1 | /* Code for GIMPLE range related routines. |
2 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
3 | Contributed by Andrew MacLeod <amacleod@redhat.com> |
4 | and Aldy Hernandez <aldyh@redhat.com>. |
5 | |
6 | This file is part of GCC. |
7 | |
8 | GCC is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by |
10 | the Free Software Foundation; either version 3, or (at your option) |
11 | any later version. |
12 | |
13 | GCC is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | GNU General Public License for more details. |
17 | |
18 | You should have received a copy of the GNU General Public License |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ |
21 | |
22 | #include "config.h" |
23 | #include "system.h" |
24 | #include "coretypes.h" |
25 | #include "backend.h" |
26 | #include "tree.h" |
27 | #include "gimple.h" |
28 | #include "ssa.h" |
29 | #include "gimple-pretty-print.h" |
30 | #include "gimple-iterator.h" |
31 | #include "tree-cfg.h" |
32 | #include "fold-const.h" |
33 | #include "tree-cfg.h" |
34 | #include "cfgloop.h" |
35 | #include "tree-scalar-evolution.h" |
36 | #include "gimple-range.h" |
37 | #include "gimple-fold.h" |
38 | #include "gimple-walk.h" |
39 | |
40 | gimple_ranger::gimple_ranger (bool use_imm_uses) : |
41 | non_executable_edge_flag (cfun), |
42 | m_cache (non_executable_edge_flag, use_imm_uses), |
43 | tracer ("" ), |
44 | current_bb (NULL) |
45 | { |
46 | // If the cache has a relation oracle, use it. |
47 | m_oracle = m_cache.oracle (); |
48 | if (dump_file && (param_ranger_debug & RANGER_DEBUG_TRACE)) |
49 | tracer.enable_trace (); |
50 | m_stmt_list.create (nelems: 0); |
51 | m_stmt_list.safe_grow (num_ssa_names); |
52 | m_stmt_list.truncate (size: 0); |
53 | |
54 | // Ensure the not_executable flag is clear everywhere. |
55 | if (flag_checking) |
56 | { |
57 | basic_block bb; |
58 | FOR_ALL_BB_FN (bb, cfun) |
59 | { |
60 | edge_iterator ei; |
61 | edge e; |
62 | FOR_EACH_EDGE (e, ei, bb->succs) |
63 | gcc_checking_assert ((e->flags & non_executable_edge_flag) == 0); |
64 | } |
65 | } |
66 | } |
67 | |
68 | gimple_ranger::~gimple_ranger () |
69 | { |
70 | m_stmt_list.release (); |
71 | } |
72 | |
73 | // Return a range_query which accesses just the known global values. |
74 | |
75 | range_query & |
76 | gimple_ranger::const_query () |
77 | { |
78 | return m_cache.const_query (); |
79 | } |
80 | |
81 | bool |
82 | gimple_ranger::range_of_expr (vrange &r, tree expr, gimple *stmt) |
83 | { |
84 | unsigned idx; |
85 | if (!gimple_range_ssa_p (exp: expr)) |
86 | return get_tree_range (v&: r, expr, stmt); |
87 | |
88 | if ((idx = tracer.header (str: "range_of_expr(" ))) |
89 | { |
90 | print_generic_expr (dump_file, expr, TDF_SLIM); |
91 | fputs (s: ")" , stream: dump_file); |
92 | if (stmt) |
93 | { |
94 | fputs (s: " at stmt " , stream: dump_file); |
95 | print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM); |
96 | } |
97 | else |
98 | fputs (s: "\n" , stream: dump_file); |
99 | } |
100 | |
101 | // If there is no statement, just get the global value. |
102 | if (!stmt) |
103 | { |
104 | Value_Range tmp (TREE_TYPE (expr)); |
105 | m_cache.get_global_range (r, name: expr); |
106 | // Pick up implied context information from the on-entry cache |
107 | // if current_bb is set. Do not attempt any new calculations. |
108 | if (current_bb && m_cache.block_range (r&: tmp, bb: current_bb, name: expr, calc: false)) |
109 | { |
110 | r.intersect (tmp); |
111 | char str[80]; |
112 | sprintf (s: str, format: "picked up range from bb %d\n" ,current_bb->index); |
113 | if (idx) |
114 | tracer.print (counter: idx, str); |
115 | } |
116 | } |
117 | // For a debug stmt, pick the best value currently available, do not |
118 | // trigger new value calculations. PR 100781. |
119 | else if (is_gimple_debug (gs: stmt)) |
120 | m_cache.range_of_expr (r, name: expr, stmt); |
121 | else |
122 | { |
123 | basic_block bb = gimple_bb (g: stmt); |
124 | gimple *def_stmt = SSA_NAME_DEF_STMT (expr); |
125 | |
126 | // If name is defined in this block, try to get an range from S. |
127 | if (def_stmt && gimple_bb (g: def_stmt) == bb) |
128 | { |
129 | // Declared in this block, if it has a global set, check for an |
130 | // override from a block walk, otherwise calculate it. |
131 | if (m_cache.get_global_range (r, name: expr)) |
132 | m_cache.block_range (r, bb, name: expr, calc: false); |
133 | else |
134 | range_of_stmt (r, def_stmt, name: expr); |
135 | } |
136 | // Otherwise OP comes from outside this block, use range on entry. |
137 | else |
138 | range_on_entry (r, bb, name: expr); |
139 | } |
140 | if (idx) |
141 | tracer.trailer (counter: idx, caller: "range_of_expr" , result: true, name: expr, r); |
142 | return true; |
143 | } |
144 | |
145 | // Return the range of NAME on entry to block BB in R. |
146 | |
147 | void |
148 | gimple_ranger::range_on_entry (vrange &r, basic_block bb, tree name) |
149 | { |
150 | Value_Range entry_range (TREE_TYPE (name)); |
151 | gcc_checking_assert (gimple_range_ssa_p (name)); |
152 | |
153 | unsigned idx; |
154 | if ((idx = tracer.header (str: "range_on_entry (" ))) |
155 | { |
156 | print_generic_expr (dump_file, name, TDF_SLIM); |
157 | fprintf (stream: dump_file, format: ") to BB %d\n" , bb->index); |
158 | } |
159 | |
160 | // Start with any known range |
161 | range_of_stmt (r, SSA_NAME_DEF_STMT (name), name); |
162 | |
163 | // Now see if there is any on_entry value which may refine it. |
164 | if (m_cache.block_range (r&: entry_range, bb, name)) |
165 | r.intersect (entry_range); |
166 | |
167 | if (idx) |
168 | tracer.trailer (counter: idx, caller: "range_on_entry" , result: true, name, r); |
169 | } |
170 | |
171 | // Calculate the range for NAME at the end of block BB and return it in R. |
172 | // Return false if no range can be calculated. |
173 | |
174 | void |
175 | gimple_ranger::range_on_exit (vrange &r, basic_block bb, tree name) |
176 | { |
177 | // on-exit from the exit block? |
178 | gcc_checking_assert (gimple_range_ssa_p (name)); |
179 | |
180 | unsigned idx; |
181 | if ((idx = tracer.header (str: "range_on_exit (" ))) |
182 | { |
183 | print_generic_expr (dump_file, name, TDF_SLIM); |
184 | fprintf (stream: dump_file, format: ") from BB %d\n" , bb->index); |
185 | } |
186 | |
187 | gimple *s = SSA_NAME_DEF_STMT (name); |
188 | basic_block def_bb = gimple_bb (g: s); |
189 | // If this is not the definition block, get the range on the last stmt in |
190 | // the block... if there is one. |
191 | if (def_bb != bb) |
192 | s = last_nondebug_stmt (bb); |
193 | // If there is no statement provided, get the range_on_entry for this block. |
194 | if (s) |
195 | range_of_expr (r, expr: name, stmt: s); |
196 | else |
197 | range_on_entry (r, bb, name); |
198 | gcc_checking_assert (r.undefined_p () |
199 | || range_compatible_p (r.type (), TREE_TYPE (name))); |
200 | |
201 | if (idx) |
202 | tracer.trailer (counter: idx, caller: "range_on_exit" , result: true, name, r); |
203 | } |
204 | |
205 | // Calculate a range for NAME on edge E and return it in R. |
206 | |
207 | bool |
208 | gimple_ranger::range_on_edge (vrange &r, edge e, tree name) |
209 | { |
210 | Value_Range edge_range (TREE_TYPE (name)); |
211 | |
212 | if (!r.supports_type_p (TREE_TYPE (name))) |
213 | return false; |
214 | |
215 | // Do not process values along abnormal edges. |
216 | if (e->flags & EDGE_ABNORMAL) |
217 | return get_tree_range (v&: r, expr: name, NULL); |
218 | |
219 | unsigned idx; |
220 | if ((idx = tracer.header (str: "range_on_edge (" ))) |
221 | { |
222 | print_generic_expr (dump_file, name, TDF_SLIM); |
223 | fprintf (stream: dump_file, format: ") on edge %d->%d\n" , e->src->index, e->dest->index); |
224 | } |
225 | |
226 | // Check to see if the edge is executable. |
227 | if ((e->flags & non_executable_edge_flag)) |
228 | { |
229 | r.set_undefined (); |
230 | if (idx) |
231 | tracer.trailer (counter: idx, caller: "range_on_edge [Unexecutable] " , result: true, |
232 | name, r); |
233 | return true; |
234 | } |
235 | |
236 | bool res = true; |
237 | if (!gimple_range_ssa_p (exp: name)) |
238 | res = get_tree_range (v&: r, expr: name, NULL); |
239 | else |
240 | { |
241 | range_on_exit (r, bb: e->src, name); |
242 | // If this is not an abnormal edge, check for a non-null exit . |
243 | if ((e->flags & (EDGE_EH | EDGE_ABNORMAL)) == 0) |
244 | m_cache.m_exit.maybe_adjust_range (r, name, bb: e->src); |
245 | gcc_checking_assert (r.undefined_p () |
246 | || range_compatible_p (r.type(), TREE_TYPE (name))); |
247 | |
248 | // Check to see if NAME is defined on edge e. |
249 | if (m_cache.range_on_edge (r&: edge_range, e, expr: name)) |
250 | r.intersect (edge_range); |
251 | } |
252 | |
253 | if (idx) |
254 | tracer.trailer (counter: idx, caller: "range_on_edge" , result: res, name, r); |
255 | return res; |
256 | } |
257 | |
258 | // fold_range wrapper for range_of_stmt to use as an internal client. |
259 | |
260 | bool |
261 | gimple_ranger::fold_range_internal (vrange &r, gimple *s, tree name) |
262 | { |
263 | fold_using_range f; |
264 | fur_depend src (s, &(gori ()), this); |
265 | return f.fold_stmt (r, s, src, name); |
266 | } |
267 | |
268 | // Calculate a range for statement S and return it in R. If NAME is |
269 | // provided it represents the SSA_NAME on the LHS of the statement. |
270 | // It is only required if there is more than one lhs/output. Check |
271 | // the global cache for NAME first to see if the evaluation can be |
272 | // avoided. If a range cannot be calculated, return false and UNDEFINED. |
273 | |
274 | bool |
275 | gimple_ranger::range_of_stmt (vrange &r, gimple *s, tree name) |
276 | { |
277 | bool res; |
278 | r.set_undefined (); |
279 | |
280 | unsigned idx; |
281 | if ((idx = tracer.header (str: "range_of_stmt (" ))) |
282 | { |
283 | if (name) |
284 | print_generic_expr (dump_file, name, TDF_SLIM); |
285 | fputs (s: ") at stmt " , stream: dump_file); |
286 | print_gimple_stmt (dump_file, s, 0, TDF_SLIM); |
287 | } |
288 | |
289 | if (!name) |
290 | name = gimple_get_lhs (s); |
291 | |
292 | // If no name, simply call the base routine. |
293 | if (!name) |
294 | { |
295 | res = fold_range_internal (r, s, NULL_TREE); |
296 | if (res && is_a <gcond *> (p: s)) |
297 | { |
298 | // Update any exports in the cache if this is a gimple cond statement. |
299 | tree exp; |
300 | basic_block bb = gimple_bb (g: s); |
301 | FOR_EACH_GORI_EXPORT_NAME (m_cache.m_gori, bb, exp) |
302 | m_cache.propagate_updated_value (name: exp, bb); |
303 | } |
304 | } |
305 | else if (!gimple_range_ssa_p (exp: name)) |
306 | res = get_tree_range (v&: r, expr: name, NULL); |
307 | else |
308 | { |
309 | bool current; |
310 | // Check if the stmt has already been processed. |
311 | if (m_cache.get_global_range (r, name, current_p&: current)) |
312 | { |
313 | // If it isn't stale, use this cached value. |
314 | if (current) |
315 | { |
316 | if (idx) |
317 | tracer.trailer (counter: idx, caller: " cached" , result: true, name, r); |
318 | return true; |
319 | } |
320 | } |
321 | else |
322 | prefill_stmt_dependencies (ssa: name); |
323 | |
324 | // Calculate a new value. |
325 | Value_Range tmp (TREE_TYPE (name)); |
326 | fold_range_internal (r&: tmp, s, name); |
327 | |
328 | // Combine the new value with the old value. This is required because |
329 | // the way value propagation works, when the IL changes on the fly we |
330 | // can sometimes get different results. See PR 97741. |
331 | bool changed = r.intersect (tmp); |
332 | m_cache.set_global_range (name, r, changed); |
333 | res = true; |
334 | } |
335 | |
336 | if (idx) |
337 | tracer.trailer (counter: idx, caller: "range_of_stmt" , result: res, name, r); |
338 | return res; |
339 | } |
340 | |
341 | |
342 | // Check if NAME is a dependency that needs resolving, and push it on the |
343 | // stack if so. R is a scratch range. |
344 | |
345 | inline void |
346 | gimple_ranger::prefill_name (vrange &r, tree name) |
347 | { |
348 | if (!gimple_range_ssa_p (exp: name)) |
349 | return; |
350 | gimple *stmt = SSA_NAME_DEF_STMT (name); |
351 | if (!gimple_range_op_handler::supported_p (s: stmt) && !is_a<gphi *> (p: stmt)) |
352 | return; |
353 | |
354 | // If this op has not been processed yet, then push it on the stack |
355 | if (!m_cache.get_global_range (r, name)) |
356 | { |
357 | bool current; |
358 | // Set the global cache value and mark as alway_current. |
359 | m_cache.get_global_range (r, name, current_p&: current); |
360 | m_stmt_list.safe_push (obj: name); |
361 | } |
362 | } |
363 | |
364 | // This routine will seed the global cache with most of the dependencies of |
365 | // NAME. This prevents excessive call depth through the normal API. |
366 | |
367 | void |
368 | gimple_ranger::prefill_stmt_dependencies (tree ssa) |
369 | { |
370 | if (SSA_NAME_IS_DEFAULT_DEF (ssa)) |
371 | return; |
372 | |
373 | unsigned idx; |
374 | gimple *stmt = SSA_NAME_DEF_STMT (ssa); |
375 | gcc_checking_assert (stmt && gimple_bb (stmt)); |
376 | |
377 | // Only pre-process range-ops and phis. |
378 | if (!gimple_range_op_handler::supported_p (s: stmt) && !is_a<gphi *> (p: stmt)) |
379 | return; |
380 | |
381 | // Mark where on the stack we are starting. |
382 | unsigned start = m_stmt_list.length (); |
383 | m_stmt_list.safe_push (obj: ssa); |
384 | |
385 | idx = tracer.header (str: "ROS dependence fill\n" ); |
386 | |
387 | // Loop until back at the start point. |
388 | while (m_stmt_list.length () > start) |
389 | { |
390 | tree name = m_stmt_list.last (); |
391 | // NULL is a marker which indicates the next name in the stack has now |
392 | // been fully resolved, so we can fold it. |
393 | if (!name) |
394 | { |
395 | // Pop the NULL, then pop the name. |
396 | m_stmt_list.pop (); |
397 | name = m_stmt_list.pop (); |
398 | // Don't fold initial request, it will be calculated upon return. |
399 | if (m_stmt_list.length () > start) |
400 | { |
401 | // Fold and save the value for NAME. |
402 | stmt = SSA_NAME_DEF_STMT (name); |
403 | Value_Range r (TREE_TYPE (name)); |
404 | fold_range_internal (r, s: stmt, name); |
405 | // Make sure we don't lose any current global info. |
406 | Value_Range tmp (TREE_TYPE (name)); |
407 | m_cache.get_global_range (r&: tmp, name); |
408 | bool changed = tmp.intersect (r); |
409 | m_cache.set_global_range (name, r: tmp, changed); |
410 | } |
411 | continue; |
412 | } |
413 | |
414 | // Add marker indicating previous NAME in list should be folded |
415 | // when we get to this NULL. |
416 | m_stmt_list.safe_push (NULL_TREE); |
417 | stmt = SSA_NAME_DEF_STMT (name); |
418 | |
419 | if (idx) |
420 | { |
421 | tracer.print (counter: idx, str: "ROS dep fill (" ); |
422 | print_generic_expr (dump_file, name, TDF_SLIM); |
423 | fputs (s: ") at stmt " , stream: dump_file); |
424 | print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM); |
425 | } |
426 | |
427 | gphi *phi = dyn_cast <gphi *> (p: stmt); |
428 | if (phi) |
429 | { |
430 | Value_Range r (TREE_TYPE (gimple_phi_result (phi))); |
431 | for (unsigned x = 0; x < gimple_phi_num_args (gs: phi); x++) |
432 | prefill_name (r, name: gimple_phi_arg_def (gs: phi, index: x)); |
433 | } |
434 | else |
435 | { |
436 | gimple_range_op_handler handler (stmt); |
437 | if (handler) |
438 | { |
439 | tree op = handler.operand2 (); |
440 | if (op) |
441 | { |
442 | Value_Range r (TREE_TYPE (op)); |
443 | prefill_name (r, name: op); |
444 | } |
445 | op = handler.operand1 (); |
446 | if (op) |
447 | { |
448 | Value_Range r (TREE_TYPE (op)); |
449 | prefill_name (r, name: op); |
450 | } |
451 | } |
452 | } |
453 | } |
454 | if (idx) |
455 | { |
456 | unsupported_range r; |
457 | tracer.trailer (counter: idx, caller: "ROS " , result: false, name: ssa, r); |
458 | } |
459 | } |
460 | |
461 | |
462 | // This routine will invoke the gimple fold_stmt routine, providing context to |
463 | // range_of_expr calls via an private internal API. |
464 | |
465 | bool |
466 | gimple_ranger::fold_stmt (gimple_stmt_iterator *gsi, tree (*valueize) (tree)) |
467 | { |
468 | gimple *stmt = gsi_stmt (i: *gsi); |
469 | current_bb = gimple_bb (g: stmt); |
470 | bool ret = ::fold_stmt (gsi, valueize); |
471 | current_bb = NULL; |
472 | return ret; |
473 | } |
474 | |
475 | // Called during dominator walks to register any inferred ranges that take |
476 | // effect from this point forward. |
477 | |
478 | void |
479 | gimple_ranger::register_inferred_ranges (gimple *s) |
480 | { |
481 | // First, export the LHS if it is a new global range. |
482 | tree lhs = gimple_get_lhs (s); |
483 | if (lhs) |
484 | { |
485 | Value_Range tmp (TREE_TYPE (lhs)); |
486 | if (range_of_stmt (r&: tmp, s, name: lhs) && !tmp.varying_p () |
487 | && set_range_info (lhs, tmp) && dump_file) |
488 | { |
489 | fprintf (stream: dump_file, format: "Global Exported: " ); |
490 | print_generic_expr (dump_file, lhs, TDF_SLIM); |
491 | fprintf (stream: dump_file, format: " = " ); |
492 | tmp.dump (dump_file); |
493 | fputc (c: '\n', stream: dump_file); |
494 | } |
495 | } |
496 | m_cache.apply_inferred_ranges (s); |
497 | } |
498 | |
499 | // This function will walk the statements in BB to determine if any |
500 | // discovered inferred ranges in the block have any transitive effects, |
501 | // and if so, register those effects in BB. |
502 | |
503 | void |
504 | gimple_ranger::register_transitive_inferred_ranges (basic_block bb) |
505 | { |
506 | // Return if there are no inferred ranges in BB. |
507 | infer_range_manager &infer = m_cache.m_exit; |
508 | if (!infer.has_range_p (bb)) |
509 | return; |
510 | |
511 | if (dump_file && (dump_flags & TDF_DETAILS)) |
512 | fprintf (stream: dump_file, format: "Checking for transitive inferred ranges in BB %d\n" , |
513 | bb->index); |
514 | |
515 | for (gimple_stmt_iterator si = gsi_start_bb (bb); !gsi_end_p (i: si); |
516 | gsi_next (i: &si)) |
517 | { |
518 | gimple *s = gsi_stmt (i: si); |
519 | tree lhs = gimple_get_lhs (s); |
520 | // If the LHS already has an inferred effect, leave it be. |
521 | if (!gimple_range_ssa_p (exp: lhs) || infer.has_range_p (name: lhs, bb)) |
522 | continue; |
523 | // Pick up global value. |
524 | Value_Range g (TREE_TYPE (lhs)); |
525 | range_of_expr (r&: g, expr: lhs); |
526 | |
527 | // If either dependency has an inferred range, check if recalculating |
528 | // the LHS is different than the global value. If so, register it as |
529 | // an inferred range as well. |
530 | Value_Range r (TREE_TYPE (lhs)); |
531 | r.set_undefined (); |
532 | tree name1 = gori ().depend1 (name: lhs); |
533 | tree name2 = gori ().depend2 (name: lhs); |
534 | if ((name1 && infer.has_range_p (name: name1, bb)) |
535 | || (name2 && infer.has_range_p (name: name2, bb))) |
536 | { |
537 | // Check if folding S produces a different result. |
538 | if (fold_range (r, s, q: this) && g != r) |
539 | { |
540 | infer.add_range (name: lhs, bb, r); |
541 | m_cache.register_inferred_value (r, name: lhs, bb); |
542 | } |
543 | } |
544 | } |
545 | } |
546 | |
547 | // This routine will export whatever global ranges are known to GCC |
548 | // SSA_RANGE_NAME_INFO and SSA_NAME_PTR_INFO fields. |
549 | |
550 | void |
551 | gimple_ranger::export_global_ranges () |
552 | { |
553 | /* Cleared after the table header has been printed. */ |
554 | bool = true; |
555 | for (unsigned x = 1; x < num_ssa_names; x++) |
556 | { |
557 | tree name = ssa_name (x); |
558 | if (!name) |
559 | continue; |
560 | Value_Range r (TREE_TYPE (name)); |
561 | if (name && !SSA_NAME_IN_FREE_LIST (name) |
562 | && gimple_range_ssa_p (exp: name) |
563 | && m_cache.get_global_range (r, name) |
564 | && !r.varying_p()) |
565 | { |
566 | bool updated = set_range_info (name, r); |
567 | if (!updated || !dump_file) |
568 | continue; |
569 | |
570 | if (print_header) |
571 | { |
572 | /* Print the header only when there's something else |
573 | to print below. */ |
574 | fprintf (stream: dump_file, format: "Exported global range table:\n" ); |
575 | fprintf (stream: dump_file, format: "============================\n" ); |
576 | print_header = false; |
577 | } |
578 | |
579 | print_generic_expr (dump_file, name , TDF_SLIM); |
580 | fprintf (stream: dump_file, format: " : " ); |
581 | r.dump (dump_file); |
582 | fprintf (stream: dump_file, format: "\n" ); |
583 | } |
584 | } |
585 | } |
586 | |
587 | // Print the known table values to file F. |
588 | |
589 | void |
590 | gimple_ranger::dump_bb (FILE *f, basic_block bb) |
591 | { |
592 | unsigned x; |
593 | edge_iterator ei; |
594 | edge e; |
595 | fprintf (stream: f, format: "\n=========== BB %d ============\n" , bb->index); |
596 | m_cache.dump_bb (f, bb); |
597 | |
598 | ::dump_bb (f, bb, 4, TDF_NONE); |
599 | |
600 | // Now find any globals defined in this block. |
601 | for (x = 1; x < num_ssa_names; x++) |
602 | { |
603 | tree name = ssa_name (x); |
604 | if (!gimple_range_ssa_p (exp: name) || !SSA_NAME_DEF_STMT (name)) |
605 | continue; |
606 | Value_Range range (TREE_TYPE (name)); |
607 | if (gimple_bb (SSA_NAME_DEF_STMT (name)) == bb |
608 | && m_cache.get_global_range (r&: range, name)) |
609 | { |
610 | if (!range.varying_p ()) |
611 | { |
612 | print_generic_expr (f, name, TDF_SLIM); |
613 | fprintf (stream: f, format: " : " ); |
614 | range.dump (f); |
615 | fprintf (stream: f, format: "\n" ); |
616 | } |
617 | |
618 | } |
619 | } |
620 | |
621 | // And now outgoing edges, if they define anything. |
622 | FOR_EACH_EDGE (e, ei, bb->succs) |
623 | { |
624 | for (x = 1; x < num_ssa_names; x++) |
625 | { |
626 | tree name = gimple_range_ssa_p (ssa_name (x)); |
627 | if (!name || !gori ().has_edge_range_p (name, e)) |
628 | continue; |
629 | |
630 | Value_Range range (TREE_TYPE (name)); |
631 | if (m_cache.range_on_edge (r&: range, e, expr: name)) |
632 | { |
633 | gimple *s = SSA_NAME_DEF_STMT (name); |
634 | Value_Range tmp_range (TREE_TYPE (name)); |
635 | // Only print the range if this is the def block, or |
636 | // the on entry cache for either end of the edge is |
637 | // set. |
638 | if ((s && bb == gimple_bb (g: s)) || |
639 | m_cache.block_range (r&: tmp_range, bb, name, calc: false) || |
640 | m_cache.block_range (r&: tmp_range, bb: e->dest, name, calc: false)) |
641 | { |
642 | if (!range.varying_p ()) |
643 | { |
644 | fprintf (stream: f, format: "%d->%d " , e->src->index, |
645 | e->dest->index); |
646 | char c = ' '; |
647 | if (e->flags & EDGE_TRUE_VALUE) |
648 | fprintf (stream: f, format: " (T)%c" , c); |
649 | else if (e->flags & EDGE_FALSE_VALUE) |
650 | fprintf (stream: f, format: " (F)%c" , c); |
651 | else |
652 | fprintf (stream: f, format: " " ); |
653 | print_generic_expr (f, name, TDF_SLIM); |
654 | fprintf(stream: f, format: " : \t" ); |
655 | range.dump(f); |
656 | fprintf (stream: f, format: "\n" ); |
657 | } |
658 | } |
659 | } |
660 | } |
661 | } |
662 | } |
663 | |
664 | // Print the known table values to file F. |
665 | |
666 | void |
667 | gimple_ranger::dump (FILE *f) |
668 | { |
669 | basic_block bb; |
670 | |
671 | FOR_EACH_BB_FN (bb, cfun) |
672 | dump_bb (f, bb); |
673 | |
674 | m_cache.dump (f); |
675 | } |
676 | |
677 | void |
678 | gimple_ranger::debug () |
679 | { |
680 | dump (stderr); |
681 | } |
682 | |
683 | /* Create a new ranger instance and associate it with function FUN. |
684 | Each call must be paired with a call to disable_ranger to release |
685 | resources. */ |
686 | |
687 | gimple_ranger * |
688 | enable_ranger (struct function *fun, bool use_imm_uses) |
689 | { |
690 | gimple_ranger *r; |
691 | |
692 | bitmap_obstack_initialize (NULL); |
693 | |
694 | gcc_checking_assert (!fun->x_range_query); |
695 | r = new gimple_ranger (use_imm_uses); |
696 | fun->x_range_query = r; |
697 | |
698 | return r; |
699 | } |
700 | |
701 | /* Destroy and release the ranger instance associated with function FUN |
702 | and replace it the global ranger. */ |
703 | |
704 | void |
705 | disable_ranger (struct function *fun) |
706 | { |
707 | gcc_checking_assert (fun->x_range_query); |
708 | delete fun->x_range_query; |
709 | fun->x_range_query = NULL; |
710 | |
711 | bitmap_obstack_release (NULL); |
712 | } |
713 | |
714 | // ------------------------------------------------------------------------ |
715 | |
716 | // If there is a non-varying value associated with NAME, return true and the |
717 | // range in R. |
718 | |
719 | bool |
720 | assume_query::assume_range_p (vrange &r, tree name) |
721 | { |
722 | if (global.get_range (r, name)) |
723 | return !r.varying_p (); |
724 | return false; |
725 | } |
726 | |
727 | // Query used by GORI to pick up any known value on entry to a block. |
728 | |
729 | bool |
730 | assume_query::range_of_expr (vrange &r, tree expr, gimple *stmt) |
731 | { |
732 | if (!gimple_range_ssa_p (exp: expr)) |
733 | return get_tree_range (v&: r, expr, stmt); |
734 | |
735 | if (!global.get_range (r, name: expr)) |
736 | r.set_varying (TREE_TYPE (expr)); |
737 | return true; |
738 | } |
739 | |
740 | // If the current function returns an integral value, and has a single return |
741 | // statement, it will calculate any SSA_NAMES it can determine ranges for |
742 | // assuming the function returns 1. |
743 | |
744 | assume_query::assume_query () |
745 | { |
746 | basic_block exit_bb = EXIT_BLOCK_PTR_FOR_FN (cfun); |
747 | if (single_pred_p (bb: exit_bb)) |
748 | { |
749 | basic_block bb = single_pred (bb: exit_bb); |
750 | gimple_stmt_iterator gsi = gsi_last_nondebug_bb (bb); |
751 | if (gsi_end_p (i: gsi)) |
752 | return; |
753 | gimple *s = gsi_stmt (i: gsi); |
754 | if (!is_a<greturn *> (p: s)) |
755 | return; |
756 | greturn *gret = as_a<greturn *> (p: s); |
757 | tree op = gimple_return_retval (gs: gret); |
758 | if (!gimple_range_ssa_p (exp: op)) |
759 | return; |
760 | tree lhs_type = TREE_TYPE (op); |
761 | if (!irange::supports_p (type: lhs_type)) |
762 | return; |
763 | |
764 | unsigned prec = TYPE_PRECISION (lhs_type); |
765 | int_range<2> lhs_range (lhs_type, wi::one (precision: prec), wi::one (precision: prec)); |
766 | global.set_range (name: op, r: lhs_range); |
767 | |
768 | gimple *def = SSA_NAME_DEF_STMT (op); |
769 | if (!def || gimple_get_lhs (def) != op) |
770 | return; |
771 | fur_stmt src (gret, this); |
772 | calculate_stmt (s: def, lhs_range, src); |
773 | } |
774 | } |
775 | |
776 | // Evaluate operand OP on statement S, using the provided LHS range. |
777 | // If successful, set the range in the global table, then visit OP's def stmt. |
778 | |
779 | void |
780 | assume_query::calculate_op (tree op, gimple *s, vrange &lhs, fur_source &src) |
781 | { |
782 | Value_Range op_range (TREE_TYPE (op)); |
783 | if (m_gori.compute_operand_range (r&: op_range, stmt: s, lhs, name: op, src) |
784 | && !op_range.varying_p ()) |
785 | { |
786 | // Set the global range, merging if there is already a range. |
787 | global.merge_range (name: op, r: op_range); |
788 | gimple *def_stmt = SSA_NAME_DEF_STMT (op); |
789 | if (def_stmt && gimple_get_lhs (def_stmt) == op) |
790 | calculate_stmt (s: def_stmt, lhs_range&: op_range, src); |
791 | } |
792 | } |
793 | |
794 | // Evaluate PHI statement, using the provided LHS range. |
795 | // Check each constant argument predecessor if it can be taken |
796 | // provide LHS to any symbolic arguments, and process their def statements. |
797 | |
798 | void |
799 | assume_query::calculate_phi (gphi *phi, vrange &lhs_range, fur_source &src) |
800 | { |
801 | for (unsigned x= 0; x < gimple_phi_num_args (gs: phi); x++) |
802 | { |
803 | tree arg = gimple_phi_arg_def (gs: phi, index: x); |
804 | Value_Range arg_range (TREE_TYPE (arg)); |
805 | if (gimple_range_ssa_p (exp: arg)) |
806 | { |
807 | // A symbol arg will be the LHS value. |
808 | arg_range = lhs_range; |
809 | range_cast (r&: arg_range, TREE_TYPE (arg)); |
810 | if (!global.get_range (r&: arg_range, name: arg)) |
811 | { |
812 | global.set_range (name: arg, r: arg_range); |
813 | gimple *def_stmt = SSA_NAME_DEF_STMT (arg); |
814 | if (def_stmt && gimple_get_lhs (def_stmt) == arg) |
815 | calculate_stmt (s: def_stmt, lhs_range&: arg_range, src); |
816 | } |
817 | } |
818 | else if (get_tree_range (v&: arg_range, expr: arg, NULL)) |
819 | { |
820 | // If this is a constant value that differs from LHS, this |
821 | // edge cannot be taken. |
822 | arg_range.intersect (r: lhs_range); |
823 | if (arg_range.undefined_p ()) |
824 | continue; |
825 | // Otherwise check the condition feeding this edge. |
826 | edge e = gimple_phi_arg_edge (phi, i: x); |
827 | check_taken_edge (e, src); |
828 | } |
829 | } |
830 | } |
831 | |
832 | // If an edge is known to be taken, examine the outgoing edge to see |
833 | // if it carries any range information that can also be evaluated. |
834 | |
835 | void |
836 | assume_query::check_taken_edge (edge e, fur_source &src) |
837 | { |
838 | gimple *stmt = gimple_outgoing_range_stmt_p (bb: e->src); |
839 | if (stmt && is_a<gcond *> (p: stmt)) |
840 | { |
841 | int_range<2> cond; |
842 | gcond_edge_range (r&: cond, e); |
843 | calculate_stmt (s: stmt, lhs_range&: cond, src); |
844 | } |
845 | } |
846 | |
847 | // Evaluate statement S which produces range LHS_RANGE. |
848 | |
849 | void |
850 | assume_query::calculate_stmt (gimple *s, vrange &lhs_range, fur_source &src) |
851 | { |
852 | gimple_range_op_handler handler (s); |
853 | if (handler) |
854 | { |
855 | tree op = gimple_range_ssa_p (exp: handler.operand1 ()); |
856 | if (op) |
857 | calculate_op (op, s, lhs&: lhs_range, src); |
858 | op = gimple_range_ssa_p (exp: handler.operand2 ()); |
859 | if (op) |
860 | calculate_op (op, s, lhs&: lhs_range, src); |
861 | } |
862 | else if (is_a<gphi *> (p: s)) |
863 | { |
864 | calculate_phi (phi: as_a<gphi *> (p: s), lhs_range, src); |
865 | // Don't further check predecessors of blocks with PHIs. |
866 | return; |
867 | } |
868 | |
869 | // Even if the walk back terminates before the top, if this is a single |
870 | // predecessor block, see if the predecessor provided any ranges to get here. |
871 | if (single_pred_p (bb: gimple_bb (g: s))) |
872 | check_taken_edge (e: single_pred_edge (bb: gimple_bb (g: s)), src); |
873 | } |
874 | |
875 | // Show everything that was calculated. |
876 | |
877 | void |
878 | assume_query::dump (FILE *f) |
879 | { |
880 | fprintf (stream: f, format: "Assumption details calculated:\n" ); |
881 | for (unsigned i = 0; i < num_ssa_names; i++) |
882 | { |
883 | tree name = ssa_name (i); |
884 | if (!name || !gimple_range_ssa_p (exp: name)) |
885 | continue; |
886 | tree type = TREE_TYPE (name); |
887 | if (!Value_Range::supports_type_p (type)) |
888 | continue; |
889 | |
890 | Value_Range assume_range (type); |
891 | if (assume_range_p (r&: assume_range, name)) |
892 | { |
893 | print_generic_expr (f, name, TDF_SLIM); |
894 | fprintf (stream: f, format: " -> " ); |
895 | assume_range.dump (f); |
896 | fputc (c: '\n', stream: f); |
897 | } |
898 | } |
899 | fprintf (stream: f, format: "------------------------------\n" ); |
900 | } |
901 | |
902 | // --------------------------------------------------------------------------- |
903 | |
904 | |
905 | // Create a DOM based ranger for use by a DOM walk pass. |
906 | |
907 | dom_ranger::dom_ranger () : m_global (), m_out () |
908 | { |
909 | m_freelist.create (nelems: 0); |
910 | m_freelist.truncate (size: 0); |
911 | m_e0.create (nelems: 0); |
912 | m_e0.safe_grow_cleared (last_basic_block_for_fn (cfun)); |
913 | m_e1.create (nelems: 0); |
914 | m_e1.safe_grow_cleared (last_basic_block_for_fn (cfun)); |
915 | m_pop_list = BITMAP_ALLOC (NULL); |
916 | if (dump_file && (param_ranger_debug & RANGER_DEBUG_TRACE)) |
917 | tracer.enable_trace (); |
918 | } |
919 | |
920 | // Dispose of a DOM ranger. |
921 | |
922 | dom_ranger::~dom_ranger () |
923 | { |
924 | if (dump_file && (dump_flags & TDF_DETAILS)) |
925 | { |
926 | fprintf (stream: dump_file, format: "Non-varying global ranges:\n" ); |
927 | fprintf (stream: dump_file, format: "=========================:\n" ); |
928 | m_global.dump (f: dump_file); |
929 | } |
930 | BITMAP_FREE (m_pop_list); |
931 | m_e1.release (); |
932 | m_e0.release (); |
933 | m_freelist.release (); |
934 | } |
935 | |
936 | // Implement range of EXPR on stmt S, and return it in R. |
937 | // Return false if no range can be calculated. |
938 | |
939 | bool |
940 | dom_ranger::range_of_expr (vrange &r, tree expr, gimple *s) |
941 | { |
942 | unsigned idx; |
943 | if (!gimple_range_ssa_p (exp: expr)) |
944 | return get_tree_range (v&: r, expr, stmt: s); |
945 | |
946 | if ((idx = tracer.header (str: "range_of_expr " ))) |
947 | { |
948 | print_generic_expr (dump_file, expr, TDF_SLIM); |
949 | if (s) |
950 | { |
951 | fprintf (stream: dump_file, format: " at " ); |
952 | print_gimple_stmt (dump_file, s, 0, TDF_SLIM); |
953 | } |
954 | else |
955 | fprintf (stream: dump_file, format: "\n" ); |
956 | } |
957 | |
958 | if (s) |
959 | range_in_bb (r, bb: gimple_bb (g: s), name: expr); |
960 | else |
961 | m_global.range_of_expr (r, expr, stmt: s); |
962 | |
963 | if (idx) |
964 | tracer.trailer (counter: idx, caller: " " , result: true, name: expr, r); |
965 | return true; |
966 | } |
967 | |
968 | |
969 | // Return TRUE and the range if edge E has a range set for NAME in |
970 | // block E->src. |
971 | |
972 | bool |
973 | dom_ranger::edge_range (vrange &r, edge e, tree name) |
974 | { |
975 | bool ret = false; |
976 | basic_block bb = e->src; |
977 | |
978 | // Check if BB has any outgoing ranges on edge E. |
979 | ssa_lazy_cache *out = NULL; |
980 | if (EDGE_SUCC (bb, 0) == e) |
981 | out = m_e0[bb->index]; |
982 | else if (EDGE_SUCC (bb, 1) == e) |
983 | out = m_e1[bb->index]; |
984 | |
985 | // If there is an edge vector and it has a range, pick it up. |
986 | if (out && out->has_range (name)) |
987 | ret = out->get_range (r, name); |
988 | |
989 | return ret; |
990 | } |
991 | |
992 | |
993 | // Return the range of EXPR on edge E in R. |
994 | // Return false if no range can be calculated. |
995 | |
996 | bool |
997 | dom_ranger::range_on_edge (vrange &r, edge e, tree expr) |
998 | { |
999 | basic_block bb = e->src; |
1000 | unsigned idx; |
1001 | if ((idx = tracer.header (str: "range_on_edge " ))) |
1002 | { |
1003 | fprintf (stream: dump_file, format: "%d->%d for " ,e->src->index, e->dest->index); |
1004 | print_generic_expr (dump_file, expr, TDF_SLIM); |
1005 | fputc (c: '\n',stream: dump_file); |
1006 | } |
1007 | |
1008 | if (!gimple_range_ssa_p (exp: expr)) |
1009 | return get_tree_range (v&: r, expr, NULL); |
1010 | |
1011 | if (!edge_range (r, e, name: expr)) |
1012 | range_in_bb (r, bb, name: expr); |
1013 | |
1014 | if (idx) |
1015 | tracer.trailer (counter: idx, caller: " " , result: true, name: expr, r); |
1016 | return true; |
1017 | } |
1018 | |
1019 | // Return the range of NAME as it exists at the end of block BB in R. |
1020 | |
1021 | void |
1022 | dom_ranger::range_in_bb (vrange &r, basic_block bb, tree name) |
1023 | { |
1024 | basic_block def_bb = gimple_bb (SSA_NAME_DEF_STMT (name)); |
1025 | // Loop through dominators until we get to the entry block, or we find |
1026 | // either the defintion block for NAME, or a single pred edge with a range. |
1027 | while (bb != ENTRY_BLOCK_PTR_FOR_FN (cfun)) |
1028 | { |
1029 | // If we hit the deifntion block, pick up the global value. |
1030 | if (bb == def_bb) |
1031 | { |
1032 | m_global.range_of_expr (r, expr: name); |
1033 | return; |
1034 | } |
1035 | // If its a single pred, check the outgoing range of the edge. |
1036 | if (EDGE_COUNT (bb->preds) == 1 |
1037 | && edge_range (r, EDGE_PRED (bb, 0), name)) |
1038 | return; |
1039 | // Otherwise move up to the dominator, and check again. |
1040 | bb = get_immediate_dominator (CDI_DOMINATORS, bb); |
1041 | } |
1042 | m_global.range_of_expr (r, expr: name); |
1043 | } |
1044 | |
1045 | |
1046 | // Calculate the range of NAME, as the def of stmt S and return it in R. |
1047 | // Return FALSE if no range cqn be calculated. |
1048 | // Also set the global range for NAME as this should only be called within |
1049 | // the def block during a DOM walk. |
1050 | // Outgoing edges were pre-calculated, so when we establish a global defintion |
1051 | // check if any outgoing edges hav ranges that can be combined with the |
1052 | // global. |
1053 | |
1054 | bool |
1055 | dom_ranger::range_of_stmt (vrange &r, gimple *s, tree name) |
1056 | { |
1057 | unsigned idx; |
1058 | bool ret; |
1059 | if (!name) |
1060 | name = gimple_range_ssa_p (exp: gimple_get_lhs (s)); |
1061 | |
1062 | gcc_checking_assert (!name || name == gimple_get_lhs (s)); |
1063 | |
1064 | if ((idx = tracer.header (str: "range_of_stmt " ))) |
1065 | print_gimple_stmt (dump_file, s, 0, TDF_SLIM); |
1066 | |
1067 | // Its already been calculated. |
1068 | if (name && m_global.has_range (name)) |
1069 | { |
1070 | ret = m_global.range_of_expr (r, expr: name, stmt: s); |
1071 | if (idx) |
1072 | tracer.trailer (counter: idx, caller: " Already had value " , result: ret, name, r); |
1073 | return ret; |
1074 | } |
1075 | |
1076 | // If there is a new calculated range and it is not varying, set |
1077 | // a global range. |
1078 | ret = fold_range (r, s, q: this); |
1079 | if (ret && name && m_global.merge_range (name, r) && !r.varying_p ()) |
1080 | { |
1081 | if (set_range_info (name, r) && dump_file) |
1082 | { |
1083 | fprintf (stream: dump_file, format: "Global Exported: " ); |
1084 | print_generic_expr (dump_file, name, TDF_SLIM); |
1085 | fprintf (stream: dump_file, format: " = " ); |
1086 | r.dump (dump_file); |
1087 | fputc (c: '\n', stream: dump_file); |
1088 | } |
1089 | basic_block bb = gimple_bb (g: s); |
1090 | unsigned bbi = bb->index; |
1091 | Value_Range vr (TREE_TYPE (name)); |
1092 | // If there is a range on edge 0, update it. |
1093 | if (m_e0[bbi] && m_e0[bbi]->has_range (name)) |
1094 | { |
1095 | if (m_e0[bbi]->merge_range (name, r) && dump_file |
1096 | && (dump_flags & TDF_DETAILS)) |
1097 | { |
1098 | fprintf (stream: dump_file, format: "Outgoing range for " ); |
1099 | print_generic_expr (dump_file, name, TDF_SLIM); |
1100 | fprintf (stream: dump_file, format: " updated on edge %d->%d : " , bbi, |
1101 | EDGE_SUCC (bb, 0)->dest->index); |
1102 | if (m_e0[bbi]->get_range (r&: vr, name)) |
1103 | vr.dump (dump_file); |
1104 | fputc (c: '\n', stream: dump_file); |
1105 | } |
1106 | } |
1107 | // If there is a range on edge 1, update it. |
1108 | if (m_e1[bbi] && m_e1[bbi]->has_range (name)) |
1109 | { |
1110 | if (m_e1[bbi]->merge_range (name, r) && dump_file |
1111 | && (dump_flags & TDF_DETAILS)) |
1112 | { |
1113 | fprintf (stream: dump_file, format: "Outgoing range for " ); |
1114 | print_generic_expr (dump_file, name, TDF_SLIM); |
1115 | fprintf (stream: dump_file, format: " updated on edge %d->%d : " , bbi, |
1116 | EDGE_SUCC (bb, 1)->dest->index); |
1117 | if (m_e1[bbi]->get_range (r&: vr, name)) |
1118 | vr.dump (dump_file); |
1119 | fputc (c: '\n', stream: dump_file); |
1120 | } |
1121 | } |
1122 | } |
1123 | if (idx) |
1124 | tracer.trailer (counter: idx, caller: " " , result: ret, name, r); |
1125 | return ret; |
1126 | } |
1127 | |
1128 | // Check if GORI has an ranges on edge E. If there re, store them in |
1129 | // either the E0 or E1 vector based on EDGE_0. |
1130 | // If there are no ranges, put the empty lazy_cache entry on the freelist |
1131 | // for use next time. |
1132 | |
1133 | void |
1134 | dom_ranger::maybe_push_edge (edge e, bool edge_0) |
1135 | { |
1136 | ssa_lazy_cache *e_cache; |
1137 | if (!m_freelist.is_empty ()) |
1138 | e_cache = m_freelist.pop (); |
1139 | else |
1140 | e_cache = new ssa_lazy_cache; |
1141 | gori_on_edge (r&: *e_cache, e, query: this, ogr: &m_out); |
1142 | if (e_cache->empty_p ()) |
1143 | m_freelist.safe_push (obj: e_cache); |
1144 | else |
1145 | { |
1146 | if (edge_0) |
1147 | m_e0[e->src->index] = e_cache; |
1148 | else |
1149 | m_e1[e->src->index] = e_cache; |
1150 | } |
1151 | } |
1152 | |
1153 | // Preprocess block BB. If there are any outgoing edges, precalculate |
1154 | // the outgoing ranges and store them. Note these are done before |
1155 | // we process the block, so global values have not been set yet. |
1156 | // These are "pure" outgoing ranges inflicted by the condition. |
1157 | |
1158 | void |
1159 | dom_ranger::pre_bb (basic_block bb) |
1160 | { |
1161 | if (dump_file && (dump_flags & TDF_DETAILS)) |
1162 | fprintf (stream: dump_file, format: "#FVRP entering BB %d\n" , bb->index); |
1163 | |
1164 | // Next, see if this block needs outgoing edges calculated. |
1165 | gimple_stmt_iterator gsi = gsi_last_nondebug_bb (bb); |
1166 | if (!gsi_end_p (i: gsi)) |
1167 | { |
1168 | gimple *s = gsi_stmt (i: gsi); |
1169 | if (is_a<gcond *> (p: s) && gimple_range_op_handler::supported_p (s)) |
1170 | { |
1171 | maybe_push_edge (EDGE_SUCC (bb, 0), edge_0: true); |
1172 | maybe_push_edge (EDGE_SUCC (bb, 1), edge_0: false); |
1173 | |
1174 | if (dump_file && (dump_flags & TDF_DETAILS)) |
1175 | { |
1176 | if (m_e0[bb->index]) |
1177 | { |
1178 | fprintf (stream: dump_file, format: "\nEdge ranges BB %d->%d\n" , |
1179 | bb->index, EDGE_SUCC (bb, 0)->dest->index); |
1180 | m_e0[bb->index]->dump(f: dump_file); |
1181 | } |
1182 | if (m_e1[bb->index]) |
1183 | { |
1184 | fprintf (stream: dump_file, format: "\nEdge ranges BB %d->%d\n" , |
1185 | bb->index, EDGE_SUCC (bb, 1)->dest->index); |
1186 | m_e1[bb->index]->dump(f: dump_file); |
1187 | } |
1188 | } |
1189 | } |
1190 | } |
1191 | if (dump_file && (dump_flags & TDF_DETAILS)) |
1192 | fprintf (stream: dump_file, format: "#FVRP DONE entering BB %d\n" , bb->index); |
1193 | } |
1194 | |
1195 | // Perform any post block processing. |
1196 | |
1197 | void |
1198 | dom_ranger::post_bb (basic_block) |
1199 | { |
1200 | } |
1201 | |