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 #include "ci/ciValueArrayKlass.hpp"
  31 
  32 // ciArrayKlass
  33 //
  34 // This class represents a Klass* in the HotSpot virtual machine
  35 // whose Klass part in an ArrayKlass.
  36 
  37 // ------------------------------------------------------------------
  38 // ciArrayKlass::ciArrayKlass
  39 //
  40 // Loaded array klass.
  41 ciArrayKlass::ciArrayKlass(KlassHandle h_k) : ciKlass(h_k) {
  42   assert(get_Klass()->is_array_klass(), "wrong type");
  43   _dimension = get_ArrayKlass()->dimension();
  44 }
  45 
  46 // ------------------------------------------------------------------
  47 // ciArrayKlass::ciArrayKlass
  48 //
  49 // Unloaded array klass.
  50 ciArrayKlass::ciArrayKlass(ciSymbol* name, int dimension, BasicType bt)
  51   : ciKlass(name, bt) {
  52   _dimension = dimension;
  53 }
  54 
  55 // ------------------------------------------------------------------
  56 // ciArrayKlass::element_type
  57 //
  58 // What type is obtained when this array is indexed once?
  59 ciType* ciArrayKlass::element_type() {
  60   if (is_type_array_klass()) {
  61     return ciType::make(as_type_array_klass()->element_type());
  62   } else {
  63     return element_klass()->as_klass();
  64   }
  65 }
  66 
  67 
  68 // ------------------------------------------------------------------
  69 // ciArrayKlass::base_element_type
  70 //
  71 // What type is obtained when this array is indexed as many times as possible?
  72 ciType* ciArrayKlass::base_element_type() {
  73   if (is_type_array_klass()) {
  74     return ciType::make(as_type_array_klass()->element_type());
  75   } else {
  76     ciKlass* ek = as_obj_array_klass()->base_element_klass();
  77     if (ek->is_type_array_klass()) {
  78       return ciType::make(ek->as_type_array_klass()->element_type());
  79     }
  80     return ek;
  81   }
  82 }
  83 
  84 
  85 // ------------------------------------------------------------------
  86 // ciArrayKlass::is_leaf_type
  87 bool ciArrayKlass::is_leaf_type() {
  88   if (is_type_array_klass()) {
  89     return true;
  90   } else {
  91     return as_obj_array_klass()->base_element_klass()->is_leaf_type();
  92   }
  93 }
  94 
  95 
  96 // ------------------------------------------------------------------
  97 // ciArrayKlass::base_element_type
  98 //
  99 // What type is obtained when this array is indexed as many times as possible?
 100 ciArrayKlass* ciArrayKlass::make(ciType* element_type) {
 101   if (element_type->is_primitive_type()) {
 102     return ciTypeArrayKlass::make(element_type->basic_type());
 103   } else if (element_type->is_valuetype() && element_type->as_value_klass()->flatten_array()) {
 104     return ciValueArrayKlass::make(element_type->as_klass());
 105   } else {
 106     return ciObjArrayKlass::make(element_type->as_klass());
 107   }
 108 }