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/*
* Copyright (c) 2000, 2010, 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.
*
*/
#ifndef SHARE_VM_CI_CITYPE_HPP
#define SHARE_VM_CI_CITYPE_HPP
#include "ci/ciObject.hpp"
#include "oops/klassOop.hpp"
// 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);
};
#endif // SHARE_VM_CI_CITYPE_HPP
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