jdk8-mips64-public/hotspot: src/share/vm/ci/ciArray.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, 2010, 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_CIARRAY_HPP

    26 #define SHARE_VM_CI_CIARRAY_HPP

    28 #include "ci/ciArrayKlass.hpp"

    29 #include "ci/ciConstant.hpp"

    30 #include "ci/ciObject.hpp"

    31 #include "oops/arrayOop.hpp"

    32 #include "oops/objArrayOop.hpp"

    33 #include "oops/typeArrayOop.hpp"

    35 // ciArray

    36 //

    37 // This class represents an arrayOop in the HotSpot virtual

    38 // machine.

    39 class ciArray : public ciObject {

    40 private:

    41   int _length;

    43 protected:

    44   ciArray(    arrayHandle h_a) : ciObject(h_a), _length(h_a()->length()) {}

    45   ciArray( objArrayHandle h_a) : ciObject(h_a), _length(h_a()->length()) {}

    46   ciArray(typeArrayHandle h_a) : ciObject(h_a), _length(h_a()->length()) {}

    48   ciArray(ciKlass* klass, int len) : ciObject(klass), _length(len) {}

    50   arrayOop get_arrayOop() const { return (arrayOop)get_oop(); }

    52   const char* type_string() { return "ciArray"; }

    54   void print_impl(outputStream* st);

    56   ciConstant element_value_impl(BasicType elembt, arrayOop ary, int index);

    58 public:

    59   int length() { return _length; }

    61   // Convenience routines.

    62   ciArrayKlass* array_type()         { return klass()->as_array_klass(); }

    63   ciType*       element_type()       { return array_type()->element_type(); }

    64   BasicType     element_basic_type() { return element_type()->basic_type(); }

    66   // Current value of an element.

    67   // Returns T_ILLEGAL if there is no element at the given index.

    68   ciConstant element_value(int index);

    70   // Current value of an element at the specified offset.

    71   // Returns T_ILLEGAL if there is no element at the given offset.

    72   ciConstant element_value_by_offset(intptr_t element_offset);

    74   // What kind of ciObject is this?

    75   bool is_array()        { return true; }

    76   bool is_java_object()  { return true; }

    77 };

    79 #endif // SHARE_VM_CI_CIARRAY_HPP

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

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

src/share/vm/ci/ciArray.hpp