1 /* Header file for High-level loop manipulation functions.
2    Copyright (C) 2013-2018 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_MANIP_H
21 #define GCC_TREE_SSA_LOOP_MANIP_H
22 
23 typedef void (*transform_callback)(struct loop *, void *);
24 
25 extern void create_iv (tree, tree, tree, struct loop *, gimple_stmt_iterator *,
26 		       bool, tree *, tree *);
27 extern void rewrite_into_loop_closed_ssa_1 (bitmap, unsigned, int,
28 					    struct loop *);
29 extern void rewrite_into_loop_closed_ssa (bitmap, unsigned);
30 extern void rewrite_virtuals_into_loop_closed_ssa (struct loop *);
31 extern void verify_loop_closed_ssa (bool, struct loop * = NULL);
32 
33 static inline void
34 checking_verify_loop_closed_ssa (bool verify_ssa_p, struct loop *loop = NULL)
35 {
36   if (flag_checking)
37     verify_loop_closed_ssa (verify_ssa_p, loop);
38 }
39 
40 extern basic_block split_loop_exit_edge (edge);
41 extern basic_block ip_end_pos (struct loop *);
42 extern basic_block ip_normal_pos (struct loop *);
43 extern void standard_iv_increment_position (struct loop *,
44 					    gimple_stmt_iterator *, bool *);
45 extern bool gimple_duplicate_loop_to_header_edge (struct loop *, edge,
46 						  unsigned int, sbitmap,
47 						  edge, vec<edge> *,
48 						  int);
49 extern bool can_unroll_loop_p (struct loop *loop, unsigned factor,
50 			       struct tree_niter_desc *niter);
51 extern gcov_type niter_for_unrolled_loop (struct loop *, unsigned);
52 extern void tree_transform_and_unroll_loop (struct loop *, unsigned,
53 					    edge, struct tree_niter_desc *,
54 					    transform_callback, void *);
55 extern void tree_unroll_loop (struct loop *, unsigned,
56 			      edge, struct tree_niter_desc *);
57 extern tree canonicalize_loop_ivs (struct loop *, tree *, bool);
58 
59 
60 
61 #endif /* GCC_TREE_SSA_LOOP_MANIP_H */
62