1 /*

     2  * Copyright (c) 1999, 2010, 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 #ifndef SHARE_VM_SHARK_SHARKCONSTANT_HPP

    27 #define SHARE_VM_SHARK_SHARKCONSTANT_HPP

    28 

    29 #include "ci/ciStreams.hpp"

    30 #include "memory/allocation.hpp"

    31 #include "shark/sharkBuilder.hpp"

    32 #include "shark/sharkValue.hpp"

    33 

    34 class SharkConstant : public ResourceObj {

    35  public:

    36   static SharkConstant* for_ldc(ciBytecodeStream* iter);

    37   static SharkConstant* for_field(ciBytecodeStream* iter);

    38 

    39  private:

    40   SharkConstant(ciConstant constant, ciType* type);

    41 

    42  private:

    43   SharkValue* _value;

    44   ciObject*   _object;

    45   ciType*     _type;

    46   bool        _is_loaded;

    47   bool        _is_nonzero;

    48   bool        _is_two_word;

    49 

    50  public:

    51   bool is_loaded() const {

    52     return _is_loaded;

    53   }

    54   bool is_nonzero() const {

    55     assert(is_loaded(), "should be");

    56     return _is_nonzero;

    57   }

    58   bool is_two_word() const {

    59     assert(is_loaded(), "should be");

    60     return _is_two_word;

    61   }

    62 

    63  public:

    64   SharkValue* value(SharkBuilder* builder) {

    65     assert(is_loaded(), "should be");

    66     if (_value == NULL) {

    67       _value = SharkValue::create_generic(

    68         _type, builder->CreateInlineOop(_object), _is_nonzero);

    69     }

    70     return _value;

    71   }

    72 };

    73 

    74 #endif // SHARE_VM_SHARK_SHARKCONSTANT_HPP