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src/share/vm/opto/live.hpp@c18cbe5936b8 (annotated)

src/share/vm/opto/live.hpp

Thu, 27 May 2010 19:08:38 -0700

author

trims

date

Thu, 27 May 2010 19:08:38 -0700

changeset 1907

c18cbe5936b8

parent 435

a61af66fc99e

child 2314

f95d63e2154a

permissions

-rw-r--r--

6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair

duke@435	1	/*
trims@1907	2	* Copyright (c) 1997, 2005, 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
duke@435	25	class Block;
duke@435	26	class LRG_List;
duke@435	27	class PhaseCFG;
duke@435	28	class VectorSet;
duke@435	29	class IndexSet;
duke@435	30
duke@435	31	//------------------------------PhaseLive--------------------------------------
duke@435	32	// Compute live-in/live-out
duke@435	33	class PhaseLive : public Phase {
duke@435	34	// Array of Sets of values live at the start of a block.
duke@435	35	// Indexed by block pre-order number.
duke@435	36	IndexSet *_live;
duke@435	37
duke@435	38	// Array of Sets of values defined locally in the block
duke@435	39	// Indexed by block pre-order number.
duke@435	40	IndexSet *_defs;
duke@435	41
duke@435	42	// Array of delta-set pointers, indexed by block pre-order number
duke@435	43	IndexSet **_deltas;
duke@435	44	IndexSet *_free_IndexSet; // Free list of same
duke@435	45
duke@435	46	Block_List *_worklist; // Worklist for iterative solution
duke@435	47
duke@435	48	const PhaseCFG &_cfg; // Basic blocks
duke@435	49	LRG_List &_names; // Mapping from Nodes to live ranges
duke@435	50	uint _maxlrg; // Largest live-range number
duke@435	51	Arena *_arena;
duke@435	52
duke@435	53	IndexSet *getset( Block *p );
duke@435	54	IndexSet *getfreeset( );
duke@435	55	void freeset( const Block *p );
duke@435	56	void add_liveout( Block *p, uint r, VectorSet &first_pass );
duke@435	57	void add_liveout( Block *p, IndexSet *lo, VectorSet &first_pass );
duke@435	58
duke@435	59	public:
duke@435	60	PhaseLive( const PhaseCFG &cfg, LRG_List &names, Arena *arena );
duke@435	61	~PhaseLive() {}
duke@435	62	// Compute liveness info
duke@435	63	void compute(uint maxlrg);
duke@435	64	// Reset arena storage
duke@435	65	void reset() { _live = NULL; }
duke@435	66
duke@435	67	// Return the live-out set for this block
duke@435	68	IndexSet *live( const Block * b ) { return &_live[b->_pre_order-1]; }
duke@435	69
duke@435	70	#ifndef PRODUCT
duke@435	71	void dump( const Block *b ) const;
duke@435	72	void stats(uint iters) const;
duke@435	73	#endif
duke@435	74	};