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cca78449 | 1 | /* Support routines for value ranges. |
8d9254fc | 2 | Copyright (C) 2019-2020 Free Software Foundation, Inc. |
4ba9fb0a AH |
3 | Major hacks by Aldy Hernandez <aldyh@redhat.com> and |
4 | Andrew MacLeod <amacleod@redhat.com>. | |
cca78449 AH |
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 "tree-pretty-print.h" | |
30 | #include "fold-const.h" | |
31 | ||
4ba9fb0a AH |
32 | // Here we copy between any two irange's. The ranges can be legacy or |
33 | // multi-ranges, and copying between any combination works correctly. | |
34 | ||
35 | irange & | |
36 | irange::operator= (const irange &src) | |
37 | { | |
5bcd7de6 | 38 | if (legacy_mode_p ()) |
4ba9fb0a | 39 | { |
5bcd7de6 | 40 | copy_to_legacy (src); |
4ba9fb0a AH |
41 | return *this; |
42 | } | |
5bcd7de6 | 43 | if (src.legacy_mode_p ()) |
4ba9fb0a | 44 | { |
5bcd7de6 | 45 | copy_legacy_to_multi_range (src); |
4ba9fb0a AH |
46 | return *this; |
47 | } | |
48 | ||
49 | unsigned x; | |
50 | unsigned lim = src.m_num_ranges; | |
51 | if (lim > m_max_ranges) | |
52 | lim = m_max_ranges; | |
53 | ||
54 | for (x = 0; x < lim * 2; ++x) | |
55 | m_base[x] = src.m_base[x]; | |
56 | ||
57 | // If the range didn't fit, the last range should cover the rest. | |
58 | if (lim != src.m_num_ranges) | |
59 | m_base[x - 1] = src.m_base[src.m_num_ranges * 2 - 1]; | |
60 | ||
61 | m_num_ranges = lim; | |
62 | return *this; | |
63 | } | |
64 | ||
65 | // Return TRUE if range is a multi-range that can be represented as a | |
66 | // VR_ANTI_RANGE. | |
67 | ||
68 | bool | |
69 | irange::maybe_anti_range () const | |
cca78449 | 70 | { |
4ba9fb0a AH |
71 | tree ttype = type (); |
72 | unsigned int precision = TYPE_PRECISION (ttype); | |
73 | signop sign = TYPE_SIGN (ttype); | |
74 | return (num_pairs () > 1 | |
75 | && precision > 1 | |
76 | && lower_bound () == wi::min_value (precision, sign) | |
77 | && upper_bound () == wi::max_value (precision, sign)); | |
cca78449 AH |
78 | } |
79 | ||
4ba9fb0a | 80 | void |
5bcd7de6 | 81 | irange::copy_legacy_to_multi_range (const irange &src) |
cca78449 | 82 | { |
5bcd7de6 AH |
83 | gcc_checking_assert (src.legacy_mode_p ()); |
84 | gcc_checking_assert (!legacy_mode_p ()); | |
4ba9fb0a AH |
85 | if (src.undefined_p ()) |
86 | set_undefined (); | |
87 | else if (src.varying_p ()) | |
88 | set_varying (src.type ()); | |
4ba9fb0a | 89 | else |
80cbca32 | 90 | { |
5bcd7de6 AH |
91 | if (range_has_numeric_bounds_p (&src)) |
92 | set (src.min (), src.max (), src.kind ()); | |
93 | else | |
80cbca32 AH |
94 | { |
95 | value_range cst (src); | |
96 | cst.normalize_symbolics (); | |
5bcd7de6 | 97 | gcc_checking_assert (cst.varying_p () || cst.kind () == VR_RANGE); |
80cbca32 | 98 | set (cst.min (), cst.max ()); |
80cbca32 | 99 | } |
80cbca32 | 100 | } |
cca78449 AH |
101 | } |
102 | ||
5bcd7de6 AH |
103 | // Copy any type of irange into a legacy. |
104 | ||
105 | void | |
106 | irange::copy_to_legacy (const irange &src) | |
107 | { | |
108 | gcc_checking_assert (legacy_mode_p ()); | |
109 | // Copy legacy to legacy. | |
110 | if (src.legacy_mode_p ()) | |
111 | { | |
112 | m_num_ranges = src.m_num_ranges; | |
113 | m_base[0] = src.m_base[0]; | |
114 | m_base[1] = src.m_base[1]; | |
115 | m_kind = src.m_kind; | |
116 | return; | |
117 | } | |
118 | // Copy multi-range to legacy. | |
119 | if (src.undefined_p ()) | |
120 | set_undefined (); | |
121 | else if (src.varying_p ()) | |
122 | set_varying (src.type ()); | |
123 | else if (src.maybe_anti_range ()) | |
124 | { | |
125 | int_range<3> r (src); | |
126 | r.invert (); | |
127 | // Use tree variants to save on tree -> wi -> tree conversions. | |
128 | set (r.tree_lower_bound (0), r.tree_upper_bound (0), VR_ANTI_RANGE); | |
129 | } | |
130 | else | |
131 | set (src.tree_lower_bound (), src.tree_upper_bound ()); | |
132 | } | |
133 | ||
4e85ad79 | 134 | // Swap MIN/MAX if they are out of order and adjust KIND appropriately. |
4ba9fb0a | 135 | |
4e85ad79 AH |
136 | static void |
137 | swap_out_of_order_endpoints (tree &min, tree &max, value_range_kind &kind) | |
cca78449 | 138 | { |
4e85ad79 AH |
139 | gcc_checking_assert (kind != VR_UNDEFINED); |
140 | if (kind == VR_VARYING) | |
141 | return; | |
4ba9fb0a AH |
142 | /* Wrong order for min and max, to swap them and the VR type we need |
143 | to adjust them. */ | |
144 | if (tree_int_cst_lt (max, min)) | |
145 | { | |
146 | tree one, tmp; | |
147 | ||
148 | /* For one bit precision if max < min, then the swapped | |
149 | range covers all values, so for VR_RANGE it is varying and | |
150 | for VR_ANTI_RANGE empty range, so drop to varying as well. */ | |
151 | if (TYPE_PRECISION (TREE_TYPE (min)) == 1) | |
152 | { | |
4e85ad79 AH |
153 | kind = VR_VARYING; |
154 | return; | |
4ba9fb0a AH |
155 | } |
156 | ||
157 | one = build_int_cst (TREE_TYPE (min), 1); | |
158 | tmp = int_const_binop (PLUS_EXPR, max, one); | |
159 | max = int_const_binop (MINUS_EXPR, min, one); | |
160 | min = tmp; | |
161 | ||
162 | /* There's one corner case, if we had [C+1, C] before we now have | |
163 | that again. But this represents an empty value range, so drop | |
164 | to varying in this case. */ | |
165 | if (tree_int_cst_lt (max, min)) | |
166 | { | |
4e85ad79 AH |
167 | kind = VR_VARYING; |
168 | return; | |
4ba9fb0a AH |
169 | } |
170 | kind = kind == VR_RANGE ? VR_ANTI_RANGE : VR_RANGE; | |
171 | } | |
cca78449 AH |
172 | } |
173 | ||
174 | void | |
4ba9fb0a | 175 | irange::irange_set (tree min, tree max) |
cca78449 | 176 | { |
4ba9fb0a AH |
177 | gcc_checking_assert (!POLY_INT_CST_P (min)); |
178 | gcc_checking_assert (!POLY_INT_CST_P (max)); | |
179 | ||
180 | m_base[0] = min; | |
181 | m_base[1] = max; | |
182 | m_num_ranges = 1; | |
183 | if (flag_checking) | |
184 | verify_range (); | |
cca78449 AH |
185 | } |
186 | ||
187 | void | |
4ba9fb0a | 188 | irange::irange_set_anti_range (tree min, tree max) |
cca78449 | 189 | { |
4ba9fb0a AH |
190 | gcc_checking_assert (!POLY_INT_CST_P (min)); |
191 | gcc_checking_assert (!POLY_INT_CST_P (max)); | |
192 | ||
193 | // set an anti-range | |
194 | tree type = TREE_TYPE (min); | |
195 | signop sign = TYPE_SIGN (type); | |
196 | int_range<2> type_range (type); | |
197 | // Calculate INVERSE([I,J]) as [-MIN, I-1][J+1, +MAX]. | |
198 | m_num_ranges = 0; | |
199 | wi::overflow_type ovf; | |
200 | ||
201 | wide_int w_min = wi::to_wide (min); | |
202 | if (wi::ne_p (w_min, type_range.lower_bound ())) | |
cca78449 | 203 | { |
4ba9fb0a AH |
204 | wide_int lim1 = wi::sub (w_min, 1, sign, &ovf); |
205 | gcc_checking_assert (ovf != wi::OVF_OVERFLOW); | |
206 | m_base[0] = type_range.tree_lower_bound (0); | |
207 | m_base[1] = wide_int_to_tree (type, lim1); | |
208 | m_num_ranges = 1; | |
cca78449 | 209 | } |
4ba9fb0a AH |
210 | wide_int w_max = wi::to_wide (max); |
211 | if (wi::ne_p (w_max, type_range.upper_bound ())) | |
212 | { | |
213 | wide_int lim2 = wi::add (w_max, 1, sign, &ovf); | |
214 | gcc_checking_assert (ovf != wi::OVF_OVERFLOW); | |
215 | m_base[m_num_ranges * 2] = wide_int_to_tree (type, lim2); | |
216 | m_base[m_num_ranges * 2 + 1] = type_range.tree_upper_bound (0); | |
217 | ++m_num_ranges; | |
218 | } | |
219 | if (flag_checking) | |
220 | verify_range (); | |
cca78449 AH |
221 | } |
222 | ||
223 | /* Set value range to the canonical form of {VRTYPE, MIN, MAX, EQUIV}. | |
224 | This means adjusting VRTYPE, MIN and MAX representing the case of a | |
225 | wrapping range with MAX < MIN covering [MIN, type_max] U [type_min, MAX] | |
226 | as anti-rage ~[MAX+1, MIN-1]. Likewise for wrapping anti-ranges. | |
227 | In corner cases where MAX+1 or MIN-1 wraps this will fall back | |
228 | to varying. | |
229 | This routine exists to ease canonicalization in the case where we | |
230 | extract ranges from var + CST op limit. */ | |
231 | ||
232 | void | |
4ba9fb0a | 233 | irange::set (tree min, tree max, value_range_kind kind) |
cca78449 | 234 | { |
4ba9fb0a AH |
235 | if (!legacy_mode_p ()) |
236 | { | |
237 | if (kind == VR_RANGE) | |
238 | irange_set (min, max); | |
239 | else | |
240 | { | |
241 | gcc_checking_assert (kind == VR_ANTI_RANGE); | |
242 | irange_set_anti_range (min, max); | |
243 | } | |
244 | return; | |
245 | } | |
cca78449 AH |
246 | if (kind == VR_UNDEFINED) |
247 | { | |
248 | set_undefined (); | |
249 | return; | |
250 | } | |
54ef7701 | 251 | |
5e41e7f0 AH |
252 | if (POLY_INT_CST_P (min) || POLY_INT_CST_P (max)) |
253 | { | |
254 | set_varying (TREE_TYPE (min)); | |
255 | return; | |
256 | } | |
54ef7701 | 257 | |
4ba9fb0a | 258 | // Nothing to canonicalize for symbolic ranges. |
cca78449 AH |
259 | if (TREE_CODE (min) != INTEGER_CST |
260 | || TREE_CODE (max) != INTEGER_CST) | |
261 | { | |
262 | m_kind = kind; | |
4ba9fb0a AH |
263 | m_base[0] = min; |
264 | m_base[1] = max; | |
265 | m_num_ranges = 1; | |
cca78449 AH |
266 | return; |
267 | } | |
4e85ad79 AH |
268 | |
269 | swap_out_of_order_endpoints (min, max, kind); | |
270 | if (kind == VR_VARYING) | |
271 | { | |
272 | set_varying (TREE_TYPE (min)); | |
273 | return; | |
274 | } | |
cca78449 | 275 | |
4ba9fb0a | 276 | // Anti-ranges that can be represented as ranges should be so. |
cca78449 AH |
277 | if (kind == VR_ANTI_RANGE) |
278 | { | |
279 | /* For -fstrict-enums we may receive out-of-range ranges so consider | |
280 | values < -INF and values > INF as -INF/INF as well. */ | |
281 | bool is_min = vrp_val_is_min (min); | |
282 | bool is_max = vrp_val_is_max (max); | |
4e85ad79 | 283 | tree type = TREE_TYPE (min); |
cca78449 AH |
284 | |
285 | if (is_min && is_max) | |
286 | { | |
287 | /* We cannot deal with empty ranges, drop to varying. | |
288 | ??? This could be VR_UNDEFINED instead. */ | |
289 | set_varying (type); | |
290 | return; | |
291 | } | |
292 | else if (TYPE_PRECISION (TREE_TYPE (min)) == 1 | |
293 | && (is_min || is_max)) | |
294 | { | |
295 | /* Non-empty boolean ranges can always be represented | |
296 | as a singleton range. */ | |
297 | if (is_min) | |
298 | min = max = vrp_val_max (TREE_TYPE (min)); | |
299 | else | |
300 | min = max = vrp_val_min (TREE_TYPE (min)); | |
301 | kind = VR_RANGE; | |
302 | } | |
303 | else if (is_min) | |
304 | { | |
305 | tree one = build_int_cst (TREE_TYPE (max), 1); | |
306 | min = int_const_binop (PLUS_EXPR, max, one); | |
307 | max = vrp_val_max (TREE_TYPE (max)); | |
308 | kind = VR_RANGE; | |
309 | } | |
310 | else if (is_max) | |
311 | { | |
312 | tree one = build_int_cst (TREE_TYPE (min), 1); | |
313 | max = int_const_binop (MINUS_EXPR, min, one); | |
314 | min = vrp_val_min (TREE_TYPE (min)); | |
315 | kind = VR_RANGE; | |
316 | } | |
317 | } | |
cca78449 | 318 | |
4e85ad79 AH |
319 | m_kind = kind; |
320 | m_base[0] = min; | |
321 | m_base[1] = max; | |
322 | m_num_ranges = 1; | |
323 | normalize_min_max (); | |
cca78449 | 324 | if (flag_checking) |
4ba9fb0a | 325 | verify_range (); |
cca78449 AH |
326 | } |
327 | ||
4e85ad79 | 328 | // Check the validity of the range. |
cca78449 AH |
329 | |
330 | void | |
4ba9fb0a | 331 | irange::verify_range () |
cca78449 | 332 | { |
4ba9fb0a | 333 | if (!legacy_mode_p ()) |
cca78449 | 334 | { |
4ba9fb0a AH |
335 | gcc_checking_assert (m_kind == VR_RANGE); |
336 | for (unsigned i = 0; i < m_num_ranges; ++i) | |
337 | { | |
338 | tree lb = tree_lower_bound (i); | |
339 | tree ub = tree_upper_bound (i); | |
340 | int c = compare_values (lb, ub); | |
341 | gcc_assert (c == 0 || c == -1); | |
342 | } | |
343 | return; | |
344 | } | |
cca78449 | 345 | |
4ba9fb0a AH |
346 | switch (m_kind) |
347 | { | |
cca78449 | 348 | case VR_UNDEFINED: |
4ba9fb0a | 349 | gcc_assert (m_num_ranges == 0); |
cca78449 | 350 | break; |
4ba9fb0a | 351 | |
cca78449 | 352 | case VR_VARYING: |
4ba9fb0a | 353 | gcc_assert (m_num_ranges == 1); |
cca78449 | 354 | break; |
4ba9fb0a AH |
355 | |
356 | case VR_ANTI_RANGE: | |
357 | case VR_RANGE: | |
358 | { | |
359 | gcc_assert (m_num_ranges == 1); | |
360 | int cmp = compare_values (tree_lower_bound (0), tree_upper_bound (0)); | |
361 | gcc_assert (cmp == 0 || cmp == -1 || cmp == -2); | |
362 | return; | |
363 | } | |
364 | ||
cca78449 AH |
365 | default: |
366 | gcc_unreachable (); | |
367 | } | |
368 | } | |
369 | ||
cca78449 | 370 | unsigned |
4ba9fb0a | 371 | irange::legacy_num_pairs () const |
cca78449 | 372 | { |
4ba9fb0a AH |
373 | gcc_checking_assert (legacy_mode_p ()); |
374 | ||
cca78449 AH |
375 | if (undefined_p ()) |
376 | return 0; | |
377 | if (varying_p ()) | |
378 | return 1; | |
4ba9fb0a AH |
379 | // Inlined symbolic_p for performance: |
380 | if (!is_gimple_min_invariant (min ()) || !is_gimple_min_invariant (max ())) | |
6ee86466 AH |
381 | { |
382 | value_range numeric_range (*this); | |
383 | numeric_range.normalize_symbolics (); | |
384 | return numeric_range.num_pairs (); | |
385 | } | |
cca78449 AH |
386 | if (m_kind == VR_ANTI_RANGE) |
387 | { | |
388 | // ~[MIN, X] has one sub-range of [X+1, MAX], and | |
389 | // ~[X, MAX] has one sub-range of [MIN, X-1]. | |
4ba9fb0a | 390 | if (vrp_val_is_min (min ()) || vrp_val_is_max (max ())) |
cca78449 AH |
391 | return 1; |
392 | return 2; | |
393 | } | |
4ba9fb0a | 394 | gcc_checking_assert (m_num_ranges == 1); |
cca78449 AH |
395 | return 1; |
396 | } | |
397 | ||
4ba9fb0a AH |
398 | // Return the lower bound for a sub-range. PAIR is the sub-range in |
399 | // question. | |
cca78449 AH |
400 | |
401 | wide_int | |
4ba9fb0a | 402 | irange::legacy_lower_bound (unsigned pair) const |
cca78449 | 403 | { |
4ba9fb0a | 404 | gcc_checking_assert (legacy_mode_p ()); |
cca78449 | 405 | if (symbolic_p ()) |
6ee86466 AH |
406 | { |
407 | value_range numeric_range (*this); | |
408 | numeric_range.normalize_symbolics (); | |
4ba9fb0a | 409 | return numeric_range.legacy_lower_bound (pair); |
6ee86466 | 410 | } |
cca78449 AH |
411 | gcc_checking_assert (!undefined_p ()); |
412 | gcc_checking_assert (pair + 1 <= num_pairs ()); | |
cca78449 AH |
413 | if (m_kind == VR_ANTI_RANGE) |
414 | { | |
4ba9fb0a AH |
415 | tree typ = type (), t; |
416 | if (pair == 1 || vrp_val_is_min (min ())) | |
417 | t = wide_int_to_tree (typ, wi::to_wide (max ()) + 1); | |
cca78449 AH |
418 | else |
419 | t = vrp_val_min (typ); | |
4ba9fb0a | 420 | return wi::to_wide (t); |
cca78449 | 421 | } |
4ba9fb0a | 422 | return wi::to_wide (tree_lower_bound (pair)); |
cca78449 AH |
423 | } |
424 | ||
4ba9fb0a AH |
425 | // Return the upper bound for a sub-range. PAIR is the sub-range in |
426 | // question. | |
cca78449 AH |
427 | |
428 | wide_int | |
4ba9fb0a | 429 | irange::legacy_upper_bound (unsigned pair) const |
cca78449 | 430 | { |
4ba9fb0a | 431 | gcc_checking_assert (legacy_mode_p ()); |
cca78449 | 432 | if (symbolic_p ()) |
6ee86466 AH |
433 | { |
434 | value_range numeric_range (*this); | |
435 | numeric_range.normalize_symbolics (); | |
4ba9fb0a | 436 | return numeric_range.legacy_upper_bound (pair); |
6ee86466 | 437 | } |
cca78449 AH |
438 | gcc_checking_assert (!undefined_p ()); |
439 | gcc_checking_assert (pair + 1 <= num_pairs ()); | |
cca78449 AH |
440 | if (m_kind == VR_ANTI_RANGE) |
441 | { | |
4ba9fb0a AH |
442 | tree typ = type (), t; |
443 | if (pair == 1 || vrp_val_is_min (min ())) | |
cca78449 AH |
444 | t = vrp_val_max (typ); |
445 | else | |
4ba9fb0a AH |
446 | t = wide_int_to_tree (typ, wi::to_wide (min ()) - 1); |
447 | return wi::to_wide (t); | |
cca78449 | 448 | } |
4ba9fb0a | 449 | return wi::to_wide (tree_upper_bound (pair)); |
cca78449 AH |
450 | } |
451 | ||
452 | bool | |
4ba9fb0a | 453 | irange::legacy_equal_p (const irange &other) const |
cca78449 | 454 | { |
4ba9fb0a | 455 | gcc_checking_assert (legacy_mode_p () && other.legacy_mode_p ()); |
cca78449 | 456 | |
4ba9fb0a AH |
457 | if (m_kind != other.m_kind) |
458 | return false; | |
459 | if (m_kind == VR_UNDEFINED || m_kind == VR_VARYING) | |
460 | return true; | |
461 | return (vrp_operand_equal_p (tree_lower_bound (0), | |
462 | other.tree_lower_bound (0)) | |
463 | && vrp_operand_equal_p (tree_upper_bound (0), | |
464 | other.tree_upper_bound (0))); | |
cca78449 AH |
465 | } |
466 | ||
467 | bool | |
4ba9fb0a | 468 | irange::equal_p (const irange &other) const |
cca78449 | 469 | { |
4ba9fb0a AH |
470 | if (legacy_mode_p ()) |
471 | { | |
472 | if (other.legacy_mode_p ()) | |
473 | return legacy_equal_p (other); | |
474 | value_range tmp (other); | |
475 | return legacy_equal_p (tmp); | |
476 | } | |
477 | if (other.legacy_mode_p ()) | |
478 | { | |
479 | value_range tmp2 (*this); | |
480 | return tmp2.legacy_equal_p (other); | |
481 | } | |
482 | ||
483 | if (m_num_ranges != other.m_num_ranges) | |
484 | return false; | |
485 | ||
486 | for (unsigned i = 0; i < m_num_ranges; ++i) | |
487 | { | |
488 | tree lb = tree_lower_bound (i); | |
489 | tree ub = tree_upper_bound (i); | |
490 | tree lb_other = other.tree_lower_bound (i); | |
491 | tree ub_other = other.tree_upper_bound (i); | |
492 | if (!operand_equal_p (lb, lb_other, 0) | |
493 | || !operand_equal_p (ub, ub_other, 0)) | |
494 | return false; | |
495 | } | |
496 | return true; | |
cca78449 AH |
497 | } |
498 | ||
cca78449 AH |
499 | /* Return TRUE if this is a symbolic range. */ |
500 | ||
501 | bool | |
4ba9fb0a | 502 | irange::symbolic_p () const |
cca78449 AH |
503 | { |
504 | return (!varying_p () | |
505 | && !undefined_p () | |
4ba9fb0a AH |
506 | && (!is_gimple_min_invariant (min ()) |
507 | || !is_gimple_min_invariant (max ()))); | |
cca78449 AH |
508 | } |
509 | ||
510 | /* NOTE: This is not the inverse of symbolic_p because the range | |
511 | could also be varying or undefined. Ideally they should be inverse | |
512 | of each other, with varying only applying to symbolics. Varying of | |
513 | constants would be represented as [-MIN, +MAX]. */ | |
514 | ||
515 | bool | |
4ba9fb0a | 516 | irange::constant_p () const |
cca78449 AH |
517 | { |
518 | return (!varying_p () | |
519 | && !undefined_p () | |
4ba9fb0a AH |
520 | && TREE_CODE (min ()) == INTEGER_CST |
521 | && TREE_CODE (max ()) == INTEGER_CST); | |
cca78449 AH |
522 | } |
523 | ||
4ba9fb0a AH |
524 | /* If range is a singleton, place it in RESULT and return TRUE. |
525 | Note: A singleton can be any gimple invariant, not just constants. | |
526 | So, [&x, &x] counts as a singleton. */ | |
527 | ||
cca78449 | 528 | bool |
4ba9fb0a | 529 | irange::singleton_p (tree *result) const |
cca78449 | 530 | { |
4ba9fb0a AH |
531 | if (!legacy_mode_p ()) |
532 | { | |
533 | if (num_pairs () == 1 && (wi::to_wide (tree_lower_bound ()) | |
534 | == wi::to_wide (tree_upper_bound ()))) | |
535 | { | |
536 | if (result) | |
537 | *result = tree_lower_bound (); | |
538 | return true; | |
539 | } | |
540 | return false; | |
541 | } | |
cca78449 AH |
542 | if (m_kind == VR_ANTI_RANGE) |
543 | { | |
544 | if (nonzero_p ()) | |
545 | { | |
546 | if (TYPE_PRECISION (type ()) == 1) | |
547 | { | |
548 | if (result) | |
4ba9fb0a | 549 | *result = max (); |
cca78449 AH |
550 | return true; |
551 | } | |
552 | return false; | |
553 | } | |
554 | if (num_pairs () == 1) | |
555 | { | |
556 | value_range vr0, vr1; | |
4ba9fb0a | 557 | ranges_from_anti_range ((const value_range *) this, &vr0, &vr1); |
cca78449 AH |
558 | return vr0.singleton_p (result); |
559 | } | |
560 | } | |
4ba9fb0a | 561 | // Catches non-numeric extremes as well. |
cca78449 AH |
562 | if (m_kind == VR_RANGE |
563 | && vrp_operand_equal_p (min (), max ()) | |
564 | && is_gimple_min_invariant (min ())) | |
565 | { | |
566 | if (result) | |
567 | *result = min (); | |
568 | return true; | |
569 | } | |
570 | return false; | |
571 | } | |
572 | ||
573 | /* Return 1 if VAL is inside value range. | |
4ba9fb0a | 574 | 0 if VAL is not inside value range. |
cca78449 AH |
575 | -2 if we cannot tell either way. |
576 | ||
577 | Benchmark compile/20001226-1.c compilation time after changing this | |
578 | function. */ | |
579 | ||
580 | int | |
4ba9fb0a | 581 | irange::value_inside_range (tree val) const |
cca78449 | 582 | { |
cca78449 AH |
583 | if (varying_p ()) |
584 | return 1; | |
585 | ||
586 | if (undefined_p ()) | |
587 | return 0; | |
588 | ||
4ba9fb0a AH |
589 | if (!legacy_mode_p () && TREE_CODE (val) == INTEGER_CST) |
590 | return contains_p (val); | |
591 | ||
592 | int cmp1 = operand_less_p (val, min ()); | |
cca78449 AH |
593 | if (cmp1 == -2) |
594 | return -2; | |
595 | if (cmp1 == 1) | |
596 | return m_kind != VR_RANGE; | |
597 | ||
4ba9fb0a | 598 | int cmp2 = operand_less_p (max (), val); |
cca78449 AH |
599 | if (cmp2 == -2) |
600 | return -2; | |
601 | ||
602 | if (m_kind == VR_RANGE) | |
603 | return !cmp2; | |
604 | else | |
605 | return !!cmp2; | |
606 | } | |
607 | ||
608 | /* Return TRUE if it is possible that range contains VAL. */ | |
609 | ||
610 | bool | |
4ba9fb0a | 611 | irange::may_contain_p (tree val) const |
cca78449 AH |
612 | { |
613 | return value_inside_range (val) != 0; | |
614 | } | |
615 | ||
616 | /* Return TRUE if range contains INTEGER_CST. */ | |
4ba9fb0a AH |
617 | /* Return 1 if VAL is inside value range. |
618 | 0 if VAL is not inside value range. | |
619 | ||
620 | Benchmark compile/20001226-1.c compilation time after changing this | |
621 | function. */ | |
622 | ||
cca78449 AH |
623 | |
624 | bool | |
4ba9fb0a | 625 | irange::contains_p (tree cst) const |
cca78449 | 626 | { |
4ba9fb0a AH |
627 | if (undefined_p ()) |
628 | return false; | |
629 | ||
630 | if (legacy_mode_p ()) | |
631 | { | |
632 | gcc_checking_assert (TREE_CODE (cst) == INTEGER_CST); | |
633 | if (symbolic_p ()) | |
634 | { | |
635 | value_range numeric_range (*this); | |
636 | numeric_range.normalize_symbolics (); | |
637 | return numeric_range.contains_p (cst); | |
638 | } | |
639 | return value_inside_range (cst) == 1; | |
640 | } | |
641 | ||
cca78449 | 642 | gcc_checking_assert (TREE_CODE (cst) == INTEGER_CST); |
4ba9fb0a AH |
643 | signop sign = TYPE_SIGN (TREE_TYPE (cst)); |
644 | wide_int v = wi::to_wide (cst); | |
645 | for (unsigned r = 0; r < m_num_ranges; ++r) | |
6ee86466 | 646 | { |
4ba9fb0a AH |
647 | if (wi::lt_p (v, lower_bound (r), sign)) |
648 | return false; | |
649 | if (wi::le_p (v, upper_bound (r), sign)) | |
650 | return true; | |
6ee86466 | 651 | } |
4ba9fb0a AH |
652 | |
653 | return false; | |
cca78449 AH |
654 | } |
655 | ||
4ba9fb0a | 656 | |
cca78449 AH |
657 | /* Normalize addresses into constants. */ |
658 | ||
6ee86466 | 659 | void |
4ba9fb0a | 660 | irange::normalize_addresses () |
cca78449 AH |
661 | { |
662 | if (undefined_p ()) | |
6ee86466 | 663 | return; |
cca78449 AH |
664 | |
665 | if (!POINTER_TYPE_P (type ()) || range_has_numeric_bounds_p (this)) | |
6ee86466 | 666 | return; |
cca78449 AH |
667 | |
668 | if (!range_includes_zero_p (this)) | |
669 | { | |
4ba9fb0a AH |
670 | gcc_checking_assert (TREE_CODE (min ()) == ADDR_EXPR |
671 | || TREE_CODE (max ()) == ADDR_EXPR); | |
6ee86466 AH |
672 | set_nonzero (type ()); |
673 | return; | |
cca78449 | 674 | } |
6ee86466 | 675 | set_varying (type ()); |
cca78449 AH |
676 | } |
677 | ||
678 | /* Normalize symbolics and addresses into constants. */ | |
679 | ||
6ee86466 | 680 | void |
4ba9fb0a | 681 | irange::normalize_symbolics () |
cca78449 AH |
682 | { |
683 | if (varying_p () || undefined_p ()) | |
6ee86466 AH |
684 | return; |
685 | ||
cca78449 AH |
686 | tree ttype = type (); |
687 | bool min_symbolic = !is_gimple_min_invariant (min ()); | |
688 | bool max_symbolic = !is_gimple_min_invariant (max ()); | |
689 | if (!min_symbolic && !max_symbolic) | |
6ee86466 AH |
690 | { |
691 | normalize_addresses (); | |
692 | return; | |
693 | } | |
cca78449 AH |
694 | |
695 | // [SYM, SYM] -> VARYING | |
696 | if (min_symbolic && max_symbolic) | |
697 | { | |
6ee86466 AH |
698 | set_varying (ttype); |
699 | return; | |
cca78449 AH |
700 | } |
701 | if (kind () == VR_RANGE) | |
702 | { | |
703 | // [SYM, NUM] -> [-MIN, NUM] | |
704 | if (min_symbolic) | |
6ee86466 AH |
705 | { |
706 | set (vrp_val_min (ttype), max ()); | |
707 | return; | |
708 | } | |
cca78449 | 709 | // [NUM, SYM] -> [NUM, +MAX] |
6ee86466 AH |
710 | set (min (), vrp_val_max (ttype)); |
711 | return; | |
cca78449 AH |
712 | } |
713 | gcc_checking_assert (kind () == VR_ANTI_RANGE); | |
714 | // ~[SYM, NUM] -> [NUM + 1, +MAX] | |
715 | if (min_symbolic) | |
716 | { | |
717 | if (!vrp_val_is_max (max ())) | |
718 | { | |
719 | tree n = wide_int_to_tree (ttype, wi::to_wide (max ()) + 1); | |
6ee86466 AH |
720 | set (n, vrp_val_max (ttype)); |
721 | return; | |
cca78449 | 722 | } |
6ee86466 AH |
723 | set_varying (ttype); |
724 | return; | |
cca78449 AH |
725 | } |
726 | // ~[NUM, SYM] -> [-MIN, NUM - 1] | |
727 | if (!vrp_val_is_min (min ())) | |
728 | { | |
729 | tree n = wide_int_to_tree (ttype, wi::to_wide (min ()) - 1); | |
6ee86466 AH |
730 | set (vrp_val_min (ttype), n); |
731 | return; | |
cca78449 | 732 | } |
6ee86466 | 733 | set_varying (ttype); |
cca78449 AH |
734 | } |
735 | ||
736 | /* Intersect the two value-ranges { *VR0TYPE, *VR0MIN, *VR0MAX } and | |
737 | { VR1TYPE, VR0MIN, VR0MAX } and store the result | |
738 | in { *VR0TYPE, *VR0MIN, *VR0MAX }. This may not be the smallest | |
739 | possible such range. The resulting range is not canonicalized. */ | |
740 | ||
741 | static void | |
742 | intersect_ranges (enum value_range_kind *vr0type, | |
743 | tree *vr0min, tree *vr0max, | |
744 | enum value_range_kind vr1type, | |
745 | tree vr1min, tree vr1max) | |
746 | { | |
747 | bool mineq = vrp_operand_equal_p (*vr0min, vr1min); | |
748 | bool maxeq = vrp_operand_equal_p (*vr0max, vr1max); | |
749 | ||
750 | /* [] is vr0, () is vr1 in the following classification comments. */ | |
751 | if (mineq && maxeq) | |
752 | { | |
753 | /* [( )] */ | |
754 | if (*vr0type == vr1type) | |
755 | /* Nothing to do for equal ranges. */ | |
756 | ; | |
757 | else if ((*vr0type == VR_RANGE | |
758 | && vr1type == VR_ANTI_RANGE) | |
759 | || (*vr0type == VR_ANTI_RANGE | |
760 | && vr1type == VR_RANGE)) | |
761 | { | |
762 | /* For anti-range with range intersection the result is empty. */ | |
763 | *vr0type = VR_UNDEFINED; | |
764 | *vr0min = NULL_TREE; | |
765 | *vr0max = NULL_TREE; | |
766 | } | |
767 | else | |
768 | gcc_unreachable (); | |
769 | } | |
770 | else if (operand_less_p (*vr0max, vr1min) == 1 | |
771 | || operand_less_p (vr1max, *vr0min) == 1) | |
772 | { | |
773 | /* [ ] ( ) or ( ) [ ] | |
774 | If the ranges have an empty intersection, the result of the | |
775 | intersect operation is the range for intersecting an | |
776 | anti-range with a range or empty when intersecting two ranges. */ | |
777 | if (*vr0type == VR_RANGE | |
778 | && vr1type == VR_ANTI_RANGE) | |
779 | ; | |
780 | else if (*vr0type == VR_ANTI_RANGE | |
781 | && vr1type == VR_RANGE) | |
782 | { | |
783 | *vr0type = vr1type; | |
784 | *vr0min = vr1min; | |
785 | *vr0max = vr1max; | |
786 | } | |
787 | else if (*vr0type == VR_RANGE | |
788 | && vr1type == VR_RANGE) | |
789 | { | |
790 | *vr0type = VR_UNDEFINED; | |
791 | *vr0min = NULL_TREE; | |
792 | *vr0max = NULL_TREE; | |
793 | } | |
794 | else if (*vr0type == VR_ANTI_RANGE | |
795 | && vr1type == VR_ANTI_RANGE) | |
796 | { | |
797 | /* If the anti-ranges are adjacent to each other merge them. */ | |
798 | if (TREE_CODE (*vr0max) == INTEGER_CST | |
799 | && TREE_CODE (vr1min) == INTEGER_CST | |
800 | && operand_less_p (*vr0max, vr1min) == 1 | |
801 | && integer_onep (int_const_binop (MINUS_EXPR, | |
802 | vr1min, *vr0max))) | |
803 | *vr0max = vr1max; | |
804 | else if (TREE_CODE (vr1max) == INTEGER_CST | |
805 | && TREE_CODE (*vr0min) == INTEGER_CST | |
806 | && operand_less_p (vr1max, *vr0min) == 1 | |
807 | && integer_onep (int_const_binop (MINUS_EXPR, | |
808 | *vr0min, vr1max))) | |
809 | *vr0min = vr1min; | |
810 | /* Else arbitrarily take VR0. */ | |
811 | } | |
812 | } | |
813 | else if ((maxeq || operand_less_p (vr1max, *vr0max) == 1) | |
814 | && (mineq || operand_less_p (*vr0min, vr1min) == 1)) | |
815 | { | |
816 | /* [ ( ) ] or [( ) ] or [ ( )] */ | |
817 | if (*vr0type == VR_RANGE | |
818 | && vr1type == VR_RANGE) | |
819 | { | |
820 | /* If both are ranges the result is the inner one. */ | |
821 | *vr0type = vr1type; | |
822 | *vr0min = vr1min; | |
823 | *vr0max = vr1max; | |
824 | } | |
825 | else if (*vr0type == VR_RANGE | |
826 | && vr1type == VR_ANTI_RANGE) | |
827 | { | |
828 | /* Choose the right gap if the left one is empty. */ | |
829 | if (mineq) | |
830 | { | |
831 | if (TREE_CODE (vr1max) != INTEGER_CST) | |
832 | *vr0min = vr1max; | |
833 | else if (TYPE_PRECISION (TREE_TYPE (vr1max)) == 1 | |
834 | && !TYPE_UNSIGNED (TREE_TYPE (vr1max))) | |
835 | *vr0min | |
836 | = int_const_binop (MINUS_EXPR, vr1max, | |
837 | build_int_cst (TREE_TYPE (vr1max), -1)); | |
838 | else | |
839 | *vr0min | |
840 | = int_const_binop (PLUS_EXPR, vr1max, | |
841 | build_int_cst (TREE_TYPE (vr1max), 1)); | |
842 | } | |
843 | /* Choose the left gap if the right one is empty. */ | |
844 | else if (maxeq) | |
845 | { | |
846 | if (TREE_CODE (vr1min) != INTEGER_CST) | |
847 | *vr0max = vr1min; | |
848 | else if (TYPE_PRECISION (TREE_TYPE (vr1min)) == 1 | |
849 | && !TYPE_UNSIGNED (TREE_TYPE (vr1min))) | |
850 | *vr0max | |
851 | = int_const_binop (PLUS_EXPR, vr1min, | |
852 | build_int_cst (TREE_TYPE (vr1min), -1)); | |
853 | else | |
854 | *vr0max | |
855 | = int_const_binop (MINUS_EXPR, vr1min, | |
856 | build_int_cst (TREE_TYPE (vr1min), 1)); | |
857 | } | |
858 | /* Choose the anti-range if the range is effectively varying. */ | |
859 | else if (vrp_val_is_min (*vr0min) | |
860 | && vrp_val_is_max (*vr0max)) | |
861 | { | |
862 | *vr0type = vr1type; | |
863 | *vr0min = vr1min; | |
864 | *vr0max = vr1max; | |
865 | } | |
866 | /* Else choose the range. */ | |
867 | } | |
868 | else if (*vr0type == VR_ANTI_RANGE | |
869 | && vr1type == VR_ANTI_RANGE) | |
870 | /* If both are anti-ranges the result is the outer one. */ | |
871 | ; | |
872 | else if (*vr0type == VR_ANTI_RANGE | |
873 | && vr1type == VR_RANGE) | |
874 | { | |
875 | /* The intersection is empty. */ | |
876 | *vr0type = VR_UNDEFINED; | |
877 | *vr0min = NULL_TREE; | |
878 | *vr0max = NULL_TREE; | |
879 | } | |
880 | else | |
881 | gcc_unreachable (); | |
882 | } | |
883 | else if ((maxeq || operand_less_p (*vr0max, vr1max) == 1) | |
884 | && (mineq || operand_less_p (vr1min, *vr0min) == 1)) | |
885 | { | |
886 | /* ( [ ] ) or ([ ] ) or ( [ ]) */ | |
887 | if (*vr0type == VR_RANGE | |
888 | && vr1type == VR_RANGE) | |
889 | /* Choose the inner range. */ | |
890 | ; | |
891 | else if (*vr0type == VR_ANTI_RANGE | |
892 | && vr1type == VR_RANGE) | |
893 | { | |
894 | /* Choose the right gap if the left is empty. */ | |
895 | if (mineq) | |
896 | { | |
897 | *vr0type = VR_RANGE; | |
898 | if (TREE_CODE (*vr0max) != INTEGER_CST) | |
899 | *vr0min = *vr0max; | |
900 | else if (TYPE_PRECISION (TREE_TYPE (*vr0max)) == 1 | |
901 | && !TYPE_UNSIGNED (TREE_TYPE (*vr0max))) | |
902 | *vr0min | |
903 | = int_const_binop (MINUS_EXPR, *vr0max, | |
904 | build_int_cst (TREE_TYPE (*vr0max), -1)); | |
905 | else | |
906 | *vr0min | |
907 | = int_const_binop (PLUS_EXPR, *vr0max, | |
908 | build_int_cst (TREE_TYPE (*vr0max), 1)); | |
909 | *vr0max = vr1max; | |
910 | } | |
911 | /* Choose the left gap if the right is empty. */ | |
912 | else if (maxeq) | |
913 | { | |
914 | *vr0type = VR_RANGE; | |
915 | if (TREE_CODE (*vr0min) != INTEGER_CST) | |
916 | *vr0max = *vr0min; | |
917 | else if (TYPE_PRECISION (TREE_TYPE (*vr0min)) == 1 | |
918 | && !TYPE_UNSIGNED (TREE_TYPE (*vr0min))) | |
919 | *vr0max | |
920 | = int_const_binop (PLUS_EXPR, *vr0min, | |
921 | build_int_cst (TREE_TYPE (*vr0min), -1)); | |
922 | else | |
923 | *vr0max | |
924 | = int_const_binop (MINUS_EXPR, *vr0min, | |
925 | build_int_cst (TREE_TYPE (*vr0min), 1)); | |
926 | *vr0min = vr1min; | |
927 | } | |
928 | /* Choose the anti-range if the range is effectively varying. */ | |
929 | else if (vrp_val_is_min (vr1min) | |
930 | && vrp_val_is_max (vr1max)) | |
931 | ; | |
932 | /* Choose the anti-range if it is ~[0,0], that range is special | |
933 | enough to special case when vr1's range is relatively wide. | |
934 | At least for types bigger than int - this covers pointers | |
935 | and arguments to functions like ctz. */ | |
936 | else if (*vr0min == *vr0max | |
937 | && integer_zerop (*vr0min) | |
938 | && ((TYPE_PRECISION (TREE_TYPE (*vr0min)) | |
939 | >= TYPE_PRECISION (integer_type_node)) | |
940 | || POINTER_TYPE_P (TREE_TYPE (*vr0min))) | |
941 | && TREE_CODE (vr1max) == INTEGER_CST | |
942 | && TREE_CODE (vr1min) == INTEGER_CST | |
943 | && (wi::clz (wi::to_wide (vr1max) - wi::to_wide (vr1min)) | |
944 | < TYPE_PRECISION (TREE_TYPE (*vr0min)) / 2)) | |
945 | ; | |
946 | /* Else choose the range. */ | |
947 | else | |
948 | { | |
949 | *vr0type = vr1type; | |
950 | *vr0min = vr1min; | |
951 | *vr0max = vr1max; | |
952 | } | |
953 | } | |
954 | else if (*vr0type == VR_ANTI_RANGE | |
955 | && vr1type == VR_ANTI_RANGE) | |
956 | { | |
957 | /* If both are anti-ranges the result is the outer one. */ | |
958 | *vr0type = vr1type; | |
959 | *vr0min = vr1min; | |
960 | *vr0max = vr1max; | |
961 | } | |
962 | else if (vr1type == VR_ANTI_RANGE | |
963 | && *vr0type == VR_RANGE) | |
964 | { | |
965 | /* The intersection is empty. */ | |
966 | *vr0type = VR_UNDEFINED; | |
967 | *vr0min = NULL_TREE; | |
968 | *vr0max = NULL_TREE; | |
969 | } | |
970 | else | |
971 | gcc_unreachable (); | |
972 | } | |
973 | else if ((operand_less_p (vr1min, *vr0max) == 1 | |
974 | || operand_equal_p (vr1min, *vr0max, 0)) | |
975 | && operand_less_p (*vr0min, vr1min) == 1) | |
976 | { | |
977 | /* [ ( ] ) or [ ]( ) */ | |
978 | if (*vr0type == VR_ANTI_RANGE | |
979 | && vr1type == VR_ANTI_RANGE) | |
980 | *vr0max = vr1max; | |
981 | else if (*vr0type == VR_RANGE | |
982 | && vr1type == VR_RANGE) | |
983 | *vr0min = vr1min; | |
984 | else if (*vr0type == VR_RANGE | |
985 | && vr1type == VR_ANTI_RANGE) | |
986 | { | |
987 | if (TREE_CODE (vr1min) == INTEGER_CST) | |
988 | *vr0max = int_const_binop (MINUS_EXPR, vr1min, | |
989 | build_int_cst (TREE_TYPE (vr1min), 1)); | |
990 | else | |
991 | *vr0max = vr1min; | |
992 | } | |
993 | else if (*vr0type == VR_ANTI_RANGE | |
994 | && vr1type == VR_RANGE) | |
995 | { | |
996 | *vr0type = VR_RANGE; | |
997 | if (TREE_CODE (*vr0max) == INTEGER_CST) | |
998 | *vr0min = int_const_binop (PLUS_EXPR, *vr0max, | |
999 | build_int_cst (TREE_TYPE (*vr0max), 1)); | |
1000 | else | |
1001 | *vr0min = *vr0max; | |
1002 | *vr0max = vr1max; | |
1003 | } | |
1004 | else | |
1005 | gcc_unreachable (); | |
1006 | } | |
1007 | else if ((operand_less_p (*vr0min, vr1max) == 1 | |
1008 | || operand_equal_p (*vr0min, vr1max, 0)) | |
1009 | && operand_less_p (vr1min, *vr0min) == 1) | |
1010 | { | |
1011 | /* ( [ ) ] or ( )[ ] */ | |
1012 | if (*vr0type == VR_ANTI_RANGE | |
1013 | && vr1type == VR_ANTI_RANGE) | |
1014 | *vr0min = vr1min; | |
1015 | else if (*vr0type == VR_RANGE | |
1016 | && vr1type == VR_RANGE) | |
1017 | *vr0max = vr1max; | |
1018 | else if (*vr0type == VR_RANGE | |
1019 | && vr1type == VR_ANTI_RANGE) | |
1020 | { | |
1021 | if (TREE_CODE (vr1max) == INTEGER_CST) | |
1022 | *vr0min = int_const_binop (PLUS_EXPR, vr1max, | |
1023 | build_int_cst (TREE_TYPE (vr1max), 1)); | |
1024 | else | |
1025 | *vr0min = vr1max; | |
1026 | } | |
1027 | else if (*vr0type == VR_ANTI_RANGE | |
1028 | && vr1type == VR_RANGE) | |
1029 | { | |
1030 | *vr0type = VR_RANGE; | |
1031 | if (TREE_CODE (*vr0min) == INTEGER_CST) | |
1032 | *vr0max = int_const_binop (MINUS_EXPR, *vr0min, | |
1033 | build_int_cst (TREE_TYPE (*vr0min), 1)); | |
1034 | else | |
1035 | *vr0max = *vr0min; | |
1036 | *vr0min = vr1min; | |
1037 | } | |
1038 | else | |
1039 | gcc_unreachable (); | |
1040 | } | |
1041 | ||
1042 | /* If we know the intersection is empty, there's no need to | |
1043 | conservatively add anything else to the set. */ | |
1044 | if (*vr0type == VR_UNDEFINED) | |
1045 | return; | |
1046 | ||
1047 | /* As a fallback simply use { *VRTYPE, *VR0MIN, *VR0MAX } as | |
1048 | result for the intersection. That's always a conservative | |
1049 | correct estimate unless VR1 is a constant singleton range | |
1050 | in which case we choose that. */ | |
1051 | if (vr1type == VR_RANGE | |
1052 | && is_gimple_min_invariant (vr1min) | |
1053 | && vrp_operand_equal_p (vr1min, vr1max)) | |
1054 | { | |
1055 | *vr0type = vr1type; | |
1056 | *vr0min = vr1min; | |
1057 | *vr0max = vr1max; | |
1058 | } | |
1059 | } | |
1060 | ||
1061 | /* Helper for the intersection operation for value ranges. Given two | |
4ba9fb0a AH |
1062 | ranges VR0 and VR1, set VR0 to the intersection of both ranges. |
1063 | This may not be the smallest possible such range. */ | |
cca78449 | 1064 | |
4ba9fb0a AH |
1065 | void |
1066 | irange::legacy_intersect (irange *vr0, const irange *vr1) | |
cca78449 | 1067 | { |
ea6da7f5 AH |
1068 | gcc_checking_assert (vr0->legacy_mode_p ()); |
1069 | gcc_checking_assert (vr1->legacy_mode_p ()); | |
cca78449 AH |
1070 | /* If either range is VR_VARYING the other one wins. */ |
1071 | if (vr1->varying_p ()) | |
4ba9fb0a | 1072 | return; |
cca78449 | 1073 | if (vr0->varying_p ()) |
4ba9fb0a | 1074 | { |
ea6da7f5 | 1075 | vr0->set (vr1->min (), vr1->max (), vr1->kind ()); |
4ba9fb0a AH |
1076 | return; |
1077 | } | |
cca78449 AH |
1078 | |
1079 | /* When either range is VR_UNDEFINED the resulting range is | |
1080 | VR_UNDEFINED, too. */ | |
1081 | if (vr0->undefined_p ()) | |
4ba9fb0a | 1082 | return; |
cca78449 | 1083 | if (vr1->undefined_p ()) |
4ba9fb0a AH |
1084 | { |
1085 | vr0->set_undefined (); | |
1086 | return; | |
1087 | } | |
cca78449 AH |
1088 | |
1089 | value_range_kind vr0kind = vr0->kind (); | |
1090 | tree vr0min = vr0->min (); | |
1091 | tree vr0max = vr0->max (); | |
ea6da7f5 AH |
1092 | |
1093 | intersect_ranges (&vr0kind, &vr0min, &vr0max, | |
1094 | vr1->kind (), vr1->min (), vr1->max ()); | |
4ba9fb0a | 1095 | |
cca78449 | 1096 | /* Make sure to canonicalize the result though as the inversion of a |
4ba9fb0a | 1097 | VR_RANGE can still be a VR_RANGE. */ |
cca78449 | 1098 | if (vr0kind == VR_UNDEFINED) |
4ba9fb0a | 1099 | vr0->set_undefined (); |
cca78449 | 1100 | else if (vr0kind == VR_VARYING) |
4ba9fb0a AH |
1101 | { |
1102 | /* If we failed, use the original VR0. */ | |
1103 | return; | |
1104 | } | |
cca78449 | 1105 | else |
4ba9fb0a | 1106 | vr0->set (vr0min, vr0max, vr0kind); |
cca78449 AH |
1107 | } |
1108 | ||
1109 | /* Union the two value-ranges { *VR0TYPE, *VR0MIN, *VR0MAX } and | |
1110 | { VR1TYPE, VR0MIN, VR0MAX } and store the result | |
1111 | in { *VR0TYPE, *VR0MIN, *VR0MAX }. This may not be the smallest | |
1112 | possible such range. The resulting range is not canonicalized. */ | |
1113 | ||
1114 | static void | |
1115 | union_ranges (enum value_range_kind *vr0type, | |
1116 | tree *vr0min, tree *vr0max, | |
1117 | enum value_range_kind vr1type, | |
1118 | tree vr1min, tree vr1max) | |
1119 | { | |
1120 | int cmpmin = compare_values (*vr0min, vr1min); | |
1121 | int cmpmax = compare_values (*vr0max, vr1max); | |
1122 | bool mineq = cmpmin == 0; | |
1123 | bool maxeq = cmpmax == 0; | |
1124 | ||
1125 | /* [] is vr0, () is vr1 in the following classification comments. */ | |
1126 | if (mineq && maxeq) | |
1127 | { | |
1128 | /* [( )] */ | |
1129 | if (*vr0type == vr1type) | |
1130 | /* Nothing to do for equal ranges. */ | |
1131 | ; | |
1132 | else if ((*vr0type == VR_RANGE | |
1133 | && vr1type == VR_ANTI_RANGE) | |
1134 | || (*vr0type == VR_ANTI_RANGE | |
1135 | && vr1type == VR_RANGE)) | |
1136 | { | |
1137 | /* For anti-range with range union the result is varying. */ | |
1138 | goto give_up; | |
1139 | } | |
1140 | else | |
1141 | gcc_unreachable (); | |
1142 | } | |
1143 | else if (operand_less_p (*vr0max, vr1min) == 1 | |
1144 | || operand_less_p (vr1max, *vr0min) == 1) | |
1145 | { | |
1146 | /* [ ] ( ) or ( ) [ ] | |
1147 | If the ranges have an empty intersection, result of the union | |
1148 | operation is the anti-range or if both are anti-ranges | |
1149 | it covers all. */ | |
1150 | if (*vr0type == VR_ANTI_RANGE | |
1151 | && vr1type == VR_ANTI_RANGE) | |
1152 | goto give_up; | |
1153 | else if (*vr0type == VR_ANTI_RANGE | |
1154 | && vr1type == VR_RANGE) | |
1155 | ; | |
1156 | else if (*vr0type == VR_RANGE | |
1157 | && vr1type == VR_ANTI_RANGE) | |
1158 | { | |
1159 | *vr0type = vr1type; | |
1160 | *vr0min = vr1min; | |
1161 | *vr0max = vr1max; | |
1162 | } | |
1163 | else if (*vr0type == VR_RANGE | |
1164 | && vr1type == VR_RANGE) | |
1165 | { | |
1166 | /* The result is the convex hull of both ranges. */ | |
1167 | if (operand_less_p (*vr0max, vr1min) == 1) | |
1168 | { | |
1169 | /* If the result can be an anti-range, create one. */ | |
1170 | if (TREE_CODE (*vr0max) == INTEGER_CST | |
1171 | && TREE_CODE (vr1min) == INTEGER_CST | |
1172 | && vrp_val_is_min (*vr0min) | |
1173 | && vrp_val_is_max (vr1max)) | |
1174 | { | |
1175 | tree min = int_const_binop (PLUS_EXPR, | |
1176 | *vr0max, | |
1177 | build_int_cst (TREE_TYPE (*vr0max), 1)); | |
1178 | tree max = int_const_binop (MINUS_EXPR, | |
1179 | vr1min, | |
1180 | build_int_cst (TREE_TYPE (vr1min), 1)); | |
1181 | if (!operand_less_p (max, min)) | |
1182 | { | |
1183 | *vr0type = VR_ANTI_RANGE; | |
1184 | *vr0min = min; | |
1185 | *vr0max = max; | |
1186 | } | |
1187 | else | |
1188 | *vr0max = vr1max; | |
1189 | } | |
1190 | else | |
1191 | *vr0max = vr1max; | |
1192 | } | |
1193 | else | |
1194 | { | |
1195 | /* If the result can be an anti-range, create one. */ | |
1196 | if (TREE_CODE (vr1max) == INTEGER_CST | |
1197 | && TREE_CODE (*vr0min) == INTEGER_CST | |
1198 | && vrp_val_is_min (vr1min) | |
1199 | && vrp_val_is_max (*vr0max)) | |
1200 | { | |
1201 | tree min = int_const_binop (PLUS_EXPR, | |
1202 | vr1max, | |
1203 | build_int_cst (TREE_TYPE (vr1max), 1)); | |
1204 | tree max = int_const_binop (MINUS_EXPR, | |
1205 | *vr0min, | |
1206 | build_int_cst (TREE_TYPE (*vr0min), 1)); | |
1207 | if (!operand_less_p (max, min)) | |
1208 | { | |
1209 | *vr0type = VR_ANTI_RANGE; | |
1210 | *vr0min = min; | |
1211 | *vr0max = max; | |
1212 | } | |
1213 | else | |
1214 | *vr0min = vr1min; | |
1215 | } | |
1216 | else | |
1217 | *vr0min = vr1min; | |
1218 | } | |
1219 | } | |
1220 | else | |
1221 | gcc_unreachable (); | |
1222 | } | |
1223 | else if ((maxeq || cmpmax == 1) | |
1224 | && (mineq || cmpmin == -1)) | |
1225 | { | |
1226 | /* [ ( ) ] or [( ) ] or [ ( )] */ | |
1227 | if (*vr0type == VR_RANGE | |
1228 | && vr1type == VR_RANGE) | |
1229 | ; | |
1230 | else if (*vr0type == VR_ANTI_RANGE | |
1231 | && vr1type == VR_ANTI_RANGE) | |
1232 | { | |
1233 | *vr0type = vr1type; | |
1234 | *vr0min = vr1min; | |
1235 | *vr0max = vr1max; | |
1236 | } | |
1237 | else if (*vr0type == VR_ANTI_RANGE | |
1238 | && vr1type == VR_RANGE) | |
1239 | { | |
1240 | /* Arbitrarily choose the right or left gap. */ | |
1241 | if (!mineq && TREE_CODE (vr1min) == INTEGER_CST) | |
1242 | *vr0max = int_const_binop (MINUS_EXPR, vr1min, | |
1243 | build_int_cst (TREE_TYPE (vr1min), 1)); | |
1244 | else if (!maxeq && TREE_CODE (vr1max) == INTEGER_CST) | |
1245 | *vr0min = int_const_binop (PLUS_EXPR, vr1max, | |
1246 | build_int_cst (TREE_TYPE (vr1max), 1)); | |
1247 | else | |
1248 | goto give_up; | |
1249 | } | |
1250 | else if (*vr0type == VR_RANGE | |
1251 | && vr1type == VR_ANTI_RANGE) | |
1252 | /* The result covers everything. */ | |
1253 | goto give_up; | |
1254 | else | |
1255 | gcc_unreachable (); | |
1256 | } | |
1257 | else if ((maxeq || cmpmax == -1) | |
1258 | && (mineq || cmpmin == 1)) | |
1259 | { | |
1260 | /* ( [ ] ) or ([ ] ) or ( [ ]) */ | |
1261 | if (*vr0type == VR_RANGE | |
1262 | && vr1type == VR_RANGE) | |
1263 | { | |
1264 | *vr0type = vr1type; | |
1265 | *vr0min = vr1min; | |
1266 | *vr0max = vr1max; | |
1267 | } | |
1268 | else if (*vr0type == VR_ANTI_RANGE | |
1269 | && vr1type == VR_ANTI_RANGE) | |
1270 | ; | |
1271 | else if (*vr0type == VR_RANGE | |
1272 | && vr1type == VR_ANTI_RANGE) | |
1273 | { | |
1274 | *vr0type = VR_ANTI_RANGE; | |
1275 | if (!mineq && TREE_CODE (*vr0min) == INTEGER_CST) | |
1276 | { | |
1277 | *vr0max = int_const_binop (MINUS_EXPR, *vr0min, | |
1278 | build_int_cst (TREE_TYPE (*vr0min), 1)); | |
1279 | *vr0min = vr1min; | |
1280 | } | |
1281 | else if (!maxeq && TREE_CODE (*vr0max) == INTEGER_CST) | |
1282 | { | |
1283 | *vr0min = int_const_binop (PLUS_EXPR, *vr0max, | |
1284 | build_int_cst (TREE_TYPE (*vr0max), 1)); | |
1285 | *vr0max = vr1max; | |
1286 | } | |
1287 | else | |
1288 | goto give_up; | |
1289 | } | |
1290 | else if (*vr0type == VR_ANTI_RANGE | |
1291 | && vr1type == VR_RANGE) | |
1292 | /* The result covers everything. */ | |
1293 | goto give_up; | |
1294 | else | |
1295 | gcc_unreachable (); | |
1296 | } | |
1297 | else if (cmpmin == -1 | |
1298 | && cmpmax == -1 | |
1299 | && (operand_less_p (vr1min, *vr0max) == 1 | |
1300 | || operand_equal_p (vr1min, *vr0max, 0))) | |
1301 | { | |
1302 | /* [ ( ] ) or [ ]( ) */ | |
1303 | if (*vr0type == VR_RANGE | |
1304 | && vr1type == VR_RANGE) | |
1305 | *vr0max = vr1max; | |
1306 | else if (*vr0type == VR_ANTI_RANGE | |
1307 | && vr1type == VR_ANTI_RANGE) | |
1308 | *vr0min = vr1min; | |
1309 | else if (*vr0type == VR_ANTI_RANGE | |
1310 | && vr1type == VR_RANGE) | |
1311 | { | |
1312 | if (TREE_CODE (vr1min) == INTEGER_CST) | |
1313 | *vr0max = int_const_binop (MINUS_EXPR, vr1min, | |
1314 | build_int_cst (TREE_TYPE (vr1min), 1)); | |
1315 | else | |
1316 | goto give_up; | |
1317 | } | |
1318 | else if (*vr0type == VR_RANGE | |
1319 | && vr1type == VR_ANTI_RANGE) | |
1320 | { | |
1321 | if (TREE_CODE (*vr0max) == INTEGER_CST) | |
1322 | { | |
1323 | *vr0type = vr1type; | |
1324 | *vr0min = int_const_binop (PLUS_EXPR, *vr0max, | |
1325 | build_int_cst (TREE_TYPE (*vr0max), 1)); | |
1326 | *vr0max = vr1max; | |
1327 | } | |
1328 | else | |
1329 | goto give_up; | |
1330 | } | |
1331 | else | |
1332 | gcc_unreachable (); | |
1333 | } | |
1334 | else if (cmpmin == 1 | |
1335 | && cmpmax == 1 | |
1336 | && (operand_less_p (*vr0min, vr1max) == 1 | |
1337 | || operand_equal_p (*vr0min, vr1max, 0))) | |
1338 | { | |
1339 | /* ( [ ) ] or ( )[ ] */ | |
1340 | if (*vr0type == VR_RANGE | |
1341 | && vr1type == VR_RANGE) | |
1342 | *vr0min = vr1min; | |
1343 | else if (*vr0type == VR_ANTI_RANGE | |
1344 | && vr1type == VR_ANTI_RANGE) | |
1345 | *vr0max = vr1max; | |
1346 | else if (*vr0type == VR_ANTI_RANGE | |
1347 | && vr1type == VR_RANGE) | |
1348 | { | |
1349 | if (TREE_CODE (vr1max) == INTEGER_CST) | |
1350 | *vr0min = int_const_binop (PLUS_EXPR, vr1max, | |
1351 | build_int_cst (TREE_TYPE (vr1max), 1)); | |
1352 | else | |
1353 | goto give_up; | |
1354 | } | |
1355 | else if (*vr0type == VR_RANGE | |
1356 | && vr1type == VR_ANTI_RANGE) | |
1357 | { | |
1358 | if (TREE_CODE (*vr0min) == INTEGER_CST) | |
1359 | { | |
1360 | *vr0type = vr1type; | |
1361 | *vr0max = int_const_binop (MINUS_EXPR, *vr0min, | |
1362 | build_int_cst (TREE_TYPE (*vr0min), 1)); | |
1363 | *vr0min = vr1min; | |
1364 | } | |
1365 | else | |
1366 | goto give_up; | |
1367 | } | |
1368 | else | |
1369 | gcc_unreachable (); | |
1370 | } | |
1371 | else | |
1372 | goto give_up; | |
1373 | ||
1374 | return; | |
1375 | ||
1376 | give_up: | |
1377 | *vr0type = VR_VARYING; | |
1378 | *vr0min = NULL_TREE; | |
1379 | *vr0max = NULL_TREE; | |
1380 | } | |
1381 | ||
4ba9fb0a AH |
1382 | /* Helper for meet operation for value ranges. Given two ranges VR0 |
1383 | and VR1, set VR0 to the union of both ranges. This may not be the | |
cca78449 AH |
1384 | smallest possible such range. */ |
1385 | ||
4ba9fb0a AH |
1386 | void |
1387 | irange::legacy_union (irange *vr0, const irange *vr1) | |
cca78449 | 1388 | { |
ea6da7f5 AH |
1389 | gcc_checking_assert (vr0->legacy_mode_p ()); |
1390 | gcc_checking_assert (vr1->legacy_mode_p ()); | |
1391 | ||
cca78449 AH |
1392 | /* VR0 has the resulting range if VR1 is undefined or VR0 is varying. */ |
1393 | if (vr1->undefined_p () | |
1394 | || vr0->varying_p ()) | |
4ba9fb0a | 1395 | return; |
cca78449 AH |
1396 | |
1397 | /* VR1 has the resulting range if VR0 is undefined or VR1 is varying. */ | |
4ba9fb0a AH |
1398 | if (vr0->undefined_p ()) |
1399 | { | |
ea6da7f5 | 1400 | vr0->set (vr1->min (), vr1->max (), vr1->kind ()); |
4ba9fb0a AH |
1401 | return; |
1402 | } | |
ea6da7f5 | 1403 | |
4ba9fb0a AH |
1404 | if (vr1->varying_p ()) |
1405 | { | |
1406 | vr0->set_varying (vr1->type ()); | |
1407 | return; | |
1408 | } | |
cca78449 AH |
1409 | |
1410 | value_range_kind vr0kind = vr0->kind (); | |
1411 | tree vr0min = vr0->min (); | |
1412 | tree vr0max = vr0->max (); | |
ea6da7f5 AH |
1413 | |
1414 | union_ranges (&vr0kind, &vr0min, &vr0max, | |
1415 | vr1->kind (), vr1->min (), vr1->max ()); | |
cca78449 | 1416 | |
cca78449 | 1417 | if (vr0kind == VR_UNDEFINED) |
4ba9fb0a | 1418 | vr0->set_undefined (); |
cca78449 | 1419 | else if (vr0kind == VR_VARYING) |
cca78449 | 1420 | { |
4ba9fb0a AH |
1421 | /* Failed to find an efficient meet. Before giving up and |
1422 | setting the result to VARYING, see if we can at least derive | |
1423 | a non-zero range. */ | |
1424 | if (range_includes_zero_p (vr0) == 0 | |
1425 | && range_includes_zero_p (vr1) == 0) | |
1426 | vr0->set_nonzero (vr0->type ()); | |
1427 | else | |
1428 | vr0->set_varying (vr0->type ()); | |
cca78449 | 1429 | } |
4ba9fb0a AH |
1430 | else |
1431 | vr0->set (vr0min, vr0max, vr0kind); | |
cca78449 AH |
1432 | } |
1433 | ||
1434 | /* Meet operation for value ranges. Given two value ranges VR0 and | |
1435 | VR1, store in VR0 a range that contains both VR0 and VR1. This | |
1436 | may not be the smallest possible such range. */ | |
1437 | ||
1438 | void | |
4ba9fb0a | 1439 | irange::union_ (const irange *other) |
cca78449 | 1440 | { |
4ba9fb0a | 1441 | if (legacy_mode_p ()) |
cca78449 | 1442 | { |
ea6da7f5 AH |
1443 | if (!other->legacy_mode_p ()) |
1444 | { | |
1445 | int_range<1> tmp = *other; | |
1446 | legacy_union (this, &tmp); | |
1447 | return; | |
1448 | } | |
4ba9fb0a AH |
1449 | if (dump_file && (dump_flags & TDF_DETAILS)) |
1450 | { | |
1451 | fprintf (dump_file, "Meeting\n "); | |
1452 | dump_value_range (dump_file, this); | |
1453 | fprintf (dump_file, "\nand\n "); | |
1454 | dump_value_range (dump_file, other); | |
1455 | fprintf (dump_file, "\n"); | |
1456 | } | |
cca78449 | 1457 | |
4ba9fb0a | 1458 | legacy_union (this, other); |
cca78449 | 1459 | |
4ba9fb0a AH |
1460 | if (dump_file && (dump_flags & TDF_DETAILS)) |
1461 | { | |
1462 | fprintf (dump_file, "to\n "); | |
1463 | dump_value_range (dump_file, this); | |
1464 | fprintf (dump_file, "\n"); | |
1465 | } | |
1466 | return; | |
1467 | } | |
1468 | ||
1469 | if (other->legacy_mode_p ()) | |
cca78449 | 1470 | { |
ea6da7f5 | 1471 | int_range<2> wider = *other; |
4ba9fb0a | 1472 | irange_union (wider); |
cca78449 | 1473 | } |
4ba9fb0a AH |
1474 | else |
1475 | irange_union (*other); | |
cca78449 AH |
1476 | } |
1477 | ||
cca78449 | 1478 | void |
4ba9fb0a | 1479 | irange::intersect (const irange *other) |
cca78449 | 1480 | { |
4ba9fb0a AH |
1481 | if (legacy_mode_p ()) |
1482 | { | |
ea6da7f5 AH |
1483 | if (!other->legacy_mode_p ()) |
1484 | { | |
1485 | int_range<1> tmp = *other; | |
1486 | legacy_intersect (this, &tmp); | |
1487 | return; | |
1488 | } | |
4ba9fb0a AH |
1489 | if (dump_file && (dump_flags & TDF_DETAILS)) |
1490 | { | |
1491 | fprintf (dump_file, "Intersecting\n "); | |
1492 | dump_value_range (dump_file, this); | |
1493 | fprintf (dump_file, "\nand\n "); | |
1494 | dump_value_range (dump_file, other); | |
1495 | fprintf (dump_file, "\n"); | |
1496 | } | |
1497 | ||
1498 | legacy_intersect (this, other); | |
1499 | ||
1500 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
1501 | { | |
1502 | fprintf (dump_file, "to\n "); | |
1503 | dump_value_range (dump_file, this); | |
1504 | fprintf (dump_file, "\n"); | |
1505 | } | |
1506 | return; | |
1507 | } | |
1508 | ||
1509 | if (other->legacy_mode_p ()) | |
1510 | { | |
1511 | int_range<2> wider; | |
1512 | wider = *other; | |
1513 | irange_intersect (wider); | |
1514 | } | |
1515 | else | |
1516 | irange_intersect (*other); | |
cca78449 AH |
1517 | } |
1518 | ||
4ba9fb0a AH |
1519 | // union_ for multi-ranges. |
1520 | ||
cca78449 | 1521 | void |
4ba9fb0a | 1522 | irange::irange_union (const irange &r) |
cca78449 | 1523 | { |
4ba9fb0a AH |
1524 | gcc_checking_assert (!legacy_mode_p () && !r.legacy_mode_p ()); |
1525 | ||
1526 | if (r.undefined_p () || varying_p ()) | |
1527 | return; | |
1528 | ||
1529 | if (undefined_p () || r.varying_p ()) | |
cca78449 | 1530 | { |
4ba9fb0a AH |
1531 | operator= (r); |
1532 | return; | |
cca78449 AH |
1533 | } |
1534 | ||
4ba9fb0a AH |
1535 | // Do not worry about merging and such by reserving twice as many |
1536 | // pairs as needed, and then simply sort the 2 ranges into this | |
1537 | // intermediate form. | |
1538 | // | |
1539 | // The intermediate result will have the property that the beginning | |
1540 | // of each range is <= the beginning of the next range. There may | |
1541 | // be overlapping ranges at this point. I.e. this would be valid | |
1542 | // [-20, 10], [-10, 0], [0, 20], [40, 90] as it satisfies this | |
1543 | // contraint : -20 < -10 < 0 < 40. When the range is rebuilt into r, | |
1544 | // the merge is performed. | |
1545 | // | |
1546 | // [Xi,Yi]..[Xn,Yn] U [Xj,Yj]..[Xm,Ym] --> [Xk,Yk]..[Xp,Yp] | |
1547 | tree ttype = r.type (); | |
1548 | signop sign = TYPE_SIGN (ttype); | |
1549 | ||
1550 | auto_vec<tree, 20> res; | |
1551 | wide_int u1 ; | |
1552 | wi::overflow_type ovf; | |
1553 | unsigned i = 0, j = 0, k = 0; | |
1554 | ||
1555 | while (i < m_num_ranges * 2 && j < r.m_num_ranges * 2) | |
1556 | { | |
1557 | // lower of Xi and Xj is the lowest point. | |
1558 | if (wi::le_p (wi::to_wide (m_base[i]), wi::to_wide (r.m_base[j]), sign)) | |
1559 | { | |
1560 | res.safe_push (m_base[i]); | |
1561 | res.safe_push (m_base[i + 1]); | |
1562 | k += 2; | |
1563 | i += 2; | |
1564 | } | |
1565 | else | |
1566 | { | |
1567 | res.safe_push (r.m_base[j]); | |
1568 | res.safe_push (r.m_base[j + 1]); | |
1569 | k += 2; | |
1570 | j += 2; | |
1571 | } | |
1572 | } | |
1573 | for ( ; i < m_num_ranges * 2; i += 2) | |
1574 | { | |
1575 | res.safe_push (m_base[i]); | |
1576 | res.safe_push (m_base[i + 1]); | |
1577 | k += 2; | |
1578 | } | |
1579 | for ( ; j < r.m_num_ranges * 2; j += 2) | |
1580 | { | |
1581 | res.safe_push (r.m_base[j]); | |
1582 | res.safe_push (r.m_base[j + 1]); | |
1583 | k += 2; | |
1584 | } | |
cca78449 | 1585 | |
4ba9fb0a AH |
1586 | // Now normalize the vector removing any overlaps. |
1587 | i = 2; | |
1588 | int prec = TYPE_PRECISION (ttype); | |
1589 | wide_int max_val = wi::max_value (prec, sign); | |
1590 | for (j = 2; j < k ; j += 2) | |
cca78449 | 1591 | { |
4ba9fb0a AH |
1592 | wide_int val_im1 = wi::to_wide (res[i - 1]); |
1593 | if (val_im1 == max_val) | |
1594 | break; | |
1595 | u1 = wi::add (val_im1, 1, sign, &ovf); | |
1596 | ||
1597 | // Overflow indicates we are at MAX already. | |
1598 | // A wide int bug requires the previous max_val check | |
1599 | // trigger: gcc.c-torture/compile/pr80443.c with -O3 | |
1600 | if (ovf == wi::OVF_OVERFLOW) | |
1601 | break; | |
1602 | ||
1603 | wide_int val_j = wi::to_wide (res[j]); | |
1604 | wide_int val_jp1 = wi::to_wide (res[j+1]); | |
1605 | // Current upper+1 is >= lower bound next pair, then we merge ranges. | |
1606 | if (wi::ge_p (u1, val_j, sign)) | |
1607 | { | |
1608 | // New upper bounds is greater of current or the next one. | |
1609 | if (wi::gt_p (val_jp1, val_im1, sign)) | |
1610 | res [i - 1] = res[j + 1]; | |
1611 | } | |
1612 | else | |
1613 | { | |
1614 | // This is a new distinct range, but no point in copying it | |
1615 | // if it is already in the right place. | |
1616 | if (i != j) | |
1617 | { | |
1618 | res[i++] = res[j]; | |
1619 | res[i++] = res[j + 1]; | |
1620 | } | |
1621 | else | |
1622 | i += 2; | |
1623 | } | |
cca78449 | 1624 | } |
4ba9fb0a AH |
1625 | |
1626 | // At this point, the vector should have i ranges, none overlapping. | |
1627 | // Now it simply needs to be copied, and if there are too many | |
1628 | // ranges, merge some. We wont do any analysis as to what the | |
1629 | // "best" merges are, simply combine the final ranges into one. | |
1630 | if (i > m_max_ranges * 2) | |
1631 | { | |
1632 | res[m_max_ranges * 2 - 1] = res[i - 1]; | |
1633 | i = m_max_ranges * 2; | |
1634 | } | |
1635 | ||
1636 | for (j = 0; j < i ; j++) | |
1637 | m_base[j] = res [j]; | |
1638 | m_num_ranges = i / 2; | |
1639 | ||
1640 | if (flag_checking) | |
1641 | verify_range (); | |
cca78449 AH |
1642 | } |
1643 | ||
4ba9fb0a | 1644 | // intersect for multi-ranges. |
cca78449 AH |
1645 | |
1646 | void | |
4ba9fb0a AH |
1647 | irange::irange_intersect (const irange &r) |
1648 | { | |
1649 | gcc_checking_assert (!legacy_mode_p () && !r.legacy_mode_p ()); | |
1650 | ||
1651 | if (undefined_p () || r.varying_p ()) | |
1652 | return; | |
1653 | if (r.undefined_p ()) | |
1654 | { | |
1655 | set_undefined (); | |
1656 | return; | |
1657 | } | |
1658 | if (varying_p ()) | |
1659 | { | |
1660 | operator= (r); | |
1661 | return; | |
1662 | } | |
1663 | ||
1664 | signop sign = TYPE_SIGN (TREE_TYPE(m_base[0])); | |
1665 | unsigned bld_pair = 0; | |
1666 | unsigned bld_lim = m_max_ranges; | |
c5a6c223 | 1667 | int_range_max r2 (*this); |
4ba9fb0a AH |
1668 | unsigned r2_lim = r2.num_pairs (); |
1669 | unsigned i2 = 0; | |
1670 | for (unsigned i = 0; i < r.num_pairs (); ) | |
1671 | { | |
1672 | // If r1's upper is < r2's lower, we can skip r1's pair. | |
1673 | tree ru = r.m_base[i * 2 + 1]; | |
1674 | tree r2l = r2.m_base[i2 * 2]; | |
1675 | if (wi::lt_p (wi::to_wide (ru), wi::to_wide (r2l), sign)) | |
1676 | { | |
1677 | i++; | |
1678 | continue; | |
1679 | } | |
1680 | // Likewise, skip r2's pair if its excluded. | |
1681 | tree r2u = r2.m_base[i2 * 2 + 1]; | |
1682 | tree rl = r.m_base[i * 2]; | |
1683 | if (wi::lt_p (wi::to_wide (r2u), wi::to_wide (rl), sign)) | |
1684 | { | |
1685 | i2++; | |
1686 | if (i2 < r2_lim) | |
1687 | continue; | |
1688 | // No more r2, break. | |
1689 | break; | |
1690 | } | |
1691 | ||
1692 | // Must be some overlap. Find the highest of the lower bounds, | |
1693 | // and set it, unless the build limits lower bounds is already | |
1694 | // set. | |
1695 | if (bld_pair < bld_lim) | |
1696 | { | |
1697 | if (wi::ge_p (wi::to_wide (rl), wi::to_wide (r2l), sign)) | |
1698 | m_base[bld_pair * 2] = rl; | |
1699 | else | |
1700 | m_base[bld_pair * 2] = r2l; | |
1701 | } | |
1702 | else | |
1703 | // Decrease and set a new upper. | |
1704 | bld_pair--; | |
1705 | ||
1706 | // ...and choose the lower of the upper bounds. | |
1707 | if (wi::le_p (wi::to_wide (ru), wi::to_wide (r2u), sign)) | |
1708 | { | |
1709 | m_base[bld_pair * 2 + 1] = ru; | |
1710 | bld_pair++; | |
1711 | // Move past the r1 pair and keep trying. | |
1712 | i++; | |
1713 | continue; | |
1714 | } | |
1715 | else | |
1716 | { | |
1717 | m_base[bld_pair * 2 + 1] = r2u; | |
1718 | bld_pair++; | |
1719 | i2++; | |
1720 | if (i2 < r2_lim) | |
1721 | continue; | |
1722 | // No more r2, break. | |
1723 | break; | |
1724 | } | |
1725 | // r2 has the higher lower bound. | |
1726 | } | |
1727 | ||
1728 | // At the exit of this loop, it is one of 2 things: | |
1729 | // ran out of r1, or r2, but either means we are done. | |
1730 | m_num_ranges = bld_pair; | |
1731 | if (flag_checking) | |
1732 | verify_range (); | |
1733 | } | |
1734 | ||
2118438f AH |
1735 | // Signed 1-bits are strange. You can't subtract 1, because you can't |
1736 | // represent the number 1. This works around that for the invert routine. | |
1737 | ||
4ba9fb0a AH |
1738 | static wide_int inline |
1739 | subtract_one (const wide_int &x, tree type, wi::overflow_type &overflow) | |
cca78449 | 1740 | { |
4ba9fb0a | 1741 | if (TYPE_SIGN (type) == SIGNED) |
2118438f | 1742 | return wi::add (x, -1, SIGNED, &overflow); |
4ba9fb0a AH |
1743 | else |
1744 | return wi::sub (x, 1, UNSIGNED, &overflow); | |
cca78449 AH |
1745 | } |
1746 | ||
2118438f AH |
1747 | // The analogous function for adding 1. |
1748 | ||
1749 | static wide_int inline | |
1750 | add_one (const wide_int &x, tree type, wi::overflow_type &overflow) | |
1751 | { | |
1752 | if (TYPE_SIGN (type) == SIGNED) | |
1753 | return wi::sub (x, -1, SIGNED, &overflow); | |
1754 | else | |
1755 | return wi::add (x, 1, UNSIGNED, &overflow); | |
1756 | } | |
1757 | ||
1758 | // Return the inverse of a range. | |
cca78449 AH |
1759 | |
1760 | void | |
4ba9fb0a | 1761 | irange::invert () |
cca78449 | 1762 | { |
4ba9fb0a AH |
1763 | if (legacy_mode_p ()) |
1764 | { | |
1765 | // We can't just invert VR_RANGE and VR_ANTI_RANGE because we may | |
1766 | // create non-canonical ranges. Use the constructors instead. | |
1767 | if (m_kind == VR_RANGE) | |
1768 | *this = value_range (min (), max (), VR_ANTI_RANGE); | |
1769 | else if (m_kind == VR_ANTI_RANGE) | |
1770 | *this = value_range (min (), max ()); | |
1771 | else | |
1772 | gcc_unreachable (); | |
1773 | return; | |
1774 | } | |
1775 | ||
1776 | gcc_assert (!undefined_p () && !varying_p ()); | |
1777 | ||
1778 | // We always need one more set of bounds to represent an inverse, so | |
1779 | // if we're at the limit, we can't properly represent things. | |
1780 | // | |
1781 | // For instance, to represent the inverse of a 2 sub-range set | |
1782 | // [5, 10][20, 30], we would need a 3 sub-range set | |
1783 | // [-MIN, 4][11, 19][31, MAX]. | |
1784 | // | |
1785 | // In this case, return the most conservative thing. | |
1786 | // | |
1787 | // However, if any of the extremes of the range are -MIN/+MAX, we | |
1788 | // know we will not need an extra bound. For example: | |
1789 | // | |
1790 | // INVERT([-MIN,20][30,40]) => [21,29][41,+MAX] | |
1791 | // INVERT([-MIN,20][30,MAX]) => [21,29] | |
1792 | tree ttype = type (); | |
1793 | unsigned prec = TYPE_PRECISION (ttype); | |
1794 | signop sign = TYPE_SIGN (ttype); | |
1795 | wide_int type_min = wi::min_value (prec, sign); | |
1796 | wide_int type_max = wi::max_value (prec, sign); | |
1797 | if (m_num_ranges == m_max_ranges | |
1798 | && lower_bound () != type_min | |
1799 | && upper_bound () != type_max) | |
1800 | { | |
1801 | m_base[1] = wide_int_to_tree (ttype, type_max); | |
1802 | m_num_ranges = 1; | |
1803 | return; | |
1804 | } | |
1805 | // The algorithm is as follows. To calculate INVERT ([a,b][c,d]), we | |
1806 | // generate [-MIN, a-1][b+1, c-1][d+1, MAX]. | |
1807 | // | |
1808 | // If there is an over/underflow in the calculation for any | |
1809 | // sub-range, we eliminate that subrange. This allows us to easily | |
1810 | // calculate INVERT([-MIN, 5]) with: [-MIN, -MIN-1][6, MAX]. And since | |
1811 | // we eliminate the underflow, only [6, MAX] remains. | |
1812 | unsigned i = 0; | |
1813 | wi::overflow_type ovf; | |
1814 | // Construct leftmost range. | |
c5a6c223 | 1815 | int_range_max orig_range (*this); |
4ba9fb0a AH |
1816 | unsigned nitems = 0; |
1817 | wide_int tmp; | |
1818 | // If this is going to underflow on the MINUS 1, don't even bother | |
1819 | // checking. This also handles subtracting one from an unsigned 0, | |
1820 | // which doesn't set the underflow bit. | |
1821 | if (type_min != orig_range.lower_bound ()) | |
1822 | { | |
1823 | m_base[nitems++] = wide_int_to_tree (ttype, type_min); | |
1824 | tmp = subtract_one (orig_range.lower_bound (), ttype, ovf); | |
1825 | m_base[nitems++] = wide_int_to_tree (ttype, tmp); | |
1826 | if (ovf) | |
1827 | nitems = 0; | |
1828 | } | |
1829 | i++; | |
1830 | // Construct middle ranges if applicable. | |
1831 | if (orig_range.num_pairs () > 1) | |
1832 | { | |
1833 | unsigned j = i; | |
1834 | for (; j < (orig_range.num_pairs () * 2) - 1; j += 2) | |
1835 | { | |
1836 | // The middle ranges cannot have MAX/MIN, so there's no need | |
1837 | // to check for unsigned overflow on the +1 and -1 here. | |
1838 | tmp = wi::add (wi::to_wide (orig_range.m_base[j]), 1, sign, &ovf); | |
1839 | m_base[nitems++] = wide_int_to_tree (ttype, tmp); | |
1840 | tmp = subtract_one (wi::to_wide (orig_range.m_base[j + 1]), | |
1841 | ttype, ovf); | |
1842 | m_base[nitems++] = wide_int_to_tree (ttype, tmp); | |
1843 | if (ovf) | |
1844 | nitems -= 2; | |
1845 | } | |
1846 | i = j; | |
1847 | } | |
1848 | // Construct rightmost range. | |
1849 | // | |
1850 | // However, if this will overflow on the PLUS 1, don't even bother. | |
1851 | // This also handles adding one to an unsigned MAX, which doesn't | |
1852 | // set the overflow bit. | |
1853 | if (type_max != wi::to_wide (orig_range.m_base[i])) | |
1854 | { | |
2118438f | 1855 | tmp = add_one (wi::to_wide (orig_range.m_base[i]), ttype, ovf); |
4ba9fb0a AH |
1856 | m_base[nitems++] = wide_int_to_tree (ttype, tmp); |
1857 | m_base[nitems++] = wide_int_to_tree (ttype, type_max); | |
1858 | if (ovf) | |
1859 | nitems -= 2; | |
1860 | } | |
1861 | m_num_ranges = nitems / 2; | |
1862 | ||
1863 | if (flag_checking) | |
1864 | verify_range (); | |
1865 | } | |
1866 | ||
1867 | static void | |
1868 | dump_bound_with_infinite_markers (FILE *file, tree bound) | |
1869 | { | |
1870 | tree type = TREE_TYPE (bound); | |
3d3470e2 AH |
1871 | wide_int type_min = wi::min_value (TYPE_PRECISION (type), TYPE_SIGN (type)); |
1872 | wide_int type_max = wi::max_value (TYPE_PRECISION (type), TYPE_SIGN (type)); | |
1873 | ||
4ba9fb0a AH |
1874 | if (INTEGRAL_TYPE_P (type) |
1875 | && !TYPE_UNSIGNED (type) | |
3d3470e2 AH |
1876 | && TREE_CODE (bound) == INTEGER_CST |
1877 | && wi::to_wide (bound) == type_min | |
4ba9fb0a AH |
1878 | && TYPE_PRECISION (type) != 1) |
1879 | fprintf (file, "-INF"); | |
3d3470e2 AH |
1880 | else if (TREE_CODE (bound) == INTEGER_CST |
1881 | && wi::to_wide (bound) == type_max | |
4ba9fb0a AH |
1882 | && TYPE_PRECISION (type) != 1) |
1883 | fprintf (file, "+INF"); | |
cca78449 | 1884 | else |
4ba9fb0a | 1885 | print_generic_expr (file, bound); |
cca78449 AH |
1886 | } |
1887 | ||
1888 | void | |
4ba9fb0a | 1889 | irange::dump (FILE *file) const |
cca78449 AH |
1890 | { |
1891 | if (undefined_p ()) | |
cca78449 | 1892 | { |
4ba9fb0a AH |
1893 | fprintf (file, "UNDEFINED"); |
1894 | return; | |
1895 | } | |
1896 | print_generic_expr (file, type ()); | |
1897 | fprintf (file, " "); | |
1898 | if (varying_p ()) | |
1899 | { | |
1900 | fprintf (file, "VARYING"); | |
1901 | return; | |
1902 | } | |
1903 | if (legacy_mode_p ()) | |
1904 | { | |
cca78449 | 1905 | fprintf (file, "%s[", (m_kind == VR_ANTI_RANGE) ? "~" : ""); |
4ba9fb0a | 1906 | dump_bound_with_infinite_markers (file, min ()); |
cca78449 | 1907 | fprintf (file, ", "); |
4ba9fb0a | 1908 | dump_bound_with_infinite_markers (file, max ()); |
cca78449 | 1909 | fprintf (file, "]"); |
4ba9fb0a | 1910 | return; |
cca78449 | 1911 | } |
4ba9fb0a | 1912 | for (unsigned i = 0; i < m_num_ranges; ++i) |
cca78449 | 1913 | { |
4ba9fb0a AH |
1914 | tree lb = m_base[i * 2]; |
1915 | tree ub = m_base[i * 2 + 1]; | |
1916 | fprintf (file, "["); | |
1917 | dump_bound_with_infinite_markers (file, lb); | |
1918 | fprintf (file, ", "); | |
1919 | dump_bound_with_infinite_markers (file, ub); | |
1920 | fprintf (file, "]"); | |
cca78449 | 1921 | } |
cca78449 AH |
1922 | } |
1923 | ||
1924 | void | |
4ba9fb0a | 1925 | dump_value_range (FILE *file, const irange *vr) |
cca78449 | 1926 | { |
4ba9fb0a | 1927 | vr->dump (file); |
cca78449 AH |
1928 | } |
1929 | ||
4ba9fb0a AH |
1930 | DEBUG_FUNCTION void |
1931 | debug (const irange *vr) | |
cca78449 | 1932 | { |
4ba9fb0a AH |
1933 | dump_value_range (stderr, vr); |
1934 | fprintf (stderr, "\n"); | |
1935 | } | |
1936 | ||
1937 | DEBUG_FUNCTION void | |
1938 | debug (const irange &vr) | |
1939 | { | |
1940 | debug (&vr); | |
cca78449 AH |
1941 | } |
1942 | ||
1943 | DEBUG_FUNCTION void | |
1944 | debug (const value_range *vr) | |
1945 | { | |
1946 | dump_value_range (stderr, vr); | |
4ba9fb0a | 1947 | fprintf (stderr, "\n"); |
cca78449 AH |
1948 | } |
1949 | ||
1950 | DEBUG_FUNCTION void | |
1951 | debug (const value_range &vr) | |
1952 | { | |
1953 | dump_value_range (stderr, &vr); | |
4ba9fb0a | 1954 | fprintf (stderr, "\n"); |
cca78449 AH |
1955 | } |
1956 | ||
1957 | /* Create two value-ranges in *VR0 and *VR1 from the anti-range *AR | |
1958 | so that *VR0 U *VR1 == *AR. Returns true if that is possible, | |
1959 | false otherwise. If *AR can be represented with a single range | |
1960 | *VR1 will be VR_UNDEFINED. */ | |
1961 | ||
1962 | bool | |
1963 | ranges_from_anti_range (const value_range *ar, | |
1964 | value_range *vr0, value_range *vr1) | |
1965 | { | |
1966 | tree type = ar->type (); | |
1967 | ||
1968 | vr0->set_undefined (); | |
1969 | vr1->set_undefined (); | |
1970 | ||
1971 | /* As a future improvement, we could handle ~[0, A] as: [-INF, -1] U | |
1972 | [A+1, +INF]. Not sure if this helps in practice, though. */ | |
1973 | ||
1974 | if (ar->kind () != VR_ANTI_RANGE | |
1975 | || TREE_CODE (ar->min ()) != INTEGER_CST | |
1976 | || TREE_CODE (ar->max ()) != INTEGER_CST | |
1977 | || !vrp_val_min (type) | |
1978 | || !vrp_val_max (type)) | |
1979 | return false; | |
1980 | ||
1981 | if (tree_int_cst_lt (vrp_val_min (type), ar->min ())) | |
1982 | vr0->set (vrp_val_min (type), | |
1983 | wide_int_to_tree (type, wi::to_wide (ar->min ()) - 1)); | |
1984 | if (tree_int_cst_lt (ar->max (), vrp_val_max (type))) | |
1985 | vr1->set (wide_int_to_tree (type, wi::to_wide (ar->max ()) + 1), | |
1986 | vrp_val_max (type)); | |
1987 | if (vr0->undefined_p ()) | |
1988 | { | |
1989 | *vr0 = *vr1; | |
1990 | vr1->set_undefined (); | |
1991 | } | |
1992 | ||
1993 | return !vr0->undefined_p (); | |
1994 | } | |
1995 | ||
1996 | bool | |
4ba9fb0a | 1997 | range_has_numeric_bounds_p (const irange *vr) |
cca78449 | 1998 | { |
4ba9fb0a | 1999 | return (!vr->undefined_p () |
cca78449 AH |
2000 | && TREE_CODE (vr->min ()) == INTEGER_CST |
2001 | && TREE_CODE (vr->max ()) == INTEGER_CST); | |
2002 | } | |
2003 | ||
cca78449 AH |
2004 | /* Return whether VAL is equal to the maximum value of its type. |
2005 | We can't do a simple equality comparison with TYPE_MAX_VALUE because | |
2006 | C typedefs and Ada subtypes can produce types whose TYPE_MAX_VALUE | |
2007 | is not == to the integer constant with the same value in the type. */ | |
2008 | ||
2009 | bool | |
2010 | vrp_val_is_max (const_tree val) | |
2011 | { | |
2012 | tree type_max = vrp_val_max (TREE_TYPE (val)); | |
2013 | return (val == type_max | |
2014 | || (type_max != NULL_TREE | |
2015 | && operand_equal_p (val, type_max, 0))); | |
2016 | } | |
2017 | ||
2018 | /* Return whether VAL is equal to the minimum value of its type. */ | |
2019 | ||
2020 | bool | |
2021 | vrp_val_is_min (const_tree val) | |
2022 | { | |
2023 | tree type_min = vrp_val_min (TREE_TYPE (val)); | |
2024 | return (val == type_min | |
2025 | || (type_min != NULL_TREE | |
2026 | && operand_equal_p (val, type_min, 0))); | |
2027 | } | |
2028 | ||
2029 | /* Return true, if VAL1 and VAL2 are equal values for VRP purposes. */ | |
2030 | ||
2031 | bool | |
2032 | vrp_operand_equal_p (const_tree val1, const_tree val2) | |
2033 | { | |
2034 | if (val1 == val2) | |
2035 | return true; | |
2036 | if (!val1 || !val2 || !operand_equal_p (val1, val2, 0)) | |
2037 | return false; | |
2038 | return true; | |
2039 | } | |
4ba9fb0a AH |
2040 | |
2041 | #define DEFINE_INT_RANGE_GC_STUBS(N) \ | |
2042 | void \ | |
2043 | gt_pch_nx (int_range<N> *&x) \ | |
2044 | { \ | |
2045 | for (unsigned i = 0; i < N; ++i) \ | |
2046 | { \ | |
2047 | gt_pch_nx (x->m_ranges[i * 2]); \ | |
2048 | gt_pch_nx (x->m_ranges[i * 2 + 1]); \ | |
2049 | } \ | |
2050 | } \ | |
2051 | \ | |
2052 | void \ | |
2053 | gt_ggc_mx (int_range<N> *&x) \ | |
2054 | { \ | |
2055 | for (unsigned i = 0; i < N; ++i) \ | |
2056 | { \ | |
2057 | gt_ggc_mx (x->m_ranges[i * 2]); \ | |
2058 | gt_ggc_mx (x->m_ranges[i * 2 + 1]); \ | |
2059 | } \ | |
2060 | } | |
2061 | ||
2062 | #define DEFINE_INT_RANGE_INSTANCE(N) \ | |
2063 | template int_range<N>::int_range(tree, tree, value_range_kind); \ | |
2064 | template int_range<N>::int_range(tree_node *, \ | |
2065 | const wide_int &, \ | |
2066 | const wide_int &, \ | |
2067 | value_range_kind); \ | |
2068 | template int_range<N>::int_range(tree); \ | |
2069 | template int_range<N>::int_range(const irange &); \ | |
2070 | template int_range<N>::int_range(const int_range &); \ | |
2071 | template int_range<N>& int_range<N>::operator= (const int_range &); | |
2072 | ||
2073 | DEFINE_INT_RANGE_INSTANCE(1) | |
2074 | DEFINE_INT_RANGE_INSTANCE(2) | |
2075 | DEFINE_INT_RANGE_INSTANCE(3) | |
2076 | DEFINE_INT_RANGE_INSTANCE(255) | |
2077 | DEFINE_INT_RANGE_GC_STUBS(1) | |
b5cff0db AH |
2078 | |
2079 | #if CHECKING_P | |
2080 | #include "selftest.h" | |
2081 | ||
2082 | namespace selftest | |
2083 | { | |
2084 | #define INT(N) build_int_cst (integer_type_node, (N)) | |
2085 | #define UINT(N) build_int_cstu (unsigned_type_node, (N)) | |
2086 | #define UINT128(N) build_int_cstu (u128_type, (N)) | |
2087 | #define UCHAR(N) build_int_cstu (unsigned_char_type_node, (N)) | |
2088 | #define SCHAR(N) build_int_cst (signed_char_type_node, (N)) | |
2089 | ||
2090 | static int_range<3> | |
2091 | build_range3 (int a, int b, int c, int d, int e, int f) | |
2092 | { | |
2093 | int_range<3> i1 (INT (a), INT (b)); | |
2094 | int_range<3> i2 (INT (c), INT (d)); | |
2095 | int_range<3> i3 (INT (e), INT (f)); | |
2096 | i1.union_ (i2); | |
2097 | i1.union_ (i3); | |
2098 | return i1; | |
2099 | } | |
2100 | ||
2101 | static void | |
2102 | range_tests_irange3 () | |
2103 | { | |
2104 | typedef int_range<3> int_range3; | |
2105 | int_range3 r0, r1, r2; | |
2106 | int_range3 i1, i2, i3; | |
2107 | ||
2108 | // ([10,20] U [5,8]) U [1,3] ==> [1,3][5,8][10,20]. | |
2109 | r0 = int_range3 (INT (10), INT (20)); | |
2110 | r1 = int_range3 (INT (5), INT (8)); | |
2111 | r0.union_ (r1); | |
2112 | r1 = int_range3 (INT (1), INT (3)); | |
2113 | r0.union_ (r1); | |
2114 | ASSERT_TRUE (r0 == build_range3 (1, 3, 5, 8, 10, 20)); | |
2115 | ||
2116 | // [1,3][5,8][10,20] U [-5,0] => [-5,3][5,8][10,20]. | |
2117 | r1 = int_range3 (INT (-5), INT (0)); | |
2118 | r0.union_ (r1); | |
2119 | ASSERT_TRUE (r0 == build_range3 (-5, 3, 5, 8, 10, 20)); | |
2120 | ||
2121 | // [10,20][30,40] U [50,60] ==> [10,20][30,40][50,60]. | |
2122 | r1 = int_range3 (INT (50), INT (60)); | |
2123 | r0 = int_range3 (INT (10), INT (20)); | |
2124 | r0.union_ (int_range3 (INT (30), INT (40))); | |
2125 | r0.union_ (r1); | |
2126 | ASSERT_TRUE (r0 == build_range3 (10, 20, 30, 40, 50, 60)); | |
2127 | // [10,20][30,40][50,60] U [70, 80] ==> [10,20][30,40][50,60][70,80]. | |
2128 | r1 = int_range3 (INT (70), INT (80)); | |
2129 | r0.union_ (r1); | |
2130 | ||
2131 | r2 = build_range3 (10, 20, 30, 40, 50, 60); | |
2132 | r2.union_ (int_range3 (INT (70), INT (80))); | |
2133 | ASSERT_TRUE (r0 == r2); | |
2134 | ||
2135 | // [10,20][30,40][50,60] U [6,35] => [6,40][50,60]. | |
2136 | r0 = build_range3 (10, 20, 30, 40, 50, 60); | |
2137 | r1 = int_range3 (INT (6), INT (35)); | |
2138 | r0.union_ (r1); | |
2139 | r1 = int_range3 (INT (6), INT (40)); | |
2140 | r1.union_ (int_range3 (INT (50), INT (60))); | |
2141 | ASSERT_TRUE (r0 == r1); | |
2142 | ||
2143 | // [10,20][30,40][50,60] U [6,60] => [6,60]. | |
2144 | r0 = build_range3 (10, 20, 30, 40, 50, 60); | |
2145 | r1 = int_range3 (INT (6), INT (60)); | |
2146 | r0.union_ (r1); | |
2147 | ASSERT_TRUE (r0 == int_range3 (INT (6), INT (60))); | |
2148 | ||
2149 | // [10,20][30,40][50,60] U [6,70] => [6,70]. | |
2150 | r0 = build_range3 (10, 20, 30, 40, 50, 60); | |
2151 | r1 = int_range3 (INT (6), INT (70)); | |
2152 | r0.union_ (r1); | |
2153 | ASSERT_TRUE (r0 == int_range3 (INT (6), INT (70))); | |
2154 | ||
2155 | // [10,20][30,40][50,60] U [35,70] => [10,20][30,70]. | |
2156 | r0 = build_range3 (10, 20, 30, 40, 50, 60); | |
2157 | r1 = int_range3 (INT (35), INT (70)); | |
2158 | r0.union_ (r1); | |
2159 | r1 = int_range3 (INT (10), INT (20)); | |
2160 | r1.union_ (int_range3 (INT (30), INT (70))); | |
2161 | ASSERT_TRUE (r0 == r1); | |
2162 | ||
2163 | // [10,20][30,40][50,60] U [15,35] => [10,40][50,60]. | |
2164 | r0 = build_range3 (10, 20, 30, 40, 50, 60); | |
2165 | r1 = int_range3 (INT (15), INT (35)); | |
2166 | r0.union_ (r1); | |
2167 | r1 = int_range3 (INT (10), INT (40)); | |
2168 | r1.union_ (int_range3 (INT (50), INT (60))); | |
2169 | ASSERT_TRUE (r0 == r1); | |
2170 | ||
2171 | // [10,20][30,40][50,60] U [35,35] => [10,20][30,40][50,60]. | |
2172 | r0 = build_range3 (10, 20, 30, 40, 50, 60); | |
2173 | r1 = int_range3 (INT (35), INT (35)); | |
2174 | r0.union_ (r1); | |
2175 | ASSERT_TRUE (r0 == build_range3 (10, 20, 30, 40, 50, 60)); | |
2176 | } | |
2177 | ||
2178 | static void | |
2179 | range_tests_int_range_max () | |
2180 | { | |
2181 | int_range_max big; | |
2182 | unsigned int nrange; | |
2183 | ||
2184 | // Build a huge multi-range range. | |
2185 | for (nrange = 0; nrange < 50; ++nrange) | |
2186 | { | |
2187 | int_range<1> tmp (INT (nrange*10), INT (nrange*10 + 5)); | |
2188 | big.union_ (tmp); | |
2189 | } | |
2190 | ASSERT_TRUE (big.num_pairs () == nrange); | |
2191 | ||
2192 | // Verify that we can copy it without loosing precision. | |
2193 | int_range_max copy (big); | |
2194 | ASSERT_TRUE (copy.num_pairs () == nrange); | |
2195 | ||
2196 | // Inverting it should produce one more sub-range. | |
2197 | big.invert (); | |
2198 | ASSERT_TRUE (big.num_pairs () == nrange + 1); | |
2199 | ||
2200 | int_range<1> tmp (INT (5), INT (37)); | |
2201 | big.intersect (tmp); | |
2202 | ASSERT_TRUE (big.num_pairs () == 4); | |
2203 | ||
2204 | // Test that [10,10][20,20] does NOT contain 15. | |
2205 | { | |
2206 | int_range_max i1 (build_int_cst (integer_type_node, 10), | |
2207 | build_int_cst (integer_type_node, 10)); | |
2208 | int_range_max i2 (build_int_cst (integer_type_node, 20), | |
2209 | build_int_cst (integer_type_node, 20)); | |
2210 | i1.union_ (i2); | |
2211 | ASSERT_FALSE (i1.contains_p (build_int_cst (integer_type_node, 15))); | |
2212 | } | |
2213 | } | |
2214 | ||
2215 | static void | |
2216 | range_tests_legacy () | |
2217 | { | |
2218 | // Test truncating copy to int_range<1>. | |
2219 | int_range<3> big = build_range3 (10, 20, 30, 40, 50, 60); | |
2220 | int_range<1> small = big; | |
2221 | ASSERT_TRUE (small == int_range<1> (INT (10), INT (60))); | |
2222 | ||
2223 | // Test truncating copy to int_range<2>. | |
2224 | int_range<2> medium = big; | |
2225 | ASSERT_TRUE (!medium.undefined_p ()); | |
2226 | ||
2227 | // Test that a truncating copy of [MIN,20][22,40][80,MAX] | |
2228 | // ends up as a conservative anti-range of ~[21,21]. | |
2229 | big = int_range<3> (vrp_val_min (integer_type_node), INT (20)); | |
2230 | big.union_ (int_range<1> (INT (22), INT (40))); | |
2231 | big.union_ (int_range<1> (INT (80), vrp_val_max (integer_type_node))); | |
2232 | small = big; | |
2233 | ASSERT_TRUE (small == int_range<1> (INT (21), INT (21), VR_ANTI_RANGE)); | |
2234 | ||
2235 | // Copying a legacy symbolic to an int_range should normalize the | |
2236 | // symbolic at copy time. | |
2237 | { | |
2238 | tree ssa = make_ssa_name (integer_type_node); | |
2239 | value_range legacy_range (ssa, INT (25)); | |
2240 | int_range<2> copy = legacy_range; | |
2241 | ASSERT_TRUE (copy == int_range<2> (vrp_val_min (integer_type_node), | |
2242 | INT (25))); | |
2243 | ||
2244 | // Test that copying ~[abc_23, abc_23] to a multi-range yields varying. | |
2245 | legacy_range = value_range (ssa, ssa, VR_ANTI_RANGE); | |
2246 | copy = legacy_range; | |
2247 | ASSERT_TRUE (copy.varying_p ()); | |
2248 | } | |
2249 | } | |
2250 | ||
3d3470e2 AH |
2251 | // Simulate -fstrict-enums where the domain of a type is less than the |
2252 | // underlying type. | |
2253 | ||
2254 | static void | |
2255 | range_tests_strict_enum () | |
2256 | { | |
2257 | // The enum can only hold [0, 3]. | |
2258 | tree rtype = copy_node (unsigned_type_node); | |
2259 | TYPE_MIN_VALUE (rtype) = build_int_cstu (rtype, 0); | |
2260 | TYPE_MAX_VALUE (rtype) = build_int_cstu (rtype, 3); | |
2261 | ||
2262 | // Test that even though vr1 covers the strict enum domain ([0, 3]), | |
2263 | // it does not cover the domain of the underlying type. | |
2264 | int_range<1> vr1 (build_int_cstu (rtype, 0), build_int_cstu (rtype, 1)); | |
2265 | int_range<1> vr2 (build_int_cstu (rtype, 2), build_int_cstu (rtype, 3)); | |
2266 | vr1.union_ (vr2); | |
2267 | ASSERT_TRUE (vr1 == int_range<1> (build_int_cstu (rtype, 0), | |
2268 | build_int_cstu (rtype, 3))); | |
2269 | ASSERT_FALSE (vr1.varying_p ()); | |
2270 | ||
2271 | // Test that copying to a multi-range does not change things. | |
2272 | int_range<2> ir1 (vr1); | |
2273 | ASSERT_TRUE (ir1 == vr1); | |
2274 | ASSERT_FALSE (ir1.varying_p ()); | |
2275 | ||
2276 | // The same test as above, but using TYPE_{MIN,MAX}_VALUE instead of [0,3]. | |
2277 | vr1 = int_range<1> (TYPE_MIN_VALUE (rtype), TYPE_MAX_VALUE (rtype)); | |
2278 | ir1 = vr1; | |
2279 | ASSERT_TRUE (ir1 == vr1); | |
2280 | ASSERT_FALSE (ir1.varying_p ()); | |
2281 | } | |
2282 | ||
b5cff0db AH |
2283 | static void |
2284 | range_tests_misc () | |
2285 | { | |
2286 | tree u128_type = build_nonstandard_integer_type (128, /*unsigned=*/1); | |
2287 | int_range<1> i1, i2, i3; | |
2288 | int_range<1> r0, r1, rold; | |
2289 | ||
2290 | // Test 1-bit signed integer union. | |
2291 | // [-1,-1] U [0,0] = VARYING. | |
2292 | tree one_bit_type = build_nonstandard_integer_type (1, 0); | |
2293 | tree one_bit_min = vrp_val_min (one_bit_type); | |
2294 | tree one_bit_max = vrp_val_max (one_bit_type); | |
2295 | { | |
2296 | int_range<2> min (one_bit_min, one_bit_min); | |
2297 | int_range<2> max (one_bit_max, one_bit_max); | |
2298 | max.union_ (min); | |
2299 | ASSERT_TRUE (max.varying_p ()); | |
2300 | } | |
2301 | ||
2302 | // Test inversion of 1-bit signed integers. | |
2303 | { | |
2304 | int_range<2> min (one_bit_min, one_bit_min); | |
2305 | int_range<2> max (one_bit_max, one_bit_max); | |
2306 | int_range<2> t; | |
2307 | t = min; | |
2308 | t.invert (); | |
2309 | ASSERT_TRUE (t == max); | |
2310 | t = max; | |
2311 | t.invert (); | |
2312 | ASSERT_TRUE (t == min); | |
2313 | } | |
2314 | ||
2315 | // Test that NOT(255) is [0..254] in 8-bit land. | |
2316 | int_range<1> not_255 (UCHAR (255), UCHAR (255), VR_ANTI_RANGE); | |
2317 | ASSERT_TRUE (not_255 == int_range<1> (UCHAR (0), UCHAR (254))); | |
2318 | ||
2319 | // Test that NOT(0) is [1..255] in 8-bit land. | |
2320 | int_range<1> not_zero = range_nonzero (unsigned_char_type_node); | |
2321 | ASSERT_TRUE (not_zero == int_range<1> (UCHAR (1), UCHAR (255))); | |
2322 | ||
2323 | // Check that [0,127][0x..ffffff80,0x..ffffff] | |
2324 | // => ~[128, 0x..ffffff7f]. | |
2325 | r0 = int_range<1> (UINT128 (0), UINT128 (127)); | |
2326 | tree high = build_minus_one_cst (u128_type); | |
2327 | // low = -1 - 127 => 0x..ffffff80. | |
2328 | tree low = fold_build2 (MINUS_EXPR, u128_type, high, UINT128(127)); | |
2329 | r1 = int_range<1> (low, high); // [0x..ffffff80, 0x..ffffffff] | |
2330 | // r0 = [0,127][0x..ffffff80,0x..fffffff]. | |
2331 | r0.union_ (r1); | |
2332 | // r1 = [128, 0x..ffffff7f]. | |
2333 | r1 = int_range<1> (UINT128(128), | |
2334 | fold_build2 (MINUS_EXPR, u128_type, | |
2335 | build_minus_one_cst (u128_type), | |
2336 | UINT128(128))); | |
2337 | r0.invert (); | |
2338 | ASSERT_TRUE (r0 == r1); | |
2339 | ||
2340 | r0.set_varying (integer_type_node); | |
2341 | tree minint = wide_int_to_tree (integer_type_node, r0.lower_bound ()); | |
2342 | tree maxint = wide_int_to_tree (integer_type_node, r0.upper_bound ()); | |
2343 | ||
2344 | r0.set_varying (short_integer_type_node); | |
2345 | ||
2346 | r0.set_varying (unsigned_type_node); | |
2347 | tree maxuint = wide_int_to_tree (unsigned_type_node, r0.upper_bound ()); | |
2348 | ||
2349 | // Check that ~[0,5] => [6,MAX] for unsigned int. | |
2350 | r0 = int_range<1> (UINT (0), UINT (5)); | |
2351 | r0.invert (); | |
2352 | ASSERT_TRUE (r0 == int_range<1> (UINT(6), maxuint)); | |
2353 | ||
2354 | // Check that ~[10,MAX] => [0,9] for unsigned int. | |
2355 | r0 = int_range<1> (UINT(10), maxuint); | |
2356 | r0.invert (); | |
2357 | ASSERT_TRUE (r0 == int_range<1> (UINT (0), UINT (9))); | |
2358 | ||
2359 | // Check that ~[0,5] => [6,MAX] for unsigned 128-bit numbers. | |
2360 | r0 = int_range<1> (UINT128 (0), UINT128 (5), VR_ANTI_RANGE); | |
2361 | r1 = int_range<1> (UINT128(6), build_minus_one_cst (u128_type)); | |
2362 | ASSERT_TRUE (r0 == r1); | |
2363 | ||
2364 | // Check that [~5] is really [-MIN,4][6,MAX]. | |
2365 | r0 = int_range<1> (INT (5), INT (5), VR_ANTI_RANGE); | |
2366 | r1 = int_range<1> (minint, INT (4)); | |
2367 | r1.union_ (int_range<1> (INT (6), maxint)); | |
2368 | ASSERT_FALSE (r1.undefined_p ()); | |
2369 | ASSERT_TRUE (r0 == r1); | |
2370 | ||
2371 | r1 = int_range<1> (INT (5), INT (5)); | |
2372 | int_range<1> r2 (r1); | |
2373 | ASSERT_TRUE (r1 == r2); | |
2374 | ||
2375 | r1 = int_range<1> (INT (5), INT (10)); | |
2376 | ||
2377 | r1 = int_range<1> (integer_type_node, | |
2378 | wi::to_wide (INT (5)), wi::to_wide (INT (10))); | |
2379 | ASSERT_TRUE (r1.contains_p (INT (7))); | |
2380 | ||
2381 | r1 = int_range<1> (SCHAR (0), SCHAR (20)); | |
2382 | ASSERT_TRUE (r1.contains_p (SCHAR(15))); | |
2383 | ASSERT_FALSE (r1.contains_p (SCHAR(300))); | |
2384 | ||
2385 | // NOT([10,20]) ==> [-MIN,9][21,MAX]. | |
2386 | r0 = r1 = int_range<1> (INT (10), INT (20)); | |
2387 | r2 = int_range<1> (minint, INT(9)); | |
2388 | r2.union_ (int_range<1> (INT(21), maxint)); | |
2389 | ASSERT_FALSE (r2.undefined_p ()); | |
2390 | r1.invert (); | |
2391 | ASSERT_TRUE (r1 == r2); | |
2392 | // Test that NOT(NOT(x)) == x. | |
2393 | r2.invert (); | |
2394 | ASSERT_TRUE (r0 == r2); | |
2395 | ||
2396 | // Test that booleans and their inverse work as expected. | |
2397 | r0 = range_zero (boolean_type_node); | |
2398 | ASSERT_TRUE (r0 == int_range<1> (build_zero_cst (boolean_type_node), | |
2399 | build_zero_cst (boolean_type_node))); | |
2400 | r0.invert (); | |
2401 | ASSERT_TRUE (r0 == int_range<1> (build_one_cst (boolean_type_node), | |
2402 | build_one_cst (boolean_type_node))); | |
2403 | ||
2404 | // Make sure NULL and non-NULL of pointer types work, and that | |
2405 | // inverses of them are consistent. | |
2406 | tree voidp = build_pointer_type (void_type_node); | |
2407 | r0 = range_zero (voidp); | |
2408 | r1 = r0; | |
2409 | r0.invert (); | |
2410 | r0.invert (); | |
2411 | ASSERT_TRUE (r0 == r1); | |
2412 | ||
2413 | // [10,20] U [15, 30] => [10, 30]. | |
2414 | r0 = int_range<1> (INT (10), INT (20)); | |
2415 | r1 = int_range<1> (INT (15), INT (30)); | |
2416 | r0.union_ (r1); | |
2417 | ASSERT_TRUE (r0 == int_range<1> (INT (10), INT (30))); | |
2418 | ||
2419 | // [15,40] U [] => [15,40]. | |
2420 | r0 = int_range<1> (INT (15), INT (40)); | |
2421 | r1.set_undefined (); | |
2422 | r0.union_ (r1); | |
2423 | ASSERT_TRUE (r0 == int_range<1> (INT (15), INT (40))); | |
2424 | ||
2425 | // [10,20] U [10,10] => [10,20]. | |
2426 | r0 = int_range<1> (INT (10), INT (20)); | |
2427 | r1 = int_range<1> (INT (10), INT (10)); | |
2428 | r0.union_ (r1); | |
2429 | ASSERT_TRUE (r0 == int_range<1> (INT (10), INT (20))); | |
2430 | ||
2431 | // [10,20] U [9,9] => [9,20]. | |
2432 | r0 = int_range<1> (INT (10), INT (20)); | |
2433 | r1 = int_range<1> (INT (9), INT (9)); | |
2434 | r0.union_ (r1); | |
2435 | ASSERT_TRUE (r0 == int_range<1> (INT (9), INT (20))); | |
2436 | ||
2437 | // [10,20] ^ [15,30] => [15,20]. | |
2438 | r0 = int_range<1> (INT (10), INT (20)); | |
2439 | r1 = int_range<1> (INT (15), INT (30)); | |
2440 | r0.intersect (r1); | |
2441 | ASSERT_TRUE (r0 == int_range<1> (INT (15), INT (20))); | |
2442 | ||
2443 | // Test the internal sanity of wide_int's wrt HWIs. | |
2444 | ASSERT_TRUE (wi::max_value (TYPE_PRECISION (boolean_type_node), | |
2445 | TYPE_SIGN (boolean_type_node)) | |
2446 | == wi::uhwi (1, TYPE_PRECISION (boolean_type_node))); | |
2447 | ||
2448 | // Test zero_p(). | |
2449 | r0 = int_range<1> (INT (0), INT (0)); | |
2450 | ASSERT_TRUE (r0.zero_p ()); | |
2451 | ||
2452 | // Test nonzero_p(). | |
2453 | r0 = int_range<1> (INT (0), INT (0)); | |
2454 | r0.invert (); | |
2455 | ASSERT_TRUE (r0.nonzero_p ()); | |
2456 | ||
2457 | // test legacy interaction | |
2458 | // r0 = ~[1,1] | |
2459 | r0 = int_range<1> (UINT (1), UINT (1), VR_ANTI_RANGE); | |
2460 | // r1 = ~[3,3] | |
2461 | r1 = int_range<1> (UINT (3), UINT (3), VR_ANTI_RANGE); | |
2462 | ||
2463 | // vv = [0,0][2,2][4, MAX] | |
2464 | int_range<3> vv = r0; | |
2465 | vv.intersect (r1); | |
2466 | ||
2467 | ASSERT_TRUE (vv.contains_p (UINT (2))); | |
2468 | ASSERT_TRUE (vv.num_pairs () == 3); | |
2469 | ||
2470 | // create r0 as legacy [1,1] | |
2471 | r0 = int_range<1> (UINT (1), UINT (1)); | |
2472 | // And union it with [0,0][2,2][4,MAX] multi range | |
2473 | r0.union_ (vv); | |
2474 | // The result should be [0,2][4,MAX], or ~[3,3] but it must contain 2 | |
2475 | ASSERT_TRUE (r0.contains_p (UINT (2))); | |
2476 | } | |
2477 | ||
2478 | void | |
2479 | range_tests () | |
2480 | { | |
2481 | range_tests_legacy (); | |
2482 | range_tests_irange3 (); | |
2483 | range_tests_int_range_max (); | |
3d3470e2 | 2484 | range_tests_strict_enum (); |
b5cff0db AH |
2485 | range_tests_misc (); |
2486 | } | |
2487 | ||
2488 | } // namespace selftest | |
2489 | ||
2490 | #endif // CHECKING_P |