duke@435: /*
coleenp@4037:  * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
coleenp@4037: #include "ci/ciEnv.hpp"
stefank@2314: #include "ci/ciType.hpp"
stefank@2314: #include "ci/ciUtilities.hpp"
stefank@2314: #include "classfile/systemDictionary.hpp"
stefank@2314: #include "oops/oop.inline.hpp"
duke@435: 
duke@435: ciType* ciType::_basic_types[T_CONFLICT+1];
duke@435: 
duke@435: // ciType
duke@435: //
duke@435: // This class represents either a class (T_OBJECT), array (T_ARRAY),
duke@435: // or one of the primitive types such as T_INT.
duke@435: 
duke@435: // ------------------------------------------------------------------
duke@435: // ciType::ciType
duke@435: //
coleenp@4037: ciType::ciType(BasicType basic_type) : ciMetadata() {
duke@435:   assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check");
duke@435:   _basic_type = basic_type;
duke@435: }
duke@435: 
coleenp@4037: ciType::ciType(KlassHandle k) : ciMetadata(k()) {
hseigel@4278:   _basic_type = k()->oop_is_array() ? T_ARRAY : T_OBJECT;
duke@435: }
duke@435: 
duke@435: 
duke@435: // ------------------------------------------------------------------
duke@435: // ciType::is_subtype_of
duke@435: //
duke@435: bool ciType::is_subtype_of(ciType* type) {
duke@435:   if (this == type)  return true;
duke@435:   if (is_klass() && type->is_klass())
duke@435:     return this->as_klass()->is_subtype_of(type->as_klass());
duke@435:   return false;
duke@435: }
duke@435: 
duke@435: // ------------------------------------------------------------------
twisti@4447: // ciType::name
twisti@4447: //
twisti@4447: // Return the name of this type
twisti@4447: const char* ciType::name() {
twisti@4447:   if (is_primitive_type()) {
twisti@4447:     return type2name(basic_type());
twisti@4447:   } else {
twisti@4447:     assert(is_klass(), "must be");
twisti@4447:     return as_klass()->name()->as_utf8();
twisti@4447:   }
twisti@4447: }
twisti@4447: 
twisti@4447: // ------------------------------------------------------------------
duke@435: // ciType::print_impl
duke@435: //
duke@435: // Implementation of the print method.
duke@435: void ciType::print_impl(outputStream* st) {
duke@435:   st->print(" type=");
duke@435:   print_name_on(st);
duke@435: }
duke@435: 
duke@435: // ------------------------------------------------------------------
duke@435: // ciType::print_name
duke@435: //
duke@435: // Print the name of this type
duke@435: void ciType::print_name_on(outputStream* st) {
twisti@4447:   ResourceMark rm;
twisti@4447:   st->print(name());
duke@435: }
duke@435: 
duke@435: 
duke@435: 
duke@435: // ------------------------------------------------------------------
duke@435: // ciType::java_mirror
duke@435: //
duke@435: ciInstance* ciType::java_mirror() {
duke@435:   VM_ENTRY_MARK;
coleenp@4037:   return CURRENT_THREAD_ENV->get_instance(Universe::java_mirror(basic_type()));
duke@435: }
duke@435: 
duke@435: // ------------------------------------------------------------------
duke@435: // ciType::box_klass
duke@435: //
duke@435: ciKlass* ciType::box_klass() {
duke@435:   if (!is_primitive_type())  return this->as_klass();  // reference types are "self boxing"
duke@435: 
duke@435:   // Void is "boxed" with a null.
duke@435:   if (basic_type() == T_VOID)  return NULL;
duke@435: 
duke@435:   VM_ENTRY_MARK;
coleenp@4037:   return CURRENT_THREAD_ENV->get_instance_klass(SystemDictionary::box_klass(basic_type()));
duke@435: }
duke@435: 
duke@435: 
duke@435: // ------------------------------------------------------------------
duke@435: // ciType::make
duke@435: //
duke@435: // Produce the ciType for a given primitive BasicType.
duke@435: // As a bonus, produce the right reference type for T_OBJECT.
duke@435: // Does not work on T_ARRAY.
duke@435: ciType* ciType::make(BasicType t) {
duke@435:   // short, etc.
duke@435:   // Note: Bare T_ADDRESS means a raw pointer type, not a return_address.
duke@435:   assert((uint)t < T_CONFLICT+1, "range check");
never@1577:   if (t == T_OBJECT)  return ciEnv::_Object_klass;  // java/lang/Object
duke@435:   assert(_basic_types[t] != NULL, "domain check");
duke@435:   return _basic_types[t];
duke@435: }
duke@435: 
duke@435: // ciReturnAddress
duke@435: //
duke@435: // This class represents the type of a specific return address in the
duke@435: // bytecodes.
duke@435: 
duke@435: // ------------------------------------------------------------------
duke@435: // ciReturnAddress::ciReturnAddress
duke@435: //
duke@435: ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) {
duke@435:   assert(0 <= bci, "bci cannot be negative");
duke@435:   _bci = bci;
duke@435: }
duke@435: 
duke@435: // ------------------------------------------------------------------
duke@435: // ciReturnAddress::print_impl
duke@435: //
duke@435: // Implementation of the print method.
duke@435: void ciReturnAddress::print_impl(outputStream* st) {
duke@435:   st->print(" bci=%d", _bci);
duke@435: }
duke@435: 
duke@435: // ------------------------------------------------------------------
duke@435: // ciReturnAddress::make
duke@435: ciReturnAddress* ciReturnAddress::make(int bci) {
duke@435:   GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);)
duke@435: }