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Diffstat (limited to 'contrib/gcc/regs.h')
| -rw-r--r-- | contrib/gcc/regs.h | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/contrib/gcc/regs.h b/contrib/gcc/regs.h deleted file mode 100644 index d513093bf0d5..000000000000 --- a/contrib/gcc/regs.h +++ /dev/null @@ -1,223 +0,0 @@ -/* Define per-register tables for data flow info and register allocation. - Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998 Free Software Foundation, Inc. - -This file is part of GNU CC. - -GNU CC 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. - -GNU CC 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 GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ - - -#include "varray.h" - -#define REG_BYTES(R) mode_size[(int) GET_MODE (R)] - -/* Get the number of consecutive hard regs required to hold the REG rtx R. - When something may be an explicit hard reg, REG_SIZE is the only - valid way to get this value. You cannot get it from the regno. */ - -#define REG_SIZE(R) \ - ((mode_size[(int) GET_MODE (R)] + UNITS_PER_WORD - 1) / UNITS_PER_WORD) - -#ifndef SMALL_REGISTER_CLASSES -#define SMALL_REGISTER_CLASSES 0 -#endif - -/* Maximum register number used in this function, plus one. */ - -extern int max_regno; - -/* Register information indexed by register number */ -typedef struct reg_info_def { - /* fields set by reg_scan */ - int first_uid; /* UID of first insn to use (REG n) */ - int last_uid; /* UID of last insn to use (REG n) */ - int last_note_uid; /* UID of last note to use (REG n) */ - - /* fields set by both reg_scan and flow_analysis */ - int sets; /* # of times (REG n) is set */ - - /* fields set by flow_analysis */ - int refs; /* # of times (REG n) is used or set */ - int deaths; /* # of times (REG n) dies */ - int live_length; /* # of instructions (REG n) is live */ - int calls_crossed; /* # of calls (REG n) is live across */ - int basic_block; /* # of basic blocks (REG n) is used in */ - char changes_size; /* whether (SUBREG (REG n)) changes size */ -} reg_info; - -extern varray_type reg_n_info; - -extern unsigned int reg_n_max; - -/* Indexed by n, gives number of times (REG n) is used or set. - References within loops may be counted more times. */ - -#define REG_N_REFS(N) (VARRAY_REG (reg_n_info, N)->refs) - -/* Indexed by n, gives number of times (REG n) is set. - ??? both regscan and flow allocate space for this. We should settle - on just copy. */ - -#define REG_N_SETS(N) (VARRAY_REG (reg_n_info, N)->sets) - -/* Indexed by N, gives number of insns in which register N dies. - Note that if register N is live around loops, it can die - in transitions between basic blocks, and that is not counted here. - So this is only a reliable indicator of how many regions of life there are - for registers that are contained in one basic block. */ - -#define REG_N_DEATHS(N) (VARRAY_REG (reg_n_info, N)->deaths) - -/* Indexed by N; says whether a pseudo register N was ever used - within a SUBREG that changes the size of the reg. Some machines prohibit - such objects to be in certain (usually floating-point) registers. */ - -#define REG_CHANGES_SIZE(N) (VARRAY_REG (reg_n_info, N)->changes_size) - -/* Get the number of consecutive words required to hold pseudo-reg N. */ - -#define PSEUDO_REGNO_SIZE(N) \ - ((GET_MODE_SIZE (PSEUDO_REGNO_MODE (N)) + UNITS_PER_WORD - 1) \ - / UNITS_PER_WORD) - -/* Get the number of bytes required to hold pseudo-reg N. */ - -#define PSEUDO_REGNO_BYTES(N) \ - GET_MODE_SIZE (PSEUDO_REGNO_MODE (N)) - -/* Get the machine mode of pseudo-reg N. */ - -#define PSEUDO_REGNO_MODE(N) GET_MODE (regno_reg_rtx[N]) - -/* Indexed by N, gives number of CALL_INSNS across which (REG n) is live. */ - -#define REG_N_CALLS_CROSSED(N) (VARRAY_REG (reg_n_info, N)->calls_crossed) - -/* Total number of instructions at which (REG n) is live. - The larger this is, the less priority (REG n) gets for - allocation in a hard register (in global-alloc). - This is set in flow.c and remains valid for the rest of the compilation - of the function; it is used to control register allocation. - - local-alloc.c may alter this number to change the priority. - - Negative values are special. - -1 is used to mark a pseudo reg which has a constant or memory equivalent - and is used infrequently enough that it should not get a hard register. - -2 is used to mark a pseudo reg for a parameter, when a frame pointer - is not required. global.c makes an allocno for this but does - not try to assign a hard register to it. */ - -#define REG_LIVE_LENGTH(N) (VARRAY_REG (reg_n_info, N)->live_length) - -/* Vector of substitutions of register numbers, - used to map pseudo regs into hardware regs. - - This can't be folded into reg_n_info without changing all of the - machine dependent directories, since the reload functions - in the machine dependent files access it. */ - -extern short *reg_renumber; - -/* Vector indexed by hardware reg - saying whether that reg is ever used. */ - -extern char regs_ever_live[FIRST_PSEUDO_REGISTER]; - -/* Vector indexed by hardware reg giving its name. */ - -extern char *reg_names[FIRST_PSEUDO_REGISTER]; - -/* For each hard register, the widest mode object that it can contain. - This will be a MODE_INT mode if the register can hold integers. Otherwise - it will be a MODE_FLOAT or a MODE_CC mode, whichever is valid for the - register. */ - -extern enum machine_mode reg_raw_mode[FIRST_PSEUDO_REGISTER]; - -/* Vector indexed by regno; gives uid of first insn using that reg. - This is computed by reg_scan for use by cse and loop. - It is sometimes adjusted for subsequent changes during loop, - but not adjusted by cse even if cse invalidates it. */ - -#define REGNO_FIRST_UID(N) (VARRAY_REG (reg_n_info, N)->first_uid) - -/* Vector indexed by regno; gives uid of last insn using that reg. - This is computed by reg_scan for use by cse and loop. - It is sometimes adjusted for subsequent changes during loop, - but not adjusted by cse even if cse invalidates it. - This is harmless since cse won't scan through a loop end. */ - -#define REGNO_LAST_UID(N) (VARRAY_REG (reg_n_info, N)->last_uid) - -/* Similar, but includes insns that mention the reg in their notes. */ - -#define REGNO_LAST_NOTE_UID(N) (VARRAY_REG (reg_n_info, N)->last_note_uid) - -/* This is reset to LAST_VIRTUAL_REGISTER + 1 at the start of each function. - After rtl generation, it is 1 plus the largest register number used. */ - -extern int reg_rtx_no; - -/* Vector indexed by regno; contains 1 for a register is considered a pointer. - Reloading, etc. will use a pointer register rather than a non-pointer - as the base register in an address, when there is a choice of two regs. */ - -extern char *regno_pointer_flag; -#define REGNO_POINTER_FLAG(REGNO) regno_pointer_flag[REGNO] -extern int regno_pointer_flag_length; - -/* List made of EXPR_LIST rtx's which gives pairs of pseudo registers - that have to go in the same hard reg. */ -extern rtx regs_may_share; - -/* Vector mapping pseudo regno into the REG rtx for that register. - This is computed by reg_scan. */ - -extern rtx *regno_reg_rtx; - -/* Flag set by local-alloc or global-alloc if they decide to allocate - something in a call-clobbered register. */ - -extern int caller_save_needed; - -/* Predicate to decide whether to give a hard reg to a pseudo which - is referenced REFS times and would need to be saved and restored - around a call CALLS times. */ - -#ifndef CALLER_SAVE_PROFITABLE -#define CALLER_SAVE_PROFITABLE(REFS, CALLS) (4 * (CALLS) < (REFS)) -#endif - -/* On most machines a register class is likely to be spilled if it - only has one register. */ -#ifndef CLASS_LIKELY_SPILLED_P -#define CLASS_LIKELY_SPILLED_P(CLASS) (reg_class_size[(int) (CLASS)] == 1) -#endif - -/* Select a register mode required for caller save of hard regno REGNO. */ -#ifndef HARD_REGNO_CALLER_SAVE_MODE -#define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS) \ - choose_hard_reg_mode (REGNO, NREGS) -#endif - -/* Registers that get partially clobbered by a call in a given mode. - These must not be call used registers. */ -#ifndef HARD_REGNO_CALL_PART_CLOBBERED -#define HARD_REGNO_CALL_PART_CLOBBERED(REGNO, MODE) 0 -#endif - -/* Allocate reg_n_info tables */ -extern void allocate_reg_info PROTO((size_t, int, int)); |