tree-ssa-loop-niter.h

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/* Header file for loop iteration estimates.
   Copyright (C) 2013-2026 Free Software Foundation, Inc.
 
This file is part of GCC.
 
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
 
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
 
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */
 
#ifndef GCC_TREE_SSA_LOOP_NITER_H
#define GCC_TREE_SSA_LOOP_NITER_H
 
extern tree expand_simple_operations (tree, tree = NULL);
extern tree simplify_using_initial_conditions (class loop *, tree);
extern bool loop_only_exit_p (const class loop *, basic_block *body,
                              const_edge);
extern bool number_of_iterations_exit (class loop *, edge,
                                       class tree_niter_desc *niter, bool,
                                       bool every_iteration = true,
                                       basic_block * = NULL);
extern bool number_of_iterations_exit_assumptions (class loop *, edge,
                                                   class tree_niter_desc *,
                                                   gcond **, bool = true,
                                                   basic_block * = NULL);
extern tree find_loop_niter (class loop *, edge *);
extern bool finite_loop_p (class loop *);
extern tree loop_niter_by_eval (class loop *, edge);
extern tree find_loop_niter_by_eval (class loop *, edge *);
extern bool estimated_loop_iterations (class loop *, widest_int *);
extern HOST_WIDE_INT estimated_loop_iterations_int (class loop *);
extern bool max_loop_iterations (class loop *, widest_int *);
extern HOST_WIDE_INT max_loop_iterations_int (class loop *);
extern bool likely_max_loop_iterations (class loop *, widest_int *);
extern HOST_WIDE_INT likely_max_loop_iterations_int (class loop *);
extern HOST_WIDE_INT max_stmt_executions_int (class loop *);
extern HOST_WIDE_INT likely_max_stmt_executions_int (class loop *);
extern HOST_WIDE_INT estimated_stmt_executions_int (class loop *);
extern bool max_stmt_executions (class loop *, widest_int *);
extern bool likely_max_stmt_executions (class loop *, widest_int *);
extern bool estimated_stmt_executions (class loop *, widest_int *);
extern void estimate_numbers_of_iterations (function *);
extern void estimate_numbers_of_iterations (class loop *);
extern bool stmt_dominates_stmt_p (gimple *, gimple *);
extern bool nowrap_type_p (tree);
extern tree get_niter_type_bound (tree, tree, tree);
extern bool scev_probably_wraps_p (tree, tree, tree, gimple *,
                                   class loop *, bool, tree * = nullptr);
extern void free_numbers_of_iterations_estimates (class loop *);
extern void free_numbers_of_iterations_estimates (function *);
extern tree simplify_replace_tree (tree, tree,
                                   tree, tree (*)(tree, void *) = NULL,
                                   void * = NULL, bool do_fold = true);
extern void substitute_in_loop_info (class loop *, tree, tree);
 
#endif /* GCC_TREE_SSA_LOOP_NITER_H */