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808f4dfe | 1 | /* Symbolic values. |
a945c346 | 2 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
808f4dfe DM |
3 | Contributed by David Malcolm <dmalcolm@redhat.com>. |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GCC; see the file COPYING3. If not see | |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "config.h" | |
6341f14e | 22 | #define INCLUDE_MEMORY |
808f4dfe DM |
23 | #include "system.h" |
24 | #include "coretypes.h" | |
25 | #include "tree.h" | |
26 | #include "diagnostic-core.h" | |
27 | #include "gimple-pretty-print.h" | |
28 | #include "function.h" | |
29 | #include "basic-block.h" | |
30 | #include "gimple.h" | |
31 | #include "gimple-iterator.h" | |
32 | #include "diagnostic-core.h" | |
33 | #include "graphviz.h" | |
34 | #include "options.h" | |
35 | #include "cgraph.h" | |
36 | #include "tree-dfa.h" | |
37 | #include "stringpool.h" | |
38 | #include "convert.h" | |
39 | #include "target.h" | |
40 | #include "fold-const.h" | |
41 | #include "tree-pretty-print.h" | |
808f4dfe | 42 | #include "bitmap.h" |
808f4dfe DM |
43 | #include "analyzer/analyzer.h" |
44 | #include "analyzer/analyzer-logging.h" | |
808f4dfe DM |
45 | #include "analyzer/call-string.h" |
46 | #include "analyzer/program-point.h" | |
47 | #include "analyzer/store.h" | |
e9751143 | 48 | #include "analyzer/svalue.h" |
808f4dfe | 49 | #include "analyzer/region-model.h" |
2eff4fe3 DM |
50 | #include "diagnostic.h" |
51 | #include "tree-diagnostic.h" | |
808f4dfe DM |
52 | |
53 | #if ENABLE_ANALYZER | |
54 | ||
55 | namespace ana { | |
56 | ||
6ad3ca00 DM |
57 | static int cmp_csts_and_types (const_tree cst1, const_tree cst2); |
58 | ||
808f4dfe DM |
59 | /* class svalue and its various subclasses. */ |
60 | ||
61 | /* class svalue. */ | |
62 | ||
63 | /* Dump a representation of this svalue to stderr. */ | |
64 | ||
65 | DEBUG_FUNCTION void | |
66 | svalue::dump (bool simple) const | |
67 | { | |
68 | pretty_printer pp; | |
69 | pp_format_decoder (&pp) = default_tree_printer; | |
70 | pp_show_color (&pp) = pp_show_color (global_dc->printer); | |
71 | pp.buffer->stream = stderr; | |
72 | dump_to_pp (&pp, simple); | |
73 | pp_newline (&pp); | |
74 | pp_flush (&pp); | |
75 | } | |
76 | ||
77 | /* Generate a textual representation of this svalue for debugging purposes. */ | |
78 | ||
79 | label_text | |
80 | svalue::get_desc (bool simple) const | |
81 | { | |
82 | pretty_printer pp; | |
83 | pp_format_decoder (&pp) = default_tree_printer; | |
84 | dump_to_pp (&pp, simple); | |
85 | return label_text::take (xstrdup (pp_formatted_text (&pp))); | |
86 | } | |
87 | ||
809192e7 DM |
88 | /* Return a new json::string describing the svalue. */ |
89 | ||
90 | json::value * | |
91 | svalue::to_json () const | |
92 | { | |
93 | label_text desc = get_desc (true); | |
f858fe7a | 94 | json::value *sval_js = new json::string (desc.get ()); |
809192e7 DM |
95 | return sval_js; |
96 | } | |
97 | ||
808f4dfe DM |
98 | /* If this svalue is a constant_svalue, return the underlying tree constant. |
99 | Otherwise return NULL_TREE. */ | |
100 | ||
101 | tree | |
102 | svalue::maybe_get_constant () const | |
103 | { | |
eafa9d96 DM |
104 | const svalue *sval = unwrap_any_unmergeable (); |
105 | if (const constant_svalue *cst_sval = sval->dyn_cast_constant_svalue ()) | |
808f4dfe DM |
106 | return cst_sval->get_constant (); |
107 | else | |
108 | return NULL_TREE; | |
109 | } | |
110 | ||
5932dd35 DM |
111 | /* If this svalue is a region_svalue, return the region it points to. |
112 | Otherwise return NULL. */ | |
113 | ||
114 | const region * | |
115 | svalue::maybe_get_region () const | |
116 | { | |
117 | if (const region_svalue *region_sval = dyn_cast_region_svalue ()) | |
118 | return region_sval->get_pointee (); | |
119 | else | |
120 | return NULL; | |
121 | } | |
122 | ||
ecdb9322 DM |
123 | /* If this svalue is a cast (i.e a unaryop NOP_EXPR or VIEW_CONVERT_EXPR), |
124 | return the underlying svalue. | |
808f4dfe DM |
125 | Otherwise return NULL. */ |
126 | ||
127 | const svalue * | |
128 | svalue::maybe_undo_cast () const | |
129 | { | |
130 | if (const unaryop_svalue *unaryop_sval = dyn_cast_unaryop_svalue ()) | |
ecdb9322 DM |
131 | { |
132 | enum tree_code op = unaryop_sval->get_op (); | |
133 | if (op == NOP_EXPR || op == VIEW_CONVERT_EXPR) | |
134 | return unaryop_sval->get_arg (); | |
135 | } | |
808f4dfe DM |
136 | return NULL; |
137 | } | |
138 | ||
139 | /* If this svalue is an unmergeable decorator around another svalue, return | |
140 | the underlying svalue. | |
141 | Otherwise return this svalue. */ | |
142 | ||
143 | const svalue * | |
144 | svalue::unwrap_any_unmergeable () const | |
145 | { | |
146 | if (const unmergeable_svalue *unmergeable = dyn_cast_unmergeable_svalue ()) | |
147 | return unmergeable->get_arg (); | |
148 | return this; | |
149 | } | |
150 | ||
151 | /* Attempt to merge THIS with OTHER, returning the merged svalue. | |
152 | Return NULL if not mergeable. */ | |
153 | ||
154 | const svalue * | |
155 | svalue::can_merge_p (const svalue *other, | |
156 | region_model_manager *mgr, | |
157 | model_merger *merger) const | |
158 | { | |
159 | if (!(get_type () && other->get_type ())) | |
160 | return NULL; | |
161 | ||
162 | if (!types_compatible_p (get_type (), other->get_type ())) | |
163 | return NULL; | |
164 | ||
165 | /* Reject attempts to merge unmergeable svalues. */ | |
166 | if ((get_kind () == SK_UNMERGEABLE) | |
167 | || (other->get_kind () == SK_UNMERGEABLE)) | |
168 | return NULL; | |
169 | ||
33255ad3 DM |
170 | /* Reject attempts to merge poisoned svalues with other svalues |
171 | (either non-poisoned, or other kinds of poison), so that e.g. | |
172 | we identify paths in which a variable is conditionally uninitialized. */ | |
173 | if (get_kind () == SK_POISONED | |
174 | || other->get_kind () == SK_POISONED) | |
175 | return NULL; | |
176 | ||
808f4dfe DM |
177 | /* Reject attempts to merge NULL pointers with not-NULL-pointers. */ |
178 | if (POINTER_TYPE_P (get_type ())) | |
179 | { | |
180 | bool null0 = false; | |
181 | bool null1 = false; | |
182 | if (tree cst0 = maybe_get_constant ()) | |
183 | if (zerop (cst0)) | |
184 | null0 = true; | |
185 | if (tree cst1 = other->maybe_get_constant ()) | |
186 | if (zerop (cst1)) | |
187 | null1 = true; | |
188 | if (null0 != null1) | |
189 | return NULL; | |
190 | } | |
191 | ||
f573d351 DM |
192 | /* Reject merging svalues that have non-purgable sm-state, |
193 | to avoid falsely reporting memory leaks by merging them | |
194 | with something else. */ | |
195 | if (!merger->mergeable_svalue_p (this)) | |
196 | return NULL; | |
197 | if (!merger->mergeable_svalue_p (other)) | |
198 | return NULL; | |
199 | ||
808f4dfe DM |
200 | /* Widening. */ |
201 | /* Merge: (new_cst, existing_cst) -> widen (existing, new). */ | |
202 | if (maybe_get_constant () && other->maybe_get_constant ()) | |
203 | { | |
204 | return mgr->get_or_create_widening_svalue (other->get_type (), | |
e6fe02d8 | 205 | merger->get_function_point (), |
808f4dfe DM |
206 | other, this); |
207 | } | |
208 | ||
2fc20138 DM |
209 | /* Merger of: |
210 | this: BINOP (X, OP, CST) | |
211 | other: X, where X is non-widening | |
212 | to: WIDENING (other, this). */ | |
213 | if (const binop_svalue *binop_sval = dyn_cast_binop_svalue ()) | |
214 | if (binop_sval->get_arg0 () == other | |
215 | && binop_sval->get_arg1 ()->get_kind () == SK_CONSTANT | |
216 | && other->get_kind () != SK_WIDENING) | |
217 | return mgr->get_or_create_widening_svalue (other->get_type (), | |
e6fe02d8 | 218 | merger->get_function_point (), |
2fc20138 DM |
219 | other, this); |
220 | ||
808f4dfe DM |
221 | /* Merge: (Widen(existing_val, V), existing_val) -> Widen (existing_val, V) |
222 | and thus get a fixed point. */ | |
223 | if (const widening_svalue *widen_sval = dyn_cast_widening_svalue ()) | |
224 | { | |
225 | if (other == widen_sval->get_base_svalue ()) | |
226 | return this; | |
227 | if (other == widen_sval->get_iter_svalue ()) | |
228 | return this; | |
229 | } | |
230 | ||
231 | if (const binop_svalue *binop_sval = dyn_cast_binop_svalue ()) | |
232 | if (const widening_svalue *widen_arg0 | |
233 | = binop_sval->get_arg0 ()->dyn_cast_widening_svalue ()) | |
234 | { | |
235 | if (other == binop_sval->get_arg1 ()) | |
236 | { | |
237 | /* Merger of: (Widen(..., OTHER) BINOP X) | |
238 | and : OTHER | |
239 | to : (Widen(..., OTHER) BINOP X) | |
240 | e.g. merge of Widen(0, 1) + 1 with 1 to the Widen(0, 1) + 1. */ | |
241 | return this; | |
242 | } | |
243 | ||
244 | /* Merger of : (Widen() BINOP X) | |
245 | and : Widen() | |
246 | to : Widen() | |
247 | e.g. merge of Widen(0, 1) + 1 and Widen(0, 1) to Widen(0, 1). | |
248 | However, we want to update constraints for this case, since we're | |
249 | considering another iteration. | |
250 | Presumably we also want to ensure that it converges; we don't want | |
251 | a descending chain of constraints. */ | |
252 | if (other == widen_arg0) | |
253 | { | |
841008d3 | 254 | merger->on_widening_reuse (widen_arg0); |
808f4dfe DM |
255 | return widen_arg0; |
256 | } | |
2fc20138 DM |
257 | |
258 | /* Merger of: | |
259 | this: BINOP(WIDENING(BASE, BINOP(BASE, X)), X) | |
260 | other: BINOP(BASE, X) | |
261 | to: WIDENING(BASE, BINOP(BASE, X)). */ | |
262 | if (widen_arg0->get_iter_svalue () == other) | |
263 | if (const binop_svalue *other_binop_sval | |
264 | = other->dyn_cast_binop_svalue ()) | |
265 | if (other_binop_sval->get_arg0 () == widen_arg0->get_base_svalue () | |
266 | && other_binop_sval->get_arg1 () == binop_sval->get_arg1 ()) | |
267 | return widen_arg0; | |
808f4dfe DM |
268 | } |
269 | ||
270 | return mgr->get_or_create_unknown_svalue (get_type ()); | |
271 | } | |
272 | ||
273 | /* Determine if this svalue is either within LIVE_SVALUES, or is implicitly | |
e0139b2a DM |
274 | live with respect to LIVE_SVALUES and MODEL. |
275 | LIVE_SVALUES can be NULL, in which case determine if this svalue is | |
276 | intrinsically live. */ | |
808f4dfe DM |
277 | |
278 | bool | |
e0139b2a | 279 | svalue::live_p (const svalue_set *live_svalues, |
808f4dfe DM |
280 | const region_model *model) const |
281 | { | |
282 | /* Determine if SVAL is explicitly live. */ | |
e0139b2a DM |
283 | if (live_svalues) |
284 | if (const_cast<svalue_set *> (live_svalues)->contains (this)) | |
285 | return true; | |
808f4dfe DM |
286 | |
287 | /* Otherwise, determine if SVAL is implicitly live due to being made of | |
288 | other live svalues. */ | |
289 | return implicitly_live_p (live_svalues, model); | |
290 | } | |
291 | ||
292 | /* Base implementation of svalue::implicitly_live_p. */ | |
293 | ||
294 | bool | |
e0139b2a | 295 | svalue::implicitly_live_p (const svalue_set *, const region_model *) const |
808f4dfe DM |
296 | { |
297 | return false; | |
298 | } | |
299 | ||
b0702ac5 DM |
300 | /* Comparator for imposing a deterministic order on constants that are |
301 | of the same type. */ | |
302 | ||
303 | static int | |
6ad3ca00 | 304 | cmp_csts_same_type (const_tree cst1, const_tree cst2) |
b0702ac5 DM |
305 | { |
306 | gcc_assert (TREE_TYPE (cst1) == TREE_TYPE (cst2)); | |
307 | gcc_assert (TREE_CODE (cst1) == TREE_CODE (cst2)); | |
308 | switch (TREE_CODE (cst1)) | |
309 | { | |
310 | default: | |
311 | gcc_unreachable (); | |
312 | case INTEGER_CST: | |
313 | return tree_int_cst_compare (cst1, cst2); | |
314 | case STRING_CST: | |
315 | return strcmp (TREE_STRING_POINTER (cst1), | |
316 | TREE_STRING_POINTER (cst2)); | |
317 | case REAL_CST: | |
318 | /* Impose an arbitrary but deterministic order. */ | |
319 | return memcmp (TREE_REAL_CST_PTR (cst1), | |
320 | TREE_REAL_CST_PTR (cst2), | |
321 | sizeof (real_value)); | |
54cbdb52 | 322 | case COMPLEX_CST: |
6ad3ca00 DM |
323 | if (int cmp_real = cmp_csts_and_types (TREE_REALPART (cst1), |
324 | TREE_REALPART (cst2))) | |
54cbdb52 | 325 | return cmp_real; |
6ad3ca00 | 326 | return cmp_csts_and_types (TREE_IMAGPART (cst1), TREE_IMAGPART (cst2)); |
b0702ac5 DM |
327 | case VECTOR_CST: |
328 | if (int cmp_log2_npatterns | |
329 | = ((int)VECTOR_CST_LOG2_NPATTERNS (cst1) | |
330 | - (int)VECTOR_CST_LOG2_NPATTERNS (cst2))) | |
331 | return cmp_log2_npatterns; | |
332 | if (int cmp_nelts_per_pattern | |
333 | = ((int)VECTOR_CST_NELTS_PER_PATTERN (cst1) | |
334 | - (int)VECTOR_CST_NELTS_PER_PATTERN (cst2))) | |
335 | return cmp_nelts_per_pattern; | |
336 | unsigned encoded_nelts = vector_cst_encoded_nelts (cst1); | |
337 | for (unsigned i = 0; i < encoded_nelts; i++) | |
b209a349 DM |
338 | { |
339 | const_tree elt1 = VECTOR_CST_ENCODED_ELT (cst1, i); | |
340 | const_tree elt2 = VECTOR_CST_ENCODED_ELT (cst2, i); | |
6ad3ca00 | 341 | if (int el_cmp = cmp_csts_and_types (elt1, elt2)) |
b209a349 DM |
342 | return el_cmp; |
343 | } | |
b0702ac5 DM |
344 | return 0; |
345 | } | |
346 | } | |
347 | ||
6ad3ca00 DM |
348 | /* Comparator for imposing a deterministic order on constants that might |
349 | not be of the same type. */ | |
350 | ||
351 | static int | |
352 | cmp_csts_and_types (const_tree cst1, const_tree cst2) | |
353 | { | |
354 | int t1 = TYPE_UID (TREE_TYPE (cst1)); | |
355 | int t2 = TYPE_UID (TREE_TYPE (cst2)); | |
356 | if (int cmp_type = t1 - t2) | |
357 | return cmp_type; | |
358 | return cmp_csts_same_type (cst1, cst2); | |
359 | } | |
360 | ||
b0702ac5 DM |
361 | /* Comparator for imposing a deterministic order on svalues. */ |
362 | ||
363 | int | |
364 | svalue::cmp_ptr (const svalue *sval1, const svalue *sval2) | |
365 | { | |
366 | if (sval1 == sval2) | |
367 | return 0; | |
368 | if (int cmp_kind = sval1->get_kind () - sval2->get_kind ()) | |
369 | return cmp_kind; | |
370 | int t1 = sval1->get_type () ? TYPE_UID (sval1->get_type ()) : -1; | |
371 | int t2 = sval2->get_type () ? TYPE_UID (sval2->get_type ()) : -1; | |
372 | if (int cmp_type = t1 - t2) | |
373 | return cmp_type; | |
374 | switch (sval1->get_kind ()) | |
375 | { | |
376 | default: | |
377 | gcc_unreachable (); | |
378 | case SK_REGION: | |
379 | { | |
380 | const region_svalue *region_sval1 = (const region_svalue *)sval1; | |
381 | const region_svalue *region_sval2 = (const region_svalue *)sval2; | |
382 | return region::cmp_ids (region_sval1->get_pointee (), | |
383 | region_sval2->get_pointee ()); | |
384 | } | |
385 | break; | |
386 | case SK_CONSTANT: | |
387 | { | |
388 | const constant_svalue *constant_sval1 = (const constant_svalue *)sval1; | |
389 | const constant_svalue *constant_sval2 = (const constant_svalue *)sval2; | |
390 | const_tree cst1 = constant_sval1->get_constant (); | |
391 | const_tree cst2 = constant_sval2->get_constant (); | |
6ad3ca00 | 392 | return cmp_csts_same_type (cst1, cst2); |
b0702ac5 DM |
393 | } |
394 | break; | |
395 | case SK_UNKNOWN: | |
396 | { | |
397 | gcc_assert (sval1 == sval2); | |
398 | return 0; | |
399 | } | |
400 | break; | |
401 | case SK_POISONED: | |
402 | { | |
403 | const poisoned_svalue *poisoned_sval1 = (const poisoned_svalue *)sval1; | |
404 | const poisoned_svalue *poisoned_sval2 = (const poisoned_svalue *)sval2; | |
405 | return (poisoned_sval1->get_poison_kind () | |
406 | - poisoned_sval2->get_poison_kind ()); | |
407 | } | |
408 | break; | |
409 | case SK_SETJMP: | |
410 | { | |
411 | const setjmp_svalue *setjmp_sval1 = (const setjmp_svalue *)sval1; | |
412 | const setjmp_svalue *setjmp_sval2 = (const setjmp_svalue *)sval2; | |
413 | const setjmp_record &rec1 = setjmp_sval1->get_setjmp_record (); | |
414 | const setjmp_record &rec2 = setjmp_sval2->get_setjmp_record (); | |
415 | return setjmp_record::cmp (rec1, rec2); | |
416 | } | |
417 | break; | |
418 | case SK_INITIAL: | |
419 | { | |
420 | const initial_svalue *initial_sval1 = (const initial_svalue *)sval1; | |
421 | const initial_svalue *initial_sval2 = (const initial_svalue *)sval2; | |
422 | return region::cmp_ids (initial_sval1->get_region (), | |
423 | initial_sval2->get_region ()); | |
424 | } | |
425 | break; | |
426 | case SK_UNARYOP: | |
427 | { | |
428 | const unaryop_svalue *unaryop_sval1 = (const unaryop_svalue *)sval1; | |
429 | const unaryop_svalue *unaryop_sval2 = (const unaryop_svalue *)sval2; | |
430 | if (int op_cmp = unaryop_sval1->get_op () - unaryop_sval2->get_op ()) | |
431 | return op_cmp; | |
432 | return svalue::cmp_ptr (unaryop_sval1->get_arg (), | |
433 | unaryop_sval2->get_arg ()); | |
434 | } | |
435 | break; | |
436 | case SK_BINOP: | |
437 | { | |
438 | const binop_svalue *binop_sval1 = (const binop_svalue *)sval1; | |
439 | const binop_svalue *binop_sval2 = (const binop_svalue *)sval2; | |
440 | if (int op_cmp = binop_sval1->get_op () - binop_sval2->get_op ()) | |
441 | return op_cmp; | |
442 | if (int arg0_cmp = svalue::cmp_ptr (binop_sval1->get_arg0 (), | |
443 | binop_sval2->get_arg0 ())) | |
444 | return arg0_cmp; | |
445 | return svalue::cmp_ptr (binop_sval1->get_arg1 (), | |
446 | binop_sval2->get_arg1 ()); | |
447 | } | |
448 | break; | |
449 | case SK_SUB: | |
450 | { | |
451 | const sub_svalue *sub_sval1 = (const sub_svalue *)sval1; | |
452 | const sub_svalue *sub_sval2 = (const sub_svalue *)sval2; | |
453 | if (int parent_cmp = svalue::cmp_ptr (sub_sval1->get_parent (), | |
454 | sub_sval2->get_parent ())) | |
455 | return parent_cmp; | |
456 | return region::cmp_ids (sub_sval1->get_subregion (), | |
457 | sub_sval2->get_subregion ()); | |
458 | } | |
459 | break; | |
e61ffa20 DM |
460 | case SK_REPEATED: |
461 | { | |
462 | const repeated_svalue *repeated_sval1 = (const repeated_svalue *)sval1; | |
463 | const repeated_svalue *repeated_sval2 = (const repeated_svalue *)sval2; | |
464 | return svalue::cmp_ptr (repeated_sval1->get_inner_svalue (), | |
465 | repeated_sval2->get_inner_svalue ()); | |
466 | } | |
467 | break; | |
468 | case SK_BITS_WITHIN: | |
469 | { | |
470 | const bits_within_svalue *bits_within_sval1 | |
471 | = (const bits_within_svalue *)sval1; | |
472 | const bits_within_svalue *bits_within_sval2 | |
473 | = (const bits_within_svalue *)sval2; | |
474 | if (int cmp = bit_range::cmp (bits_within_sval1->get_bits (), | |
475 | bits_within_sval2->get_bits ())) | |
476 | return cmp; | |
477 | return svalue::cmp_ptr (bits_within_sval1->get_inner_svalue (), | |
478 | bits_within_sval2->get_inner_svalue ()); | |
479 | } | |
480 | break; | |
b0702ac5 DM |
481 | case SK_UNMERGEABLE: |
482 | { | |
483 | const unmergeable_svalue *unmergeable_sval1 | |
484 | = (const unmergeable_svalue *)sval1; | |
485 | const unmergeable_svalue *unmergeable_sval2 | |
486 | = (const unmergeable_svalue *)sval2; | |
487 | return svalue::cmp_ptr (unmergeable_sval1->get_arg (), | |
488 | unmergeable_sval2->get_arg ()); | |
489 | } | |
490 | break; | |
491 | case SK_PLACEHOLDER: | |
492 | { | |
493 | const placeholder_svalue *placeholder_sval1 | |
494 | = (const placeholder_svalue *)sval1; | |
495 | const placeholder_svalue *placeholder_sval2 | |
496 | = (const placeholder_svalue *)sval2; | |
497 | return strcmp (placeholder_sval1->get_name (), | |
498 | placeholder_sval2->get_name ()); | |
499 | } | |
500 | break; | |
501 | case SK_WIDENING: | |
502 | { | |
503 | const widening_svalue *widening_sval1 = (const widening_svalue *)sval1; | |
504 | const widening_svalue *widening_sval2 = (const widening_svalue *)sval2; | |
505 | if (int point_cmp = function_point::cmp (widening_sval1->get_point (), | |
506 | widening_sval2->get_point ())) | |
507 | return point_cmp; | |
508 | if (int base_cmp = svalue::cmp_ptr (widening_sval1->get_base_svalue (), | |
509 | widening_sval2->get_base_svalue ())) | |
510 | return base_cmp; | |
511 | return svalue::cmp_ptr (widening_sval1->get_iter_svalue (), | |
512 | widening_sval2->get_iter_svalue ()); | |
513 | } | |
514 | break; | |
515 | case SK_COMPOUND: | |
516 | { | |
517 | const compound_svalue *compound_sval1 = (const compound_svalue *)sval1; | |
518 | const compound_svalue *compound_sval2 = (const compound_svalue *)sval2; | |
519 | return binding_map::cmp (compound_sval1->get_map (), | |
520 | compound_sval2->get_map ()); | |
521 | } | |
522 | break; | |
523 | case SK_CONJURED: | |
524 | { | |
525 | const conjured_svalue *conjured_sval1 = (const conjured_svalue *)sval1; | |
526 | const conjured_svalue *conjured_sval2 = (const conjured_svalue *)sval2; | |
527 | if (int stmt_cmp = (conjured_sval1->get_stmt ()->uid | |
528 | - conjured_sval2->get_stmt ()->uid)) | |
529 | return stmt_cmp; | |
530 | return region::cmp_ids (conjured_sval1->get_id_region (), | |
531 | conjured_sval2->get_id_region ()); | |
532 | } | |
533 | break; | |
ded2c2c0 DM |
534 | case SK_ASM_OUTPUT: |
535 | { | |
536 | const asm_output_svalue *asm_output_sval1 | |
537 | = (const asm_output_svalue *)sval1; | |
538 | const asm_output_svalue *asm_output_sval2 | |
539 | = (const asm_output_svalue *)sval2; | |
540 | if (int asm_string_cmp = strcmp (asm_output_sval1->get_asm_string (), | |
541 | asm_output_sval2->get_asm_string ())) | |
542 | return asm_string_cmp; | |
543 | if (int output_idx_cmp = ((int)asm_output_sval1->get_output_idx () | |
544 | - (int)asm_output_sval2->get_output_idx ())) | |
545 | return output_idx_cmp; | |
546 | if (int cmp = ((int)asm_output_sval1->get_num_inputs () | |
547 | - (int)asm_output_sval2->get_num_inputs ())) | |
548 | return cmp; | |
549 | for (unsigned i = 0; i < asm_output_sval1->get_num_inputs (); i++) | |
550 | if (int input_cmp | |
551 | = svalue::cmp_ptr (asm_output_sval1->get_input (i), | |
552 | asm_output_sval2->get_input (i))) | |
553 | return input_cmp; | |
554 | return 0; | |
555 | } | |
556 | break; | |
aee1adf2 DM |
557 | case SK_CONST_FN_RESULT: |
558 | { | |
559 | const const_fn_result_svalue *const_fn_result_sval1 | |
560 | = (const const_fn_result_svalue *)sval1; | |
561 | const const_fn_result_svalue *const_fn_result_sval2 | |
562 | = (const const_fn_result_svalue *)sval2; | |
563 | int d1 = DECL_UID (const_fn_result_sval1->get_fndecl ()); | |
564 | int d2 = DECL_UID (const_fn_result_sval2->get_fndecl ()); | |
565 | if (int cmp_fndecl = d1 - d2) | |
566 | return cmp_fndecl; | |
567 | if (int cmp = ((int)const_fn_result_sval1->get_num_inputs () | |
568 | - (int)const_fn_result_sval2->get_num_inputs ())) | |
569 | return cmp; | |
570 | for (unsigned i = 0; i < const_fn_result_sval1->get_num_inputs (); i++) | |
571 | if (int input_cmp | |
572 | = svalue::cmp_ptr (const_fn_result_sval1->get_input (i), | |
573 | const_fn_result_sval2->get_input (i))) | |
574 | return input_cmp; | |
575 | return 0; | |
576 | } | |
b0702ac5 DM |
577 | } |
578 | } | |
579 | ||
580 | /* Comparator for use by vec<const svalue *>::qsort. */ | |
581 | ||
582 | int | |
583 | svalue::cmp_ptr_ptr (const void *p1, const void *p2) | |
584 | { | |
585 | const svalue *sval1 = *(const svalue * const *)p1; | |
586 | const svalue *sval2 = *(const svalue * const *)p2; | |
587 | return cmp_ptr (sval1, sval2); | |
588 | } | |
589 | ||
71fc4655 DM |
590 | /* Subclass of visitor for use in implementing svalue::involves_p. */ |
591 | ||
592 | class involvement_visitor : public visitor | |
593 | { | |
594 | public: | |
595 | involvement_visitor (const svalue *needle) | |
596 | : m_needle (needle), m_found (false) {} | |
597 | ||
2ac1459f | 598 | void visit_initial_svalue (const initial_svalue *candidate) final override |
71fc4655 DM |
599 | { |
600 | if (candidate == m_needle) | |
601 | m_found = true; | |
602 | } | |
603 | ||
2ac1459f | 604 | void visit_conjured_svalue (const conjured_svalue *candidate) final override |
33255ad3 DM |
605 | { |
606 | if (candidate == m_needle) | |
607 | m_found = true; | |
608 | } | |
609 | ||
841008d3 DM |
610 | void visit_widening_svalue (const widening_svalue *candidate) final override |
611 | { | |
612 | if (candidate == m_needle) | |
613 | m_found = true; | |
614 | } | |
615 | ||
71fc4655 DM |
616 | bool found_p () const { return m_found; } |
617 | ||
618 | private: | |
619 | const svalue *m_needle; | |
620 | bool m_found; | |
621 | }; | |
622 | ||
623 | /* Return true iff this svalue is defined in terms of OTHER. */ | |
624 | ||
625 | bool | |
626 | svalue::involves_p (const svalue *other) const | |
627 | { | |
33255ad3 DM |
628 | /* Currently only implemented for these kinds. */ |
629 | gcc_assert (other->get_kind () == SK_INITIAL | |
841008d3 DM |
630 | || other->get_kind () == SK_CONJURED |
631 | || other->get_kind () == SK_WIDENING); | |
71fc4655 DM |
632 | |
633 | involvement_visitor v (other); | |
634 | accept (&v); | |
635 | return v.found_p (); | |
636 | } | |
637 | ||
e61ffa20 DM |
638 | /* Extract SUBRANGE from this value, of type TYPE. */ |
639 | ||
640 | const svalue * | |
641 | svalue::extract_bit_range (tree type, | |
642 | const bit_range &subrange, | |
643 | region_model_manager *mgr) const | |
644 | { | |
645 | return mgr->get_or_create_bits_within (type, subrange, this); | |
646 | } | |
647 | ||
648 | /* Base implementation of svalue::maybe_fold_bits_within vfunc. */ | |
649 | ||
650 | const svalue * | |
651 | svalue::maybe_fold_bits_within (tree, | |
652 | const bit_range &, | |
653 | region_model_manager *) const | |
654 | { | |
655 | /* By default, don't fold. */ | |
656 | return NULL; | |
657 | } | |
658 | ||
48e8a7a6 DM |
659 | /* Base implementation of svalue::all_zeroes_p. |
660 | Return true if this value is known to be all zeroes. */ | |
661 | ||
662 | bool | |
663 | svalue::all_zeroes_p () const | |
664 | { | |
665 | return false; | |
666 | } | |
667 | ||
a358e4b6 DM |
668 | /* If this svalue is a pointer, attempt to determine the base region it points |
669 | to. Return NULL on any problems. */ | |
670 | ||
671 | const region * | |
672 | svalue::maybe_get_deref_base_region () const | |
673 | { | |
674 | const svalue *iter = this; | |
675 | while (1) | |
676 | { | |
677 | switch (iter->get_kind ()) | |
678 | { | |
679 | default: | |
680 | return NULL; | |
681 | ||
682 | case SK_REGION: | |
683 | { | |
684 | const region_svalue *region_sval | |
685 | = as_a <const region_svalue *> (iter); | |
686 | return region_sval->get_pointee ()->get_base_region (); | |
687 | } | |
688 | ||
689 | case SK_BINOP: | |
690 | { | |
691 | const binop_svalue *binop_sval | |
692 | = as_a <const binop_svalue *> (iter); | |
693 | switch (binop_sval->get_op ()) | |
694 | { | |
695 | case POINTER_PLUS_EXPR: | |
696 | /* If we have a symbolic value expressing pointer arithmetic, | |
697 | use the LHS. */ | |
698 | iter = binop_sval->get_arg0 (); | |
699 | continue; | |
700 | ||
701 | default: | |
702 | return NULL; | |
703 | } | |
704 | return NULL; | |
705 | } | |
706 | } | |
707 | } | |
708 | } | |
709 | ||
808f4dfe DM |
710 | /* class region_svalue : public svalue. */ |
711 | ||
712 | /* Implementation of svalue::dump_to_pp vfunc for region_svalue. */ | |
713 | ||
714 | void | |
715 | region_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
716 | { | |
717 | if (simple) | |
718 | { | |
719 | pp_string (pp, "&"); | |
720 | m_reg->dump_to_pp (pp, simple); | |
721 | } | |
722 | else | |
723 | { | |
724 | pp_string (pp, "region_svalue("); | |
187b213d DM |
725 | if (get_type ()) |
726 | { | |
727 | print_quoted_type (pp, get_type ()); | |
728 | pp_string (pp, ", "); | |
729 | } | |
808f4dfe DM |
730 | m_reg->dump_to_pp (pp, simple); |
731 | pp_string (pp, ")"); | |
732 | } | |
733 | } | |
734 | ||
735 | /* Implementation of svalue::accept vfunc for region_svalue. */ | |
736 | ||
737 | void | |
738 | region_svalue::accept (visitor *v) const | |
739 | { | |
808f4dfe | 740 | m_reg->accept (v); |
e6c3bb37 | 741 | v->visit_region_svalue (this); |
808f4dfe DM |
742 | } |
743 | ||
be6c485b DM |
744 | /* Implementation of svalue::implicitly_live_p vfunc for region_svalue. */ |
745 | ||
746 | bool | |
e0139b2a | 747 | region_svalue::implicitly_live_p (const svalue_set *, |
be6c485b DM |
748 | const region_model *model) const |
749 | { | |
750 | /* Pointers into clusters that have escaped should be treated as live. */ | |
751 | const region *base_reg = get_pointee ()->get_base_region (); | |
752 | const store *store = model->get_store (); | |
753 | if (const binding_cluster *c = store->get_cluster (base_reg)) | |
754 | if (c->escaped_p ()) | |
755 | return true; | |
756 | ||
757 | return false; | |
758 | } | |
759 | ||
808f4dfe DM |
760 | /* Evaluate the condition LHS OP RHS. |
761 | Subroutine of region_model::eval_condition for when we have a pair of | |
762 | pointers. */ | |
763 | ||
764 | tristate | |
765 | region_svalue::eval_condition (const region_svalue *lhs, | |
766 | enum tree_code op, | |
767 | const region_svalue *rhs) | |
768 | { | |
769 | /* See if they point to the same region. */ | |
770 | const region *lhs_reg = lhs->get_pointee (); | |
771 | const region *rhs_reg = rhs->get_pointee (); | |
772 | bool ptr_equality = lhs_reg == rhs_reg; | |
773 | switch (op) | |
774 | { | |
775 | default: | |
776 | gcc_unreachable (); | |
777 | ||
778 | case EQ_EXPR: | |
779 | if (ptr_equality) | |
780 | return tristate::TS_TRUE; | |
781 | else | |
782 | return tristate::TS_FALSE; | |
783 | break; | |
784 | ||
785 | case NE_EXPR: | |
786 | if (ptr_equality) | |
787 | return tristate::TS_FALSE; | |
788 | else | |
789 | return tristate::TS_TRUE; | |
790 | break; | |
791 | ||
792 | case GE_EXPR: | |
793 | case LE_EXPR: | |
794 | if (ptr_equality) | |
795 | return tristate::TS_TRUE; | |
796 | break; | |
797 | ||
798 | case GT_EXPR: | |
799 | case LT_EXPR: | |
800 | if (ptr_equality) | |
801 | return tristate::TS_FALSE; | |
802 | break; | |
803 | } | |
804 | ||
805 | return tristate::TS_UNKNOWN; | |
806 | } | |
807 | ||
808 | /* class constant_svalue : public svalue. */ | |
809 | ||
810 | /* Implementation of svalue::dump_to_pp vfunc for constant_svalue. */ | |
811 | ||
812 | void | |
813 | constant_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
814 | { | |
815 | if (simple) | |
816 | { | |
817 | pp_string (pp, "("); | |
818 | dump_tree (pp, get_type ()); | |
819 | pp_string (pp, ")"); | |
820 | dump_tree (pp, m_cst_expr); | |
821 | } | |
822 | else | |
823 | { | |
824 | pp_string (pp, "constant_svalue("); | |
187b213d DM |
825 | if (get_type ()) |
826 | { | |
827 | print_quoted_type (pp, get_type ()); | |
828 | pp_string (pp, ", "); | |
829 | } | |
808f4dfe DM |
830 | dump_tree (pp, m_cst_expr); |
831 | pp_string (pp, ")"); | |
832 | } | |
833 | } | |
834 | ||
835 | /* Implementation of svalue::accept vfunc for constant_svalue. */ | |
836 | ||
837 | void | |
838 | constant_svalue::accept (visitor *v) const | |
839 | { | |
840 | v->visit_constant_svalue (this); | |
841 | } | |
842 | ||
843 | /* Implementation of svalue::implicitly_live_p vfunc for constant_svalue. | |
844 | Constants are implicitly live. */ | |
845 | ||
846 | bool | |
e0139b2a | 847 | constant_svalue::implicitly_live_p (const svalue_set *, |
808f4dfe DM |
848 | const region_model *) const |
849 | { | |
850 | return true; | |
851 | } | |
852 | ||
853 | /* Evaluate the condition LHS OP RHS. | |
854 | Subroutine of region_model::eval_condition for when we have a pair of | |
855 | constants. */ | |
856 | ||
857 | tristate | |
858 | constant_svalue::eval_condition (const constant_svalue *lhs, | |
859 | enum tree_code op, | |
860 | const constant_svalue *rhs) | |
861 | { | |
862 | tree lhs_const = lhs->get_constant (); | |
863 | tree rhs_const = rhs->get_constant (); | |
864 | ||
865 | gcc_assert (CONSTANT_CLASS_P (lhs_const)); | |
866 | gcc_assert (CONSTANT_CLASS_P (rhs_const)); | |
867 | ||
868 | /* Check for comparable types. */ | |
869 | if (types_compatible_p (TREE_TYPE (lhs_const), TREE_TYPE (rhs_const))) | |
870 | { | |
871 | tree comparison | |
872 | = fold_binary (op, boolean_type_node, lhs_const, rhs_const); | |
873 | if (comparison == boolean_true_node) | |
874 | return tristate (tristate::TS_TRUE); | |
875 | if (comparison == boolean_false_node) | |
876 | return tristate (tristate::TS_FALSE); | |
877 | } | |
878 | return tristate::TS_UNKNOWN; | |
879 | } | |
880 | ||
e61ffa20 DM |
881 | /* Implementation of svalue::maybe_fold_bits_within vfunc |
882 | for constant_svalue. */ | |
883 | ||
884 | const svalue * | |
885 | constant_svalue::maybe_fold_bits_within (tree type, | |
f09b9955 | 886 | const bit_range &bits, |
e61ffa20 DM |
887 | region_model_manager *mgr) const |
888 | { | |
889 | /* Bits within an all-zero value are also all zero. */ | |
890 | if (zerop (m_cst_expr)) | |
891 | { | |
892 | if (type) | |
893 | return mgr->get_or_create_cast (type, this); | |
894 | else | |
895 | return this; | |
896 | } | |
f09b9955 DM |
897 | |
898 | /* Handle the case of extracting a single bit. */ | |
899 | if (bits.m_size_in_bits == 1 | |
900 | && TREE_CODE (m_cst_expr) == INTEGER_CST | |
901 | && type | |
99da5233 DM |
902 | && INTEGRAL_TYPE_P (type) |
903 | && tree_fits_uhwi_p (m_cst_expr)) | |
f09b9955 DM |
904 | { |
905 | unsigned HOST_WIDE_INT bit = bits.m_start_bit_offset.to_uhwi (); | |
906 | unsigned HOST_WIDE_INT mask = (1 << bit); | |
907 | unsigned HOST_WIDE_INT val_as_hwi = tree_to_uhwi (m_cst_expr); | |
908 | unsigned HOST_WIDE_INT masked_val = val_as_hwi & mask; | |
909 | int result = masked_val ? 1 : 0; | |
910 | return mgr->get_or_create_int_cst (type, result); | |
911 | } | |
912 | ||
e61ffa20 DM |
913 | /* Otherwise, don't fold. */ |
914 | return NULL; | |
915 | } | |
916 | ||
48e8a7a6 DM |
917 | /* Implementation of svalue::all_zeroes_p for constant_svalue. */ |
918 | ||
919 | bool | |
920 | constant_svalue::all_zeroes_p () const | |
921 | { | |
922 | return zerop (m_cst_expr); | |
923 | } | |
924 | ||
808f4dfe DM |
925 | /* class unknown_svalue : public svalue. */ |
926 | ||
927 | /* Implementation of svalue::dump_to_pp vfunc for unknown_svalue. */ | |
928 | ||
929 | void | |
930 | unknown_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
931 | { | |
932 | if (simple) | |
933 | { | |
934 | pp_string (pp, "UNKNOWN("); | |
935 | if (get_type ()) | |
936 | dump_tree (pp, get_type ()); | |
937 | pp_character (pp, ')'); | |
938 | } | |
939 | else | |
940 | { | |
941 | pp_string (pp, "unknown_svalue("); | |
942 | if (get_type ()) | |
943 | dump_tree (pp, get_type ()); | |
944 | pp_character (pp, ')'); | |
945 | } | |
946 | } | |
947 | ||
948 | /* Implementation of svalue::accept vfunc for unknown_svalue. */ | |
949 | ||
950 | void | |
951 | unknown_svalue::accept (visitor *v) const | |
952 | { | |
953 | v->visit_unknown_svalue (this); | |
954 | } | |
955 | ||
e61ffa20 DM |
956 | /* Implementation of svalue::maybe_fold_bits_within vfunc |
957 | for unknown_svalue. */ | |
958 | ||
959 | const svalue * | |
960 | unknown_svalue::maybe_fold_bits_within (tree type, | |
961 | const bit_range &, | |
962 | region_model_manager *mgr) const | |
963 | { | |
964 | /* Bits within an unknown_svalue are themselves unknown. */ | |
965 | return mgr->get_or_create_unknown_svalue (type); | |
966 | } | |
967 | ||
808f4dfe DM |
968 | /* Get a string for KIND for use in debug dumps. */ |
969 | ||
970 | const char * | |
971 | poison_kind_to_str (enum poison_kind kind) | |
972 | { | |
973 | switch (kind) | |
974 | { | |
975 | default: | |
976 | gcc_unreachable (); | |
33255ad3 DM |
977 | case POISON_KIND_UNINIT: |
978 | return "uninit"; | |
808f4dfe DM |
979 | case POISON_KIND_FREED: |
980 | return "freed"; | |
e7b26744 | 981 | case POISON_KIND_DELETED: |
982 | return "deleted"; | |
808f4dfe DM |
983 | case POISON_KIND_POPPED_STACK: |
984 | return "popped stack"; | |
985 | } | |
986 | } | |
987 | ||
988 | /* class poisoned_svalue : public svalue. */ | |
989 | ||
990 | /* Implementation of svalue::dump_to_pp vfunc for poisoned_svalue. */ | |
991 | ||
992 | void | |
993 | poisoned_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
994 | { | |
995 | if (simple) | |
e84fe25f DM |
996 | { |
997 | pp_string (pp, "POISONED("); | |
998 | print_quoted_type (pp, get_type ()); | |
999 | pp_printf (pp, ", %s)", poison_kind_to_str (m_kind)); | |
1000 | } | |
808f4dfe | 1001 | else |
e84fe25f DM |
1002 | { |
1003 | pp_string (pp, "poisoned_svalue("); | |
1004 | print_quoted_type (pp, get_type ()); | |
1005 | pp_printf (pp, ", %s)", poison_kind_to_str (m_kind)); | |
1006 | } | |
808f4dfe DM |
1007 | } |
1008 | ||
1009 | /* Implementation of svalue::accept vfunc for poisoned_svalue. */ | |
1010 | ||
1011 | void | |
1012 | poisoned_svalue::accept (visitor *v) const | |
1013 | { | |
1014 | v->visit_poisoned_svalue (this); | |
1015 | } | |
1016 | ||
33255ad3 DM |
1017 | /* Implementation of svalue::maybe_fold_bits_within vfunc |
1018 | for poisoned_svalue. */ | |
1019 | ||
1020 | const svalue * | |
1021 | poisoned_svalue::maybe_fold_bits_within (tree type, | |
1022 | const bit_range &, | |
1023 | region_model_manager *mgr) const | |
1024 | { | |
1025 | /* Bits within a poisoned value are also poisoned. */ | |
1026 | return mgr->get_or_create_poisoned_svalue (m_kind, type); | |
1027 | } | |
1028 | ||
808f4dfe DM |
1029 | /* class setjmp_svalue's implementation is in engine.cc, so that it can use |
1030 | the declaration of exploded_node. */ | |
1031 | ||
1032 | /* class initial_svalue : public svalue. */ | |
1033 | ||
1034 | /* Implementation of svalue::dump_to_pp vfunc for initial_svalue. */ | |
1035 | ||
1036 | void | |
1037 | initial_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1038 | { | |
1039 | if (simple) | |
1040 | { | |
1041 | pp_string (pp, "INIT_VAL("); | |
1042 | m_reg->dump_to_pp (pp, simple); | |
1043 | pp_string (pp, ")"); | |
1044 | } | |
1045 | else | |
1046 | { | |
1047 | pp_string (pp, "initial_svalue("); | |
187b213d DM |
1048 | if (get_type ()) |
1049 | { | |
1050 | print_quoted_type (pp, get_type ()); | |
1051 | pp_string (pp, ", "); | |
1052 | } | |
808f4dfe DM |
1053 | m_reg->dump_to_pp (pp, simple); |
1054 | pp_string (pp, ")"); | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | /* Implementation of svalue::accept vfunc for initial_svalue. */ | |
1059 | ||
1060 | void | |
1061 | initial_svalue::accept (visitor *v) const | |
1062 | { | |
808f4dfe | 1063 | m_reg->accept (v); |
e6c3bb37 | 1064 | v->visit_initial_svalue (this); |
808f4dfe DM |
1065 | } |
1066 | ||
1067 | /* Implementation of svalue::implicitly_live_p vfunc for initial_svalue. */ | |
1068 | ||
1069 | bool | |
e0139b2a | 1070 | initial_svalue::implicitly_live_p (const svalue_set *, |
808f4dfe DM |
1071 | const region_model *model) const |
1072 | { | |
1073 | /* This svalue may be implicitly live if the region still implicitly | |
1074 | has its initial value and is reachable. */ | |
1075 | ||
1076 | /* It must be a region that exists; we don't want to consider | |
1077 | INIT_VAL(R) as still being implicitly reachable if R is in | |
1078 | a popped stack frame. */ | |
1079 | if (model->region_exists_p (m_reg)) | |
1080 | { | |
9faf8348 | 1081 | const svalue *reg_sval = model->get_store_value (m_reg, NULL); |
808f4dfe DM |
1082 | if (reg_sval == this) |
1083 | return true; | |
1084 | } | |
1085 | ||
e0139b2a DM |
1086 | /* Assume that the initial values of params for the top level frame |
1087 | are still live, because (presumably) they're still | |
1088 | live in the external caller. */ | |
1089 | if (initial_value_of_param_p ()) | |
1090 | if (const frame_region *frame_reg = m_reg->maybe_get_frame_region ()) | |
1091 | if (frame_reg->get_calling_frame () == NULL) | |
1092 | return true; | |
1093 | ||
1094 | return false; | |
1095 | } | |
1096 | ||
1097 | /* Return true if this is the initial value of a function parameter. */ | |
1098 | ||
1099 | bool | |
1100 | initial_svalue::initial_value_of_param_p () const | |
1101 | { | |
1102 | if (tree reg_decl = m_reg->maybe_get_decl ()) | |
1103 | if (TREE_CODE (reg_decl) == SSA_NAME) | |
1104 | { | |
1105 | tree ssa_name = reg_decl; | |
1106 | if (SSA_NAME_IS_DEFAULT_DEF (ssa_name) | |
1107 | && SSA_NAME_VAR (ssa_name) | |
1108 | && TREE_CODE (SSA_NAME_VAR (ssa_name)) == PARM_DECL) | |
1109 | return true; | |
1110 | } | |
808f4dfe DM |
1111 | return false; |
1112 | } | |
1113 | ||
1114 | /* class unaryop_svalue : public svalue. */ | |
1115 | ||
1116 | /* Implementation of svalue::dump_to_pp vfunc for unaryop_svalue. */ | |
1117 | ||
1118 | void | |
1119 | unaryop_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1120 | { | |
1121 | if (simple) | |
1122 | { | |
ecdb9322 | 1123 | if (m_op == VIEW_CONVERT_EXPR || m_op == NOP_EXPR) |
808f4dfe DM |
1124 | { |
1125 | pp_string (pp, "CAST("); | |
1126 | dump_tree (pp, get_type ()); | |
1127 | pp_string (pp, ", "); | |
1128 | m_arg->dump_to_pp (pp, simple); | |
1129 | pp_character (pp, ')'); | |
1130 | } | |
1131 | else | |
1132 | { | |
1133 | pp_character (pp, '('); | |
1134 | pp_string (pp, get_tree_code_name (m_op)); | |
1135 | //pp_string (pp, op_symbol_code (m_op)); | |
1136 | m_arg->dump_to_pp (pp, simple); | |
1137 | pp_character (pp, ')'); | |
1138 | } | |
1139 | } | |
1140 | else | |
1141 | { | |
1142 | pp_string (pp, "unaryop_svalue ("); | |
1143 | pp_string (pp, get_tree_code_name (m_op)); | |
1144 | pp_string (pp, ", "); | |
1145 | m_arg->dump_to_pp (pp, simple); | |
1146 | pp_character (pp, ')'); | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | /* Implementation of svalue::accept vfunc for unaryop_svalue. */ | |
1151 | ||
1152 | void | |
1153 | unaryop_svalue::accept (visitor *v) const | |
1154 | { | |
808f4dfe | 1155 | m_arg->accept (v); |
e6c3bb37 | 1156 | v->visit_unaryop_svalue (this); |
808f4dfe DM |
1157 | } |
1158 | ||
1159 | /* Implementation of svalue::implicitly_live_p vfunc for unaryop_svalue. */ | |
1160 | ||
1161 | bool | |
e0139b2a | 1162 | unaryop_svalue::implicitly_live_p (const svalue_set *live_svalues, |
808f4dfe DM |
1163 | const region_model *model) const |
1164 | { | |
1165 | return get_arg ()->live_p (live_svalues, model); | |
1166 | } | |
1167 | ||
e61ffa20 DM |
1168 | /* Implementation of svalue::maybe_fold_bits_within vfunc |
1169 | for unaryop_svalue. */ | |
1170 | ||
1171 | const svalue * | |
1172 | unaryop_svalue::maybe_fold_bits_within (tree type, | |
1173 | const bit_range &, | |
1174 | region_model_manager *mgr) const | |
1175 | { | |
1176 | switch (m_op) | |
1177 | { | |
1178 | default: | |
1179 | break; | |
1180 | case NOP_EXPR: | |
1181 | /* A cast of zero is zero. */ | |
1182 | if (tree cst = m_arg->maybe_get_constant ()) | |
1183 | if (zerop (cst)) | |
1184 | { | |
1185 | if (type) | |
1186 | return mgr->get_or_create_cast (type, this); | |
1187 | else | |
1188 | return this; | |
1189 | } | |
1190 | break; | |
1191 | } | |
1192 | /* Otherwise, don't fold. */ | |
1193 | return NULL; | |
1194 | } | |
1195 | ||
808f4dfe DM |
1196 | /* class binop_svalue : public svalue. */ |
1197 | ||
dcdf6bb2 DM |
1198 | /* Return whether OP be printed as an infix operator. */ |
1199 | ||
1200 | static bool | |
1201 | infix_p (enum tree_code op) | |
1202 | { | |
1203 | switch (op) | |
1204 | { | |
1205 | default: | |
1206 | return true; | |
1207 | case MAX_EXPR: | |
1208 | case MIN_EXPR: | |
1209 | return false; | |
1210 | } | |
1211 | } | |
1212 | ||
808f4dfe DM |
1213 | /* Implementation of svalue::dump_to_pp vfunc for binop_svalue. */ |
1214 | ||
1215 | void | |
1216 | binop_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1217 | { | |
1218 | if (simple) | |
1219 | { | |
dcdf6bb2 DM |
1220 | if (infix_p (m_op)) |
1221 | { | |
1222 | /* Print "(A OP B)". */ | |
1223 | pp_character (pp, '('); | |
1224 | m_arg0->dump_to_pp (pp, simple); | |
1225 | pp_string (pp, op_symbol_code (m_op)); | |
1226 | m_arg1->dump_to_pp (pp, simple); | |
1227 | pp_character (pp, ')'); | |
1228 | } | |
1229 | else | |
1230 | { | |
1231 | /* Print "OP(A, B)". */ | |
1232 | pp_string (pp, op_symbol_code (m_op)); | |
1233 | pp_character (pp, '('); | |
1234 | m_arg0->dump_to_pp (pp, simple); | |
1235 | pp_string (pp, ", "); | |
1236 | m_arg1->dump_to_pp (pp, simple); | |
1237 | pp_character (pp, ')'); | |
1238 | } | |
808f4dfe DM |
1239 | } |
1240 | else | |
1241 | { | |
1242 | pp_string (pp, "binop_svalue ("); | |
1243 | pp_string (pp, get_tree_code_name (m_op)); | |
1244 | pp_string (pp, ", "); | |
1245 | m_arg0->dump_to_pp (pp, simple); | |
1246 | pp_string (pp, ", "); | |
1247 | m_arg1->dump_to_pp (pp, simple); | |
1248 | pp_character (pp, ')'); | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | /* Implementation of svalue::accept vfunc for binop_svalue. */ | |
1253 | ||
1254 | void | |
1255 | binop_svalue::accept (visitor *v) const | |
1256 | { | |
808f4dfe DM |
1257 | m_arg0->accept (v); |
1258 | m_arg1->accept (v); | |
e6c3bb37 | 1259 | v->visit_binop_svalue (this); |
808f4dfe DM |
1260 | } |
1261 | ||
1262 | /* Implementation of svalue::implicitly_live_p vfunc for binop_svalue. */ | |
1263 | ||
1264 | bool | |
e0139b2a | 1265 | binop_svalue::implicitly_live_p (const svalue_set *live_svalues, |
808f4dfe DM |
1266 | const region_model *model) const |
1267 | { | |
1268 | return (get_arg0 ()->live_p (live_svalues, model) | |
1269 | && get_arg1 ()->live_p (live_svalues, model)); | |
1270 | } | |
1271 | ||
1272 | /* class sub_svalue : public svalue. */ | |
1273 | ||
1274 | /* sub_svalue'c ctor. */ | |
1275 | ||
9d804f9b DM |
1276 | sub_svalue::sub_svalue (symbol::id_t id, |
1277 | tree type, const svalue *parent_svalue, | |
808f4dfe DM |
1278 | const region *subregion) |
1279 | : svalue (complexity::from_pair (parent_svalue->get_complexity (), | |
1280 | subregion->get_complexity ()), | |
9d804f9b | 1281 | id, |
808f4dfe DM |
1282 | type), |
1283 | m_parent_svalue (parent_svalue), m_subregion (subregion) | |
1284 | { | |
a113b143 | 1285 | gcc_assert (parent_svalue->can_have_associated_state_p ()); |
808f4dfe DM |
1286 | } |
1287 | ||
1288 | /* Implementation of svalue::dump_to_pp vfunc for sub_svalue. */ | |
1289 | ||
1290 | void | |
1291 | sub_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1292 | { | |
1293 | if (simple) | |
1294 | { | |
1295 | pp_string (pp, "SUB("); | |
1296 | m_parent_svalue->dump_to_pp (pp, simple); | |
1297 | pp_string (pp, ", "); | |
1298 | m_subregion->dump_to_pp (pp, simple); | |
1299 | pp_character (pp, ')'); | |
1300 | } | |
1301 | else | |
1302 | { | |
1303 | pp_string (pp, "sub_svalue ("); | |
1304 | pp_string (pp, ", "); | |
1305 | m_parent_svalue->dump_to_pp (pp, simple); | |
1306 | pp_string (pp, ", "); | |
1307 | m_subregion->dump_to_pp (pp, simple); | |
1308 | pp_character (pp, ')'); | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | /* Implementation of svalue::accept vfunc for sub_svalue. */ | |
1313 | ||
1314 | void | |
1315 | sub_svalue::accept (visitor *v) const | |
1316 | { | |
808f4dfe DM |
1317 | m_parent_svalue->accept (v); |
1318 | m_subregion->accept (v); | |
e6c3bb37 | 1319 | v->visit_sub_svalue (this); |
808f4dfe DM |
1320 | } |
1321 | ||
1322 | /* Implementation of svalue::implicitly_live_p vfunc for sub_svalue. */ | |
1323 | ||
1324 | bool | |
e0139b2a | 1325 | sub_svalue::implicitly_live_p (const svalue_set *live_svalues, |
808f4dfe DM |
1326 | const region_model *model) const |
1327 | { | |
1328 | return get_parent ()->live_p (live_svalues, model); | |
1329 | } | |
1330 | ||
e61ffa20 DM |
1331 | /* class repeated_svalue : public svalue. */ |
1332 | ||
1333 | /* repeated_svalue'c ctor. */ | |
1334 | ||
9d804f9b DM |
1335 | repeated_svalue::repeated_svalue (symbol::id_t id, |
1336 | tree type, | |
e61ffa20 DM |
1337 | const svalue *outer_size, |
1338 | const svalue *inner_svalue) | |
9d804f9b | 1339 | : svalue (complexity::from_pair (outer_size, inner_svalue), id, type), |
e61ffa20 DM |
1340 | m_outer_size (outer_size), |
1341 | m_inner_svalue (inner_svalue) | |
1342 | { | |
a113b143 DM |
1343 | gcc_assert (outer_size->can_have_associated_state_p ()); |
1344 | gcc_assert (inner_svalue->can_have_associated_state_p ()); | |
e61ffa20 DM |
1345 | } |
1346 | ||
1347 | /* Implementation of svalue::dump_to_pp vfunc for repeated_svalue. */ | |
1348 | ||
1349 | void | |
1350 | repeated_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1351 | { | |
1352 | if (simple) | |
1353 | { | |
1354 | pp_string (pp, "REPEATED("); | |
1355 | if (get_type ()) | |
1356 | { | |
1357 | print_quoted_type (pp, get_type ()); | |
1358 | pp_string (pp, ", "); | |
1359 | } | |
1360 | pp_string (pp, "outer_size: "); | |
1361 | m_outer_size->dump_to_pp (pp, simple); | |
1362 | pp_string (pp, ", inner_val: "); | |
1363 | m_inner_svalue->dump_to_pp (pp, simple); | |
1364 | pp_character (pp, ')'); | |
1365 | } | |
1366 | else | |
1367 | { | |
1368 | pp_string (pp, "repeated_svalue ("); | |
1369 | if (get_type ()) | |
1370 | { | |
1371 | print_quoted_type (pp, get_type ()); | |
1372 | pp_string (pp, ", "); | |
1373 | } | |
1374 | pp_string (pp, "outer_size: "); | |
1375 | m_outer_size->dump_to_pp (pp, simple); | |
1376 | pp_string (pp, ", inner_val: "); | |
1377 | m_inner_svalue->dump_to_pp (pp, simple); | |
1378 | pp_character (pp, ')'); | |
1379 | } | |
1380 | } | |
1381 | ||
1382 | /* Implementation of svalue::accept vfunc for repeated_svalue. */ | |
1383 | ||
1384 | void | |
1385 | repeated_svalue::accept (visitor *v) const | |
1386 | { | |
e61ffa20 | 1387 | m_inner_svalue->accept (v); |
e6c3bb37 | 1388 | v->visit_repeated_svalue (this); |
e61ffa20 DM |
1389 | } |
1390 | ||
48e8a7a6 | 1391 | /* Implementation of svalue::all_zeroes_p for repeated_svalue. */ |
e61ffa20 DM |
1392 | |
1393 | bool | |
1394 | repeated_svalue::all_zeroes_p () const | |
1395 | { | |
48e8a7a6 | 1396 | return m_inner_svalue->all_zeroes_p (); |
e61ffa20 DM |
1397 | } |
1398 | ||
1399 | /* Implementation of svalue::maybe_fold_bits_within vfunc | |
1400 | for repeated_svalue. */ | |
1401 | ||
1402 | const svalue * | |
1403 | repeated_svalue::maybe_fold_bits_within (tree type, | |
1404 | const bit_range &bits, | |
1405 | region_model_manager *mgr) const | |
1406 | { | |
1407 | const svalue *innermost_sval = m_inner_svalue; | |
1408 | /* Fold | |
1409 | BITS_WITHIN (range, REPEATED_SVALUE (ZERO)) | |
1410 | to: | |
1411 | REPEATED_SVALUE (ZERO). */ | |
1412 | if (all_zeroes_p ()) | |
1413 | { | |
1414 | byte_range bytes (0,0); | |
1415 | if (bits.as_byte_range (&bytes)) | |
1416 | { | |
1417 | const svalue *byte_size | |
1418 | = mgr->get_or_create_int_cst (size_type_node, | |
1419 | bytes.m_size_in_bytes.to_uhwi ()); | |
1420 | return mgr->get_or_create_repeated_svalue (type, byte_size, | |
1421 | innermost_sval); | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | /* Fold: | |
1426 | BITS_WITHIN (range, REPEATED_SVALUE (INNERMOST_SVALUE)) | |
1427 | to: | |
1428 | BITS_WITHIN (range - offset, INNERMOST_SVALUE) | |
1429 | if range is fully within one instance of INNERMOST_SVALUE. */ | |
1430 | if (tree innermost_type = innermost_sval->get_type ()) | |
1431 | { | |
1432 | bit_size_t element_bit_size; | |
1433 | if (int_size_in_bits (innermost_type, &element_bit_size) | |
1434 | && element_bit_size > 0) | |
1435 | { | |
1436 | HOST_WIDE_INT start_idx | |
1437 | = (bits.get_start_bit_offset () | |
1438 | / element_bit_size).to_shwi (); | |
1439 | HOST_WIDE_INT last_idx | |
1440 | = (bits.get_last_bit_offset () | |
1441 | / element_bit_size).to_shwi (); | |
1442 | if (start_idx == last_idx) | |
1443 | { | |
1444 | bit_offset_t start_of_element | |
1445 | = start_idx * element_bit_size; | |
1446 | bit_range range_within_element | |
1447 | (bits.m_start_bit_offset - start_of_element, | |
1448 | bits.m_size_in_bits); | |
1449 | return mgr->get_or_create_bits_within (type, | |
1450 | range_within_element, | |
1451 | innermost_sval); | |
1452 | } | |
1453 | } | |
1454 | } | |
1455 | ||
1456 | return NULL; | |
1457 | } | |
1458 | ||
1459 | /* class bits_within_svalue : public svalue. */ | |
1460 | ||
1461 | /* bits_within_svalue'c ctor. */ | |
1462 | ||
9d804f9b DM |
1463 | bits_within_svalue::bits_within_svalue (symbol::id_t id, |
1464 | tree type, | |
e61ffa20 DM |
1465 | const bit_range &bits, |
1466 | const svalue *inner_svalue) | |
9d804f9b | 1467 | : svalue (complexity (inner_svalue), id, type), |
e61ffa20 DM |
1468 | m_bits (bits), |
1469 | m_inner_svalue (inner_svalue) | |
1470 | { | |
a113b143 | 1471 | gcc_assert (inner_svalue->can_have_associated_state_p ()); |
e61ffa20 DM |
1472 | } |
1473 | ||
1474 | /* Implementation of svalue::dump_to_pp vfunc for bits_within_svalue. */ | |
1475 | ||
1476 | void | |
1477 | bits_within_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1478 | { | |
1479 | if (simple) | |
1480 | { | |
1481 | pp_string (pp, "BITS_WITHIN("); | |
1482 | if (get_type ()) | |
1483 | { | |
1484 | print_quoted_type (pp, get_type ()); | |
1485 | pp_string (pp, ", "); | |
1486 | } | |
1487 | m_bits.dump_to_pp (pp); | |
1488 | pp_string (pp, ", inner_val: "); | |
1489 | m_inner_svalue->dump_to_pp (pp, simple); | |
1490 | pp_character (pp, ')'); | |
1491 | } | |
1492 | else | |
1493 | { | |
1494 | pp_string (pp, "bits_within_svalue ("); | |
1495 | if (get_type ()) | |
1496 | { | |
1497 | print_quoted_type (pp, get_type ()); | |
1498 | pp_string (pp, ", "); | |
1499 | } | |
1500 | m_bits.dump_to_pp (pp); | |
1501 | pp_string (pp, ", inner_val: "); | |
1502 | m_inner_svalue->dump_to_pp (pp, simple); | |
1503 | pp_character (pp, ')'); | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | /* Implementation of svalue::maybe_fold_bits_within vfunc | |
1508 | for bits_within_svalue. */ | |
1509 | ||
1510 | const svalue * | |
1511 | bits_within_svalue::maybe_fold_bits_within (tree type, | |
1512 | const bit_range &bits, | |
1513 | region_model_manager *mgr) const | |
1514 | { | |
1515 | /* Fold: | |
1516 | BITS_WITHIN (range1, BITS_WITHIN (range2, VAL)) | |
1517 | to: | |
1518 | BITS_WITHIN (range1 in range 2, VAL). */ | |
1519 | bit_range offset_bits (m_bits.get_start_bit_offset () | |
1520 | + bits.m_start_bit_offset, | |
1521 | bits.m_size_in_bits); | |
1522 | return mgr->get_or_create_bits_within (type, offset_bits, m_inner_svalue); | |
1523 | } | |
1524 | ||
1525 | /* Implementation of svalue::accept vfunc for bits_within_svalue. */ | |
1526 | ||
1527 | void | |
1528 | bits_within_svalue::accept (visitor *v) const | |
1529 | { | |
e61ffa20 | 1530 | m_inner_svalue->accept (v); |
e6c3bb37 | 1531 | v->visit_bits_within_svalue (this); |
e61ffa20 DM |
1532 | } |
1533 | ||
1534 | /* Implementation of svalue::implicitly_live_p vfunc for bits_within_svalue. */ | |
1535 | ||
1536 | bool | |
1537 | bits_within_svalue::implicitly_live_p (const svalue_set *live_svalues, | |
1538 | const region_model *model) const | |
1539 | { | |
1540 | return m_inner_svalue->live_p (live_svalues, model); | |
1541 | } | |
1542 | ||
808f4dfe DM |
1543 | /* class widening_svalue : public svalue. */ |
1544 | ||
1545 | /* Implementation of svalue::dump_to_pp vfunc for widening_svalue. */ | |
1546 | ||
1547 | void | |
1548 | widening_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1549 | { | |
1550 | if (simple) | |
1551 | { | |
1552 | pp_string (pp, "WIDENING("); | |
1553 | pp_character (pp, '{'); | |
1554 | m_point.print (pp, format (false)); | |
1555 | pp_string (pp, "}, "); | |
1556 | m_base_sval->dump_to_pp (pp, simple); | |
1557 | pp_string (pp, ", "); | |
1558 | m_iter_sval->dump_to_pp (pp, simple); | |
1559 | pp_character (pp, ')'); | |
1560 | } | |
1561 | else | |
1562 | { | |
1563 | pp_string (pp, "widening_svalue ("); | |
1564 | pp_string (pp, ", "); | |
1565 | pp_character (pp, '{'); | |
1566 | m_point.print (pp, format (false)); | |
1567 | pp_string (pp, "}, "); | |
1568 | m_base_sval->dump_to_pp (pp, simple); | |
1569 | pp_string (pp, ", "); | |
1570 | m_iter_sval->dump_to_pp (pp, simple); | |
1571 | pp_character (pp, ')'); | |
1572 | } | |
1573 | } | |
1574 | ||
1575 | /* Implementation of svalue::accept vfunc for widening_svalue. */ | |
1576 | ||
1577 | void | |
1578 | widening_svalue::accept (visitor *v) const | |
1579 | { | |
808f4dfe DM |
1580 | m_base_sval->accept (v); |
1581 | m_iter_sval->accept (v); | |
e6c3bb37 | 1582 | v->visit_widening_svalue (this); |
808f4dfe DM |
1583 | } |
1584 | ||
1585 | /* Attempt to determine in which direction this value is changing | |
1586 | w.r.t. the initial value. */ | |
1587 | ||
1588 | enum widening_svalue::direction_t | |
1589 | widening_svalue::get_direction () const | |
1590 | { | |
1591 | tree base_cst = m_base_sval->maybe_get_constant (); | |
1592 | if (base_cst == NULL_TREE) | |
1593 | return DIR_UNKNOWN; | |
1594 | tree iter_cst = m_iter_sval->maybe_get_constant (); | |
1595 | if (iter_cst == NULL_TREE) | |
1596 | return DIR_UNKNOWN; | |
1597 | ||
1598 | tree iter_gt_base = fold_binary (GT_EXPR, boolean_type_node, | |
1599 | iter_cst, base_cst); | |
1600 | if (iter_gt_base == boolean_true_node) | |
1601 | return DIR_ASCENDING; | |
1602 | ||
1603 | tree iter_lt_base = fold_binary (LT_EXPR, boolean_type_node, | |
1604 | iter_cst, base_cst); | |
1605 | if (iter_lt_base == boolean_true_node) | |
1606 | return DIR_DESCENDING; | |
1607 | ||
1608 | return DIR_UNKNOWN; | |
1609 | } | |
1610 | ||
1611 | /* Compare this value against constant RHS_CST. */ | |
1612 | ||
1613 | tristate | |
1614 | widening_svalue::eval_condition_without_cm (enum tree_code op, | |
1615 | tree rhs_cst) const | |
1616 | { | |
1617 | tree base_cst = m_base_sval->maybe_get_constant (); | |
1618 | if (base_cst == NULL_TREE) | |
1619 | return tristate::TS_UNKNOWN; | |
1620 | tree iter_cst = m_iter_sval->maybe_get_constant (); | |
1621 | if (iter_cst == NULL_TREE) | |
1622 | return tristate::TS_UNKNOWN; | |
1623 | ||
1624 | switch (get_direction ()) | |
1625 | { | |
1626 | default: | |
1627 | gcc_unreachable (); | |
1628 | case DIR_ASCENDING: | |
1629 | /* LHS is in [base_cst, +ve infinity), assuming no overflow. */ | |
1630 | switch (op) | |
1631 | { | |
1632 | case LE_EXPR: | |
1633 | case LT_EXPR: | |
1634 | { | |
1635 | /* [BASE, +INF) OP RHS: | |
1636 | This is either true or false at +ve ininity, | |
1637 | It can be true for points X where X OP RHS, so we have either | |
1638 | "false", or "unknown". */ | |
1639 | tree base_op_rhs = fold_binary (op, boolean_type_node, | |
1640 | base_cst, rhs_cst); | |
1641 | if (base_op_rhs == boolean_true_node) | |
1642 | return tristate::TS_UNKNOWN; | |
1643 | else | |
1644 | return tristate::TS_FALSE; | |
1645 | } | |
1646 | ||
1647 | case GE_EXPR: | |
1648 | case GT_EXPR: | |
1649 | { | |
1650 | /* [BASE, +INF) OP RHS: | |
1651 | This is true at +ve infinity. It will be true everywhere | |
1652 | in the range if BASE >= RHS. */ | |
1653 | tree base_op_rhs = fold_binary (op, boolean_type_node, | |
1654 | base_cst, rhs_cst); | |
1655 | if (base_op_rhs == boolean_true_node) | |
1656 | return tristate::TS_TRUE; | |
1657 | else | |
1658 | return tristate::TS_UNKNOWN; | |
1659 | } | |
1660 | ||
1661 | case EQ_EXPR: | |
1662 | { | |
1663 | /* [BASE, +INF) == RHS: | |
1664 | Could this be true at any point in the range? If so we | |
1665 | have "unknown", otherwise we have "false". */ | |
1666 | tree base_le_rhs = fold_binary (LE_EXPR, boolean_type_node, | |
1667 | base_cst, rhs_cst); | |
1668 | if (base_le_rhs == boolean_true_node) | |
1669 | return tristate::TS_UNKNOWN; | |
1670 | else | |
1671 | return tristate::TS_FALSE; | |
1672 | } | |
1673 | ||
1674 | case NE_EXPR: | |
1675 | { | |
1676 | /* [BASE, +INF) != RHS: | |
1677 | Could we have equality at any point in the range? If so we | |
1678 | have "unknown", otherwise we have "true". */ | |
1679 | tree base_le_rhs = fold_binary (LE_EXPR, boolean_type_node, | |
1680 | base_cst, rhs_cst); | |
1681 | if (base_le_rhs == boolean_true_node) | |
1682 | return tristate::TS_UNKNOWN; | |
1683 | else | |
1684 | return tristate::TS_TRUE; | |
1685 | } | |
1686 | ||
1687 | default: | |
1688 | return tristate::TS_UNKNOWN; | |
1689 | } | |
1690 | ||
1691 | case DIR_DESCENDING: | |
1692 | /* LHS is in (-ve infinity, base_cst], assuming no overflow. */ | |
1693 | return tristate::TS_UNKNOWN; | |
1694 | ||
1695 | case DIR_UNKNOWN: | |
1696 | return tristate::TS_UNKNOWN; | |
1697 | } | |
1698 | } | |
1699 | ||
1700 | /* class placeholder_svalue : public svalue. */ | |
1701 | ||
1702 | /* Implementation of svalue::dump_to_pp vfunc for placeholder_svalue. */ | |
1703 | ||
1704 | void | |
1705 | placeholder_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1706 | { | |
1707 | if (simple) | |
1708 | pp_printf (pp, "PLACEHOLDER(%qs)", m_name); | |
1709 | else | |
1710 | pp_printf (pp, "placeholder_svalue (%qs)", m_name); | |
1711 | } | |
1712 | ||
1713 | /* Implementation of svalue::accept vfunc for placeholder_svalue. */ | |
1714 | ||
1715 | void | |
1716 | placeholder_svalue::accept (visitor *v) const | |
1717 | { | |
1718 | v->visit_placeholder_svalue (this); | |
1719 | } | |
1720 | ||
1721 | /* class unmergeable_svalue : public svalue. */ | |
1722 | ||
1723 | /* Implementation of svalue::dump_to_pp vfunc for unmergeable_svalue. */ | |
1724 | ||
1725 | void | |
1726 | unmergeable_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1727 | { | |
1728 | if (simple) | |
1729 | { | |
1730 | pp_string (pp, "UNMERGEABLE("); | |
1731 | m_arg->dump_to_pp (pp, simple); | |
1732 | pp_character (pp, ')'); | |
1733 | } | |
1734 | else | |
1735 | { | |
1736 | pp_string (pp, "unmergeable_svalue ("); | |
1737 | m_arg->dump_to_pp (pp, simple); | |
1738 | pp_character (pp, ')'); | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | /* Implementation of svalue::accept vfunc for unmergeable_svalue. */ | |
1743 | ||
1744 | void | |
1745 | unmergeable_svalue::accept (visitor *v) const | |
1746 | { | |
808f4dfe | 1747 | m_arg->accept (v); |
e6c3bb37 | 1748 | v->visit_unmergeable_svalue (this); |
808f4dfe DM |
1749 | } |
1750 | ||
1751 | /* Implementation of svalue::implicitly_live_p vfunc for unmergeable_svalue. */ | |
1752 | ||
1753 | bool | |
e0139b2a | 1754 | unmergeable_svalue::implicitly_live_p (const svalue_set *live_svalues, |
808f4dfe DM |
1755 | const region_model *model) const |
1756 | { | |
1757 | return get_arg ()->live_p (live_svalues, model); | |
1758 | } | |
1759 | ||
1760 | /* class compound_svalue : public svalue. */ | |
1761 | ||
9d804f9b DM |
1762 | compound_svalue::compound_svalue (symbol::id_t id, |
1763 | tree type, | |
1764 | const binding_map &map) | |
1765 | : svalue (calc_complexity (map), id, type), m_map (map) | |
d88c8df7 | 1766 | { |
d88c8df7 DM |
1767 | #if CHECKING_P |
1768 | for (iterator_t iter = begin (); iter != end (); ++iter) | |
1769 | { | |
bfca9505 DM |
1770 | /* All keys within the underlying binding_map are required to be concrete, |
1771 | not symbolic. */ | |
d88c8df7 DM |
1772 | const binding_key *key = (*iter).first; |
1773 | gcc_assert (key->concrete_p ()); | |
bfca9505 DM |
1774 | |
1775 | /* We don't nest compound svalues. */ | |
1776 | const svalue *sval = (*iter).second; | |
1777 | gcc_assert (sval->get_kind () != SK_COMPOUND); | |
d88c8df7 DM |
1778 | } |
1779 | #endif | |
1780 | } | |
1781 | ||
808f4dfe DM |
1782 | /* Implementation of svalue::dump_to_pp vfunc for compound_svalue. */ |
1783 | ||
1784 | void | |
1785 | compound_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1786 | { | |
1787 | if (simple) | |
1788 | { | |
1789 | pp_string (pp, "COMPOUND("); | |
e84fe25f DM |
1790 | if (get_type ()) |
1791 | { | |
1792 | print_quoted_type (pp, get_type ()); | |
1793 | pp_string (pp, ", "); | |
1794 | } | |
1795 | pp_character (pp, '{'); | |
808f4dfe | 1796 | m_map.dump_to_pp (pp, simple, false); |
e84fe25f | 1797 | pp_string (pp, "})"); |
808f4dfe DM |
1798 | } |
1799 | else | |
1800 | { | |
1801 | pp_string (pp, "compound_svalue ("); | |
e84fe25f DM |
1802 | if (get_type ()) |
1803 | { | |
1804 | print_quoted_type (pp, get_type ()); | |
1805 | pp_string (pp, ", "); | |
1806 | } | |
808f4dfe DM |
1807 | pp_character (pp, '{'); |
1808 | m_map.dump_to_pp (pp, simple, false); | |
e84fe25f | 1809 | pp_string (pp, "})"); |
808f4dfe DM |
1810 | } |
1811 | } | |
1812 | ||
1813 | /* Implementation of svalue::accept vfunc for compound_svalue. */ | |
1814 | ||
1815 | void | |
1816 | compound_svalue::accept (visitor *v) const | |
1817 | { | |
808f4dfe DM |
1818 | for (binding_map::iterator_t iter = m_map.begin (); |
1819 | iter != m_map.end (); ++iter) | |
1820 | { | |
1821 | //(*iter).first.accept (v); | |
1822 | (*iter).second->accept (v); | |
1823 | } | |
e6c3bb37 | 1824 | v->visit_compound_svalue (this); |
808f4dfe DM |
1825 | } |
1826 | ||
1827 | /* Calculate what the complexity of a compound_svalue instance for MAP | |
1828 | will be, based on the svalues bound within MAP. */ | |
1829 | ||
1830 | complexity | |
1831 | compound_svalue::calc_complexity (const binding_map &map) | |
1832 | { | |
1833 | unsigned num_child_nodes = 0; | |
1834 | unsigned max_child_depth = 0; | |
1835 | for (binding_map::iterator_t iter = map.begin (); | |
1836 | iter != map.end (); ++iter) | |
1837 | { | |
1838 | const complexity &sval_c = (*iter).second->get_complexity (); | |
1839 | num_child_nodes += sval_c.m_num_nodes; | |
1840 | max_child_depth = MAX (max_child_depth, sval_c.m_max_depth); | |
1841 | } | |
1842 | return complexity (num_child_nodes + 1, max_child_depth + 1); | |
1843 | } | |
1844 | ||
e61ffa20 DM |
1845 | /* Implementation of svalue::maybe_fold_bits_within vfunc |
1846 | for compound_svalue. */ | |
1847 | ||
1848 | const svalue * | |
1849 | compound_svalue::maybe_fold_bits_within (tree type, | |
1850 | const bit_range &bits, | |
1851 | region_model_manager *mgr) const | |
1852 | { | |
1853 | binding_map result_map; | |
1854 | for (auto iter : m_map) | |
1855 | { | |
1856 | const binding_key *key = iter.first; | |
1857 | if (const concrete_binding *conc_key | |
1858 | = key->dyn_cast_concrete_binding ()) | |
1859 | { | |
1860 | /* Ignore concrete bindings outside BITS. */ | |
1861 | if (!conc_key->get_bit_range ().intersects_p (bits)) | |
1862 | continue; | |
1863 | ||
1864 | const svalue *sval = iter.second; | |
1865 | /* Get the position of conc_key relative to BITS. */ | |
1866 | bit_range result_location (conc_key->get_start_bit_offset () | |
1867 | - bits.get_start_bit_offset (), | |
1868 | conc_key->get_size_in_bits ()); | |
1869 | /* If conc_key starts after BITS, trim off leading bits | |
1870 | from the svalue and adjust binding location. */ | |
1871 | if (result_location.m_start_bit_offset < 0) | |
1872 | { | |
1873 | bit_size_t leading_bits_to_drop | |
1874 | = -result_location.m_start_bit_offset; | |
1875 | result_location = bit_range | |
1876 | (0, result_location.m_size_in_bits - leading_bits_to_drop); | |
1877 | bit_range bits_within_sval (leading_bits_to_drop, | |
1878 | result_location.m_size_in_bits); | |
1879 | /* Trim off leading bits from iter_sval. */ | |
1880 | sval = mgr->get_or_create_bits_within (NULL_TREE, | |
1881 | bits_within_sval, | |
1882 | sval); | |
1883 | } | |
1884 | /* If conc_key finishes after BITS, trim off trailing bits | |
1885 | from the svalue and adjust binding location. */ | |
1886 | if (conc_key->get_next_bit_offset () | |
1887 | > bits.get_next_bit_offset ()) | |
1888 | { | |
1889 | bit_size_t trailing_bits_to_drop | |
1890 | = (conc_key->get_next_bit_offset () | |
1891 | - bits.get_next_bit_offset ()); | |
1892 | result_location = bit_range | |
1893 | (result_location.m_start_bit_offset, | |
1894 | result_location.m_size_in_bits - trailing_bits_to_drop); | |
1895 | bit_range bits_within_sval (0, | |
1896 | result_location.m_size_in_bits); | |
1897 | /* Trim off leading bits from iter_sval. */ | |
1898 | sval = mgr->get_or_create_bits_within (NULL_TREE, | |
1899 | bits_within_sval, | |
1900 | sval); | |
1901 | } | |
1902 | const concrete_binding *offset_conc_key | |
1903 | = mgr->get_store_manager ()->get_concrete_binding | |
1904 | (result_location); | |
1905 | result_map.put (offset_conc_key, sval); | |
1906 | } | |
1907 | else | |
1908 | /* If we have any symbolic keys we can't get it as bits. */ | |
1909 | return NULL; | |
1910 | } | |
1911 | return mgr->get_or_create_compound_svalue (type, result_map); | |
1912 | } | |
1913 | ||
808f4dfe DM |
1914 | /* class conjured_svalue : public svalue. */ |
1915 | ||
1916 | /* Implementation of svalue::dump_to_pp vfunc for conjured_svalue. */ | |
1917 | ||
1918 | void | |
1919 | conjured_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1920 | { | |
1921 | if (simple) | |
1922 | { | |
1923 | pp_string (pp, "CONJURED("); | |
1924 | pp_gimple_stmt_1 (pp, m_stmt, 0, (dump_flags_t)0); | |
1925 | pp_string (pp, ", "); | |
1926 | m_id_reg->dump_to_pp (pp, simple); | |
1927 | pp_character (pp, ')'); | |
1928 | } | |
1929 | else | |
1930 | { | |
1931 | pp_string (pp, "conjured_svalue ("); | |
187b213d DM |
1932 | if (get_type ()) |
1933 | { | |
1934 | print_quoted_type (pp, get_type ()); | |
1935 | pp_string (pp, ", "); | |
1936 | } | |
808f4dfe DM |
1937 | pp_gimple_stmt_1 (pp, m_stmt, 0, (dump_flags_t)0); |
1938 | pp_string (pp, ", "); | |
1939 | m_id_reg->dump_to_pp (pp, simple); | |
1940 | pp_character (pp, ')'); | |
1941 | } | |
1942 | } | |
1943 | ||
1944 | /* Implementation of svalue::accept vfunc for conjured_svalue. */ | |
1945 | ||
1946 | void | |
1947 | conjured_svalue::accept (visitor *v) const | |
1948 | { | |
808f4dfe | 1949 | m_id_reg->accept (v); |
e6c3bb37 | 1950 | v->visit_conjured_svalue (this); |
808f4dfe DM |
1951 | } |
1952 | ||
021077b9 DM |
1953 | /* Return true iff this conjured_svalue is for the LHS of the |
1954 | stmt that conjured it. */ | |
1955 | ||
1956 | bool | |
1957 | conjured_svalue::lhs_value_p () const | |
1958 | { | |
1959 | if (tree decl = m_id_reg->maybe_get_decl ()) | |
1960 | return decl == gimple_get_lhs (m_stmt); | |
1961 | return false; | |
1962 | } | |
1963 | ||
ded2c2c0 DM |
1964 | /* class asm_output_svalue : public svalue. */ |
1965 | ||
1966 | /* Implementation of svalue::dump_to_pp vfunc for asm_output_svalue. */ | |
1967 | ||
1968 | void | |
1969 | asm_output_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
1970 | { | |
1971 | if (simple) | |
1972 | { | |
1973 | pp_printf (pp, "ASM_OUTPUT(%qs, %%%i, {", | |
1974 | get_asm_string (), | |
1975 | get_output_idx ()); | |
1976 | for (unsigned i = 0; i < m_num_inputs; i++) | |
1977 | { | |
1978 | if (i > 0) | |
1979 | pp_string (pp, ", "); | |
1980 | dump_input (pp, 0, m_input_arr[i], simple); | |
1981 | } | |
1982 | pp_string (pp, "})"); | |
1983 | } | |
1984 | else | |
1985 | { | |
1986 | pp_printf (pp, "asm_output_svalue (%qs, %%%i, {", | |
1987 | get_asm_string (), | |
1988 | get_output_idx ()); | |
1989 | for (unsigned i = 0; i < m_num_inputs; i++) | |
1990 | { | |
1991 | if (i > 0) | |
1992 | pp_string (pp, ", "); | |
1993 | dump_input (pp, 0, m_input_arr[i], simple); | |
1994 | } | |
1995 | pp_string (pp, "})"); | |
1996 | } | |
1997 | } | |
1998 | ||
1999 | /* Subroutine of asm_output_svalue::dump_to_pp. */ | |
2000 | ||
2001 | void | |
2002 | asm_output_svalue::dump_input (pretty_printer *pp, | |
2003 | unsigned input_idx, | |
2004 | const svalue *sval, | |
2005 | bool simple) const | |
2006 | { | |
2007 | pp_printf (pp, "%%%i: ", input_idx_to_asm_idx (input_idx)); | |
2008 | sval->dump_to_pp (pp, simple); | |
2009 | } | |
2010 | ||
2011 | /* Convert INPUT_IDX from an index into the array of inputs | |
2012 | into the index of all operands for the asm stmt. */ | |
2013 | ||
2014 | unsigned | |
2015 | asm_output_svalue::input_idx_to_asm_idx (unsigned input_idx) const | |
2016 | { | |
2017 | return input_idx + m_num_outputs; | |
2018 | } | |
2019 | ||
2020 | /* Implementation of svalue::accept vfunc for asm_output_svalue. */ | |
2021 | ||
2022 | void | |
2023 | asm_output_svalue::accept (visitor *v) const | |
2024 | { | |
ded2c2c0 DM |
2025 | for (unsigned i = 0; i < m_num_inputs; i++) |
2026 | m_input_arr[i]->accept (v); | |
e6c3bb37 | 2027 | v->visit_asm_output_svalue (this); |
ded2c2c0 DM |
2028 | } |
2029 | ||
aee1adf2 DM |
2030 | /* class const_fn_result_svalue : public svalue. */ |
2031 | ||
2032 | /* Implementation of svalue::dump_to_pp vfunc for const_fn_result_svalue. */ | |
2033 | ||
2034 | void | |
2035 | const_fn_result_svalue::dump_to_pp (pretty_printer *pp, bool simple) const | |
2036 | { | |
2037 | if (simple) | |
2038 | { | |
2039 | pp_printf (pp, "CONST_FN_RESULT(%qD, {", m_fndecl); | |
2040 | for (unsigned i = 0; i < m_num_inputs; i++) | |
2041 | { | |
2042 | if (i > 0) | |
2043 | pp_string (pp, ", "); | |
2044 | dump_input (pp, i, m_input_arr[i], simple); | |
2045 | } | |
2046 | pp_string (pp, "})"); | |
2047 | } | |
2048 | else | |
2049 | { | |
2050 | pp_printf (pp, "CONST_FN_RESULT(%qD, {", m_fndecl); | |
2051 | for (unsigned i = 0; i < m_num_inputs; i++) | |
2052 | { | |
2053 | if (i > 0) | |
2054 | pp_string (pp, ", "); | |
2055 | dump_input (pp, i, m_input_arr[i], simple); | |
2056 | } | |
2057 | pp_string (pp, "})"); | |
2058 | } | |
2059 | } | |
2060 | ||
2061 | /* Subroutine of const_fn_result_svalue::dump_to_pp. */ | |
2062 | ||
2063 | void | |
2064 | const_fn_result_svalue::dump_input (pretty_printer *pp, | |
2065 | unsigned input_idx, | |
2066 | const svalue *sval, | |
2067 | bool simple) const | |
2068 | { | |
2069 | pp_printf (pp, "arg%i: ", input_idx); | |
2070 | sval->dump_to_pp (pp, simple); | |
2071 | } | |
2072 | ||
2073 | /* Implementation of svalue::accept vfunc for const_fn_result_svalue. */ | |
2074 | ||
2075 | void | |
2076 | const_fn_result_svalue::accept (visitor *v) const | |
2077 | { | |
aee1adf2 DM |
2078 | for (unsigned i = 0; i < m_num_inputs; i++) |
2079 | m_input_arr[i]->accept (v); | |
e6c3bb37 | 2080 | v->visit_const_fn_result_svalue (this); |
aee1adf2 DM |
2081 | } |
2082 | ||
808f4dfe DM |
2083 | } // namespace ana |
2084 | ||
2085 | #endif /* #if ENABLE_ANALYZER */ |