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tree-ssa-loop-niter.h revision 1.3 
      1 /* Header file for loop interation estimates.
      2    Copyright (C) 2013-2017 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 3, 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 COPYING3.  If not see
     18 <http://www.gnu.org/licenses/>.  */
     19 
     20 #ifndef GCC_TREE_SSA_LOOP_NITER_H
     21 #define GCC_TREE_SSA_LOOP_NITER_H
     22 
     23 extern tree expand_simple_operations (tree, tree = NULL);
     24 extern tree simplify_using_initial_conditions (struct loop *, tree);
     25 extern bool loop_only_exit_p (const struct loop *, const_edge);
     26 extern bool number_of_iterations_exit (struct loop *, edge,
     27 				       struct tree_niter_desc *niter, bool,
     28 				       bool every_iteration = true);
     29 extern bool number_of_iterations_exit_assumptions (struct loop *, edge,
     30 						   struct tree_niter_desc *,
     31 						   gcond **, bool = true);
     32 extern tree find_loop_niter (struct loop *, edge *);
     33 extern bool finite_loop_p (struct loop *);
     34 extern tree loop_niter_by_eval (struct loop *, edge);
     35 extern tree find_loop_niter_by_eval (struct loop *, edge *);
     36 extern bool estimated_loop_iterations (struct loop *, widest_int *);
     37 extern HOST_WIDE_INT estimated_loop_iterations_int (struct loop *);
     38 extern bool max_loop_iterations (struct loop *, widest_int *);
     39 extern HOST_WIDE_INT max_loop_iterations_int (struct loop *);
     40 extern bool likely_max_loop_iterations (struct loop *, widest_int *);
     41 extern HOST_WIDE_INT likely_max_loop_iterations_int (struct loop *);
     42 extern HOST_WIDE_INT max_stmt_executions_int (struct loop *);
     43 extern HOST_WIDE_INT likely_max_stmt_executions_int (struct loop *);
     44 extern HOST_WIDE_INT estimated_stmt_executions_int (struct loop *);
     45 extern bool max_stmt_executions (struct loop *, widest_int *);
     46 extern bool likely_max_stmt_executions (struct loop *, widest_int *);
     47 extern bool estimated_stmt_executions (struct loop *, widest_int *);
     48 extern void estimate_numbers_of_iterations (void);
     49 extern bool stmt_dominates_stmt_p (gimple *, gimple *);
     50 extern bool nowrap_type_p (tree);
     51 extern bool scev_probably_wraps_p (tree, tree, tree, gimple *,
     52 				   struct loop *, bool);
     53 extern void free_loop_control_ivs (struct loop *);
     54 extern void free_numbers_of_iterations_estimates_loop (struct loop *);
     55 extern void free_numbers_of_iterations_estimates (function *);
     56 extern void substitute_in_loop_info (struct loop *, tree, tree);
     57 
     58 #endif /* GCC_TREE_SSA_LOOP_NITER_H */
     59