resource.h revision 96489 
1/* Definitions for computing resource usage of specific insns.
2   Copyright (C) 1999 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 2, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING.  If not, write to the Free
18Software Foundation, 59 Temple Place - Suite 330, Boston, MA
1902111-1307, USA.  */
20
21/* Macro to clear all resources.  */
22#define CLEAR_RESOURCE(RES)	\
23 do { (RES)->memory = (RES)->unch_memory = (RES)->volatil = (RES)->cc = 0; \
24      CLEAR_HARD_REG_SET ((RES)->regs); } while (0)
25
26/* The resources used by a given insn.  */
27struct resources
28{
29  char memory;		/* Insn sets or needs a memory location.  */
30  char unch_memory;	/* Insn sets of needs a "unchanging" MEM.  */
31  char volatil;		/* Insn sets or needs a volatile memory loc.  */
32  char cc;		/* Insn sets or needs the condition codes.  */
33  HARD_REG_SET regs;	/* Which registers are set or needed.  */
34};
35
36/* The kinds of rtl mark_*_resources will consider */
37enum mark_resource_type
38{
39  MARK_SRC_DEST = 0,
40  MARK_SRC_DEST_CALL = 1,
41  MARK_DEST = 2
42};
43
44extern void mark_target_live_regs 	PARAMS ((rtx, rtx, struct resources *));
45extern void mark_set_resources		PARAMS ((rtx, struct resources *, int,
46					       enum mark_resource_type));
47extern void mark_referenced_resources	PARAMS ((rtx, struct resources *, int));
48extern void clear_hashed_info_for_insn	PARAMS ((rtx));
49extern void incr_ticks_for_insn		PARAMS ((rtx));
50extern void mark_end_of_function_resources PARAMS ((rtx, int));
51extern void init_resource_info		PARAMS ((rtx));
52extern void free_resource_info		PARAMS ((void));
53