1f234b83b8
* regrename.h: New file. * regrename.c: Include it. Also include "emit-rtl.h". (struct du_head, struct du_chain, du_head_p DEF_VEC and DEF_VEC_ALLOC_P): Move to regrename.h. (do_replace): Remove declaration. (insn_rr): New variable. (cur_operand): New static variable. (regrename_chain_from_id): Renamed from chain_from_id and no longer static. All callers changed. (record_operand_use): New static function. (scan_rtx_reg): Use it. (find_best_rename_reg): New function, broken out of rename_chains. (rename_chains): Use it. Don't update chain regno and nregs here, ... (regrename_do_replace): ... do it here instead. Renamed from do_replace, and no longer static. All callers changed. (regrename_analyze): No longer static. New arg bb_mask. All callers changed. If bb_mask is nonzero, use it to limit the number of basic blocks we analyze. If we failed to analyze a block, clear insn operand data. (record_out_operands): New arg insn_info. Update cur_operand if it is nonnull. (build_def_use): If insn_rr is nonnull, pass an insn_info to record_out_operands, and update cur_operand here as well. (regrename_init, regrename_finish): New functions. (regrename_optimize): Use them. * Makefile.in (regrename.o): Adjust dependencies. From-SVN: r180198
102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
/* This file contains definitions for the register renamer.
|
|
Copyright (C) 2011
|
|
Free Software Foundation, Inc.
|
|
|
|
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 3, 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 COPYING3. If not see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef GCC_REGRENAME_H
|
|
#define GCC_REGRENAME_H
|
|
|
|
/* We keep linked lists of DU_HEAD structures, each of which describes
|
|
a chain of occurrences of a reg. */
|
|
struct du_head
|
|
{
|
|
/* The next chain. */
|
|
struct du_head *next_chain;
|
|
/* The first and last elements of this chain. */
|
|
struct du_chain *first, *last;
|
|
/* Describes the register being tracked. */
|
|
unsigned regno;
|
|
int nregs;
|
|
|
|
/* A unique id to be used as an index into the conflicts bitmaps. */
|
|
unsigned id;
|
|
/* A bitmap to record conflicts with other chains. */
|
|
bitmap_head conflicts;
|
|
/* Conflicts with untracked hard registers. */
|
|
HARD_REG_SET hard_conflicts;
|
|
|
|
/* Nonzero if the chain crosses a call. */
|
|
unsigned int need_caller_save_reg:1;
|
|
/* Nonzero if the register is used in a way that prevents renaming,
|
|
such as the SET_DEST of a CALL_INSN or an asm operand that used
|
|
to be a hard register. */
|
|
unsigned int cannot_rename:1;
|
|
};
|
|
|
|
typedef struct du_head *du_head_p;
|
|
DEF_VEC_P (du_head_p);
|
|
DEF_VEC_ALLOC_P (du_head_p, heap);
|
|
|
|
/* This struct describes a single occurrence of a register. */
|
|
struct du_chain
|
|
{
|
|
/* Links to the next occurrence of the register. */
|
|
struct du_chain *next_use;
|
|
|
|
/* The insn where the register appears. */
|
|
rtx insn;
|
|
/* The location inside the insn. */
|
|
rtx *loc;
|
|
/* The register class required by the insn at this location. */
|
|
ENUM_BITFIELD(reg_class) cl : 16;
|
|
};
|
|
|
|
/* This struct describes data gathered during regrename_analyze about
|
|
a single operand of an insn. */
|
|
typedef struct
|
|
{
|
|
/* The number of chains recorded for this operand. */
|
|
int n_chains;
|
|
/* Holds either the chain for the operand itself, or for the registers in
|
|
a memory operand. */
|
|
struct du_chain *chains[MAX_REGS_PER_ADDRESS];
|
|
struct du_head *heads[MAX_REGS_PER_ADDRESS];
|
|
} operand_rr_info;
|
|
|
|
/* A struct to hold a vector of operand_rr_info structures describing the
|
|
operands of an insn. */
|
|
typedef struct
|
|
{
|
|
operand_rr_info *op_info;
|
|
} insn_rr_info;
|
|
|
|
DEF_VEC_O (insn_rr_info);
|
|
DEF_VEC_ALLOC_O (insn_rr_info, heap);
|
|
|
|
extern VEC(insn_rr_info, heap) *insn_rr;
|
|
|
|
extern void regrename_init (bool);
|
|
extern void regrename_finish (void);
|
|
extern void regrename_analyze (bitmap);
|
|
extern du_head_p regrename_chain_from_id (unsigned int);
|
|
extern int find_best_rename_reg (du_head_p, enum reg_class, HARD_REG_SET *,
|
|
int);
|
|
extern void regrename_do_replace (du_head_p, int);
|
|
|
|
#endif
|