/* Define per-register tables for data flow info and register allocation.
Copyright (C) 1987, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000 Free Software Foundation, Inc.
+ 1999, 2000, 2003, 2004 Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-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.
+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.
-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.
+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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+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. */
+#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)]
-/* Get the number of consecutive hard regs required to hold the REG or
- SUBREG 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.
-
- A target may override this definition, the case where you would do
- this is where there are registers which are smaller than WORD_SIZE
- such as the SFmode registers on sparc64. */
-
-#ifndef REG_SIZE
-#define REG_SIZE(R) \
- ((mode_size[(int) GET_MODE (R)] + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
-#endif
-
/* 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. Like REG_SIZE, a
- target may override this. */
+ 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
{ /* 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 reg_scan & flow_analysis */
int sets; /* # of times (REG n) is set */
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_mode; /* whether (SUBREG (REG n)) exists and
- is illegal. */
} reg_info;
extern varray_type reg_n_info;
#define REG_FREQ(N) (VARRAY_REG (reg_n_info, N)->freq)
-/* The weights for each insn varries from 0 to REG_FREQ_BASE.
+/* 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_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 mode of the reg in some way
- that is illegal for a given class (usually floating-point)
- of registers. */
-
-#define REG_CHANGES_MODE(N) (VARRAY_REG (reg_n_info, N)->changes_mode)
-
/* Get the number of consecutive words required to hold pseudo-reg N. */
#define PSEUDO_REGNO_SIZE(N) \
extern short *reg_renumber;
-/* Vector indexed by hardware reg
- saying whether that reg is ever used. */
+/* 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. */
+/* Like regs_ever_live, but saying whether reg is set by asm statements. */
-extern const char * reg_names[FIRST_PSEUDO_REGISTER];
+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
#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)
-
/* 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;
/* 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)
+ choose_hard_reg_mode (REGNO, NREGS, false)
#endif
-/* Registers that get partially clobbered by a call in a given mode.
+/* 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 PARAMS ((size_t, int, int));
+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 */
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