2398fb2aea
* config/alpha/osf.h: Standarize copyright statement. * config/arc/arc.h: Likewise. * config/arm/elf.h config/arm/coff.h config/arm/aout.h: Likewise. * config/arm/arm.c config/arm/arm.h: Likewise. * config/elxsi/elxsi.h: Likewise. * config/i386/sco.h: Likewise. * config/m68k/crds.h config/m68k/hp320.h config/m68k/lynx.h: Likewise. * config/m68k/m68kv4.h config/m68k/next21.h: Likewise. * config/m68k/sun3.h: Likewise. * config/m88k/dgux.h config/m88k/dguxbcs.h: Likewise. * config/pdp11/2bsd.h config/pdp11/pdp11.h: Likewise. * config/romp/romp.h: Likewise. * config/rs6000/aix41.h: Likewise. * config/sparc/sysv4.h: Likewise. * config/we32k/we32k.c config/we32k/we32k.h: Likewise. * fixinc/gnu-regex.c fixinc/gnu-regex.h: Likewise. * cpplib.h cppexp.c cselib.h profile.c: Likewise. * longlong.h: Likewise. * libgcc2.c: Likewise. From-SVN: r38088
68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
/* Common subexpression elimination for GNU compiler.
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Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
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1999 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, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Describe a value. */
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typedef struct cselib_val_struct
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{
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/* The hash value. */
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unsigned int value;
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union
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{
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/* A VALUE rtx that points back to this structure. */
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rtx val_rtx;
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/* Used to keep a list of free cselib_val structures. */
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struct cselib_val_struct *next_free;
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} u;
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/* All rtl expressions that hold this value at the current time during a
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scan. */
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struct elt_loc_list *locs;
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/* If this value is used as an address, points to a list of values that
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use it as an address in a MEM. */
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struct elt_list *addr_list;
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} cselib_val;
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/* A list of rtl expressions that hold the same value. */
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struct elt_loc_list
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{
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/* Next element in the list. */
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struct elt_loc_list *next;
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/* An rtl expression that holds the value. */
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rtx loc;
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/* The insn that made the equivalence. */
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rtx setting_insn;
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};
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/* A list of cselib_val structures. */
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struct elt_list
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{
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struct elt_list *next;
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cselib_val *elt;
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};
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extern cselib_val *cselib_lookup PARAMS ((rtx, enum machine_mode, int));
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extern void cselib_update_varray_sizes PARAMS ((void));
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extern void cselib_init PARAMS ((void));
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extern void cselib_finish PARAMS ((void));
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extern void cselib_process_insn PARAMS ((rtx));
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extern int rtx_equal_for_cselib_p PARAMS ((rtx, rtx));
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extern int references_value_p PARAMS ((rtx, int));
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