jdk8-mips64-public/hotspot: src/share/vm/ci/ciArrayKlass.hpp@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 #ifndef SHARE_VM_CI_CIARRAYKLASS_HPP

    26 #define SHARE_VM_CI_CIARRAYKLASS_HPP

    28 #include "ci/ciKlass.hpp"

    30 // ciArrayKlass

    31 //

    32 // This class, and its subclasses represent Klass*s in the

    33 // HotSpot virtual machine whose Klass part is an ArrayKlass.

    34 class ciArrayKlass : public ciKlass {

    35   CI_PACKAGE_ACCESS

    36 private:

    37   jint _dimension;

    39 protected:

    40   ciArrayKlass(KlassHandle h_k);

    41   ciArrayKlass(ciSymbol* name, int dimension, BasicType bt);

    43   ArrayKlass* get_ArrayKlass() {

    44     return (ArrayKlass*)get_Klass();

    45   }

    47   const char* type_string() { return "ciArrayKlass"; }

    49 public:

    50   jint dimension() { return _dimension; }

    51   ciType* element_type();       // JLS calls this the "component type"

    52   ciType* base_element_type();  // JLS calls this the "element type"

    53   bool is_leaf_type();          // No subtypes of this array type.

    55   ciInstance* component_mirror() {

    56     // This is a real field in ArrayKlass, but we derive it from element_type.

    57     return element_type()->java_mirror();

    58   }

    60   // What kind of vmObject is this?

    61   bool is_array_klass() const { return true; }

    62   bool is_java_klass() const  { return true; }

    64   static ciArrayKlass* make(ciType* element_type);

    65 };

    67 #endif // SHARE_VM_CI_CIARRAYKLASS_HPP

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

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

src/share/vm/ci/ciArrayKlass.hpp