hotspot/src/share/vm/ci/ciArray.hpp
author vlivanov
Tue, 10 Sep 2013 14:51:48 -0700
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8001107: @Stable annotation for constant folding of lazily evaluated variables Reviewed-by: rbackman, twisti, kvn Contributed-by: john.r.rose@oracle.com, vladimir.x.ivanov@oracle.com
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/*
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 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_CI_CIARRAY_HPP
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#define SHARE_VM_CI_CIARRAY_HPP
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#include "ci/ciArrayKlass.hpp"
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#include "ci/ciConstant.hpp"
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#include "ci/ciObject.hpp"
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#include "oops/arrayOop.hpp"
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#include "oops/objArrayOop.hpp"
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#include "oops/typeArrayOop.hpp"
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// ciArray
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//
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// This class represents an arrayOop in the HotSpot virtual
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// machine.
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class ciArray : public ciObject {
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private:
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  int _length;
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protected:
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  ciArray(    arrayHandle h_a) : ciObject(h_a), _length(h_a()->length()) {}
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  ciArray( objArrayHandle h_a) : ciObject(h_a), _length(h_a()->length()) {}
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  ciArray(typeArrayHandle h_a) : ciObject(h_a), _length(h_a()->length()) {}
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  ciArray(ciKlass* klass, int len) : ciObject(klass), _length(len) {}
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  arrayOop get_arrayOop() const { return (arrayOop)get_oop(); }
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  const char* type_string() { return "ciArray"; }
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  void print_impl(outputStream* st);
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  ciConstant element_value_impl(BasicType elembt, arrayOop ary, int index);
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public:
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  int length() { return _length; }
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  // Convenience routines.
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  ciArrayKlass* array_type()         { return klass()->as_array_klass(); }
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  ciType*       element_type()       { return array_type()->element_type(); }
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  BasicType     element_basic_type() { return element_type()->basic_type(); }
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  // Current value of an element.
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  // Returns T_ILLEGAL if there is no element at the given index.
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  ciConstant element_value(int index);
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  // Current value of an element at the specified offset.
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  // Returns T_ILLEGAL if there is no element at the given offset.
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  ciConstant element_value_by_offset(intptr_t element_offset);
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  // What kind of ciObject is this?
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  bool is_array()        { return true; }
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  bool is_java_object()  { return true; }
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};
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#endif // SHARE_VM_CI_CIARRAY_HPP