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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/regs.h')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/regs.h | 243 |
1 files changed, 0 insertions, 243 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/regs.h b/gcc-4.2.1-5666.3/gcc/regs.h deleted file mode 100644 index ee074b9ed..000000000 --- a/gcc-4.2.1-5666.3/gcc/regs.h +++ /dev/null @@ -1,243 +0,0 @@ -/* Define per-register tables for data flow info and register allocation. - Copyright (C) 1987, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2003, 2004 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 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, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ - -#ifndef GCC_REGS_H -#define GCC_REGS_H - -#include "varray.h" -#include "obstack.h" -#include "hard-reg-set.h" -#include "basic-block.h" - -#define REG_BYTES(R) mode_size[(int) GET_MODE (R)] - -/* When you only have the mode of a pseudo register before it has a hard - register chosen for it, this reports the size of each hard register - a pseudo in such a mode would get allocated to. A target may - override this. */ - -#ifndef REGMODE_NATURAL_SIZE -#define REGMODE_NATURAL_SIZE(MODE) UNITS_PER_WORD -#endif - -#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) */ - - /* fields set by reg_scan & 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 freq; /* # estimated frequency (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 throw_calls_crossed; /* # of calls that may throw (REG n) is live across */ - int basic_block; /* # of basic blocks (REG n) is used in */ -} reg_info; - -typedef reg_info *reg_info_p; - -DEF_VEC_P(reg_info_p); -DEF_VEC_ALLOC_P(reg_info_p,heap); - -extern VEC(reg_info_p,heap) *reg_n_info; - -/* Indexed by n, gives number of times (REG n) is used or set. */ - -#define REG_N_REFS(N) (VEC_index (reg_info_p, reg_n_info, N)->refs) - -/* Estimate frequency of references to register N. */ - -#define REG_FREQ(N) (VEC_index (reg_info_p, reg_n_info, N)->freq) - -/* The weights for each insn varries from 0 to REG_FREQ_BASE. - This constant does not need to be high, as in infrequently executed - regions we want to count instructions equivalently to optimize for - size instead of speed. */ -#define REG_FREQ_MAX 1000 - -/* Compute register frequency from the BB frequency. When optimizing for size, - or profile driven feedback is available and the function is never executed, - frequency is always equivalent. Otherwise rescale the basic block - frequency. */ -#define REG_FREQ_FROM_BB(bb) (optimize_size \ - || (flag_branch_probabilities \ - && !ENTRY_BLOCK_PTR->count) \ - ? REG_FREQ_MAX \ - : ((bb)->frequency * REG_FREQ_MAX / BB_FREQ_MAX)\ - ? ((bb)->frequency * REG_FREQ_MAX / BB_FREQ_MAX)\ - : 1) - -/* 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) (VEC_index (reg_info_p, 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) (VEC_index (reg_info_p, reg_n_info, N)->deaths) - -/* 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) \ - (VEC_index (reg_info_p, reg_n_info, N)->calls_crossed) - -/* Indexed by N, gives number of CALL_INSNS that may throw, across which - (REG n) is live. */ - -#define REG_N_THROWING_CALLS_CROSSED(N) \ - (VEC_index (reg_info_p, reg_n_info, N)->throw_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) \ - (VEC_index (reg_info_p, 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]; - -/* Like regs_ever_live, but saying whether reg is set by asm statements. */ - -extern char regs_asm_clobbered[FIRST_PSEUDO_REGISTER]; - -/* Vector indexed by machine mode saying whether there are regs of that mode. */ - -extern bool have_regs_of_mode [MAX_MACHINE_MODE]; - -/* 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) (VEC_index (reg_info_p, 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) (VEC_index (reg_info_p, reg_n_info, N)->last_uid) - -/* 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; - -/* 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, MODE) \ - choose_hard_reg_mode (REGNO, NREGS, false) -#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 (size_t, int, int); - -/* Specify number of hard registers given machine mode occupy. */ -extern unsigned char hard_regno_nregs[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE]; - -#endif /* GCC_REGS_H */ |