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comparison src/share/vm/ci/ciField.cpp @ 1138:dd57230ba8fe

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6893268: additional dynamic language related optimizations in C2 Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance. Reviewed-by: kvn, never
author twisti
date Tue, 05 Jan 2010 15:21:25 +0100
parents a61af66fc99e
children 4ce7240d622c
comparison
equal deleted inserted replaced
1137:97125851f396 1138:dd57230ba8fe
1 /* 1 /*
2 * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved. 2 * Copyright 1999-2009 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
84 // field. 84 // field.
85 if (field_type == T_OBJECT || field_type == T_ARRAY) { 85 if (field_type == T_OBJECT || field_type == T_ARRAY) {
86 bool ignore; 86 bool ignore;
87 // This is not really a class reference; the index always refers to the 87 // This is not really a class reference; the index always refers to the
88 // field's type signature, as a symbol. Linkage checks do not apply. 88 // field's type signature, as a symbol. Linkage checks do not apply.
89 _type = ciEnv::current(thread)->get_klass_by_index(klass, sig_index, ignore); 89 _type = ciEnv::current(thread)->get_klass_by_index(cpool, sig_index, ignore, klass);
90 } else { 90 } else {
91 _type = ciType::make(field_type); 91 _type = ciType::make(field_type);
92 } 92 }
93 93
94 _name = (ciSymbol*)ciEnv::current(thread)->get_object(name()); 94 _name = (ciSymbol*)ciEnv::current(thread)->get_object(name());
98 // Note: we actually create a ciInstanceKlass for this klass, 98 // Note: we actually create a ciInstanceKlass for this klass,
99 // even though we may not need to. 99 // even though we may not need to.
100 int holder_index = cpool->klass_ref_index_at(index); 100 int holder_index = cpool->klass_ref_index_at(index);
101 bool holder_is_accessible; 101 bool holder_is_accessible;
102 ciInstanceKlass* declared_holder = 102 ciInstanceKlass* declared_holder =
103 ciEnv::current(thread)->get_klass_by_index(klass, holder_index, 103 ciEnv::current(thread)->get_klass_by_index(cpool, holder_index,
104 holder_is_accessible) 104 holder_is_accessible,
105 ->as_instance_klass(); 105 klass)->as_instance_klass();
106 106
107 // The declared holder of this field may not have been loaded. 107 // The declared holder of this field may not have been loaded.
108 // Bail out with partial field information. 108 // Bail out with partial field information.
109 if (!holder_is_accessible) { 109 if (!holder_is_accessible) {
110 // _cp_index and _type have already been set. 110 // _cp_index and _type have already been set.
166 _flags = ciFlags(fd->access_flags()); 166 _flags = ciFlags(fd->access_flags());
167 _offset = fd->offset(); 167 _offset = fd->offset();
168 _holder = CURRENT_ENV->get_object(fd->field_holder())->as_instance_klass(); 168 _holder = CURRENT_ENV->get_object(fd->field_holder())->as_instance_klass();
169 169
170 // Check to see if the field is constant. 170 // Check to see if the field is constant.
171 if (_holder->is_initialized() && 171 if (_holder->is_initialized() && this->is_final()) {
172 this->is_final() && this->is_static()) { 172 if (!this->is_static()) {
173 // A field can be constant if it's a final static field or if it's
174 // a final non-static field of a trusted class ({java,sun}.dyn).
175 if (_holder->is_in_package("java/dyn") || _holder->is_in_package("sun/dyn")) {
176 _is_constant = true;
177 return;
178 }
179 _is_constant = false;
180 return;
181 }
182
173 // This field just may be constant. The only cases where it will 183 // This field just may be constant. The only cases where it will
174 // not be constant are: 184 // not be constant are:
175 // 185 //
176 // 1. The field holds a non-perm-space oop. The field is, strictly 186 // 1. The field holds a non-perm-space oop. The field is, strictly
177 // speaking, constant but we cannot embed non-perm-space oops into 187 // speaking, constant but we cannot embed non-perm-space oops into