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src/share/vm/ci/ciMethodBlocks.hpp@b2ee5dc63353 (annotated)

src/share/vm/ci/ciMethodBlocks.hpp

Wed, 23 Oct 2013 12:40:23 +0200

author

roland

date

Wed, 23 Oct 2013 12:40:23 +0200

changeset 5991

b2ee5dc63353

parent 2314

f95d63e2154a

child 6876

710a3c8b516e

permissions

-rw-r--r--

8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti

duke@435	1	/*
stefank@2314	2	* Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	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.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_CI_CIMETHODBLOCKS_HPP
stefank@2314	26	#define SHARE_VM_CI_CIMETHODBLOCKS_HPP
stefank@2314	27
stefank@2314	28	#include "ci/ciMethod.hpp"
stefank@2314	29	#include "memory/resourceArea.hpp"
stefank@2314	30	#include "utilities/growableArray.hpp"
stefank@2314	31
duke@435	32
duke@435	33	class ciBlock;
duke@435	34
duke@435	35	typedef short ciBlockIndex;
duke@435	36
duke@435	37	class ciMethodBlocks : public ResourceObj {
duke@435	38	private:
duke@435	39	ciMethod *_method;
duke@435	40	Arena *_arena;
duke@435	41	GrowableArray<ciBlock *> *_blocks;
duke@435	42	ciBlock **_bci_to_block;
duke@435	43	int _num_blocks;
duke@435	44	int _code_size;
duke@435	45
duke@435	46	void do_analysis();
duke@435	47	public:
duke@435	48	ciMethodBlocks(Arena *arena, ciMethod *meth);
duke@435	49
duke@435	50	ciBlock *block_containing(int bci);
duke@435	51	ciBlock *block(int index) { return _blocks->at(index); }
duke@435	52	ciBlock *make_block_at(int bci);
duke@435	53	ciBlock *split_block_at(int bci);
duke@435	54	bool is_block_start(int bci);
duke@435	55	int num_blocks() { return _num_blocks;}
duke@435	56	void clear_processed();
duke@435	57
never@802	58	ciBlock *make_dummy_block(); // a block not associated with a bci
never@802	59
duke@435	60	#ifndef PRODUCT
duke@435	61	void dump();
duke@435	62	#endif
duke@435	63	};
duke@435	64
duke@435	65	class ciBlock : public ResourceObj {
duke@435	66	private:
duke@435	67	int _idx;
duke@435	68	int _start_bci;
duke@435	69	int _limit_bci;
duke@435	70	int _control_bci;
duke@435	71	uint _flags;
duke@435	72	int _ex_start_bci;
duke@435	73	int _ex_limit_bci;
duke@435	74	#ifndef PRODUCT
duke@435	75	ciMethod *_method;
duke@435	76	#endif
duke@435	77	enum {
duke@435	78	Processed = (1 << 0),
duke@435	79	Handler = (1 << 1),
duke@435	80	MayThrow = (1 << 2),
duke@435	81	DoesJsr = (1 << 3),
duke@435	82	DoesRet = (1 << 4),
duke@435	83	RetTarget = (1 << 5),
duke@435	84	HasHandler = (1 << 6)
duke@435	85	};
duke@435	86
duke@435	87
duke@435	88	public:
duke@435	89	enum {
duke@435	90	fall_through_bci = -1
duke@435	91	};
duke@435	92
never@802	93	ciBlock(ciMethod *method, int index, int start_bci);
duke@435	94	int start_bci() const { return _start_bci; }
duke@435	95	int limit_bci() const { return _limit_bci; }
duke@435	96	int control_bci() const { return _control_bci; }
duke@435	97	int index() const { return _idx; }
duke@435	98	void set_start_bci(int bci) { _start_bci = bci; }
duke@435	99	void set_limit_bci(int bci) { _limit_bci = bci; }
duke@435	100	void set_control_bci(int bci) { _control_bci = bci;}
duke@435	101	void set_exception_range(int start_bci, int limit_bci);
duke@435	102	int ex_start_bci() const { return _ex_start_bci; }
duke@435	103	int ex_limit_bci() const { return _ex_limit_bci; }
duke@435	104	bool contains(int bci) const { return start_bci() <= bci && bci < limit_bci(); }
duke@435	105
duke@435	106	// flag handling
duke@435	107	bool processed() const { return (_flags & Processed) != 0; }
duke@435	108	bool is_handler() const { return (_flags & Handler) != 0; }
duke@435	109	bool may_throw() const { return (_flags & MayThrow) != 0; }
duke@435	110	bool does_jsr() const { return (_flags & DoesJsr) != 0; }
duke@435	111	bool does_ret() const { return (_flags & DoesRet) != 0; }
duke@435	112	bool has_handler() const { return (_flags & HasHandler) != 0; }
duke@435	113	bool is_ret_target() const { return (_flags & RetTarget) != 0; }
duke@435	114	void set_processed() { _flags |= Processed; }
duke@435	115	void clear_processed() { _flags &= ~Processed; }
duke@435	116	void set_handler() { _flags |= Handler; }
duke@435	117	void set_may_throw() { _flags |= MayThrow; }
duke@435	118	void set_does_jsr() { _flags |= DoesJsr; }
duke@435	119	void clear_does_jsr() { _flags &= ~DoesJsr; }
duke@435	120	void set_does_ret() { _flags |= DoesRet; }
kvn@461	121	void clear_does_ret() { _flags &= ~DoesRet; }
duke@435	122	void set_is_ret_target() { _flags |= RetTarget; }
duke@435	123	void set_has_handler() { _flags |= HasHandler; }
kvn@461	124	void clear_exception_handler() { _flags &= ~Handler; _ex_start_bci = -1; _ex_limit_bci = -1; }
duke@435	125	#ifndef PRODUCT
duke@435	126	ciMethod *method() const { return _method; }
duke@435	127	void dump();
duke@435	128	void print_on(outputStream* st) const PRODUCT_RETURN;
duke@435	129	#endif
duke@435	130	};
stefank@2314	131
stefank@2314	132	#endif // SHARE_VM_CI_CIMETHODBLOCKS_HPP