gcc/halfpic.h

   1 /* OSF/rose half-pic support definitions.
   2    Copyright (C) 1992 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #ifndef NO_HALF_PIC
  21
  22 /* Add prototype support.  */
  23 #ifndef PROTO
  24 #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__)
  25 #define PROTO(ARGS) ARGS
  26 #else
  27 #define PROTO(ARGS) ()
  28 #endif
  29 #endif
  30
  31 #ifndef STDIO_PROTO
  32 #ifdef BUFSIZ
  33 #define STDIO_PROTO(ARGS) PROTO(ARGS)
  34 #else
  35 #define STDIO_PROTO(ARGS) ()
  36 #endif
  37 #endif
  38
  39 #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__)
  40 union tree_node;                /* forward reference */
  41 struct rtx_def;
  42 #endif
  43
  44 /* Declare the variable flag_half_pic as 'int' instead of 'extern
  45    int', so that BSS variables are created (even though this is not
  46    strict ANSI).  This is because rtl.c now refers to the
  47    CONSTANT_ADDRESS_P macro, which in turn refers to flag_half_pic,
  48    and wants to call half_pic_address_p, whose address we also store
  49    in in a BSS variable.  This way, the gen* programs won't get
  50    unknown symbol errors when being linked (flag_half_pic will never
  51    be true in the gen* programs).  */
  52
  53 int flag_half_pic;                      /* Global half-pic flag.  */
  54 int (*ptr_half_pic_address_p) ();       /* ptr to half_pic_address_p () */
  55
  56 extern int  half_pic_number_ptrs;                               /* # distinct pointers found */
  57 extern int  half_pic_number_refs;                               /* # half-pic references */
  58 extern void half_pic_encode PROTO((union tree_node *));         /* encode whether half-pic */
  59 extern void half_pic_declare PROTO((char *));                   /* declare object local */
  60 extern void half_pic_init PROTO((void));                        /* half_pic initialization */
  61 extern void half_pic_finish STDIO_PROTO((FILE *));              /* half_pic termination */
  62 extern int  half_pic_address_p PROTO((struct rtx_def *));       /* true if an address is half-pic */
  63 extern struct rtx_def *half_pic_ptr PROTO((struct rtx_def *));  /* return RTX for half-pic pointer */
  64
  65 /* Macros to provide access to the half-pic stuff (so they can easily
  66    be stubbed out.  */
  67
  68 #define HALF_PIC_P()            (flag_half_pic)
  69 #define HALF_PIC_NUMBER_PTRS    (half_pic_number_ptrs)
  70 #define HALF_PIC_NUMBER_REFS    (half_pic_number_refs)
  71
  72 #define HALF_PIC_ENCODE(DECL)   half_pic_encode (DECL)
  73 #define HALF_PIC_DECLARE(NAME)  half_pic_declare (NAME)
  74 #define HALF_PIC_INIT()         half_pic_init ()
  75 #define HALF_PIC_FINISH(STREAM) half_pic_finish (STREAM)
  76 #define HALF_PIC_ADDRESS_P(X)   ((*ptr_half_pic_address_p) (X))
  77 #define HALF_PIC_PTR(X)         half_pic_ptr (X)
  78
  79 /* Prefix for half-pic names */
  80 #ifndef HALF_PIC_PREFIX
  81 #define HALF_PIC_PREFIX "__pic_"
  82 #endif
  83
  84 #endif /* NO_HALF_PIC */