1 /*
2 * Copyright (c) 2009, 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 class StringConcat;
26
27 class PhaseStringOpts : public Phase {
28 friend class StringConcat;
29
30 private:
31 PhaseGVN* _gvn;
32
33 // List of dead nodes to clean up aggressively at the end
34 Unique_Node_List dead_worklist;
35
36 // Memory slices needed for code gen
37 int char_adr_idx;
38 int value_field_idx;
39 int count_field_idx;
40 int offset_field_idx;
41
42 // Integer.sizeTable - used for int to String conversion
43 ciField* size_table_field;
44
64 // Copy the characters representing value into char_array starting at start
65 void int_getChars(GraphKit& kit, Node* value, Node* char_array, Node* start, Node* end);
66
67 // Copy of the contents of the String str into char_array starting at index start.
68 Node* copy_string(GraphKit& kit, Node* str, Node* char_array, Node* start);
69
70 // Clean up any leftover nodes
71 void record_dead_node(Node* node);
72 void remove_dead_nodes();
73
74 PhaseGVN* gvn() { return _gvn; }
75
76 enum {
77 // max length of constant string copy unrolling in copy_string
78 unroll_string_copy_length = 6
79 };
80
81 public:
82 PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist);
83 };
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1 /*
2 * Copyright (c) 2009, 2010, 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 int value_field_idx;
45 int count_field_idx;
46 int offset_field_idx;
47
48 // Integer.sizeTable - used for int to String conversion
49 ciField* size_table_field;
50
70 // Copy the characters representing value into char_array starting at start
71 void int_getChars(GraphKit& kit, Node* value, Node* char_array, Node* start, Node* end);
72
73 // Copy of the contents of the String str into char_array starting at index start.
74 Node* copy_string(GraphKit& kit, Node* str, Node* char_array, Node* start);
75
76 // Clean up any leftover nodes
77 void record_dead_node(Node* node);
78 void remove_dead_nodes();
79
80 PhaseGVN* gvn() { return _gvn; }
81
82 enum {
83 // max length of constant string copy unrolling in copy_string
84 unroll_string_copy_length = 6
85 };
86
87 public:
88 PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist);
89 };
90
91 #endif // SHARE_VM_OPTO_STRINGOPTS_HPP
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