1 /*
  2  * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
  3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  4  *
  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
  7  * published by the Free Software Foundation.
  8  *
  9  * This code is distributed in the hope that it will be useful, but WITHOUT
 10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 12  * version 2 for more details (a copy is included in the LICENSE file that
 13  * accompanied this code).
 14  *
 15  * You should have received a copy of the GNU General Public License version
 16  * 2 along with this work; if not, write to the Free Software Foundation,
 17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  *
 23  */
 24 
 25 #include "precompiled.hpp"
 26 #include "ci/ciArrayKlass.hpp"
 27 #include "ci/ciObjArrayKlass.hpp"
 28 #include "ci/ciTypeArrayKlass.hpp"
 29 #include "ci/ciUtilities.hpp"
 30 
 31 // ciArrayKlass
 32 //
 33 // This class represents a Klass* in the HotSpot virtual machine
 34 // whose Klass part in an ArrayKlass.
 35 
 36 // ------------------------------------------------------------------
 37 // ciArrayKlass::ciArrayKlass
 38 //
 39 // Loaded array klass.
 40 ciArrayKlass::ciArrayKlass(Klass* k) : ciKlass(k) {
 41   assert(get_Klass()->is_array_klass(), "wrong type");
 42   _dimension = get_ArrayKlass()->dimension();
 43 }
 44 
 45 // ------------------------------------------------------------------
 46 // ciArrayKlass::ciArrayKlass
 47 //
 48 // Unloaded array klass.
 49 ciArrayKlass::ciArrayKlass(ciSymbol* name, int dimension, BasicType bt)
 50   : ciKlass(name, bt) {
 51   _dimension = dimension;
 52 }
 53 
 54 // ------------------------------------------------------------------
 55 // ciArrayKlass::element_type
 56 //
 57 // What type is obtained when this array is indexed once?
 58 ciType* ciArrayKlass::element_type() {
 59   if (is_type_array_klass()) {
 60     return ciType::make(as_type_array_klass()->element_type());
 61   } else {
 62     return as_obj_array_klass()->element_klass()->as_klass();
 63   }
 64 }
 65 
 66 
 67 // ------------------------------------------------------------------
 68 // ciArrayKlass::base_element_type
 69 //
 70 // What type is obtained when this array is indexed as many times as possible?
 71 ciType* ciArrayKlass::base_element_type() {
 72   if (is_type_array_klass()) {
 73     return ciType::make(as_type_array_klass()->element_type());
 74   } else {
 75     ciKlass* ek = as_obj_array_klass()->base_element_klass();
 76     if (ek->is_type_array_klass()) {
 77       return ciType::make(ek->as_type_array_klass()->element_type());
 78     }
 79     return ek;
 80   }
 81 }
 82 
 83 
 84 // ------------------------------------------------------------------
 85 // ciArrayKlass::is_leaf_type
 86 bool ciArrayKlass::is_leaf_type() {
 87   if (is_type_array_klass()) {
 88     return true;
 89   } else {
 90     return as_obj_array_klass()->base_element_klass()->is_leaf_type();
 91   }
 92 }
 93 
 94 
 95 // ------------------------------------------------------------------
 96 // ciArrayKlass::base_element_type
 97 //
 98 // What type is obtained when this array is indexed as many times as possible?
 99 ciArrayKlass* ciArrayKlass::make(ciType* element_type) {
100   if (element_type->is_primitive_type()) {
101     return ciTypeArrayKlass::make(element_type->basic_type());
102   } else {
103     return ciObjArrayKlass::make(element_type->as_klass());
104   }
105 }