contrib/gcc-3.4/gcc/predict.h

   1 /* Definitions for branch prediction routines in the GNU compiler.
   2    Copyright (C) 2001, 2003 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 #define DEF_PREDICTOR(ENUM, NAME, HITRATE, FLAGS) ENUM,
  22 enum br_predictor
  23 {
  24 #include "predict.def"
  25
  26   /* Upper bound on non-language-specific builtins.  */
  27   END_PREDICTORS
  28 };
  29 #undef DEF_PREDICTOR
  30 enum prediction
  31 {
  32    NOT_TAKEN,
  33    TAKEN
  34 };
  35
  36 /* Flags for NOTE_PREDICTION */
  37 #define IS_TAKEN 1              /* Predict edges to the block as taken.  */
  38
  39 extern void predict_insn_def (rtx, enum br_predictor, enum prediction);
  40 extern void predict_insn (rtx, enum br_predictor, int);
  41
  42 /* Avoid unneeded dependency on basic_block.h.  */
  43 #ifdef BASIC_BLOCK
  44 extern void predict_edge (edge, enum br_predictor, int);
  45 extern void predict_edge_def (edge, enum br_predictor, enum prediction);
  46 #endif