1 /*
   2  * Copyright (c) 1999, 2015, 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(KlassHandle h_k) : ciKlass(h_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 }