1  /* Loop manipulation header.
       2     Copyright (C) 2014-2023 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_CFGLOOPMANIP_H
      21  #define GCC_CFGLOOPMANIP_H
      22  
      23  enum
      24  {
      25    CP_SIMPLE_PREHEADERS = 1,
      26    CP_FALLTHRU_PREHEADERS = 2
      27  };
      28  
      29  #define DLTHE_FLAG_UPDATE_FREQ	1	/* Update frequencies in
      30  					   duplicate_loop_to_header_edge.  */
      31  #define DLTHE_RECORD_COPY_NUMBER 2	/* Record copy number in the aux
      32  					   field of newly create BB.  */
      33  #define DLTHE_FLAG_COMPLETTE_PEEL 4	/* Update frequencies expecting
      34  					   a complete peeling.  */
      35  extern edge mfb_kj_edge;
      36  
      37  extern bool remove_path (edge, bool * = NULL, bitmap = NULL);
      38  extern void place_new_loop (struct function *, class loop *);
      39  extern void add_loop (class loop *, class loop *);
      40  extern void scale_loop_frequencies (class loop *, profile_probability);
      41  extern void scale_loop_profile (class loop *, profile_probability, gcov_type);
      42  extern edge create_empty_if_region_on_edge (edge, tree);
      43  extern class loop *create_empty_loop_on_edge (edge, tree, tree, tree, tree,
      44  					       tree *, tree *, class loop *);
      45  extern void unloop (class loop *, bool *, bitmap);
      46  extern void copy_loop_info (class loop *loop, class loop *target);
      47  extern class loop * duplicate_loop (class loop *, class loop *,
      48  				     class loop * = NULL);
      49  extern void duplicate_subloops (class loop *, class loop *);
      50  extern bool can_duplicate_loop_p (const class loop *loop);
      51  extern bool
      52  duplicate_loop_body_to_header_edge (class loop *, edge, unsigned, sbitmap, edge,
      53  				    vec<edge> *, int);
      54  extern bool mfb_keep_just (edge);
      55  basic_block create_preheader (class loop *, int);
      56  extern void create_preheaders (int);
      57  extern void force_single_succ_latches (void);
      58  class loop * loop_version (class loop *, void *,
      59  			    basic_block *,
      60  			    profile_probability, profile_probability,
      61  			    profile_probability, profile_probability, bool);
      62  
      63  #endif /* GCC_CFGLOOPMANIP_H */