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annotate src/share/vm/opto/stringopts.hpp @ 6042:847da049d62f
7162094: LateInlineCallGenerator::do_late_inline crashed on uninitialized _call_node
Reviewed-by: never, twisti
Contributed-by: nils.eliasson@oracle.com
author | never |
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date | Tue, 17 Apr 2012 11:04:22 -0700 |
parents | f95d63e2154a |
children | 8f972594effc |
rev | line source |
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1080 | 1 /* |
1972 | 2 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. |
1080 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
1080 | 22 * |
23 */ | |
24 | |
1972 | 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 | |
1080 | 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 | |
51 // A set for use by various stages | |
52 VectorSet _visited; | |
53 | |
54 // Collect a list of all SB.toString calls | |
55 Node_List collect_toString_calls(); | |
56 | |
57 // Examine the use of the SB alloc to see if it can be replace with | |
58 // a single string construction. | |
59 StringConcat* build_candidate(CallStaticJavaNode* call); | |
60 | |
61 // Replace all the SB calls in concat with an optimization String allocation | |
62 void replace_string_concat(StringConcat* concat); | |
63 | |
64 // Load the value of a static field, performing any constant folding. | |
65 Node* fetch_static_field(GraphKit& kit, ciField* field); | |
66 | |
67 // Compute the number of characters required to represent the int value | |
68 Node* int_stringSize(GraphKit& kit, Node* value); | |
69 | |
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 }; | |
1972 | 90 |
91 #endif // SHARE_VM_OPTO_STRINGOPTS_HPP |