gcc/cfghooks.h

   1 /* Hooks for cfg representation specific functions.
   2    Copyright (C) 2003 Free Software Foundation, Inc.
   3    Contributed by Sebastian Pop <s.pop@laposte.net>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef GCC_CFGHOOKS_H
  23 #define GCC_CFGHOOKS_H
  24
  25 struct cfg_hooks
  26 {
  27   /* Debugging.  Do not use macros to hook these so they can be called from
  28      debugger!  */
  29   int (*cfgh_verify_flow_info)          PARAMS ((void));
  30   void (*dump_bb)                       PARAMS ((basic_block, FILE *));
  31
  32   /* Basic CFG manipulation.  */
  33
  34   /* Redirect edge E to the given basic block B and update underlying program
  35      representation.  Returns false when edge is not easilly redirectable for
  36      whatever reason.  */
  37   bool (*redirect_edge_and_branch)      PARAMS ((edge e, basic_block b));
  38
  39   /* Same as the above but allows redirecting of fallthru edges.  In that case
  40      newly created forwarder basic block is returned.  It aborts when called
  41      on abnormal edge.  */
  42   basic_block (*redirect_edge_and_branch_force)PARAMS ((edge, basic_block));
  43
  44   /* Remove given basic block and all edges possibly pointing into it.  */
  45   void (*delete_block)PARAMS ((basic_block));
  46
  47   /* Split basic block B after specified instruction I.  */
  48   edge (*split_block)                   PARAMS ((basic_block b, void * i));
  49
  50   /* Higher level functions representable by primitive operations above if
  51      we didn't have some oddities in RTL and Tree representations.  */
  52   basic_block (*cfgh_split_edge)        PARAMS ((edge));
  53 };
  54
  55 #define redirect_edge_and_branch(e,b)        cfg_hooks->redirect_edge_and_branch (e,b)
  56 #define redirect_edge_and_branch_force(e,b)  cfg_hooks->redirect_edge_and_branch_force (e,b)
  57 #define split_block(e,i)                     cfg_hooks->split_block (e,i)
  58 #define delete_block(b)                      cfg_hooks->delete_block (b)
  59 #define split_edge(e)                        cfg_hooks->cfgh_split_edge (e)
  60
  61 /* Hooks containers.  */
  62 extern struct cfg_hooks rtl_cfg_hooks;
  63
  64 /* A pointer to one of the hooks containers.  */
  65 extern struct cfg_hooks *cfg_hooks;
  66
  67 /* Declarations.  */
  68 extern void rtl_register_cfg_hooks     PARAMS ((void));
  69 extern void cfg_layout_rtl_register_cfg_hooks PARAMS ((void));
  70
  71 #endif  /* GCC_CFGHOOKS_H */