Mercurial > hg > graal-jvmci-8

comparison src/share/vm/shark/sharkConstant.cpp @ 1692:d2ede61b7a12

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6976186: integrate Shark HotSpot changes Summary: Shark is a JIT compiler for Zero that uses the LLVM compiler infrastructure. Reviewed-by: kvn, twisti Contributed-by: Gary Benson <gbenson@redhat.com>
author twisti
date Wed, 11 Aug 2010 05:51:21 -0700
parents
children f95d63e2154a
comparison
equal deleted inserted replaced
1691:4a665be40fd3 1692:d2ede61b7a12
1 /*
2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
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
26 #include "incls/_precompiled.incl"
27 #include "incls/_sharkConstant.cpp.incl"
28
29 using namespace llvm;
30
31 SharkConstant* SharkConstant::for_ldc(ciBytecodeStream *iter) {
32 ciConstant constant = iter->get_constant();
33 ciType *type = NULL;
34 if (constant.basic_type() == T_OBJECT) {
35 ciEnv *env = ciEnv::current();
36 if (constant.as_object()->is_klass())
37 type = env->Class_klass();
38 else
39 type = env->String_klass();
40 }
41 return new SharkConstant(constant, type);
42 }
43
44 SharkConstant* SharkConstant::for_field(ciBytecodeStream *iter) {
45 bool will_link;
46 ciField *field = iter->get_field(will_link);
47 assert(will_link, "typeflow responsibility");
48
49 return new SharkConstant(field->constant_value(), field->type());
50 }
51
52 SharkConstant::SharkConstant(ciConstant constant, ciType *type) {
53 SharkValue *value = NULL;
54
55 switch (constant.basic_type()) {
56 case T_BOOLEAN:
57 case T_BYTE:
58 case T_CHAR:
59 case T_SHORT:
60 case T_INT:
61 value = SharkValue::jint_constant(constant.as_int());
62 break;
63
64 case T_LONG:
65 value = SharkValue::jlong_constant(constant.as_long());
66 break;
67
68 case T_FLOAT:
69 value = SharkValue::jfloat_constant(constant.as_float());
70 break;
71
72 case T_DOUBLE:
73 value = SharkValue::jdouble_constant(constant.as_double());
74 break;
75
76 case T_OBJECT:
77 case T_ARRAY:
78 break;
79
80 case T_ILLEGAL:
81 // out of memory
82 _is_loaded = false;
83 return;
84
85 default:
86 tty->print_cr("Unhandled type %s", type2name(constant.basic_type()));
87 ShouldNotReachHere();
88 }
89
90 // Handle primitive types. We create SharkValues for these
91 // now; doing so doesn't emit any code, and it allows us to
92 // delegate a bunch of stuff to the SharkValue code.
93 if (value) {
94 _value = value;
95 _is_loaded = true;
96 _is_nonzero = value->zero_checked();
97 _is_two_word = value->is_two_word();
98 return;
99 }
100
101 // Handle reference types. This is tricky because some
102 // ciObjects are psuedo-objects that refer to oops which
103 // have yet to be created. We need to spot the unloaded
104 // objects (which differ between ldc* and get*, thanks!)
105 ciObject *object = constant.as_object();
106 assert(type != NULL, "shouldn't be");
107 if (object->is_klass()) {
108 // The constant returned for a klass is the ciKlass
109 // for the entry, but we want the java_mirror.
110 ciKlass *klass = object->as_klass();
111 if (!klass->is_loaded()) {
112 _is_loaded = false;
113 return;
114 }
115 object = klass->java_mirror();
116 }
117 if (object->is_null_object() || !object->can_be_constant()) {
118 _is_loaded = false;
119 return;
120 }
121
122 _value = NULL;
123 _object = object;
124 _type = type;
125 _is_loaded = true;
126 _is_nonzero = true;
127 _is_two_word = false;
128 }