jdk8-mips64-public/hotspot: src/share/vm/opto/stringopts.hpp@96ef09c26978

8009166: [parfait] Null pointer deference in hotspot/src/share/vm/opto/type.cpp
Summary: add guarantee() to as_instance_type()
Reviewed-by: kvn, twisti

     1 /*

     2  * Copyright (c) 2009, 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_OPTO_STRINGOPTS_HPP

    26 #define SHARE_VM_OPTO_STRINGOPTS_HPP

    28 #include "opto/node.hpp"

    29 #include "opto/phaseX.hpp"

    31 class StringConcat;

    33 class PhaseStringOpts : public Phase {

    34   friend class StringConcat;

    36  private:

    37   PhaseGVN* _gvn;

    39   // List of dead nodes to clean up aggressively at the end

    40   Unique_Node_List dead_worklist;

    42   // Memory slices needed for code gen

    43   int char_adr_idx;

    45   // Integer.sizeTable - used for int to String conversion

    46   ciField* size_table_field;

    48   // A set for use by various stages

    49   VectorSet _visited;

    51   // Collect a list of all SB.toString calls

    52   Node_List collect_toString_calls();

    54   // Examine the use of the SB alloc to see if it can be replace with

    55   // a single string construction.

    56   StringConcat* build_candidate(CallStaticJavaNode* call);

    58   // Replace all the SB calls in concat with an optimization String allocation

    59   void replace_string_concat(StringConcat* concat);

    61   // Load the value of a static field, performing any constant folding.

    62   Node* fetch_static_field(GraphKit& kit, ciField* field);

    64   // Compute the number of characters required to represent the int value

    65   Node* int_stringSize(GraphKit& kit, Node* value);

    67   // Copy the characters representing value into char_array starting at start

    68   void int_getChars(GraphKit& kit, Node* value, Node* char_array, Node* start, Node* end);

    70   // Copy of the contents of the String str into char_array starting at index start.

    71   Node* copy_string(GraphKit& kit, Node* str, Node* char_array, Node* start);

    73   // Clean up any leftover nodes

    74   void record_dead_node(Node* node);

    75   void remove_dead_nodes();

    77   PhaseGVN* gvn() { return _gvn; }

    79   enum {

    80     // max length of constant string copy unrolling in copy_string

    81     unroll_string_copy_length = 6

    82   };

    84  public:

    85   PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist);

    86 };

    88 #endif // SHARE_VM_OPTO_STRINGOPTS_HPP

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

src/share/vm/opto/stringopts.hpp@96ef09c26978

src/share/vm/opto/stringopts.hpp