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src/share/vm/opto/stringopts.hpp@96ef09c26978 (annotated)

src/share/vm/opto/stringopts.hpp

Sat, 16 Mar 2013 07:39:14 -0700

author

morris

date

Sat, 16 Mar 2013 07:39:14 -0700

changeset 4760

96ef09c26978

parent 3760

8f972594effc

child 6876

710a3c8b516e

permissions

-rw-r--r--

8009166: [parfait] Null pointer deference in hotspot/src/share/vm/opto/type.cpp
Summary: add guarantee() to as_instance_type()
Reviewed-by: kvn, twisti

never@1515	1	/*
kvn@3760	2	* Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
never@1515	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1515	4	*
never@1515	5	* This code is free software; you can redistribute it and/or modify it
never@1515	6	* under the terms of the GNU General Public License version 2 only, as
never@1515	7	* published by the Free Software Foundation.
never@1515	8	*
never@1515	9	* This code is distributed in the hope that it will be useful, but WITHOUT
never@1515	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1515	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@1515	12	* version 2 for more details (a copy is included in the LICENSE file that
never@1515	13	* accompanied this code).
never@1515	14	*
never@1515	15	* You should have received a copy of the GNU General Public License version
never@1515	16	* 2 along with this work; if not, write to the Free Software Foundation,
never@1515	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1515	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
never@1515	22	*
never@1515	23	*/
never@1515	24
stefank@2314	25	#ifndef SHARE_VM_OPTO_STRINGOPTS_HPP
stefank@2314	26	#define SHARE_VM_OPTO_STRINGOPTS_HPP
stefank@2314	27
stefank@2314	28	#include "opto/node.hpp"
stefank@2314	29	#include "opto/phaseX.hpp"
stefank@2314	30
never@1515	31	class StringConcat;
never@1515	32
never@1515	33	class PhaseStringOpts : public Phase {
never@1515	34	friend class StringConcat;
never@1515	35
never@1515	36	private:
never@1515	37	PhaseGVN* _gvn;
never@1515	38
never@1515	39	// List of dead nodes to clean up aggressively at the end
never@1515	40	Unique_Node_List dead_worklist;
never@1515	41
never@1515	42	// Memory slices needed for code gen
never@1515	43	int char_adr_idx;
never@1515	44
never@1515	45	// Integer.sizeTable - used for int to String conversion
never@1515	46	ciField* size_table_field;
never@1515	47
never@1515	48	// A set for use by various stages
never@1515	49	VectorSet _visited;
never@1515	50
never@1515	51	// Collect a list of all SB.toString calls
never@1515	52	Node_List collect_toString_calls();
never@1515	53
never@1515	54	// Examine the use of the SB alloc to see if it can be replace with
never@1515	55	// a single string construction.
never@1515	56	StringConcat* build_candidate(CallStaticJavaNode* call);
never@1515	57
never@1515	58	// Replace all the SB calls in concat with an optimization String allocation
never@1515	59	void replace_string_concat(StringConcat* concat);
never@1515	60
never@1515	61	// Load the value of a static field, performing any constant folding.
never@1515	62	Node* fetch_static_field(GraphKit& kit, ciField* field);
never@1515	63
never@1515	64	// Compute the number of characters required to represent the int value
never@1515	65	Node* int_stringSize(GraphKit& kit, Node* value);
never@1515	66
never@1515	67	// Copy the characters representing value into char_array starting at start
never@1515	68	void int_getChars(GraphKit& kit, Node* value, Node* char_array, Node* start, Node* end);
never@1515	69
never@1515	70	// Copy of the contents of the String str into char_array starting at index start.
never@1515	71	Node* copy_string(GraphKit& kit, Node* str, Node* char_array, Node* start);
never@1515	72
never@1515	73	// Clean up any leftover nodes
never@1515	74	void record_dead_node(Node* node);
never@1515	75	void remove_dead_nodes();
never@1515	76
never@1515	77	PhaseGVN* gvn() { return _gvn; }
never@1515	78
never@1515	79	enum {
never@1515	80	// max length of constant string copy unrolling in copy_string
never@1515	81	unroll_string_copy_length = 6
never@1515	82	};
never@1515	83
never@1515	84	public:
never@1515	85	PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist);
never@1515	86	};
stefank@2314	87
stefank@2314	88	#endif // SHARE_VM_OPTO_STRINGOPTS_HPP