Restore original scattering when the transform is not legal.

[pf3gnuchains/gcc-fork.git] / gcc / recog.h

diff --git a/gcc/recog.h b/gcc/recog.h
index b10b161..4dce8d9 100644 (file)
--- a/gcc/recog.h
+++ b/gcc/recog.h
@@ -1,12 +1,12 @@
 /* Declarations for interface to insn recognizer and insn-output.c.
 /* Declarations for interface to insn recognizer and insn-output.c.

-   Copyright (C) 1987, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005
-   Free Software Foundation, Inc.
+   Copyright (C) 1987, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004,
+   2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.

 
 This file is part of GCC.
 
 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
 
 This file is part of GCC.
 
 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
+Software Foundation; either version 3, or (at your option) any later

 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY


@@ -15,9 +15,8 @@ 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
 for more details.
 
 You should have received a copy of the GNU General Public License

-along with GCC; see the file COPYING.  If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA.  */
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */

 
 /* Random number that should be large enough for all purposes.  */
 #define MAX_RECOG_ALTERNATIVES 30
 
 /* Random number that should be large enough for all purposes.  */
 #define MAX_RECOG_ALTERNATIVES 30


@@ -51,7 +50,8 @@ struct operand_alternative
 
   /* Nonzero if '&' was found in the constraint string.  */
   unsigned int earlyclobber:1;
 
   /* Nonzero if '&' was found in the constraint string.  */
   unsigned int earlyclobber:1;

-  /* Nonzero if 'm' was found in the constraint string.  */
+  /* Nonzero if TARGET_MEM_CONSTRAINT was found in the constraint
+     string.  */

   unsigned int memory_ok:1;
   /* Nonzero if 'o' was found in the constraint string.  */
   unsigned int offmem_ok:1;
   unsigned int memory_ok:1;
   /* Nonzero if 'o' was found in the constraint string.  */
   unsigned int offmem_ok:1;


@@ -72,9 +72,10 @@ struct operand_alternative
 extern void init_recog (void);
 extern void init_recog_no_volatile (void);
 extern int check_asm_operands (rtx);
 extern void init_recog (void);
 extern void init_recog_no_volatile (void);
 extern int check_asm_operands (rtx);

-extern int asm_operand_ok (rtx, const char *);
-extern int validate_change (rtx, rtx *, rtx, int);
-extern int validate_change_maybe_volatile (rtx, rtx *, rtx);
+extern int asm_operand_ok (rtx, const char *, const char **);
+extern bool validate_change (rtx, rtx *, rtx, bool);
+extern bool validate_unshare_change (rtx, rtx *, rtx, bool);
+extern bool canonicalize_change_group (rtx insn, rtx x);

 extern int insn_invalid_p (rtx);
 extern int verify_changes (int);
 extern void confirm_change_group (void);
 extern int insn_invalid_p (rtx);
 extern int verify_changes (int);
 extern void confirm_change_group (void);


@@ -85,15 +86,18 @@ extern int constrain_operands (int);
 extern int constrain_operands_cached (int);
 extern int memory_address_p (enum machine_mode, rtx);
 extern int strict_memory_address_p (enum machine_mode, rtx);
 extern int constrain_operands_cached (int);
 extern int memory_address_p (enum machine_mode, rtx);
 extern int strict_memory_address_p (enum machine_mode, rtx);

+extern int validate_replace_rtx_subexp (rtx, rtx, rtx, rtx *);

 extern int validate_replace_rtx (rtx, rtx, rtx);
 extern int validate_replace_rtx (rtx, rtx, rtx);

+extern int validate_replace_rtx_part (rtx, rtx, rtx *, rtx);
+extern int validate_replace_rtx_part_nosimplify (rtx, rtx, rtx *, rtx);

 extern void validate_replace_rtx_group (rtx, rtx, rtx);
 extern void validate_replace_src_group (rtx, rtx, rtx);
 extern void validate_replace_rtx_group (rtx, rtx, rtx);
 extern void validate_replace_src_group (rtx, rtx, rtx);

+extern bool validate_simplify_insn (rtx insn);

 extern int num_changes_pending (void);
 #ifdef HAVE_cc0
 extern int next_insn_tests_no_inequality (rtx);
 #endif
 extern int reg_fits_class_p (rtx, enum reg_class, int, enum machine_mode);
 extern int num_changes_pending (void);
 #ifdef HAVE_cc0
 extern int next_insn_tests_no_inequality (rtx);
 #endif
 extern int reg_fits_class_p (rtx, enum reg_class, int, enum machine_mode);

-extern rtx *find_single_use (rtx, rtx, rtx *);

 
 extern int offsettable_memref_p (rtx);
 extern int offsettable_nonstrict_memref_p (rtx);
 
 extern int offsettable_memref_p (rtx);
 extern int offsettable_nonstrict_memref_p (rtx);


@@ -142,6 +146,19 @@ recog_memoized (rtx insn)
 }
 #endif
 
 }
 #endif
 

+/* Skip chars until the next ',' or the end of the string.  This is
+   useful to skip alternatives in a constraint string.  */
+static inline const char *
+skip_alternative (const char *p)
+{
+  const char *r = p;
+  while (*r != '\0' && *r != ',')
+    r++;
+  if (*r == ',')
+    r++;
+  return r;
+}
+

 /* Nonzero means volatile operands are recognized.  */
 extern int volatile_ok;
 
 /* Nonzero means volatile operands are recognized.  */
 extern int volatile_ok;
 


@@ -201,6 +218,12 @@ struct recog_data
   /* The number of alternatives in the constraints for the insn.  */
   char n_alternatives;
 
   /* The number of alternatives in the constraints for the insn.  */
   char n_alternatives;
 

+  /* Specifies whether an insn alternative is enabled using the
+     `enabled' attribute in the insn pattern definition.  For back
+     ends not using the `enabled' attribute the array fields are
+     always set to `true' in expand_insn.  */
+  bool alternative_enabled_p [MAX_RECOG_ALTERNATIVES];
+

   /* In case we are caching, hold insn data was generated for.  */
   rtx insn;
 };
   /* In case we are caching, hold insn data was generated for.  */
   rtx insn;
 };