text: /*
   * Copyright (c) 2000, 2021, 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/ciEnv.hpp"
  #include "ci/ciType.hpp"
  #include "ci/ciUtilities.inline.hpp"
  #include "memory/resourceArea.hpp"
  #include "memory/universe.hpp"
  #include "oops/oop.inline.hpp"
  
  ciType* ciType::_basic_types[T_CONFLICT+1];
  
  // ciType
  //
  // This class represents a Java reference or primitive type.
  
  // ------------------------------------------------------------------
  // ciType::ciType
  //
  ciType::ciType(BasicType basic_type) : ciMetadata() {
    assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check");
    _basic_type = basic_type;
  }
  
  ciType::ciType(Klass* k) : ciMetadata(k) {
    _basic_type = k->is_array_klass() ? T_ARRAY : T_OBJECT;
  }
  
  
  // ------------------------------------------------------------------
  // ciType::is_subtype_of
  //
  bool ciType::is_subtype_of(ciType* type) {
    if (this == type)  return true;
    if (is_klass() && type->is_klass())
      return this->as_klass()->is_subtype_of(type->as_klass());
    return false;
  }
  
  // ------------------------------------------------------------------
  // ciType::name
  //
  // Return the name of this type
  const char* ciType::name() {
    if (is_primitive_type()) {
      return type2name(basic_type());
    } else {
      assert(is_klass(), "must be");
      return as_klass()->name()->as_utf8();
    }
  }
  
  // ------------------------------------------------------------------
  // ciType::print_impl
  //
  // Implementation of the print method.
  void ciType::print_impl(outputStream* st) {
    st->print(" type=");
    print_name_on(st);
  }
  
  // ------------------------------------------------------------------
  // ciType::print_name
  //
  // Print the name of this type
  void ciType::print_name_on(outputStream* st) {
    ResourceMark rm;
    st->print("%s", name());
  }
  
  
  
  // ------------------------------------------------------------------
  // ciType::java_mirror
  //
  ciInstance* ciType::java_mirror() {
    VM_ENTRY_MARK;
    return CURRENT_THREAD_ENV->get_instance(Universe::java_mirror(basic_type()));
  }
  
  // ------------------------------------------------------------------
  // ciType::make
  //
  // Produce the ciType for a given primitive BasicType.
  // As a bonus, produce the right reference type for T_OBJECT.
  // Does not work on T_ARRAY.
  ciType* ciType::make(BasicType t) {
    // short, etc.
    // Note: Bare T_ADDRESS means a raw pointer type, not a return_address.
    assert((uint)t < T_CONFLICT+1, "range check");
    if (t == T_OBJECT)  return ciEnv::_Object_klass;  // java/lang/Object
    assert(_basic_types[t] != NULL, "domain check");
    return _basic_types[t];
  }
  
  // ciReturnAddress
  //
  // This class represents the type of a specific return address in the
  // bytecodes.
  
  // ------------------------------------------------------------------
  // ciReturnAddress::ciReturnAddress
  //
  ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) {
    assert(0 <= bci, "bci cannot be negative");
    _bci = bci;
  }
  
  // ------------------------------------------------------------------
  // ciReturnAddress::print_impl
  //
  // Implementation of the print method.
  void ciReturnAddress::print_impl(outputStream* st) {
    st->print(" bci=%d", _bci);
  }
  
  // ------------------------------------------------------------------
  // ciReturnAddress::make
  ciReturnAddress* ciReturnAddress::make(int bci) {
    GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);)
  }
  