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 "langhooks.h"
  34 #include "tree-mudflap.h"
  35 #include "tree-pass.h"
  36 #include "ggc.h"
  37 #include "toplev.h"
  38
  39
  40
  41 /* This file contains placeholder functions, to be used only for
  42    language processors that cannot handle tree-mudflap.c directly.
  43    (e.g. Fortran).  */
  44
  45 static void
  46 nogo (void)
  47 {
  48   internal_error ("mudflap: this language is not supported");
  49 }
  50
  51 void
  52 mudflap_enqueue_decl (tree obj ATTRIBUTE_UNUSED)
  53 {
  54   nogo ();
  55 }
  56
  57 void
  58 mudflap_enqueue_constant (tree obj ATTRIBUTE_UNUSED)
  59 {
  60   nogo ();
  61 }
  62
  63 void
  64 mudflap_finish_file (void)
  65 {
  66   nogo ();
  67 }
  68
  69 int
  70 mf_marked_p (tree t ATTRIBUTE_UNUSED)
  71 {
  72   nogo ();
  73   return 0;
  74 }
  75
  76 tree
  77 mf_mark (tree t ATTRIBUTE_UNUSED)
  78 {
  79   nogo ();
  80   return NULL;
  81 }
  82
  83 /* The pass structures must exist, but need not do anything.  */
  84
  85 static bool
  86 gate_mudflap (void)
  87 {
  88   return flag_mudflap != 0;
  89 }
  90
  91 struct gimple_opt_pass pass_mudflap_1 =
  92 {
  93  {
  94   GIMPLE_PASS,
  95   "mudflap1",                           /* name */
  96   gate_mudflap,                         /* gate */
  97   NULL,                                 /* execute */
  98   NULL,                                 /* sub */
  99   NULL,                                 /* next */
 100   0,                                    /* static_pass_number */
 101   TV_NONE,                              /* tv_id */
 102   0,                                    /* properties_required */
 103   0,                                    /* properties_provided */
 104   0,                                    /* properties_destroyed */
 105   0,                                    /* todo_flags_start */
 106   0                                     /* todo_flags_finish */
 107  }
 108 };
 109
 110 struct gimple_opt_pass pass_mudflap_2 =
 111 {
 112  {
 113   GIMPLE_PASS,
 114   "mudflap2",                           /* name */
 115   gate_mudflap,                         /* gate */
 116   NULL,                                 /* execute */
 117   NULL,                                 /* sub */
 118   NULL,                                 /* next */
 119   0,                                    /* static_pass_number */
 120   TV_NONE,                              /* tv_id */
 121   0,                                    /* properties_required */
 122   0,                                    /* properties_provided */
 123   0,                                    /* properties_destroyed */
 124   0,                                    /* todo_flags_start */
 125   0                                     /* todo_flags_finish */
 126  }
 127 };
 128
 129 /* Instead of:
 130 #include "gt-tree-mudflap.h"
 131 We prepare a little dummy struct here.
 132 */
 133
 134 EXPORTED_CONST struct ggc_root_tab gt_ggc_r_gt_tree_mudflap_h[] = {
 135   LAST_GGC_ROOT_TAB
 136 };