/* Communication between reload.c and reload1.c.
- Copyright (C) 1987, 91-95, 97, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1997, 1998,
+ 1999, 2000, 2001 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. */
/* If secondary reloads are the same for inputs and outputs, define those
#define MEMORY_MOVE_COST(MODE,CLASS,IN) 4
#endif
#endif
-extern int memory_move_secondary_cost PROTO ((enum machine_mode, enum reg_class, int));
+extern int memory_move_secondary_cost PARAMS ((enum machine_mode, enum reg_class, int));
/* Maximum number of reloads we can need. */
#define MAX_RELOADS (2 * MAX_RECOG_OPERANDS * (MAX_REGS_PER_ADDRESS + 1))
RELOAD_OTHER, RELOAD_FOR_OTHER_ADDRESS
};
-#ifdef MAX_INSN_CODE
+#ifdef GCC_INSN_CODES_H
/* Each reload is recorded with a structure like this. */
struct reload
{
enum machine_mode outmode;
/* The mode of the reload register. */
- enum mode;
+ enum machine_mode mode;
/* the largest number of registers this reload will require. */
- int nregs;
+ unsigned int nregs;
/* Positive amount to increment or decrement by if
reload_in is a PRE_DEC, PRE_INC, POST_DEC, POST_INC.
/* 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. */
+ which these are valid is the same as spill_indirect_levels, above. */
extern char indirect_symref_ok;
extern int num_not_at_initial_offset;
-#ifdef MAX_INSN_CODE
-/* 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[];
-#endif
-
struct needs
{
/* [0] is normal, [1] is nongroup. */
must be examined for register elimination. */
struct insn_chain
{
- /* Links to the neighbour instructions. */
+ /* Links to the neighbor instructions. */
struct insn_chain *next, *prev;
/* Link through a chains set up by calculate_needs_all_insns, containing
/* The rtx of the insn. */
rtx insn;
/* Register life information: record all live hard registers, and all
- live pseudos that have a hard register.
- This information is recorded for the point immediately before the insn
- (in live_before), and for the point within the insn at which all
- outputs have just been written to (in live_after). */
- regset live_before;
- regset live_after;
-
- /* For each class, size of group of consecutive regs
- that is needed for the reloads of this class. */
- char group_size[N_REG_CLASSES];
- /* For each class, the machine mode which requires consecutive
- groups of regs of that class.
- If two different modes ever require groups of one class,
- they must be the same size and equally restrictive for that class,
- otherwise we can't handle the complexity. */
- enum machine_mode group_mode[N_REG_CLASSES];
-
- /* Indicates if a register was counted against the need for
- groups. 0 means it can count against max_nongroup instead. */
- HARD_REG_SET counted_for_groups;
-
- /* Indicates if a register was counted against the need for
- non-groups. 0 means it can become part of a new group.
- During choose_reload_regs, 1 here means don't use this reg
- as part of a group, even if it seems to be otherwise ok. */
- HARD_REG_SET counted_for_nongroups;
+ live pseudos that have a hard register. */
+ regset_head live_throughout;
+ regset_head dead_or_set;
+
+ /* Copies of the global variables computed by find_reloads. */
+ struct reload *rld;
+ int n_reloads;
/* Indicates which registers have already been used for spills. */
HARD_REG_SET used_spill_regs;
extern struct insn_chain *reload_insn_chain;
/* Allocate a new insn_chain structure. */
-extern struct insn_chain *new_insn_chain PROTO((void));
+extern struct insn_chain *new_insn_chain PARAMS ((void));
-extern void compute_use_by_pseudos PROTO((HARD_REG_SET *, regset));
+extern void compute_use_by_pseudos PARAMS ((HARD_REG_SET *, regset));
#endif
/* Functions from reload.c: */
/* Return a memory location that will be used to copy X in mode MODE.
If we haven't already made a location for this mode in this insn,
call find_reloads_address on the location being returned. */
-extern rtx get_secondary_mem PROTO((rtx, enum machine_mode,
+extern rtx get_secondary_mem PARAMS ((rtx, enum machine_mode,
int, enum reload_type));
/* Clear any secondary memory locations we've made. */
-extern void clear_secondary_mem PROTO((void));
+extern void clear_secondary_mem PARAMS ((void));
/* Transfer all replacements that used to be in reload FROM to be in
reload TO. */
-extern void transfer_replacements PROTO((int, int));
+extern void transfer_replacements PARAMS ((int, int));
/* IN_RTX is the value loaded by a reload that we now decided to inherit,
or a subpart of it. If we have any replacements registered for IN_RTX,
- chancel the reloads that were supposed to load them.
- Return non-zero if we chanceled any reloads. */
-extern int remove_address_replacements PROTO((rtx in_rtx));
+ cancel the reloads that were supposed to load them.
+ Return nonzero if we canceled any reloads. */
+extern int remove_address_replacements PARAMS ((rtx in_rtx));
/* Like rtx_equal_p except that it allows a REG and a SUBREG to match
if they are the same hard reg, and has special hacks for
autoincrement and autodecrement. */
-extern int operands_match_p PROTO((rtx, rtx));
+extern int operands_match_p PARAMS ((rtx, rtx));
-/* Return 1 if altering OP will not modify the value of CLOBBER. */
-extern int safe_from_earlyclobber PROTO((rtx, rtx));
+/* Return 1 if altering OP will not modify the value of CLOBBER. */
+extern int safe_from_earlyclobber PARAMS ((rtx, rtx));
/* Search the body of INSN for values that need reloading and record them
with push_reload. REPLACE nonzero means record also where the values occur
so that subst_reloads can be used. */
-extern int find_reloads PROTO((rtx, int, int, int, short *));
+extern int find_reloads PARAMS ((rtx, int, int, int, short *));
/* Compute the sum of X and Y, making canonicalizations assumed in an
address, namely: sum constant integers, surround the sum of two
constants with a CONST, put the constant as the second operand, and
group the constant on the outermost sum. */
-extern rtx form_sum PROTO((rtx, rtx));
+extern rtx form_sum PARAMS ((rtx, rtx));
/* Substitute into the current INSN the registers into which we have reloaded
the things that need reloading. */
-extern void subst_reloads PROTO((void));
+extern void subst_reloads PARAMS ((rtx));
/* Make a copy of any replacements being done into X and move those copies
to locations in Y, a copy of X. We only look at the highest level of
the RTL. */
-extern void copy_replacements PROTO((rtx, rtx));
+extern void copy_replacements PARAMS ((rtx, rtx));
/* Change any replacements being done to *X to be done to *Y */
-extern void move_replacements PROTO((rtx *x, rtx *y));
+extern void move_replacements PARAMS ((rtx *x, rtx *y));
/* If LOC was scheduled to be replaced by something, return the replacement.
Otherwise, return *LOC. */
-extern rtx find_replacement PROTO((rtx *));
+extern rtx find_replacement PARAMS ((rtx *));
/* Return nonzero if register in range [REGNO, ENDREGNO)
appears either explicitly or implicitly in X
other than being stored into. */
-extern int refers_to_regno_for_reload_p PROTO((int, int, rtx, rtx *));
+extern int refers_to_regno_for_reload_p PARAMS ((unsigned int, unsigned int,
+ rtx, rtx *));
/* Nonzero if modifying X will affect IN. */
-extern int reg_overlap_mentioned_for_reload_p PROTO((rtx, rtx));
+extern int reg_overlap_mentioned_for_reload_p PARAMS ((rtx, rtx));
/* Return nonzero if anything in X contains a MEM. Look also for pseudo
registers. */
-extern int refers_to_mem_for_reload_p PROTO((rtx));
+extern int refers_to_mem_for_reload_p PARAMS ((rtx));
/* Check the insns before INSN to see if there is a suitable register
containing the same value as GOAL. */
-extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *,
+extern rtx find_equiv_reg PARAMS ((rtx, rtx, enum reg_class, int, short *,
int, enum machine_mode));
/* Return 1 if register REGNO is the subject of a clobber in insn INSN. */
-extern int regno_clobbered_p PROTO((int, rtx));
+extern int regno_clobbered_p PARAMS ((unsigned int, rtx, enum machine_mode,
+ int));
-/* Functions in reload1.c: */
+/* Return 1 if X is an operand of an insn that is being earlyclobbered. */
+extern int earlyclobber_operand_p PARAMS ((rtx));
-extern int reloads_conflict PROTO ((int, int));
+/* Record one reload that needs to be performed. */
+extern int push_reload PARAMS ((rtx, rtx, rtx *, rtx *, enum reg_class,
+ enum machine_mode, enum machine_mode,
+ int, int, int, enum reload_type));
-int count_occurrences PROTO((rtx, rtx));
+/* Functions in reload1.c: */
+
+extern void reload_cse_regs PARAMS ((rtx));
+extern int reloads_conflict PARAMS ((int, int));
/* Initialize the reload pass once per compilation. */
-extern void init_reload PROTO((void));
+extern void init_reload PARAMS ((void));
/* The reload pass itself. */
-extern int reload PROTO((rtx, int, FILE *));
+extern int reload PARAMS ((rtx, int));
/* Mark the slots in regs_ever_live for the hard regs
used by pseudo-reg number REGNO. */
-extern void mark_home_live PROTO((int));
+extern void mark_home_live PARAMS ((int));
/* Scan X and replace any eliminable registers (such as fp) with a
replacement (such as sp), plus an offset. */
-extern rtx eliminate_regs PROTO((rtx, enum machine_mode, rtx));
+extern rtx eliminate_regs PARAMS ((rtx, enum machine_mode, rtx));
/* Emit code to perform a reload from IN (which may be a reload register) to
OUT (which may also be a reload register). IN or OUT is from operand
OPNUM with reload type TYPE. */
-extern rtx gen_reload PROTO((rtx, rtx, int, enum reload_type));
+extern rtx gen_reload PARAMS ((rtx, rtx, int, enum reload_type));
/* Deallocate the reload register used by reload number R. */
-extern void deallocate_reload_reg PROTO((int r));
+extern void deallocate_reload_reg PARAMS ((int r));
/* Functions in caller-save.c: */
/* Initialize for caller-save. */
-extern void init_caller_save PROTO((void));
+extern void init_caller_save PARAMS ((void));
/* Initialize save areas by showing that we haven't allocated any yet. */
-extern void init_save_areas PROTO((void));
+extern void init_save_areas PARAMS ((void));
/* Allocate save areas for any hard registers that might need saving. */
-extern void setup_save_areas PROTO((void));
+extern void setup_save_areas PARAMS ((void));
/* Find the places where hard regs are live across calls and save them. */
-extern void save_call_clobbered_regs PROTO((void));
+extern void save_call_clobbered_regs PARAMS ((void));
/* Replace (subreg (reg)) with the appropriate (reg) for any operands. */
-extern void cleanup_subreg_operands PROTO ((rtx));
+extern void cleanup_subreg_operands PARAMS ((rtx));
+
+/* Debugging support. */
+extern void debug_reload_to_stream PARAMS ((FILE *));
+extern void debug_reload PARAMS ((void));
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