Thu, 16 Feb 2012 17:12:49 -0800
7145346: VerifyStackAtCalls is broken
Summary: Replace call_epilog() encoding with macroassembler use. Moved duplicated code to x86.ad. Fixed return_addr() definition.
Reviewed-by: never
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
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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).
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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,
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #ifndef SHARE_VM_OPTO_STRINGOPTS_HPP
26 #define SHARE_VM_OPTO_STRINGOPTS_HPP
28 #include "opto/node.hpp"
29 #include "opto/phaseX.hpp"
31 class StringConcat;
33 class PhaseStringOpts : public Phase {
34 friend class StringConcat;
36 private:
37 PhaseGVN* _gvn;
39 // List of dead nodes to clean up aggressively at the end
40 Unique_Node_List dead_worklist;
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;
48 // Integer.sizeTable - used for int to String conversion
49 ciField* size_table_field;
51 // A set for use by various stages
52 VectorSet _visited;
54 // Collect a list of all SB.toString calls
55 Node_List collect_toString_calls();
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);
61 // Replace all the SB calls in concat with an optimization String allocation
62 void replace_string_concat(StringConcat* concat);
64 // Load the value of a static field, performing any constant folding.
65 Node* fetch_static_field(GraphKit& kit, ciField* field);
67 // Compute the number of characters required to represent the int value
68 Node* int_stringSize(GraphKit& kit, Node* value);
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);
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);
76 // Clean up any leftover nodes
77 void record_dead_node(Node* node);
78 void remove_dead_nodes();
80 PhaseGVN* gvn() { return _gvn; }
82 enum {
83 // max length of constant string copy unrolling in copy_string
84 unroll_string_copy_length = 6
85 };
87 public:
88 PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist);
89 };
91 #endif // SHARE_VM_OPTO_STRINGOPTS_HPP