object value. |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
231 * |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
232 * @param node the node to check |
15380
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
233 * @return the Java type this value has if it is a legal Object type, null otherwise |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
234 */ |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
235 public static ResolvedJavaType typeOrNull(ValueNode node) { |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
236 return typeOrNull(node.stamp()); |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
237 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
238 |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
239 /** |
15380
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
240 * Returns the {@linkplain ResolvedJavaType Java type} this {@linkplain Stamp} has if it is a |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
241 * {@linkplain Stamp#isLegal() legal} Object stamp. |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
242 * |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
243 * @param stamp the stamp to check |
15380
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
244 * @return the Java type this stamp has if it is a legal Object stamp, null otherwise |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
245 */ |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
246 public static ResolvedJavaType typeOrNull(Stamp stamp) { |
16003
83433cf49019
Fix incorrect null check in oop compression.
Roland Schatz <roland.schatz@oracle.com>
parents:
15791
diff
changeset
|
247 if (stamp instanceof AbstractObjectStamp && stamp.isLegal()) { |
83433cf49019
Fix incorrect null check in oop compression.
Roland Schatz <roland.schatz@oracle.com>
parents:
15791
diff
changeset
|
248 return ((AbstractObjectStamp) stamp).type(); |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
249 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
250 return null; |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
251 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
252 |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
253 /** |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
254 * Checks whether this {@link ValueNode} represents a {@linkplain Stamp#isLegal() legal} Object |
15380
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
255 * value whose Java type is known exactly. If this method returns true then the |
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
256 * {@linkplain ResolvedJavaType Java type} returned by {@link #typeOrNull(ValueNode)} is the |
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
257 * concrete dynamic/runtime Java type of this value. |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
258 * |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
259 * @param node the node to check |
15380
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
260 * @return true if this node represents a legal object value whose Java type is known exactly |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
261 */ |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
262 public static boolean isExactType(ValueNode node) { |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
263 return isExactType(node.stamp()); |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
264 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
265 |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
266 /** |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
267 * Checks whether this {@link Stamp} represents a {@linkplain Stamp#isLegal() legal} Object |
15380
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
268 * stamp whose {@linkplain ResolvedJavaType Java type} is known exactly. If this method returns |
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
269 * true then the Java type returned by {@link #typeOrNull(Stamp)} is the only concrete |
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
270 * dynamic/runtime Java type possible for values of this stamp. |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
271 * |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
272 * @param stamp the stamp to check |
15380
10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
15260
diff
changeset
|
273 * @return true if this node represents a legal object stamp whose Java type is known exactly |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
274 */ |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
275 public static boolean isExactType(Stamp stamp) { |
16003
83433cf49019
Fix incorrect null check in oop compression.
Roland Schatz <roland.schatz@oracle.com>
parents:
15791
diff
changeset
|
276 if (stamp instanceof AbstractObjectStamp && stamp.isLegal()) { |
83433cf49019
Fix incorrect null check in oop compression.
Roland Schatz <roland.schatz@oracle.com>
parents:
15791
diff
changeset
|
277 return ((AbstractObjectStamp) stamp).isExactType(); |
15260
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
278 } |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
279 return false; |
61363577a184
Move static helpers from ObjectStamp to StampTool.
Josef Eisl <josef.eisl@jku.at>
parents:
15198
diff
changeset
|
280 } |
5657
d71eb56d6bb0
new stamp inference in CanonicalizerPhase, IntegerStamp.mask
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff
changeset
|
281 } |