| /* |
| * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_OPTO_STRINGOPTS_HPP |
| #define SHARE_VM_OPTO_STRINGOPTS_HPP |
| |
| #include "opto/node.hpp" |
| #include "opto/phaseX.hpp" |
| |
| class StringConcat; |
| |
| class PhaseStringOpts : public Phase { |
| friend class StringConcat; |
| |
| private: |
| PhaseGVN* _gvn; |
| |
| // List of dead nodes to clean up aggressively at the end |
| Unique_Node_List dead_worklist; |
| |
| // Memory slices needed for code gen |
| int char_adr_idx; |
| |
| // Integer.sizeTable - used for int to String conversion |
| ciField* size_table_field; |
| |
| // A set for use by various stages |
| VectorSet _visited; |
| |
| // Collect a list of all SB.toString calls |
| Node_List collect_toString_calls(); |
| |
| // Examine the use of the SB alloc to see if it can be replace with |
| // a single string construction. |
| StringConcat* build_candidate(CallStaticJavaNode* call); |
| |
| // Replace all the SB calls in concat with an optimization String allocation |
| void replace_string_concat(StringConcat* concat); |
| |
| // Load the value of a static field, performing any constant folding. |
| Node* fetch_static_field(GraphKit& kit, ciField* field); |
| |
| // Compute the number of characters required to represent the int value |
| Node* int_stringSize(GraphKit& kit, Node* value); |
| |
| // Copy the characters representing value into char_array starting at start |
| void int_getChars(GraphKit& kit, Node* value, Node* char_array, Node* start, Node* end); |
| |
| // Copy of the contents of the String str into char_array starting at index start. |
| Node* copy_string(GraphKit& kit, Node* str, Node* char_array, Node* start); |
| |
| // Clean up any leftover nodes |
| void record_dead_node(Node* node); |
| void remove_dead_nodes(); |
| |
| PhaseGVN* gvn() { return _gvn; } |
| |
| enum { |
| // max length of constant string copy unrolling in copy_string |
| unroll_string_copy_length = 6 |
| }; |
| |
| public: |
| PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist); |
| }; |
| |
| #endif // SHARE_VM_OPTO_STRINGOPTS_HPP |