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3916d6d8 | 1 | /* Support routines for the various generation passes. |
cbe34bb5 | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
c88c0d42 | 3 | |
1322177d | 4 | This file is part of GCC. |
c88c0d42 | 5 | |
1322177d LB |
6 | GCC is free software; you can redistribute it and/or modify it |
7 | under the terms of the GNU General Public License as published by | |
9dcd6f09 | 8 | the Free Software Foundation; either version 3, or (at your option) |
c88c0d42 CP |
9 | any later version. |
10 | ||
1322177d LB |
11 | GCC is distributed in the hope that it will be useful, but WITHOUT |
12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
14 | License for more details. | |
c88c0d42 CP |
15 | |
16 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
c88c0d42 | 19 | |
4977bab6 | 20 | #include "bconfig.h" |
c88c0d42 | 21 | #include "system.h" |
4977bab6 ZW |
22 | #include "coretypes.h" |
23 | #include "tm.h" | |
c88c0d42 | 24 | #include "rtl.h" |
3916d6d8 | 25 | #include "obstack.h" |
c88c0d42 | 26 | #include "errors.h" |
10692477 | 27 | #include "read-md.h" |
c88c0d42 | 28 | #include "gensupport.h" |
6b8068d6 | 29 | #include "vec.h" |
c88c0d42 | 30 | |
477c104e MK |
31 | #define MAX_OPERANDS 40 |
32 | ||
33 | static rtx operand_data[MAX_OPERANDS]; | |
34 | static rtx match_operand_entries_in_pattern[MAX_OPERANDS]; | |
35 | static char used_operands_numbers[MAX_OPERANDS]; | |
36 | ||
3916d6d8 | 37 | |
c8cf201f RK |
38 | /* In case some macros used by files we include need it, define this here. */ |
39 | int target_flags; | |
40 | ||
2199e5fa ZW |
41 | int insn_elision = 1; |
42 | ||
3916d6d8 RH |
43 | static struct obstack obstack; |
44 | struct obstack *rtl_obstack = &obstack; | |
45 | ||
72a35f93 RS |
46 | /* Counter for named patterns and INSN_CODEs. */ |
47 | static int insn_sequence_num; | |
48 | ||
49 | /* Counter for define_splits. */ | |
50 | static int split_sequence_num; | |
51 | ||
52 | /* Counter for define_peephole2s. */ | |
53 | static int peephole2_sequence_num; | |
3262c1f5 RH |
54 | |
55 | static int predicable_default; | |
56 | static const char *predicable_true; | |
57 | static const char *predicable_false; | |
58 | ||
477c104e MK |
59 | static const char *subst_true = "yes"; |
60 | static const char *subst_false = "no"; | |
61 | ||
2199e5fa ZW |
62 | static htab_t condition_table; |
63 | ||
477c104e MK |
64 | /* We initially queue all patterns, process the define_insn, |
65 | define_cond_exec and define_subst patterns, then return | |
66 | them one at a time. */ | |
c88c0d42 | 67 | |
3262c1f5 RH |
68 | struct queue_elem |
69 | { | |
70 | rtx data; | |
cc472607 | 71 | file_location loc; |
3262c1f5 | 72 | struct queue_elem *next; |
a406f566 MM |
73 | /* In a DEFINE_INSN that came from a DEFINE_INSN_AND_SPLIT, SPLIT |
74 | points to the generated DEFINE_SPLIT. */ | |
75 | struct queue_elem *split; | |
c88c0d42 CP |
76 | }; |
77 | ||
64aad689 AK |
78 | #define MNEMONIC_ATTR_NAME "mnemonic" |
79 | #define MNEMONIC_HTAB_SIZE 1024 | |
80 | ||
3262c1f5 RH |
81 | static struct queue_elem *define_attr_queue; |
82 | static struct queue_elem **define_attr_tail = &define_attr_queue; | |
e543e219 ZW |
83 | static struct queue_elem *define_pred_queue; |
84 | static struct queue_elem **define_pred_tail = &define_pred_queue; | |
3262c1f5 RH |
85 | static struct queue_elem *define_insn_queue; |
86 | static struct queue_elem **define_insn_tail = &define_insn_queue; | |
87 | static struct queue_elem *define_cond_exec_queue; | |
88 | static struct queue_elem **define_cond_exec_tail = &define_cond_exec_queue; | |
477c104e MK |
89 | static struct queue_elem *define_subst_queue; |
90 | static struct queue_elem **define_subst_tail = &define_subst_queue; | |
3262c1f5 RH |
91 | static struct queue_elem *other_queue; |
92 | static struct queue_elem **other_tail = &other_queue; | |
477c104e MK |
93 | static struct queue_elem *define_subst_attr_queue; |
94 | static struct queue_elem **define_subst_attr_tail = &define_subst_attr_queue; | |
c88c0d42 | 95 | |
58d745ec RS |
96 | /* Mapping from DEFINE_* rtxes to their location in the source file. */ |
97 | static hash_map <rtx, file_location> *rtx_locs; | |
98 | ||
3d7aafde | 99 | static void remove_constraints (rtx); |
3d7aafde AJ |
100 | |
101 | static int is_predicable (struct queue_elem *); | |
102 | static void identify_predicable_attribute (void); | |
103 | static int n_alternatives (const char *); | |
104 | static void collect_insn_data (rtx, int *, int *); | |
3d7aafde AJ |
105 | static const char *alter_test_for_insn (struct queue_elem *, |
106 | struct queue_elem *); | |
107 | static char *shift_output_template (char *, const char *, int); | |
108 | static const char *alter_output_for_insn (struct queue_elem *, | |
109 | struct queue_elem *, | |
110 | int, int); | |
111 | static void process_one_cond_exec (struct queue_elem *); | |
112 | static void process_define_cond_exec (void); | |
e543e219 | 113 | static void init_predicate_table (void); |
0458fe77 | 114 | static void record_insn_name (int, const char *); |
477c104e MK |
115 | |
116 | static bool has_subst_attribute (struct queue_elem *, struct queue_elem *); | |
477c104e MK |
117 | static const char * alter_output_for_subst_insn (rtx, int); |
118 | static void alter_attrs_for_subst_insn (struct queue_elem *, int); | |
119 | static void process_substs_on_one_elem (struct queue_elem *, | |
120 | struct queue_elem *); | |
121 | static rtx subst_dup (rtx, int, int); | |
122 | static void process_define_subst (void); | |
123 | ||
124 | static const char * duplicate_alternatives (const char *, int); | |
125 | static const char * duplicate_each_alternative (const char * str, int n_dup); | |
126 | ||
127 | typedef const char * (*constraints_handler_t) (const char *, int); | |
128 | static rtx alter_constraints (rtx, int, constraints_handler_t); | |
a7ba15ca | 129 | static rtx adjust_operands_numbers (rtx); |
477c104e | 130 | static rtx replace_duplicating_operands_in_pattern (rtx); |
3916d6d8 | 131 | \f |
10b76d73 RK |
132 | /* Make a version of gen_rtx_CONST_INT so that GEN_INT can be used in |
133 | the gensupport programs. */ | |
134 | ||
135 | rtx | |
ef4bddc2 | 136 | gen_rtx_CONST_INT (machine_mode ARG_UNUSED (mode), |
3d7aafde | 137 | HOST_WIDE_INT arg) |
10b76d73 RK |
138 | { |
139 | rtx rt = rtx_alloc (CONST_INT); | |
140 | ||
141 | XWINT (rt, 0) = arg; | |
142 | return rt; | |
143 | } | |
313d38e3 RS |
144 | |
145 | /* Return the rtx pattern specified by the list of rtxes in a | |
146 | define_insn or define_split. */ | |
147 | ||
148 | rtx | |
149 | add_implicit_parallel (rtvec vec) | |
150 | { | |
151 | if (GET_NUM_ELEM (vec) == 1) | |
152 | return RTVEC_ELT (vec, 0); | |
153 | else | |
154 | { | |
155 | rtx pattern = rtx_alloc (PARALLEL); | |
156 | XVEC (pattern, 0) = vec; | |
157 | return pattern; | |
158 | } | |
159 | } | |
3916d6d8 | 160 | \f |
77059241 RS |
161 | /* Predicate handling. |
162 | ||
163 | We construct from the machine description a table mapping each | |
164 | predicate to a list of the rtl codes it can possibly match. The | |
165 | function 'maybe_both_true' uses it to deduce that there are no | |
166 | expressions that can be matches by certain pairs of tree nodes. | |
167 | Also, if a predicate can match only one code, we can hardwire that | |
168 | code into the node testing the predicate. | |
169 | ||
170 | Some predicates are flagged as special. validate_pattern will not | |
171 | warn about modeless match_operand expressions if they have a | |
172 | special predicate. Predicates that allow only constants are also | |
173 | treated as special, for this purpose. | |
174 | ||
175 | validate_pattern will warn about predicates that allow non-lvalues | |
176 | when they appear in destination operands. | |
177 | ||
178 | Calculating the set of rtx codes that can possibly be accepted by a | |
179 | predicate expression EXP requires a three-state logic: any given | |
180 | subexpression may definitively accept a code C (Y), definitively | |
181 | reject a code C (N), or may have an indeterminate effect (I). N | |
182 | and I is N; Y or I is Y; Y and I, N or I are both I. Here are full | |
183 | truth tables. | |
184 | ||
185 | a b a&b a|b | |
186 | Y Y Y Y | |
187 | N Y N Y | |
188 | N N N N | |
189 | I Y I Y | |
190 | I N N I | |
191 | I I I I | |
192 | ||
193 | We represent Y with 1, N with 0, I with 2. If any code is left in | |
194 | an I state by the complete expression, we must assume that that | |
195 | code can be accepted. */ | |
196 | ||
197 | #define N 0 | |
198 | #define Y 1 | |
199 | #define I 2 | |
200 | ||
201 | #define TRISTATE_AND(a,b) \ | |
202 | ((a) == I ? ((b) == N ? N : I) : \ | |
203 | (b) == I ? ((a) == N ? N : I) : \ | |
204 | (a) && (b)) | |
205 | ||
206 | #define TRISTATE_OR(a,b) \ | |
207 | ((a) == I ? ((b) == Y ? Y : I) : \ | |
208 | (b) == I ? ((a) == Y ? Y : I) : \ | |
209 | (a) || (b)) | |
210 | ||
211 | #define TRISTATE_NOT(a) \ | |
212 | ((a) == I ? I : !(a)) | |
213 | ||
214 | /* 0 means no warning about that code yet, 1 means warned. */ | |
215 | static char did_you_mean_codes[NUM_RTX_CODE]; | |
216 | ||
217 | /* Recursively calculate the set of rtx codes accepted by the | |
c9f84f2e RS |
218 | predicate expression EXP, writing the result to CODES. LOC is |
219 | the .md file location of the directive containing EXP. */ | |
77059241 | 220 | |
851ee5f4 | 221 | void |
c9f84f2e | 222 | compute_test_codes (rtx exp, file_location loc, char *codes) |
77059241 RS |
223 | { |
224 | char op0_codes[NUM_RTX_CODE]; | |
225 | char op1_codes[NUM_RTX_CODE]; | |
226 | char op2_codes[NUM_RTX_CODE]; | |
227 | int i; | |
228 | ||
229 | switch (GET_CODE (exp)) | |
230 | { | |
231 | case AND: | |
c9f84f2e RS |
232 | compute_test_codes (XEXP (exp, 0), loc, op0_codes); |
233 | compute_test_codes (XEXP (exp, 1), loc, op1_codes); | |
77059241 RS |
234 | for (i = 0; i < NUM_RTX_CODE; i++) |
235 | codes[i] = TRISTATE_AND (op0_codes[i], op1_codes[i]); | |
236 | break; | |
237 | ||
238 | case IOR: | |
c9f84f2e RS |
239 | compute_test_codes (XEXP (exp, 0), loc, op0_codes); |
240 | compute_test_codes (XEXP (exp, 1), loc, op1_codes); | |
77059241 RS |
241 | for (i = 0; i < NUM_RTX_CODE; i++) |
242 | codes[i] = TRISTATE_OR (op0_codes[i], op1_codes[i]); | |
243 | break; | |
244 | case NOT: | |
c9f84f2e | 245 | compute_test_codes (XEXP (exp, 0), loc, op0_codes); |
77059241 RS |
246 | for (i = 0; i < NUM_RTX_CODE; i++) |
247 | codes[i] = TRISTATE_NOT (op0_codes[i]); | |
248 | break; | |
249 | ||
250 | case IF_THEN_ELSE: | |
251 | /* a ? b : c accepts the same codes as (a & b) | (!a & c). */ | |
c9f84f2e RS |
252 | compute_test_codes (XEXP (exp, 0), loc, op0_codes); |
253 | compute_test_codes (XEXP (exp, 1), loc, op1_codes); | |
254 | compute_test_codes (XEXP (exp, 2), loc, op2_codes); | |
77059241 RS |
255 | for (i = 0; i < NUM_RTX_CODE; i++) |
256 | codes[i] = TRISTATE_OR (TRISTATE_AND (op0_codes[i], op1_codes[i]), | |
257 | TRISTATE_AND (TRISTATE_NOT (op0_codes[i]), | |
258 | op2_codes[i])); | |
259 | break; | |
260 | ||
261 | case MATCH_CODE: | |
262 | /* MATCH_CODE allows a specified list of codes. However, if it | |
263 | does not apply to the top level of the expression, it does not | |
264 | constrain the set of codes for the top level. */ | |
265 | if (XSTR (exp, 1)[0] != '\0') | |
266 | { | |
267 | memset (codes, Y, NUM_RTX_CODE); | |
268 | break; | |
269 | } | |
270 | ||
271 | memset (codes, N, NUM_RTX_CODE); | |
272 | { | |
273 | const char *next_code = XSTR (exp, 0); | |
274 | const char *code; | |
275 | ||
276 | if (*next_code == '\0') | |
277 | { | |
c9f84f2e | 278 | error_at (loc, "empty match_code expression"); |
77059241 RS |
279 | break; |
280 | } | |
281 | ||
282 | while ((code = scan_comma_elt (&next_code)) != 0) | |
283 | { | |
284 | size_t n = next_code - code; | |
285 | int found_it = 0; | |
286 | ||
287 | for (i = 0; i < NUM_RTX_CODE; i++) | |
288 | if (!strncmp (code, GET_RTX_NAME (i), n) | |
289 | && GET_RTX_NAME (i)[n] == '\0') | |
290 | { | |
291 | codes[i] = Y; | |
292 | found_it = 1; | |
293 | break; | |
294 | } | |
295 | if (!found_it) | |
296 | { | |
c9f84f2e RS |
297 | error_at (loc, "match_code \"%.*s\" matches nothing", |
298 | (int) n, code); | |
77059241 RS |
299 | for (i = 0; i < NUM_RTX_CODE; i++) |
300 | if (!strncasecmp (code, GET_RTX_NAME (i), n) | |
301 | && GET_RTX_NAME (i)[n] == '\0' | |
302 | && !did_you_mean_codes[i]) | |
303 | { | |
304 | did_you_mean_codes[i] = 1; | |
c9f84f2e RS |
305 | message_at (loc, "(did you mean \"%s\"?)", |
306 | GET_RTX_NAME (i)); | |
77059241 RS |
307 | } |
308 | } | |
309 | } | |
310 | } | |
311 | break; | |
312 | ||
313 | case MATCH_OPERAND: | |
314 | /* MATCH_OPERAND disallows the set of codes that the named predicate | |
315 | disallows, and is indeterminate for the codes that it does allow. */ | |
316 | { | |
317 | struct pred_data *p = lookup_predicate (XSTR (exp, 1)); | |
318 | if (!p) | |
319 | { | |
c9f84f2e RS |
320 | error_at (loc, "reference to unknown predicate '%s'", |
321 | XSTR (exp, 1)); | |
77059241 RS |
322 | break; |
323 | } | |
324 | for (i = 0; i < NUM_RTX_CODE; i++) | |
325 | codes[i] = p->codes[i] ? I : N; | |
326 | } | |
327 | break; | |
328 | ||
329 | ||
330 | case MATCH_TEST: | |
331 | /* (match_test WHATEVER) is completely indeterminate. */ | |
332 | memset (codes, I, NUM_RTX_CODE); | |
333 | break; | |
334 | ||
335 | default: | |
c9f84f2e RS |
336 | error_at (loc, "'%s' cannot be used in predicates or constraints", |
337 | GET_RTX_NAME (GET_CODE (exp))); | |
77059241 RS |
338 | memset (codes, I, NUM_RTX_CODE); |
339 | break; | |
340 | } | |
341 | } | |
342 | ||
343 | #undef TRISTATE_OR | |
344 | #undef TRISTATE_AND | |
345 | #undef TRISTATE_NOT | |
346 | ||
347 | /* Return true if NAME is a valid predicate name. */ | |
348 | ||
349 | static bool | |
350 | valid_predicate_name_p (const char *name) | |
351 | { | |
352 | const char *p; | |
353 | ||
354 | if (!ISALPHA (name[0]) && name[0] != '_') | |
355 | return false; | |
356 | for (p = name + 1; *p; p++) | |
357 | if (!ISALNUM (*p) && *p != '_') | |
358 | return false; | |
359 | return true; | |
360 | } | |
361 | ||
cc472607 RS |
362 | /* Process define_predicate directive DESC, which appears at location LOC. |
363 | Compute the set of codes that can be matched, and record this as a known | |
364 | predicate. */ | |
77059241 RS |
365 | |
366 | static void | |
cc472607 | 367 | process_define_predicate (rtx desc, file_location loc) |
77059241 RS |
368 | { |
369 | struct pred_data *pred; | |
370 | char codes[NUM_RTX_CODE]; | |
371 | int i; | |
372 | ||
373 | if (!valid_predicate_name_p (XSTR (desc, 0))) | |
374 | { | |
cc472607 RS |
375 | error_at (loc, "%s: predicate name must be a valid C function name", |
376 | XSTR (desc, 0)); | |
77059241 RS |
377 | return; |
378 | } | |
379 | ||
380 | pred = XCNEW (struct pred_data); | |
381 | pred->name = XSTR (desc, 0); | |
382 | pred->exp = XEXP (desc, 1); | |
383 | pred->c_block = XSTR (desc, 2); | |
384 | if (GET_CODE (desc) == DEFINE_SPECIAL_PREDICATE) | |
385 | pred->special = true; | |
386 | ||
c9f84f2e | 387 | compute_test_codes (XEXP (desc, 1), loc, codes); |
77059241 RS |
388 | |
389 | for (i = 0; i < NUM_RTX_CODE; i++) | |
390 | if (codes[i] != N) | |
391 | add_predicate_code (pred, (enum rtx_code) i); | |
392 | ||
393 | add_predicate (pred); | |
394 | } | |
395 | #undef I | |
396 | #undef N | |
397 | #undef Y | |
398 | \f | |
a406f566 MM |
399 | /* Queue PATTERN on LIST_TAIL. Return the address of the new queue |
400 | element. */ | |
3262c1f5 | 401 | |
a406f566 | 402 | static struct queue_elem * |
3d7aafde | 403 | queue_pattern (rtx pattern, struct queue_elem ***list_tail, |
cc472607 | 404 | file_location loc) |
3262c1f5 | 405 | { |
c3284718 | 406 | struct queue_elem *e = XNEW (struct queue_elem); |
3262c1f5 | 407 | e->data = pattern; |
cc472607 | 408 | e->loc = loc; |
3262c1f5 | 409 | e->next = NULL; |
a406f566 | 410 | e->split = NULL; |
3262c1f5 RH |
411 | **list_tail = e; |
412 | *list_tail = &e->next; | |
a406f566 | 413 | return e; |
3262c1f5 RH |
414 | } |
415 | ||
477c104e MK |
416 | /* Remove element ELEM from QUEUE. */ |
417 | static void | |
418 | remove_from_queue (struct queue_elem *elem, struct queue_elem **queue) | |
419 | { | |
420 | struct queue_elem *prev, *e; | |
421 | prev = NULL; | |
422 | for (e = *queue; e ; e = e->next) | |
423 | { | |
424 | if (e == elem) | |
425 | break; | |
426 | prev = e; | |
427 | } | |
428 | if (e == NULL) | |
429 | return; | |
430 | ||
431 | if (prev) | |
432 | prev->next = elem->next; | |
433 | else | |
434 | *queue = elem->next; | |
435 | } | |
436 | ||
0bddee8e BS |
437 | /* Build a define_attr for an binary attribute with name NAME and |
438 | possible values "yes" and "no", and queue it. */ | |
439 | static void | |
440 | add_define_attr (const char *name) | |
441 | { | |
c3284718 | 442 | struct queue_elem *e = XNEW (struct queue_elem); |
0bddee8e BS |
443 | rtx t1 = rtx_alloc (DEFINE_ATTR); |
444 | XSTR (t1, 0) = name; | |
445 | XSTR (t1, 1) = "no,yes"; | |
446 | XEXP (t1, 2) = rtx_alloc (CONST_STRING); | |
447 | XSTR (XEXP (t1, 2), 0) = "yes"; | |
448 | e->data = t1; | |
3814e880 | 449 | e->loc = file_location ("built-in", -1, -1); |
0bddee8e BS |
450 | e->next = define_attr_queue; |
451 | define_attr_queue = e; | |
452 | ||
453 | } | |
454 | ||
c88c0d42 CP |
455 | /* Recursively remove constraints from an rtx. */ |
456 | ||
457 | static void | |
3d7aafde | 458 | remove_constraints (rtx part) |
c88c0d42 | 459 | { |
b3694847 SS |
460 | int i, j; |
461 | const char *format_ptr; | |
c88c0d42 CP |
462 | |
463 | if (part == 0) | |
464 | return; | |
465 | ||
466 | if (GET_CODE (part) == MATCH_OPERAND) | |
467 | XSTR (part, 2) = ""; | |
468 | else if (GET_CODE (part) == MATCH_SCRATCH) | |
469 | XSTR (part, 1) = ""; | |
470 | ||
471 | format_ptr = GET_RTX_FORMAT (GET_CODE (part)); | |
472 | ||
473 | for (i = 0; i < GET_RTX_LENGTH (GET_CODE (part)); i++) | |
474 | switch (*format_ptr++) | |
475 | { | |
476 | case 'e': | |
477 | case 'u': | |
478 | remove_constraints (XEXP (part, i)); | |
479 | break; | |
480 | case 'E': | |
481 | if (XVEC (part, i) != NULL) | |
482 | for (j = 0; j < XVECLEN (part, i); j++) | |
483 | remove_constraints (XVECEXP (part, i, j)); | |
484 | break; | |
485 | } | |
486 | } | |
487 | ||
d91edf86 | 488 | /* Process a top level rtx in some way, queuing as appropriate. */ |
c88c0d42 CP |
489 | |
490 | static void | |
cc472607 | 491 | process_rtx (rtx desc, file_location loc) |
3262c1f5 RH |
492 | { |
493 | switch (GET_CODE (desc)) | |
494 | { | |
495 | case DEFINE_INSN: | |
cc472607 | 496 | queue_pattern (desc, &define_insn_tail, loc); |
3262c1f5 RH |
497 | break; |
498 | ||
499 | case DEFINE_COND_EXEC: | |
cc472607 | 500 | queue_pattern (desc, &define_cond_exec_tail, loc); |
3262c1f5 RH |
501 | break; |
502 | ||
477c104e | 503 | case DEFINE_SUBST: |
cc472607 | 504 | queue_pattern (desc, &define_subst_tail, loc); |
477c104e MK |
505 | break; |
506 | ||
507 | case DEFINE_SUBST_ATTR: | |
cc472607 | 508 | queue_pattern (desc, &define_subst_attr_tail, loc); |
477c104e MK |
509 | break; |
510 | ||
3262c1f5 | 511 | case DEFINE_ATTR: |
8f4fe86c | 512 | case DEFINE_ENUM_ATTR: |
cc472607 | 513 | queue_pattern (desc, &define_attr_tail, loc); |
3262c1f5 RH |
514 | break; |
515 | ||
e543e219 ZW |
516 | case DEFINE_PREDICATE: |
517 | case DEFINE_SPECIAL_PREDICATE: | |
cc472607 | 518 | process_define_predicate (desc, loc); |
77059241 RS |
519 | /* Fall through. */ |
520 | ||
f38840db ZW |
521 | case DEFINE_CONSTRAINT: |
522 | case DEFINE_REGISTER_CONSTRAINT: | |
523 | case DEFINE_MEMORY_CONSTRAINT: | |
9eb1ca69 | 524 | case DEFINE_SPECIAL_MEMORY_CONSTRAINT: |
f38840db | 525 | case DEFINE_ADDRESS_CONSTRAINT: |
cc472607 | 526 | queue_pattern (desc, &define_pred_tail, loc); |
e543e219 ZW |
527 | break; |
528 | ||
3262c1f5 RH |
529 | case DEFINE_INSN_AND_SPLIT: |
530 | { | |
531 | const char *split_cond; | |
20217ac1 KG |
532 | rtx split; |
533 | rtvec attr; | |
de4bfbcb | 534 | int i; |
a406f566 MM |
535 | struct queue_elem *insn_elem; |
536 | struct queue_elem *split_elem; | |
3262c1f5 | 537 | |
dc297297 | 538 | /* Create a split with values from the insn_and_split. */ |
3262c1f5 | 539 | split = rtx_alloc (DEFINE_SPLIT); |
de4bfbcb RH |
540 | |
541 | i = XVECLEN (desc, 1); | |
fbd40359 | 542 | XVEC (split, 0) = rtvec_alloc (i); |
de4bfbcb RH |
543 | while (--i >= 0) |
544 | { | |
545 | XVECEXP (split, 0, i) = copy_rtx (XVECEXP (desc, 1, i)); | |
546 | remove_constraints (XVECEXP (split, 0, i)); | |
547 | } | |
3262c1f5 RH |
548 | |
549 | /* If the split condition starts with "&&", append it to the | |
550 | insn condition to create the new split condition. */ | |
551 | split_cond = XSTR (desc, 4); | |
552 | if (split_cond[0] == '&' && split_cond[1] == '&') | |
7445392c | 553 | { |
b78027d1 DM |
554 | rtx_reader_ptr->copy_md_ptr_loc (split_cond + 2, split_cond); |
555 | split_cond = rtx_reader_ptr->join_c_conditions (XSTR (desc, 2), | |
556 | split_cond + 2); | |
7445392c | 557 | } |
3262c1f5 RH |
558 | XSTR (split, 1) = split_cond; |
559 | XVEC (split, 2) = XVEC (desc, 5); | |
560 | XSTR (split, 3) = XSTR (desc, 6); | |
561 | ||
562 | /* Fix up the DEFINE_INSN. */ | |
ee138cf8 | 563 | attr = XVEC (desc, 7); |
3262c1f5 | 564 | PUT_CODE (desc, DEFINE_INSN); |
ee138cf8 | 565 | XVEC (desc, 4) = attr; |
3262c1f5 RH |
566 | |
567 | /* Queue them. */ | |
cc472607 RS |
568 | insn_elem = queue_pattern (desc, &define_insn_tail, loc); |
569 | split_elem = queue_pattern (split, &other_tail, loc); | |
a406f566 | 570 | insn_elem->split = split_elem; |
3262c1f5 RH |
571 | break; |
572 | } | |
573 | ||
574 | default: | |
cc472607 | 575 | queue_pattern (desc, &other_tail, loc); |
3262c1f5 | 576 | break; |
c88c0d42 CP |
577 | } |
578 | } | |
3916d6d8 | 579 | \f |
3262c1f5 RH |
580 | /* Return true if attribute PREDICABLE is true for ELEM, which holds |
581 | a DEFINE_INSN. */ | |
582 | ||
583 | static int | |
3d7aafde | 584 | is_predicable (struct queue_elem *elem) |
3262c1f5 RH |
585 | { |
586 | rtvec vec = XVEC (elem->data, 4); | |
587 | const char *value; | |
588 | int i; | |
589 | ||
590 | if (! vec) | |
591 | return predicable_default; | |
592 | ||
593 | for (i = GET_NUM_ELEM (vec) - 1; i >= 0; --i) | |
594 | { | |
595 | rtx sub = RTVEC_ELT (vec, i); | |
596 | switch (GET_CODE (sub)) | |
597 | { | |
598 | case SET_ATTR: | |
599 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
600 | { | |
601 | value = XSTR (sub, 1); | |
602 | goto found; | |
603 | } | |
604 | break; | |
605 | ||
606 | case SET_ATTR_ALTERNATIVE: | |
607 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
608 | { | |
cc472607 | 609 | error_at (elem->loc, "multiple alternatives for `predicable'"); |
3262c1f5 RH |
610 | return 0; |
611 | } | |
612 | break; | |
613 | ||
614 | case SET: | |
615 | if (GET_CODE (SET_DEST (sub)) != ATTR | |
616 | || strcmp (XSTR (SET_DEST (sub), 0), "predicable") != 0) | |
617 | break; | |
618 | sub = SET_SRC (sub); | |
619 | if (GET_CODE (sub) == CONST_STRING) | |
620 | { | |
621 | value = XSTR (sub, 0); | |
622 | goto found; | |
623 | } | |
624 | ||
625 | /* ??? It would be possible to handle this if we really tried. | |
626 | It's not easy though, and I'm not going to bother until it | |
627 | really proves necessary. */ | |
cc472607 | 628 | error_at (elem->loc, "non-constant value for `predicable'"); |
3262c1f5 RH |
629 | return 0; |
630 | ||
631 | default: | |
b2d59f6f | 632 | gcc_unreachable (); |
3262c1f5 RH |
633 | } |
634 | } | |
635 | ||
636 | return predicable_default; | |
637 | ||
638 | found: | |
0bddee8e BS |
639 | /* Find out which value we're looking at. Multiple alternatives means at |
640 | least one is predicable. */ | |
3262c1f5 | 641 | if (strchr (value, ',') != NULL) |
0bddee8e | 642 | return 1; |
3262c1f5 RH |
643 | if (strcmp (value, predicable_true) == 0) |
644 | return 1; | |
645 | if (strcmp (value, predicable_false) == 0) | |
646 | return 0; | |
647 | ||
cc472607 | 648 | error_at (elem->loc, "unknown value `%s' for `predicable' attribute", value); |
3262c1f5 RH |
649 | return 0; |
650 | } | |
651 | ||
477c104e MK |
652 | /* Find attribute SUBST in ELEM and assign NEW_VALUE to it. */ |
653 | static void | |
654 | change_subst_attribute (struct queue_elem *elem, | |
655 | struct queue_elem *subst_elem, | |
656 | const char *new_value) | |
657 | { | |
658 | rtvec attrs_vec = XVEC (elem->data, 4); | |
659 | const char *subst_name = XSTR (subst_elem->data, 0); | |
660 | int i; | |
661 | ||
662 | if (! attrs_vec) | |
663 | return; | |
664 | ||
665 | for (i = GET_NUM_ELEM (attrs_vec) - 1; i >= 0; --i) | |
666 | { | |
667 | rtx cur_attr = RTVEC_ELT (attrs_vec, i); | |
668 | if (GET_CODE (cur_attr) != SET_ATTR) | |
669 | continue; | |
670 | if (strcmp (XSTR (cur_attr, 0), subst_name) == 0) | |
671 | { | |
672 | XSTR (cur_attr, 1) = new_value; | |
673 | return; | |
674 | } | |
675 | } | |
676 | } | |
677 | ||
678 | /* Return true if ELEM has the attribute with the name of DEFINE_SUBST | |
679 | represented by SUBST_ELEM and this attribute has value SUBST_TRUE. | |
680 | DEFINE_SUBST isn't applied to patterns without such attribute. In other | |
681 | words, we suppose the default value of the attribute to be 'no' since it is | |
682 | always generated automaticaly in read-rtl.c. */ | |
683 | static bool | |
684 | has_subst_attribute (struct queue_elem *elem, struct queue_elem *subst_elem) | |
685 | { | |
686 | rtvec attrs_vec = XVEC (elem->data, 4); | |
687 | const char *value, *subst_name = XSTR (subst_elem->data, 0); | |
688 | int i; | |
689 | ||
690 | if (! attrs_vec) | |
691 | return false; | |
692 | ||
693 | for (i = GET_NUM_ELEM (attrs_vec) - 1; i >= 0; --i) | |
694 | { | |
695 | rtx cur_attr = RTVEC_ELT (attrs_vec, i); | |
696 | switch (GET_CODE (cur_attr)) | |
697 | { | |
698 | case SET_ATTR: | |
699 | if (strcmp (XSTR (cur_attr, 0), subst_name) == 0) | |
700 | { | |
701 | value = XSTR (cur_attr, 1); | |
702 | goto found; | |
703 | } | |
704 | break; | |
705 | ||
706 | case SET: | |
707 | if (GET_CODE (SET_DEST (cur_attr)) != ATTR | |
708 | || strcmp (XSTR (SET_DEST (cur_attr), 0), subst_name) != 0) | |
709 | break; | |
710 | cur_attr = SET_SRC (cur_attr); | |
711 | if (GET_CODE (cur_attr) == CONST_STRING) | |
712 | { | |
713 | value = XSTR (cur_attr, 0); | |
714 | goto found; | |
715 | } | |
716 | ||
717 | /* Only (set_attr "subst" "yes/no") and | |
718 | (set (attr "subst" (const_string "yes/no"))) | |
719 | are currently allowed. */ | |
cc472607 | 720 | error_at (elem->loc, "unsupported value for `%s'", subst_name); |
477c104e MK |
721 | return false; |
722 | ||
723 | case SET_ATTR_ALTERNATIVE: | |
cc472607 RS |
724 | error_at (elem->loc, |
725 | "%s: `set_attr_alternative' is unsupported by " | |
726 | "`define_subst'", XSTR (elem->data, 0)); | |
477c104e MK |
727 | return false; |
728 | ||
729 | ||
730 | default: | |
731 | gcc_unreachable (); | |
732 | } | |
733 | } | |
734 | ||
735 | return false; | |
736 | ||
737 | found: | |
738 | if (strcmp (value, subst_true) == 0) | |
739 | return true; | |
740 | if (strcmp (value, subst_false) == 0) | |
741 | return false; | |
742 | ||
cc472607 RS |
743 | error_at (elem->loc, "unknown value `%s' for `%s' attribute", |
744 | value, subst_name); | |
477c104e MK |
745 | return false; |
746 | } | |
747 | ||
748 | /* Compare RTL-template of original define_insn X to input RTL-template of | |
749 | define_subst PT. Return 1 if the templates match, 0 otherwise. | |
750 | During the comparison, the routine also fills global_array OPERAND_DATA. */ | |
751 | static bool | |
cc472607 | 752 | subst_pattern_match (rtx x, rtx pt, file_location loc) |
477c104e MK |
753 | { |
754 | RTX_CODE code, code_pt; | |
755 | int i, j, len; | |
756 | const char *fmt, *pred_name; | |
757 | ||
758 | code = GET_CODE (x); | |
759 | code_pt = GET_CODE (pt); | |
760 | ||
761 | if (code_pt == MATCH_OPERAND) | |
762 | { | |
763 | /* MATCH_DUP, and MATCH_OP_DUP don't have a specified mode, so we | |
764 | always accept them. */ | |
765 | if (GET_MODE (pt) != VOIDmode && GET_MODE (x) != GET_MODE (pt) | |
766 | && (code != MATCH_DUP && code != MATCH_OP_DUP)) | |
767 | return false; /* Modes don't match. */ | |
768 | ||
769 | if (code == MATCH_OPERAND) | |
770 | { | |
771 | pred_name = XSTR (pt, 1); | |
772 | if (pred_name[0] != 0) | |
773 | { | |
774 | const struct pred_data *pred_pt = lookup_predicate (pred_name); | |
775 | if (!pred_pt || pred_pt != lookup_predicate (XSTR (x, 1))) | |
776 | return false; /* Predicates don't match. */ | |
777 | } | |
778 | } | |
779 | ||
780 | gcc_assert (XINT (pt, 0) >= 0 && XINT (pt, 0) < MAX_OPERANDS); | |
781 | operand_data[XINT (pt, 0)] = x; | |
782 | return true; | |
783 | } | |
784 | ||
785 | if (code_pt == MATCH_OPERATOR) | |
786 | { | |
787 | int x_vecexp_pos = -1; | |
788 | ||
789 | /* Compare modes. */ | |
790 | if (GET_MODE (pt) != VOIDmode && GET_MODE (x) != GET_MODE (pt)) | |
791 | return false; | |
792 | ||
793 | /* In case X is also match_operator, compare predicates. */ | |
794 | if (code == MATCH_OPERATOR) | |
795 | { | |
796 | pred_name = XSTR (pt, 1); | |
797 | if (pred_name[0] != 0) | |
798 | { | |
799 | const struct pred_data *pred_pt = lookup_predicate (pred_name); | |
800 | if (!pred_pt || pred_pt != lookup_predicate (XSTR (x, 1))) | |
801 | return false; | |
802 | } | |
803 | } | |
804 | ||
805 | /* Compare operands. | |
806 | MATCH_OPERATOR in input template could match in original template | |
807 | either 1) MATCH_OPERAND, 2) UNSPEC, 3) ordinary operation (like PLUS). | |
808 | In the first case operands are at (XVECEXP (x, 2, j)), in the second | |
809 | - at (XVECEXP (x, 0, j)), in the last one - (XEXP (x, j)). | |
810 | X_VECEXP_POS variable shows, where to look for these operands. */ | |
811 | if (code == UNSPEC | |
812 | || code == UNSPEC_VOLATILE) | |
813 | x_vecexp_pos = 0; | |
814 | else if (code == MATCH_OPERATOR) | |
815 | x_vecexp_pos = 2; | |
816 | else | |
817 | x_vecexp_pos = -1; | |
818 | ||
819 | /* MATCH_OPERATOR or UNSPEC case. */ | |
820 | if (x_vecexp_pos >= 0) | |
821 | { | |
822 | /* Compare operands number in X and PT. */ | |
823 | if (XVECLEN (x, x_vecexp_pos) != XVECLEN (pt, 2)) | |
824 | return false; | |
825 | for (j = 0; j < XVECLEN (pt, 2); j++) | |
826 | if (!subst_pattern_match (XVECEXP (x, x_vecexp_pos, j), | |
cc472607 | 827 | XVECEXP (pt, 2, j), loc)) |
477c104e MK |
828 | return false; |
829 | } | |
830 | ||
831 | /* Ordinary operator. */ | |
832 | else | |
833 | { | |
834 | /* Compare operands number in X and PT. | |
835 | We count operands differently for X and PT since we compare | |
836 | an operator (with operands directly in RTX) and MATCH_OPERATOR | |
837 | (that has a vector with operands). */ | |
838 | if (GET_RTX_LENGTH (code) != XVECLEN (pt, 2)) | |
839 | return false; | |
840 | for (j = 0; j < XVECLEN (pt, 2); j++) | |
cc472607 | 841 | if (!subst_pattern_match (XEXP (x, j), XVECEXP (pt, 2, j), loc)) |
477c104e MK |
842 | return false; |
843 | } | |
844 | ||
845 | /* Store the operand to OPERAND_DATA array. */ | |
846 | gcc_assert (XINT (pt, 0) >= 0 && XINT (pt, 0) < MAX_OPERANDS); | |
847 | operand_data[XINT (pt, 0)] = x; | |
848 | return true; | |
849 | } | |
850 | ||
851 | if (code_pt == MATCH_PAR_DUP | |
852 | || code_pt == MATCH_DUP | |
853 | || code_pt == MATCH_OP_DUP | |
854 | || code_pt == MATCH_SCRATCH | |
855 | || code_pt == MATCH_PARALLEL) | |
856 | { | |
857 | /* Currently interface for these constructions isn't defined - | |
858 | probably they aren't needed in input template of define_subst at all. | |
859 | So, for now their usage in define_subst is forbidden. */ | |
cc472607 RS |
860 | error_at (loc, "%s cannot be used in define_subst", |
861 | GET_RTX_NAME (code_pt)); | |
477c104e MK |
862 | } |
863 | ||
864 | gcc_assert (code != MATCH_PAR_DUP | |
865 | && code_pt != MATCH_DUP | |
866 | && code_pt != MATCH_OP_DUP | |
867 | && code_pt != MATCH_SCRATCH | |
868 | && code_pt != MATCH_PARALLEL | |
869 | && code_pt != MATCH_OPERAND | |
870 | && code_pt != MATCH_OPERATOR); | |
871 | /* If PT is none of the handled above, then we match only expressions with | |
872 | the same code in X. */ | |
873 | if (code != code_pt) | |
874 | return false; | |
875 | ||
876 | fmt = GET_RTX_FORMAT (code_pt); | |
877 | len = GET_RTX_LENGTH (code_pt); | |
878 | ||
879 | for (i = 0; i < len; i++) | |
880 | { | |
881 | if (fmt[i] == '0') | |
882 | break; | |
883 | ||
884 | switch (fmt[i]) | |
885 | { | |
9fccb335 | 886 | case 'i': case 'r': case 'w': case 's': |
477c104e MK |
887 | continue; |
888 | ||
889 | case 'e': case 'u': | |
cc472607 | 890 | if (!subst_pattern_match (XEXP (x, i), XEXP (pt, i), loc)) |
477c104e MK |
891 | return false; |
892 | break; | |
893 | case 'E': | |
894 | { | |
895 | if (XVECLEN (x, i) != XVECLEN (pt, i)) | |
896 | return false; | |
897 | for (j = 0; j < XVECLEN (pt, i); j++) | |
cc472607 RS |
898 | if (!subst_pattern_match (XVECEXP (x, i, j), |
899 | XVECEXP (pt, i, j), loc)) | |
477c104e MK |
900 | return false; |
901 | break; | |
902 | } | |
903 | default: | |
904 | gcc_unreachable (); | |
905 | } | |
906 | } | |
907 | ||
908 | return true; | |
909 | } | |
910 | ||
3262c1f5 RH |
911 | /* Examine the attribute "predicable"; discover its boolean values |
912 | and its default. */ | |
913 | ||
914 | static void | |
3d7aafde | 915 | identify_predicable_attribute (void) |
3262c1f5 RH |
916 | { |
917 | struct queue_elem *elem; | |
d6edb99e | 918 | char *p_true, *p_false; |
3262c1f5 | 919 | const char *value; |
3262c1f5 RH |
920 | |
921 | /* Look for the DEFINE_ATTR for `predicable', which must exist. */ | |
922 | for (elem = define_attr_queue; elem ; elem = elem->next) | |
923 | if (strcmp (XSTR (elem->data, 0), "predicable") == 0) | |
924 | goto found; | |
925 | ||
cc472607 RS |
926 | error_at (define_cond_exec_queue->loc, |
927 | "attribute `predicable' not defined"); | |
3262c1f5 RH |
928 | return; |
929 | ||
930 | found: | |
931 | value = XSTR (elem->data, 1); | |
1dcd444b | 932 | p_false = xstrdup (value); |
d6edb99e ZW |
933 | p_true = strchr (p_false, ','); |
934 | if (p_true == NULL || strchr (++p_true, ',') != NULL) | |
3262c1f5 | 935 | { |
cc472607 | 936 | error_at (elem->loc, "attribute `predicable' is not a boolean"); |
04695783 | 937 | free (p_false); |
3262c1f5 RH |
938 | return; |
939 | } | |
d6edb99e | 940 | p_true[-1] = '\0'; |
3262c1f5 | 941 | |
d6edb99e ZW |
942 | predicable_true = p_true; |
943 | predicable_false = p_false; | |
3262c1f5 RH |
944 | |
945 | switch (GET_CODE (XEXP (elem->data, 2))) | |
946 | { | |
947 | case CONST_STRING: | |
948 | value = XSTR (XEXP (elem->data, 2), 0); | |
949 | break; | |
950 | ||
951 | case CONST: | |
cc472607 | 952 | error_at (elem->loc, "attribute `predicable' cannot be const"); |
04695783 | 953 | free (p_false); |
3262c1f5 RH |
954 | return; |
955 | ||
956 | default: | |
cc472607 RS |
957 | error_at (elem->loc, |
958 | "attribute `predicable' must have a constant default"); | |
04695783 | 959 | free (p_false); |
3262c1f5 RH |
960 | return; |
961 | } | |
962 | ||
d6edb99e | 963 | if (strcmp (value, p_true) == 0) |
3262c1f5 | 964 | predicable_default = 1; |
d6edb99e | 965 | else if (strcmp (value, p_false) == 0) |
3262c1f5 RH |
966 | predicable_default = 0; |
967 | else | |
968 | { | |
cc472607 RS |
969 | error_at (elem->loc, "unknown value `%s' for `predicable' attribute", |
970 | value); | |
04695783 | 971 | free (p_false); |
3262c1f5 RH |
972 | } |
973 | } | |
974 | ||
975 | /* Return the number of alternatives in constraint S. */ | |
976 | ||
977 | static int | |
3d7aafde | 978 | n_alternatives (const char *s) |
3262c1f5 RH |
979 | { |
980 | int n = 1; | |
981 | ||
982 | if (s) | |
983 | while (*s) | |
984 | n += (*s++ == ','); | |
985 | ||
986 | return n; | |
987 | } | |
988 | ||
477c104e MK |
989 | /* The routine scans rtl PATTERN, find match_operand in it and counts |
990 | number of alternatives. If PATTERN contains several match_operands | |
991 | with different number of alternatives, error is emitted, and the | |
992 | routine returns 0. If all match_operands in PATTERN have the same | |
993 | number of alternatives, it's stored in N_ALT, and the routine returns 1. | |
cc472607 | 994 | LOC is the location of PATTERN, for error reporting. */ |
477c104e | 995 | static int |
cc472607 | 996 | get_alternatives_number (rtx pattern, int *n_alt, file_location loc) |
477c104e MK |
997 | { |
998 | const char *fmt; | |
999 | enum rtx_code code; | |
1000 | int i, j, len; | |
1001 | ||
1002 | if (!n_alt) | |
1003 | return 0; | |
1004 | ||
1005 | code = GET_CODE (pattern); | |
1006 | switch (code) | |
1007 | { | |
1008 | case MATCH_OPERAND: | |
1009 | i = n_alternatives (XSTR (pattern, 2)); | |
1010 | /* n_alternatives returns 1 if constraint string is empty - | |
1011 | here we fix it up. */ | |
1012 | if (!*(XSTR (pattern, 2))) | |
1013 | i = 0; | |
1014 | if (*n_alt <= 0) | |
1015 | *n_alt = i; | |
1016 | ||
1017 | else if (i && i != *n_alt) | |
1018 | { | |
cc472607 RS |
1019 | error_at (loc, "wrong number of alternatives in operand %d", |
1020 | XINT (pattern, 0)); | |
477c104e MK |
1021 | return 0; |
1022 | } | |
1023 | ||
1024 | default: | |
1025 | break; | |
1026 | } | |
1027 | ||
1028 | fmt = GET_RTX_FORMAT (code); | |
1029 | len = GET_RTX_LENGTH (code); | |
1030 | for (i = 0; i < len; i++) | |
1031 | { | |
1032 | switch (fmt[i]) | |
1033 | { | |
1034 | case 'e': case 'u': | |
cc472607 RS |
1035 | if (!get_alternatives_number (XEXP (pattern, i), n_alt, loc)) |
1036 | return 0; | |
477c104e MK |
1037 | break; |
1038 | ||
1039 | case 'V': | |
1040 | if (XVEC (pattern, i) == NULL) | |
1041 | break; | |
191816a3 | 1042 | /* FALLTHRU */ |
477c104e MK |
1043 | |
1044 | case 'E': | |
1045 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
cc472607 RS |
1046 | if (!get_alternatives_number (XVECEXP (pattern, i, j), n_alt, loc)) |
1047 | return 0; | |
477c104e MK |
1048 | break; |
1049 | ||
9fccb335 | 1050 | case 'i': case 'r': case 'w': case '0': case 's': case 'S': case 'T': |
477c104e MK |
1051 | break; |
1052 | ||
1053 | default: | |
1054 | gcc_unreachable (); | |
1055 | } | |
1056 | } | |
1057 | return 1; | |
1058 | } | |
1059 | ||
3262c1f5 RH |
1060 | /* Determine how many alternatives there are in INSN, and how many |
1061 | operands. */ | |
1062 | ||
1063 | static void | |
3d7aafde | 1064 | collect_insn_data (rtx pattern, int *palt, int *pmax) |
3262c1f5 RH |
1065 | { |
1066 | const char *fmt; | |
1067 | enum rtx_code code; | |
1068 | int i, j, len; | |
1069 | ||
1070 | code = GET_CODE (pattern); | |
1071 | switch (code) | |
1072 | { | |
1073 | case MATCH_OPERAND: | |
b7e2dd6f BS |
1074 | case MATCH_SCRATCH: |
1075 | i = n_alternatives (XSTR (pattern, code == MATCH_SCRATCH ? 1 : 2)); | |
892ecf92 | 1076 | *palt = (i > *palt ? i : *palt); |
5d3cc252 | 1077 | /* Fall through. */ |
3262c1f5 RH |
1078 | |
1079 | case MATCH_OPERATOR: | |
3262c1f5 | 1080 | case MATCH_PARALLEL: |
3262c1f5 RH |
1081 | i = XINT (pattern, 0); |
1082 | if (i > *pmax) | |
1083 | *pmax = i; | |
1084 | break; | |
1085 | ||
1086 | default: | |
1087 | break; | |
1088 | } | |
1089 | ||
1090 | fmt = GET_RTX_FORMAT (code); | |
1091 | len = GET_RTX_LENGTH (code); | |
1092 | for (i = 0; i < len; i++) | |
1093 | { | |
1094 | switch (fmt[i]) | |
1095 | { | |
1096 | case 'e': case 'u': | |
1097 | collect_insn_data (XEXP (pattern, i), palt, pmax); | |
1098 | break; | |
1099 | ||
1100 | case 'V': | |
1101 | if (XVEC (pattern, i) == NULL) | |
1102 | break; | |
5d3cc252 | 1103 | /* Fall through. */ |
3262c1f5 RH |
1104 | case 'E': |
1105 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1106 | collect_insn_data (XVECEXP (pattern, i, j), palt, pmax); | |
1107 | break; | |
1108 | ||
9fccb335 | 1109 | case 'i': case 'r': case 'w': case '0': case 's': case 'S': case 'T': |
3262c1f5 RH |
1110 | break; |
1111 | ||
1112 | default: | |
b2d59f6f | 1113 | gcc_unreachable (); |
3262c1f5 RH |
1114 | } |
1115 | } | |
1116 | } | |
1117 | ||
1118 | static rtx | |
cc472607 RS |
1119 | alter_predicate_for_insn (rtx pattern, int alt, int max_op, |
1120 | file_location loc) | |
3262c1f5 RH |
1121 | { |
1122 | const char *fmt; | |
1123 | enum rtx_code code; | |
1124 | int i, j, len; | |
1125 | ||
1126 | code = GET_CODE (pattern); | |
1127 | switch (code) | |
1128 | { | |
1129 | case MATCH_OPERAND: | |
1130 | { | |
1131 | const char *c = XSTR (pattern, 2); | |
1132 | ||
1133 | if (n_alternatives (c) != 1) | |
1134 | { | |
cc472607 RS |
1135 | error_at (loc, "too many alternatives for operand %d", |
1136 | XINT (pattern, 0)); | |
3262c1f5 RH |
1137 | return NULL; |
1138 | } | |
1139 | ||
1140 | /* Replicate C as needed to fill out ALT alternatives. */ | |
1141 | if (c && *c && alt > 1) | |
1142 | { | |
1143 | size_t c_len = strlen (c); | |
1144 | size_t len = alt * (c_len + 1); | |
477c104e | 1145 | char *new_c = XNEWVEC (char, len); |
3262c1f5 RH |
1146 | |
1147 | memcpy (new_c, c, c_len); | |
1148 | for (i = 1; i < alt; ++i) | |
1149 | { | |
1150 | new_c[i * (c_len + 1) - 1] = ','; | |
1151 | memcpy (&new_c[i * (c_len + 1)], c, c_len); | |
1152 | } | |
1153 | new_c[len - 1] = '\0'; | |
1154 | XSTR (pattern, 2) = new_c; | |
1155 | } | |
1156 | } | |
5d3cc252 | 1157 | /* Fall through. */ |
3262c1f5 RH |
1158 | |
1159 | case MATCH_OPERATOR: | |
1160 | case MATCH_SCRATCH: | |
1161 | case MATCH_PARALLEL: | |
3262c1f5 RH |
1162 | XINT (pattern, 0) += max_op; |
1163 | break; | |
1164 | ||
1165 | default: | |
1166 | break; | |
1167 | } | |
1168 | ||
1169 | fmt = GET_RTX_FORMAT (code); | |
1170 | len = GET_RTX_LENGTH (code); | |
1171 | for (i = 0; i < len; i++) | |
1172 | { | |
1173 | rtx r; | |
1174 | ||
1175 | switch (fmt[i]) | |
1176 | { | |
1177 | case 'e': case 'u': | |
cc472607 | 1178 | r = alter_predicate_for_insn (XEXP (pattern, i), alt, max_op, loc); |
3262c1f5 RH |
1179 | if (r == NULL) |
1180 | return r; | |
1181 | break; | |
1182 | ||
1183 | case 'E': | |
1184 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1185 | { | |
1186 | r = alter_predicate_for_insn (XVECEXP (pattern, i, j), | |
cc472607 | 1187 | alt, max_op, loc); |
3262c1f5 RH |
1188 | if (r == NULL) |
1189 | return r; | |
1190 | } | |
1191 | break; | |
1192 | ||
9fccb335 | 1193 | case 'i': case 'r': case 'w': case '0': case 's': |
3262c1f5 RH |
1194 | break; |
1195 | ||
1196 | default: | |
b2d59f6f | 1197 | gcc_unreachable (); |
3262c1f5 RH |
1198 | } |
1199 | } | |
1200 | ||
1201 | return pattern; | |
1202 | } | |
1203 | ||
477c104e MK |
1204 | /* Duplicate constraints in PATTERN. If pattern is from original |
1205 | rtl-template, we need to duplicate each alternative - for that we | |
1206 | need to use duplicate_each_alternative () as a functor ALTER. | |
1207 | If pattern is from output-pattern of define_subst, we need to | |
1208 | duplicate constraints in another way - with duplicate_alternatives (). | |
1209 | N_DUP is multiplication factor. */ | |
1210 | static rtx | |
1211 | alter_constraints (rtx pattern, int n_dup, constraints_handler_t alter) | |
1212 | { | |
1213 | const char *fmt; | |
1214 | enum rtx_code code; | |
1215 | int i, j, len; | |
1216 | ||
1217 | code = GET_CODE (pattern); | |
1218 | switch (code) | |
1219 | { | |
1220 | case MATCH_OPERAND: | |
1221 | XSTR (pattern, 2) = alter (XSTR (pattern, 2), n_dup); | |
1222 | break; | |
1223 | ||
1224 | default: | |
1225 | break; | |
1226 | } | |
1227 | ||
1228 | fmt = GET_RTX_FORMAT (code); | |
1229 | len = GET_RTX_LENGTH (code); | |
1230 | for (i = 0; i < len; i++) | |
1231 | { | |
1232 | rtx r; | |
1233 | ||
1234 | switch (fmt[i]) | |
1235 | { | |
1236 | case 'e': case 'u': | |
1237 | r = alter_constraints (XEXP (pattern, i), n_dup, alter); | |
1238 | if (r == NULL) | |
1239 | return r; | |
1240 | break; | |
1241 | ||
1242 | case 'E': | |
1243 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1244 | { | |
1245 | r = alter_constraints (XVECEXP (pattern, i, j), n_dup, alter); | |
1246 | if (r == NULL) | |
1247 | return r; | |
1248 | } | |
1249 | break; | |
1250 | ||
9fccb335 | 1251 | case 'i': case 'r': case 'w': case '0': case 's': |
477c104e MK |
1252 | break; |
1253 | ||
1254 | default: | |
1255 | break; | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | return pattern; | |
1260 | } | |
1261 | ||
3262c1f5 | 1262 | static const char * |
3d7aafde AJ |
1263 | alter_test_for_insn (struct queue_elem *ce_elem, |
1264 | struct queue_elem *insn_elem) | |
3262c1f5 | 1265 | { |
b78027d1 DM |
1266 | return rtx_reader_ptr->join_c_conditions (XSTR (ce_elem->data, 1), |
1267 | XSTR (insn_elem->data, 2)); | |
3262c1f5 RH |
1268 | } |
1269 | ||
0bddee8e BS |
1270 | /* Modify VAL, which is an attribute expression for the "enabled" attribute, |
1271 | to take "ce_enabled" into account. Return the new expression. */ | |
1272 | static rtx | |
1273 | modify_attr_enabled_ce (rtx val) | |
1274 | { | |
1275 | rtx eq_attr, str; | |
1276 | rtx ite; | |
1277 | eq_attr = rtx_alloc (EQ_ATTR); | |
1278 | ite = rtx_alloc (IF_THEN_ELSE); | |
1279 | str = rtx_alloc (CONST_STRING); | |
1280 | ||
1281 | XSTR (eq_attr, 0) = "ce_enabled"; | |
1282 | XSTR (eq_attr, 1) = "yes"; | |
1283 | XSTR (str, 0) = "no"; | |
1284 | XEXP (ite, 0) = eq_attr; | |
1285 | XEXP (ite, 1) = val; | |
1286 | XEXP (ite, 2) = str; | |
1287 | ||
1288 | return ite; | |
1289 | } | |
1290 | ||
1291 | /* Alter the attribute vector of INSN, which is a COND_EXEC variant created | |
1292 | from a define_insn pattern. We must modify the "predicable" attribute | |
1293 | to be named "ce_enabled", and also change any "enabled" attribute that's | |
1294 | present so that it takes ce_enabled into account. | |
1295 | We rely on the fact that INSN was created with copy_rtx, and modify data | |
1296 | in-place. */ | |
1297 | ||
1298 | static void | |
1299 | alter_attrs_for_insn (rtx insn) | |
1300 | { | |
1301 | static bool global_changes_made = false; | |
1302 | rtvec vec = XVEC (insn, 4); | |
1303 | rtvec new_vec; | |
1304 | rtx val, set; | |
1305 | int num_elem; | |
1306 | int predicable_idx = -1; | |
1307 | int enabled_idx = -1; | |
1308 | int i; | |
1309 | ||
1310 | if (! vec) | |
1311 | return; | |
1312 | ||
1313 | num_elem = GET_NUM_ELEM (vec); | |
1314 | for (i = num_elem - 1; i >= 0; --i) | |
1315 | { | |
1316 | rtx sub = RTVEC_ELT (vec, i); | |
1317 | switch (GET_CODE (sub)) | |
1318 | { | |
1319 | case SET_ATTR: | |
1320 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
1321 | { | |
1322 | predicable_idx = i; | |
1323 | XSTR (sub, 0) = "ce_enabled"; | |
1324 | } | |
1325 | else if (strcmp (XSTR (sub, 0), "enabled") == 0) | |
1326 | { | |
1327 | enabled_idx = i; | |
1328 | XSTR (sub, 0) = "nonce_enabled"; | |
1329 | } | |
1330 | break; | |
1331 | ||
1332 | case SET_ATTR_ALTERNATIVE: | |
1333 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
1334 | /* We already give an error elsewhere. */ | |
1335 | return; | |
1336 | else if (strcmp (XSTR (sub, 0), "enabled") == 0) | |
1337 | { | |
1338 | enabled_idx = i; | |
1339 | XSTR (sub, 0) = "nonce_enabled"; | |
1340 | } | |
1341 | break; | |
1342 | ||
1343 | case SET: | |
1344 | if (GET_CODE (SET_DEST (sub)) != ATTR) | |
1345 | break; | |
1346 | if (strcmp (XSTR (SET_DEST (sub), 0), "predicable") == 0) | |
1347 | { | |
1348 | sub = SET_SRC (sub); | |
1349 | if (GET_CODE (sub) == CONST_STRING) | |
1350 | { | |
1351 | predicable_idx = i; | |
1352 | XSTR (sub, 0) = "ce_enabled"; | |
1353 | } | |
1354 | else | |
1355 | /* We already give an error elsewhere. */ | |
1356 | return; | |
1357 | break; | |
1358 | } | |
1359 | if (strcmp (XSTR (SET_DEST (sub), 0), "enabled") == 0) | |
1360 | { | |
1361 | enabled_idx = i; | |
1362 | XSTR (SET_DEST (sub), 0) = "nonce_enabled"; | |
1363 | } | |
1364 | break; | |
1365 | ||
1366 | default: | |
1367 | gcc_unreachable (); | |
1368 | } | |
1369 | } | |
1370 | if (predicable_idx == -1) | |
1371 | return; | |
1372 | ||
1373 | if (!global_changes_made) | |
1374 | { | |
1375 | struct queue_elem *elem; | |
477c104e | 1376 | |
0bddee8e BS |
1377 | global_changes_made = true; |
1378 | add_define_attr ("ce_enabled"); | |
1379 | add_define_attr ("nonce_enabled"); | |
1380 | ||
1381 | for (elem = define_attr_queue; elem ; elem = elem->next) | |
1382 | if (strcmp (XSTR (elem->data, 0), "enabled") == 0) | |
1383 | { | |
1384 | XEXP (elem->data, 2) | |
1385 | = modify_attr_enabled_ce (XEXP (elem->data, 2)); | |
1386 | } | |
1387 | } | |
1388 | if (enabled_idx == -1) | |
1389 | return; | |
1390 | ||
1391 | new_vec = rtvec_alloc (num_elem + 1); | |
1392 | for (i = 0; i < num_elem; i++) | |
1393 | RTVEC_ELT (new_vec, i) = RTVEC_ELT (vec, i); | |
1394 | val = rtx_alloc (IF_THEN_ELSE); | |
1395 | XEXP (val, 0) = rtx_alloc (EQ_ATTR); | |
1396 | XEXP (val, 1) = rtx_alloc (CONST_STRING); | |
1397 | XEXP (val, 2) = rtx_alloc (CONST_STRING); | |
1398 | XSTR (XEXP (val, 0), 0) = "nonce_enabled"; | |
1399 | XSTR (XEXP (val, 0), 1) = "yes"; | |
1400 | XSTR (XEXP (val, 1), 0) = "yes"; | |
1401 | XSTR (XEXP (val, 2), 0) = "no"; | |
1402 | set = rtx_alloc (SET); | |
1403 | SET_DEST (set) = rtx_alloc (ATTR); | |
1404 | XSTR (SET_DEST (set), 0) = "enabled"; | |
1405 | SET_SRC (set) = modify_attr_enabled_ce (val); | |
1406 | RTVEC_ELT (new_vec, i) = set; | |
1407 | XVEC (insn, 4) = new_vec; | |
1408 | } | |
1409 | ||
477c104e MK |
1410 | /* As number of constraints is changed after define_subst, we need to |
1411 | process attributes as well - we need to duplicate them the same way | |
1412 | that we duplicated constraints in original pattern | |
1413 | ELEM is a queue element, containing our rtl-template, | |
1414 | N_DUP - multiplication factor. */ | |
1415 | static void | |
1416 | alter_attrs_for_subst_insn (struct queue_elem * elem, int n_dup) | |
3262c1f5 | 1417 | { |
477c104e MK |
1418 | rtvec vec = XVEC (elem->data, 4); |
1419 | int num_elem; | |
1420 | int i; | |
1421 | ||
1422 | if (n_dup < 2 || ! vec) | |
1423 | return; | |
1424 | ||
1425 | num_elem = GET_NUM_ELEM (vec); | |
1426 | for (i = num_elem - 1; i >= 0; --i) | |
3262c1f5 | 1427 | { |
477c104e MK |
1428 | rtx sub = RTVEC_ELT (vec, i); |
1429 | switch (GET_CODE (sub)) | |
3262c1f5 | 1430 | { |
477c104e MK |
1431 | case SET_ATTR: |
1432 | if (strchr (XSTR (sub, 1), ',') != NULL) | |
1433 | XSTR (sub, 1) = duplicate_alternatives (XSTR (sub, 1), n_dup); | |
1434 | break; | |
1435 | ||
1436 | case SET_ATTR_ALTERNATIVE: | |
1437 | case SET: | |
cc472607 RS |
1438 | error_at (elem->loc, |
1439 | "%s: `define_subst' does not support attributes " | |
1440 | "assigned by `set' and `set_attr_alternative'", | |
1441 | XSTR (elem->data, 0)); | |
477c104e MK |
1442 | return; |
1443 | ||
1444 | default: | |
1445 | gcc_unreachable (); | |
1446 | } | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | /* Adjust all of the operand numbers in SRC to match the shift they'll | |
1451 | get from an operand displacement of DISP. Return a pointer after the | |
1452 | adjusted string. */ | |
1453 | ||
1454 | static char * | |
1455 | shift_output_template (char *dest, const char *src, int disp) | |
1456 | { | |
1457 | while (*src) | |
1458 | { | |
1459 | char c = *src++; | |
1460 | *dest++ = c; | |
1461 | if (c == '%') | |
1462 | { | |
1463 | c = *src++; | |
1464 | if (ISDIGIT ((unsigned char) c)) | |
1465 | c += disp; | |
1466 | else if (ISALPHA (c)) | |
1467 | { | |
53ed1a12 | 1468 | *dest++ = c; |
1ad463f4 | 1469 | c = *src++ + disp; |
3262c1f5 | 1470 | } |
53ed1a12 | 1471 | *dest++ = c; |
3262c1f5 RH |
1472 | } |
1473 | } | |
1474 | ||
53ed1a12 | 1475 | return dest; |
3262c1f5 RH |
1476 | } |
1477 | ||
1478 | static const char * | |
3d7aafde AJ |
1479 | alter_output_for_insn (struct queue_elem *ce_elem, |
1480 | struct queue_elem *insn_elem, | |
1481 | int alt, int max_op) | |
3262c1f5 RH |
1482 | { |
1483 | const char *ce_out, *insn_out; | |
53ed1a12 | 1484 | char *result, *p; |
3262c1f5 RH |
1485 | size_t len, ce_len, insn_len; |
1486 | ||
1487 | /* ??? Could coordinate with genoutput to not duplicate code here. */ | |
1488 | ||
1489 | ce_out = XSTR (ce_elem->data, 2); | |
66621f9e | 1490 | insn_out = XTMPL (insn_elem->data, 3); |
3262c1f5 RH |
1491 | if (!ce_out || *ce_out == '\0') |
1492 | return insn_out; | |
1493 | ||
1494 | ce_len = strlen (ce_out); | |
1495 | insn_len = strlen (insn_out); | |
1496 | ||
1497 | if (*insn_out == '*') | |
1498 | /* You must take care of the predicate yourself. */ | |
1499 | return insn_out; | |
1500 | ||
1501 | if (*insn_out == '@') | |
1502 | { | |
1503 | len = (ce_len + 1) * alt + insn_len + 1; | |
477c104e | 1504 | p = result = XNEWVEC (char, len); |
3262c1f5 RH |
1505 | |
1506 | do | |
1507 | { | |
1508 | do | |
1509 | *p++ = *insn_out++; | |
1510 | while (ISSPACE ((unsigned char) *insn_out)); | |
1511 | ||
1512 | if (*insn_out != '#') | |
1513 | { | |
1514 | p = shift_output_template (p, ce_out, max_op); | |
1515 | *p++ = ' '; | |
1516 | } | |
1517 | ||
1518 | do | |
1519 | *p++ = *insn_out++; | |
1520 | while (*insn_out && *insn_out != '\n'); | |
1521 | } | |
1522 | while (*insn_out); | |
1523 | *p = '\0'; | |
1524 | } | |
1525 | else | |
1526 | { | |
1527 | len = ce_len + 1 + insn_len + 1; | |
53ed1a12 | 1528 | result = XNEWVEC (char, len); |
3262c1f5 | 1529 | |
53ed1a12 | 1530 | p = shift_output_template (result, ce_out, max_op); |
3262c1f5 RH |
1531 | *p++ = ' '; |
1532 | memcpy (p, insn_out, insn_len + 1); | |
1533 | } | |
1534 | ||
53ed1a12 | 1535 | return result; |
3262c1f5 RH |
1536 | } |
1537 | ||
477c104e MK |
1538 | /* From string STR "a,b,c" produce "a,b,c,a,b,c,a,b,c", i.e. original |
1539 | string, duplicated N_DUP times. */ | |
1540 | ||
1541 | static const char * | |
1542 | duplicate_alternatives (const char * str, int n_dup) | |
1543 | { | |
1544 | int i, len, new_len; | |
1545 | char *result, *sp; | |
1546 | const char *cp; | |
1547 | ||
1548 | if (n_dup < 2) | |
1549 | return str; | |
1550 | ||
1551 | while (ISSPACE (*str)) | |
1552 | str++; | |
1553 | ||
1554 | if (*str == '\0') | |
1555 | return str; | |
1556 | ||
1557 | cp = str; | |
1558 | len = strlen (str); | |
1559 | new_len = (len + 1) * n_dup; | |
1560 | ||
1561 | sp = result = XNEWVEC (char, new_len); | |
1562 | ||
1563 | /* Global modifier characters mustn't be duplicated: skip if found. */ | |
1564 | if (*cp == '=' || *cp == '+' || *cp == '%') | |
1565 | { | |
1566 | *sp++ = *cp++; | |
1567 | len--; | |
1568 | } | |
1569 | ||
1570 | /* Copy original constraints N_DUP times. */ | |
1571 | for (i = 0; i < n_dup; i++, sp += len+1) | |
1572 | { | |
1573 | memcpy (sp, cp, len); | |
1574 | *(sp+len) = (i == n_dup - 1) ? '\0' : ','; | |
1575 | } | |
1576 | ||
1577 | return result; | |
1578 | } | |
1579 | ||
1580 | /* From string STR "a,b,c" produce "a,a,a,b,b,b,c,c,c", i.e. string where | |
1581 | each alternative from the original string is duplicated N_DUP times. */ | |
1582 | static const char * | |
1583 | duplicate_each_alternative (const char * str, int n_dup) | |
1584 | { | |
1585 | int i, len, new_len; | |
1586 | char *result, *sp, *ep, *cp; | |
1587 | ||
1588 | if (n_dup < 2) | |
1589 | return str; | |
1590 | ||
1591 | while (ISSPACE (*str)) | |
1592 | str++; | |
1593 | ||
1594 | if (*str == '\0') | |
1595 | return str; | |
1596 | ||
1597 | cp = xstrdup (str); | |
1598 | ||
1599 | new_len = (strlen (cp) + 1) * n_dup; | |
1600 | ||
1601 | sp = result = XNEWVEC (char, new_len); | |
1602 | ||
1603 | /* Global modifier characters mustn't be duplicated: skip if found. */ | |
1604 | if (*cp == '=' || *cp == '+' || *cp == '%') | |
1605 | *sp++ = *cp++; | |
1606 | ||
1607 | do | |
1608 | { | |
1609 | if ((ep = strchr (cp, ',')) != NULL) | |
1610 | *ep++ = '\0'; | |
1611 | len = strlen (cp); | |
1612 | ||
1613 | /* Copy a constraint N_DUP times. */ | |
1614 | for (i = 0; i < n_dup; i++, sp += len + 1) | |
1615 | { | |
1616 | memcpy (sp, cp, len); | |
1617 | *(sp+len) = (ep == NULL && i == n_dup - 1) ? '\0' : ','; | |
1618 | } | |
1619 | ||
1620 | cp = ep; | |
1621 | } | |
1622 | while (cp != NULL); | |
1623 | ||
1624 | return result; | |
1625 | } | |
1626 | ||
1627 | /* Alter the output of INSN whose pattern was modified by | |
1628 | DEFINE_SUBST. We must replicate output strings according | |
1629 | to the new number of alternatives ALT in substituted pattern. | |
1630 | If ALT equals 1, output has one alternative or defined by C | |
1631 | code, then output is returned without any changes. */ | |
1632 | ||
1633 | static const char * | |
1634 | alter_output_for_subst_insn (rtx insn, int alt) | |
1635 | { | |
c5cb7968 JJ |
1636 | const char *insn_out, *old_out; |
1637 | char *new_out, *cp; | |
1638 | size_t old_len, new_len; | |
1639 | int j; | |
477c104e MK |
1640 | |
1641 | insn_out = XTMPL (insn, 3); | |
1642 | ||
c5cb7968 | 1643 | if (alt < 2 || *insn_out != '@') |
477c104e MK |
1644 | return insn_out; |
1645 | ||
c5cb7968 JJ |
1646 | old_out = insn_out + 1; |
1647 | while (ISSPACE (*old_out)) | |
1648 | old_out++; | |
1649 | old_len = strlen (old_out); | |
477c104e | 1650 | |
c5cb7968 | 1651 | new_len = alt * (old_len + 1) + 1; |
477c104e MK |
1652 | |
1653 | new_out = XNEWVEC (char, new_len); | |
1654 | new_out[0] = '@'; | |
1655 | ||
c5cb7968 | 1656 | for (j = 0, cp = new_out + 1; j < alt; j++, cp += old_len + 1) |
477c104e | 1657 | { |
c5cb7968 JJ |
1658 | memcpy (cp, old_out, old_len); |
1659 | cp[old_len] = (j == alt - 1) ? '\0' : '\n'; | |
477c104e MK |
1660 | } |
1661 | ||
1662 | return new_out; | |
1663 | } | |
1664 | ||
3262c1f5 RH |
1665 | /* Replicate insns as appropriate for the given DEFINE_COND_EXEC. */ |
1666 | ||
1667 | static void | |
3d7aafde | 1668 | process_one_cond_exec (struct queue_elem *ce_elem) |
3262c1f5 RH |
1669 | { |
1670 | struct queue_elem *insn_elem; | |
1671 | for (insn_elem = define_insn_queue; insn_elem ; insn_elem = insn_elem->next) | |
1672 | { | |
1673 | int alternatives, max_operand; | |
a406f566 | 1674 | rtx pred, insn, pattern, split; |
2f6c5b27 | 1675 | char *new_name; |
a406f566 | 1676 | int i; |
3262c1f5 RH |
1677 | |
1678 | if (! is_predicable (insn_elem)) | |
1679 | continue; | |
1680 | ||
1681 | alternatives = 1; | |
1682 | max_operand = -1; | |
1683 | collect_insn_data (insn_elem->data, &alternatives, &max_operand); | |
1684 | max_operand += 1; | |
1685 | ||
1686 | if (XVECLEN (ce_elem->data, 0) != 1) | |
1687 | { | |
cc472607 | 1688 | error_at (ce_elem->loc, "too many patterns in predicate"); |
3262c1f5 RH |
1689 | return; |
1690 | } | |
1691 | ||
1692 | pred = copy_rtx (XVECEXP (ce_elem->data, 0, 0)); | |
1693 | pred = alter_predicate_for_insn (pred, alternatives, max_operand, | |
cc472607 | 1694 | ce_elem->loc); |
3262c1f5 RH |
1695 | if (pred == NULL) |
1696 | return; | |
1697 | ||
1698 | /* Construct a new pattern for the new insn. */ | |
1699 | insn = copy_rtx (insn_elem->data); | |
2f6c5b27 SB |
1700 | new_name = XNEWVAR (char, strlen XSTR (insn_elem->data, 0) + 4); |
1701 | sprintf (new_name, "*p %s", XSTR (insn_elem->data, 0)); | |
1702 | XSTR (insn, 0) = new_name; | |
3262c1f5 RH |
1703 | pattern = rtx_alloc (COND_EXEC); |
1704 | XEXP (pattern, 0) = pred; | |
313d38e3 RS |
1705 | XEXP (pattern, 1) = add_implicit_parallel (XVEC (insn, 1)); |
1706 | XVEC (insn, 1) = rtvec_alloc (1); | |
1707 | XVECEXP (insn, 1, 0) = pattern; | |
3262c1f5 | 1708 | |
aadaf24e KT |
1709 | if (XVEC (ce_elem->data, 3) != NULL) |
1710 | { | |
1711 | rtvec attributes = rtvec_alloc (XVECLEN (insn, 4) | |
1712 | + XVECLEN (ce_elem->data, 3)); | |
1713 | int i = 0; | |
1714 | int j = 0; | |
1715 | for (i = 0; i < XVECLEN (insn, 4); i++) | |
1716 | RTVEC_ELT (attributes, i) = XVECEXP (insn, 4, i); | |
1717 | ||
1718 | for (j = 0; j < XVECLEN (ce_elem->data, 3); j++, i++) | |
1719 | RTVEC_ELT (attributes, i) = XVECEXP (ce_elem->data, 3, j); | |
1720 | ||
1721 | XVEC (insn, 4) = attributes; | |
1722 | } | |
1723 | ||
3262c1f5 | 1724 | XSTR (insn, 2) = alter_test_for_insn (ce_elem, insn_elem); |
66621f9e | 1725 | XTMPL (insn, 3) = alter_output_for_insn (ce_elem, insn_elem, |
3262c1f5 | 1726 | alternatives, max_operand); |
0bddee8e | 1727 | alter_attrs_for_insn (insn); |
3262c1f5 RH |
1728 | |
1729 | /* Put the new pattern on the `other' list so that it | |
1730 | (a) is not reprocessed by other define_cond_exec patterns | |
1731 | (b) appears after all normal define_insn patterns. | |
1732 | ||
1733 | ??? B is debatable. If one has normal insns that match | |
1734 | cond_exec patterns, they will be preferred over these | |
1735 | generated patterns. Whether this matters in practice, or if | |
1736 | it's a good thing, or whether we should thread these new | |
1737 | patterns into the define_insn chain just after their generator | |
1738 | is something we'll have to experiment with. */ | |
1739 | ||
cc472607 | 1740 | queue_pattern (insn, &other_tail, insn_elem->loc); |
a406f566 MM |
1741 | |
1742 | if (!insn_elem->split) | |
1743 | continue; | |
1744 | ||
1745 | /* If the original insn came from a define_insn_and_split, | |
9cf737f8 | 1746 | generate a new split to handle the predicated insn. */ |
a406f566 MM |
1747 | split = copy_rtx (insn_elem->split->data); |
1748 | /* Predicate the pattern matched by the split. */ | |
1749 | pattern = rtx_alloc (COND_EXEC); | |
1750 | XEXP (pattern, 0) = pred; | |
313d38e3 RS |
1751 | XEXP (pattern, 1) = add_implicit_parallel (XVEC (split, 0)); |
1752 | XVEC (split, 0) = rtvec_alloc (1); | |
1753 | XVECEXP (split, 0, 0) = pattern; | |
1754 | ||
a406f566 MM |
1755 | /* Predicate all of the insns generated by the split. */ |
1756 | for (i = 0; i < XVECLEN (split, 2); i++) | |
1757 | { | |
1758 | pattern = rtx_alloc (COND_EXEC); | |
1759 | XEXP (pattern, 0) = pred; | |
1760 | XEXP (pattern, 1) = XVECEXP (split, 2, i); | |
1761 | XVECEXP (split, 2, i) = pattern; | |
1762 | } | |
1763 | /* Add the new split to the queue. */ | |
cc472607 | 1764 | queue_pattern (split, &other_tail, insn_elem->split->loc); |
3262c1f5 RH |
1765 | } |
1766 | } | |
1767 | ||
477c104e MK |
1768 | /* Try to apply define_substs to the given ELEM. |
1769 | Only define_substs, specified via attributes would be applied. | |
1770 | If attribute, requiring define_subst, is set, but no define_subst | |
1771 | was applied, ELEM would be deleted. */ | |
1772 | ||
1773 | static void | |
1774 | process_substs_on_one_elem (struct queue_elem *elem, | |
1775 | struct queue_elem *queue) | |
1776 | { | |
1777 | struct queue_elem *subst_elem; | |
1778 | int i, j, patterns_match; | |
1779 | ||
1780 | for (subst_elem = define_subst_queue; | |
1781 | subst_elem; subst_elem = subst_elem->next) | |
1782 | { | |
1783 | int alternatives, alternatives_subst; | |
1784 | rtx subst_pattern; | |
1785 | rtvec subst_pattern_vec; | |
1786 | ||
1787 | if (!has_subst_attribute (elem, subst_elem)) | |
1788 | continue; | |
1789 | ||
1790 | /* Compare original rtl-pattern from define_insn with input | |
1791 | pattern from define_subst. | |
1792 | Also, check if numbers of alternatives are the same in all | |
1793 | match_operands. */ | |
1794 | if (XVECLEN (elem->data, 1) != XVECLEN (subst_elem->data, 1)) | |
1795 | continue; | |
1796 | patterns_match = 1; | |
1797 | alternatives = -1; | |
1798 | alternatives_subst = -1; | |
1799 | for (j = 0; j < XVECLEN (elem->data, 1); j++) | |
1800 | { | |
1801 | if (!subst_pattern_match (XVECEXP (elem->data, 1, j), | |
1802 | XVECEXP (subst_elem->data, 1, j), | |
cc472607 | 1803 | subst_elem->loc)) |
477c104e MK |
1804 | { |
1805 | patterns_match = 0; | |
1806 | break; | |
1807 | } | |
1808 | ||
1809 | if (!get_alternatives_number (XVECEXP (elem->data, 1, j), | |
cc472607 | 1810 | &alternatives, subst_elem->loc)) |
477c104e MK |
1811 | { |
1812 | patterns_match = 0; | |
1813 | break; | |
1814 | } | |
1815 | } | |
1816 | ||
1817 | /* Check if numbers of alternatives are the same in all | |
1818 | match_operands in output template of define_subst. */ | |
1819 | for (j = 0; j < XVECLEN (subst_elem->data, 3); j++) | |
1820 | { | |
1821 | if (!get_alternatives_number (XVECEXP (subst_elem->data, 3, j), | |
1822 | &alternatives_subst, | |
cc472607 | 1823 | subst_elem->loc)) |
477c104e MK |
1824 | { |
1825 | patterns_match = 0; | |
1826 | break; | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | if (!patterns_match) | |
1831 | continue; | |
1832 | ||
1833 | /* Clear array in which we save occupied indexes of operands. */ | |
1834 | memset (used_operands_numbers, 0, sizeof (used_operands_numbers)); | |
1835 | ||
1836 | /* Create a pattern, based on the output one from define_subst. */ | |
1837 | subst_pattern_vec = rtvec_alloc (XVECLEN (subst_elem->data, 3)); | |
1838 | for (j = 0; j < XVECLEN (subst_elem->data, 3); j++) | |
1839 | { | |
1840 | subst_pattern = copy_rtx (XVECEXP (subst_elem->data, 3, j)); | |
1841 | ||
1842 | /* Duplicate constraints in substitute-pattern. */ | |
1843 | subst_pattern = alter_constraints (subst_pattern, alternatives, | |
1844 | duplicate_each_alternative); | |
1845 | ||
a7ba15ca | 1846 | subst_pattern = adjust_operands_numbers (subst_pattern); |
477c104e MK |
1847 | |
1848 | /* Substitute match_dup and match_op_dup in the new pattern and | |
1849 | duplicate constraints. */ | |
1850 | subst_pattern = subst_dup (subst_pattern, alternatives, | |
1851 | alternatives_subst); | |
1852 | ||
1853 | replace_duplicating_operands_in_pattern (subst_pattern); | |
1854 | ||
1855 | /* We don't need any constraints in DEFINE_EXPAND. */ | |
1856 | if (GET_CODE (elem->data) == DEFINE_EXPAND) | |
1857 | remove_constraints (subst_pattern); | |
1858 | ||
a7ba15ca | 1859 | RTVEC_ELT (subst_pattern_vec, j) = subst_pattern; |
477c104e MK |
1860 | } |
1861 | XVEC (elem->data, 1) = subst_pattern_vec; | |
1862 | ||
1863 | for (i = 0; i < MAX_OPERANDS; i++) | |
1864 | match_operand_entries_in_pattern[i] = NULL; | |
1865 | ||
1866 | if (GET_CODE (elem->data) == DEFINE_INSN) | |
1867 | { | |
1868 | XTMPL (elem->data, 3) = | |
1869 | alter_output_for_subst_insn (elem->data, alternatives_subst); | |
1870 | alter_attrs_for_subst_insn (elem, alternatives_subst); | |
1871 | } | |
1872 | ||
1873 | /* Recalculate condition, joining conditions from original and | |
1874 | DEFINE_SUBST input patterns. */ | |
b78027d1 DM |
1875 | XSTR (elem->data, 2) |
1876 | = rtx_reader_ptr->join_c_conditions (XSTR (subst_elem->data, 2), | |
1877 | XSTR (elem->data, 2)); | |
477c104e MK |
1878 | /* Mark that subst was applied by changing attribute from "yes" |
1879 | to "no". */ | |
1880 | change_subst_attribute (elem, subst_elem, subst_false); | |
1881 | } | |
1882 | ||
1883 | /* If ELEM contains a subst attribute with value "yes", then we | |
1884 | expected that a subst would be applied, but it wasn't - so, | |
1885 | we need to remove that elementto avoid duplicating. */ | |
1886 | for (subst_elem = define_subst_queue; | |
1887 | subst_elem; subst_elem = subst_elem->next) | |
1888 | { | |
1889 | if (has_subst_attribute (elem, subst_elem)) | |
1890 | { | |
1891 | remove_from_queue (elem, &queue); | |
1892 | return; | |
1893 | } | |
1894 | } | |
1895 | } | |
1896 | ||
1897 | /* This is a subroutine of mark_operands_used_in_match_dup. | |
1898 | This routine is marks all MATCH_OPERANDs inside PATTERN as occupied. */ | |
1899 | static void | |
1900 | mark_operands_from_match_dup (rtx pattern) | |
1901 | { | |
1902 | const char *fmt; | |
1903 | int i, j, len, opno; | |
1904 | ||
1905 | if (GET_CODE (pattern) == MATCH_OPERAND | |
1906 | || GET_CODE (pattern) == MATCH_OPERATOR | |
1907 | || GET_CODE (pattern) == MATCH_PARALLEL) | |
1908 | { | |
1909 | opno = XINT (pattern, 0); | |
1910 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
1911 | used_operands_numbers [opno] = 1; | |
1912 | } | |
1913 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
1914 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
1915 | for (i = 0; i < len; i++) | |
1916 | { | |
1917 | switch (fmt[i]) | |
1918 | { | |
1919 | case 'e': case 'u': | |
1920 | mark_operands_from_match_dup (XEXP (pattern, i)); | |
1921 | break; | |
1922 | case 'E': | |
1923 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1924 | mark_operands_from_match_dup (XVECEXP (pattern, i, j)); | |
1925 | break; | |
1926 | } | |
1927 | } | |
1928 | } | |
1929 | ||
a7ba15ca | 1930 | /* This is a subroutine of adjust_operands_numbers. |
477c104e MK |
1931 | It goes through all expressions in PATTERN and when MATCH_DUP is |
1932 | met, all MATCH_OPERANDs inside it is marked as occupied. The | |
1933 | process of marking is done by routin mark_operands_from_match_dup. */ | |
1934 | static void | |
1935 | mark_operands_used_in_match_dup (rtx pattern) | |
1936 | { | |
1937 | const char *fmt; | |
1938 | int i, j, len, opno; | |
1939 | ||
1940 | if (GET_CODE (pattern) == MATCH_DUP) | |
1941 | { | |
1942 | opno = XINT (pattern, 0); | |
1943 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
1944 | mark_operands_from_match_dup (operand_data[opno]); | |
1945 | return; | |
1946 | } | |
1947 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
1948 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
1949 | for (i = 0; i < len; i++) | |
1950 | { | |
1951 | switch (fmt[i]) | |
1952 | { | |
1953 | case 'e': case 'u': | |
1954 | mark_operands_used_in_match_dup (XEXP (pattern, i)); | |
1955 | break; | |
1956 | case 'E': | |
1957 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1958 | mark_operands_used_in_match_dup (XVECEXP (pattern, i, j)); | |
1959 | break; | |
1960 | } | |
1961 | } | |
1962 | } | |
1963 | ||
1964 | /* This is subroutine of renumerate_operands_in_pattern. | |
1965 | It finds first not-occupied operand-index. */ | |
1966 | static int | |
1967 | find_first_unused_number_of_operand () | |
1968 | { | |
1969 | int i; | |
1970 | for (i = 0; i < MAX_OPERANDS; i++) | |
1971 | if (!used_operands_numbers[i]) | |
1972 | return i; | |
1973 | return MAX_OPERANDS; | |
1974 | } | |
1975 | ||
a7ba15ca AK |
1976 | /* This is subroutine of adjust_operands_numbers. |
1977 | It visits all expressions in PATTERN and assigns not-occupied | |
1978 | operand indexes to MATCH_OPERANDs and MATCH_OPERATORs of this | |
1979 | PATTERN. */ | |
477c104e MK |
1980 | static void |
1981 | renumerate_operands_in_pattern (rtx pattern) | |
1982 | { | |
1983 | const char *fmt; | |
1984 | enum rtx_code code; | |
1985 | int i, j, len, new_opno; | |
1986 | code = GET_CODE (pattern); | |
1987 | ||
1988 | if (code == MATCH_OPERAND | |
1989 | || code == MATCH_OPERATOR) | |
1990 | { | |
1991 | new_opno = find_first_unused_number_of_operand (); | |
1992 | gcc_assert (new_opno >= 0 && new_opno < MAX_OPERANDS); | |
1993 | XINT (pattern, 0) = new_opno; | |
1994 | used_operands_numbers [new_opno] = 1; | |
1995 | } | |
1996 | ||
1997 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
1998 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
1999 | for (i = 0; i < len; i++) | |
2000 | { | |
2001 | switch (fmt[i]) | |
2002 | { | |
2003 | case 'e': case 'u': | |
2004 | renumerate_operands_in_pattern (XEXP (pattern, i)); | |
2005 | break; | |
2006 | case 'E': | |
2007 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
2008 | renumerate_operands_in_pattern (XVECEXP (pattern, i, j)); | |
2009 | break; | |
2010 | } | |
2011 | } | |
2012 | } | |
2013 | ||
a7ba15ca AK |
2014 | /* If output pattern of define_subst contains MATCH_DUP, then this |
2015 | expression would be replaced with the pattern, matched with | |
2016 | MATCH_OPERAND from input pattern. This pattern could contain any | |
2017 | number of MATCH_OPERANDs, MATCH_OPERATORs etc., so it's possible | |
2018 | that a MATCH_OPERAND from output_pattern (if any) would have the | |
2019 | same number, as MATCH_OPERAND from copied pattern. To avoid such | |
2020 | indexes overlapping, we assign new indexes to MATCH_OPERANDs, | |
2021 | laying in the output pattern outside of MATCH_DUPs. */ | |
2022 | static rtx | |
2023 | adjust_operands_numbers (rtx pattern) | |
2024 | { | |
2025 | mark_operands_used_in_match_dup (pattern); | |
2026 | ||
2027 | renumerate_operands_in_pattern (pattern); | |
2028 | ||
2029 | return pattern; | |
2030 | } | |
477c104e MK |
2031 | |
2032 | /* Generate RTL expression | |
2033 | (match_dup OPNO) | |
2034 | */ | |
2035 | static rtx | |
2036 | generate_match_dup (int opno) | |
2037 | { | |
2038 | rtx return_rtx = rtx_alloc (MATCH_DUP); | |
2039 | PUT_CODE (return_rtx, MATCH_DUP); | |
2040 | XINT (return_rtx, 0) = opno; | |
2041 | return return_rtx; | |
2042 | } | |
2043 | ||
2044 | /* This routine checks all match_operands in PATTERN and if some of | |
2045 | have the same index, it replaces all of them except the first one to | |
2046 | match_dup. | |
2047 | Usually, match_operands with the same indexes are forbidden, but | |
2048 | after define_subst copy an RTL-expression from original template, | |
2049 | indexes of existed and just-copied match_operands could coincide. | |
2050 | To fix it, we replace one of them with match_dup. */ | |
2051 | static rtx | |
2052 | replace_duplicating_operands_in_pattern (rtx pattern) | |
2053 | { | |
2054 | const char *fmt; | |
2055 | int i, j, len, opno; | |
2056 | rtx mdup; | |
2057 | ||
2058 | if (GET_CODE (pattern) == MATCH_OPERAND) | |
2059 | { | |
2060 | opno = XINT (pattern, 0); | |
2061 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
2062 | if (match_operand_entries_in_pattern[opno] == NULL) | |
2063 | { | |
2064 | match_operand_entries_in_pattern[opno] = pattern; | |
2065 | return NULL; | |
2066 | } | |
2067 | else | |
2068 | { | |
2069 | /* Compare predicates before replacing with match_dup. */ | |
2070 | if (strcmp (XSTR (pattern, 1), | |
2071 | XSTR (match_operand_entries_in_pattern[opno], 1))) | |
2072 | { | |
2073 | error ("duplicated match_operands with different predicates were" | |
2074 | " found."); | |
2075 | return NULL; | |
2076 | } | |
2077 | return generate_match_dup (opno); | |
2078 | } | |
2079 | } | |
2080 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
2081 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
2082 | for (i = 0; i < len; i++) | |
2083 | { | |
2084 | switch (fmt[i]) | |
2085 | { | |
2086 | case 'e': case 'u': | |
2087 | mdup = replace_duplicating_operands_in_pattern (XEXP (pattern, i)); | |
2088 | if (mdup) | |
2089 | XEXP (pattern, i) = mdup; | |
2090 | break; | |
2091 | case 'E': | |
2092 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
2093 | { | |
2094 | mdup = | |
2095 | replace_duplicating_operands_in_pattern (XVECEXP | |
2096 | (pattern, i, j)); | |
2097 | if (mdup) | |
2098 | XVECEXP (pattern, i, j) = mdup; | |
2099 | } | |
2100 | break; | |
2101 | } | |
2102 | } | |
2103 | return NULL; | |
2104 | } | |
2105 | ||
2106 | /* The routine modifies given input PATTERN of define_subst, replacing | |
2107 | MATCH_DUP and MATCH_OP_DUP with operands from define_insn original | |
2108 | pattern, whose operands are stored in OPERAND_DATA array. | |
2109 | It also duplicates constraints in operands - constraints from | |
2110 | define_insn operands are duplicated N_SUBST_ALT times, constraints | |
2111 | from define_subst operands are duplicated N_ALT times. | |
2112 | After the duplication, returned output rtl-pattern contains every | |
2113 | combination of input constraints Vs constraints from define_subst | |
2114 | output. */ | |
2115 | static rtx | |
2116 | subst_dup (rtx pattern, int n_alt, int n_subst_alt) | |
2117 | { | |
2118 | const char *fmt; | |
2119 | enum rtx_code code; | |
2120 | int i, j, len, opno; | |
2121 | ||
2122 | code = GET_CODE (pattern); | |
2123 | switch (code) | |
2124 | { | |
2125 | case MATCH_DUP: | |
2126 | case MATCH_OP_DUP: | |
2127 | opno = XINT (pattern, 0); | |
2128 | ||
2129 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
2130 | ||
2131 | if (operand_data[opno]) | |
2132 | { | |
2133 | pattern = copy_rtx (operand_data[opno]); | |
2134 | ||
2135 | /* Duplicate constraints. */ | |
2136 | pattern = alter_constraints (pattern, n_subst_alt, | |
2137 | duplicate_alternatives); | |
2138 | } | |
2139 | break; | |
2140 | ||
2141 | default: | |
2142 | break; | |
2143 | } | |
2144 | ||
2145 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
2146 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
2147 | for (i = 0; i < len; i++) | |
2148 | { | |
2149 | switch (fmt[i]) | |
2150 | { | |
2151 | case 'e': case 'u': | |
2152 | if (code != MATCH_DUP && code != MATCH_OP_DUP) | |
2153 | XEXP (pattern, i) = subst_dup (XEXP (pattern, i), | |
2154 | n_alt, n_subst_alt); | |
2155 | break; | |
2156 | case 'V': | |
2157 | if (XVEC (pattern, i) == NULL) | |
2158 | break; | |
191816a3 | 2159 | /* FALLTHRU */ |
477c104e | 2160 | case 'E': |
c7b3b99f PCC |
2161 | if (code != MATCH_DUP && code != MATCH_OP_DUP) |
2162 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
477c104e MK |
2163 | XVECEXP (pattern, i, j) = subst_dup (XVECEXP (pattern, i, j), |
2164 | n_alt, n_subst_alt); | |
2165 | break; | |
2166 | ||
9fccb335 | 2167 | case 'i': case 'r': case 'w': case '0': case 's': case 'S': case 'T': |
477c104e MK |
2168 | break; |
2169 | ||
2170 | default: | |
2171 | gcc_unreachable (); | |
2172 | } | |
2173 | } | |
2174 | return pattern; | |
2175 | } | |
2176 | ||
3262c1f5 RH |
2177 | /* If we have any DEFINE_COND_EXEC patterns, expand the DEFINE_INSN |
2178 | patterns appropriately. */ | |
2179 | ||
2180 | static void | |
3d7aafde | 2181 | process_define_cond_exec (void) |
3262c1f5 RH |
2182 | { |
2183 | struct queue_elem *elem; | |
2184 | ||
2185 | identify_predicable_attribute (); | |
bb933490 | 2186 | if (have_error) |
3262c1f5 RH |
2187 | return; |
2188 | ||
2189 | for (elem = define_cond_exec_queue; elem ; elem = elem->next) | |
2190 | process_one_cond_exec (elem); | |
2191 | } | |
477c104e MK |
2192 | |
2193 | /* If we have any DEFINE_SUBST patterns, expand DEFINE_INSN and | |
2194 | DEFINE_EXPAND patterns appropriately. */ | |
2195 | ||
2196 | static void | |
2197 | process_define_subst (void) | |
2198 | { | |
2199 | struct queue_elem *elem, *elem_attr; | |
2200 | ||
2201 | /* Check if each define_subst has corresponding define_subst_attr. */ | |
2202 | for (elem = define_subst_queue; elem ; elem = elem->next) | |
2203 | { | |
2204 | for (elem_attr = define_subst_attr_queue; | |
2205 | elem_attr; | |
2206 | elem_attr = elem_attr->next) | |
2207 | if (strcmp (XSTR (elem->data, 0), XSTR (elem_attr->data, 1)) == 0) | |
2208 | goto found; | |
2209 | ||
cc472607 RS |
2210 | error_at (elem->loc, |
2211 | "%s: `define_subst' must have at least one " | |
2212 | "corresponding `define_subst_attr'", | |
2213 | XSTR (elem->data, 0)); | |
21c0a521 DM |
2214 | return; |
2215 | ||
477c104e MK |
2216 | found: |
2217 | continue; | |
2218 | } | |
2219 | ||
2220 | for (elem = define_insn_queue; elem ; elem = elem->next) | |
2221 | process_substs_on_one_elem (elem, define_insn_queue); | |
2222 | for (elem = other_queue; elem ; elem = elem->next) | |
2223 | { | |
2224 | if (GET_CODE (elem->data) != DEFINE_EXPAND) | |
2225 | continue; | |
2226 | process_substs_on_one_elem (elem, other_queue); | |
2227 | } | |
2228 | } | |
600ab3fc | 2229 | \f |
812b1403 DM |
2230 | /* A subclass of rtx_reader which reads .md files and calls process_rtx on |
2231 | the top-level elements. */ | |
04d8aa70 | 2232 | |
812b1403 DM |
2233 | class gen_reader : public rtx_reader |
2234 | { | |
2235 | public: | |
51b86113 | 2236 | gen_reader () : rtx_reader (false) {} |
812b1403 DM |
2237 | void handle_unknown_directive (file_location, const char *); |
2238 | }; | |
2239 | ||
2240 | void | |
2241 | gen_reader::handle_unknown_directive (file_location loc, const char *rtx_name) | |
04d8aa70 | 2242 | { |
6b8068d6 TS |
2243 | auto_vec<rtx, 32> subrtxs; |
2244 | if (!read_rtx (rtx_name, &subrtxs)) | |
2245 | return; | |
04d8aa70 | 2246 | |
6b8068d6 TS |
2247 | rtx x; |
2248 | unsigned int i; | |
2249 | FOR_EACH_VEC_ELT (subrtxs, i, x) | |
cc472607 | 2250 | process_rtx (x, loc); |
04d8aa70 AM |
2251 | } |
2252 | ||
64aad689 AK |
2253 | /* Comparison function for the mnemonic hash table. */ |
2254 | ||
2255 | static int | |
2256 | htab_eq_string (const void *s1, const void *s2) | |
2257 | { | |
2258 | return strcmp ((const char*)s1, (const char*)s2) == 0; | |
2259 | } | |
2260 | ||
2261 | /* Add mnemonic STR with length LEN to the mnemonic hash table | |
2262 | MNEMONIC_HTAB. A trailing zero end character is appendend to STR | |
2263 | and a permanent heap copy of STR is created. */ | |
2264 | ||
2265 | static void | |
c240b3e0 | 2266 | add_mnemonic_string (htab_t mnemonic_htab, const char *str, size_t len) |
64aad689 AK |
2267 | { |
2268 | char *new_str; | |
2269 | void **slot; | |
2270 | char *str_zero = (char*)alloca (len + 1); | |
2271 | ||
2272 | memcpy (str_zero, str, len); | |
2273 | str_zero[len] = '\0'; | |
2274 | ||
2275 | slot = htab_find_slot (mnemonic_htab, str_zero, INSERT); | |
2276 | ||
2277 | if (*slot) | |
2278 | return; | |
2279 | ||
2280 | /* Not found; create a permanent copy and add it to the hash table. */ | |
2281 | new_str = XNEWVAR (char, len + 1); | |
2282 | memcpy (new_str, str_zero, len + 1); | |
2283 | *slot = new_str; | |
2284 | } | |
2285 | ||
2286 | /* Scan INSN for mnemonic strings and add them to the mnemonic hash | |
2287 | table in MNEMONIC_HTAB. | |
2288 | ||
2289 | The mnemonics cannot be found if they are emitted using C code. | |
2290 | ||
2291 | If a mnemonic string contains ';' or a newline the string assumed | |
2292 | to consist of more than a single instruction. The attribute value | |
2293 | will then be set to the user defined default value. */ | |
2294 | ||
2295 | static void | |
2296 | gen_mnemonic_setattr (htab_t mnemonic_htab, rtx insn) | |
2297 | { | |
2298 | const char *template_code, *cp; | |
2299 | int i; | |
2300 | int vec_len; | |
2301 | rtx set_attr; | |
2302 | char *attr_name; | |
2303 | rtvec new_vec; | |
b78027d1 | 2304 | struct obstack *string_obstack = rtx_reader_ptr->get_string_obstack (); |
64aad689 AK |
2305 | |
2306 | template_code = XTMPL (insn, 3); | |
2307 | ||
2308 | /* Skip patterns which use C code to emit the template. */ | |
2309 | if (template_code[0] == '*') | |
2310 | return; | |
2311 | ||
2312 | if (template_code[0] == '@') | |
2313 | cp = &template_code[1]; | |
2314 | else | |
2315 | cp = &template_code[0]; | |
2316 | ||
2317 | for (i = 0; *cp; ) | |
2318 | { | |
2319 | const char *ep, *sp; | |
c240b3e0 | 2320 | size_t size = 0; |
64aad689 AK |
2321 | |
2322 | while (ISSPACE (*cp)) | |
2323 | cp++; | |
2324 | ||
2325 | for (ep = sp = cp; !IS_VSPACE (*ep) && *ep != '\0'; ++ep) | |
2326 | if (!ISSPACE (*ep)) | |
2327 | sp = ep + 1; | |
2328 | ||
2329 | if (i > 0) | |
b78027d1 | 2330 | obstack_1grow (string_obstack, ','); |
64aad689 AK |
2331 | |
2332 | while (cp < sp && ((*cp >= '0' && *cp <= '9') | |
2333 | || (*cp >= 'a' && *cp <= 'z'))) | |
2334 | ||
2335 | { | |
b78027d1 | 2336 | obstack_1grow (string_obstack, *cp); |
64aad689 AK |
2337 | cp++; |
2338 | size++; | |
2339 | } | |
2340 | ||
2341 | while (cp < sp) | |
2342 | { | |
2343 | if (*cp == ';' || (*cp == '\\' && cp[1] == 'n')) | |
2344 | { | |
2345 | /* Don't set a value if there are more than one | |
2346 | instruction in the string. */ | |
b78027d1 | 2347 | obstack_blank_fast (string_obstack, -size); |
64aad689 AK |
2348 | size = 0; |
2349 | ||
2350 | cp = sp; | |
2351 | break; | |
2352 | } | |
2353 | cp++; | |
2354 | } | |
2355 | if (size == 0) | |
b78027d1 | 2356 | obstack_1grow (string_obstack, '*'); |
64aad689 AK |
2357 | else |
2358 | add_mnemonic_string (mnemonic_htab, | |
b78027d1 | 2359 | (char *) obstack_next_free (string_obstack) - size, |
64aad689 AK |
2360 | size); |
2361 | i++; | |
2362 | } | |
2363 | ||
2364 | /* An insn definition might emit an empty string. */ | |
b78027d1 | 2365 | if (obstack_object_size (string_obstack) == 0) |
64aad689 AK |
2366 | return; |
2367 | ||
b78027d1 | 2368 | obstack_1grow (string_obstack, '\0'); |
64aad689 AK |
2369 | |
2370 | set_attr = rtx_alloc (SET_ATTR); | |
b78027d1 | 2371 | XSTR (set_attr, 1) = XOBFINISH (string_obstack, char *); |
64aad689 AK |
2372 | attr_name = XNEWVAR (char, strlen (MNEMONIC_ATTR_NAME) + 1); |
2373 | strcpy (attr_name, MNEMONIC_ATTR_NAME); | |
2374 | XSTR (set_attr, 0) = attr_name; | |
2375 | ||
2376 | if (!XVEC (insn, 4)) | |
2377 | vec_len = 0; | |
2378 | else | |
2379 | vec_len = XVECLEN (insn, 4); | |
2380 | ||
2381 | new_vec = rtvec_alloc (vec_len + 1); | |
2382 | for (i = 0; i < vec_len; i++) | |
2383 | RTVEC_ELT (new_vec, i) = XVECEXP (insn, 4, i); | |
2384 | RTVEC_ELT (new_vec, vec_len) = set_attr; | |
2385 | XVEC (insn, 4) = new_vec; | |
2386 | } | |
2387 | ||
2388 | /* This function is called for the elements in the mnemonic hashtable | |
2389 | and generates a comma separated list of the mnemonics. */ | |
2390 | ||
2391 | static int | |
2392 | mnemonic_htab_callback (void **slot, void *info ATTRIBUTE_UNUSED) | |
2393 | { | |
b78027d1 DM |
2394 | struct obstack *string_obstack = rtx_reader_ptr->get_string_obstack (); |
2395 | ||
2396 | obstack_grow (string_obstack, (char*) *slot, strlen ((char*) *slot)); | |
2397 | obstack_1grow (string_obstack, ','); | |
64aad689 AK |
2398 | return 1; |
2399 | } | |
2400 | ||
2401 | /* Generate (set_attr "mnemonic" "..") RTXs and append them to every | |
2402 | insn definition in case the back end requests it by defining the | |
2403 | mnemonic attribute. The values for the attribute will be extracted | |
2404 | from the output patterns of the insn definitions as far as | |
2405 | possible. */ | |
2406 | ||
2407 | static void | |
2408 | gen_mnemonic_attr (void) | |
2409 | { | |
2410 | struct queue_elem *elem; | |
2411 | rtx mnemonic_attr = NULL; | |
2412 | htab_t mnemonic_htab; | |
2413 | const char *str, *p; | |
2414 | int i; | |
b78027d1 | 2415 | struct obstack *string_obstack = rtx_reader_ptr->get_string_obstack (); |
64aad689 AK |
2416 | |
2417 | if (have_error) | |
2418 | return; | |
2419 | ||
2420 | /* Look for the DEFINE_ATTR for `mnemonic'. */ | |
2421 | for (elem = define_attr_queue; elem != *define_attr_tail; elem = elem->next) | |
2422 | if (GET_CODE (elem->data) == DEFINE_ATTR | |
2423 | && strcmp (XSTR (elem->data, 0), MNEMONIC_ATTR_NAME) == 0) | |
2424 | { | |
2425 | mnemonic_attr = elem->data; | |
2426 | break; | |
2427 | } | |
2428 | ||
2429 | /* A (define_attr "mnemonic" "...") indicates that the back-end | |
2430 | wants a mnemonic attribute to be generated. */ | |
2431 | if (!mnemonic_attr) | |
2432 | return; | |
2433 | ||
2434 | mnemonic_htab = htab_create_alloc (MNEMONIC_HTAB_SIZE, htab_hash_string, | |
2435 | htab_eq_string, 0, xcalloc, free); | |
2436 | ||
2437 | for (elem = define_insn_queue; elem; elem = elem->next) | |
2438 | { | |
2439 | rtx insn = elem->data; | |
2440 | bool found = false; | |
2441 | ||
2442 | /* Check if the insn definition already has | |
5db40447 | 2443 | (set_attr "mnemonic" ...) or (set (attr "mnemonic") ...). */ |
64aad689 AK |
2444 | if (XVEC (insn, 4)) |
2445 | for (i = 0; i < XVECLEN (insn, 4); i++) | |
5db40447 AK |
2446 | { |
2447 | rtx set_attr = XVECEXP (insn, 4, i); | |
2448 | ||
2449 | switch (GET_CODE (set_attr)) | |
2450 | { | |
2451 | case SET_ATTR: | |
2452 | case SET_ATTR_ALTERNATIVE: | |
2453 | if (strcmp (XSTR (set_attr, 0), MNEMONIC_ATTR_NAME) == 0) | |
2454 | found = true; | |
2455 | break; | |
2456 | case SET: | |
2457 | if (GET_CODE (SET_DEST (set_attr)) == ATTR | |
2458 | && strcmp (XSTR (SET_DEST (set_attr), 0), | |
2459 | MNEMONIC_ATTR_NAME) == 0) | |
2460 | found = true; | |
2461 | break; | |
2462 | default: | |
2463 | break; | |
2464 | } | |
2465 | } | |
64aad689 AK |
2466 | |
2467 | if (!found) | |
2468 | gen_mnemonic_setattr (mnemonic_htab, insn); | |
2469 | } | |
2470 | ||
2471 | /* Add the user defined values to the hash table. */ | |
2472 | str = XSTR (mnemonic_attr, 1); | |
2473 | while ((p = scan_comma_elt (&str)) != NULL) | |
2474 | add_mnemonic_string (mnemonic_htab, p, str - p); | |
2475 | ||
2476 | htab_traverse (mnemonic_htab, mnemonic_htab_callback, NULL); | |
2477 | ||
2478 | /* Replace the last ',' with the zero end character. */ | |
b78027d1 DM |
2479 | *((char *) obstack_next_free (string_obstack) - 1) = '\0'; |
2480 | XSTR (mnemonic_attr, 1) = XOBFINISH (string_obstack, char *); | |
64aad689 AK |
2481 | } |
2482 | ||
477c104e MK |
2483 | /* Check if there are DEFINE_ATTRs with the same name. */ |
2484 | static void | |
2485 | check_define_attr_duplicates () | |
2486 | { | |
2487 | struct queue_elem *elem; | |
2488 | htab_t attr_htab; | |
2489 | char * attr_name; | |
2490 | void **slot; | |
2491 | ||
2492 | attr_htab = htab_create (500, htab_hash_string, htab_eq_string, NULL); | |
2493 | ||
2494 | for (elem = define_attr_queue; elem; elem = elem->next) | |
2495 | { | |
2496 | attr_name = xstrdup (XSTR (elem->data, 0)); | |
2497 | ||
2498 | slot = htab_find_slot (attr_htab, attr_name, INSERT); | |
2499 | ||
2500 | /* Duplicate. */ | |
2501 | if (*slot) | |
2502 | { | |
cc472607 | 2503 | error_at (elem->loc, "redefinition of attribute '%s'", attr_name); |
477c104e MK |
2504 | htab_delete (attr_htab); |
2505 | return; | |
2506 | } | |
2507 | ||
2508 | *slot = attr_name; | |
2509 | } | |
2510 | ||
2511 | htab_delete (attr_htab); | |
2512 | } | |
2513 | ||
04d8aa70 AM |
2514 | /* The entry point for initializing the reader. */ |
2515 | ||
812b1403 | 2516 | rtx_reader * |
66b0fe8f | 2517 | init_rtx_reader_args_cb (int argc, const char **argv, |
600ab3fc | 2518 | bool (*parse_opt) (const char *)) |
04d8aa70 | 2519 | { |
1c7352cd ZW |
2520 | /* Prepare to read input. */ |
2521 | condition_table = htab_create (500, hash_c_test, cmp_c_test, NULL); | |
e543e219 | 2522 | init_predicate_table (); |
3916d6d8 | 2523 | obstack_init (rtl_obstack); |
e714561a SB |
2524 | |
2525 | /* Start at 1, to make 0 available for CODE_FOR_nothing. */ | |
72a35f93 RS |
2526 | insn_sequence_num = 1; |
2527 | ||
2528 | /* These sequences are not used as indices, so can start at 1 also. */ | |
2529 | split_sequence_num = 1; | |
2530 | peephole2_sequence_num = 1; | |
1c7352cd | 2531 | |
812b1403 DM |
2532 | gen_reader *reader = new gen_reader (); |
2533 | reader->read_md_files (argc, argv, parse_opt); | |
3262c1f5 | 2534 | |
477c104e MK |
2535 | if (define_attr_queue != NULL) |
2536 | check_define_attr_duplicates (); | |
2537 | ||
3262c1f5 RH |
2538 | /* Process define_cond_exec patterns. */ |
2539 | if (define_cond_exec_queue != NULL) | |
2540 | process_define_cond_exec (); | |
2541 | ||
477c104e MK |
2542 | /* Process define_subst patterns. */ |
2543 | if (define_subst_queue != NULL) | |
2544 | process_define_subst (); | |
2545 | ||
64aad689 AK |
2546 | if (define_attr_queue != NULL) |
2547 | gen_mnemonic_attr (); | |
2548 | ||
812b1403 DM |
2549 | if (have_error) |
2550 | { | |
2551 | delete reader; | |
2552 | return NULL; | |
2553 | } | |
2554 | ||
2555 | return reader; | |
3262c1f5 RH |
2556 | } |
2557 | ||
f9942f4e ZW |
2558 | /* Programs that don't have their own options can use this entry point |
2559 | instead. */ | |
812b1403 | 2560 | rtx_reader * |
66b0fe8f | 2561 | init_rtx_reader_args (int argc, const char **argv) |
f9942f4e | 2562 | { |
600ab3fc | 2563 | return init_rtx_reader_args_cb (argc, argv, 0); |
f9942f4e ZW |
2564 | } |
2565 | \f | |
5d2d3e43 RS |
2566 | /* Try to read a single rtx from the file. Return true on success, |
2567 | describing it in *INFO. */ | |
3262c1f5 | 2568 | |
5d2d3e43 RS |
2569 | bool |
2570 | read_md_rtx (md_rtx_info *info) | |
3262c1f5 | 2571 | { |
72a35f93 RS |
2572 | int truth, *counter; |
2573 | rtx def; | |
3262c1f5 | 2574 | |
2199e5fa ZW |
2575 | /* Discard insn patterns which we know can never match (because |
2576 | their C test is provably always false). If insn_elision is | |
2577 | false, our caller needs to see all the patterns. Note that the | |
2578 | elided patterns are never counted by the sequence numbering; it | |
1a84c183 | 2579 | is the caller's responsibility, when insn_elision is false, not |
2199e5fa | 2580 | to use elided pattern numbers for anything. */ |
72a35f93 RS |
2581 | do |
2582 | { | |
2583 | struct queue_elem **queue, *elem; | |
2584 | ||
2585 | /* Read all patterns from a given queue before moving on to the next. */ | |
2586 | if (define_attr_queue != NULL) | |
2587 | queue = &define_attr_queue; | |
2588 | else if (define_pred_queue != NULL) | |
2589 | queue = &define_pred_queue; | |
2590 | else if (define_insn_queue != NULL) | |
2591 | queue = &define_insn_queue; | |
2592 | else if (other_queue != NULL) | |
2593 | queue = &other_queue; | |
2594 | else | |
2595 | return false; | |
2596 | ||
2597 | elem = *queue; | |
2598 | *queue = elem->next; | |
2599 | def = elem->data; | |
2600 | info->def = def; | |
2601 | info->loc = elem->loc; | |
2602 | free (elem); | |
2603 | ||
2604 | truth = maybe_eval_c_test (get_c_test (def)); | |
2605 | } | |
2606 | while (truth == 0 && insn_elision); | |
2607 | ||
2608 | /* Perform code-specific processing and pick the appropriate sequence | |
2609 | number counter. */ | |
2610 | switch (GET_CODE (def)) | |
c88c0d42 | 2611 | { |
3262c1f5 RH |
2612 | case DEFINE_INSN: |
2613 | case DEFINE_EXPAND: | |
72a35f93 | 2614 | /* insn_sequence_num is used here so the name table will match caller's |
0458fe77 | 2615 | idea of insn numbering, whether or not elision is active. */ |
72a35f93 RS |
2616 | record_insn_name (insn_sequence_num, XSTR (def, 0)); |
2617 | ||
2618 | /* Fall through. */ | |
2619 | case DEFINE_PEEPHOLE: | |
2620 | counter = &insn_sequence_num; | |
2199e5fa ZW |
2621 | break; |
2622 | ||
3262c1f5 | 2623 | case DEFINE_SPLIT: |
72a35f93 RS |
2624 | counter = &split_sequence_num; |
2625 | break; | |
2626 | ||
3262c1f5 | 2627 | case DEFINE_PEEPHOLE2: |
72a35f93 | 2628 | counter = &peephole2_sequence_num; |
3262c1f5 RH |
2629 | break; |
2630 | ||
2631 | default: | |
72a35f93 | 2632 | counter = NULL; |
3262c1f5 | 2633 | break; |
c88c0d42 CP |
2634 | } |
2635 | ||
72a35f93 RS |
2636 | if (counter) |
2637 | { | |
2638 | info->index = *counter; | |
2639 | if (truth != 0) | |
2640 | *counter += 1; | |
2641 | } | |
2642 | else | |
2643 | info->index = -1; | |
2644 | ||
58d745ec RS |
2645 | if (!rtx_locs) |
2646 | rtx_locs = new hash_map <rtx, file_location>; | |
2647 | rtx_locs->put (info->def, info->loc); | |
2648 | ||
5d2d3e43 | 2649 | return true; |
c88c0d42 | 2650 | } |
9a5834ae | 2651 | |
58d745ec RS |
2652 | /* Return the file location of DEFINE_* rtx X, which was previously |
2653 | returned by read_md_rtx. */ | |
2654 | file_location | |
2655 | get_file_location (rtx x) | |
2656 | { | |
2657 | gcc_assert (rtx_locs); | |
2658 | file_location *entry = rtx_locs->get (x); | |
2659 | gcc_assert (entry); | |
2660 | return *entry; | |
2661 | } | |
2662 | ||
ba0ee63d RS |
2663 | /* Return the number of possible INSN_CODEs. Only meaningful once the |
2664 | whole file has been processed. */ | |
2665 | unsigned int | |
2666 | get_num_insn_codes () | |
2667 | { | |
72a35f93 | 2668 | return insn_sequence_num; |
ba0ee63d RS |
2669 | } |
2670 | ||
d1427a17 RS |
2671 | /* Return the C test that says whether definition rtx DEF can be used, |
2672 | or "" if it can be used unconditionally. */ | |
2673 | ||
2674 | const char * | |
2675 | get_c_test (rtx x) | |
2676 | { | |
2677 | switch (GET_CODE (x)) | |
2678 | { | |
2679 | case DEFINE_INSN: | |
2680 | case DEFINE_EXPAND: | |
2681 | case DEFINE_SUBST: | |
2682 | return XSTR (x, 2); | |
2683 | ||
2684 | case DEFINE_SPLIT: | |
2685 | case DEFINE_PEEPHOLE: | |
2686 | case DEFINE_PEEPHOLE2: | |
2687 | return XSTR (x, 1); | |
2688 | ||
2689 | default: | |
2690 | return ""; | |
2691 | } | |
2692 | } | |
2693 | ||
2199e5fa ZW |
2694 | /* Helper functions for insn elision. */ |
2695 | ||
2696 | /* Compute a hash function of a c_test structure, which is keyed | |
2697 | by its ->expr field. */ | |
2698 | hashval_t | |
3d7aafde | 2699 | hash_c_test (const void *x) |
2199e5fa ZW |
2700 | { |
2701 | const struct c_test *a = (const struct c_test *) x; | |
2702 | const unsigned char *base, *s = (const unsigned char *) a->expr; | |
2703 | hashval_t hash; | |
2704 | unsigned char c; | |
2705 | unsigned int len; | |
2706 | ||
2707 | base = s; | |
2708 | hash = 0; | |
2709 | ||
2710 | while ((c = *s++) != '\0') | |
2711 | { | |
2712 | hash += c + (c << 17); | |
2713 | hash ^= hash >> 2; | |
2714 | } | |
2715 | ||
2716 | len = s - base; | |
2717 | hash += len + (len << 17); | |
2718 | hash ^= hash >> 2; | |
2719 | ||
2720 | return hash; | |
2721 | } | |
2722 | ||
2723 | /* Compare two c_test expression structures. */ | |
2724 | int | |
3d7aafde | 2725 | cmp_c_test (const void *x, const void *y) |
2199e5fa ZW |
2726 | { |
2727 | const struct c_test *a = (const struct c_test *) x; | |
2728 | const struct c_test *b = (const struct c_test *) y; | |
2729 | ||
2730 | return !strcmp (a->expr, b->expr); | |
2731 | } | |
2732 | ||
2733 | /* Given a string representing a C test expression, look it up in the | |
2734 | condition_table and report whether or not its value is known | |
2735 | at compile time. Returns a tristate: 1 for known true, 0 for | |
2736 | known false, -1 for unknown. */ | |
2737 | int | |
3d7aafde | 2738 | maybe_eval_c_test (const char *expr) |
2199e5fa ZW |
2739 | { |
2740 | const struct c_test *test; | |
2741 | struct c_test dummy; | |
2742 | ||
52831d13 | 2743 | if (expr[0] == 0) |
2199e5fa ZW |
2744 | return 1; |
2745 | ||
2199e5fa | 2746 | dummy.expr = expr; |
5d038c4c | 2747 | test = (const struct c_test *)htab_find (condition_table, &dummy); |
1c7352cd ZW |
2748 | if (!test) |
2749 | return -1; | |
2199e5fa ZW |
2750 | return test->value; |
2751 | } | |
2752 | ||
1c7352cd ZW |
2753 | /* Record the C test expression EXPR in the condition_table, with |
2754 | value VAL. Duplicates clobber previous entries. */ | |
2755 | ||
2756 | void | |
2757 | add_c_test (const char *expr, int value) | |
2758 | { | |
2759 | struct c_test *test; | |
2760 | ||
2761 | if (expr[0] == 0) | |
2762 | return; | |
2763 | ||
2764 | test = XNEW (struct c_test); | |
2765 | test->expr = expr; | |
2766 | test->value = value; | |
2767 | ||
2768 | *(htab_find_slot (condition_table, test, INSERT)) = test; | |
2769 | } | |
2770 | ||
2771 | /* For every C test, call CALLBACK with two arguments: a pointer to | |
2772 | the condition structure and INFO. Stops when CALLBACK returns zero. */ | |
2773 | void | |
2774 | traverse_c_tests (htab_trav callback, void *info) | |
2775 | { | |
2776 | if (condition_table) | |
2777 | htab_traverse (condition_table, callback, info); | |
2778 | } | |
2779 | ||
e543e219 ZW |
2780 | /* Helper functions for define_predicate and define_special_predicate |
2781 | processing. Shared between genrecog.c and genpreds.c. */ | |
2782 | ||
2783 | static htab_t predicate_table; | |
2784 | struct pred_data *first_predicate; | |
2785 | static struct pred_data **last_predicate = &first_predicate; | |
2786 | ||
2787 | static hashval_t | |
2788 | hash_struct_pred_data (const void *ptr) | |
2789 | { | |
2790 | return htab_hash_string (((const struct pred_data *)ptr)->name); | |
2791 | } | |
2792 | ||
2793 | static int | |
2794 | eq_struct_pred_data (const void *a, const void *b) | |
2795 | { | |
2796 | return !strcmp (((const struct pred_data *)a)->name, | |
2797 | ((const struct pred_data *)b)->name); | |
2798 | } | |
2799 | ||
2800 | struct pred_data * | |
2801 | lookup_predicate (const char *name) | |
2802 | { | |
2803 | struct pred_data key; | |
2804 | key.name = name; | |
cceb1885 | 2805 | return (struct pred_data *) htab_find (predicate_table, &key); |
e543e219 ZW |
2806 | } |
2807 | ||
e663da80 RS |
2808 | /* Record that predicate PRED can accept CODE. */ |
2809 | ||
2810 | void | |
2811 | add_predicate_code (struct pred_data *pred, enum rtx_code code) | |
2812 | { | |
2813 | if (!pred->codes[code]) | |
2814 | { | |
2815 | pred->num_codes++; | |
2816 | pred->codes[code] = true; | |
2817 | ||
2818 | if (GET_RTX_CLASS (code) != RTX_CONST_OBJ) | |
2819 | pred->allows_non_const = true; | |
2820 | ||
2821 | if (code != REG | |
2822 | && code != SUBREG | |
2823 | && code != MEM | |
2824 | && code != CONCAT | |
2825 | && code != PARALLEL | |
a8fd4225 GS |
2826 | && code != STRICT_LOW_PART |
2827 | && code != SCRATCH) | |
e663da80 RS |
2828 | pred->allows_non_lvalue = true; |
2829 | ||
2830 | if (pred->num_codes == 1) | |
2831 | pred->singleton = code; | |
2832 | else if (pred->num_codes == 2) | |
2833 | pred->singleton = UNKNOWN; | |
2834 | } | |
2835 | } | |
2836 | ||
e543e219 ZW |
2837 | void |
2838 | add_predicate (struct pred_data *pred) | |
2839 | { | |
2840 | void **slot = htab_find_slot (predicate_table, pred, INSERT); | |
2841 | if (*slot) | |
2842 | { | |
2843 | error ("duplicate predicate definition for '%s'", pred->name); | |
2844 | return; | |
2845 | } | |
2846 | *slot = pred; | |
2847 | *last_predicate = pred; | |
2848 | last_predicate = &pred->next; | |
2849 | } | |
2850 | ||
2851 | /* This array gives the initial content of the predicate table. It | |
c2acaf06 | 2852 | has entries for all predicates defined in recog.c. */ |
e543e219 | 2853 | |
ebce9df7 | 2854 | struct std_pred_table |
e543e219 ZW |
2855 | { |
2856 | const char *name; | |
ebce9df7 | 2857 | bool special; |
e663da80 | 2858 | bool allows_const_p; |
e543e219 ZW |
2859 | RTX_CODE codes[NUM_RTX_CODE]; |
2860 | }; | |
2861 | ||
ebce9df7 | 2862 | static const struct std_pred_table std_preds[] = { |
e663da80 | 2863 | {"general_operand", false, true, {SUBREG, REG, MEM}}, |
0060d7d7 RS |
2864 | {"address_operand", true, true, {SUBREG, REG, MEM, PLUS, MINUS, MULT, |
2865 | ZERO_EXTEND, SIGN_EXTEND, AND}}, | |
e663da80 RS |
2866 | {"register_operand", false, false, {SUBREG, REG}}, |
2867 | {"pmode_register_operand", true, false, {SUBREG, REG}}, | |
2868 | {"scratch_operand", false, false, {SCRATCH, REG}}, | |
81f40b79 | 2869 | {"immediate_operand", false, true, {UNKNOWN}}, |
e663da80 | 2870 | {"const_int_operand", false, false, {CONST_INT}}, |
807e902e KZ |
2871 | #if TARGET_SUPPORTS_WIDE_INT |
2872 | {"const_scalar_int_operand", false, false, {CONST_INT, CONST_WIDE_INT}}, | |
2873 | {"const_double_operand", false, false, {CONST_DOUBLE}}, | |
2874 | #else | |
e663da80 | 2875 | {"const_double_operand", false, false, {CONST_INT, CONST_DOUBLE}}, |
807e902e | 2876 | #endif |
e663da80 RS |
2877 | {"nonimmediate_operand", false, false, {SUBREG, REG, MEM}}, |
2878 | {"nonmemory_operand", false, true, {SUBREG, REG}}, | |
2879 | {"push_operand", false, false, {MEM}}, | |
2880 | {"pop_operand", false, false, {MEM}}, | |
2881 | {"memory_operand", false, false, {SUBREG, MEM}}, | |
2882 | {"indirect_operand", false, false, {SUBREG, MEM}}, | |
c6963675 PB |
2883 | {"ordered_comparison_operator", false, false, {EQ, NE, |
2884 | LE, LT, GE, GT, | |
2885 | LEU, LTU, GEU, GTU}}, | |
e663da80 RS |
2886 | {"comparison_operator", false, false, {EQ, NE, |
2887 | LE, LT, GE, GT, | |
2888 | LEU, LTU, GEU, GTU, | |
2889 | UNORDERED, ORDERED, | |
2890 | UNEQ, UNGE, UNGT, | |
2891 | UNLE, UNLT, LTGT}} | |
e543e219 | 2892 | }; |
ebce9df7 | 2893 | #define NUM_KNOWN_STD_PREDS ARRAY_SIZE (std_preds) |
e543e219 ZW |
2894 | |
2895 | /* Initialize the table of predicate definitions, starting with | |
c2acaf06 | 2896 | the information we have on generic predicates. */ |
e543e219 ZW |
2897 | |
2898 | static void | |
2899 | init_predicate_table (void) | |
2900 | { | |
2901 | size_t i, j; | |
2902 | struct pred_data *pred; | |
2903 | ||
2904 | predicate_table = htab_create_alloc (37, hash_struct_pred_data, | |
2905 | eq_struct_pred_data, 0, | |
2906 | xcalloc, free); | |
2907 | ||
ebce9df7 | 2908 | for (i = 0; i < NUM_KNOWN_STD_PREDS; i++) |
e543e219 | 2909 | { |
cceb1885 | 2910 | pred = XCNEW (struct pred_data); |
ebce9df7 PB |
2911 | pred->name = std_preds[i].name; |
2912 | pred->special = std_preds[i].special; | |
e543e219 | 2913 | |
ebce9df7 | 2914 | for (j = 0; std_preds[i].codes[j] != 0; j++) |
e663da80 RS |
2915 | add_predicate_code (pred, std_preds[i].codes[j]); |
2916 | ||
2917 | if (std_preds[i].allows_const_p) | |
2918 | for (j = 0; j < NUM_RTX_CODE; j++) | |
2919 | if (GET_RTX_CLASS (j) == RTX_CONST_OBJ) | |
bbbbb16a | 2920 | add_predicate_code (pred, (enum rtx_code) j); |
b8698a0f | 2921 | |
e543e219 ZW |
2922 | add_predicate (pred); |
2923 | } | |
e543e219 | 2924 | } |
0458fe77 ZW |
2925 | \f |
2926 | /* These functions allow linkage with print-rtl.c. Also, some generators | |
2927 | like to annotate their output with insn names. */ | |
2928 | ||
2929 | /* Holds an array of names indexed by insn_code_number. */ | |
2930 | static char **insn_name_ptr = 0; | |
2931 | static int insn_name_ptr_size = 0; | |
2932 | ||
2933 | const char * | |
2934 | get_insn_name (int code) | |
2935 | { | |
2936 | if (code < insn_name_ptr_size) | |
2937 | return insn_name_ptr[code]; | |
2938 | else | |
2939 | return NULL; | |
2940 | } | |
2941 | ||
2942 | static void | |
2943 | record_insn_name (int code, const char *name) | |
2944 | { | |
2945 | static const char *last_real_name = "insn"; | |
2946 | static int last_real_code = 0; | |
8ad97cfc | 2947 | char *new_name; |
0458fe77 ZW |
2948 | |
2949 | if (insn_name_ptr_size <= code) | |
2950 | { | |
2951 | int new_size; | |
2952 | new_size = (insn_name_ptr_size ? insn_name_ptr_size * 2 : 512); | |
7cbb2a85 | 2953 | insn_name_ptr = XRESIZEVEC (char *, insn_name_ptr, new_size); |
0458fe77 | 2954 | memset (insn_name_ptr + insn_name_ptr_size, 0, |
c3284718 | 2955 | sizeof (char *) * (new_size - insn_name_ptr_size)); |
0458fe77 ZW |
2956 | insn_name_ptr_size = new_size; |
2957 | } | |
2958 | ||
2959 | if (!name || name[0] == '\0') | |
2960 | { | |
8ad97cfc KG |
2961 | new_name = XNEWVAR (char, strlen (last_real_name) + 10); |
2962 | sprintf (new_name, "%s+%d", last_real_name, code - last_real_code); | |
0458fe77 ZW |
2963 | } |
2964 | else | |
2965 | { | |
8ad97cfc | 2966 | last_real_name = new_name = xstrdup (name); |
0458fe77 ZW |
2967 | last_real_code = code; |
2968 | } | |
2969 | ||
8ad97cfc | 2970 | insn_name_ptr[code] = new_name; |
0458fe77 | 2971 | } |
e792559a RS |
2972 | \f |
2973 | /* Make STATS describe the operands that appear in rtx X. */ | |
2974 | ||
2975 | static void | |
2976 | get_pattern_stats_1 (struct pattern_stats *stats, rtx x) | |
2977 | { | |
2978 | RTX_CODE code; | |
2979 | int i; | |
2980 | int len; | |
2981 | const char *fmt; | |
2982 | ||
2983 | if (x == NULL_RTX) | |
2984 | return; | |
2985 | ||
2986 | code = GET_CODE (x); | |
2987 | switch (code) | |
2988 | { | |
2989 | case MATCH_OPERAND: | |
2990 | case MATCH_OPERATOR: | |
2991 | case MATCH_PARALLEL: | |
2992 | stats->max_opno = MAX (stats->max_opno, XINT (x, 0)); | |
2993 | break; | |
2994 | ||
2995 | case MATCH_DUP: | |
2996 | case MATCH_OP_DUP: | |
2997 | case MATCH_PAR_DUP: | |
2998 | stats->num_dups++; | |
2999 | stats->max_dup_opno = MAX (stats->max_dup_opno, XINT (x, 0)); | |
3000 | break; | |
3001 | ||
3002 | case MATCH_SCRATCH: | |
d5a216fa JJ |
3003 | if (stats->min_scratch_opno == -1) |
3004 | stats->min_scratch_opno = XINT (x, 0); | |
3005 | else | |
3006 | stats->min_scratch_opno = MIN (stats->min_scratch_opno, XINT (x, 0)); | |
e792559a RS |
3007 | stats->max_scratch_opno = MAX (stats->max_scratch_opno, XINT (x, 0)); |
3008 | break; | |
3009 | ||
3010 | default: | |
3011 | break; | |
3012 | } | |
3013 | ||
3014 | fmt = GET_RTX_FORMAT (code); | |
3015 | len = GET_RTX_LENGTH (code); | |
3016 | for (i = 0; i < len; i++) | |
3017 | { | |
3018 | if (fmt[i] == 'e' || fmt[i] == 'u') | |
3019 | get_pattern_stats_1 (stats, XEXP (x, i)); | |
3020 | else if (fmt[i] == 'E') | |
3021 | { | |
3022 | int j; | |
3023 | for (j = 0; j < XVECLEN (x, i); j++) | |
3024 | get_pattern_stats_1 (stats, XVECEXP (x, i, j)); | |
3025 | } | |
3026 | } | |
3027 | } | |
3028 | ||
3029 | /* Make STATS describe the operands that appear in instruction pattern | |
3030 | PATTERN. */ | |
3031 | ||
3032 | void | |
3033 | get_pattern_stats (struct pattern_stats *stats, rtvec pattern) | |
3034 | { | |
3035 | int i, len; | |
3036 | ||
3037 | stats->max_opno = -1; | |
3038 | stats->max_dup_opno = -1; | |
d5a216fa | 3039 | stats->min_scratch_opno = -1; |
e792559a RS |
3040 | stats->max_scratch_opno = -1; |
3041 | stats->num_dups = 0; | |
3042 | ||
3043 | len = GET_NUM_ELEM (pattern); | |
3044 | for (i = 0; i < len; i++) | |
3045 | get_pattern_stats_1 (stats, RTVEC_ELT (pattern, i)); | |
3046 | ||
3047 | stats->num_generator_args = stats->max_opno + 1; | |
3048 | stats->num_insn_operands = MAX (stats->max_opno, | |
3049 | stats->max_scratch_opno) + 1; | |
3050 | stats->num_operand_vars = MAX (stats->max_opno, | |
3051 | MAX (stats->max_dup_opno, | |
3052 | stats->max_scratch_opno)) + 1; | |
3053 | } | |
3beaff21 | 3054 | |
9d8895c9 RS |
3055 | /* Return the emit_* function that should be used for pattern X, or NULL |
3056 | if we can't pick a particular type at compile time and should instead | |
3057 | fall back to "emit". */ | |
3beaff21 RS |
3058 | |
3059 | const char * | |
3060 | get_emit_function (rtx x) | |
3061 | { | |
3062 | switch (classify_insn (x)) | |
3063 | { | |
3064 | case INSN: | |
3065 | return "emit_insn"; | |
3066 | ||
3067 | case CALL_INSN: | |
3068 | return "emit_call_insn"; | |
3069 | ||
3070 | case JUMP_INSN: | |
3071 | return "emit_jump_insn"; | |
3072 | ||
3073 | case UNKNOWN: | |
9d8895c9 | 3074 | return NULL; |
3beaff21 RS |
3075 | |
3076 | default: | |
3077 | gcc_unreachable (); | |
3078 | } | |
3079 | } | |
3080 | ||
3081 | /* Return true if we must emit a barrier after pattern X. */ | |
3082 | ||
3083 | bool | |
3084 | needs_barrier_p (rtx x) | |
3085 | { | |
3086 | return (GET_CODE (x) == SET | |
3087 | && GET_CODE (SET_DEST (x)) == PC | |
3088 | && GET_CODE (SET_SRC (x)) == LABEL_REF); | |
3089 | } | |
886456e2 RS |
3090 | |
3091 | #define NS "NULL" | |
3092 | #define ZS "'\\0'" | |
3093 | #define OPTAB_CL(o, p, c, b, l) { #o, p, #b, ZS, #l, o, c, UNKNOWN, 1 }, | |
3094 | #define OPTAB_CX(o, p) { #o, p, NULL, NULL, NULL, o, UNKNOWN, UNKNOWN, 1 }, | |
3095 | #define OPTAB_CD(o, p) { #o, p, NS, ZS, NS, o, UNKNOWN, UNKNOWN, 2 }, | |
3096 | #define OPTAB_NL(o, p, c, b, s, l) { #o, p, #b, #s, #l, o, c, c, 3 }, | |
3097 | #define OPTAB_NC(o, p, c) { #o, p, NS, ZS, NS, o, c, c, 3 }, | |
3098 | #define OPTAB_NX(o, p) { #o, p, NULL, NULL, NULL, o, UNKNOWN, UNKNOWN, 3 }, | |
3099 | #define OPTAB_VL(o, p, c, b, s, l) { #o, p, #b, #s, #l, o, c, UNKNOWN, 3 }, | |
3100 | #define OPTAB_VC(o, p, c) { #o, p, NS, ZS, NS, o, c, UNKNOWN, 3 }, | |
3101 | #define OPTAB_VX(o, p) { #o, p, NULL, NULL, NULL, o, UNKNOWN, UNKNOWN, 3 }, | |
3102 | #define OPTAB_DC(o, p, c) { #o, p, NS, ZS, NS, o, c, c, 4 }, | |
3103 | #define OPTAB_D(o, p) { #o, p, NS, ZS, NS, o, UNKNOWN, UNKNOWN, 4 }, | |
3104 | ||
3105 | /* An array of all optabs. Note that the same optab can appear more | |
3106 | than once, with a different pattern. */ | |
3107 | optab_def optabs[] = { | |
3108 | { "unknown_optab", NULL, NS, ZS, NS, unknown_optab, UNKNOWN, UNKNOWN, 0 }, | |
3109 | #include "optabs.def" | |
3110 | }; | |
3111 | ||
3112 | /* The number of entries in optabs[]. */ | |
3113 | unsigned int num_optabs = ARRAY_SIZE (optabs); | |
3114 | ||
3115 | #undef OPTAB_CL | |
3116 | #undef OPTAB_CX | |
3117 | #undef OPTAB_CD | |
3118 | #undef OPTAB_NL | |
3119 | #undef OPTAB_NC | |
3120 | #undef OPTAB_NX | |
3121 | #undef OPTAB_VL | |
3122 | #undef OPTAB_VC | |
3123 | #undef OPTAB_VX | |
3124 | #undef OPTAB_DC | |
3125 | #undef OPTAB_D | |
3126 | ||
3127 | /* Return true if instruction NAME matches pattern PAT, storing information | |
3128 | about the match in P if so. */ | |
3129 | ||
3130 | static bool | |
3131 | match_pattern (optab_pattern *p, const char *name, const char *pat) | |
3132 | { | |
3133 | bool force_float = false; | |
3134 | bool force_int = false; | |
3135 | bool force_partial_int = false; | |
3136 | bool force_fixed = false; | |
3137 | ||
3138 | if (pat == NULL) | |
3139 | return false; | |
3140 | for (; ; ++pat) | |
3141 | { | |
3142 | if (*pat != '$') | |
3143 | { | |
3144 | if (*pat != *name++) | |
3145 | return false; | |
3146 | if (*pat == '\0') | |
3147 | return true; | |
3148 | continue; | |
3149 | } | |
3150 | switch (*++pat) | |
3151 | { | |
3152 | case 'I': | |
3153 | force_int = 1; | |
3154 | break; | |
3155 | case 'P': | |
3156 | force_partial_int = 1; | |
3157 | break; | |
3158 | case 'F': | |
3159 | force_float = 1; | |
3160 | break; | |
3161 | case 'Q': | |
3162 | force_fixed = 1; | |
3163 | break; | |
3164 | ||
3165 | case 'a': | |
3166 | case 'b': | |
3167 | { | |
3168 | int i; | |
3169 | ||
3170 | /* This loop will stop at the first prefix match, so | |
3171 | look through the modes in reverse order, in case | |
3172 | there are extra CC modes and CC is a prefix of the | |
3173 | CC modes (as it should be). */ | |
3174 | for (i = (MAX_MACHINE_MODE) - 1; i >= 0; i--) | |
3175 | { | |
3176 | const char *p, *q; | |
3177 | for (p = GET_MODE_NAME (i), q = name; *p; p++, q++) | |
3178 | if (TOLOWER (*p) != *q) | |
3179 | break; | |
3180 | if (*p == 0 | |
3181 | && (! force_int || mode_class[i] == MODE_INT | |
3182 | || mode_class[i] == MODE_VECTOR_INT) | |
3183 | && (! force_partial_int | |
3184 | || mode_class[i] == MODE_INT | |
3185 | || mode_class[i] == MODE_PARTIAL_INT | |
3186 | || mode_class[i] == MODE_VECTOR_INT) | |
3187 | && (! force_float | |
3188 | || mode_class[i] == MODE_FLOAT | |
3189 | || mode_class[i] == MODE_DECIMAL_FLOAT | |
3190 | || mode_class[i] == MODE_COMPLEX_FLOAT | |
3191 | || mode_class[i] == MODE_VECTOR_FLOAT) | |
3192 | && (! force_fixed | |
3193 | || mode_class[i] == MODE_FRACT | |
3194 | || mode_class[i] == MODE_UFRACT | |
3195 | || mode_class[i] == MODE_ACCUM | |
3196 | || mode_class[i] == MODE_UACCUM | |
3197 | || mode_class[i] == MODE_VECTOR_FRACT | |
3198 | || mode_class[i] == MODE_VECTOR_UFRACT | |
3199 | || mode_class[i] == MODE_VECTOR_ACCUM | |
3200 | || mode_class[i] == MODE_VECTOR_UACCUM)) | |
3201 | break; | |
3202 | } | |
3203 | ||
3204 | if (i < 0) | |
3205 | return false; | |
3206 | name += strlen (GET_MODE_NAME (i)); | |
3207 | if (*pat == 'a') | |
3208 | p->m1 = i; | |
3209 | else | |
3210 | p->m2 = i; | |
3211 | ||
3212 | force_int = false; | |
3213 | force_partial_int = false; | |
3214 | force_float = false; | |
3215 | force_fixed = false; | |
3216 | } | |
3217 | break; | |
3218 | ||
3219 | default: | |
3220 | gcc_unreachable (); | |
3221 | } | |
3222 | } | |
3223 | } | |
3224 | ||
3225 | /* Return true if NAME is the name of an optab, describing it in P if so. */ | |
3226 | ||
3227 | bool | |
3228 | find_optab (optab_pattern *p, const char *name) | |
3229 | { | |
3230 | if (*name == 0 || *name == '*') | |
3231 | return false; | |
3232 | ||
3233 | /* See if NAME matches one of the patterns we have for the optabs | |
3234 | we know about. */ | |
3235 | for (unsigned int pindex = 0; pindex < ARRAY_SIZE (optabs); pindex++) | |
3236 | { | |
3237 | p->m1 = p->m2 = 0; | |
3238 | if (match_pattern (p, name, optabs[pindex].pattern)) | |
3239 | { | |
3240 | p->name = name; | |
3241 | p->op = optabs[pindex].op; | |
3242 | p->sort_num = (p->op << 16) | (p->m2 << 8) | p->m1; | |
3243 | return true; | |
3244 | } | |
3245 | } | |
3246 | return false; | |
3247 | } |