Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright 2000-2001 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

  * CA 95054 USA or visit www.sun.com if you need additional information or

  * have any questions.

  *

  */

 // ciType

 //

 // This class represents either a class (T_OBJECT), array (T_ARRAY),

 // or one of the primitive types such as T_INT.

 class ciType : public ciObject {

   CI_PACKAGE_ACCESS

   friend class ciKlass;

   friend class ciReturnAddress;

 private:

   BasicType _basic_type;

   ciType(BasicType t);     // for the primitive types only

   ciType(KlassHandle k);   // for subclasses (reference types)

   ciType(ciKlass* klass);  // for unloaded types

   const char* type_string() { return "ciType"; }

   void print_impl(outputStream* st);

   // Distinguished instances of primitive ciTypes..

   static ciType* _basic_types[T_CONFLICT+1];

 public:

   BasicType basic_type() const              { return _basic_type; }

   // Returns true iff the types are identical, or if both are klasses

   // and the is_subtype_of relation holds between the klasses.

   bool is_subtype_of(ciType* type);

   // Get the instance of java.lang.Class corresponding to this type.

   // There are mirrors for instance, array, and primitive types (incl. void).

   virtual ciInstance*    java_mirror();

   // Get the class which "boxes" (or "wraps") values of this type.

   // Example:  short is boxed by java.lang.Short, etc.

   // Returns self if it is a reference type.

   // Returns NULL for void, since null is used in such cases.

   ciKlass*  box_klass();

   // Returns true if this is not a klass or array (i.e., not a reference type).

   bool is_primitive_type() const            { return basic_type() != T_OBJECT && basic_type() != T_ARRAY; }

   int size() const                          { return type2size[basic_type()]; }

   bool is_void() const                      { return basic_type() == T_VOID; }

   bool is_one_word() const                  { return size() == 1; }

   bool is_two_word() const                  { return size() == 2; }

   // What kind of ciObject is this?

   bool is_type()                            { return true; }

   bool is_classless() const                 { return is_primitive_type(); }

   virtual void print_name_on(outputStream* st);

   void print_name() {

     print_name_on(tty);

   }

   static ciType* make(BasicType t);

 };

 // ciReturnAddress

 //

 // This class represents the type of a specific return address in the

 // bytecodes.

 class ciReturnAddress : public ciType {

   CI_PACKAGE_ACCESS

 private:

   // The bci of this return address.

   int _bci;

   ciReturnAddress(int bci);

   const char* type_string() { return "ciReturnAddress"; }

   void print_impl(outputStream* st);

 public:

   bool is_return_address()  { return true; }

   int  bci() { return _bci; }

   static ciReturnAddress* make(int bci);

 };