jdk8-mips64-public/hotspot: src/share/vm/ci/ciInstance.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, 2011, 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_CIINSTANCE_HPP

    26 #define SHARE_VM_CI_CIINSTANCE_HPP

    28 #include "ci/ciObject.hpp"

    29 #include "oops/instanceOop.hpp"

    31 // ciInstance

    32 //

    33 // This class represents an instanceOop in the HotSpot virtual

    34 // machine.  This is an oop which corresponds to a non-array

    35 // instance of java.lang.Object.

    36 class ciInstance : public ciObject {

    37   CI_PACKAGE_ACCESS

    39 protected:

    40   ciInstance(instanceHandle h_i) : ciObject(h_i) {

    41     assert(h_i()->is_instance(), "wrong type");

    42   }

    44   ciInstance(ciKlass* klass) : ciObject(klass) {}

    46   instanceOop get_instanceOop() { return (instanceOop)get_oop(); }

    48   const char* type_string() { return "ciInstance"; }

    50   void print_impl(outputStream* st);

    52 public:

    53   // If this object is a java mirror, return the corresponding type.

    54   // Otherwise, return NULL.

    55   // (Remember that a java mirror is an instance of java.lang.Class.)

    56   ciType* java_mirror_type();

    58   // What kind of ciObject is this?

    59   bool is_instance()     { return true; }

    60   bool is_java_object()  { return true; }

    62   // Constant value of a field.

    63   ciConstant field_value(ciField* field);

    65   // Constant value of a field at the specified offset.

    66   ciConstant field_value_by_offset(int field_offset);

    68   ciKlass* java_lang_Class_klass();

    69 };

    71 #endif // SHARE_VM_CI_CIINSTANCE_HPP

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

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

src/share/vm/ci/ciInstance.hpp