gcc/coretypes.h

   1 /* GCC core type declarations.
   2    Copyright (C) 2002, 2004 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to the Free
  18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  20
  21 /* Provide forward declarations of core types which are referred to by
  22    most of the compiler.  This allows header files to use these types
  23    (e.g. in function prototypes) without concern for whether the full
  24    definitions are visible.  Some other declarations that need to be
  25    universally visible are here, too.
  26
  27    In the context of tconfig.h, most of these have special definitions
  28    which prevent them from being used except in further type
  29    declarations.  This is a kludge; the right thing is to avoid
  30    including the "tm.h" header set in the context of tconfig.h, but
  31    we're not there yet.  */
  32
  33 #ifndef GCC_CORETYPES_H
  34 #define GCC_CORETYPES_H
  35
  36 #define GTY(x)  /* nothing - marker for gengtype */
  37
  38 #ifndef USED_FOR_TARGET
  39
  40 struct rtx_def;
  41 typedef struct rtx_def *rtx;
  42 struct rtvec_def;
  43 typedef struct rtvec_def *rtvec;
  44 union tree_node;
  45 typedef union tree_node *tree;
  46
  47 /* Provide forward struct declaration so that we don't have to include
  48    all of cpplib.h whenever a random prototype includes a pointer.
  49    Note that the cpp_reader typedef remains part of cpplib.h.  */
  50
  51 struct cpp_reader;
  52
  53 /* The thread-local storage model associated with a given VAR_DECL
  54    or SYMBOL_REF.  This isn't used much, but both trees and RTL refer
  55    to it, so it's here.  */
  56 enum tls_model {
  57   TLS_MODEL_GLOBAL_DYNAMIC = 1,
  58   TLS_MODEL_LOCAL_DYNAMIC,
  59   TLS_MODEL_INITIAL_EXEC,
  60   TLS_MODEL_LOCAL_EXEC
  61 };
  62
  63 #else
  64
  65 struct _dont_use_rtx_here_;
  66 struct _dont_use_rtvec_here_;
  67 union _dont_use_tree_here_;
  68 #define rtx struct _dont_use_rtx_here_ *
  69 #define rtvec struct _dont_use_rtvec_here *
  70 #define tree union _dont_use_tree_here_ *
  71
  72 #endif
  73
  74 #endif /* coretypes.h */
  75