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products/sources/formale Sprachen/Java/Openjdk/src/hotspot/share/ci/ (Sun/Oracle ^©) Datei vom 13.11.2022 mit Größe 3 kB

Quelle ciArrayKlass.cpp Sprache: C

/*
* Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/

#include "precompiled.hpp"
#include "ci/ciArrayKlass.hpp"
#include "ci/ciObjArrayKlass.hpp"
#include "ci/ciTypeArrayKlass.hpp"
#include "ci/ciUtilities.hpp"

// ciArrayKlass
//
// This class represents a Klass* in the HotSpot virtual machine
// whose Klass part in an ArrayKlass.

// ------------------------------------------------------------------
// ciArrayKlass::ciArrayKlass
//
// Loaded array klass.
ciArrayKlass::ciArrayKlass(Klass* k) : ciKlass(k) {
  assert(get_Klass()->is_array_klass(), "wrong type");
  _dimension = get_ArrayKlass()->dimension();
}

// ------------------------------------------------------------------
// ciArrayKlass::ciArrayKlass
//
// Unloaded array klass.
ciArrayKlass::ciArrayKlass(ciSymbol* name, int dimension, BasicType bt)
  : ciKlass(name, bt) {
  _dimension = dimension;
}

// ------------------------------------------------------------------
// ciArrayKlass::element_type
//
// What type is obtained when this array is indexed once?
ciType* ciArrayKlass::element_type() {
  if (is_type_array_klass()) {
    return ciType::make(as_type_array_klass()->element_type());
  } else {
    return as_obj_array_klass()->element_klass()->as_klass();
  }
}

// ------------------------------------------------------------------
// ciArrayKlass::base_element_type
//
// What type is obtained when this array is indexed as many times as possible?
ciType* ciArrayKlass::base_element_type() {
  if (is_type_array_klass()) {
    return ciType::make(as_type_array_klass()->element_type());
  } else {
    ciKlass* ek = as_obj_array_klass()->base_element_klass();
    if (ek->is_type_array_klass()) {
      return ciType::make(ek->as_type_array_klass()->element_type());
    }
    return ek;
  }
}

// ------------------------------------------------------------------
// ciArrayKlass::is_leaf_type
bool ciArrayKlass::is_leaf_type() {
  if (is_type_array_klass()) {
    return true;
  } else {
    return as_obj_array_klass()->base_element_klass()->is_leaf_type();
  }
}

// ------------------------------------------------------------------
// ciArrayKlass::base_element_type
//
// What type is obtained when this array is indexed as many times as possible?
ciArrayKlass* ciArrayKlass::make(ciType* element_type) {
  if (element_type->is_primitive_type()) {
    return ciTypeArrayKlass::make(element_type->basic_type());
  } else {
    return ciObjArrayKlass::make(element_type->as_klass());
  }
}

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