[gcc.git] / gcc / df.h

/* Form lists of pseudo register references for autoinc optimization
   for GNU compiler.  This is part of flow optimization.  
   Copyright (C) 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
   Contributed by Michael P. Hayes (m.hayes@elec.canterbury.ac.nz)

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING.  If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.  */

#define DF_RD		 1	/* Reaching definitions.  */
#define DF_RU		 2	/* Reaching uses.  */
#define DF_LR		 4	/* Live registers.  */
#define DF_DU_CHAIN	 8	/* Def-use chain.  */
#define DF_UD_CHAIN     16	/* Use-def chain.  */
#define DF_REG_INFO	32	/* Register info.  */
#define DF_RD_CHAIN	64	/* Reg-def chain.  */
#define DF_RU_CHAIN    128	/* Reg-use chain.  */
#define DF_ALL	       255
#define DF_HARD_REGS  1024	/* Mark hard registers.  */
#define DF_EQUIV_NOTES 2048	/* Mark uses present in EQUIV/EQUAL notes.  */
#define DF_FOR_REGALLOC 4096    /* If called for the register allocator.  */

enum df_ref_type {DF_REF_REG_DEF, DF_REF_REG_USE, DF_REF_REG_MEM_LOAD,
		  DF_REF_REG_MEM_STORE};

#define DF_REF_TYPE_NAMES {"def", "use", "mem load", "mem store"}

/* Link on a def-use or use-def chain.  */
struct df_link
{
  struct df_link *next;
  struct ref *ref;
};

enum df_ref_flags
  {
    /* Read-modify-write refs generate both a use and a def and
       these are marked with this flag to show that they are not
       independent.  */
    DF_REF_READ_WRITE = 1,
    
    /* This flag is set on register references inside a subreg on
       machines which have CANNOT_CHANGE_MODE_CLASS.
       Note, that this flag can also be set on df_refs representing
       the REG itself (i.e., one might not see the subreg anyore).
       Also note, that this flag is set also for hardreg refs, i.e.,
       you must check yourself if it's a pseudo.  */
    DF_REF_MODE_CHANGE = 2,

    /* This flag is set, if we stripped the subreg from the reference.
       In this case we must make conservative guesses, at what the
       outer mode was.  */
    DF_REF_STRIPPED = 4,

    /* This flag is set during register allocation if it's okay for
    the reference's INSN to have one of its operands replaced with a
    memory reference.  */
    DF_REF_MEM_OK = 8
  };


/* Define a register reference structure.  One of these is allocated
   for every register reference (use or def).  Note some register
   references (e.g., post_inc, subreg) generate both a def and a use.  */
struct ref
{
  rtx reg;			/* The register referenced.  */
  rtx insn;			/* Insn containing ref.  */
  rtx *loc;			/* The location of the reg.  */
  struct df_link *chain;	/* Head of def-use or use-def chain.  */
  unsigned int id;		/* Ref index.  */
  enum df_ref_type type;	/* Type of ref.  */
  enum df_ref_flags flags;	/* Various flags.  */
};


/* One of these structures is allocated for every insn.  */
struct insn_info
{
  struct df_link *defs;		/* Head of insn-def chain.  */
  struct df_link *uses;		/* Head of insn-use chain.  */
  /* ???? The following luid field should be considerd private so that
     we can change it on the fly to accommodate new insns?  */
  int luid;			/* Logical UID.  */
};


/* One of these structures is allocated for every reg.  */
struct reg_info
{
  struct df_link *defs;		/* Head of reg-def chain.  */
  struct df_link *uses;		/* Head of reg-use chain.  */
  int lifetime;
  int n_defs;
  int n_uses;
};


/* One of these structures is allocated for every basic block.  */
struct bb_info
{
  /* Reaching def bitmaps have def_id elements.  */
  bitmap rd_kill;
  bitmap rd_gen;
  bitmap rd_in;
  bitmap rd_out;
  /* Reaching use bitmaps have use_id elements.  */
  bitmap ru_kill;
  bitmap ru_gen;
  bitmap ru_in;
  bitmap ru_out;
  /* Live variable bitmaps have n_regs elements.  */
  bitmap lr_def;
  bitmap lr_use;
  bitmap lr_in;
  bitmap lr_out;
  int rd_valid;
  int ru_valid;
  int lr_valid;
};


struct df
{
  int flags;			/* Indicates what's recorded.  */
  struct bb_info *bbs;		/* Basic block table.  */
  struct ref **defs;		/* Def table, indexed by def_id.  */
  struct ref **uses;		/* Use table, indexed by use_id.  */
  struct ref **reg_def_last;	/* Indexed by regno.  */
  struct reg_info *regs;	/* Regs table, index by regno.  */
  unsigned int reg_size;	/* Size of regs table.  */
  struct insn_info *insns;	/* Insn table, indexed by insn UID.  */
  unsigned int insn_size;	/* Size of insn table.  */
  unsigned int def_id;		/* Next def ID.  */
  unsigned int def_size;	/* Size of def table.  */
  unsigned int n_defs;		/* Size of def bitmaps.  */
  unsigned int use_id;		/* Next use ID.  */
  unsigned int use_size;	/* Size of use table.  */
  unsigned int n_uses;		/* Size of use bitmaps.  */
  unsigned int n_bbs;		/* Number of basic blocks.  */
  unsigned int n_regs;		/* Number of regs.  */
  unsigned int def_id_save;	/* Saved next def ID.  */
  unsigned int use_id_save;	/* Saved next use ID.  */
  bitmap insns_modified;	/* Insns that (may) have changed.  */
  bitmap bbs_modified;		/* Blocks that (may) have changed.  */
  bitmap all_blocks;		/* All blocks in CFG.  */
  /* The sbitmap vector of dominators or NULL if not computed. 
     Ideally, this should be a pointer to a CFG object.  */
  sbitmap *dom;
  int *dfs_order;		/* DFS order -> block number.  */
  int *rc_order;		/* Reverse completion order -> block number.  */
  int *rts_order;		/* Reverse top sort order -> block number.  */
  int *inverse_rc_map;		/* Block number -> reverse completion order.  */
  int *inverse_dfs_map;		/* Block number -> DFS order.  */
  int *inverse_rts_map;		/* Block number -> reverse top-sort order.  */
};


struct df_map
{
  rtx old;
  rtx new;
};


#define DF_BB_INFO(REFS, BB) (&REFS->bbs[(BB)->index])


/* Macros to access the elements within the ref structure.  */

#define DF_REF_REAL_REG(REF) (GET_CODE ((REF)->reg) == SUBREG \
				? SUBREG_REG ((REF)->reg) : ((REF)->reg))
#define DF_REF_REGNO(REF) REGNO (DF_REF_REAL_REG (REF))
#define DF_REF_REAL_LOC(REF) (GET_CODE ((REF)->reg) == SUBREG \
			        ? &SUBREG_REG ((REF)->reg) : ((REF)->loc))
#define DF_REF_REG(REF) ((REF)->reg)
#define DF_REF_LOC(REF) ((REF)->loc)
#define DF_REF_BB(REF) (BLOCK_FOR_INSN ((REF)->insn))
#define DF_REF_BBNO(REF) (BLOCK_FOR_INSN ((REF)->insn)->index)
#define DF_REF_INSN(REF) ((REF)->insn)
#define DF_REF_INSN_UID(REF) (INSN_UID ((REF)->insn))
#define DF_REF_TYPE(REF) ((REF)->type)
#define DF_REF_CHAIN(REF) ((REF)->chain)
#define DF_REF_ID(REF) ((REF)->id)
#define DF_REF_FLAGS(REF) ((REF)->flags)

/* Macros to determine the reference type.  */

#define DF_REF_REG_DEF_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_DEF)
#define DF_REF_REG_USE_P(REF) ((REF) && ! DF_REF_REG_DEF_P (REF))
#define DF_REF_REG_MEM_STORE_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_MEM_STORE)
#define DF_REF_REG_MEM_LOAD_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_MEM_LOAD)
#define DF_REF_REG_MEM_P(REF) (DF_REF_REG_MEM_STORE_P (REF) \
                               || DF_REF_REG_MEM_LOAD_P (REF))


/* Macros to access the elements within the reg_info structure table.  */

#define DF_REGNO_FIRST_DEF(DF, REGNUM) \
((DF)->regs[REGNUM].defs ? (DF)->regs[REGNUM].defs->ref : 0)
#define DF_REGNO_LAST_USE(DF, REGNUM) \
((DF)->regs[REGNUM].uses ? (DF)->regs[REGNUM].uses->ref : 0)

#define DF_REGNO_FIRST_BB(DF, REGNUM) \
(DF_REGNO_FIRST_DEF (DF, REGNUM) \
? DF_REF_BB (DF_REGNO_FIRST_DEF (DF, REGNUM)) : 0)
#define DF_REGNO_LAST_BB(DF, REGNUM) \
(DF_REGNO_LAST_USE (DF, REGNUM) \
? DF_REF_BB (DF_REGNO_LAST_USE (DF, REGNUM)) : 0)


/* Macros to access the elements within the insn_info structure table.  */

#define DF_INSN_LUID(DF, INSN) ((DF)->insns[INSN_UID (INSN)].luid)
#define DF_INSN_DEFS(DF, INSN) ((DF)->insns[INSN_UID (INSN)].defs)
#define DF_INSN_USES(DF, INSN) ((DF)->insns[INSN_UID (INSN)].uses)


/* Functions to build and analyse dataflow information.  */

extern struct df *df_init PARAMS ((void));

extern int df_analyse PARAMS ((struct df *, bitmap, int));

extern void df_finish PARAMS ((struct df *));

extern void df_dump PARAMS ((struct df *, int, FILE *));


/* Functions to modify insns.  */

extern void df_insn_modify PARAMS ((struct df *, basic_block, rtx));

extern rtx df_insn_delete PARAMS ((struct df *, basic_block, rtx));

extern rtx df_pattern_emit_before PARAMS ((struct df *, rtx, 
					   basic_block, rtx));

extern rtx df_jump_pattern_emit_after PARAMS ((struct df *, rtx, 
					       basic_block, rtx));

extern rtx df_pattern_emit_after PARAMS ((struct df *, rtx, 
					  basic_block, rtx));

extern rtx df_insn_move_before PARAMS ((struct df *, basic_block, rtx,
					basic_block, rtx));

extern int df_reg_replace PARAMS ((struct df *, bitmap, rtx, rtx));

extern int df_ref_reg_replace PARAMS ((struct df *, struct ref *, rtx, rtx));

extern int df_ref_remove PARAMS ((struct df *, struct ref *));

extern int df_insn_reg_replace PARAMS ((struct df *, basic_block,
					rtx, rtx, rtx));

extern int df_insn_mem_replace PARAMS ((struct df *, basic_block,
					rtx, rtx, rtx));

extern struct ref *df_bb_def_use_swap PARAMS ((struct df *, basic_block, 
					       rtx, rtx, unsigned int));


/* Functions to query dataflow information.  */

extern basic_block df_regno_bb PARAMS((struct df *, unsigned int));

extern int df_reg_lifetime PARAMS ((struct df *, rtx));

extern int df_reg_global_p PARAMS ((struct df *, rtx));

extern int df_insn_regno_def_p PARAMS ((struct df *, 
					basic_block, rtx, unsigned int));

extern int df_insn_dominates_all_uses_p PARAMS ((struct df *, 
						 basic_block, rtx));

extern int df_insn_dominates_uses_p PARAMS ((struct df *, basic_block,
					     rtx, bitmap));

extern int df_bb_reg_live_start_p PARAMS ((struct df *, basic_block, rtx));

extern int df_bb_reg_live_end_p PARAMS ((struct df *, basic_block, rtx));

extern int df_bb_regs_lives_compare PARAMS ((struct df *, basic_block,
					     rtx, rtx));

extern rtx df_bb_single_def_use_insn_find PARAMS((struct df *, basic_block,
						  rtx, rtx));


/* Functions for debugging from GDB.  */

extern void debug_df_insn PARAMS ((rtx));

extern void debug_df_regno PARAMS ((unsigned int));

extern void debug_df_reg PARAMS ((rtx));

extern void debug_df_defno PARAMS ((unsigned int));

extern void debug_df_useno PARAMS ((unsigned int));

extern void debug_df_ref PARAMS ((struct ref *));

extern void debug_df_chain PARAMS ((struct df_link *));

extern void df_insn_debug PARAMS ((struct df *, rtx, FILE *));

extern void df_insn_debug_regno PARAMS ((struct df *, rtx, FILE *));


/* Meet over any path (UNION) or meet over all paths (INTERSECTION).  */
enum df_confluence_op
  {
    DF_UNION,
    DF_INTERSECTION
  };


/* Dataflow direction.  */
enum df_flow_dir
  {
    DF_FORWARD,
    DF_BACKWARD
  };


typedef void (*transfer_function_sbitmap) PARAMS ((int, int *, sbitmap, sbitmap, 
						   sbitmap, sbitmap, void *));

typedef void (*transfer_function_bitmap) PARAMS ((int, int *, bitmap, bitmap,
						  bitmap, bitmap, void *));

extern void iterative_dataflow_sbitmap PARAMS ((sbitmap *, sbitmap *, 
						sbitmap *, sbitmap *, 
						bitmap, enum df_flow_dir, 
						enum df_confluence_op, 
						transfer_function_sbitmap, 
						int *, void *));

extern void iterative_dataflow_bitmap PARAMS ((bitmap *, bitmap *, bitmap *, 
					       bitmap *, bitmap, 
					       enum df_flow_dir, 
					       enum df_confluence_op, 
					       transfer_function_bitmap, 
					       int *, void *));
extern bool read_modify_subreg_p PARAMS ((rtx));
Commit	Line	Data
10c4b247 JL	1	/* Form lists of pseudo register references for autoinc optimization
10c4b247 JL	2	for GNU compiler. This is part of flow optimization.
7890e8f3	3	Copyright (C) 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
10c4b247 JL	4	Contributed by Michael P. Hayes (m.hayes@elec.canterbury.ac.nz)
10c4b247 JL	5
1322177d	6	This file is part of GCC.
10c4b247	7
1322177d LB	8	GCC is free software; you can redistribute it and/or modify it under
	9	the terms of the GNU General Public License as published by the Free
	10	Software Foundation; either version 2, or (at your option) any later
	11	version.
10c4b247	12
1322177d LB	13	GCC is distributed in the hope that it will be useful, but WITHOUT ANY
	14	WARRANTY; without even the implied warranty of MERCHANTABILITY or
	15	FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	16	for more details.
10c4b247 JL	17
10c4b247 JL	18	You should have received a copy of the GNU General Public License
1322177d LB	19	along with GCC; see the file COPYING. If not, write to the Free
	20	Software Foundation, 59 Temple Place - Suite 330, Boston, MA
	21	02111-1307, USA. */
10c4b247	22
10c4b247 JL	23	#define DF_RD 1 /* Reaching definitions. */
	24	#define DF_RU 2 /* Reaching uses. */
	25	#define DF_LR 4 /* Live registers. */
	26	#define DF_DU_CHAIN 8 /* Def-use chain. */
	27	#define DF_UD_CHAIN 16 /* Use-def chain. */
	28	#define DF_REG_INFO 32 /* Register info. */
	29	#define DF_RD_CHAIN 64 /* Reg-def chain. */
	30	#define DF_RU_CHAIN 128 /* Reg-use chain. */
	31	#define DF_ALL 255
7890e8f3	32	#define DF_HARD_REGS 1024 /* Mark hard registers. */
73991d6a	33	#define DF_EQUIV_NOTES 2048 /* Mark uses present in EQUIV/EQUAL notes. */
50aac998	34	#define DF_FOR_REGALLOC 4096 /* If called for the register allocator. */
10c4b247 JL	35
	36	enum df_ref_type {DF_REF_REG_DEF, DF_REF_REG_USE, DF_REF_REG_MEM_LOAD,
	37	DF_REF_REG_MEM_STORE};
	38
	39	#define DF_REF_TYPE_NAMES {"def", "use", "mem load", "mem store"}
	40
10c4b247 JL	41	/* Link on a def-use or use-def chain. */
	42	struct df_link
	43	{
	44	struct df_link *next;
	45	struct ref *ref;
	46	};
	47
7fcd7218 JH	48	enum df_ref_flags
7fcd7218 JH	49	{
7890e8f3 MH	50	/* Read-modify-write refs generate both a use and a def and
	51	these are marked with this flag to show that they are not
	52	independent. */
ed8d2920	53	DF_REF_READ_WRITE = 1,
7890e8f3 MH	54
7890e8f3 MH	55	/* This flag is set on register references inside a subreg on
50aac998	56	machines which have CANNOT_CHANGE_MODE_CLASS.
7890e8f3 MH	57	Note, that this flag can also be set on df_refs representing
	58	the REG itself (i.e., one might not see the subreg anyore).
	59	Also note, that this flag is set also for hardreg refs, i.e.,
	60	you must check yourself if it's a pseudo. */
50aac998 MM	61	DF_REF_MODE_CHANGE = 2,
	62
	63	/* This flag is set, if we stripped the subreg from the reference.
	64	In this case we must make conservative guesses, at what the
	65	outer mode was. */
b3411d7e DB	66	DF_REF_STRIPPED = 4,
	67
	68	/* This flag is set during register allocation if it's okay for
	69	the reference's INSN to have one of its operands replaced with a
	70	memory reference. */
	71	DF_REF_MEM_OK = 8
7fcd7218	72	};
10c4b247	73
7890e8f3 MH	74
	75	/* Define a register reference structure. One of these is allocated
	76	for every register reference (use or def). Note some register
	77	references (e.g., post_inc, subreg) generate both a def and a use. */
10c4b247 JL	78	struct ref
	79	{
	80	rtx reg; /* The register referenced. */
10c4b247	81	rtx insn; /* Insn containing ref. */
7890e8f3	82	rtx loc; / The location of the reg. */
10c4b247	83	struct df_link chain; / Head of def-use or use-def chain. */
ed8d2920	84	unsigned int id; /* Ref index. */
7890e8f3	85	enum df_ref_type type; /* Type of ref. */
7fcd7218	86	enum df_ref_flags flags; /* Various flags. */
10c4b247 JL	87	};
	88
	89
	90	/* One of these structures is allocated for every insn. */
	91	struct insn_info
	92	{
	93	struct df_link defs; / Head of insn-def chain. */
	94	struct df_link uses; / Head of insn-use chain. */
7890e8f3	95	/* ???? The following luid field should be considerd private so that
f63d1bf7	96	we can change it on the fly to accommodate new insns? */
10c4b247	97	int luid; /* Logical UID. */
10c4b247 JL	98	};
	99
	100
	101	/* One of these structures is allocated for every reg. */
	102	struct reg_info
	103	{
	104	struct df_link defs; / Head of reg-def chain. */
	105	struct df_link uses; / Head of reg-use chain. */
	106	int lifetime;
	107	int n_defs;
	108	int n_uses;
	109	};
	110
	111
	112	/* One of these structures is allocated for every basic block. */
	113	struct bb_info
	114	{
	115	/* Reaching def bitmaps have def_id elements. */
	116	bitmap rd_kill;
	117	bitmap rd_gen;
	118	bitmap rd_in;
	119	bitmap rd_out;
	120	/* Reaching use bitmaps have use_id elements. */
	121	bitmap ru_kill;
	122	bitmap ru_gen;
	123	bitmap ru_in;
	124	bitmap ru_out;
	125	/* Live variable bitmaps have n_regs elements. */
	126	bitmap lr_def;
	127	bitmap lr_use;
	128	bitmap lr_in;
	129	bitmap lr_out;
	130	int rd_valid;
	131	int ru_valid;
	132	int lr_valid;
	133	};
	134
	135
	136	struct df
	137	{
	138	int flags; /* Indicates what's recorded. */
	139	struct bb_info bbs; / Basic block table. */
	140	struct ref *defs; / Def table, indexed by def_id. */
	141	struct ref *uses; / Use table, indexed by use_id. */
	142	struct ref *reg_def_last; / Indexed by regno. */
	143	struct reg_info regs; / Regs table, index by regno. */
	144	unsigned int reg_size; /* Size of regs table. */
	145	struct insn_info insns; / Insn table, indexed by insn UID. */
	146	unsigned int insn_size; /* Size of insn table. */
	147	unsigned int def_id; /* Next def ID. */
	148	unsigned int def_size; /* Size of def table. */
	149	unsigned int n_defs; /* Size of def bitmaps. */
	150	unsigned int use_id; /* Next use ID. */
	151	unsigned int use_size; /* Size of use table. */
	152	unsigned int n_uses; /* Size of use bitmaps. */
	153	unsigned int n_bbs; /* Number of basic blocks. */
	154	unsigned int n_regs; /* Number of regs. */
	155	unsigned int def_id_save; /* Saved next def ID. */
	156	unsigned int use_id_save; /* Saved next use ID. */
	157	bitmap insns_modified; /* Insns that (may) have changed. */
	158	bitmap bbs_modified; /* Blocks that (may) have changed. */
	159	bitmap all_blocks; /* All blocks in CFG. */
2a6f0eca	160	/* The sbitmap vector of dominators or NULL if not computed.
10c4b247	161	Ideally, this should be a pointer to a CFG object. */
2a6f0eca	162	sbitmap *dom;
7890e8f3 MH	163	int dfs_order; / DFS order -> block number. */
	164	int rc_order; / Reverse completion order -> block number. */
	165	int rts_order; / Reverse top sort order -> block number. */
	166	int inverse_rc_map; / Block number -> reverse completion order. */
	167	int inverse_dfs_map; / Block number -> DFS order. */
	168	int inverse_rts_map; / Block number -> reverse top-sort order. */
10c4b247 JL	169	};
	170
	171
	172	struct df_map
	173	{
	174	rtx old;
	175	rtx new;
	176	};
	177
	178
0b17ab2f	179	#define DF_BB_INFO(REFS, BB) (&REFS->bbs[(BB)->index])
10c4b247 JL	180
	181
	182	/* Macros to access the elements within the ref structure. */
7890e8f3	183
10c4b247 JL	184	#define DF_REF_REAL_REG(REF) (GET_CODE ((REF)->reg) == SUBREG \
	185	? SUBREG_REG ((REF)->reg) : ((REF)->reg))
	186	#define DF_REF_REGNO(REF) REGNO (DF_REF_REAL_REG (REF))
	187	#define DF_REF_REAL_LOC(REF) (GET_CODE ((REF)->reg) == SUBREG \
	188	? &SUBREG_REG ((REF)->reg) : ((REF)->loc))
10c4b247 JL	189	#define DF_REF_REG(REF) ((REF)->reg)
10c4b247 JL	190	#define DF_REF_LOC(REF) ((REF)->loc)
5a133afd	191	#define DF_REF_BB(REF) (BLOCK_FOR_INSN ((REF)->insn))
0b17ab2f	192	#define DF_REF_BBNO(REF) (BLOCK_FOR_INSN ((REF)->insn)->index)
10c4b247 JL	193	#define DF_REF_INSN(REF) ((REF)->insn)
	194	#define DF_REF_INSN_UID(REF) (INSN_UID ((REF)->insn))
	195	#define DF_REF_TYPE(REF) ((REF)->type)
	196	#define DF_REF_CHAIN(REF) ((REF)->chain)
	197	#define DF_REF_ID(REF) ((REF)->id)
7fcd7218	198	#define DF_REF_FLAGS(REF) ((REF)->flags)
10c4b247 JL	199
	200	/* Macros to determine the reference type. */
	201
	202	#define DF_REF_REG_DEF_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_DEF)
	203	#define DF_REF_REG_USE_P(REF) ((REF) && ! DF_REF_REG_DEF_P (REF))
	204	#define DF_REF_REG_MEM_STORE_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_MEM_STORE)
	205	#define DF_REF_REG_MEM_LOAD_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_MEM_LOAD)
	206	#define DF_REF_REG_MEM_P(REF) (DF_REF_REG_MEM_STORE_P (REF) \
7890e8f3	207	\|\| DF_REF_REG_MEM_LOAD_P (REF))
10c4b247 JL	208
	209
	210	/* Macros to access the elements within the reg_info structure table. */
	211
	212	#define DF_REGNO_FIRST_DEF(DF, REGNUM) \
	213	((DF)->regs[REGNUM].defs ? (DF)->regs[REGNUM].defs->ref : 0)
	214	#define DF_REGNO_LAST_USE(DF, REGNUM) \
	215	((DF)->regs[REGNUM].uses ? (DF)->regs[REGNUM].uses->ref : 0)
	216
	217	#define DF_REGNO_FIRST_BB(DF, REGNUM) \
	218	(DF_REGNO_FIRST_DEF (DF, REGNUM) \
	219	? DF_REF_BB (DF_REGNO_FIRST_DEF (DF, REGNUM)) : 0)
	220	#define DF_REGNO_LAST_BB(DF, REGNUM) \
	221	(DF_REGNO_LAST_USE (DF, REGNUM) \
	222	? DF_REF_BB (DF_REGNO_LAST_USE (DF, REGNUM)) : 0)
	223
	224
	225	/* Macros to access the elements within the insn_info structure table. */
	226
	227	#define DF_INSN_LUID(DF, INSN) ((DF)->insns[INSN_UID (INSN)].luid)
	228	#define DF_INSN_DEFS(DF, INSN) ((DF)->insns[INSN_UID (INSN)].defs)
	229	#define DF_INSN_USES(DF, INSN) ((DF)->insns[INSN_UID (INSN)].uses)
	230
	231
	232	/* Functions to build and analyse dataflow information. */
	233
	234	extern struct df *df_init PARAMS ((void));
	235
	236	extern int df_analyse PARAMS ((struct df *, bitmap, int));
	237
	238	extern void df_finish PARAMS ((struct df *));
	239
	240	extern void df_dump PARAMS ((struct df , int, FILE ));
	241
7890e8f3	242
10c4b247 JL	243	/* Functions to modify insns. */
	244
	245	extern void df_insn_modify PARAMS ((struct df *, basic_block, rtx));
	246
	247	extern rtx df_insn_delete PARAMS ((struct df *, basic_block, rtx));
	248
	249	extern rtx df_pattern_emit_before PARAMS ((struct df *, rtx,
	250	basic_block, rtx));
	251
	252	extern rtx df_jump_pattern_emit_after PARAMS ((struct df *, rtx,
	253	basic_block, rtx));
	254
	255	extern rtx df_pattern_emit_after PARAMS ((struct df *, rtx,
7890e8f3	256	basic_block, rtx));
10c4b247 JL	257
	258	extern rtx df_insn_move_before PARAMS ((struct df *, basic_block, rtx,
	259	basic_block, rtx));
	260
	261	extern int df_reg_replace PARAMS ((struct df *, bitmap, rtx, rtx));
	262
	263	extern int df_ref_reg_replace PARAMS ((struct df , struct ref , rtx, rtx));
	264
	265	extern int df_ref_remove PARAMS ((struct df , struct ref ));
	266
	267	extern int df_insn_reg_replace PARAMS ((struct df *, basic_block,
	268	rtx, rtx, rtx));
	269
	270	extern int df_insn_mem_replace PARAMS ((struct df *, basic_block,
	271	rtx, rtx, rtx));
	272
	273	extern struct ref df_bb_def_use_swap PARAMS ((struct df , basic_block,
	274	rtx, rtx, unsigned int));
	275
	276
	277	/* Functions to query dataflow information. */
	278
	279	extern basic_block df_regno_bb PARAMS((struct df *, unsigned int));
	280
	281	extern int df_reg_lifetime PARAMS ((struct df *, rtx));
	282
	283	extern int df_reg_global_p PARAMS ((struct df *, rtx));
	284
	285	extern int df_insn_regno_def_p PARAMS ((struct df *,
	286	basic_block, rtx, unsigned int));
	287
	288	extern int df_insn_dominates_all_uses_p PARAMS ((struct df *,
	289	basic_block, rtx));
	290
	291	extern int df_insn_dominates_uses_p PARAMS ((struct df *, basic_block,
	292	rtx, bitmap));
	293
	294	extern int df_bb_reg_live_start_p PARAMS ((struct df *, basic_block, rtx));
	295
	296	extern int df_bb_reg_live_end_p PARAMS ((struct df *, basic_block, rtx));
	297
	298	extern int df_bb_regs_lives_compare PARAMS ((struct df *, basic_block,
	299	rtx, rtx));
	300
	301	extern rtx df_bb_single_def_use_insn_find PARAMS((struct df *, basic_block,
	302	rtx, rtx));
	303
	304
	305	/* Functions for debugging from GDB. */
	306
	307	extern void debug_df_insn PARAMS ((rtx));
	308
	309	extern void debug_df_regno PARAMS ((unsigned int));
	310
	311	extern void debug_df_reg PARAMS ((rtx));
	312
	313	extern void debug_df_defno PARAMS ((unsigned int));
	314
	315	extern void debug_df_useno PARAMS ((unsigned int));
	316
	317	extern void debug_df_ref PARAMS ((struct ref *));
	318
	319	extern void debug_df_chain PARAMS ((struct df_link *));
7890e8f3	320
10c4b247	321	extern void df_insn_debug PARAMS ((struct df , rtx, FILE ));
7890e8f3	322
10c4b247	323	extern void df_insn_debug_regno PARAMS ((struct df , rtx, FILE ));
7890e8f3 MH	324
	325
	326	/* Meet over any path (UNION) or meet over all paths (INTERSECTION). */
2a6f0eca DB	327	enum df_confluence_op
2a6f0eca DB	328	{
7890e8f3 MH	329	DF_UNION,
7890e8f3 MH	330	DF_INTERSECTION
2a6f0eca	331	};
7890e8f3 MH	332
	333
	334	/* Dataflow direction. */
2a6f0eca DB	335	enum df_flow_dir
2a6f0eca DB	336	{
7890e8f3 MH	337	DF_FORWARD,
7890e8f3 MH	338	DF_BACKWARD
2a6f0eca DB	339	};
2a6f0eca DB	340
7890e8f3	341
afb14002	342	typedef void (transfer_function_sbitmap) PARAMS ((int, int , sbitmap, sbitmap,
7890e8f3 MH	343	sbitmap, sbitmap, void *));
7890e8f3 MH	344
afb14002	345	typedef void (transfer_function_bitmap) PARAMS ((int, int , bitmap, bitmap,
7890e8f3	346	bitmap, bitmap, void *));
2a6f0eca DB	347
	348	extern void iterative_dataflow_sbitmap PARAMS ((sbitmap , sbitmap ,
	349	sbitmap , sbitmap ,
	350	bitmap, enum df_flow_dir,
	351	enum df_confluence_op,
	352	transfer_function_sbitmap,
	353	int , void ));
7890e8f3	354
2a6f0eca DB	355	extern void iterative_dataflow_bitmap PARAMS ((bitmap , bitmap , bitmap *,
	356	bitmap *, bitmap,
	357	enum df_flow_dir,
	358	enum df_confluence_op,
	359	transfer_function_bitmap,
	360	int , void ));
37bd08f8	361	extern bool read_modify_subreg_p PARAMS ((rtx));