/* Communication between reload.c and reload1.c.
Copyright (C) 1987, 1991 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)
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* If secondary reloads are the same for inputs and outputs, define those
#ifdef SECONDARY_RELOAD_CLASS
#define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
SECONDARY_RELOAD_CLASS (CLASS, MODE, X)
#define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
SECONDARY_RELOAD_CLASS (CLASS, MODE, X)
/* If either macro is defined, show that we need secondary reloads. */
#if defined(SECONDARY_INPUT_RELOAD_CLASS) || defined(SECONDARY_OUTPUT_RELOAD_CLASS)
#define HAVE_SECONDARY_RELOADS
/* See reload.c and reload1.c for comments on these variables. */
/* Maximum number of reloads we can need. */
#define MAX_RELOADS (2 * MAX_RECOG_OPERANDS * (MAX_REGS_PER_ADDRESS + 1))
extern rtx reload_in
[MAX_RELOADS
];
extern rtx reload_out
[MAX_RELOADS
];
extern rtx reload_in_reg
[MAX_RELOADS
];
extern enum reg_class reload_reg_class
[MAX_RELOADS
];
extern enum machine_mode reload_inmode
[MAX_RELOADS
];
extern enum machine_mode reload_outmode
[MAX_RELOADS
];
extern char reload_strict_low
[MAX_RELOADS
];
extern char reload_optional
[MAX_RELOADS
];
extern int reload_inc
[MAX_RELOADS
];
extern int reload_needed_for_multiple
[MAX_RELOADS
];
extern rtx reload_needed_for
[MAX_RELOADS
];
extern int reload_secondary_reload
[MAX_RELOADS
];
extern int reload_secondary_p
[MAX_RELOADS
];
extern enum insn_code reload_secondary_icode
[MAX_RELOADS
];
extern rtx reload_reg_rtx
[MAX_RELOADS
];
RELOAD_FOR_INPUT_RELOAD_ADDRESS
,
RELOAD_FOR_OUTPUT_RELOAD_ADDRESS
,
RELOAD_FOR_OPERAND_ADDRESS
,
/* The following two are not fully implemented.
They are used in emitting insns, but they aren't distinguished from
RELOAD_OTHER when computing the number of spills. What they accomplish
is to avoid precluding inheritance of already loaded values
for input reloads when there are also output reloads. */
extern enum reload_when_needed reload_when_needed
[MAX_RELOADS
];
extern rtx
*reg_equiv_constant
;
extern rtx
*reg_equiv_memory_loc
;
extern rtx
*reg_equiv_address
;
extern rtx
*reg_equiv_mem
;
/* All the "earlyclobber" operands of the current insn
extern int n_earlyclobbers
;
extern rtx reload_earlyclobbers
[MAX_RECOG_OPERANDS
];
/* First uid used by insns created by reload in this function.
Used in find_equiv_reg. */
extern int reload_first_uid
;
/* Nonzero if indirect addressing is supported when the innermost MEM is
of the form (MEM (SYMBOL_REF sym)). It is assumed that the level to
which these are valid is the same as spill_indirect_levels, above. */
extern char indirect_symref_ok
;
/* Nonzero if an address (plus (reg frame_pointer) (reg ...)) is valid. */
extern char double_reg_address_ok
;
/* These arrays record the insn_code of insns that may be needed to
perform input and output reloads of special objects. They provide a
place to pass a scratch register. */
extern enum insn_code reload_in_optab
[];
extern enum insn_code reload_out_optab
[];
extern void init_reload ();
extern void find_reloads ();
extern void subst_reloads ();
extern rtx
get_secondary_mem ();
extern rtx
eliminate_regs ();
extern rtx
gen_input_reload ();
extern rtx
find_replacement ();