Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/opto/stringopts.hpp@f90c822e73f8 (annotated)
src/share/vm/opto/stringopts.hpp
Wed, 27 Apr 2016 01:25:04 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:25:04 +0800
- changeset 0
- f90c822e73f8
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef SHARE_VM_OPTO_STRINGOPTS_HPP |
| aoqi@0 | 26 | #define SHARE_VM_OPTO_STRINGOPTS_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "opto/node.hpp" |
| aoqi@0 | 29 | #include "opto/phaseX.hpp" |
| aoqi@0 | 30 | |
| aoqi@0 | 31 | class StringConcat; |
| aoqi@0 | 32 | |
| aoqi@0 | 33 | class PhaseStringOpts : public Phase { |
| aoqi@0 | 34 | friend class StringConcat; |
| aoqi@0 | 35 | |
| aoqi@0 | 36 | private: |
| aoqi@0 | 37 | PhaseGVN* _gvn; |
| aoqi@0 | 38 | |
| aoqi@0 | 39 | // List of dead nodes to clean up aggressively at the end |
| aoqi@0 | 40 | Unique_Node_List dead_worklist; |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | // Memory slices needed for code gen |
| aoqi@0 | 43 | int char_adr_idx; |
| aoqi@0 | 44 | |
| aoqi@0 | 45 | // Integer.sizeTable - used for int to String conversion |
| aoqi@0 | 46 | ciField* size_table_field; |
| aoqi@0 | 47 | |
| aoqi@0 | 48 | // A set for use by various stages |
| aoqi@0 | 49 | VectorSet _visited; |
| aoqi@0 | 50 | |
| aoqi@0 | 51 | // Collect a list of all SB.toString calls |
| aoqi@0 | 52 | Node_List collect_toString_calls(); |
| aoqi@0 | 53 | |
| aoqi@0 | 54 | // Examine the use of the SB alloc to see if it can be replace with |
| aoqi@0 | 55 | // a single string construction. |
| aoqi@0 | 56 | StringConcat* build_candidate(CallStaticJavaNode* call); |
| aoqi@0 | 57 | |
| aoqi@0 | 58 | // Replace all the SB calls in concat with an optimization String allocation |
| aoqi@0 | 59 | void replace_string_concat(StringConcat* concat); |
| aoqi@0 | 60 | |
| aoqi@0 | 61 | // Load the value of a static field, performing any constant folding. |
| aoqi@0 | 62 | Node* fetch_static_field(GraphKit& kit, ciField* field); |
| aoqi@0 | 63 | |
| aoqi@0 | 64 | // Compute the number of characters required to represent the int value |
| aoqi@0 | 65 | Node* int_stringSize(GraphKit& kit, Node* value); |
| aoqi@0 | 66 | |
| aoqi@0 | 67 | // Copy the characters representing value into char_array starting at start |
| aoqi@0 | 68 | void int_getChars(GraphKit& kit, Node* value, Node* char_array, Node* start, Node* end); |
| aoqi@0 | 69 | |
| aoqi@0 | 70 | // Copy of the contents of the String str into char_array starting at index start. |
| aoqi@0 | 71 | Node* copy_string(GraphKit& kit, Node* str, Node* char_array, Node* start); |
| aoqi@0 | 72 | |
| aoqi@0 | 73 | // Clean up any leftover nodes |
| aoqi@0 | 74 | void record_dead_node(Node* node); |
| aoqi@0 | 75 | void remove_dead_nodes(); |
| aoqi@0 | 76 | |
| aoqi@0 | 77 | PhaseGVN* gvn() { return _gvn; } |
| aoqi@0 | 78 | |
| aoqi@0 | 79 | enum { |
| aoqi@0 | 80 | // max length of constant string copy unrolling in copy_string |
| aoqi@0 | 81 | unroll_string_copy_length = 6 |
| aoqi@0 | 82 | }; |
| aoqi@0 | 83 | |
| aoqi@0 | 84 | public: |
| aoqi@0 | 85 | PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist); |
| aoqi@0 | 86 | }; |
| aoqi@0 | 87 | |
| aoqi@0 | 88 | #endif // SHARE_VM_OPTO_STRINGOPTS_HPP |
