gcc/halfpic.h

   1 /* OSF/rose half-pic support definitions.
   2    Copyright (C) 1992, 1996, 1997, 1998 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef NO_HALF_PIC
  22
  23 #ifdef ANSI_PROTOTYPES
  24 union tree_node;                /* forward reference */
  25 struct rtx_def;
  26 #endif
  27
  28 /* Declare the variable flag_half_pic as 'int' instead of 'extern
  29    int', so that BSS variables are created (even though this is not
  30    strict ANSI).  This is because rtl.c now refers to the
  31    CONSTANT_ADDRESS_P macro, which in turn refers to flag_half_pic,
  32    and wants to call half_pic_address_p, whose address we also store
  33    in a BSS variable.  This way, the gen* programs won't get
  34    unknown symbol errors when being linked (flag_half_pic will never
  35    be true in the gen* programs).  */
  36
  37 int flag_half_pic;                      /* Global half-pic flag.  */
  38 int (*ptr_half_pic_address_p) ();       /* ptr to half_pic_address_p () */
  39
  40 extern int  half_pic_number_ptrs;                               /* # distinct pointers found */
  41 extern int  half_pic_number_refs;                               /* # half-pic references */
  42 extern void half_pic_encode PROTO((union tree_node *));         /* encode whether half-pic */
  43 extern void half_pic_declare PROTO((char *));                   /* declare object local */
  44 extern void half_pic_external PROTO((char *));                  /* declare object external */
  45 extern void half_pic_init PROTO((void));                        /* half_pic initialization */
  46 extern int  half_pic_address_p PROTO((struct rtx_def *));       /* true if an address is half-pic */
  47 extern struct rtx_def *half_pic_ptr PROTO((struct rtx_def *));  /* return RTX for half-pic pointer */
  48 /* Can't use prototype since FILE isn't defined yet.  */
  49 extern void half_pic_finish (/* FILE * */);             /* half_pic termination */
  50
  51 /* Macros to provide access to the half-pic stuff (so they can easily
  52    be stubbed out.  */
  53
  54 #define HALF_PIC_P()            (flag_half_pic)
  55 #define HALF_PIC_NUMBER_PTRS    (half_pic_number_ptrs)
  56 #define HALF_PIC_NUMBER_REFS    (half_pic_number_refs)
  57
  58 #define HALF_PIC_ENCODE(DECL)   half_pic_encode (DECL)
  59 #define HALF_PIC_DECLARE(NAME)  half_pic_declare (NAME)
  60 #define HALF_PIC_EXTERNAL(NAME) half_pic_external (NAME)
  61 #define HALF_PIC_INIT()         half_pic_init ()
  62 #define HALF_PIC_FINISH(STREAM) half_pic_finish (STREAM)
  63 #define HALF_PIC_ADDRESS_P(X)   ((*ptr_half_pic_address_p) (X))
  64 #define HALF_PIC_PTR(X)         half_pic_ptr (X)
  65
  66 /* Prefix for half-pic names */
  67 #ifndef HALF_PIC_PREFIX
  68 #define HALF_PIC_PREFIX "__pic_"
  69 #endif
  70
  71 #endif /* NO_HALF_PIC */