]>
Commit | Line | Data |
---|---|---|
f8bf9252 | 1 | /* Gimple Represented as Polyhedra. |
5624e564 | 2 | Copyright (C) 2006-2015 Free Software Foundation, Inc. |
f8bf9252 SP |
3 | Contributed by Sebastian Pop <sebastian.pop@inria.fr>. |
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 | /* This pass converts GIMPLE to GRAPHITE, performs some loop | |
22 | transformations and then converts the resulting representation back | |
204b560f | 23 | to GIMPLE. |
f8bf9252 SP |
24 | |
25 | An early description of this pass can be found in the GCC Summit'06 | |
26 | paper "GRAPHITE: Polyhedral Analyses and Optimizations for GCC". | |
27 | The wiki page http://gcc.gnu.org/wiki/Graphite contains pointers to | |
d6bb5ccf | 28 | the related work. */ |
f8bf9252 SP |
29 | |
30 | #include "config.h" | |
33ad93b9 | 31 | |
eae1a5d4 | 32 | #ifdef HAVE_isl |
4bc190dc JW |
33 | /* Workaround for GMP 5.1.3 bug, see PR56019. */ |
34 | #include <stddef.h> | |
35 | ||
32400032 | 36 | #include <isl/constraint.h> |
33ad93b9 RG |
37 | #include <isl/set.h> |
38 | #include <isl/map.h> | |
39 | #include <isl/options.h> | |
40 | #include <isl/union_map.h> | |
eae1a5d4 | 41 | #endif |
33ad93b9 | 42 | |
f8bf9252 SP |
43 | #include "system.h" |
44 | #include "coretypes.h" | |
c7131fb2 | 45 | #include "backend.h" |
9c358739 AM |
46 | #include "diagnostic-core.h" |
47 | #include "cfgloop.h" | |
48 | #include "tree-pass.h" | |
49b8fe6c | 49 | #include "params.h" |
9c358739 AM |
50 | |
51 | #ifdef HAVE_isl | |
9fdcd34e | 52 | #include "cfghooks.h" |
40e23961 | 53 | #include "tree.h" |
c7131fb2 | 54 | #include "gimple.h" |
c7131fb2 | 55 | #include "fold-const.h" |
5be5c238 | 56 | #include "gimple-iterator.h" |
442b4905 AM |
57 | #include "tree-cfg.h" |
58 | #include "tree-ssa-loop.h" | |
f8bf9252 SP |
59 | #include "tree-data-ref.h" |
60 | #include "tree-scalar-evolution.h" | |
9c358739 | 61 | #include "graphite-poly.h" |
6a7441f5 | 62 | #include "dbgcnt.h" |
c1bf2a39 | 63 | #include "tree-parloops.h" |
4484a35a | 64 | #include "tree-cfgcleanup.h" |
204b560f | 65 | #include "graphite-scop-detection.h" |
f6cc3103 | 66 | #include "graphite-isl-ast-to-gimple.h" |
204b560f | 67 | #include "graphite-sese-to-poly.h" |
57d598f7 | 68 | |
204b560f | 69 | /* Print global statistics to FILE. */ |
4d6c7237 SP |
70 | |
71 | static void | |
204b560f | 72 | print_global_statistics (FILE* file) |
4d6c7237 | 73 | { |
204b560f SP |
74 | long n_bbs = 0; |
75 | long n_loops = 0; | |
76 | long n_stmts = 0; | |
77 | long n_conditions = 0; | |
78 | long n_p_bbs = 0; | |
79 | long n_p_loops = 0; | |
80 | long n_p_stmts = 0; | |
81 | long n_p_conditions = 0; | |
4d6c7237 | 82 | |
204b560f | 83 | basic_block bb; |
4d6c7237 | 84 | |
04a90bec | 85 | FOR_ALL_BB_FN (bb, cfun) |
204b560f SP |
86 | { |
87 | gimple_stmt_iterator psi; | |
4d6c7237 | 88 | |
204b560f SP |
89 | n_bbs++; |
90 | n_p_bbs += bb->count; | |
4d6c7237 | 91 | |
204b560f SP |
92 | /* Ignore artificial surrounding loop. */ |
93 | if (bb == bb->loop_father->header | |
94 | && bb->index != 0) | |
4d6c7237 | 95 | { |
204b560f SP |
96 | n_loops++; |
97 | n_p_loops += bb->count; | |
4d6c7237 | 98 | } |
4d6c7237 | 99 | |
d630245f | 100 | if (EDGE_COUNT (bb->succs) > 1) |
204b560f SP |
101 | { |
102 | n_conditions++; | |
103 | n_p_conditions += bb->count; | |
104 | } | |
4d6c7237 | 105 | |
204b560f SP |
106 | for (psi = gsi_start_bb (bb); !gsi_end_p (psi); gsi_next (&psi)) |
107 | { | |
108 | n_stmts++; | |
109 | n_p_stmts += bb->count; | |
110 | } | |
4d6c7237 SP |
111 | } |
112 | ||
204b560f SP |
113 | fprintf (file, "\nGlobal statistics ("); |
114 | fprintf (file, "BBS:%ld, ", n_bbs); | |
115 | fprintf (file, "LOOPS:%ld, ", n_loops); | |
116 | fprintf (file, "CONDITIONS:%ld, ", n_conditions); | |
117 | fprintf (file, "STMTS:%ld)\n", n_stmts); | |
118 | fprintf (file, "\nGlobal profiling statistics ("); | |
119 | fprintf (file, "BBS:%ld, ", n_p_bbs); | |
120 | fprintf (file, "LOOPS:%ld, ", n_p_loops); | |
121 | fprintf (file, "CONDITIONS:%ld, ", n_p_conditions); | |
122 | fprintf (file, "STMTS:%ld)\n", n_p_stmts); | |
f8bf9252 SP |
123 | } |
124 | ||
204b560f | 125 | /* Print statistics for SCOP to FILE. */ |
f8bf9252 SP |
126 | |
127 | static void | |
204b560f | 128 | print_graphite_scop_statistics (FILE* file, scop_p scop) |
f8bf9252 | 129 | { |
204b560f SP |
130 | long n_bbs = 0; |
131 | long n_loops = 0; | |
132 | long n_stmts = 0; | |
133 | long n_conditions = 0; | |
134 | long n_p_bbs = 0; | |
135 | long n_p_loops = 0; | |
136 | long n_p_stmts = 0; | |
137 | long n_p_conditions = 0; | |
f8bf9252 | 138 | |
204b560f | 139 | basic_block bb; |
f8bf9252 | 140 | |
04a90bec | 141 | FOR_ALL_BB_FN (bb, cfun) |
f8bf9252 | 142 | { |
204b560f SP |
143 | gimple_stmt_iterator psi; |
144 | loop_p loop = bb->loop_father; | |
f8bf9252 | 145 | |
204b560f SP |
146 | if (!bb_in_sese_p (bb, SCOP_REGION (scop))) |
147 | continue; | |
f8bf9252 | 148 | |
204b560f SP |
149 | n_bbs++; |
150 | n_p_bbs += bb->count; | |
f8bf9252 | 151 | |
d630245f | 152 | if (EDGE_COUNT (bb->succs) > 1) |
f8bf9252 | 153 | { |
204b560f SP |
154 | n_conditions++; |
155 | n_p_conditions += bb->count; | |
f8bf9252 | 156 | } |
f8bf9252 | 157 | |
204b560f | 158 | for (psi = gsi_start_bb (bb); !gsi_end_p (psi); gsi_next (&psi)) |
f8bf9252 | 159 | { |
204b560f SP |
160 | n_stmts++; |
161 | n_p_stmts += bb->count; | |
f8bf9252 | 162 | } |
f8bf9252 | 163 | |
204b560f SP |
164 | if (loop->header == bb && loop_in_sese_p (loop, SCOP_REGION (scop))) |
165 | { | |
166 | n_loops++; | |
167 | n_p_loops += bb->count; | |
168 | } | |
169 | } | |
6a114766 | 170 | |
204b560f SP |
171 | fprintf (file, "\nSCoP statistics ("); |
172 | fprintf (file, "BBS:%ld, ", n_bbs); | |
173 | fprintf (file, "LOOPS:%ld, ", n_loops); | |
174 | fprintf (file, "CONDITIONS:%ld, ", n_conditions); | |
175 | fprintf (file, "STMTS:%ld)\n", n_stmts); | |
176 | fprintf (file, "\nSCoP profiling statistics ("); | |
177 | fprintf (file, "BBS:%ld, ", n_p_bbs); | |
178 | fprintf (file, "LOOPS:%ld, ", n_p_loops); | |
179 | fprintf (file, "CONDITIONS:%ld, ", n_p_conditions); | |
180 | fprintf (file, "STMTS:%ld)\n", n_p_stmts); | |
f8bf9252 SP |
181 | } |
182 | ||
204b560f | 183 | /* Print statistics for SCOPS to FILE. */ |
f8bf9252 | 184 | |
204b560f | 185 | static void |
9771b263 | 186 | print_graphite_statistics (FILE* file, vec<scop_p> scops) |
f8bf9252 | 187 | { |
f8bf9252 | 188 | int i; |
f8bf9252 | 189 | |
204b560f | 190 | scop_p scop; |
f8bf9252 | 191 | |
9771b263 | 192 | FOR_EACH_VEC_ELT (scops, i, scop) |
204b560f | 193 | print_graphite_scop_statistics (file, scop); |
f8bf9252 SP |
194 | } |
195 | ||
204b560f | 196 | /* Initialize graphite: when there are no loops returns false. */ |
f8bf9252 SP |
197 | |
198 | static bool | |
33ad93b9 | 199 | graphite_initialize (isl_ctx *ctx) |
f8bf9252 | 200 | { |
0fc822d0 | 201 | if (number_of_loops (cfun) <= 1 |
9bf13085 SP |
202 | /* FIXME: This limit on the number of basic blocks of a function |
203 | should be removed when the SCOP detection is faster. */ | |
0cae8d31 DM |
204 | || (n_basic_blocks_for_fn (cfun) > |
205 | PARAM_VALUE (PARAM_GRAPHITE_MAX_BBS_PER_FUNCTION))) | |
f8bf9252 | 206 | { |
204b560f SP |
207 | if (dump_file && (dump_flags & TDF_DETAILS)) |
208 | print_global_statistics (dump_file); | |
f8bf9252 | 209 | |
33ad93b9 | 210 | isl_ctx_free (ctx); |
204b560f | 211 | return false; |
f8bf9252 SP |
212 | } |
213 | ||
cdb9802c | 214 | scev_reset (); |
204b560f SP |
215 | recompute_all_dominators (); |
216 | initialize_original_copy_tables (); | |
85437633 | 217 | |
204b560f SP |
218 | if (dump_file && dump_flags) |
219 | dump_function_to_file (current_function_decl, dump_file, dump_flags); | |
f8bf9252 | 220 | |
204b560f | 221 | return true; |
f8bf9252 SP |
222 | } |
223 | ||
204b560f SP |
224 | /* Finalize graphite: perform CFG cleanup when NEED_CFG_CLEANUP_P is |
225 | true. */ | |
f8bf9252 SP |
226 | |
227 | static void | |
204b560f | 228 | graphite_finalize (bool need_cfg_cleanup_p) |
f8bf9252 | 229 | { |
204b560f | 230 | if (need_cfg_cleanup_p) |
8e88f9fd | 231 | { |
fd4a56ff | 232 | scev_reset (); |
8e88f9fd | 233 | cleanup_tree_cfg (); |
0a6a6ac9 | 234 | profile_status_for_fn (cfun) = PROFILE_ABSENT; |
8e88f9fd SP |
235 | release_recorded_exits (); |
236 | tree_estimate_probability (); | |
237 | } | |
f8bf9252 | 238 | |
204b560f | 239 | free_original_copy_tables (); |
a61e3d2a | 240 | |
204b560f SP |
241 | if (dump_file && dump_flags) |
242 | print_loops (dump_file, 3); | |
f8bf9252 SP |
243 | } |
244 | ||
33ad93b9 RG |
245 | isl_ctx *the_isl_ctx; |
246 | ||
f8bf9252 SP |
247 | /* Perform a set of linear transforms on the loops of the current |
248 | function. */ | |
249 | ||
250 | void | |
251 | graphite_transform_loops (void) | |
252 | { | |
253 | int i; | |
254 | scop_p scop; | |
204b560f | 255 | bool need_cfg_cleanup_p = false; |
6e1aa848 | 256 | vec<scop_p> scops = vNULL; |
33ad93b9 | 257 | isl_ctx *ctx; |
f8bf9252 | 258 | |
62e0a1ed RG |
259 | /* If a function is parallel it was most probably already run through graphite |
260 | once. No need to run again. */ | |
261 | if (parallelized_function_p (cfun->decl)) | |
262 | return; | |
263 | ||
33ad93b9 | 264 | ctx = isl_ctx_alloc (); |
c3284718 | 265 | isl_options_set_on_error (ctx, ISL_ON_ERROR_ABORT); |
33ad93b9 | 266 | if (!graphite_initialize (ctx)) |
f8bf9252 SP |
267 | return; |
268 | ||
33ad93b9 | 269 | the_isl_ctx = ctx; |
204b560f | 270 | build_scops (&scops); |
f8bf9252 SP |
271 | |
272 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
f8bf9252 | 273 | { |
204b560f SP |
274 | print_graphite_statistics (dump_file, scops); |
275 | print_global_statistics (dump_file); | |
276 | } | |
0b040072 | 277 | |
9771b263 | 278 | FOR_EACH_VEC_ELT (scops, i, scop) |
6a7441f5 SP |
279 | if (dbg_cnt (graphite_scop)) |
280 | { | |
33ad93b9 | 281 | scop->ctx = ctx; |
efa21390 | 282 | build_poly_scop (scop); |
f8bf9252 | 283 | |
d6bb5ccf SP |
284 | if (dump_file && dump_flags) |
285 | print_scop (dump_file, scop, 3); | |
286 | ||
eae1a5d4 RG |
287 | if (POLY_SCOP_P (scop) |
288 | && apply_poly_transforms (scop) | |
289 | && graphite_regenerate_ast_isl (scop)) | |
290 | need_cfg_cleanup_p = true; | |
eae1a5d4 | 291 | |
efa21390 | 292 | } |
f8bf9252 | 293 | |
204b560f SP |
294 | free_scops (scops); |
295 | graphite_finalize (need_cfg_cleanup_p); | |
33ad93b9 RG |
296 | the_isl_ctx = NULL; |
297 | isl_ctx_free (ctx); | |
f8bf9252 SP |
298 | } |
299 | ||
eae1a5d4 | 300 | #else /* If ISL is not available: #ifndef HAVE_isl. */ |
f8bf9252 | 301 | |
c1bf2a39 | 302 | static void |
f8bf9252 SP |
303 | graphite_transform_loops (void) |
304 | { | |
eae1a5d4 | 305 | sorry ("Graphite loop optimizations cannot be used (ISL is not available)."); |
f8bf9252 SP |
306 | } |
307 | ||
308 | #endif | |
c1bf2a39 AM |
309 | |
310 | ||
311 | static unsigned int | |
726338f4 | 312 | graphite_transforms (struct function *fun) |
c1bf2a39 | 313 | { |
726338f4 | 314 | if (number_of_loops (fun) <= 1) |
c1bf2a39 AM |
315 | return 0; |
316 | ||
317 | graphite_transform_loops (); | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static bool | |
323 | gate_graphite_transforms (void) | |
324 | { | |
325 | /* Enable -fgraphite pass if any one of the graphite optimization flags | |
326 | is turned on. */ | |
d6bb5ccf | 327 | if (flag_graphite_identity |
c1bf2a39 | 328 | || flag_loop_parallelize_all |
a5e5ea0c | 329 | || flag_loop_optimize_isl) |
c1bf2a39 AM |
330 | flag_graphite = 1; |
331 | ||
332 | return flag_graphite != 0; | |
333 | } | |
334 | ||
17795822 TS |
335 | namespace { |
336 | ||
337 | const pass_data pass_data_graphite = | |
c1bf2a39 AM |
338 | { |
339 | GIMPLE_PASS, /* type */ | |
340 | "graphite0", /* name */ | |
341 | OPTGROUP_LOOP, /* optinfo_flags */ | |
c1bf2a39 AM |
342 | TV_GRAPHITE, /* tv_id */ |
343 | ( PROP_cfg | PROP_ssa ), /* properties_required */ | |
344 | 0, /* properties_provided */ | |
345 | 0, /* properties_destroyed */ | |
346 | 0, /* todo_flags_start */ | |
347 | 0, /* todo_flags_finish */ | |
348 | }; | |
349 | ||
17795822 | 350 | class pass_graphite : public gimple_opt_pass |
c1bf2a39 AM |
351 | { |
352 | public: | |
353 | pass_graphite (gcc::context *ctxt) | |
354 | : gimple_opt_pass (pass_data_graphite, ctxt) | |
355 | {} | |
356 | ||
357 | /* opt_pass methods: */ | |
1a3d085c | 358 | virtual bool gate (function *) { return gate_graphite_transforms (); } |
c1bf2a39 AM |
359 | |
360 | }; // class pass_graphite | |
361 | ||
17795822 TS |
362 | } // anon namespace |
363 | ||
c1bf2a39 AM |
364 | gimple_opt_pass * |
365 | make_pass_graphite (gcc::context *ctxt) | |
366 | { | |
367 | return new pass_graphite (ctxt); | |
368 | } | |
369 | ||
17795822 TS |
370 | namespace { |
371 | ||
372 | const pass_data pass_data_graphite_transforms = | |
c1bf2a39 AM |
373 | { |
374 | GIMPLE_PASS, /* type */ | |
375 | "graphite", /* name */ | |
376 | OPTGROUP_LOOP, /* optinfo_flags */ | |
c1bf2a39 AM |
377 | TV_GRAPHITE_TRANSFORMS, /* tv_id */ |
378 | ( PROP_cfg | PROP_ssa ), /* properties_required */ | |
379 | 0, /* properties_provided */ | |
380 | 0, /* properties_destroyed */ | |
381 | 0, /* todo_flags_start */ | |
382 | 0, /* todo_flags_finish */ | |
383 | }; | |
384 | ||
17795822 | 385 | class pass_graphite_transforms : public gimple_opt_pass |
c1bf2a39 AM |
386 | { |
387 | public: | |
388 | pass_graphite_transforms (gcc::context *ctxt) | |
389 | : gimple_opt_pass (pass_data_graphite_transforms, ctxt) | |
390 | {} | |
391 | ||
392 | /* opt_pass methods: */ | |
1a3d085c | 393 | virtual bool gate (function *) { return gate_graphite_transforms (); } |
726338f4 | 394 | virtual unsigned int execute (function *fun) { return graphite_transforms (fun); } |
c1bf2a39 AM |
395 | |
396 | }; // class pass_graphite_transforms | |
397 | ||
17795822 TS |
398 | } // anon namespace |
399 | ||
c1bf2a39 AM |
400 | gimple_opt_pass * |
401 | make_pass_graphite_transforms (gcc::context *ctxt) | |
402 | { | |
403 | return new pass_graphite_transforms (ctxt); | |
404 | } | |
405 | ||
406 |