gcc/tree-nomudflap.c

   1 /* Mudflap: narrow-pointer bounds-checking by tree rewriting.
   2    Copyright (C) 2001, 2002, 2003, 2007, 2008, 2009
   3    Free Software Foundation, Inc.
   4    Contributed by Frank Ch. Eigler <fche@redhat.com>
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22
  23 #include "config.h"
  24 #include "system.h"
  25 #include "coretypes.h"
  26 #include "tm.h"
  27 #include "tree.h"
  28 #include "tree-inline.h"
  29 #include "gimple.h"
  30 #include "diagnostic.h"
  31 #include "hashtab.h"
  32 #include "output.h"
  33 #include "varray.h"
  34 #include "langhooks.h"
  35 #include "tree-mudflap.h"
  36 #include "tree-pass.h"
  37 #include "ggc.h"
  38 #include "toplev.h"
  39
  40
  41
  42 /* This file contains placeholder functions, to be used only for
  43    language processors that cannot handle tree-mudflap.c directly.
  44    (e.g. Fortran).  */
  45
  46 static void
  47 nogo (void)
  48 {
  49   internal_error ("mudflap: this language is not supported");
  50 }
  51
  52 void
  53 mudflap_enqueue_decl (tree obj ATTRIBUTE_UNUSED)
  54 {
  55   nogo ();
  56 }
  57
  58 void
  59 mudflap_enqueue_constant (tree obj ATTRIBUTE_UNUSED)
  60 {
  61   nogo ();
  62 }
  63
  64 void
  65 mudflap_finish_file (void)
  66 {
  67   nogo ();
  68 }
  69
  70 int
  71 mf_marked_p (tree t ATTRIBUTE_UNUSED)
  72 {
  73   nogo ();
  74   return 0;
  75 }
  76
  77 tree
  78 mf_mark (tree t ATTRIBUTE_UNUSED)
  79 {
  80   nogo ();
  81   return NULL;
  82 }
  83
  84 /* The pass structures must exist, but need not do anything.  */
  85
  86 static bool
  87 gate_mudflap (void)
  88 {
  89   return flag_mudflap != 0;
  90 }
  91
  92 struct gimple_opt_pass pass_mudflap_1 =
  93 {
  94  {
  95   GIMPLE_PASS,
  96   "mudflap1",                           /* name */
  97   gate_mudflap,                         /* gate */
  98   NULL,                                 /* execute */
  99   NULL,                                 /* sub */
 100   NULL,                                 /* next */
 101   0,                                    /* static_pass_number */
 102   TV_NONE,                              /* tv_id */
 103   0,                                    /* properties_required */
 104   0,                                    /* properties_provided */
 105   0,                                    /* properties_destroyed */
 106   0,                                    /* todo_flags_start */
 107   0                                     /* todo_flags_finish */
 108  }
 109 };
 110
 111 struct gimple_opt_pass pass_mudflap_2 =
 112 {
 113  {
 114   GIMPLE_PASS,
 115   "mudflap2",                           /* name */
 116   gate_mudflap,                         /* gate */
 117   NULL,                                 /* execute */
 118   NULL,                                 /* sub */
 119   NULL,                                 /* next */
 120   0,                                    /* static_pass_number */
 121   TV_NONE,                              /* tv_id */
 122   0,                                    /* properties_required */
 123   0,                                    /* properties_provided */
 124   0,                                    /* properties_destroyed */
 125   0,                                    /* todo_flags_start */
 126   0                                     /* todo_flags_finish */
 127  }
 128 };
 129
 130 /* Instead of:
 131 #include "gt-tree-mudflap.h"
 132 We prepare a little dummy struct here.
 133 */
 134
 135 EXPORTED_CONST struct ggc_root_tab gt_ggc_r_gt_tree_mudflap_h[] = {
 136   LAST_GGC_ROOT_TAB
 137 };