never@1515: /*
kvn@3760:  * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
never@1515:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1515:  *
never@1515:  * This code is free software; you can redistribute it and/or modify it
never@1515:  * under the terms of the GNU General Public License version 2 only, as
never@1515:  * published by the Free Software Foundation.
never@1515:  *
never@1515:  * This code is distributed in the hope that it will be useful, but WITHOUT
never@1515:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1515:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
never@1515:  * version 2 for more details (a copy is included in the LICENSE file that
never@1515:  * accompanied this code).
never@1515:  *
never@1515:  * You should have received a copy of the GNU General Public License version
never@1515:  * 2 along with this work; if not, write to the Free Software Foundation,
never@1515:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1515:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
never@1515:  *
never@1515:  */
never@1515: 
stefank@2314: #ifndef SHARE_VM_OPTO_STRINGOPTS_HPP
stefank@2314: #define SHARE_VM_OPTO_STRINGOPTS_HPP
stefank@2314: 
stefank@2314: #include "opto/node.hpp"
stefank@2314: #include "opto/phaseX.hpp"
stefank@2314: 
never@1515: class StringConcat;
never@1515: 
never@1515: class PhaseStringOpts : public Phase {
never@1515:   friend class StringConcat;
never@1515: 
never@1515:  private:
never@1515:   PhaseGVN* _gvn;
never@1515: 
never@1515:   // List of dead nodes to clean up aggressively at the end
never@1515:   Unique_Node_List dead_worklist;
never@1515: 
never@1515:   // Memory slices needed for code gen
never@1515:   int char_adr_idx;
never@1515: 
never@1515:   // Integer.sizeTable - used for int to String conversion
never@1515:   ciField* size_table_field;
never@1515: 
never@1515:   // A set for use by various stages
never@1515:   VectorSet _visited;
never@1515: 
never@1515:   // Collect a list of all SB.toString calls
never@1515:   Node_List collect_toString_calls();
never@1515: 
never@1515:   // Examine the use of the SB alloc to see if it can be replace with
never@1515:   // a single string construction.
never@1515:   StringConcat* build_candidate(CallStaticJavaNode* call);
never@1515: 
never@1515:   // Replace all the SB calls in concat with an optimization String allocation
never@1515:   void replace_string_concat(StringConcat* concat);
never@1515: 
never@1515:   // Load the value of a static field, performing any constant folding.
never@1515:   Node* fetch_static_field(GraphKit& kit, ciField* field);
never@1515: 
never@1515:   // Compute the number of characters required to represent the int value
never@1515:   Node* int_stringSize(GraphKit& kit, Node* value);
never@1515: 
never@1515:   // Copy the characters representing value into char_array starting at start
never@1515:   void int_getChars(GraphKit& kit, Node* value, Node* char_array, Node* start, Node* end);
never@1515: 
never@1515:   // Copy of the contents of the String str into char_array starting at index start.
never@1515:   Node* copy_string(GraphKit& kit, Node* str, Node* char_array, Node* start);
never@1515: 
never@1515:   // Clean up any leftover nodes
never@1515:   void record_dead_node(Node* node);
never@1515:   void remove_dead_nodes();
never@1515: 
never@1515:   PhaseGVN* gvn() { return _gvn; }
never@1515: 
never@1515:   enum {
never@1515:     // max length of constant string copy unrolling in copy_string
never@1515:     unroll_string_copy_length = 6
never@1515:   };
never@1515: 
never@1515:  public:
never@1515:   PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist);
never@1515: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_OPTO_STRINGOPTS_HPP