jdk8-mips64-public/hotspot: src/share/vm/ci/ciArrayKlass.cpp@b2ee5dc63353

8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti

     1 /*

     2  * Copyright (c) 1999, 2012, 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  */

    25 #include "precompiled.hpp"

    26 #include "ci/ciArrayKlass.hpp"

    27 #include "ci/ciObjArrayKlass.hpp"

    28 #include "ci/ciTypeArrayKlass.hpp"

    29 #include "ci/ciUtilities.hpp"

    31 // ciArrayKlass

    32 //

    33 // This class represents a Klass* in the HotSpot virtual machine

    34 // whose Klass part in an ArrayKlass.

    36 // ------------------------------------------------------------------

    37 // ciArrayKlass::ciArrayKlass

    38 //

    39 // Loaded array klass.

    40 ciArrayKlass::ciArrayKlass(KlassHandle h_k) : ciKlass(h_k) {

    41   assert(get_Klass()->oop_is_array(), "wrong type");

    42   _dimension = get_ArrayKlass()->dimension();

    43 }

    45 // ------------------------------------------------------------------

    46 // ciArrayKlass::ciArrayKlass

    47 //

    48 // Unloaded array klass.

    49 ciArrayKlass::ciArrayKlass(ciSymbol* name, int dimension, BasicType bt)

    50   : ciKlass(name, bt) {

    51   _dimension = dimension;

    52 }

    54 // ------------------------------------------------------------------

    55 // ciArrayKlass::element_type

    56 //

    57 // What type is obtained when this array is indexed once?

    58 ciType* ciArrayKlass::element_type() {

    59   if (is_type_array_klass()) {

    60     return ciType::make(as_type_array_klass()->element_type());

    61   } else {

    62     return as_obj_array_klass()->element_klass()->as_klass();

    63   }

    64 }

    67 // ------------------------------------------------------------------

    68 // ciArrayKlass::base_element_type

    69 //

    70 // What type is obtained when this array is indexed as many times as possible?

    71 ciType* ciArrayKlass::base_element_type() {

    72   if (is_type_array_klass()) {

    73     return ciType::make(as_type_array_klass()->element_type());

    74   } else {

    75     ciKlass* ek = as_obj_array_klass()->base_element_klass();

    76     if (ek->is_type_array_klass()) {

    77       return ciType::make(ek->as_type_array_klass()->element_type());

    78     }

    79     return ek;

    80   }

    81 }

    84 // ------------------------------------------------------------------

    85 // ciArrayKlass::is_leaf_type

    86 bool ciArrayKlass::is_leaf_type() {

    87   if (is_type_array_klass()) {

    88     return true;

    89   } else {

    90     return as_obj_array_klass()->base_element_klass()->is_leaf_type();

    91   }

    92 }

    95 // ------------------------------------------------------------------

    96 // ciArrayKlass::base_element_type

    97 //

    98 // What type is obtained when this array is indexed as many times as possible?

    99 ciArrayKlass* ciArrayKlass::make(ciType* element_type) {

   100   if (element_type->is_primitive_type()) {

   101     return ciTypeArrayKlass::make(element_type->basic_type());

   102   } else {

   103     return ciObjArrayKlass::make(element_type->as_klass());

   104   }

   105 }

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

src/share/vm/ci/ciArrayKlass.cpp@b2ee5dc63353

src/share/vm/ci/ciArrayKlass.cpp