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5254eac4 | 1 | /* Communication between registering jump thread requests and |
2ed4d7ee | 2 | updating the SSA/CFG for jump threading. |
a5544970 | 3 | Copyright (C) 2013-2019 Free Software Foundation, Inc. |
5254eac4 JL |
4 | |
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GCC; see the file COPYING3. If not see | |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #ifndef _TREE_SSA_THREADUPDATE_H | |
22 | #define _TREE_SSA_THREADUPDATE_H 1 | |
23 | ||
24 | /* In tree-ssa-threadupdate.c. */ | |
25 | extern bool thread_through_all_blocks (bool); | |
26 | enum jump_thread_edge_type | |
27 | { | |
28 | EDGE_START_JUMP_THREAD, | |
50e9ff83 | 29 | EDGE_FSM_THREAD, |
5254eac4 JL |
30 | EDGE_COPY_SRC_BLOCK, |
31 | EDGE_COPY_SRC_JOINER_BLOCK, | |
32 | EDGE_NO_COPY_SRC_BLOCK | |
33 | }; | |
34 | ||
35 | class jump_thread_edge | |
36 | { | |
37 | public: | |
38 | jump_thread_edge (edge e, enum jump_thread_edge_type type) | |
39 | : e (e), type (type) {} | |
40 | ||
41 | edge e; | |
42 | enum jump_thread_edge_type type; | |
43 | }; | |
44 | ||
aee2d611 | 45 | extern void register_jump_thread (vec <class jump_thread_edge *> *); |
00852255 | 46 | extern void remove_jump_threads_including (edge); |
f0bc3cc0 | 47 | extern void delete_jump_thread_path (vec <class jump_thread_edge *> *); |
d64f8dd2 | 48 | extern void remove_ctrl_stmt_and_useless_edges (basic_block, basic_block); |
af121e82 | 49 | extern void free_dom_edge_info (edge); |
5806e062 | 50 | extern unsigned int estimate_threading_killed_stmts (basic_block); |
2c89b952 JL |
51 | |
52 | enum bb_dom_status | |
53 | { | |
54 | /* BB does not dominate latch of the LOOP. */ | |
55 | DOMST_NONDOMINATING, | |
56 | /* The LOOP is broken (there is no path from the header to its latch. */ | |
57 | DOMST_LOOP_BROKEN, | |
58 | /* BB dominates the latch of the LOOP. */ | |
59 | DOMST_DOMINATING | |
60 | }; | |
61 | ||
62 | enum bb_dom_status determine_bb_domination_status (struct loop *, basic_block); | |
63 | ||
5254eac4 | 64 | #endif |