|
1080
|
1 /*
|
|
|
2 * Copyright 2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
|
20 * CA 95054 USA or visit www.sun.com if you need additional information or
|
|
|
21 * have any 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
|
|
|
45 // A set for use by various stages
|
|
|
46 VectorSet _visited;
|
|
|
47
|
|
|
48 // Collect a list of all SB.toString calls
|
|
|
49 Node_List collect_toString_calls();
|
|
|
50
|
|
|
51 // Examine the use of the SB alloc to see if it can be replace with
|
|
|
52 // a single string construction.
|
|
|
53 StringConcat* build_candidate(CallStaticJavaNode* call);
|
|
|
54
|
|
|
55 // Replace all the SB calls in concat with an optimization String allocation
|
|
|
56 void replace_string_concat(StringConcat* concat);
|
|
|
57
|
|
|
58 // Load the value of a static field, performing any constant folding.
|
|
|
59 Node* fetch_static_field(GraphKit& kit, ciField* field);
|
|
|
60
|
|
|
61 // Compute the number of characters required to represent the int value
|
|
|
62 Node* int_stringSize(GraphKit& kit, Node* value);
|
|
|
63
|
|
|
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 };
|
