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src/share/vm/opto/regalloc.hpp@98cb887364d3 (annotated)

src/share/vm/opto/regalloc.hpp

Fri, 27 Feb 2009 13:27:09 -0800

author

twisti

date

Fri, 27 Feb 2009 13:27:09 -0800

changeset 1040

98cb887364d3

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6810672: Comment typos
Summary: I have collected some typos I have found while looking at the code.
Reviewed-by: kvn, never

duke@435	1	/*
duke@435	2	* Copyright 2000-2006 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	class Node;
duke@435	26	class Matcher;
duke@435	27	class PhaseCFG;
duke@435	28
duke@435	29	#define MAX_REG_ALLOCATORS 10
duke@435	30
duke@435	31	//------------------------------PhaseRegAlloc------------------------------------
duke@435	32	// Abstract register allocator
duke@435	33	class PhaseRegAlloc : public Phase {
duke@435	34	static void (*_alloc_statistics[MAX_REG_ALLOCATORS])();
duke@435	35	static int _num_allocators;
duke@435	36
duke@435	37	protected:
duke@435	38	OptoRegPair *_node_regs;
duke@435	39	uint _node_regs_max_index;
duke@435	40	VectorSet _node_oops; // Mapping from node indices to oopiness
duke@435	41
duke@435	42	void alloc_node_regs(int size); // allocate _node_regs table with at least "size" elements
duke@435	43
duke@435	44	PhaseRegAlloc( uint unique, PhaseCFG &cfg, Matcher &matcher,
duke@435	45	void (*pr_stats)());
duke@435	46	public:
duke@435	47	PhaseCFG &_cfg; // Control flow graph
duke@435	48	uint _framesize; // Size of frame in stack-slots. not counting preserve area
duke@435	49	OptoReg::Name _max_reg; // Past largest register seen
duke@435	50	Matcher &_matcher; // Convert Ideal to MachNodes
duke@435	51	uint node_regs_max_index() const { return _node_regs_max_index; }
duke@435	52
duke@435	53	// Get the register associated with the Node
duke@435	54	OptoReg::Name get_reg_first( const Node *n ) const {
duke@435	55	debug_only( if( n->_idx >= _node_regs_max_index ) n->dump(); );
duke@435	56	assert( n->_idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435	57	return _node_regs[n->_idx].first();
duke@435	58	}
duke@435	59	OptoReg::Name get_reg_second( const Node *n ) const {
duke@435	60	debug_only( if( n->_idx >= _node_regs_max_index ) n->dump(); );
duke@435	61	assert( n->_idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435	62	return _node_regs[n->_idx].second();
duke@435	63	}
duke@435	64
duke@435	65	// Do all the real work of allocate
duke@435	66	virtual void Register_Allocate() = 0;
duke@435	67
duke@435	68
duke@435	69	// notify the register allocator that "node" is a new reference
duke@435	70	// to the value produced by "old_node"
duke@435	71	virtual void add_reference( const Node *node, const Node *old_node) = 0;
duke@435	72
duke@435	73
duke@435	74	// Set the register associated with a new Node
duke@435	75	void set_bad( uint idx ) {
duke@435	76	assert( idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435	77	_node_regs[idx].set_bad();
duke@435	78	}
duke@435	79	void set1( uint idx, OptoReg::Name reg ) {
duke@435	80	assert( idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435	81	_node_regs[idx].set1(reg);
duke@435	82	}
duke@435	83	void set2( uint idx, OptoReg::Name reg ) {
duke@435	84	assert( idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435	85	_node_regs[idx].set2(reg);
duke@435	86	}
duke@435	87	void set_pair( uint idx, OptoReg::Name hi, OptoReg::Name lo ) {
duke@435	88	assert( idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435	89	_node_regs[idx].set_pair(hi, lo);
duke@435	90	}
duke@435	91	void set_ptr( uint idx, OptoReg::Name reg ) {
duke@435	92	assert( idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435	93	_node_regs[idx].set_ptr(reg);
duke@435	94	}
duke@435	95	// Set and query if a node produces an oop
duke@435	96	void set_oop( const Node *n, bool );
duke@435	97	bool is_oop( const Node *n ) const;
duke@435	98
duke@435	99	// Convert a register number to a stack offset
duke@435	100	int reg2offset ( OptoReg::Name reg ) const;
duke@435	101	int reg2offset_unchecked( OptoReg::Name reg ) const;
duke@435	102
duke@435	103	// Convert a stack offset to a register number
duke@435	104	OptoReg::Name offset2reg( int stk_offset ) const;
duke@435	105
duke@435	106	// Get the register encoding associated with the Node
duke@435	107	int get_encode( const Node *n ) const {
duke@435	108	assert( n->_idx < _node_regs_max_index, "Exceeded _node_regs array");
duke@435	109	OptoReg::Name first = _node_regs[n->_idx].first();
duke@435	110	OptoReg::Name second = _node_regs[n->_idx].second();
duke@435	111	assert( !OptoReg::is_valid(second) || second == first+1, "" );
duke@435	112	assert(OptoReg::is_reg(first), "out of range");
duke@435	113	return Matcher::_regEncode[first];
duke@435	114	}
duke@435	115
duke@435	116	// Platform dependent hook for actions prior to allocation
duke@435	117	void pd_preallocate_hook();
duke@435	118
duke@435	119	#ifdef ASSERT
duke@435	120	// Platform dependent hook for verification after allocation. Will
duke@435	121	// only get called when compiling with asserts.
duke@435	122	void pd_postallocate_verify_hook();
duke@435	123	#endif
duke@435	124
duke@435	125	#ifndef PRODUCT
duke@435	126	static int _total_framesize;
duke@435	127	static int _max_framesize;
duke@435	128
duke@435	129	virtual void dump_frame() const = 0;
duke@435	130	virtual char *dump_register( const Node *n, char *buf ) const = 0;
duke@435	131	static void print_statistics();
duke@435	132	#endif
duke@435	133	};