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 class SharkConstant : public ResourceObj {
  27  public:
  28   static SharkConstant* for_ldc(ciBytecodeStream* iter);
  29   static SharkConstant* for_field(ciBytecodeStream* iter);
  30 
  31  private:
  32   SharkConstant(ciConstant constant, ciType* type);
  33 
  34  private:
  35   SharkValue* _value;
  36   ciObject*   _object;
  37   ciType*     _type;
  38   bool        _is_loaded;
  39   bool        _is_nonzero;
  40   bool        _is_two_word;
  41 
  42  public:
  43   bool is_loaded() const {
  44     return _is_loaded;
  45   }
  46   bool is_nonzero() const {
  47     assert(is_loaded(), "should be");
  48     return _is_nonzero;
  49   }
  50   bool is_two_word() const {
  51     assert(is_loaded(), "should be");
  52     return _is_two_word;
  53   }
  54 
  55  public:
  56   SharkValue* value(SharkBuilder* builder) {
  57     assert(is_loaded(), "should be");
  58     if (_value == NULL) {
  59       _value = SharkValue::create_generic(
  60         _type, builder->CreateInlineOop(_object), _is_nonzero);
  61     }
  62     return _value;
  63   }
  64 };