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3916d6d8 | 1 | /* Support routines for the various generation passes. |
7adcbafe | 2 | Copyright (C) 2000-2022 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 | |
6c1dae73 | 68 | class queue_elem |
3262c1f5 | 69 | { |
6c1dae73 | 70 | public: |
3262c1f5 | 71 | rtx data; |
cc472607 | 72 | file_location loc; |
99b1c316 | 73 | class queue_elem *next; |
f4fde1b3 RS |
74 | /* In a DEFINE_INSN that came from a DEFINE_INSN_AND_SPLIT or |
75 | DEFINE_INSN_AND_REWRITE, SPLIT points to the generated DEFINE_SPLIT. */ | |
99b1c316 | 76 | class queue_elem *split; |
c88c0d42 CP |
77 | }; |
78 | ||
64aad689 AK |
79 | #define MNEMONIC_ATTR_NAME "mnemonic" |
80 | #define MNEMONIC_HTAB_SIZE 1024 | |
81 | ||
99b1c316 MS |
82 | static class queue_elem *define_attr_queue; |
83 | static class queue_elem **define_attr_tail = &define_attr_queue; | |
84 | static class queue_elem *define_pred_queue; | |
85 | static class queue_elem **define_pred_tail = &define_pred_queue; | |
86 | static class queue_elem *define_insn_queue; | |
87 | static class queue_elem **define_insn_tail = &define_insn_queue; | |
88 | static class queue_elem *define_cond_exec_queue; | |
89 | static class queue_elem **define_cond_exec_tail = &define_cond_exec_queue; | |
90 | static class queue_elem *define_subst_queue; | |
91 | static class queue_elem **define_subst_tail = &define_subst_queue; | |
92 | static class queue_elem *other_queue; | |
93 | static class queue_elem **other_tail = &other_queue; | |
94 | static class queue_elem *define_subst_attr_queue; | |
95 | static class queue_elem **define_subst_attr_tail = &define_subst_attr_queue; | |
c88c0d42 | 96 | |
58d745ec RS |
97 | /* Mapping from DEFINE_* rtxes to their location in the source file. */ |
98 | static hash_map <rtx, file_location> *rtx_locs; | |
99 | ||
3d7aafde | 100 | static void remove_constraints (rtx); |
3d7aafde | 101 | |
99b1c316 | 102 | static int is_predicable (class queue_elem *); |
3d7aafde AJ |
103 | static void identify_predicable_attribute (void); |
104 | static int n_alternatives (const char *); | |
105 | static void collect_insn_data (rtx, int *, int *); | |
99b1c316 MS |
106 | static const char *alter_test_for_insn (class queue_elem *, |
107 | class queue_elem *); | |
3d7aafde | 108 | static char *shift_output_template (char *, const char *, int); |
99b1c316 MS |
109 | static const char *alter_output_for_insn (class queue_elem *, |
110 | class queue_elem *, | |
3d7aafde | 111 | int, int); |
99b1c316 | 112 | static void process_one_cond_exec (class queue_elem *); |
3d7aafde | 113 | static void process_define_cond_exec (void); |
e543e219 | 114 | static void init_predicate_table (void); |
0458fe77 | 115 | static void record_insn_name (int, const char *); |
477c104e | 116 | |
99b1c316 | 117 | static bool has_subst_attribute (class queue_elem *, class queue_elem *); |
477c104e | 118 | static const char * alter_output_for_subst_insn (rtx, int); |
99b1c316 MS |
119 | static void alter_attrs_for_subst_insn (class queue_elem *, int); |
120 | static void process_substs_on_one_elem (class queue_elem *, | |
121 | class queue_elem *); | |
477c104e MK |
122 | static rtx subst_dup (rtx, int, int); |
123 | static void process_define_subst (void); | |
124 | ||
125 | static const char * duplicate_alternatives (const char *, int); | |
126 | static const char * duplicate_each_alternative (const char * str, int n_dup); | |
127 | ||
128 | typedef const char * (*constraints_handler_t) (const char *, int); | |
129 | static rtx alter_constraints (rtx, int, constraints_handler_t); | |
a7ba15ca | 130 | static rtx adjust_operands_numbers (rtx); |
477c104e | 131 | static rtx replace_duplicating_operands_in_pattern (rtx); |
3916d6d8 | 132 | \f |
10b76d73 RK |
133 | /* Make a version of gen_rtx_CONST_INT so that GEN_INT can be used in |
134 | the gensupport programs. */ | |
135 | ||
136 | rtx | |
ef4bddc2 | 137 | gen_rtx_CONST_INT (machine_mode ARG_UNUSED (mode), |
3d7aafde | 138 | HOST_WIDE_INT arg) |
10b76d73 RK |
139 | { |
140 | rtx rt = rtx_alloc (CONST_INT); | |
141 | ||
142 | XWINT (rt, 0) = arg; | |
143 | return rt; | |
144 | } | |
313d38e3 RS |
145 | |
146 | /* Return the rtx pattern specified by the list of rtxes in a | |
147 | define_insn or define_split. */ | |
148 | ||
149 | rtx | |
150 | add_implicit_parallel (rtvec vec) | |
151 | { | |
152 | if (GET_NUM_ELEM (vec) == 1) | |
153 | return RTVEC_ELT (vec, 0); | |
154 | else | |
155 | { | |
156 | rtx pattern = rtx_alloc (PARALLEL); | |
157 | XVEC (pattern, 0) = vec; | |
158 | return pattern; | |
159 | } | |
160 | } | |
3916d6d8 | 161 | \f |
77059241 RS |
162 | /* Predicate handling. |
163 | ||
164 | We construct from the machine description a table mapping each | |
165 | predicate to a list of the rtl codes it can possibly match. The | |
166 | function 'maybe_both_true' uses it to deduce that there are no | |
167 | expressions that can be matches by certain pairs of tree nodes. | |
168 | Also, if a predicate can match only one code, we can hardwire that | |
169 | code into the node testing the predicate. | |
170 | ||
171 | Some predicates are flagged as special. validate_pattern will not | |
172 | warn about modeless match_operand expressions if they have a | |
173 | special predicate. Predicates that allow only constants are also | |
174 | treated as special, for this purpose. | |
175 | ||
176 | validate_pattern will warn about predicates that allow non-lvalues | |
177 | when they appear in destination operands. | |
178 | ||
179 | Calculating the set of rtx codes that can possibly be accepted by a | |
180 | predicate expression EXP requires a three-state logic: any given | |
181 | subexpression may definitively accept a code C (Y), definitively | |
182 | reject a code C (N), or may have an indeterminate effect (I). N | |
183 | and I is N; Y or I is Y; Y and I, N or I are both I. Here are full | |
184 | truth tables. | |
185 | ||
186 | a b a&b a|b | |
187 | Y Y Y Y | |
188 | N Y N Y | |
189 | N N N N | |
190 | I Y I Y | |
191 | I N N I | |
192 | I I I I | |
193 | ||
194 | We represent Y with 1, N with 0, I with 2. If any code is left in | |
195 | an I state by the complete expression, we must assume that that | |
196 | code can be accepted. */ | |
197 | ||
198 | #define N 0 | |
199 | #define Y 1 | |
200 | #define I 2 | |
201 | ||
202 | #define TRISTATE_AND(a,b) \ | |
203 | ((a) == I ? ((b) == N ? N : I) : \ | |
204 | (b) == I ? ((a) == N ? N : I) : \ | |
205 | (a) && (b)) | |
206 | ||
207 | #define TRISTATE_OR(a,b) \ | |
208 | ((a) == I ? ((b) == Y ? Y : I) : \ | |
209 | (b) == I ? ((a) == Y ? Y : I) : \ | |
210 | (a) || (b)) | |
211 | ||
212 | #define TRISTATE_NOT(a) \ | |
213 | ((a) == I ? I : !(a)) | |
214 | ||
215 | /* 0 means no warning about that code yet, 1 means warned. */ | |
216 | static char did_you_mean_codes[NUM_RTX_CODE]; | |
217 | ||
218 | /* Recursively calculate the set of rtx codes accepted by the | |
c9f84f2e RS |
219 | predicate expression EXP, writing the result to CODES. LOC is |
220 | the .md file location of the directive containing EXP. */ | |
77059241 | 221 | |
851ee5f4 | 222 | void |
c9f84f2e | 223 | compute_test_codes (rtx exp, file_location loc, char *codes) |
77059241 RS |
224 | { |
225 | char op0_codes[NUM_RTX_CODE]; | |
226 | char op1_codes[NUM_RTX_CODE]; | |
227 | char op2_codes[NUM_RTX_CODE]; | |
228 | int i; | |
229 | ||
230 | switch (GET_CODE (exp)) | |
231 | { | |
232 | case AND: | |
c9f84f2e RS |
233 | compute_test_codes (XEXP (exp, 0), loc, op0_codes); |
234 | compute_test_codes (XEXP (exp, 1), loc, op1_codes); | |
77059241 RS |
235 | for (i = 0; i < NUM_RTX_CODE; i++) |
236 | codes[i] = TRISTATE_AND (op0_codes[i], op1_codes[i]); | |
237 | break; | |
238 | ||
239 | case IOR: | |
c9f84f2e RS |
240 | compute_test_codes (XEXP (exp, 0), loc, op0_codes); |
241 | compute_test_codes (XEXP (exp, 1), loc, op1_codes); | |
77059241 RS |
242 | for (i = 0; i < NUM_RTX_CODE; i++) |
243 | codes[i] = TRISTATE_OR (op0_codes[i], op1_codes[i]); | |
244 | break; | |
245 | case NOT: | |
c9f84f2e | 246 | compute_test_codes (XEXP (exp, 0), loc, op0_codes); |
77059241 RS |
247 | for (i = 0; i < NUM_RTX_CODE; i++) |
248 | codes[i] = TRISTATE_NOT (op0_codes[i]); | |
249 | break; | |
250 | ||
251 | case IF_THEN_ELSE: | |
252 | /* a ? b : c accepts the same codes as (a & b) | (!a & c). */ | |
c9f84f2e RS |
253 | compute_test_codes (XEXP (exp, 0), loc, op0_codes); |
254 | compute_test_codes (XEXP (exp, 1), loc, op1_codes); | |
255 | compute_test_codes (XEXP (exp, 2), loc, op2_codes); | |
77059241 RS |
256 | for (i = 0; i < NUM_RTX_CODE; i++) |
257 | codes[i] = TRISTATE_OR (TRISTATE_AND (op0_codes[i], op1_codes[i]), | |
258 | TRISTATE_AND (TRISTATE_NOT (op0_codes[i]), | |
259 | op2_codes[i])); | |
260 | break; | |
261 | ||
262 | case MATCH_CODE: | |
263 | /* MATCH_CODE allows a specified list of codes. However, if it | |
264 | does not apply to the top level of the expression, it does not | |
265 | constrain the set of codes for the top level. */ | |
266 | if (XSTR (exp, 1)[0] != '\0') | |
267 | { | |
268 | memset (codes, Y, NUM_RTX_CODE); | |
269 | break; | |
270 | } | |
271 | ||
272 | memset (codes, N, NUM_RTX_CODE); | |
273 | { | |
274 | const char *next_code = XSTR (exp, 0); | |
275 | const char *code; | |
276 | ||
277 | if (*next_code == '\0') | |
278 | { | |
c9f84f2e | 279 | error_at (loc, "empty match_code expression"); |
77059241 RS |
280 | break; |
281 | } | |
282 | ||
283 | while ((code = scan_comma_elt (&next_code)) != 0) | |
284 | { | |
285 | size_t n = next_code - code; | |
286 | int found_it = 0; | |
287 | ||
288 | for (i = 0; i < NUM_RTX_CODE; i++) | |
289 | if (!strncmp (code, GET_RTX_NAME (i), n) | |
290 | && GET_RTX_NAME (i)[n] == '\0') | |
291 | { | |
292 | codes[i] = Y; | |
293 | found_it = 1; | |
294 | break; | |
295 | } | |
296 | if (!found_it) | |
297 | { | |
c9f84f2e RS |
298 | error_at (loc, "match_code \"%.*s\" matches nothing", |
299 | (int) n, code); | |
77059241 RS |
300 | for (i = 0; i < NUM_RTX_CODE; i++) |
301 | if (!strncasecmp (code, GET_RTX_NAME (i), n) | |
302 | && GET_RTX_NAME (i)[n] == '\0' | |
303 | && !did_you_mean_codes[i]) | |
304 | { | |
305 | did_you_mean_codes[i] = 1; | |
c9f84f2e RS |
306 | message_at (loc, "(did you mean \"%s\"?)", |
307 | GET_RTX_NAME (i)); | |
77059241 RS |
308 | } |
309 | } | |
310 | } | |
311 | } | |
312 | break; | |
313 | ||
314 | case MATCH_OPERAND: | |
315 | /* MATCH_OPERAND disallows the set of codes that the named predicate | |
316 | disallows, and is indeterminate for the codes that it does allow. */ | |
317 | { | |
318 | struct pred_data *p = lookup_predicate (XSTR (exp, 1)); | |
319 | if (!p) | |
320 | { | |
c9f84f2e RS |
321 | error_at (loc, "reference to unknown predicate '%s'", |
322 | XSTR (exp, 1)); | |
77059241 RS |
323 | break; |
324 | } | |
325 | for (i = 0; i < NUM_RTX_CODE; i++) | |
326 | codes[i] = p->codes[i] ? I : N; | |
327 | } | |
328 | break; | |
329 | ||
330 | ||
331 | case MATCH_TEST: | |
332 | /* (match_test WHATEVER) is completely indeterminate. */ | |
333 | memset (codes, I, NUM_RTX_CODE); | |
334 | break; | |
335 | ||
336 | default: | |
c9f84f2e RS |
337 | error_at (loc, "'%s' cannot be used in predicates or constraints", |
338 | GET_RTX_NAME (GET_CODE (exp))); | |
77059241 RS |
339 | memset (codes, I, NUM_RTX_CODE); |
340 | break; | |
341 | } | |
342 | } | |
343 | ||
344 | #undef TRISTATE_OR | |
345 | #undef TRISTATE_AND | |
346 | #undef TRISTATE_NOT | |
347 | ||
348 | /* Return true if NAME is a valid predicate name. */ | |
349 | ||
350 | static bool | |
351 | valid_predicate_name_p (const char *name) | |
352 | { | |
353 | const char *p; | |
354 | ||
355 | if (!ISALPHA (name[0]) && name[0] != '_') | |
356 | return false; | |
357 | for (p = name + 1; *p; p++) | |
358 | if (!ISALNUM (*p) && *p != '_') | |
359 | return false; | |
360 | return true; | |
361 | } | |
362 | ||
cc472607 RS |
363 | /* Process define_predicate directive DESC, which appears at location LOC. |
364 | Compute the set of codes that can be matched, and record this as a known | |
365 | predicate. */ | |
77059241 RS |
366 | |
367 | static void | |
cc472607 | 368 | process_define_predicate (rtx desc, file_location loc) |
77059241 RS |
369 | { |
370 | struct pred_data *pred; | |
371 | char codes[NUM_RTX_CODE]; | |
372 | int i; | |
373 | ||
374 | if (!valid_predicate_name_p (XSTR (desc, 0))) | |
375 | { | |
cc472607 RS |
376 | error_at (loc, "%s: predicate name must be a valid C function name", |
377 | XSTR (desc, 0)); | |
77059241 RS |
378 | return; |
379 | } | |
380 | ||
381 | pred = XCNEW (struct pred_data); | |
382 | pred->name = XSTR (desc, 0); | |
383 | pred->exp = XEXP (desc, 1); | |
384 | pred->c_block = XSTR (desc, 2); | |
385 | if (GET_CODE (desc) == DEFINE_SPECIAL_PREDICATE) | |
386 | pred->special = true; | |
387 | ||
c9f84f2e | 388 | compute_test_codes (XEXP (desc, 1), loc, codes); |
77059241 RS |
389 | |
390 | for (i = 0; i < NUM_RTX_CODE; i++) | |
391 | if (codes[i] != N) | |
392 | add_predicate_code (pred, (enum rtx_code) i); | |
393 | ||
394 | add_predicate (pred); | |
395 | } | |
396 | #undef I | |
397 | #undef N | |
398 | #undef Y | |
399 | \f | |
a406f566 MM |
400 | /* Queue PATTERN on LIST_TAIL. Return the address of the new queue |
401 | element. */ | |
3262c1f5 | 402 | |
99b1c316 MS |
403 | static class queue_elem * |
404 | queue_pattern (rtx pattern, class queue_elem ***list_tail, | |
cc472607 | 405 | file_location loc) |
3262c1f5 | 406 | { |
99b1c316 | 407 | class queue_elem *e = XNEW (class queue_elem); |
3262c1f5 | 408 | e->data = pattern; |
cc472607 | 409 | e->loc = loc; |
3262c1f5 | 410 | e->next = NULL; |
a406f566 | 411 | e->split = NULL; |
3262c1f5 RH |
412 | **list_tail = e; |
413 | *list_tail = &e->next; | |
a406f566 | 414 | return e; |
3262c1f5 RH |
415 | } |
416 | ||
477c104e MK |
417 | /* Remove element ELEM from QUEUE. */ |
418 | static void | |
99b1c316 | 419 | remove_from_queue (class queue_elem *elem, class queue_elem **queue) |
477c104e | 420 | { |
99b1c316 | 421 | class queue_elem *prev, *e; |
477c104e MK |
422 | prev = NULL; |
423 | for (e = *queue; e ; e = e->next) | |
424 | { | |
425 | if (e == elem) | |
426 | break; | |
427 | prev = e; | |
428 | } | |
429 | if (e == NULL) | |
430 | return; | |
431 | ||
432 | if (prev) | |
433 | prev->next = elem->next; | |
434 | else | |
435 | *queue = elem->next; | |
436 | } | |
437 | ||
0bddee8e BS |
438 | /* Build a define_attr for an binary attribute with name NAME and |
439 | possible values "yes" and "no", and queue it. */ | |
440 | static void | |
441 | add_define_attr (const char *name) | |
442 | { | |
99b1c316 | 443 | class queue_elem *e = XNEW (class queue_elem); |
0bddee8e BS |
444 | rtx t1 = rtx_alloc (DEFINE_ATTR); |
445 | XSTR (t1, 0) = name; | |
446 | XSTR (t1, 1) = "no,yes"; | |
447 | XEXP (t1, 2) = rtx_alloc (CONST_STRING); | |
448 | XSTR (XEXP (t1, 2), 0) = "yes"; | |
449 | e->data = t1; | |
3814e880 | 450 | e->loc = file_location ("built-in", -1, -1); |
0bddee8e BS |
451 | e->next = define_attr_queue; |
452 | define_attr_queue = e; | |
453 | ||
454 | } | |
455 | ||
c88c0d42 CP |
456 | /* Recursively remove constraints from an rtx. */ |
457 | ||
458 | static void | |
3d7aafde | 459 | remove_constraints (rtx part) |
c88c0d42 | 460 | { |
b3694847 SS |
461 | int i, j; |
462 | const char *format_ptr; | |
c88c0d42 CP |
463 | |
464 | if (part == 0) | |
465 | return; | |
466 | ||
467 | if (GET_CODE (part) == MATCH_OPERAND) | |
468 | XSTR (part, 2) = ""; | |
469 | else if (GET_CODE (part) == MATCH_SCRATCH) | |
470 | XSTR (part, 1) = ""; | |
471 | ||
472 | format_ptr = GET_RTX_FORMAT (GET_CODE (part)); | |
473 | ||
474 | for (i = 0; i < GET_RTX_LENGTH (GET_CODE (part)); i++) | |
475 | switch (*format_ptr++) | |
476 | { | |
477 | case 'e': | |
478 | case 'u': | |
479 | remove_constraints (XEXP (part, i)); | |
480 | break; | |
481 | case 'E': | |
482 | if (XVEC (part, i) != NULL) | |
483 | for (j = 0; j < XVECLEN (part, i); j++) | |
484 | remove_constraints (XVECEXP (part, i, j)); | |
485 | break; | |
486 | } | |
487 | } | |
488 | ||
f4fde1b3 RS |
489 | /* Recursively replace MATCH_OPERANDs with MATCH_DUPs and MATCH_OPERATORs |
490 | with MATCH_OP_DUPs in X. */ | |
491 | ||
492 | static rtx | |
493 | replace_operands_with_dups (rtx x) | |
494 | { | |
495 | if (x == 0) | |
496 | return x; | |
497 | ||
498 | rtx newx; | |
499 | if (GET_CODE (x) == MATCH_OPERAND) | |
500 | { | |
501 | newx = rtx_alloc (MATCH_DUP); | |
502 | XINT (newx, 0) = XINT (x, 0); | |
d281492d | 503 | x = newx; |
f4fde1b3 RS |
504 | } |
505 | else if (GET_CODE (x) == MATCH_OPERATOR) | |
506 | { | |
507 | newx = rtx_alloc (MATCH_OP_DUP); | |
508 | XINT (newx, 0) = XINT (x, 0); | |
509 | XVEC (newx, 1) = XVEC (x, 2); | |
d281492d | 510 | x = newx; |
f4fde1b3 RS |
511 | } |
512 | else | |
513 | newx = shallow_copy_rtx (x); | |
514 | ||
515 | const char *format_ptr = GET_RTX_FORMAT (GET_CODE (x)); | |
516 | for (int i = 0; i < GET_RTX_LENGTH (GET_CODE (x)); i++) | |
517 | switch (*format_ptr++) | |
518 | { | |
519 | case 'e': | |
520 | case 'u': | |
521 | XEXP (newx, i) = replace_operands_with_dups (XEXP (x, i)); | |
522 | break; | |
523 | case 'E': | |
524 | if (XVEC (x, i) != NULL) | |
525 | { | |
526 | XVEC (newx, i) = rtvec_alloc (XVECLEN (x, i)); | |
527 | for (int j = 0; j < XVECLEN (x, i); j++) | |
528 | XVECEXP (newx, i, j) | |
529 | = replace_operands_with_dups (XVECEXP (x, i, j)); | |
530 | } | |
531 | break; | |
532 | } | |
533 | return newx; | |
534 | } | |
535 | ||
536 | /* Convert matching pattern VEC from a DEFINE_INSN_AND_REWRITE into | |
537 | a sequence that should be generated by the splitter. */ | |
538 | ||
539 | static rtvec | |
540 | gen_rewrite_sequence (rtvec vec) | |
541 | { | |
542 | rtvec new_vec = rtvec_alloc (1); | |
543 | rtx x = add_implicit_parallel (vec); | |
544 | RTVEC_ELT (new_vec, 0) = replace_operands_with_dups (x); | |
545 | return new_vec; | |
546 | } | |
547 | ||
d91edf86 | 548 | /* Process a top level rtx in some way, queuing as appropriate. */ |
c88c0d42 CP |
549 | |
550 | static void | |
cc472607 | 551 | process_rtx (rtx desc, file_location loc) |
3262c1f5 RH |
552 | { |
553 | switch (GET_CODE (desc)) | |
554 | { | |
555 | case DEFINE_INSN: | |
cc472607 | 556 | queue_pattern (desc, &define_insn_tail, loc); |
3262c1f5 RH |
557 | break; |
558 | ||
559 | case DEFINE_COND_EXEC: | |
cc472607 | 560 | queue_pattern (desc, &define_cond_exec_tail, loc); |
3262c1f5 RH |
561 | break; |
562 | ||
477c104e | 563 | case DEFINE_SUBST: |
cc472607 | 564 | queue_pattern (desc, &define_subst_tail, loc); |
477c104e MK |
565 | break; |
566 | ||
567 | case DEFINE_SUBST_ATTR: | |
cc472607 | 568 | queue_pattern (desc, &define_subst_attr_tail, loc); |
477c104e MK |
569 | break; |
570 | ||
3262c1f5 | 571 | case DEFINE_ATTR: |
8f4fe86c | 572 | case DEFINE_ENUM_ATTR: |
cc472607 | 573 | queue_pattern (desc, &define_attr_tail, loc); |
3262c1f5 RH |
574 | break; |
575 | ||
e543e219 ZW |
576 | case DEFINE_PREDICATE: |
577 | case DEFINE_SPECIAL_PREDICATE: | |
cc472607 | 578 | process_define_predicate (desc, loc); |
77059241 RS |
579 | /* Fall through. */ |
580 | ||
f38840db ZW |
581 | case DEFINE_CONSTRAINT: |
582 | case DEFINE_REGISTER_CONSTRAINT: | |
583 | case DEFINE_MEMORY_CONSTRAINT: | |
9eb1ca69 | 584 | case DEFINE_SPECIAL_MEMORY_CONSTRAINT: |
02f2dc44 | 585 | case DEFINE_RELAXED_MEMORY_CONSTRAINT: |
f38840db | 586 | case DEFINE_ADDRESS_CONSTRAINT: |
cc472607 | 587 | queue_pattern (desc, &define_pred_tail, loc); |
e543e219 ZW |
588 | break; |
589 | ||
3262c1f5 | 590 | case DEFINE_INSN_AND_SPLIT: |
f4fde1b3 | 591 | case DEFINE_INSN_AND_REWRITE: |
3262c1f5 RH |
592 | { |
593 | const char *split_cond; | |
20217ac1 KG |
594 | rtx split; |
595 | rtvec attr; | |
de4bfbcb | 596 | int i; |
99b1c316 MS |
597 | class queue_elem *insn_elem; |
598 | class queue_elem *split_elem; | |
f4fde1b3 | 599 | int split_code = (GET_CODE (desc) == DEFINE_INSN_AND_REWRITE ? 5 : 6); |
3262c1f5 | 600 | |
dc297297 | 601 | /* Create a split with values from the insn_and_split. */ |
3262c1f5 | 602 | split = rtx_alloc (DEFINE_SPLIT); |
de4bfbcb RH |
603 | |
604 | i = XVECLEN (desc, 1); | |
fbd40359 | 605 | XVEC (split, 0) = rtvec_alloc (i); |
de4bfbcb RH |
606 | while (--i >= 0) |
607 | { | |
608 | XVECEXP (split, 0, i) = copy_rtx (XVECEXP (desc, 1, i)); | |
609 | remove_constraints (XVECEXP (split, 0, i)); | |
610 | } | |
3262c1f5 RH |
611 | |
612 | /* If the split condition starts with "&&", append it to the | |
613 | insn condition to create the new split condition. */ | |
614 | split_cond = XSTR (desc, 4); | |
615 | if (split_cond[0] == '&' && split_cond[1] == '&') | |
7445392c | 616 | { |
b78027d1 DM |
617 | rtx_reader_ptr->copy_md_ptr_loc (split_cond + 2, split_cond); |
618 | split_cond = rtx_reader_ptr->join_c_conditions (XSTR (desc, 2), | |
619 | split_cond + 2); | |
7445392c | 620 | } |
f4fde1b3 RS |
621 | else if (GET_CODE (desc) == DEFINE_INSN_AND_REWRITE) |
622 | error_at (loc, "the rewrite condition must start with `&&'"); | |
3262c1f5 | 623 | XSTR (split, 1) = split_cond; |
f4fde1b3 RS |
624 | if (GET_CODE (desc) == DEFINE_INSN_AND_REWRITE) |
625 | XVEC (split, 2) = gen_rewrite_sequence (XVEC (desc, 1)); | |
626 | else | |
627 | XVEC (split, 2) = XVEC (desc, 5); | |
628 | XSTR (split, 3) = XSTR (desc, split_code); | |
3262c1f5 RH |
629 | |
630 | /* Fix up the DEFINE_INSN. */ | |
f4fde1b3 | 631 | attr = XVEC (desc, split_code + 1); |
3262c1f5 | 632 | PUT_CODE (desc, DEFINE_INSN); |
ee138cf8 | 633 | XVEC (desc, 4) = attr; |
3262c1f5 RH |
634 | |
635 | /* Queue them. */ | |
cc472607 RS |
636 | insn_elem = queue_pattern (desc, &define_insn_tail, loc); |
637 | split_elem = queue_pattern (split, &other_tail, loc); | |
a406f566 | 638 | insn_elem->split = split_elem; |
3262c1f5 RH |
639 | break; |
640 | } | |
641 | ||
642 | default: | |
cc472607 | 643 | queue_pattern (desc, &other_tail, loc); |
3262c1f5 | 644 | break; |
c88c0d42 CP |
645 | } |
646 | } | |
3916d6d8 | 647 | \f |
3262c1f5 RH |
648 | /* Return true if attribute PREDICABLE is true for ELEM, which holds |
649 | a DEFINE_INSN. */ | |
650 | ||
651 | static int | |
99b1c316 | 652 | is_predicable (class queue_elem *elem) |
3262c1f5 RH |
653 | { |
654 | rtvec vec = XVEC (elem->data, 4); | |
655 | const char *value; | |
656 | int i; | |
657 | ||
658 | if (! vec) | |
659 | return predicable_default; | |
660 | ||
661 | for (i = GET_NUM_ELEM (vec) - 1; i >= 0; --i) | |
662 | { | |
663 | rtx sub = RTVEC_ELT (vec, i); | |
664 | switch (GET_CODE (sub)) | |
665 | { | |
666 | case SET_ATTR: | |
667 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
668 | { | |
669 | value = XSTR (sub, 1); | |
670 | goto found; | |
671 | } | |
672 | break; | |
673 | ||
674 | case SET_ATTR_ALTERNATIVE: | |
675 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
676 | { | |
cc472607 | 677 | error_at (elem->loc, "multiple alternatives for `predicable'"); |
3262c1f5 RH |
678 | return 0; |
679 | } | |
680 | break; | |
681 | ||
682 | case SET: | |
683 | if (GET_CODE (SET_DEST (sub)) != ATTR | |
684 | || strcmp (XSTR (SET_DEST (sub), 0), "predicable") != 0) | |
685 | break; | |
686 | sub = SET_SRC (sub); | |
687 | if (GET_CODE (sub) == CONST_STRING) | |
688 | { | |
689 | value = XSTR (sub, 0); | |
690 | goto found; | |
691 | } | |
692 | ||
693 | /* ??? It would be possible to handle this if we really tried. | |
694 | It's not easy though, and I'm not going to bother until it | |
695 | really proves necessary. */ | |
cc472607 | 696 | error_at (elem->loc, "non-constant value for `predicable'"); |
3262c1f5 RH |
697 | return 0; |
698 | ||
699 | default: | |
b2d59f6f | 700 | gcc_unreachable (); |
3262c1f5 RH |
701 | } |
702 | } | |
703 | ||
704 | return predicable_default; | |
705 | ||
706 | found: | |
0bddee8e BS |
707 | /* Find out which value we're looking at. Multiple alternatives means at |
708 | least one is predicable. */ | |
3262c1f5 | 709 | if (strchr (value, ',') != NULL) |
0bddee8e | 710 | return 1; |
3262c1f5 RH |
711 | if (strcmp (value, predicable_true) == 0) |
712 | return 1; | |
713 | if (strcmp (value, predicable_false) == 0) | |
714 | return 0; | |
715 | ||
cc472607 | 716 | error_at (elem->loc, "unknown value `%s' for `predicable' attribute", value); |
3262c1f5 RH |
717 | return 0; |
718 | } | |
719 | ||
477c104e MK |
720 | /* Find attribute SUBST in ELEM and assign NEW_VALUE to it. */ |
721 | static void | |
99b1c316 MS |
722 | change_subst_attribute (class queue_elem *elem, |
723 | class queue_elem *subst_elem, | |
477c104e MK |
724 | const char *new_value) |
725 | { | |
726 | rtvec attrs_vec = XVEC (elem->data, 4); | |
727 | const char *subst_name = XSTR (subst_elem->data, 0); | |
728 | int i; | |
729 | ||
730 | if (! attrs_vec) | |
731 | return; | |
732 | ||
733 | for (i = GET_NUM_ELEM (attrs_vec) - 1; i >= 0; --i) | |
734 | { | |
735 | rtx cur_attr = RTVEC_ELT (attrs_vec, i); | |
736 | if (GET_CODE (cur_attr) != SET_ATTR) | |
737 | continue; | |
738 | if (strcmp (XSTR (cur_attr, 0), subst_name) == 0) | |
739 | { | |
740 | XSTR (cur_attr, 1) = new_value; | |
741 | return; | |
742 | } | |
743 | } | |
744 | } | |
745 | ||
746 | /* Return true if ELEM has the attribute with the name of DEFINE_SUBST | |
747 | represented by SUBST_ELEM and this attribute has value SUBST_TRUE. | |
748 | DEFINE_SUBST isn't applied to patterns without such attribute. In other | |
749 | words, we suppose the default value of the attribute to be 'no' since it is | |
e53b6e56 | 750 | always generated automatically in read-rtl.cc. */ |
477c104e | 751 | static bool |
99b1c316 | 752 | has_subst_attribute (class queue_elem *elem, class queue_elem *subst_elem) |
477c104e MK |
753 | { |
754 | rtvec attrs_vec = XVEC (elem->data, 4); | |
755 | const char *value, *subst_name = XSTR (subst_elem->data, 0); | |
756 | int i; | |
757 | ||
758 | if (! attrs_vec) | |
759 | return false; | |
760 | ||
761 | for (i = GET_NUM_ELEM (attrs_vec) - 1; i >= 0; --i) | |
762 | { | |
763 | rtx cur_attr = RTVEC_ELT (attrs_vec, i); | |
764 | switch (GET_CODE (cur_attr)) | |
765 | { | |
766 | case SET_ATTR: | |
767 | if (strcmp (XSTR (cur_attr, 0), subst_name) == 0) | |
768 | { | |
769 | value = XSTR (cur_attr, 1); | |
770 | goto found; | |
771 | } | |
772 | break; | |
773 | ||
774 | case SET: | |
775 | if (GET_CODE (SET_DEST (cur_attr)) != ATTR | |
776 | || strcmp (XSTR (SET_DEST (cur_attr), 0), subst_name) != 0) | |
777 | break; | |
778 | cur_attr = SET_SRC (cur_attr); | |
779 | if (GET_CODE (cur_attr) == CONST_STRING) | |
780 | { | |
781 | value = XSTR (cur_attr, 0); | |
782 | goto found; | |
783 | } | |
784 | ||
785 | /* Only (set_attr "subst" "yes/no") and | |
786 | (set (attr "subst" (const_string "yes/no"))) | |
787 | are currently allowed. */ | |
cc472607 | 788 | error_at (elem->loc, "unsupported value for `%s'", subst_name); |
477c104e MK |
789 | return false; |
790 | ||
791 | case SET_ATTR_ALTERNATIVE: | |
12f78d8b KT |
792 | if (strcmp (XSTR (cur_attr, 0), subst_name) == 0) |
793 | error_at (elem->loc, | |
794 | "%s: `set_attr_alternative' is unsupported by " | |
795 | "`define_subst'", XSTR (elem->data, 0)); | |
477c104e MK |
796 | return false; |
797 | ||
798 | ||
799 | default: | |
800 | gcc_unreachable (); | |
801 | } | |
802 | } | |
803 | ||
804 | return false; | |
805 | ||
806 | found: | |
807 | if (strcmp (value, subst_true) == 0) | |
808 | return true; | |
809 | if (strcmp (value, subst_false) == 0) | |
810 | return false; | |
811 | ||
cc472607 RS |
812 | error_at (elem->loc, "unknown value `%s' for `%s' attribute", |
813 | value, subst_name); | |
477c104e MK |
814 | return false; |
815 | } | |
816 | ||
817 | /* Compare RTL-template of original define_insn X to input RTL-template of | |
818 | define_subst PT. Return 1 if the templates match, 0 otherwise. | |
819 | During the comparison, the routine also fills global_array OPERAND_DATA. */ | |
820 | static bool | |
cc472607 | 821 | subst_pattern_match (rtx x, rtx pt, file_location loc) |
477c104e MK |
822 | { |
823 | RTX_CODE code, code_pt; | |
824 | int i, j, len; | |
825 | const char *fmt, *pred_name; | |
826 | ||
827 | code = GET_CODE (x); | |
828 | code_pt = GET_CODE (pt); | |
829 | ||
830 | if (code_pt == MATCH_OPERAND) | |
831 | { | |
832 | /* MATCH_DUP, and MATCH_OP_DUP don't have a specified mode, so we | |
833 | always accept them. */ | |
834 | if (GET_MODE (pt) != VOIDmode && GET_MODE (x) != GET_MODE (pt) | |
835 | && (code != MATCH_DUP && code != MATCH_OP_DUP)) | |
836 | return false; /* Modes don't match. */ | |
837 | ||
838 | if (code == MATCH_OPERAND) | |
839 | { | |
840 | pred_name = XSTR (pt, 1); | |
841 | if (pred_name[0] != 0) | |
842 | { | |
843 | const struct pred_data *pred_pt = lookup_predicate (pred_name); | |
844 | if (!pred_pt || pred_pt != lookup_predicate (XSTR (x, 1))) | |
845 | return false; /* Predicates don't match. */ | |
846 | } | |
847 | } | |
848 | ||
849 | gcc_assert (XINT (pt, 0) >= 0 && XINT (pt, 0) < MAX_OPERANDS); | |
850 | operand_data[XINT (pt, 0)] = x; | |
851 | return true; | |
852 | } | |
853 | ||
854 | if (code_pt == MATCH_OPERATOR) | |
855 | { | |
856 | int x_vecexp_pos = -1; | |
857 | ||
858 | /* Compare modes. */ | |
859 | if (GET_MODE (pt) != VOIDmode && GET_MODE (x) != GET_MODE (pt)) | |
860 | return false; | |
861 | ||
862 | /* In case X is also match_operator, compare predicates. */ | |
863 | if (code == MATCH_OPERATOR) | |
864 | { | |
865 | pred_name = XSTR (pt, 1); | |
866 | if (pred_name[0] != 0) | |
867 | { | |
868 | const struct pred_data *pred_pt = lookup_predicate (pred_name); | |
869 | if (!pred_pt || pred_pt != lookup_predicate (XSTR (x, 1))) | |
870 | return false; | |
871 | } | |
872 | } | |
873 | ||
874 | /* Compare operands. | |
875 | MATCH_OPERATOR in input template could match in original template | |
876 | either 1) MATCH_OPERAND, 2) UNSPEC, 3) ordinary operation (like PLUS). | |
877 | In the first case operands are at (XVECEXP (x, 2, j)), in the second | |
878 | - at (XVECEXP (x, 0, j)), in the last one - (XEXP (x, j)). | |
879 | X_VECEXP_POS variable shows, where to look for these operands. */ | |
880 | if (code == UNSPEC | |
881 | || code == UNSPEC_VOLATILE) | |
882 | x_vecexp_pos = 0; | |
883 | else if (code == MATCH_OPERATOR) | |
884 | x_vecexp_pos = 2; | |
885 | else | |
886 | x_vecexp_pos = -1; | |
887 | ||
888 | /* MATCH_OPERATOR or UNSPEC case. */ | |
889 | if (x_vecexp_pos >= 0) | |
890 | { | |
891 | /* Compare operands number in X and PT. */ | |
892 | if (XVECLEN (x, x_vecexp_pos) != XVECLEN (pt, 2)) | |
893 | return false; | |
894 | for (j = 0; j < XVECLEN (pt, 2); j++) | |
895 | if (!subst_pattern_match (XVECEXP (x, x_vecexp_pos, j), | |
cc472607 | 896 | XVECEXP (pt, 2, j), loc)) |
477c104e MK |
897 | return false; |
898 | } | |
899 | ||
900 | /* Ordinary operator. */ | |
901 | else | |
902 | { | |
903 | /* Compare operands number in X and PT. | |
904 | We count operands differently for X and PT since we compare | |
905 | an operator (with operands directly in RTX) and MATCH_OPERATOR | |
906 | (that has a vector with operands). */ | |
907 | if (GET_RTX_LENGTH (code) != XVECLEN (pt, 2)) | |
908 | return false; | |
909 | for (j = 0; j < XVECLEN (pt, 2); j++) | |
cc472607 | 910 | if (!subst_pattern_match (XEXP (x, j), XVECEXP (pt, 2, j), loc)) |
477c104e MK |
911 | return false; |
912 | } | |
913 | ||
914 | /* Store the operand to OPERAND_DATA array. */ | |
915 | gcc_assert (XINT (pt, 0) >= 0 && XINT (pt, 0) < MAX_OPERANDS); | |
916 | operand_data[XINT (pt, 0)] = x; | |
917 | return true; | |
918 | } | |
919 | ||
920 | if (code_pt == MATCH_PAR_DUP | |
921 | || code_pt == MATCH_DUP | |
922 | || code_pt == MATCH_OP_DUP | |
923 | || code_pt == MATCH_SCRATCH | |
924 | || code_pt == MATCH_PARALLEL) | |
925 | { | |
926 | /* Currently interface for these constructions isn't defined - | |
927 | probably they aren't needed in input template of define_subst at all. | |
928 | So, for now their usage in define_subst is forbidden. */ | |
cc472607 RS |
929 | error_at (loc, "%s cannot be used in define_subst", |
930 | GET_RTX_NAME (code_pt)); | |
477c104e MK |
931 | } |
932 | ||
933 | gcc_assert (code != MATCH_PAR_DUP | |
934 | && code_pt != MATCH_DUP | |
935 | && code_pt != MATCH_OP_DUP | |
936 | && code_pt != MATCH_SCRATCH | |
937 | && code_pt != MATCH_PARALLEL | |
938 | && code_pt != MATCH_OPERAND | |
939 | && code_pt != MATCH_OPERATOR); | |
940 | /* If PT is none of the handled above, then we match only expressions with | |
941 | the same code in X. */ | |
942 | if (code != code_pt) | |
943 | return false; | |
944 | ||
945 | fmt = GET_RTX_FORMAT (code_pt); | |
946 | len = GET_RTX_LENGTH (code_pt); | |
947 | ||
948 | for (i = 0; i < len; i++) | |
949 | { | |
950 | if (fmt[i] == '0') | |
951 | break; | |
952 | ||
953 | switch (fmt[i]) | |
954 | { | |
91914e56 | 955 | case 'r': case 'p': case 'i': case 'w': case 's': |
477c104e MK |
956 | continue; |
957 | ||
958 | case 'e': case 'u': | |
cc472607 | 959 | if (!subst_pattern_match (XEXP (x, i), XEXP (pt, i), loc)) |
477c104e MK |
960 | return false; |
961 | break; | |
962 | case 'E': | |
963 | { | |
964 | if (XVECLEN (x, i) != XVECLEN (pt, i)) | |
965 | return false; | |
966 | for (j = 0; j < XVECLEN (pt, i); j++) | |
cc472607 RS |
967 | if (!subst_pattern_match (XVECEXP (x, i, j), |
968 | XVECEXP (pt, i, j), loc)) | |
477c104e MK |
969 | return false; |
970 | break; | |
971 | } | |
972 | default: | |
973 | gcc_unreachable (); | |
974 | } | |
975 | } | |
976 | ||
977 | return true; | |
978 | } | |
979 | ||
3262c1f5 RH |
980 | /* Examine the attribute "predicable"; discover its boolean values |
981 | and its default. */ | |
982 | ||
983 | static void | |
3d7aafde | 984 | identify_predicable_attribute (void) |
3262c1f5 | 985 | { |
99b1c316 | 986 | class queue_elem *elem; |
d6edb99e | 987 | char *p_true, *p_false; |
3262c1f5 | 988 | const char *value; |
3262c1f5 RH |
989 | |
990 | /* Look for the DEFINE_ATTR for `predicable', which must exist. */ | |
991 | for (elem = define_attr_queue; elem ; elem = elem->next) | |
992 | if (strcmp (XSTR (elem->data, 0), "predicable") == 0) | |
993 | goto found; | |
994 | ||
cc472607 RS |
995 | error_at (define_cond_exec_queue->loc, |
996 | "attribute `predicable' not defined"); | |
3262c1f5 RH |
997 | return; |
998 | ||
999 | found: | |
1000 | value = XSTR (elem->data, 1); | |
1dcd444b | 1001 | p_false = xstrdup (value); |
d6edb99e ZW |
1002 | p_true = strchr (p_false, ','); |
1003 | if (p_true == NULL || strchr (++p_true, ',') != NULL) | |
3262c1f5 | 1004 | { |
cc472607 | 1005 | error_at (elem->loc, "attribute `predicable' is not a boolean"); |
04695783 | 1006 | free (p_false); |
3262c1f5 RH |
1007 | return; |
1008 | } | |
d6edb99e | 1009 | p_true[-1] = '\0'; |
3262c1f5 | 1010 | |
d6edb99e ZW |
1011 | predicable_true = p_true; |
1012 | predicable_false = p_false; | |
3262c1f5 RH |
1013 | |
1014 | switch (GET_CODE (XEXP (elem->data, 2))) | |
1015 | { | |
1016 | case CONST_STRING: | |
1017 | value = XSTR (XEXP (elem->data, 2), 0); | |
1018 | break; | |
1019 | ||
1020 | case CONST: | |
cc472607 | 1021 | error_at (elem->loc, "attribute `predicable' cannot be const"); |
04695783 | 1022 | free (p_false); |
3262c1f5 RH |
1023 | return; |
1024 | ||
1025 | default: | |
cc472607 RS |
1026 | error_at (elem->loc, |
1027 | "attribute `predicable' must have a constant default"); | |
04695783 | 1028 | free (p_false); |
3262c1f5 RH |
1029 | return; |
1030 | } | |
1031 | ||
d6edb99e | 1032 | if (strcmp (value, p_true) == 0) |
3262c1f5 | 1033 | predicable_default = 1; |
d6edb99e | 1034 | else if (strcmp (value, p_false) == 0) |
3262c1f5 RH |
1035 | predicable_default = 0; |
1036 | else | |
1037 | { | |
cc472607 RS |
1038 | error_at (elem->loc, "unknown value `%s' for `predicable' attribute", |
1039 | value); | |
04695783 | 1040 | free (p_false); |
3262c1f5 RH |
1041 | } |
1042 | } | |
1043 | ||
1044 | /* Return the number of alternatives in constraint S. */ | |
1045 | ||
1046 | static int | |
3d7aafde | 1047 | n_alternatives (const char *s) |
3262c1f5 RH |
1048 | { |
1049 | int n = 1; | |
1050 | ||
1051 | if (s) | |
1052 | while (*s) | |
1053 | n += (*s++ == ','); | |
1054 | ||
1055 | return n; | |
1056 | } | |
1057 | ||
477c104e MK |
1058 | /* The routine scans rtl PATTERN, find match_operand in it and counts |
1059 | number of alternatives. If PATTERN contains several match_operands | |
1060 | with different number of alternatives, error is emitted, and the | |
1061 | routine returns 0. If all match_operands in PATTERN have the same | |
1062 | number of alternatives, it's stored in N_ALT, and the routine returns 1. | |
cc472607 | 1063 | LOC is the location of PATTERN, for error reporting. */ |
477c104e | 1064 | static int |
cc472607 | 1065 | get_alternatives_number (rtx pattern, int *n_alt, file_location loc) |
477c104e MK |
1066 | { |
1067 | const char *fmt; | |
1068 | enum rtx_code code; | |
1069 | int i, j, len; | |
1070 | ||
1071 | if (!n_alt) | |
1072 | return 0; | |
1073 | ||
1074 | code = GET_CODE (pattern); | |
1075 | switch (code) | |
1076 | { | |
1077 | case MATCH_OPERAND: | |
1078 | i = n_alternatives (XSTR (pattern, 2)); | |
1079 | /* n_alternatives returns 1 if constraint string is empty - | |
1080 | here we fix it up. */ | |
1081 | if (!*(XSTR (pattern, 2))) | |
1082 | i = 0; | |
1083 | if (*n_alt <= 0) | |
1084 | *n_alt = i; | |
1085 | ||
1086 | else if (i && i != *n_alt) | |
1087 | { | |
cc472607 RS |
1088 | error_at (loc, "wrong number of alternatives in operand %d", |
1089 | XINT (pattern, 0)); | |
477c104e MK |
1090 | return 0; |
1091 | } | |
1092 | ||
1093 | default: | |
1094 | break; | |
1095 | } | |
1096 | ||
1097 | fmt = GET_RTX_FORMAT (code); | |
1098 | len = GET_RTX_LENGTH (code); | |
1099 | for (i = 0; i < len; i++) | |
1100 | { | |
1101 | switch (fmt[i]) | |
1102 | { | |
1103 | case 'e': case 'u': | |
cc472607 RS |
1104 | if (!get_alternatives_number (XEXP (pattern, i), n_alt, loc)) |
1105 | return 0; | |
477c104e MK |
1106 | break; |
1107 | ||
1108 | case 'V': | |
1109 | if (XVEC (pattern, i) == NULL) | |
1110 | break; | |
191816a3 | 1111 | /* FALLTHRU */ |
477c104e MK |
1112 | |
1113 | case 'E': | |
1114 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
cc472607 RS |
1115 | if (!get_alternatives_number (XVECEXP (pattern, i, j), n_alt, loc)) |
1116 | return 0; | |
477c104e MK |
1117 | break; |
1118 | ||
91914e56 RS |
1119 | case 'r': case 'p': case 'i': case 'w': |
1120 | case '0': case 's': case 'S': case 'T': | |
477c104e MK |
1121 | break; |
1122 | ||
1123 | default: | |
1124 | gcc_unreachable (); | |
1125 | } | |
1126 | } | |
1127 | return 1; | |
1128 | } | |
1129 | ||
3262c1f5 RH |
1130 | /* Determine how many alternatives there are in INSN, and how many |
1131 | operands. */ | |
1132 | ||
1133 | static void | |
3d7aafde | 1134 | collect_insn_data (rtx pattern, int *palt, int *pmax) |
3262c1f5 RH |
1135 | { |
1136 | const char *fmt; | |
1137 | enum rtx_code code; | |
1138 | int i, j, len; | |
1139 | ||
1140 | code = GET_CODE (pattern); | |
1141 | switch (code) | |
1142 | { | |
1143 | case MATCH_OPERAND: | |
b7e2dd6f BS |
1144 | case MATCH_SCRATCH: |
1145 | i = n_alternatives (XSTR (pattern, code == MATCH_SCRATCH ? 1 : 2)); | |
892ecf92 | 1146 | *palt = (i > *palt ? i : *palt); |
5d3cc252 | 1147 | /* Fall through. */ |
3262c1f5 RH |
1148 | |
1149 | case MATCH_OPERATOR: | |
3262c1f5 | 1150 | case MATCH_PARALLEL: |
3262c1f5 RH |
1151 | i = XINT (pattern, 0); |
1152 | if (i > *pmax) | |
1153 | *pmax = i; | |
1154 | break; | |
1155 | ||
1156 | default: | |
1157 | break; | |
1158 | } | |
1159 | ||
1160 | fmt = GET_RTX_FORMAT (code); | |
1161 | len = GET_RTX_LENGTH (code); | |
1162 | for (i = 0; i < len; i++) | |
1163 | { | |
1164 | switch (fmt[i]) | |
1165 | { | |
1166 | case 'e': case 'u': | |
1167 | collect_insn_data (XEXP (pattern, i), palt, pmax); | |
1168 | break; | |
1169 | ||
1170 | case 'V': | |
1171 | if (XVEC (pattern, i) == NULL) | |
1172 | break; | |
5d3cc252 | 1173 | /* Fall through. */ |
3262c1f5 RH |
1174 | case 'E': |
1175 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1176 | collect_insn_data (XVECEXP (pattern, i, j), palt, pmax); | |
1177 | break; | |
1178 | ||
91914e56 RS |
1179 | case 'r': case 'p': case 'i': case 'w': |
1180 | case '0': case 's': case 'S': case 'T': | |
3262c1f5 RH |
1181 | break; |
1182 | ||
1183 | default: | |
b2d59f6f | 1184 | gcc_unreachable (); |
3262c1f5 RH |
1185 | } |
1186 | } | |
1187 | } | |
1188 | ||
1189 | static rtx | |
cc472607 RS |
1190 | alter_predicate_for_insn (rtx pattern, int alt, int max_op, |
1191 | file_location loc) | |
3262c1f5 RH |
1192 | { |
1193 | const char *fmt; | |
1194 | enum rtx_code code; | |
1195 | int i, j, len; | |
1196 | ||
1197 | code = GET_CODE (pattern); | |
1198 | switch (code) | |
1199 | { | |
1200 | case MATCH_OPERAND: | |
1201 | { | |
1202 | const char *c = XSTR (pattern, 2); | |
1203 | ||
1204 | if (n_alternatives (c) != 1) | |
1205 | { | |
cc472607 RS |
1206 | error_at (loc, "too many alternatives for operand %d", |
1207 | XINT (pattern, 0)); | |
3262c1f5 RH |
1208 | return NULL; |
1209 | } | |
1210 | ||
1211 | /* Replicate C as needed to fill out ALT alternatives. */ | |
1212 | if (c && *c && alt > 1) | |
1213 | { | |
1214 | size_t c_len = strlen (c); | |
1215 | size_t len = alt * (c_len + 1); | |
477c104e | 1216 | char *new_c = XNEWVEC (char, len); |
3262c1f5 RH |
1217 | |
1218 | memcpy (new_c, c, c_len); | |
1219 | for (i = 1; i < alt; ++i) | |
1220 | { | |
1221 | new_c[i * (c_len + 1) - 1] = ','; | |
1222 | memcpy (&new_c[i * (c_len + 1)], c, c_len); | |
1223 | } | |
1224 | new_c[len - 1] = '\0'; | |
1225 | XSTR (pattern, 2) = new_c; | |
1226 | } | |
1227 | } | |
5d3cc252 | 1228 | /* Fall through. */ |
3262c1f5 RH |
1229 | |
1230 | case MATCH_OPERATOR: | |
1231 | case MATCH_SCRATCH: | |
1232 | case MATCH_PARALLEL: | |
3816864d | 1233 | case MATCH_DUP: |
3262c1f5 RH |
1234 | XINT (pattern, 0) += max_op; |
1235 | break; | |
1236 | ||
1237 | default: | |
1238 | break; | |
1239 | } | |
1240 | ||
1241 | fmt = GET_RTX_FORMAT (code); | |
1242 | len = GET_RTX_LENGTH (code); | |
1243 | for (i = 0; i < len; i++) | |
1244 | { | |
1245 | rtx r; | |
1246 | ||
1247 | switch (fmt[i]) | |
1248 | { | |
1249 | case 'e': case 'u': | |
cc472607 | 1250 | r = alter_predicate_for_insn (XEXP (pattern, i), alt, max_op, loc); |
3262c1f5 RH |
1251 | if (r == NULL) |
1252 | return r; | |
1253 | break; | |
1254 | ||
1255 | case 'E': | |
1256 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1257 | { | |
1258 | r = alter_predicate_for_insn (XVECEXP (pattern, i, j), | |
cc472607 | 1259 | alt, max_op, loc); |
3262c1f5 RH |
1260 | if (r == NULL) |
1261 | return r; | |
1262 | } | |
1263 | break; | |
1264 | ||
91914e56 | 1265 | case 'r': case 'p': case 'i': case 'w': case '0': case 's': |
3262c1f5 RH |
1266 | break; |
1267 | ||
1268 | default: | |
b2d59f6f | 1269 | gcc_unreachable (); |
3262c1f5 RH |
1270 | } |
1271 | } | |
1272 | ||
1273 | return pattern; | |
1274 | } | |
1275 | ||
477c104e MK |
1276 | /* Duplicate constraints in PATTERN. If pattern is from original |
1277 | rtl-template, we need to duplicate each alternative - for that we | |
1278 | need to use duplicate_each_alternative () as a functor ALTER. | |
1279 | If pattern is from output-pattern of define_subst, we need to | |
1280 | duplicate constraints in another way - with duplicate_alternatives (). | |
1281 | N_DUP is multiplication factor. */ | |
1282 | static rtx | |
1283 | alter_constraints (rtx pattern, int n_dup, constraints_handler_t alter) | |
1284 | { | |
1285 | const char *fmt; | |
1286 | enum rtx_code code; | |
1287 | int i, j, len; | |
1288 | ||
1289 | code = GET_CODE (pattern); | |
1290 | switch (code) | |
1291 | { | |
1292 | case MATCH_OPERAND: | |
1293 | XSTR (pattern, 2) = alter (XSTR (pattern, 2), n_dup); | |
1294 | break; | |
dd1ef00c JR |
1295 | case MATCH_SCRATCH: |
1296 | XSTR (pattern, 1) = alter (XSTR (pattern, 1), n_dup); | |
1297 | break; | |
477c104e MK |
1298 | |
1299 | default: | |
1300 | break; | |
1301 | } | |
1302 | ||
1303 | fmt = GET_RTX_FORMAT (code); | |
1304 | len = GET_RTX_LENGTH (code); | |
1305 | for (i = 0; i < len; i++) | |
1306 | { | |
1307 | rtx r; | |
1308 | ||
1309 | switch (fmt[i]) | |
1310 | { | |
1311 | case 'e': case 'u': | |
1312 | r = alter_constraints (XEXP (pattern, i), n_dup, alter); | |
1313 | if (r == NULL) | |
1314 | return r; | |
1315 | break; | |
1316 | ||
1317 | case 'E': | |
1318 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1319 | { | |
1320 | r = alter_constraints (XVECEXP (pattern, i, j), n_dup, alter); | |
1321 | if (r == NULL) | |
1322 | return r; | |
1323 | } | |
1324 | break; | |
1325 | ||
91914e56 | 1326 | case 'r': case 'p': case 'i': case 'w': case '0': case 's': |
477c104e MK |
1327 | break; |
1328 | ||
1329 | default: | |
1330 | break; | |
1331 | } | |
1332 | } | |
1333 | ||
1334 | return pattern; | |
1335 | } | |
1336 | ||
3262c1f5 | 1337 | static const char * |
99b1c316 MS |
1338 | alter_test_for_insn (class queue_elem *ce_elem, |
1339 | class queue_elem *insn_elem) | |
3262c1f5 | 1340 | { |
b78027d1 DM |
1341 | return rtx_reader_ptr->join_c_conditions (XSTR (ce_elem->data, 1), |
1342 | XSTR (insn_elem->data, 2)); | |
3262c1f5 RH |
1343 | } |
1344 | ||
0bddee8e BS |
1345 | /* Modify VAL, which is an attribute expression for the "enabled" attribute, |
1346 | to take "ce_enabled" into account. Return the new expression. */ | |
1347 | static rtx | |
1348 | modify_attr_enabled_ce (rtx val) | |
1349 | { | |
1350 | rtx eq_attr, str; | |
1351 | rtx ite; | |
1352 | eq_attr = rtx_alloc (EQ_ATTR); | |
1353 | ite = rtx_alloc (IF_THEN_ELSE); | |
1354 | str = rtx_alloc (CONST_STRING); | |
1355 | ||
1356 | XSTR (eq_attr, 0) = "ce_enabled"; | |
1357 | XSTR (eq_attr, 1) = "yes"; | |
1358 | XSTR (str, 0) = "no"; | |
1359 | XEXP (ite, 0) = eq_attr; | |
1360 | XEXP (ite, 1) = val; | |
1361 | XEXP (ite, 2) = str; | |
1362 | ||
1363 | return ite; | |
1364 | } | |
1365 | ||
1366 | /* Alter the attribute vector of INSN, which is a COND_EXEC variant created | |
1367 | from a define_insn pattern. We must modify the "predicable" attribute | |
1368 | to be named "ce_enabled", and also change any "enabled" attribute that's | |
1369 | present so that it takes ce_enabled into account. | |
1370 | We rely on the fact that INSN was created with copy_rtx, and modify data | |
1371 | in-place. */ | |
1372 | ||
1373 | static void | |
1374 | alter_attrs_for_insn (rtx insn) | |
1375 | { | |
1376 | static bool global_changes_made = false; | |
1377 | rtvec vec = XVEC (insn, 4); | |
1378 | rtvec new_vec; | |
1379 | rtx val, set; | |
1380 | int num_elem; | |
1381 | int predicable_idx = -1; | |
1382 | int enabled_idx = -1; | |
1383 | int i; | |
1384 | ||
1385 | if (! vec) | |
1386 | return; | |
1387 | ||
1388 | num_elem = GET_NUM_ELEM (vec); | |
1389 | for (i = num_elem - 1; i >= 0; --i) | |
1390 | { | |
1391 | rtx sub = RTVEC_ELT (vec, i); | |
1392 | switch (GET_CODE (sub)) | |
1393 | { | |
1394 | case SET_ATTR: | |
1395 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
1396 | { | |
1397 | predicable_idx = i; | |
1398 | XSTR (sub, 0) = "ce_enabled"; | |
1399 | } | |
1400 | else if (strcmp (XSTR (sub, 0), "enabled") == 0) | |
1401 | { | |
1402 | enabled_idx = i; | |
1403 | XSTR (sub, 0) = "nonce_enabled"; | |
1404 | } | |
1405 | break; | |
1406 | ||
1407 | case SET_ATTR_ALTERNATIVE: | |
1408 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
1409 | /* We already give an error elsewhere. */ | |
1410 | return; | |
1411 | else if (strcmp (XSTR (sub, 0), "enabled") == 0) | |
1412 | { | |
1413 | enabled_idx = i; | |
1414 | XSTR (sub, 0) = "nonce_enabled"; | |
1415 | } | |
1416 | break; | |
1417 | ||
1418 | case SET: | |
1419 | if (GET_CODE (SET_DEST (sub)) != ATTR) | |
1420 | break; | |
1421 | if (strcmp (XSTR (SET_DEST (sub), 0), "predicable") == 0) | |
1422 | { | |
1423 | sub = SET_SRC (sub); | |
1424 | if (GET_CODE (sub) == CONST_STRING) | |
1425 | { | |
1426 | predicable_idx = i; | |
1427 | XSTR (sub, 0) = "ce_enabled"; | |
1428 | } | |
1429 | else | |
1430 | /* We already give an error elsewhere. */ | |
1431 | return; | |
1432 | break; | |
1433 | } | |
1434 | if (strcmp (XSTR (SET_DEST (sub), 0), "enabled") == 0) | |
1435 | { | |
1436 | enabled_idx = i; | |
1437 | XSTR (SET_DEST (sub), 0) = "nonce_enabled"; | |
1438 | } | |
1439 | break; | |
1440 | ||
1441 | default: | |
1442 | gcc_unreachable (); | |
1443 | } | |
1444 | } | |
1445 | if (predicable_idx == -1) | |
1446 | return; | |
1447 | ||
1448 | if (!global_changes_made) | |
1449 | { | |
99b1c316 | 1450 | class queue_elem *elem; |
477c104e | 1451 | |
0bddee8e BS |
1452 | global_changes_made = true; |
1453 | add_define_attr ("ce_enabled"); | |
1454 | add_define_attr ("nonce_enabled"); | |
1455 | ||
1456 | for (elem = define_attr_queue; elem ; elem = elem->next) | |
1457 | if (strcmp (XSTR (elem->data, 0), "enabled") == 0) | |
1458 | { | |
1459 | XEXP (elem->data, 2) | |
1460 | = modify_attr_enabled_ce (XEXP (elem->data, 2)); | |
1461 | } | |
1462 | } | |
1463 | if (enabled_idx == -1) | |
1464 | return; | |
1465 | ||
1466 | new_vec = rtvec_alloc (num_elem + 1); | |
1467 | for (i = 0; i < num_elem; i++) | |
1468 | RTVEC_ELT (new_vec, i) = RTVEC_ELT (vec, i); | |
1469 | val = rtx_alloc (IF_THEN_ELSE); | |
1470 | XEXP (val, 0) = rtx_alloc (EQ_ATTR); | |
1471 | XEXP (val, 1) = rtx_alloc (CONST_STRING); | |
1472 | XEXP (val, 2) = rtx_alloc (CONST_STRING); | |
1473 | XSTR (XEXP (val, 0), 0) = "nonce_enabled"; | |
1474 | XSTR (XEXP (val, 0), 1) = "yes"; | |
1475 | XSTR (XEXP (val, 1), 0) = "yes"; | |
1476 | XSTR (XEXP (val, 2), 0) = "no"; | |
1477 | set = rtx_alloc (SET); | |
1478 | SET_DEST (set) = rtx_alloc (ATTR); | |
1479 | XSTR (SET_DEST (set), 0) = "enabled"; | |
1480 | SET_SRC (set) = modify_attr_enabled_ce (val); | |
1481 | RTVEC_ELT (new_vec, i) = set; | |
1482 | XVEC (insn, 4) = new_vec; | |
1483 | } | |
1484 | ||
477c104e MK |
1485 | /* As number of constraints is changed after define_subst, we need to |
1486 | process attributes as well - we need to duplicate them the same way | |
1487 | that we duplicated constraints in original pattern | |
1488 | ELEM is a queue element, containing our rtl-template, | |
1489 | N_DUP - multiplication factor. */ | |
1490 | static void | |
99b1c316 | 1491 | alter_attrs_for_subst_insn (class queue_elem * elem, int n_dup) |
3262c1f5 | 1492 | { |
477c104e MK |
1493 | rtvec vec = XVEC (elem->data, 4); |
1494 | int num_elem; | |
1495 | int i; | |
1496 | ||
1497 | if (n_dup < 2 || ! vec) | |
1498 | return; | |
1499 | ||
1500 | num_elem = GET_NUM_ELEM (vec); | |
1501 | for (i = num_elem - 1; i >= 0; --i) | |
3262c1f5 | 1502 | { |
477c104e MK |
1503 | rtx sub = RTVEC_ELT (vec, i); |
1504 | switch (GET_CODE (sub)) | |
3262c1f5 | 1505 | { |
477c104e MK |
1506 | case SET_ATTR: |
1507 | if (strchr (XSTR (sub, 1), ',') != NULL) | |
1508 | XSTR (sub, 1) = duplicate_alternatives (XSTR (sub, 1), n_dup); | |
4839de55 | 1509 | break; |
477c104e MK |
1510 | |
1511 | case SET_ATTR_ALTERNATIVE: | |
1512 | case SET: | |
cc472607 RS |
1513 | error_at (elem->loc, |
1514 | "%s: `define_subst' does not support attributes " | |
1515 | "assigned by `set' and `set_attr_alternative'", | |
1516 | XSTR (elem->data, 0)); | |
477c104e MK |
1517 | return; |
1518 | ||
1519 | default: | |
1520 | gcc_unreachable (); | |
1521 | } | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | /* Adjust all of the operand numbers in SRC to match the shift they'll | |
1526 | get from an operand displacement of DISP. Return a pointer after the | |
1527 | adjusted string. */ | |
1528 | ||
1529 | static char * | |
1530 | shift_output_template (char *dest, const char *src, int disp) | |
1531 | { | |
1532 | while (*src) | |
1533 | { | |
1534 | char c = *src++; | |
1535 | *dest++ = c; | |
1536 | if (c == '%') | |
1537 | { | |
1538 | c = *src++; | |
1539 | if (ISDIGIT ((unsigned char) c)) | |
1540 | c += disp; | |
1541 | else if (ISALPHA (c)) | |
1542 | { | |
53ed1a12 | 1543 | *dest++ = c; |
1ad463f4 | 1544 | c = *src++ + disp; |
3262c1f5 | 1545 | } |
53ed1a12 | 1546 | *dest++ = c; |
3262c1f5 RH |
1547 | } |
1548 | } | |
1549 | ||
53ed1a12 | 1550 | return dest; |
3262c1f5 RH |
1551 | } |
1552 | ||
1553 | static const char * | |
99b1c316 MS |
1554 | alter_output_for_insn (class queue_elem *ce_elem, |
1555 | class queue_elem *insn_elem, | |
3d7aafde | 1556 | int alt, int max_op) |
3262c1f5 RH |
1557 | { |
1558 | const char *ce_out, *insn_out; | |
53ed1a12 | 1559 | char *result, *p; |
3262c1f5 RH |
1560 | size_t len, ce_len, insn_len; |
1561 | ||
1562 | /* ??? Could coordinate with genoutput to not duplicate code here. */ | |
1563 | ||
1564 | ce_out = XSTR (ce_elem->data, 2); | |
66621f9e | 1565 | insn_out = XTMPL (insn_elem->data, 3); |
3262c1f5 RH |
1566 | if (!ce_out || *ce_out == '\0') |
1567 | return insn_out; | |
1568 | ||
1569 | ce_len = strlen (ce_out); | |
1570 | insn_len = strlen (insn_out); | |
1571 | ||
1572 | if (*insn_out == '*') | |
1573 | /* You must take care of the predicate yourself. */ | |
1574 | return insn_out; | |
1575 | ||
1576 | if (*insn_out == '@') | |
1577 | { | |
1578 | len = (ce_len + 1) * alt + insn_len + 1; | |
477c104e | 1579 | p = result = XNEWVEC (char, len); |
3262c1f5 RH |
1580 | |
1581 | do | |
1582 | { | |
1583 | do | |
1584 | *p++ = *insn_out++; | |
1585 | while (ISSPACE ((unsigned char) *insn_out)); | |
1586 | ||
1587 | if (*insn_out != '#') | |
1588 | { | |
1589 | p = shift_output_template (p, ce_out, max_op); | |
1590 | *p++ = ' '; | |
1591 | } | |
1592 | ||
1593 | do | |
1594 | *p++ = *insn_out++; | |
1595 | while (*insn_out && *insn_out != '\n'); | |
1596 | } | |
1597 | while (*insn_out); | |
1598 | *p = '\0'; | |
1599 | } | |
1600 | else | |
1601 | { | |
1602 | len = ce_len + 1 + insn_len + 1; | |
53ed1a12 | 1603 | result = XNEWVEC (char, len); |
3262c1f5 | 1604 | |
53ed1a12 | 1605 | p = shift_output_template (result, ce_out, max_op); |
3262c1f5 RH |
1606 | *p++ = ' '; |
1607 | memcpy (p, insn_out, insn_len + 1); | |
1608 | } | |
1609 | ||
53ed1a12 | 1610 | return result; |
3262c1f5 RH |
1611 | } |
1612 | ||
477c104e MK |
1613 | /* From string STR "a,b,c" produce "a,b,c,a,b,c,a,b,c", i.e. original |
1614 | string, duplicated N_DUP times. */ | |
1615 | ||
1616 | static const char * | |
1617 | duplicate_alternatives (const char * str, int n_dup) | |
1618 | { | |
1619 | int i, len, new_len; | |
1620 | char *result, *sp; | |
1621 | const char *cp; | |
1622 | ||
1623 | if (n_dup < 2) | |
1624 | return str; | |
1625 | ||
1626 | while (ISSPACE (*str)) | |
1627 | str++; | |
1628 | ||
1629 | if (*str == '\0') | |
1630 | return str; | |
1631 | ||
1632 | cp = str; | |
1633 | len = strlen (str); | |
1634 | new_len = (len + 1) * n_dup; | |
1635 | ||
1636 | sp = result = XNEWVEC (char, new_len); | |
1637 | ||
1638 | /* Global modifier characters mustn't be duplicated: skip if found. */ | |
1639 | if (*cp == '=' || *cp == '+' || *cp == '%') | |
1640 | { | |
1641 | *sp++ = *cp++; | |
1642 | len--; | |
1643 | } | |
1644 | ||
1645 | /* Copy original constraints N_DUP times. */ | |
1646 | for (i = 0; i < n_dup; i++, sp += len+1) | |
1647 | { | |
1648 | memcpy (sp, cp, len); | |
1649 | *(sp+len) = (i == n_dup - 1) ? '\0' : ','; | |
1650 | } | |
1651 | ||
1652 | return result; | |
1653 | } | |
1654 | ||
1655 | /* From string STR "a,b,c" produce "a,a,a,b,b,b,c,c,c", i.e. string where | |
1656 | each alternative from the original string is duplicated N_DUP times. */ | |
1657 | static const char * | |
1658 | duplicate_each_alternative (const char * str, int n_dup) | |
1659 | { | |
1660 | int i, len, new_len; | |
1661 | char *result, *sp, *ep, *cp; | |
1662 | ||
1663 | if (n_dup < 2) | |
1664 | return str; | |
1665 | ||
1666 | while (ISSPACE (*str)) | |
1667 | str++; | |
1668 | ||
1669 | if (*str == '\0') | |
1670 | return str; | |
1671 | ||
1672 | cp = xstrdup (str); | |
1673 | ||
1674 | new_len = (strlen (cp) + 1) * n_dup; | |
1675 | ||
1676 | sp = result = XNEWVEC (char, new_len); | |
1677 | ||
1678 | /* Global modifier characters mustn't be duplicated: skip if found. */ | |
1679 | if (*cp == '=' || *cp == '+' || *cp == '%') | |
1680 | *sp++ = *cp++; | |
1681 | ||
1682 | do | |
1683 | { | |
1684 | if ((ep = strchr (cp, ',')) != NULL) | |
1685 | *ep++ = '\0'; | |
1686 | len = strlen (cp); | |
1687 | ||
1688 | /* Copy a constraint N_DUP times. */ | |
1689 | for (i = 0; i < n_dup; i++, sp += len + 1) | |
1690 | { | |
1691 | memcpy (sp, cp, len); | |
1692 | *(sp+len) = (ep == NULL && i == n_dup - 1) ? '\0' : ','; | |
1693 | } | |
1694 | ||
1695 | cp = ep; | |
1696 | } | |
1697 | while (cp != NULL); | |
1698 | ||
1699 | return result; | |
1700 | } | |
1701 | ||
1702 | /* Alter the output of INSN whose pattern was modified by | |
1703 | DEFINE_SUBST. We must replicate output strings according | |
1704 | to the new number of alternatives ALT in substituted pattern. | |
1705 | If ALT equals 1, output has one alternative or defined by C | |
1706 | code, then output is returned without any changes. */ | |
1707 | ||
1708 | static const char * | |
1709 | alter_output_for_subst_insn (rtx insn, int alt) | |
1710 | { | |
c5cb7968 JJ |
1711 | const char *insn_out, *old_out; |
1712 | char *new_out, *cp; | |
1713 | size_t old_len, new_len; | |
1714 | int j; | |
477c104e MK |
1715 | |
1716 | insn_out = XTMPL (insn, 3); | |
1717 | ||
c5cb7968 | 1718 | if (alt < 2 || *insn_out != '@') |
477c104e MK |
1719 | return insn_out; |
1720 | ||
c5cb7968 JJ |
1721 | old_out = insn_out + 1; |
1722 | while (ISSPACE (*old_out)) | |
1723 | old_out++; | |
1724 | old_len = strlen (old_out); | |
477c104e | 1725 | |
c5cb7968 | 1726 | new_len = alt * (old_len + 1) + 1; |
477c104e MK |
1727 | |
1728 | new_out = XNEWVEC (char, new_len); | |
1729 | new_out[0] = '@'; | |
1730 | ||
c5cb7968 | 1731 | for (j = 0, cp = new_out + 1; j < alt; j++, cp += old_len + 1) |
477c104e | 1732 | { |
c5cb7968 JJ |
1733 | memcpy (cp, old_out, old_len); |
1734 | cp[old_len] = (j == alt - 1) ? '\0' : '\n'; | |
477c104e MK |
1735 | } |
1736 | ||
1737 | return new_out; | |
1738 | } | |
1739 | ||
3262c1f5 RH |
1740 | /* Replicate insns as appropriate for the given DEFINE_COND_EXEC. */ |
1741 | ||
1742 | static void | |
99b1c316 | 1743 | process_one_cond_exec (class queue_elem *ce_elem) |
3262c1f5 | 1744 | { |
99b1c316 | 1745 | class queue_elem *insn_elem; |
3262c1f5 RH |
1746 | for (insn_elem = define_insn_queue; insn_elem ; insn_elem = insn_elem->next) |
1747 | { | |
1748 | int alternatives, max_operand; | |
a406f566 | 1749 | rtx pred, insn, pattern, split; |
2f6c5b27 | 1750 | char *new_name; |
a406f566 | 1751 | int i; |
3262c1f5 RH |
1752 | |
1753 | if (! is_predicable (insn_elem)) | |
1754 | continue; | |
1755 | ||
1756 | alternatives = 1; | |
1757 | max_operand = -1; | |
1758 | collect_insn_data (insn_elem->data, &alternatives, &max_operand); | |
1759 | max_operand += 1; | |
1760 | ||
1761 | if (XVECLEN (ce_elem->data, 0) != 1) | |
1762 | { | |
cc472607 | 1763 | error_at (ce_elem->loc, "too many patterns in predicate"); |
3262c1f5 RH |
1764 | return; |
1765 | } | |
1766 | ||
1767 | pred = copy_rtx (XVECEXP (ce_elem->data, 0, 0)); | |
1768 | pred = alter_predicate_for_insn (pred, alternatives, max_operand, | |
cc472607 | 1769 | ce_elem->loc); |
3262c1f5 RH |
1770 | if (pred == NULL) |
1771 | return; | |
1772 | ||
1773 | /* Construct a new pattern for the new insn. */ | |
1774 | insn = copy_rtx (insn_elem->data); | |
2f6c5b27 SB |
1775 | new_name = XNEWVAR (char, strlen XSTR (insn_elem->data, 0) + 4); |
1776 | sprintf (new_name, "*p %s", XSTR (insn_elem->data, 0)); | |
1777 | XSTR (insn, 0) = new_name; | |
3262c1f5 RH |
1778 | pattern = rtx_alloc (COND_EXEC); |
1779 | XEXP (pattern, 0) = pred; | |
313d38e3 RS |
1780 | XEXP (pattern, 1) = add_implicit_parallel (XVEC (insn, 1)); |
1781 | XVEC (insn, 1) = rtvec_alloc (1); | |
1782 | XVECEXP (insn, 1, 0) = pattern; | |
3262c1f5 | 1783 | |
aadaf24e KT |
1784 | if (XVEC (ce_elem->data, 3) != NULL) |
1785 | { | |
1786 | rtvec attributes = rtvec_alloc (XVECLEN (insn, 4) | |
1787 | + XVECLEN (ce_elem->data, 3)); | |
1788 | int i = 0; | |
1789 | int j = 0; | |
1790 | for (i = 0; i < XVECLEN (insn, 4); i++) | |
1791 | RTVEC_ELT (attributes, i) = XVECEXP (insn, 4, i); | |
1792 | ||
1793 | for (j = 0; j < XVECLEN (ce_elem->data, 3); j++, i++) | |
1794 | RTVEC_ELT (attributes, i) = XVECEXP (ce_elem->data, 3, j); | |
1795 | ||
1796 | XVEC (insn, 4) = attributes; | |
1797 | } | |
1798 | ||
3262c1f5 | 1799 | XSTR (insn, 2) = alter_test_for_insn (ce_elem, insn_elem); |
66621f9e | 1800 | XTMPL (insn, 3) = alter_output_for_insn (ce_elem, insn_elem, |
3262c1f5 | 1801 | alternatives, max_operand); |
0bddee8e | 1802 | alter_attrs_for_insn (insn); |
3262c1f5 RH |
1803 | |
1804 | /* Put the new pattern on the `other' list so that it | |
1805 | (a) is not reprocessed by other define_cond_exec patterns | |
1806 | (b) appears after all normal define_insn patterns. | |
1807 | ||
1808 | ??? B is debatable. If one has normal insns that match | |
1809 | cond_exec patterns, they will be preferred over these | |
1810 | generated patterns. Whether this matters in practice, or if | |
1811 | it's a good thing, or whether we should thread these new | |
1812 | patterns into the define_insn chain just after their generator | |
1813 | is something we'll have to experiment with. */ | |
1814 | ||
cc472607 | 1815 | queue_pattern (insn, &other_tail, insn_elem->loc); |
a406f566 MM |
1816 | |
1817 | if (!insn_elem->split) | |
1818 | continue; | |
1819 | ||
1820 | /* If the original insn came from a define_insn_and_split, | |
9cf737f8 | 1821 | generate a new split to handle the predicated insn. */ |
a406f566 MM |
1822 | split = copy_rtx (insn_elem->split->data); |
1823 | /* Predicate the pattern matched by the split. */ | |
1824 | pattern = rtx_alloc (COND_EXEC); | |
1825 | XEXP (pattern, 0) = pred; | |
313d38e3 RS |
1826 | XEXP (pattern, 1) = add_implicit_parallel (XVEC (split, 0)); |
1827 | XVEC (split, 0) = rtvec_alloc (1); | |
1828 | XVECEXP (split, 0, 0) = pattern; | |
1829 | ||
a406f566 MM |
1830 | /* Predicate all of the insns generated by the split. */ |
1831 | for (i = 0; i < XVECLEN (split, 2); i++) | |
1832 | { | |
1833 | pattern = rtx_alloc (COND_EXEC); | |
1834 | XEXP (pattern, 0) = pred; | |
1835 | XEXP (pattern, 1) = XVECEXP (split, 2, i); | |
1836 | XVECEXP (split, 2, i) = pattern; | |
1837 | } | |
1838 | /* Add the new split to the queue. */ | |
cc472607 | 1839 | queue_pattern (split, &other_tail, insn_elem->split->loc); |
3262c1f5 RH |
1840 | } |
1841 | } | |
1842 | ||
477c104e MK |
1843 | /* Try to apply define_substs to the given ELEM. |
1844 | Only define_substs, specified via attributes would be applied. | |
1845 | If attribute, requiring define_subst, is set, but no define_subst | |
1846 | was applied, ELEM would be deleted. */ | |
1847 | ||
1848 | static void | |
99b1c316 MS |
1849 | process_substs_on_one_elem (class queue_elem *elem, |
1850 | class queue_elem *queue) | |
477c104e | 1851 | { |
99b1c316 | 1852 | class queue_elem *subst_elem; |
477c104e MK |
1853 | int i, j, patterns_match; |
1854 | ||
1855 | for (subst_elem = define_subst_queue; | |
1856 | subst_elem; subst_elem = subst_elem->next) | |
1857 | { | |
1858 | int alternatives, alternatives_subst; | |
1859 | rtx subst_pattern; | |
1860 | rtvec subst_pattern_vec; | |
1861 | ||
1862 | if (!has_subst_attribute (elem, subst_elem)) | |
1863 | continue; | |
1864 | ||
1865 | /* Compare original rtl-pattern from define_insn with input | |
1866 | pattern from define_subst. | |
1867 | Also, check if numbers of alternatives are the same in all | |
1868 | match_operands. */ | |
1869 | if (XVECLEN (elem->data, 1) != XVECLEN (subst_elem->data, 1)) | |
1870 | continue; | |
1871 | patterns_match = 1; | |
1872 | alternatives = -1; | |
1873 | alternatives_subst = -1; | |
1874 | for (j = 0; j < XVECLEN (elem->data, 1); j++) | |
1875 | { | |
1876 | if (!subst_pattern_match (XVECEXP (elem->data, 1, j), | |
1877 | XVECEXP (subst_elem->data, 1, j), | |
cc472607 | 1878 | subst_elem->loc)) |
477c104e MK |
1879 | { |
1880 | patterns_match = 0; | |
1881 | break; | |
1882 | } | |
1883 | ||
1884 | if (!get_alternatives_number (XVECEXP (elem->data, 1, j), | |
cc472607 | 1885 | &alternatives, subst_elem->loc)) |
477c104e MK |
1886 | { |
1887 | patterns_match = 0; | |
1888 | break; | |
1889 | } | |
1890 | } | |
1891 | ||
1892 | /* Check if numbers of alternatives are the same in all | |
1893 | match_operands in output template of define_subst. */ | |
1894 | for (j = 0; j < XVECLEN (subst_elem->data, 3); j++) | |
1895 | { | |
1896 | if (!get_alternatives_number (XVECEXP (subst_elem->data, 3, j), | |
1897 | &alternatives_subst, | |
cc472607 | 1898 | subst_elem->loc)) |
477c104e MK |
1899 | { |
1900 | patterns_match = 0; | |
1901 | break; | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | if (!patterns_match) | |
1906 | continue; | |
1907 | ||
1908 | /* Clear array in which we save occupied indexes of operands. */ | |
1909 | memset (used_operands_numbers, 0, sizeof (used_operands_numbers)); | |
1910 | ||
1911 | /* Create a pattern, based on the output one from define_subst. */ | |
1912 | subst_pattern_vec = rtvec_alloc (XVECLEN (subst_elem->data, 3)); | |
1913 | for (j = 0; j < XVECLEN (subst_elem->data, 3); j++) | |
1914 | { | |
1915 | subst_pattern = copy_rtx (XVECEXP (subst_elem->data, 3, j)); | |
1916 | ||
1917 | /* Duplicate constraints in substitute-pattern. */ | |
1918 | subst_pattern = alter_constraints (subst_pattern, alternatives, | |
1919 | duplicate_each_alternative); | |
1920 | ||
a7ba15ca | 1921 | subst_pattern = adjust_operands_numbers (subst_pattern); |
477c104e MK |
1922 | |
1923 | /* Substitute match_dup and match_op_dup in the new pattern and | |
1924 | duplicate constraints. */ | |
1925 | subst_pattern = subst_dup (subst_pattern, alternatives, | |
1926 | alternatives_subst); | |
1927 | ||
1928 | replace_duplicating_operands_in_pattern (subst_pattern); | |
1929 | ||
1930 | /* We don't need any constraints in DEFINE_EXPAND. */ | |
1931 | if (GET_CODE (elem->data) == DEFINE_EXPAND) | |
1932 | remove_constraints (subst_pattern); | |
1933 | ||
a7ba15ca | 1934 | RTVEC_ELT (subst_pattern_vec, j) = subst_pattern; |
477c104e MK |
1935 | } |
1936 | XVEC (elem->data, 1) = subst_pattern_vec; | |
1937 | ||
1938 | for (i = 0; i < MAX_OPERANDS; i++) | |
1939 | match_operand_entries_in_pattern[i] = NULL; | |
1940 | ||
1941 | if (GET_CODE (elem->data) == DEFINE_INSN) | |
1942 | { | |
1943 | XTMPL (elem->data, 3) = | |
1944 | alter_output_for_subst_insn (elem->data, alternatives_subst); | |
1945 | alter_attrs_for_subst_insn (elem, alternatives_subst); | |
1946 | } | |
1947 | ||
1948 | /* Recalculate condition, joining conditions from original and | |
1949 | DEFINE_SUBST input patterns. */ | |
b78027d1 DM |
1950 | XSTR (elem->data, 2) |
1951 | = rtx_reader_ptr->join_c_conditions (XSTR (subst_elem->data, 2), | |
1952 | XSTR (elem->data, 2)); | |
477c104e MK |
1953 | /* Mark that subst was applied by changing attribute from "yes" |
1954 | to "no". */ | |
1955 | change_subst_attribute (elem, subst_elem, subst_false); | |
1956 | } | |
1957 | ||
1958 | /* If ELEM contains a subst attribute with value "yes", then we | |
1959 | expected that a subst would be applied, but it wasn't - so, | |
1960 | we need to remove that elementto avoid duplicating. */ | |
1961 | for (subst_elem = define_subst_queue; | |
1962 | subst_elem; subst_elem = subst_elem->next) | |
1963 | { | |
1964 | if (has_subst_attribute (elem, subst_elem)) | |
1965 | { | |
1966 | remove_from_queue (elem, &queue); | |
1967 | return; | |
1968 | } | |
1969 | } | |
1970 | } | |
1971 | ||
1972 | /* This is a subroutine of mark_operands_used_in_match_dup. | |
1973 | This routine is marks all MATCH_OPERANDs inside PATTERN as occupied. */ | |
1974 | static void | |
1975 | mark_operands_from_match_dup (rtx pattern) | |
1976 | { | |
1977 | const char *fmt; | |
1978 | int i, j, len, opno; | |
1979 | ||
1980 | if (GET_CODE (pattern) == MATCH_OPERAND | |
1981 | || GET_CODE (pattern) == MATCH_OPERATOR | |
1982 | || GET_CODE (pattern) == MATCH_PARALLEL) | |
1983 | { | |
1984 | opno = XINT (pattern, 0); | |
1985 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
1986 | used_operands_numbers [opno] = 1; | |
1987 | } | |
1988 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
1989 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
1990 | for (i = 0; i < len; i++) | |
1991 | { | |
1992 | switch (fmt[i]) | |
1993 | { | |
1994 | case 'e': case 'u': | |
1995 | mark_operands_from_match_dup (XEXP (pattern, i)); | |
1996 | break; | |
1997 | case 'E': | |
1998 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1999 | mark_operands_from_match_dup (XVECEXP (pattern, i, j)); | |
2000 | break; | |
2001 | } | |
2002 | } | |
2003 | } | |
2004 | ||
a7ba15ca | 2005 | /* This is a subroutine of adjust_operands_numbers. |
477c104e MK |
2006 | It goes through all expressions in PATTERN and when MATCH_DUP is |
2007 | met, all MATCH_OPERANDs inside it is marked as occupied. The | |
2008 | process of marking is done by routin mark_operands_from_match_dup. */ | |
2009 | static void | |
2010 | mark_operands_used_in_match_dup (rtx pattern) | |
2011 | { | |
2012 | const char *fmt; | |
2013 | int i, j, len, opno; | |
2014 | ||
2015 | if (GET_CODE (pattern) == MATCH_DUP) | |
2016 | { | |
2017 | opno = XINT (pattern, 0); | |
2018 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
2019 | mark_operands_from_match_dup (operand_data[opno]); | |
2020 | return; | |
2021 | } | |
2022 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
2023 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
2024 | for (i = 0; i < len; i++) | |
2025 | { | |
2026 | switch (fmt[i]) | |
2027 | { | |
2028 | case 'e': case 'u': | |
2029 | mark_operands_used_in_match_dup (XEXP (pattern, i)); | |
2030 | break; | |
2031 | case 'E': | |
2032 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
2033 | mark_operands_used_in_match_dup (XVECEXP (pattern, i, j)); | |
2034 | break; | |
2035 | } | |
2036 | } | |
2037 | } | |
2038 | ||
2039 | /* This is subroutine of renumerate_operands_in_pattern. | |
2040 | It finds first not-occupied operand-index. */ | |
2041 | static int | |
2042 | find_first_unused_number_of_operand () | |
2043 | { | |
2044 | int i; | |
2045 | for (i = 0; i < MAX_OPERANDS; i++) | |
2046 | if (!used_operands_numbers[i]) | |
2047 | return i; | |
2048 | return MAX_OPERANDS; | |
2049 | } | |
2050 | ||
a7ba15ca AK |
2051 | /* This is subroutine of adjust_operands_numbers. |
2052 | It visits all expressions in PATTERN and assigns not-occupied | |
2053 | operand indexes to MATCH_OPERANDs and MATCH_OPERATORs of this | |
2054 | PATTERN. */ | |
477c104e MK |
2055 | static void |
2056 | renumerate_operands_in_pattern (rtx pattern) | |
2057 | { | |
2058 | const char *fmt; | |
2059 | enum rtx_code code; | |
2060 | int i, j, len, new_opno; | |
2061 | code = GET_CODE (pattern); | |
2062 | ||
2063 | if (code == MATCH_OPERAND | |
2064 | || code == MATCH_OPERATOR) | |
2065 | { | |
2066 | new_opno = find_first_unused_number_of_operand (); | |
2067 | gcc_assert (new_opno >= 0 && new_opno < MAX_OPERANDS); | |
2068 | XINT (pattern, 0) = new_opno; | |
2069 | used_operands_numbers [new_opno] = 1; | |
2070 | } | |
2071 | ||
2072 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
2073 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
2074 | for (i = 0; i < len; i++) | |
2075 | { | |
2076 | switch (fmt[i]) | |
2077 | { | |
2078 | case 'e': case 'u': | |
2079 | renumerate_operands_in_pattern (XEXP (pattern, i)); | |
2080 | break; | |
2081 | case 'E': | |
2082 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
2083 | renumerate_operands_in_pattern (XVECEXP (pattern, i, j)); | |
2084 | break; | |
2085 | } | |
2086 | } | |
2087 | } | |
2088 | ||
a7ba15ca AK |
2089 | /* If output pattern of define_subst contains MATCH_DUP, then this |
2090 | expression would be replaced with the pattern, matched with | |
2091 | MATCH_OPERAND from input pattern. This pattern could contain any | |
2092 | number of MATCH_OPERANDs, MATCH_OPERATORs etc., so it's possible | |
2093 | that a MATCH_OPERAND from output_pattern (if any) would have the | |
2094 | same number, as MATCH_OPERAND from copied pattern. To avoid such | |
2095 | indexes overlapping, we assign new indexes to MATCH_OPERANDs, | |
2096 | laying in the output pattern outside of MATCH_DUPs. */ | |
2097 | static rtx | |
2098 | adjust_operands_numbers (rtx pattern) | |
2099 | { | |
2100 | mark_operands_used_in_match_dup (pattern); | |
2101 | ||
2102 | renumerate_operands_in_pattern (pattern); | |
2103 | ||
2104 | return pattern; | |
2105 | } | |
477c104e MK |
2106 | |
2107 | /* Generate RTL expression | |
2108 | (match_dup OPNO) | |
2109 | */ | |
2110 | static rtx | |
2111 | generate_match_dup (int opno) | |
2112 | { | |
2113 | rtx return_rtx = rtx_alloc (MATCH_DUP); | |
2114 | PUT_CODE (return_rtx, MATCH_DUP); | |
2115 | XINT (return_rtx, 0) = opno; | |
2116 | return return_rtx; | |
2117 | } | |
2118 | ||
2119 | /* This routine checks all match_operands in PATTERN and if some of | |
2120 | have the same index, it replaces all of them except the first one to | |
2121 | match_dup. | |
2122 | Usually, match_operands with the same indexes are forbidden, but | |
2123 | after define_subst copy an RTL-expression from original template, | |
2124 | indexes of existed and just-copied match_operands could coincide. | |
2125 | To fix it, we replace one of them with match_dup. */ | |
2126 | static rtx | |
2127 | replace_duplicating_operands_in_pattern (rtx pattern) | |
2128 | { | |
2129 | const char *fmt; | |
2130 | int i, j, len, opno; | |
2131 | rtx mdup; | |
2132 | ||
2133 | if (GET_CODE (pattern) == MATCH_OPERAND) | |
2134 | { | |
2135 | opno = XINT (pattern, 0); | |
2136 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
2137 | if (match_operand_entries_in_pattern[opno] == NULL) | |
2138 | { | |
2139 | match_operand_entries_in_pattern[opno] = pattern; | |
2140 | return NULL; | |
2141 | } | |
2142 | else | |
2143 | { | |
2144 | /* Compare predicates before replacing with match_dup. */ | |
2145 | if (strcmp (XSTR (pattern, 1), | |
2146 | XSTR (match_operand_entries_in_pattern[opno], 1))) | |
2147 | { | |
2148 | error ("duplicated match_operands with different predicates were" | |
2149 | " found."); | |
2150 | return NULL; | |
2151 | } | |
2152 | return generate_match_dup (opno); | |
2153 | } | |
2154 | } | |
2155 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
2156 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
2157 | for (i = 0; i < len; i++) | |
2158 | { | |
2159 | switch (fmt[i]) | |
2160 | { | |
2161 | case 'e': case 'u': | |
2162 | mdup = replace_duplicating_operands_in_pattern (XEXP (pattern, i)); | |
2163 | if (mdup) | |
2164 | XEXP (pattern, i) = mdup; | |
2165 | break; | |
2166 | case 'E': | |
2167 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
2168 | { | |
2169 | mdup = | |
2170 | replace_duplicating_operands_in_pattern (XVECEXP | |
2171 | (pattern, i, j)); | |
2172 | if (mdup) | |
2173 | XVECEXP (pattern, i, j) = mdup; | |
2174 | } | |
2175 | break; | |
2176 | } | |
2177 | } | |
2178 | return NULL; | |
2179 | } | |
2180 | ||
2181 | /* The routine modifies given input PATTERN of define_subst, replacing | |
2182 | MATCH_DUP and MATCH_OP_DUP with operands from define_insn original | |
2183 | pattern, whose operands are stored in OPERAND_DATA array. | |
2184 | It also duplicates constraints in operands - constraints from | |
2185 | define_insn operands are duplicated N_SUBST_ALT times, constraints | |
2186 | from define_subst operands are duplicated N_ALT times. | |
2187 | After the duplication, returned output rtl-pattern contains every | |
2188 | combination of input constraints Vs constraints from define_subst | |
2189 | output. */ | |
2190 | static rtx | |
2191 | subst_dup (rtx pattern, int n_alt, int n_subst_alt) | |
2192 | { | |
2193 | const char *fmt; | |
2194 | enum rtx_code code; | |
2195 | int i, j, len, opno; | |
2196 | ||
2197 | code = GET_CODE (pattern); | |
2198 | switch (code) | |
2199 | { | |
2200 | case MATCH_DUP: | |
2201 | case MATCH_OP_DUP: | |
2202 | opno = XINT (pattern, 0); | |
2203 | ||
2204 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
2205 | ||
2206 | if (operand_data[opno]) | |
2207 | { | |
2208 | pattern = copy_rtx (operand_data[opno]); | |
2209 | ||
2210 | /* Duplicate constraints. */ | |
2211 | pattern = alter_constraints (pattern, n_subst_alt, | |
2212 | duplicate_alternatives); | |
2213 | } | |
2214 | break; | |
2215 | ||
2216 | default: | |
2217 | break; | |
2218 | } | |
2219 | ||
2220 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
2221 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
2222 | for (i = 0; i < len; i++) | |
2223 | { | |
2224 | switch (fmt[i]) | |
2225 | { | |
2226 | case 'e': case 'u': | |
2227 | if (code != MATCH_DUP && code != MATCH_OP_DUP) | |
2228 | XEXP (pattern, i) = subst_dup (XEXP (pattern, i), | |
2229 | n_alt, n_subst_alt); | |
2230 | break; | |
2231 | case 'V': | |
2232 | if (XVEC (pattern, i) == NULL) | |
2233 | break; | |
191816a3 | 2234 | /* FALLTHRU */ |
477c104e | 2235 | case 'E': |
c7b3b99f PCC |
2236 | if (code != MATCH_DUP && code != MATCH_OP_DUP) |
2237 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
477c104e MK |
2238 | XVECEXP (pattern, i, j) = subst_dup (XVECEXP (pattern, i, j), |
2239 | n_alt, n_subst_alt); | |
2240 | break; | |
2241 | ||
91914e56 RS |
2242 | case 'r': case 'p': case 'i': case 'w': |
2243 | case '0': case 's': case 'S': case 'T': | |
477c104e MK |
2244 | break; |
2245 | ||
2246 | default: | |
2247 | gcc_unreachable (); | |
2248 | } | |
2249 | } | |
2250 | return pattern; | |
2251 | } | |
2252 | ||
3262c1f5 RH |
2253 | /* If we have any DEFINE_COND_EXEC patterns, expand the DEFINE_INSN |
2254 | patterns appropriately. */ | |
2255 | ||
2256 | static void | |
3d7aafde | 2257 | process_define_cond_exec (void) |
3262c1f5 | 2258 | { |
99b1c316 | 2259 | class queue_elem *elem; |
3262c1f5 RH |
2260 | |
2261 | identify_predicable_attribute (); | |
bb933490 | 2262 | if (have_error) |
3262c1f5 RH |
2263 | return; |
2264 | ||
2265 | for (elem = define_cond_exec_queue; elem ; elem = elem->next) | |
2266 | process_one_cond_exec (elem); | |
2267 | } | |
477c104e MK |
2268 | |
2269 | /* If we have any DEFINE_SUBST patterns, expand DEFINE_INSN and | |
2270 | DEFINE_EXPAND patterns appropriately. */ | |
2271 | ||
2272 | static void | |
2273 | process_define_subst (void) | |
2274 | { | |
99b1c316 | 2275 | class queue_elem *elem, *elem_attr; |
477c104e MK |
2276 | |
2277 | /* Check if each define_subst has corresponding define_subst_attr. */ | |
2278 | for (elem = define_subst_queue; elem ; elem = elem->next) | |
2279 | { | |
2280 | for (elem_attr = define_subst_attr_queue; | |
2281 | elem_attr; | |
2282 | elem_attr = elem_attr->next) | |
2283 | if (strcmp (XSTR (elem->data, 0), XSTR (elem_attr->data, 1)) == 0) | |
2284 | goto found; | |
2285 | ||
cc472607 RS |
2286 | error_at (elem->loc, |
2287 | "%s: `define_subst' must have at least one " | |
2288 | "corresponding `define_subst_attr'", | |
2289 | XSTR (elem->data, 0)); | |
21c0a521 DM |
2290 | return; |
2291 | ||
477c104e MK |
2292 | found: |
2293 | continue; | |
2294 | } | |
2295 | ||
2296 | for (elem = define_insn_queue; elem ; elem = elem->next) | |
2297 | process_substs_on_one_elem (elem, define_insn_queue); | |
2298 | for (elem = other_queue; elem ; elem = elem->next) | |
2299 | { | |
2300 | if (GET_CODE (elem->data) != DEFINE_EXPAND) | |
2301 | continue; | |
2302 | process_substs_on_one_elem (elem, other_queue); | |
2303 | } | |
2304 | } | |
600ab3fc | 2305 | \f |
812b1403 DM |
2306 | /* A subclass of rtx_reader which reads .md files and calls process_rtx on |
2307 | the top-level elements. */ | |
04d8aa70 | 2308 | |
812b1403 DM |
2309 | class gen_reader : public rtx_reader |
2310 | { | |
2311 | public: | |
51b86113 | 2312 | gen_reader () : rtx_reader (false) {} |
26f77c4d | 2313 | void handle_unknown_directive (file_location, const char *) final override; |
812b1403 DM |
2314 | }; |
2315 | ||
2316 | void | |
2317 | gen_reader::handle_unknown_directive (file_location loc, const char *rtx_name) | |
04d8aa70 | 2318 | { |
6b8068d6 TS |
2319 | auto_vec<rtx, 32> subrtxs; |
2320 | if (!read_rtx (rtx_name, &subrtxs)) | |
2321 | return; | |
04d8aa70 | 2322 | |
6b8068d6 TS |
2323 | rtx x; |
2324 | unsigned int i; | |
2325 | FOR_EACH_VEC_ELT (subrtxs, i, x) | |
cc472607 | 2326 | process_rtx (x, loc); |
04d8aa70 AM |
2327 | } |
2328 | ||
64aad689 | 2329 | /* Add mnemonic STR with length LEN to the mnemonic hash table |
5764ee3c | 2330 | MNEMONIC_HTAB. A trailing zero end character is appended to STR |
64aad689 AK |
2331 | and a permanent heap copy of STR is created. */ |
2332 | ||
2333 | static void | |
c240b3e0 | 2334 | add_mnemonic_string (htab_t mnemonic_htab, const char *str, size_t len) |
64aad689 AK |
2335 | { |
2336 | char *new_str; | |
2337 | void **slot; | |
2338 | char *str_zero = (char*)alloca (len + 1); | |
2339 | ||
2340 | memcpy (str_zero, str, len); | |
2341 | str_zero[len] = '\0'; | |
2342 | ||
2343 | slot = htab_find_slot (mnemonic_htab, str_zero, INSERT); | |
2344 | ||
2345 | if (*slot) | |
2346 | return; | |
2347 | ||
2348 | /* Not found; create a permanent copy and add it to the hash table. */ | |
2349 | new_str = XNEWVAR (char, len + 1); | |
2350 | memcpy (new_str, str_zero, len + 1); | |
2351 | *slot = new_str; | |
2352 | } | |
2353 | ||
2354 | /* Scan INSN for mnemonic strings and add them to the mnemonic hash | |
2355 | table in MNEMONIC_HTAB. | |
2356 | ||
2357 | The mnemonics cannot be found if they are emitted using C code. | |
2358 | ||
2359 | If a mnemonic string contains ';' or a newline the string assumed | |
2360 | to consist of more than a single instruction. The attribute value | |
2361 | will then be set to the user defined default value. */ | |
2362 | ||
2363 | static void | |
2364 | gen_mnemonic_setattr (htab_t mnemonic_htab, rtx insn) | |
2365 | { | |
2366 | const char *template_code, *cp; | |
2367 | int i; | |
2368 | int vec_len; | |
2369 | rtx set_attr; | |
2370 | char *attr_name; | |
2371 | rtvec new_vec; | |
b78027d1 | 2372 | struct obstack *string_obstack = rtx_reader_ptr->get_string_obstack (); |
64aad689 AK |
2373 | |
2374 | template_code = XTMPL (insn, 3); | |
2375 | ||
2376 | /* Skip patterns which use C code to emit the template. */ | |
2377 | if (template_code[0] == '*') | |
2378 | return; | |
2379 | ||
2380 | if (template_code[0] == '@') | |
2381 | cp = &template_code[1]; | |
2382 | else | |
2383 | cp = &template_code[0]; | |
2384 | ||
2385 | for (i = 0; *cp; ) | |
2386 | { | |
2387 | const char *ep, *sp; | |
c240b3e0 | 2388 | size_t size = 0; |
64aad689 AK |
2389 | |
2390 | while (ISSPACE (*cp)) | |
2391 | cp++; | |
2392 | ||
2393 | for (ep = sp = cp; !IS_VSPACE (*ep) && *ep != '\0'; ++ep) | |
2394 | if (!ISSPACE (*ep)) | |
2395 | sp = ep + 1; | |
2396 | ||
2397 | if (i > 0) | |
b78027d1 | 2398 | obstack_1grow (string_obstack, ','); |
64aad689 AK |
2399 | |
2400 | while (cp < sp && ((*cp >= '0' && *cp <= '9') | |
2401 | || (*cp >= 'a' && *cp <= 'z'))) | |
2402 | ||
2403 | { | |
b78027d1 | 2404 | obstack_1grow (string_obstack, *cp); |
64aad689 AK |
2405 | cp++; |
2406 | size++; | |
2407 | } | |
2408 | ||
2409 | while (cp < sp) | |
2410 | { | |
2411 | if (*cp == ';' || (*cp == '\\' && cp[1] == 'n')) | |
2412 | { | |
2413 | /* Don't set a value if there are more than one | |
2414 | instruction in the string. */ | |
b78027d1 | 2415 | obstack_blank_fast (string_obstack, -size); |
64aad689 AK |
2416 | size = 0; |
2417 | ||
2418 | cp = sp; | |
2419 | break; | |
2420 | } | |
2421 | cp++; | |
2422 | } | |
2423 | if (size == 0) | |
b78027d1 | 2424 | obstack_1grow (string_obstack, '*'); |
64aad689 AK |
2425 | else |
2426 | add_mnemonic_string (mnemonic_htab, | |
b78027d1 | 2427 | (char *) obstack_next_free (string_obstack) - size, |
64aad689 AK |
2428 | size); |
2429 | i++; | |
2430 | } | |
2431 | ||
2432 | /* An insn definition might emit an empty string. */ | |
b78027d1 | 2433 | if (obstack_object_size (string_obstack) == 0) |
64aad689 AK |
2434 | return; |
2435 | ||
b78027d1 | 2436 | obstack_1grow (string_obstack, '\0'); |
64aad689 AK |
2437 | |
2438 | set_attr = rtx_alloc (SET_ATTR); | |
b78027d1 | 2439 | XSTR (set_attr, 1) = XOBFINISH (string_obstack, char *); |
64aad689 AK |
2440 | attr_name = XNEWVAR (char, strlen (MNEMONIC_ATTR_NAME) + 1); |
2441 | strcpy (attr_name, MNEMONIC_ATTR_NAME); | |
2442 | XSTR (set_attr, 0) = attr_name; | |
2443 | ||
2444 | if (!XVEC (insn, 4)) | |
2445 | vec_len = 0; | |
2446 | else | |
2447 | vec_len = XVECLEN (insn, 4); | |
2448 | ||
2449 | new_vec = rtvec_alloc (vec_len + 1); | |
2450 | for (i = 0; i < vec_len; i++) | |
2451 | RTVEC_ELT (new_vec, i) = XVECEXP (insn, 4, i); | |
2452 | RTVEC_ELT (new_vec, vec_len) = set_attr; | |
2453 | XVEC (insn, 4) = new_vec; | |
2454 | } | |
2455 | ||
2456 | /* This function is called for the elements in the mnemonic hashtable | |
2457 | and generates a comma separated list of the mnemonics. */ | |
2458 | ||
2459 | static int | |
2460 | mnemonic_htab_callback (void **slot, void *info ATTRIBUTE_UNUSED) | |
2461 | { | |
b78027d1 DM |
2462 | struct obstack *string_obstack = rtx_reader_ptr->get_string_obstack (); |
2463 | ||
2464 | obstack_grow (string_obstack, (char*) *slot, strlen ((char*) *slot)); | |
2465 | obstack_1grow (string_obstack, ','); | |
64aad689 AK |
2466 | return 1; |
2467 | } | |
2468 | ||
2469 | /* Generate (set_attr "mnemonic" "..") RTXs and append them to every | |
2470 | insn definition in case the back end requests it by defining the | |
2471 | mnemonic attribute. The values for the attribute will be extracted | |
2472 | from the output patterns of the insn definitions as far as | |
2473 | possible. */ | |
2474 | ||
2475 | static void | |
2476 | gen_mnemonic_attr (void) | |
2477 | { | |
99b1c316 | 2478 | class queue_elem *elem; |
64aad689 AK |
2479 | rtx mnemonic_attr = NULL; |
2480 | htab_t mnemonic_htab; | |
2481 | const char *str, *p; | |
2482 | int i; | |
b78027d1 | 2483 | struct obstack *string_obstack = rtx_reader_ptr->get_string_obstack (); |
64aad689 AK |
2484 | |
2485 | if (have_error) | |
2486 | return; | |
2487 | ||
2488 | /* Look for the DEFINE_ATTR for `mnemonic'. */ | |
2489 | for (elem = define_attr_queue; elem != *define_attr_tail; elem = elem->next) | |
2490 | if (GET_CODE (elem->data) == DEFINE_ATTR | |
2491 | && strcmp (XSTR (elem->data, 0), MNEMONIC_ATTR_NAME) == 0) | |
2492 | { | |
2493 | mnemonic_attr = elem->data; | |
2494 | break; | |
2495 | } | |
2496 | ||
2497 | /* A (define_attr "mnemonic" "...") indicates that the back-end | |
2498 | wants a mnemonic attribute to be generated. */ | |
2499 | if (!mnemonic_attr) | |
2500 | return; | |
2501 | ||
2502 | mnemonic_htab = htab_create_alloc (MNEMONIC_HTAB_SIZE, htab_hash_string, | |
2503 | htab_eq_string, 0, xcalloc, free); | |
2504 | ||
2505 | for (elem = define_insn_queue; elem; elem = elem->next) | |
2506 | { | |
2507 | rtx insn = elem->data; | |
2508 | bool found = false; | |
2509 | ||
2510 | /* Check if the insn definition already has | |
5db40447 | 2511 | (set_attr "mnemonic" ...) or (set (attr "mnemonic") ...). */ |
64aad689 AK |
2512 | if (XVEC (insn, 4)) |
2513 | for (i = 0; i < XVECLEN (insn, 4); i++) | |
5db40447 AK |
2514 | { |
2515 | rtx set_attr = XVECEXP (insn, 4, i); | |
2516 | ||
2517 | switch (GET_CODE (set_attr)) | |
2518 | { | |
2519 | case SET_ATTR: | |
2520 | case SET_ATTR_ALTERNATIVE: | |
2521 | if (strcmp (XSTR (set_attr, 0), MNEMONIC_ATTR_NAME) == 0) | |
2522 | found = true; | |
2523 | break; | |
2524 | case SET: | |
2525 | if (GET_CODE (SET_DEST (set_attr)) == ATTR | |
2526 | && strcmp (XSTR (SET_DEST (set_attr), 0), | |
2527 | MNEMONIC_ATTR_NAME) == 0) | |
2528 | found = true; | |
2529 | break; | |
2530 | default: | |
2531 | break; | |
2532 | } | |
2533 | } | |
64aad689 AK |
2534 | |
2535 | if (!found) | |
2536 | gen_mnemonic_setattr (mnemonic_htab, insn); | |
2537 | } | |
2538 | ||
2539 | /* Add the user defined values to the hash table. */ | |
2540 | str = XSTR (mnemonic_attr, 1); | |
2541 | while ((p = scan_comma_elt (&str)) != NULL) | |
2542 | add_mnemonic_string (mnemonic_htab, p, str - p); | |
2543 | ||
2544 | htab_traverse (mnemonic_htab, mnemonic_htab_callback, NULL); | |
2545 | ||
2546 | /* Replace the last ',' with the zero end character. */ | |
b78027d1 DM |
2547 | *((char *) obstack_next_free (string_obstack) - 1) = '\0'; |
2548 | XSTR (mnemonic_attr, 1) = XOBFINISH (string_obstack, char *); | |
64aad689 AK |
2549 | } |
2550 | ||
477c104e MK |
2551 | /* Check if there are DEFINE_ATTRs with the same name. */ |
2552 | static void | |
2553 | check_define_attr_duplicates () | |
2554 | { | |
99b1c316 | 2555 | class queue_elem *elem; |
477c104e MK |
2556 | htab_t attr_htab; |
2557 | char * attr_name; | |
2558 | void **slot; | |
2559 | ||
2560 | attr_htab = htab_create (500, htab_hash_string, htab_eq_string, NULL); | |
2561 | ||
2562 | for (elem = define_attr_queue; elem; elem = elem->next) | |
2563 | { | |
2564 | attr_name = xstrdup (XSTR (elem->data, 0)); | |
2565 | ||
2566 | slot = htab_find_slot (attr_htab, attr_name, INSERT); | |
2567 | ||
2568 | /* Duplicate. */ | |
2569 | if (*slot) | |
2570 | { | |
cc472607 | 2571 | error_at (elem->loc, "redefinition of attribute '%s'", attr_name); |
477c104e MK |
2572 | htab_delete (attr_htab); |
2573 | return; | |
2574 | } | |
2575 | ||
2576 | *slot = attr_name; | |
2577 | } | |
2578 | ||
2579 | htab_delete (attr_htab); | |
2580 | } | |
2581 | ||
04d8aa70 AM |
2582 | /* The entry point for initializing the reader. */ |
2583 | ||
812b1403 | 2584 | rtx_reader * |
66b0fe8f | 2585 | init_rtx_reader_args_cb (int argc, const char **argv, |
600ab3fc | 2586 | bool (*parse_opt) (const char *)) |
04d8aa70 | 2587 | { |
1c7352cd ZW |
2588 | /* Prepare to read input. */ |
2589 | condition_table = htab_create (500, hash_c_test, cmp_c_test, NULL); | |
e543e219 | 2590 | init_predicate_table (); |
3916d6d8 | 2591 | obstack_init (rtl_obstack); |
e714561a SB |
2592 | |
2593 | /* Start at 1, to make 0 available for CODE_FOR_nothing. */ | |
72a35f93 RS |
2594 | insn_sequence_num = 1; |
2595 | ||
2596 | /* These sequences are not used as indices, so can start at 1 also. */ | |
2597 | split_sequence_num = 1; | |
2598 | peephole2_sequence_num = 1; | |
1c7352cd | 2599 | |
812b1403 DM |
2600 | gen_reader *reader = new gen_reader (); |
2601 | reader->read_md_files (argc, argv, parse_opt); | |
3262c1f5 | 2602 | |
477c104e MK |
2603 | if (define_attr_queue != NULL) |
2604 | check_define_attr_duplicates (); | |
2605 | ||
3262c1f5 RH |
2606 | /* Process define_cond_exec patterns. */ |
2607 | if (define_cond_exec_queue != NULL) | |
2608 | process_define_cond_exec (); | |
2609 | ||
477c104e MK |
2610 | /* Process define_subst patterns. */ |
2611 | if (define_subst_queue != NULL) | |
2612 | process_define_subst (); | |
2613 | ||
64aad689 AK |
2614 | if (define_attr_queue != NULL) |
2615 | gen_mnemonic_attr (); | |
2616 | ||
812b1403 DM |
2617 | if (have_error) |
2618 | { | |
2619 | delete reader; | |
2620 | return NULL; | |
2621 | } | |
2622 | ||
2623 | return reader; | |
3262c1f5 RH |
2624 | } |
2625 | ||
f9942f4e ZW |
2626 | /* Programs that don't have their own options can use this entry point |
2627 | instead. */ | |
812b1403 | 2628 | rtx_reader * |
66b0fe8f | 2629 | init_rtx_reader_args (int argc, const char **argv) |
f9942f4e | 2630 | { |
600ab3fc | 2631 | return init_rtx_reader_args_cb (argc, argv, 0); |
f9942f4e ZW |
2632 | } |
2633 | \f | |
5d2d3e43 RS |
2634 | /* Try to read a single rtx from the file. Return true on success, |
2635 | describing it in *INFO. */ | |
3262c1f5 | 2636 | |
5d2d3e43 RS |
2637 | bool |
2638 | read_md_rtx (md_rtx_info *info) | |
3262c1f5 | 2639 | { |
72a35f93 RS |
2640 | int truth, *counter; |
2641 | rtx def; | |
3262c1f5 | 2642 | |
2199e5fa ZW |
2643 | /* Discard insn patterns which we know can never match (because |
2644 | their C test is provably always false). If insn_elision is | |
2645 | false, our caller needs to see all the patterns. Note that the | |
2646 | elided patterns are never counted by the sequence numbering; it | |
1a84c183 | 2647 | is the caller's responsibility, when insn_elision is false, not |
2199e5fa | 2648 | to use elided pattern numbers for anything. */ |
72a35f93 RS |
2649 | do |
2650 | { | |
99b1c316 | 2651 | class queue_elem **queue, *elem; |
72a35f93 RS |
2652 | |
2653 | /* Read all patterns from a given queue before moving on to the next. */ | |
2654 | if (define_attr_queue != NULL) | |
2655 | queue = &define_attr_queue; | |
2656 | else if (define_pred_queue != NULL) | |
2657 | queue = &define_pred_queue; | |
2658 | else if (define_insn_queue != NULL) | |
2659 | queue = &define_insn_queue; | |
2660 | else if (other_queue != NULL) | |
2661 | queue = &other_queue; | |
2662 | else | |
2663 | return false; | |
2664 | ||
2665 | elem = *queue; | |
2666 | *queue = elem->next; | |
2667 | def = elem->data; | |
2668 | info->def = def; | |
2669 | info->loc = elem->loc; | |
2670 | free (elem); | |
2671 | ||
2672 | truth = maybe_eval_c_test (get_c_test (def)); | |
2673 | } | |
2674 | while (truth == 0 && insn_elision); | |
2675 | ||
2676 | /* Perform code-specific processing and pick the appropriate sequence | |
2677 | number counter. */ | |
2678 | switch (GET_CODE (def)) | |
c88c0d42 | 2679 | { |
3262c1f5 RH |
2680 | case DEFINE_INSN: |
2681 | case DEFINE_EXPAND: | |
72a35f93 | 2682 | /* insn_sequence_num is used here so the name table will match caller's |
0458fe77 | 2683 | idea of insn numbering, whether or not elision is active. */ |
72a35f93 RS |
2684 | record_insn_name (insn_sequence_num, XSTR (def, 0)); |
2685 | ||
2686 | /* Fall through. */ | |
2687 | case DEFINE_PEEPHOLE: | |
2688 | counter = &insn_sequence_num; | |
2199e5fa ZW |
2689 | break; |
2690 | ||
3262c1f5 | 2691 | case DEFINE_SPLIT: |
72a35f93 RS |
2692 | counter = &split_sequence_num; |
2693 | break; | |
2694 | ||
3262c1f5 | 2695 | case DEFINE_PEEPHOLE2: |
72a35f93 | 2696 | counter = &peephole2_sequence_num; |
3262c1f5 RH |
2697 | break; |
2698 | ||
2699 | default: | |
72a35f93 | 2700 | counter = NULL; |
3262c1f5 | 2701 | break; |
c88c0d42 CP |
2702 | } |
2703 | ||
72a35f93 RS |
2704 | if (counter) |
2705 | { | |
2706 | info->index = *counter; | |
2707 | if (truth != 0) | |
2708 | *counter += 1; | |
2709 | } | |
2710 | else | |
2711 | info->index = -1; | |
2712 | ||
58d745ec RS |
2713 | if (!rtx_locs) |
2714 | rtx_locs = new hash_map <rtx, file_location>; | |
2715 | rtx_locs->put (info->def, info->loc); | |
2716 | ||
5d2d3e43 | 2717 | return true; |
c88c0d42 | 2718 | } |
9a5834ae | 2719 | |
58d745ec RS |
2720 | /* Return the file location of DEFINE_* rtx X, which was previously |
2721 | returned by read_md_rtx. */ | |
2722 | file_location | |
2723 | get_file_location (rtx x) | |
2724 | { | |
2725 | gcc_assert (rtx_locs); | |
2726 | file_location *entry = rtx_locs->get (x); | |
2727 | gcc_assert (entry); | |
2728 | return *entry; | |
2729 | } | |
2730 | ||
ba0ee63d RS |
2731 | /* Return the number of possible INSN_CODEs. Only meaningful once the |
2732 | whole file has been processed. */ | |
2733 | unsigned int | |
2734 | get_num_insn_codes () | |
2735 | { | |
72a35f93 | 2736 | return insn_sequence_num; |
ba0ee63d RS |
2737 | } |
2738 | ||
d1427a17 RS |
2739 | /* Return the C test that says whether definition rtx DEF can be used, |
2740 | or "" if it can be used unconditionally. */ | |
2741 | ||
2742 | const char * | |
2743 | get_c_test (rtx x) | |
2744 | { | |
2745 | switch (GET_CODE (x)) | |
2746 | { | |
2747 | case DEFINE_INSN: | |
2748 | case DEFINE_EXPAND: | |
2749 | case DEFINE_SUBST: | |
2750 | return XSTR (x, 2); | |
2751 | ||
2752 | case DEFINE_SPLIT: | |
2753 | case DEFINE_PEEPHOLE: | |
2754 | case DEFINE_PEEPHOLE2: | |
2755 | return XSTR (x, 1); | |
2756 | ||
2757 | default: | |
2758 | return ""; | |
2759 | } | |
2760 | } | |
2761 | ||
2199e5fa ZW |
2762 | /* Helper functions for insn elision. */ |
2763 | ||
2764 | /* Compute a hash function of a c_test structure, which is keyed | |
2765 | by its ->expr field. */ | |
2766 | hashval_t | |
3d7aafde | 2767 | hash_c_test (const void *x) |
2199e5fa ZW |
2768 | { |
2769 | const struct c_test *a = (const struct c_test *) x; | |
2770 | const unsigned char *base, *s = (const unsigned char *) a->expr; | |
2771 | hashval_t hash; | |
2772 | unsigned char c; | |
2773 | unsigned int len; | |
2774 | ||
2775 | base = s; | |
2776 | hash = 0; | |
2777 | ||
2778 | while ((c = *s++) != '\0') | |
2779 | { | |
2780 | hash += c + (c << 17); | |
2781 | hash ^= hash >> 2; | |
2782 | } | |
2783 | ||
2784 | len = s - base; | |
2785 | hash += len + (len << 17); | |
2786 | hash ^= hash >> 2; | |
2787 | ||
2788 | return hash; | |
2789 | } | |
2790 | ||
2791 | /* Compare two c_test expression structures. */ | |
2792 | int | |
3d7aafde | 2793 | cmp_c_test (const void *x, const void *y) |
2199e5fa ZW |
2794 | { |
2795 | const struct c_test *a = (const struct c_test *) x; | |
2796 | const struct c_test *b = (const struct c_test *) y; | |
2797 | ||
2798 | return !strcmp (a->expr, b->expr); | |
2799 | } | |
2800 | ||
2801 | /* Given a string representing a C test expression, look it up in the | |
2802 | condition_table and report whether or not its value is known | |
2803 | at compile time. Returns a tristate: 1 for known true, 0 for | |
2804 | known false, -1 for unknown. */ | |
2805 | int | |
3d7aafde | 2806 | maybe_eval_c_test (const char *expr) |
2199e5fa ZW |
2807 | { |
2808 | const struct c_test *test; | |
2809 | struct c_test dummy; | |
2810 | ||
52831d13 | 2811 | if (expr[0] == 0) |
2199e5fa ZW |
2812 | return 1; |
2813 | ||
2199e5fa | 2814 | dummy.expr = expr; |
5d038c4c | 2815 | test = (const struct c_test *)htab_find (condition_table, &dummy); |
1c7352cd ZW |
2816 | if (!test) |
2817 | return -1; | |
2199e5fa ZW |
2818 | return test->value; |
2819 | } | |
2820 | ||
1c7352cd ZW |
2821 | /* Record the C test expression EXPR in the condition_table, with |
2822 | value VAL. Duplicates clobber previous entries. */ | |
2823 | ||
2824 | void | |
2825 | add_c_test (const char *expr, int value) | |
2826 | { | |
2827 | struct c_test *test; | |
2828 | ||
2829 | if (expr[0] == 0) | |
2830 | return; | |
2831 | ||
2832 | test = XNEW (struct c_test); | |
2833 | test->expr = expr; | |
2834 | test->value = value; | |
2835 | ||
2836 | *(htab_find_slot (condition_table, test, INSERT)) = test; | |
2837 | } | |
2838 | ||
2839 | /* For every C test, call CALLBACK with two arguments: a pointer to | |
2840 | the condition structure and INFO. Stops when CALLBACK returns zero. */ | |
2841 | void | |
2842 | traverse_c_tests (htab_trav callback, void *info) | |
2843 | { | |
2844 | if (condition_table) | |
2845 | htab_traverse (condition_table, callback, info); | |
2846 | } | |
2847 | ||
e543e219 | 2848 | /* Helper functions for define_predicate and define_special_predicate |
e53b6e56 | 2849 | processing. Shared between genrecog.cc and genpreds.cc. */ |
e543e219 ZW |
2850 | |
2851 | static htab_t predicate_table; | |
2852 | struct pred_data *first_predicate; | |
2853 | static struct pred_data **last_predicate = &first_predicate; | |
2854 | ||
2855 | static hashval_t | |
2856 | hash_struct_pred_data (const void *ptr) | |
2857 | { | |
2858 | return htab_hash_string (((const struct pred_data *)ptr)->name); | |
2859 | } | |
2860 | ||
2861 | static int | |
2862 | eq_struct_pred_data (const void *a, const void *b) | |
2863 | { | |
2864 | return !strcmp (((const struct pred_data *)a)->name, | |
2865 | ((const struct pred_data *)b)->name); | |
2866 | } | |
2867 | ||
2868 | struct pred_data * | |
2869 | lookup_predicate (const char *name) | |
2870 | { | |
2871 | struct pred_data key; | |
2872 | key.name = name; | |
cceb1885 | 2873 | return (struct pred_data *) htab_find (predicate_table, &key); |
e543e219 ZW |
2874 | } |
2875 | ||
e663da80 RS |
2876 | /* Record that predicate PRED can accept CODE. */ |
2877 | ||
2878 | void | |
2879 | add_predicate_code (struct pred_data *pred, enum rtx_code code) | |
2880 | { | |
2881 | if (!pred->codes[code]) | |
2882 | { | |
2883 | pred->num_codes++; | |
2884 | pred->codes[code] = true; | |
2885 | ||
2886 | if (GET_RTX_CLASS (code) != RTX_CONST_OBJ) | |
2887 | pred->allows_non_const = true; | |
2888 | ||
2889 | if (code != REG | |
2890 | && code != SUBREG | |
2891 | && code != MEM | |
2892 | && code != CONCAT | |
2893 | && code != PARALLEL | |
a8fd4225 | 2894 | && code != STRICT_LOW_PART |
4822d9cb | 2895 | && code != ZERO_EXTRACT |
a8fd4225 | 2896 | && code != SCRATCH) |
e663da80 RS |
2897 | pred->allows_non_lvalue = true; |
2898 | ||
2899 | if (pred->num_codes == 1) | |
2900 | pred->singleton = code; | |
2901 | else if (pred->num_codes == 2) | |
2902 | pred->singleton = UNKNOWN; | |
2903 | } | |
2904 | } | |
2905 | ||
e543e219 ZW |
2906 | void |
2907 | add_predicate (struct pred_data *pred) | |
2908 | { | |
2909 | void **slot = htab_find_slot (predicate_table, pred, INSERT); | |
2910 | if (*slot) | |
2911 | { | |
2912 | error ("duplicate predicate definition for '%s'", pred->name); | |
2913 | return; | |
2914 | } | |
2915 | *slot = pred; | |
2916 | *last_predicate = pred; | |
2917 | last_predicate = &pred->next; | |
2918 | } | |
2919 | ||
2920 | /* This array gives the initial content of the predicate table. It | |
e53b6e56 | 2921 | has entries for all predicates defined in recog.cc. */ |
e543e219 | 2922 | |
ebce9df7 | 2923 | struct std_pred_table |
e543e219 ZW |
2924 | { |
2925 | const char *name; | |
ebce9df7 | 2926 | bool special; |
e663da80 | 2927 | bool allows_const_p; |
e543e219 ZW |
2928 | RTX_CODE codes[NUM_RTX_CODE]; |
2929 | }; | |
2930 | ||
ebce9df7 | 2931 | static const struct std_pred_table std_preds[] = { |
e663da80 | 2932 | {"general_operand", false, true, {SUBREG, REG, MEM}}, |
0060d7d7 RS |
2933 | {"address_operand", true, true, {SUBREG, REG, MEM, PLUS, MINUS, MULT, |
2934 | ZERO_EXTEND, SIGN_EXTEND, AND}}, | |
e663da80 RS |
2935 | {"register_operand", false, false, {SUBREG, REG}}, |
2936 | {"pmode_register_operand", true, false, {SUBREG, REG}}, | |
2937 | {"scratch_operand", false, false, {SCRATCH, REG}}, | |
81f40b79 | 2938 | {"immediate_operand", false, true, {UNKNOWN}}, |
e663da80 | 2939 | {"const_int_operand", false, false, {CONST_INT}}, |
807e902e KZ |
2940 | #if TARGET_SUPPORTS_WIDE_INT |
2941 | {"const_scalar_int_operand", false, false, {CONST_INT, CONST_WIDE_INT}}, | |
2942 | {"const_double_operand", false, false, {CONST_DOUBLE}}, | |
2943 | #else | |
e663da80 | 2944 | {"const_double_operand", false, false, {CONST_INT, CONST_DOUBLE}}, |
807e902e | 2945 | #endif |
e663da80 RS |
2946 | {"nonimmediate_operand", false, false, {SUBREG, REG, MEM}}, |
2947 | {"nonmemory_operand", false, true, {SUBREG, REG}}, | |
2948 | {"push_operand", false, false, {MEM}}, | |
2949 | {"pop_operand", false, false, {MEM}}, | |
2950 | {"memory_operand", false, false, {SUBREG, MEM}}, | |
2951 | {"indirect_operand", false, false, {SUBREG, MEM}}, | |
c6963675 PB |
2952 | {"ordered_comparison_operator", false, false, {EQ, NE, |
2953 | LE, LT, GE, GT, | |
2954 | LEU, LTU, GEU, GTU}}, | |
e663da80 RS |
2955 | {"comparison_operator", false, false, {EQ, NE, |
2956 | LE, LT, GE, GT, | |
2957 | LEU, LTU, GEU, GTU, | |
2958 | UNORDERED, ORDERED, | |
2959 | UNEQ, UNGE, UNGT, | |
2960 | UNLE, UNLT, LTGT}} | |
e543e219 | 2961 | }; |
ebce9df7 | 2962 | #define NUM_KNOWN_STD_PREDS ARRAY_SIZE (std_preds) |
e543e219 ZW |
2963 | |
2964 | /* Initialize the table of predicate definitions, starting with | |
c2acaf06 | 2965 | the information we have on generic predicates. */ |
e543e219 ZW |
2966 | |
2967 | static void | |
2968 | init_predicate_table (void) | |
2969 | { | |
2970 | size_t i, j; | |
2971 | struct pred_data *pred; | |
2972 | ||
2973 | predicate_table = htab_create_alloc (37, hash_struct_pred_data, | |
2974 | eq_struct_pred_data, 0, | |
2975 | xcalloc, free); | |
2976 | ||
ebce9df7 | 2977 | for (i = 0; i < NUM_KNOWN_STD_PREDS; i++) |
e543e219 | 2978 | { |
cceb1885 | 2979 | pred = XCNEW (struct pred_data); |
ebce9df7 PB |
2980 | pred->name = std_preds[i].name; |
2981 | pred->special = std_preds[i].special; | |
e543e219 | 2982 | |
ebce9df7 | 2983 | for (j = 0; std_preds[i].codes[j] != 0; j++) |
e663da80 RS |
2984 | add_predicate_code (pred, std_preds[i].codes[j]); |
2985 | ||
2986 | if (std_preds[i].allows_const_p) | |
2987 | for (j = 0; j < NUM_RTX_CODE; j++) | |
2988 | if (GET_RTX_CLASS (j) == RTX_CONST_OBJ) | |
bbbbb16a | 2989 | add_predicate_code (pred, (enum rtx_code) j); |
b8698a0f | 2990 | |
e543e219 ZW |
2991 | add_predicate (pred); |
2992 | } | |
e543e219 | 2993 | } |
0458fe77 | 2994 | \f |
e53b6e56 | 2995 | /* These functions allow linkage with print-rtl.cc. Also, some generators |
0458fe77 ZW |
2996 | like to annotate their output with insn names. */ |
2997 | ||
2998 | /* Holds an array of names indexed by insn_code_number. */ | |
2999 | static char **insn_name_ptr = 0; | |
3000 | static int insn_name_ptr_size = 0; | |
3001 | ||
3002 | const char * | |
3003 | get_insn_name (int code) | |
3004 | { | |
3005 | if (code < insn_name_ptr_size) | |
3006 | return insn_name_ptr[code]; | |
3007 | else | |
3008 | return NULL; | |
3009 | } | |
3010 | ||
3011 | static void | |
3012 | record_insn_name (int code, const char *name) | |
3013 | { | |
3014 | static const char *last_real_name = "insn"; | |
3015 | static int last_real_code = 0; | |
8ad97cfc | 3016 | char *new_name; |
0458fe77 ZW |
3017 | |
3018 | if (insn_name_ptr_size <= code) | |
3019 | { | |
3020 | int new_size; | |
3021 | new_size = (insn_name_ptr_size ? insn_name_ptr_size * 2 : 512); | |
7cbb2a85 | 3022 | insn_name_ptr = XRESIZEVEC (char *, insn_name_ptr, new_size); |
0458fe77 | 3023 | memset (insn_name_ptr + insn_name_ptr_size, 0, |
c3284718 | 3024 | sizeof (char *) * (new_size - insn_name_ptr_size)); |
0458fe77 ZW |
3025 | insn_name_ptr_size = new_size; |
3026 | } | |
3027 | ||
3028 | if (!name || name[0] == '\0') | |
3029 | { | |
8ad97cfc KG |
3030 | new_name = XNEWVAR (char, strlen (last_real_name) + 10); |
3031 | sprintf (new_name, "%s+%d", last_real_name, code - last_real_code); | |
0458fe77 ZW |
3032 | } |
3033 | else | |
3034 | { | |
8ad97cfc | 3035 | last_real_name = new_name = xstrdup (name); |
0458fe77 ZW |
3036 | last_real_code = code; |
3037 | } | |
3038 | ||
8ad97cfc | 3039 | insn_name_ptr[code] = new_name; |
0458fe77 | 3040 | } |
e792559a RS |
3041 | \f |
3042 | /* Make STATS describe the operands that appear in rtx X. */ | |
3043 | ||
3044 | static void | |
3045 | get_pattern_stats_1 (struct pattern_stats *stats, rtx x) | |
3046 | { | |
3047 | RTX_CODE code; | |
3048 | int i; | |
3049 | int len; | |
3050 | const char *fmt; | |
3051 | ||
3052 | if (x == NULL_RTX) | |
3053 | return; | |
3054 | ||
3055 | code = GET_CODE (x); | |
3056 | switch (code) | |
3057 | { | |
3058 | case MATCH_OPERAND: | |
3059 | case MATCH_OPERATOR: | |
3060 | case MATCH_PARALLEL: | |
3061 | stats->max_opno = MAX (stats->max_opno, XINT (x, 0)); | |
3062 | break; | |
3063 | ||
3064 | case MATCH_DUP: | |
3065 | case MATCH_OP_DUP: | |
3066 | case MATCH_PAR_DUP: | |
3067 | stats->num_dups++; | |
3068 | stats->max_dup_opno = MAX (stats->max_dup_opno, XINT (x, 0)); | |
3069 | break; | |
3070 | ||
3071 | case MATCH_SCRATCH: | |
d5a216fa JJ |
3072 | if (stats->min_scratch_opno == -1) |
3073 | stats->min_scratch_opno = XINT (x, 0); | |
3074 | else | |
3075 | stats->min_scratch_opno = MIN (stats->min_scratch_opno, XINT (x, 0)); | |
e792559a RS |
3076 | stats->max_scratch_opno = MAX (stats->max_scratch_opno, XINT (x, 0)); |
3077 | break; | |
3078 | ||
3079 | default: | |
3080 | break; | |
3081 | } | |
3082 | ||
3083 | fmt = GET_RTX_FORMAT (code); | |
3084 | len = GET_RTX_LENGTH (code); | |
3085 | for (i = 0; i < len; i++) | |
3086 | { | |
3087 | if (fmt[i] == 'e' || fmt[i] == 'u') | |
3088 | get_pattern_stats_1 (stats, XEXP (x, i)); | |
3089 | else if (fmt[i] == 'E') | |
3090 | { | |
3091 | int j; | |
3092 | for (j = 0; j < XVECLEN (x, i); j++) | |
3093 | get_pattern_stats_1 (stats, XVECEXP (x, i, j)); | |
3094 | } | |
3095 | } | |
3096 | } | |
3097 | ||
3098 | /* Make STATS describe the operands that appear in instruction pattern | |
3099 | PATTERN. */ | |
3100 | ||
3101 | void | |
3102 | get_pattern_stats (struct pattern_stats *stats, rtvec pattern) | |
3103 | { | |
3104 | int i, len; | |
3105 | ||
3106 | stats->max_opno = -1; | |
3107 | stats->max_dup_opno = -1; | |
d5a216fa | 3108 | stats->min_scratch_opno = -1; |
e792559a RS |
3109 | stats->max_scratch_opno = -1; |
3110 | stats->num_dups = 0; | |
3111 | ||
3112 | len = GET_NUM_ELEM (pattern); | |
3113 | for (i = 0; i < len; i++) | |
3114 | get_pattern_stats_1 (stats, RTVEC_ELT (pattern, i)); | |
3115 | ||
3116 | stats->num_generator_args = stats->max_opno + 1; | |
3117 | stats->num_insn_operands = MAX (stats->max_opno, | |
3118 | stats->max_scratch_opno) + 1; | |
3119 | stats->num_operand_vars = MAX (stats->max_opno, | |
3120 | MAX (stats->max_dup_opno, | |
3121 | stats->max_scratch_opno)) + 1; | |
3122 | } | |
3beaff21 | 3123 | |
9d8895c9 RS |
3124 | /* Return the emit_* function that should be used for pattern X, or NULL |
3125 | if we can't pick a particular type at compile time and should instead | |
3126 | fall back to "emit". */ | |
3beaff21 RS |
3127 | |
3128 | const char * | |
3129 | get_emit_function (rtx x) | |
3130 | { | |
3131 | switch (classify_insn (x)) | |
3132 | { | |
3133 | case INSN: | |
3134 | return "emit_insn"; | |
3135 | ||
3136 | case CALL_INSN: | |
3137 | return "emit_call_insn"; | |
3138 | ||
3139 | case JUMP_INSN: | |
3140 | return "emit_jump_insn"; | |
3141 | ||
3142 | case UNKNOWN: | |
9d8895c9 | 3143 | return NULL; |
3beaff21 RS |
3144 | |
3145 | default: | |
3146 | gcc_unreachable (); | |
3147 | } | |
3148 | } | |
3149 | ||
3150 | /* Return true if we must emit a barrier after pattern X. */ | |
3151 | ||
3152 | bool | |
3153 | needs_barrier_p (rtx x) | |
3154 | { | |
3155 | return (GET_CODE (x) == SET | |
3156 | && GET_CODE (SET_DEST (x)) == PC | |
3157 | && GET_CODE (SET_SRC (x)) == LABEL_REF); | |
3158 | } | |
886456e2 RS |
3159 | |
3160 | #define NS "NULL" | |
3161 | #define ZS "'\\0'" | |
3162 | #define OPTAB_CL(o, p, c, b, l) { #o, p, #b, ZS, #l, o, c, UNKNOWN, 1 }, | |
3163 | #define OPTAB_CX(o, p) { #o, p, NULL, NULL, NULL, o, UNKNOWN, UNKNOWN, 1 }, | |
3164 | #define OPTAB_CD(o, p) { #o, p, NS, ZS, NS, o, UNKNOWN, UNKNOWN, 2 }, | |
3165 | #define OPTAB_NL(o, p, c, b, s, l) { #o, p, #b, #s, #l, o, c, c, 3 }, | |
3166 | #define OPTAB_NC(o, p, c) { #o, p, NS, ZS, NS, o, c, c, 3 }, | |
3167 | #define OPTAB_NX(o, p) { #o, p, NULL, NULL, NULL, o, UNKNOWN, UNKNOWN, 3 }, | |
3168 | #define OPTAB_VL(o, p, c, b, s, l) { #o, p, #b, #s, #l, o, c, UNKNOWN, 3 }, | |
3169 | #define OPTAB_VC(o, p, c) { #o, p, NS, ZS, NS, o, c, UNKNOWN, 3 }, | |
3170 | #define OPTAB_VX(o, p) { #o, p, NULL, NULL, NULL, o, UNKNOWN, UNKNOWN, 3 }, | |
3171 | #define OPTAB_DC(o, p, c) { #o, p, NS, ZS, NS, o, c, c, 4 }, | |
3172 | #define OPTAB_D(o, p) { #o, p, NS, ZS, NS, o, UNKNOWN, UNKNOWN, 4 }, | |
3173 | ||
3174 | /* An array of all optabs. Note that the same optab can appear more | |
3175 | than once, with a different pattern. */ | |
3176 | optab_def optabs[] = { | |
3177 | { "unknown_optab", NULL, NS, ZS, NS, unknown_optab, UNKNOWN, UNKNOWN, 0 }, | |
3178 | #include "optabs.def" | |
3179 | }; | |
3180 | ||
3181 | /* The number of entries in optabs[]. */ | |
3182 | unsigned int num_optabs = ARRAY_SIZE (optabs); | |
3183 | ||
3184 | #undef OPTAB_CL | |
3185 | #undef OPTAB_CX | |
3186 | #undef OPTAB_CD | |
3187 | #undef OPTAB_NL | |
3188 | #undef OPTAB_NC | |
3189 | #undef OPTAB_NX | |
3190 | #undef OPTAB_VL | |
3191 | #undef OPTAB_VC | |
3192 | #undef OPTAB_VX | |
3193 | #undef OPTAB_DC | |
3194 | #undef OPTAB_D | |
3195 | ||
3196 | /* Return true if instruction NAME matches pattern PAT, storing information | |
3197 | about the match in P if so. */ | |
3198 | ||
3199 | static bool | |
3200 | match_pattern (optab_pattern *p, const char *name, const char *pat) | |
3201 | { | |
3202 | bool force_float = false; | |
3203 | bool force_int = false; | |
3204 | bool force_partial_int = false; | |
3205 | bool force_fixed = false; | |
3206 | ||
3207 | if (pat == NULL) | |
3208 | return false; | |
3209 | for (; ; ++pat) | |
3210 | { | |
3211 | if (*pat != '$') | |
3212 | { | |
3213 | if (*pat != *name++) | |
3214 | return false; | |
3215 | if (*pat == '\0') | |
3216 | return true; | |
3217 | continue; | |
3218 | } | |
3219 | switch (*++pat) | |
3220 | { | |
3221 | case 'I': | |
3222 | force_int = 1; | |
3223 | break; | |
3224 | case 'P': | |
3225 | force_partial_int = 1; | |
3226 | break; | |
3227 | case 'F': | |
3228 | force_float = 1; | |
3229 | break; | |
3230 | case 'Q': | |
3231 | force_fixed = 1; | |
3232 | break; | |
3233 | ||
3234 | case 'a': | |
3235 | case 'b': | |
3236 | { | |
3237 | int i; | |
3238 | ||
3239 | /* This loop will stop at the first prefix match, so | |
3240 | look through the modes in reverse order, in case | |
3241 | there are extra CC modes and CC is a prefix of the | |
3242 | CC modes (as it should be). */ | |
3243 | for (i = (MAX_MACHINE_MODE) - 1; i >= 0; i--) | |
3244 | { | |
3245 | const char *p, *q; | |
3246 | for (p = GET_MODE_NAME (i), q = name; *p; p++, q++) | |
3247 | if (TOLOWER (*p) != *q) | |
3248 | break; | |
3249 | if (*p == 0 | |
3250 | && (! force_int || mode_class[i] == MODE_INT | |
3251 | || mode_class[i] == MODE_VECTOR_INT) | |
3252 | && (! force_partial_int | |
3253 | || mode_class[i] == MODE_INT | |
3254 | || mode_class[i] == MODE_PARTIAL_INT | |
3255 | || mode_class[i] == MODE_VECTOR_INT) | |
3256 | && (! force_float | |
3257 | || mode_class[i] == MODE_FLOAT | |
3258 | || mode_class[i] == MODE_DECIMAL_FLOAT | |
3259 | || mode_class[i] == MODE_COMPLEX_FLOAT | |
3260 | || mode_class[i] == MODE_VECTOR_FLOAT) | |
3261 | && (! force_fixed | |
3262 | || mode_class[i] == MODE_FRACT | |
3263 | || mode_class[i] == MODE_UFRACT | |
3264 | || mode_class[i] == MODE_ACCUM | |
3265 | || mode_class[i] == MODE_UACCUM | |
3266 | || mode_class[i] == MODE_VECTOR_FRACT | |
3267 | || mode_class[i] == MODE_VECTOR_UFRACT | |
3268 | || mode_class[i] == MODE_VECTOR_ACCUM | |
3269 | || mode_class[i] == MODE_VECTOR_UACCUM)) | |
3270 | break; | |
3271 | } | |
3272 | ||
3273 | if (i < 0) | |
3274 | return false; | |
3275 | name += strlen (GET_MODE_NAME (i)); | |
3276 | if (*pat == 'a') | |
3277 | p->m1 = i; | |
3278 | else | |
3279 | p->m2 = i; | |
3280 | ||
3281 | force_int = false; | |
3282 | force_partial_int = false; | |
3283 | force_float = false; | |
3284 | force_fixed = false; | |
3285 | } | |
3286 | break; | |
3287 | ||
3288 | default: | |
3289 | gcc_unreachable (); | |
3290 | } | |
3291 | } | |
3292 | } | |
3293 | ||
3294 | /* Return true if NAME is the name of an optab, describing it in P if so. */ | |
3295 | ||
3296 | bool | |
3297 | find_optab (optab_pattern *p, const char *name) | |
3298 | { | |
3299 | if (*name == 0 || *name == '*') | |
3300 | return false; | |
3301 | ||
3302 | /* See if NAME matches one of the patterns we have for the optabs | |
3303 | we know about. */ | |
3304 | for (unsigned int pindex = 0; pindex < ARRAY_SIZE (optabs); pindex++) | |
3305 | { | |
3306 | p->m1 = p->m2 = 0; | |
3307 | if (match_pattern (p, name, optabs[pindex].pattern)) | |
3308 | { | |
3309 | p->name = name; | |
3310 | p->op = optabs[pindex].op; | |
3311 | p->sort_num = (p->op << 16) | (p->m2 << 8) | p->m1; | |
3312 | return true; | |
3313 | } | |
3314 | } | |
3315 | return false; | |
3316 | } |