Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/opto/stringopts.hpp
src/share/vm/opto/stringopts.hpp
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| 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 */ | |
| 24 | |
| 25 #ifndef SHARE_VM_OPTO_STRINGOPTS_HPP | |
| 26 #define SHARE_VM_OPTO_STRINGOPTS_HPP | |
| 27 | |
| 28 #include "opto/node.hpp" | |
| 29 #include "opto/phaseX.hpp" | |
| 30 | |
| 31 class StringConcat; | |
| 32 | |
| 33 class PhaseStringOpts : public Phase { | |
| 34 friend class StringConcat; | |
| 35 | |
| 36 private: | |
| 37 PhaseGVN* _gvn; | |
| 38 | |
| 39 // List of dead nodes to clean up aggressively at the end | |
| 40 Unique_Node_List dead_worklist; | |
| 41 | |
| 42 // Memory slices needed for code gen | |
| 43 int char_adr_idx; | |
| 44 | |
| 45 // Integer.sizeTable - used for int to String conversion | |
| 46 ciField* size_table_field; | |
| 47 | |
| 48 // A set for use by various stages | |
| 49 VectorSet _visited; | |
| 50 | |
| 51 // Collect a list of all SB.toString calls | |
| 52 Node_List collect_toString_calls(); | |
| 53 | |
| 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); | |
| 57 | |
| 58 // Replace all the SB calls in concat with an optimization String allocation | |
| 59 void replace_string_concat(StringConcat* concat); | |
| 60 | |
| 61 // Load the value of a static field, performing any constant folding. | |
| 62 Node* fetch_static_field(GraphKit& kit, ciField* field); | |
| 63 | |
| 64 // Compute the number of characters required to represent the int value | |
| 65 Node* int_stringSize(GraphKit& kit, Node* value); | |
| 66 | |
| 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); | |
| 69 | |
| 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); | |
| 72 | |
| 73 // Clean up any leftover nodes | |
| 74 void record_dead_node(Node* node); | |
| 75 void remove_dead_nodes(); | |
| 76 | |
| 77 PhaseGVN* gvn() { return _gvn; } | |
| 78 | |
| 79 enum { | |
| 80 // max length of constant string copy unrolling in copy_string | |
| 81 unroll_string_copy_length = 6 | |
| 82 }; | |
| 83 | |
| 84 public: | |
| 85 PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist); | |
| 86 }; | |
| 87 | |
| 88 #endif // SHARE_VM_OPTO_STRINGOPTS_HPP |
