fe7dee4700
GCC-2.6.1 COMES TO FREEBSD-current ---------------------------------- Everybody needs to 'make world'. Oakland, Nov 2nd 1994. In a surprise move this sunny afternoon, the release- engineer for the slightly delayed FreeBSD-2.0, Poul-Henning Kamp (28), decided to pull in the new version 2.6.1 of the GNU C-compiler. The new version of the compiler was release today at noon, and hardly 9 hours later it was committed into the FreeBSD-current source-repository. "It's is simply because we have had too much trouble with the version 2.6.0 of the compiler" Poul-Henning told the FreeBSD-Gazette, "we took a gamble when we decided to use that as our compiler for the 2.0 release, but it seems to pay of in the end now" he concludes. The move has not been discussed on the "core" list at all, and will come as a surprise for most Poul-Hennings peers. "I have only discussed it with Jordan [J. K. Hubbard, the FreeBSD's resident humourist], and we agreed that we needed to do it, so ... I did it!". After a breath he added with a grin: "My email will probably get an all time 'disk-full' now!". This will bring quite a flag-day to the FreeBSD developers, the patch-file is almost 1.4 Megabyte, and they will have to run "make world" to get entirely -current again. "Too bad, but we just had to do this." Was the only comment from Poul-Henning to these problems. When asked how this move would impact the 2.0 release-date, Poul-Hennings face grew dark, he mumbled some very Danish words while he moved his fingers in strange geometrical patterns. Immediately something ecclipsed the Sun, a minor tremor shook the buildings, and the temperature fell significantly. We decided not to pursure the question. ----------- JOB-SECTION ----------- Are you a dedicated GCC-hacker ? We BADLY need somebody to look at the 'freebsd' OS in gcc, sanitize it and carry the patches back to the GNU people. In particular, we need to get out of the "i386-only" spot we are in now. I have the stuff to take a gnu-dist into bmake-form, and will do that part. Please apply to phk@freebsd.org No Novice Need Apply.
237 lines
8.9 KiB
C
237 lines
8.9 KiB
C
/* Communication between reload.c and reload1.c.
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Copyright (C) 1987, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* If secondary reloads are the same for inputs and outputs, define those
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macros here. */
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#ifdef SECONDARY_RELOAD_CLASS
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#define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
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SECONDARY_RELOAD_CLASS (CLASS, MODE, X)
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#define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
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SECONDARY_RELOAD_CLASS (CLASS, MODE, X)
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#endif
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/* If either macro is defined, show that we need secondary reloads. */
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#if defined(SECONDARY_INPUT_RELOAD_CLASS) || defined(SECONDARY_OUTPUT_RELOAD_CLASS)
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#define HAVE_SECONDARY_RELOADS
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#endif
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/* See reload.c and reload1.c for comments on these variables. */
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/* Maximum number of reloads we can need. */
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#define MAX_RELOADS (2 * MAX_RECOG_OPERANDS * (MAX_REGS_PER_ADDRESS + 1))
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extern rtx reload_in[MAX_RELOADS];
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extern rtx reload_out[MAX_RELOADS];
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extern rtx reload_in_reg[MAX_RELOADS];
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extern enum reg_class reload_reg_class[MAX_RELOADS];
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extern enum machine_mode reload_inmode[MAX_RELOADS];
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extern enum machine_mode reload_outmode[MAX_RELOADS];
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extern char reload_optional[MAX_RELOADS];
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extern int reload_inc[MAX_RELOADS];
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extern int reload_opnum[MAX_RELOADS];
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extern int reload_secondary_p[MAX_RELOADS];
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extern int reload_secondary_in_reload[MAX_RELOADS];
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extern int reload_secondary_out_reload[MAX_RELOADS];
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#ifdef MAX_INSN_CODE
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extern enum insn_code reload_secondary_in_icode[MAX_RELOADS];
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extern enum insn_code reload_secondary_out_icode[MAX_RELOADS];
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#endif
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extern int n_reloads;
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extern rtx reload_reg_rtx[MAX_RELOADS];
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/* Encode the usage of a reload. The following codes are supported:
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RELOAD_FOR_INPUT reload of an input operand
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RELOAD_FOR_OUTPUT likewise, for output
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RELOAD_FOR_INSN a reload that must not conflict with anything
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used in the insn, but may conflict with
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something used before or after the insn
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RELOAD_FOR_INPUT_ADDRESS reload for parts of the address of an object
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that is an input reload
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RELOAD_FOR_OUTPUT_ADDRESS likewise, for output reload
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RELOAD_FOR_OPERAND_ADDRESS reload for the address of a non-reloaded
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operand; these don't conflict with
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any other addresses.
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RELOAD_FOR_OPADDR_ADDR reload needed for RELOAD_FOR_OPERAND_ADDRESS
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reloads; usually secondary reloads
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RELOAD_OTHER none of the above, usually multiple uses
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RELOAD_FOR_OTHER_ADDRESS reload for part of the address of an input
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that is marked RELOAD_OTHER.
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This used to be "enum reload_when_needed" but some debuggers have trouble
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with an enum tag and variable of the same name. */
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enum reload_type
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{
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RELOAD_FOR_INPUT, RELOAD_FOR_OUTPUT, RELOAD_FOR_INSN,
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RELOAD_FOR_INPUT_ADDRESS, RELOAD_FOR_OUTPUT_ADDRESS,
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RELOAD_FOR_OPERAND_ADDRESS, RELOAD_FOR_OPADDR_ADDR,
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RELOAD_OTHER, RELOAD_FOR_OTHER_ADDRESS
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};
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extern enum reload_type reload_when_needed[MAX_RELOADS];
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extern rtx *reg_equiv_constant;
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extern rtx *reg_equiv_memory_loc;
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extern rtx *reg_equiv_address;
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extern rtx *reg_equiv_mem;
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/* All the "earlyclobber" operands of the current insn
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are recorded here. */
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extern int n_earlyclobbers;
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extern rtx reload_earlyclobbers[MAX_RECOG_OPERANDS];
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/* Save the number of operands. */
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extern int reload_n_operands;
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/* First uid used by insns created by reload in this function.
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Used in find_equiv_reg. */
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extern int reload_first_uid;
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/* Nonzero if indirect addressing is supported when the innermost MEM is
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of the form (MEM (SYMBOL_REF sym)). It is assumed that the level to
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which these are valid is the same as spill_indirect_levels, above. */
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extern char indirect_symref_ok;
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/* Nonzero if an address (plus (reg frame_pointer) (reg ...)) is valid. */
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extern char double_reg_address_ok;
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#ifdef MAX_INSN_CODE
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/* These arrays record the insn_code of insns that may be needed to
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perform input and output reloads of special objects. They provide a
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place to pass a scratch register. */
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extern enum insn_code reload_in_optab[];
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extern enum insn_code reload_out_optab[];
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#endif
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/* Functions from reload.c: */
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/* Return a memory location that will be used to copy X in mode MODE.
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If we haven't already made a location for this mode in this insn,
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call find_reloads_address on the location being returned. */
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extern rtx get_secondary_mem PROTO((rtx, enum machine_mode,
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int, enum reload_type));
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/* Clear any secondary memory locations we've made. */
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extern void clear_secondary_mem PROTO((void));
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/* Transfer all replacements that used to be in reload FROM to be in
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reload TO. */
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extern void transfer_replacements PROTO((int, int));
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/* Return 1 if ADDR is a valid memory address for mode MODE,
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and check that each pseudo reg has the proper kind of
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hard reg. */
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extern int strict_memory_address_p PROTO((enum machine_mode, rtx));
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/* Like rtx_equal_p except that it allows a REG and a SUBREG to match
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if they are the same hard reg, and has special hacks for
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autoincrement and autodecrement. */
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extern int operands_match_p PROTO((rtx, rtx));
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/* Return the number of times character C occurs in string S. */
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extern int n_occurrences PROTO((int, char *));
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/* Return 1 if altering OP will not modify the value of CLOBBER. */
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extern int safe_from_earlyclobber PROTO((rtx, rtx));
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/* Search the body of INSN for values that need reloading and record them
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with push_reload. REPLACE nonzero means record also where the values occur
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so that subst_reloads can be used. */
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extern void find_reloads PROTO((rtx, int, int, int, short *));
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/* Compute the sum of X and Y, making canonicalizations assumed in an
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address, namely: sum constant integers, surround the sum of two
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constants with a CONST, put the constant as the second operand, and
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group the constant on the outermost sum. */
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extern rtx form_sum PROTO((rtx, rtx));
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/* Substitute into the current INSN the registers into which we have reloaded
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the things that need reloading. */
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extern void subst_reloads PROTO((void));
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/* Make a copy of any replacements being done into X and move those copies
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to locations in Y, a copy of X. We only look at the highest level of
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the RTL. */
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extern void copy_replacements PROTO((rtx, rtx));
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/* If LOC was scheduled to be replaced by something, return the replacement.
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Otherwise, return *LOC. */
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extern rtx find_replacement PROTO((rtx *));
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/* Return nonzero if register in range [REGNO, ENDREGNO)
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appears either explicitly or implicitly in X
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other than being stored into. */
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extern int refers_to_regno_for_reload_p PROTO((int, int, rtx, rtx *));
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/* Nonzero if modifying X will affect IN. */
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extern int reg_overlap_mentioned_for_reload_p PROTO((rtx, rtx));
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/* Return nonzero if anything in X contains a MEM. Look also for pseudo
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registers. */
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extern int refers_to_mem_for_reload_p PROTO((rtx));
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/* Check the insns before INSN to see if there is a suitable register
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containing the same value as GOAL. */
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extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *,
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int, enum machine_mode));
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/* Return 1 if register REGNO is the subject of a clobber in insn INSN. */
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extern int regno_clobbered_p PROTO((int, rtx));
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/* Functions in reload1.c: */
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/* Initialize the reload pass once per compilation. */
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extern void init_reload PROTO((void));
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/* The reload pass itself. */
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extern int reload STDIO_PROTO((rtx, int, FILE *));
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/* Mark the slots in regs_ever_live for the hard regs
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used by pseudo-reg number REGNO. */
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extern void mark_home_live PROTO((int));
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/* Scan X and replace any eliminable registers (such as fp) with a
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replacement (such as sp), plus an offset. */
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extern rtx eliminate_regs PROTO((rtx, enum machine_mode, rtx));
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/* Emit code to perform a reload from IN (which may be a reload register) to
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OUT (which may also be a reload register). IN or OUT is from operand
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OPNUM with reload type TYPE. */
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extern rtx gen_reload PROTO((rtx, rtx, int, enum reload_type));
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/* Functions in caller-save.c: */
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/* Initialize for caller-save. */
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extern void init_caller_save PROTO((void));
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/* Initialize save areas by showing that we haven't allocated any yet. */
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extern void init_save_areas PROTO((void));
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/* Allocate save areas for any hard registers that might need saving. */
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extern int setup_save_areas PROTO((int *));
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/* Find the places where hard regs are live across calls and save them. */
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extern void save_call_clobbered_regs PROTO((enum machine_mode));
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