Mercurial > hg > truffle
annotate src/share/vm/shark/sharkConstant.cpp @ 14714:b602356a9cfc
additional canonicalizers for accesses and value nodes (improves number of implicit null checks)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 20 Mar 2014 17:15:36 +0100 |
parents | de6a9e811145 |
children | 4ca6dc0799b6 |
rev | line source |
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1692 | 1 /* |
14223
de6a9e811145
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
mikael
parents:
7601
diff
changeset
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2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
1692 | 3 * Copyright 2009 Red Hat, Inc. |
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
7 * under the terms of the GNU General Public License version 2 only, as | |
8 * published by the Free Software Foundation. | |
9 * | |
10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 * version 2 for more details (a copy is included in the LICENSE file that | |
14 * accompanied this code). | |
15 * | |
16 * You should have received a copy of the GNU General Public License version | |
17 * 2 along with this work; if not, write to the Free Software Foundation, | |
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 * | |
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
21 * or visit www.oracle.com if you need additional information or have any | |
22 * questions. | |
23 * | |
24 */ | |
25 | |
1972 | 26 #include "precompiled.hpp" |
27 #include "ci/ciInstance.hpp" | |
28 #include "ci/ciStreams.hpp" | |
29 #include "shark/sharkBuilder.hpp" | |
30 #include "shark/sharkConstant.hpp" | |
31 #include "shark/sharkValue.hpp" | |
1692 | 32 |
33 using namespace llvm; | |
34 | |
35 SharkConstant* SharkConstant::for_ldc(ciBytecodeStream *iter) { | |
36 ciConstant constant = iter->get_constant(); | |
37 ciType *type = NULL; | |
38 if (constant.basic_type() == T_OBJECT) { | |
39 ciEnv *env = ciEnv::current(); | |
7601 | 40 |
41 assert(constant.as_object()->klass() == env->String_klass() | |
42 || constant.as_object()->klass() == env->Class_klass() | |
43 || constant.as_object()->klass()->is_subtype_of(env->MethodType_klass()) | |
44 || constant.as_object()->klass()->is_subtype_of(env->MethodHandle_klass()), "should be"); | |
45 | |
7195 | 46 type = constant.as_object()->klass(); |
1692 | 47 } |
48 return new SharkConstant(constant, type); | |
49 } | |
50 | |
51 SharkConstant* SharkConstant::for_field(ciBytecodeStream *iter) { | |
52 bool will_link; | |
53 ciField *field = iter->get_field(will_link); | |
54 assert(will_link, "typeflow responsibility"); | |
55 | |
56 return new SharkConstant(field->constant_value(), field->type()); | |
57 } | |
58 | |
59 SharkConstant::SharkConstant(ciConstant constant, ciType *type) { | |
60 SharkValue *value = NULL; | |
61 | |
62 switch (constant.basic_type()) { | |
63 case T_BOOLEAN: | |
64 case T_BYTE: | |
65 case T_CHAR: | |
66 case T_SHORT: | |
67 case T_INT: | |
68 value = SharkValue::jint_constant(constant.as_int()); | |
69 break; | |
70 | |
71 case T_LONG: | |
72 value = SharkValue::jlong_constant(constant.as_long()); | |
73 break; | |
74 | |
75 case T_FLOAT: | |
76 value = SharkValue::jfloat_constant(constant.as_float()); | |
77 break; | |
78 | |
79 case T_DOUBLE: | |
80 value = SharkValue::jdouble_constant(constant.as_double()); | |
81 break; | |
82 | |
83 case T_OBJECT: | |
84 case T_ARRAY: | |
85 break; | |
86 | |
87 case T_ILLEGAL: | |
88 // out of memory | |
89 _is_loaded = false; | |
90 return; | |
91 | |
92 default: | |
93 tty->print_cr("Unhandled type %s", type2name(constant.basic_type())); | |
94 ShouldNotReachHere(); | |
95 } | |
96 | |
97 // Handle primitive types. We create SharkValues for these | |
98 // now; doing so doesn't emit any code, and it allows us to | |
99 // delegate a bunch of stuff to the SharkValue code. | |
100 if (value) { | |
101 _value = value; | |
102 _is_loaded = true; | |
103 _is_nonzero = value->zero_checked(); | |
104 _is_two_word = value->is_two_word(); | |
105 return; | |
106 } | |
107 | |
108 // Handle reference types. This is tricky because some | |
109 // ciObjects are psuedo-objects that refer to oops which | |
110 // have yet to be created. We need to spot the unloaded | |
111 // objects (which differ between ldc* and get*, thanks!) | |
112 ciObject *object = constant.as_object(); | |
113 assert(type != NULL, "shouldn't be"); | |
7195 | 114 |
115 if ((! object->is_null_object()) && object->klass() == ciEnv::current()->Class_klass()) { | |
116 ciKlass *klass = object->klass(); | |
117 if (! klass->is_loaded()) { | |
1692 | 118 _is_loaded = false; |
119 return; | |
120 } | |
121 } | |
7195 | 122 |
123 if (object->is_null_object() || ! object->can_be_constant() || ! object->is_loaded()) { | |
1692 | 124 _is_loaded = false; |
125 return; | |
126 } | |
127 | |
128 _value = NULL; | |
129 _object = object; | |
130 _type = type; | |
131 _is_loaded = true; | |
132 _is_nonzero = true; | |
133 _is_two_word = false; | |
134 } |