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3916d6d8 | 1 | /* Support routines for the various generation passes. |
d1e082c2 | 2 | Copyright (C) 2000-2013 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" |
2199e5fa | 27 | #include "hashtab.h" |
10692477 | 28 | #include "read-md.h" |
c88c0d42 CP |
29 | #include "gensupport.h" |
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 | ||
e714561a SB |
46 | /* Counter for patterns that generate code: define_insn, define_expand, |
47 | define_split, define_peephole, and define_peephole2. See read_md_rtx(). | |
48 | Any define_insn_and_splits are already in separate queues so that the | |
49 | insn and the splitter get a unique number also. */ | |
c88c0d42 | 50 | static int sequence_num; |
3262c1f5 RH |
51 | |
52 | static int predicable_default; | |
53 | static const char *predicable_true; | |
54 | static const char *predicable_false; | |
55 | ||
477c104e MK |
56 | static const char *subst_true = "yes"; |
57 | static const char *subst_false = "no"; | |
58 | ||
2199e5fa ZW |
59 | static htab_t condition_table; |
60 | ||
477c104e MK |
61 | /* We initially queue all patterns, process the define_insn, |
62 | define_cond_exec and define_subst patterns, then return | |
63 | them one at a time. */ | |
c88c0d42 | 64 | |
3262c1f5 RH |
65 | struct queue_elem |
66 | { | |
67 | rtx data; | |
821e35ba | 68 | const char *filename; |
3262c1f5 RH |
69 | int lineno; |
70 | struct queue_elem *next; | |
a406f566 MM |
71 | /* In a DEFINE_INSN that came from a DEFINE_INSN_AND_SPLIT, SPLIT |
72 | points to the generated DEFINE_SPLIT. */ | |
73 | struct queue_elem *split; | |
c88c0d42 CP |
74 | }; |
75 | ||
64aad689 AK |
76 | #define MNEMONIC_ATTR_NAME "mnemonic" |
77 | #define MNEMONIC_HTAB_SIZE 1024 | |
78 | ||
3262c1f5 RH |
79 | static struct queue_elem *define_attr_queue; |
80 | static struct queue_elem **define_attr_tail = &define_attr_queue; | |
e543e219 ZW |
81 | static struct queue_elem *define_pred_queue; |
82 | static struct queue_elem **define_pred_tail = &define_pred_queue; | |
3262c1f5 RH |
83 | static struct queue_elem *define_insn_queue; |
84 | static struct queue_elem **define_insn_tail = &define_insn_queue; | |
85 | static struct queue_elem *define_cond_exec_queue; | |
86 | static struct queue_elem **define_cond_exec_tail = &define_cond_exec_queue; | |
477c104e MK |
87 | static struct queue_elem *define_subst_queue; |
88 | static struct queue_elem **define_subst_tail = &define_subst_queue; | |
3262c1f5 RH |
89 | static struct queue_elem *other_queue; |
90 | static struct queue_elem **other_tail = &other_queue; | |
477c104e MK |
91 | static struct queue_elem *define_subst_attr_queue; |
92 | static struct queue_elem **define_subst_attr_tail = &define_subst_attr_queue; | |
c88c0d42 | 93 | |
a406f566 MM |
94 | static struct queue_elem *queue_pattern (rtx, struct queue_elem ***, |
95 | const char *, int); | |
04d8aa70 | 96 | |
3d7aafde AJ |
97 | static void remove_constraints (rtx); |
98 | static void process_rtx (rtx, int); | |
99 | ||
100 | static int is_predicable (struct queue_elem *); | |
101 | static void identify_predicable_attribute (void); | |
102 | static int n_alternatives (const char *); | |
103 | static void collect_insn_data (rtx, int *, int *); | |
104 | static rtx alter_predicate_for_insn (rtx, int, int, int); | |
105 | static const char *alter_test_for_insn (struct queue_elem *, | |
106 | struct queue_elem *); | |
107 | static char *shift_output_template (char *, const char *, int); | |
108 | static const char *alter_output_for_insn (struct queue_elem *, | |
109 | struct queue_elem *, | |
110 | int, int); | |
111 | static void process_one_cond_exec (struct queue_elem *); | |
112 | static void process_define_cond_exec (void); | |
e543e219 | 113 | static void init_predicate_table (void); |
0458fe77 | 114 | static void record_insn_name (int, const char *); |
477c104e MK |
115 | |
116 | static bool has_subst_attribute (struct queue_elem *, struct queue_elem *); | |
117 | static bool subst_pattern_match (rtx, rtx, int); | |
118 | static int get_alternatives_number (rtx, int *, int); | |
119 | static const char * alter_output_for_subst_insn (rtx, int); | |
120 | static void alter_attrs_for_subst_insn (struct queue_elem *, int); | |
121 | static void process_substs_on_one_elem (struct queue_elem *, | |
122 | struct queue_elem *); | |
123 | static rtx subst_dup (rtx, int, int); | |
124 | static void process_define_subst (void); | |
125 | ||
126 | static const char * duplicate_alternatives (const char *, int); | |
127 | static const char * duplicate_each_alternative (const char * str, int n_dup); | |
128 | ||
129 | typedef const char * (*constraints_handler_t) (const char *, int); | |
130 | static rtx alter_constraints (rtx, int, constraints_handler_t); | |
131 | static rtx adjust_operands_numbers (rtx); | |
132 | static rtx replace_duplicating_operands_in_pattern (rtx); | |
3916d6d8 | 133 | \f |
10b76d73 RK |
134 | /* Make a version of gen_rtx_CONST_INT so that GEN_INT can be used in |
135 | the gensupport programs. */ | |
136 | ||
137 | rtx | |
e18476eb | 138 | gen_rtx_CONST_INT (enum machine_mode ARG_UNUSED (mode), |
3d7aafde | 139 | HOST_WIDE_INT arg) |
10b76d73 RK |
140 | { |
141 | rtx rt = rtx_alloc (CONST_INT); | |
142 | ||
143 | XWINT (rt, 0) = arg; | |
144 | return rt; | |
145 | } | |
3916d6d8 | 146 | \f |
77059241 RS |
147 | /* Predicate handling. |
148 | ||
149 | We construct from the machine description a table mapping each | |
150 | predicate to a list of the rtl codes it can possibly match. The | |
151 | function 'maybe_both_true' uses it to deduce that there are no | |
152 | expressions that can be matches by certain pairs of tree nodes. | |
153 | Also, if a predicate can match only one code, we can hardwire that | |
154 | code into the node testing the predicate. | |
155 | ||
156 | Some predicates are flagged as special. validate_pattern will not | |
157 | warn about modeless match_operand expressions if they have a | |
158 | special predicate. Predicates that allow only constants are also | |
159 | treated as special, for this purpose. | |
160 | ||
161 | validate_pattern will warn about predicates that allow non-lvalues | |
162 | when they appear in destination operands. | |
163 | ||
164 | Calculating the set of rtx codes that can possibly be accepted by a | |
165 | predicate expression EXP requires a three-state logic: any given | |
166 | subexpression may definitively accept a code C (Y), definitively | |
167 | reject a code C (N), or may have an indeterminate effect (I). N | |
168 | and I is N; Y or I is Y; Y and I, N or I are both I. Here are full | |
169 | truth tables. | |
170 | ||
171 | a b a&b a|b | |
172 | Y Y Y Y | |
173 | N Y N Y | |
174 | N N N N | |
175 | I Y I Y | |
176 | I N N I | |
177 | I I I I | |
178 | ||
179 | We represent Y with 1, N with 0, I with 2. If any code is left in | |
180 | an I state by the complete expression, we must assume that that | |
181 | code can be accepted. */ | |
182 | ||
183 | #define N 0 | |
184 | #define Y 1 | |
185 | #define I 2 | |
186 | ||
187 | #define TRISTATE_AND(a,b) \ | |
188 | ((a) == I ? ((b) == N ? N : I) : \ | |
189 | (b) == I ? ((a) == N ? N : I) : \ | |
190 | (a) && (b)) | |
191 | ||
192 | #define TRISTATE_OR(a,b) \ | |
193 | ((a) == I ? ((b) == Y ? Y : I) : \ | |
194 | (b) == I ? ((a) == Y ? Y : I) : \ | |
195 | (a) || (b)) | |
196 | ||
197 | #define TRISTATE_NOT(a) \ | |
198 | ((a) == I ? I : !(a)) | |
199 | ||
200 | /* 0 means no warning about that code yet, 1 means warned. */ | |
201 | static char did_you_mean_codes[NUM_RTX_CODE]; | |
202 | ||
203 | /* Recursively calculate the set of rtx codes accepted by the | |
204 | predicate expression EXP, writing the result to CODES. LINENO is | |
205 | the line number on which the directive containing EXP appeared. */ | |
206 | ||
207 | static void | |
208 | compute_predicate_codes (rtx exp, int lineno, char codes[NUM_RTX_CODE]) | |
209 | { | |
210 | char op0_codes[NUM_RTX_CODE]; | |
211 | char op1_codes[NUM_RTX_CODE]; | |
212 | char op2_codes[NUM_RTX_CODE]; | |
213 | int i; | |
214 | ||
215 | switch (GET_CODE (exp)) | |
216 | { | |
217 | case AND: | |
218 | compute_predicate_codes (XEXP (exp, 0), lineno, op0_codes); | |
219 | compute_predicate_codes (XEXP (exp, 1), lineno, op1_codes); | |
220 | for (i = 0; i < NUM_RTX_CODE; i++) | |
221 | codes[i] = TRISTATE_AND (op0_codes[i], op1_codes[i]); | |
222 | break; | |
223 | ||
224 | case IOR: | |
225 | compute_predicate_codes (XEXP (exp, 0), lineno, op0_codes); | |
226 | compute_predicate_codes (XEXP (exp, 1), lineno, op1_codes); | |
227 | for (i = 0; i < NUM_RTX_CODE; i++) | |
228 | codes[i] = TRISTATE_OR (op0_codes[i], op1_codes[i]); | |
229 | break; | |
230 | case NOT: | |
231 | compute_predicate_codes (XEXP (exp, 0), lineno, op0_codes); | |
232 | for (i = 0; i < NUM_RTX_CODE; i++) | |
233 | codes[i] = TRISTATE_NOT (op0_codes[i]); | |
234 | break; | |
235 | ||
236 | case IF_THEN_ELSE: | |
237 | /* a ? b : c accepts the same codes as (a & b) | (!a & c). */ | |
238 | compute_predicate_codes (XEXP (exp, 0), lineno, op0_codes); | |
239 | compute_predicate_codes (XEXP (exp, 1), lineno, op1_codes); | |
240 | compute_predicate_codes (XEXP (exp, 2), lineno, op2_codes); | |
241 | for (i = 0; i < NUM_RTX_CODE; i++) | |
242 | codes[i] = TRISTATE_OR (TRISTATE_AND (op0_codes[i], op1_codes[i]), | |
243 | TRISTATE_AND (TRISTATE_NOT (op0_codes[i]), | |
244 | op2_codes[i])); | |
245 | break; | |
246 | ||
247 | case MATCH_CODE: | |
248 | /* MATCH_CODE allows a specified list of codes. However, if it | |
249 | does not apply to the top level of the expression, it does not | |
250 | constrain the set of codes for the top level. */ | |
251 | if (XSTR (exp, 1)[0] != '\0') | |
252 | { | |
253 | memset (codes, Y, NUM_RTX_CODE); | |
254 | break; | |
255 | } | |
256 | ||
257 | memset (codes, N, NUM_RTX_CODE); | |
258 | { | |
259 | const char *next_code = XSTR (exp, 0); | |
260 | const char *code; | |
261 | ||
262 | if (*next_code == '\0') | |
263 | { | |
264 | error_with_line (lineno, "empty match_code expression"); | |
265 | break; | |
266 | } | |
267 | ||
268 | while ((code = scan_comma_elt (&next_code)) != 0) | |
269 | { | |
270 | size_t n = next_code - code; | |
271 | int found_it = 0; | |
272 | ||
273 | for (i = 0; i < NUM_RTX_CODE; i++) | |
274 | if (!strncmp (code, GET_RTX_NAME (i), n) | |
275 | && GET_RTX_NAME (i)[n] == '\0') | |
276 | { | |
277 | codes[i] = Y; | |
278 | found_it = 1; | |
279 | break; | |
280 | } | |
281 | if (!found_it) | |
282 | { | |
283 | error_with_line (lineno, | |
284 | "match_code \"%.*s\" matches nothing", | |
285 | (int) n, code); | |
286 | for (i = 0; i < NUM_RTX_CODE; i++) | |
287 | if (!strncasecmp (code, GET_RTX_NAME (i), n) | |
288 | && GET_RTX_NAME (i)[n] == '\0' | |
289 | && !did_you_mean_codes[i]) | |
290 | { | |
291 | did_you_mean_codes[i] = 1; | |
292 | message_with_line (lineno, "(did you mean \"%s\"?)", | |
293 | GET_RTX_NAME (i)); | |
294 | } | |
295 | } | |
296 | } | |
297 | } | |
298 | break; | |
299 | ||
300 | case MATCH_OPERAND: | |
301 | /* MATCH_OPERAND disallows the set of codes that the named predicate | |
302 | disallows, and is indeterminate for the codes that it does allow. */ | |
303 | { | |
304 | struct pred_data *p = lookup_predicate (XSTR (exp, 1)); | |
305 | if (!p) | |
306 | { | |
307 | error_with_line (lineno, "reference to unknown predicate '%s'", | |
308 | XSTR (exp, 1)); | |
309 | break; | |
310 | } | |
311 | for (i = 0; i < NUM_RTX_CODE; i++) | |
312 | codes[i] = p->codes[i] ? I : N; | |
313 | } | |
314 | break; | |
315 | ||
316 | ||
317 | case MATCH_TEST: | |
318 | /* (match_test WHATEVER) is completely indeterminate. */ | |
319 | memset (codes, I, NUM_RTX_CODE); | |
320 | break; | |
321 | ||
322 | default: | |
323 | error_with_line (lineno, | |
324 | "'%s' cannot be used in a define_predicate expression", | |
325 | GET_RTX_NAME (GET_CODE (exp))); | |
326 | memset (codes, I, NUM_RTX_CODE); | |
327 | break; | |
328 | } | |
329 | } | |
330 | ||
331 | #undef TRISTATE_OR | |
332 | #undef TRISTATE_AND | |
333 | #undef TRISTATE_NOT | |
334 | ||
335 | /* Return true if NAME is a valid predicate name. */ | |
336 | ||
337 | static bool | |
338 | valid_predicate_name_p (const char *name) | |
339 | { | |
340 | const char *p; | |
341 | ||
342 | if (!ISALPHA (name[0]) && name[0] != '_') | |
343 | return false; | |
344 | for (p = name + 1; *p; p++) | |
345 | if (!ISALNUM (*p) && *p != '_') | |
346 | return false; | |
347 | return true; | |
348 | } | |
349 | ||
350 | /* Process define_predicate directive DESC, which appears on line number | |
351 | LINENO. Compute the set of codes that can be matched, and record this | |
352 | as a known predicate. */ | |
353 | ||
354 | static void | |
355 | process_define_predicate (rtx desc, int lineno) | |
356 | { | |
357 | struct pred_data *pred; | |
358 | char codes[NUM_RTX_CODE]; | |
359 | int i; | |
360 | ||
361 | if (!valid_predicate_name_p (XSTR (desc, 0))) | |
362 | { | |
363 | error_with_line (lineno, | |
364 | "%s: predicate name must be a valid C function name", | |
365 | XSTR (desc, 0)); | |
366 | return; | |
367 | } | |
368 | ||
369 | pred = XCNEW (struct pred_data); | |
370 | pred->name = XSTR (desc, 0); | |
371 | pred->exp = XEXP (desc, 1); | |
372 | pred->c_block = XSTR (desc, 2); | |
373 | if (GET_CODE (desc) == DEFINE_SPECIAL_PREDICATE) | |
374 | pred->special = true; | |
375 | ||
376 | compute_predicate_codes (XEXP (desc, 1), lineno, codes); | |
377 | ||
378 | for (i = 0; i < NUM_RTX_CODE; i++) | |
379 | if (codes[i] != N) | |
380 | add_predicate_code (pred, (enum rtx_code) i); | |
381 | ||
382 | add_predicate (pred); | |
383 | } | |
384 | #undef I | |
385 | #undef N | |
386 | #undef Y | |
387 | \f | |
a406f566 MM |
388 | /* Queue PATTERN on LIST_TAIL. Return the address of the new queue |
389 | element. */ | |
3262c1f5 | 390 | |
a406f566 | 391 | static struct queue_elem * |
3d7aafde AJ |
392 | queue_pattern (rtx pattern, struct queue_elem ***list_tail, |
393 | const char *filename, int lineno) | |
3262c1f5 | 394 | { |
5d038c4c | 395 | struct queue_elem *e = XNEW(struct queue_elem); |
3262c1f5 | 396 | e->data = pattern; |
821e35ba | 397 | e->filename = filename; |
3262c1f5 RH |
398 | e->lineno = lineno; |
399 | e->next = NULL; | |
a406f566 | 400 | e->split = NULL; |
3262c1f5 RH |
401 | **list_tail = e; |
402 | *list_tail = &e->next; | |
a406f566 | 403 | return e; |
3262c1f5 RH |
404 | } |
405 | ||
477c104e MK |
406 | /* Remove element ELEM from QUEUE. */ |
407 | static void | |
408 | remove_from_queue (struct queue_elem *elem, struct queue_elem **queue) | |
409 | { | |
410 | struct queue_elem *prev, *e; | |
411 | prev = NULL; | |
412 | for (e = *queue; e ; e = e->next) | |
413 | { | |
414 | if (e == elem) | |
415 | break; | |
416 | prev = e; | |
417 | } | |
418 | if (e == NULL) | |
419 | return; | |
420 | ||
421 | if (prev) | |
422 | prev->next = elem->next; | |
423 | else | |
424 | *queue = elem->next; | |
425 | } | |
426 | ||
0bddee8e BS |
427 | /* Build a define_attr for an binary attribute with name NAME and |
428 | possible values "yes" and "no", and queue it. */ | |
429 | static void | |
430 | add_define_attr (const char *name) | |
431 | { | |
432 | struct queue_elem *e = XNEW(struct queue_elem); | |
433 | rtx t1 = rtx_alloc (DEFINE_ATTR); | |
434 | XSTR (t1, 0) = name; | |
435 | XSTR (t1, 1) = "no,yes"; | |
436 | XEXP (t1, 2) = rtx_alloc (CONST_STRING); | |
437 | XSTR (XEXP (t1, 2), 0) = "yes"; | |
438 | e->data = t1; | |
439 | e->filename = "built-in"; | |
440 | e->lineno = -1; | |
441 | e->next = define_attr_queue; | |
442 | define_attr_queue = e; | |
443 | ||
444 | } | |
445 | ||
c88c0d42 CP |
446 | /* Recursively remove constraints from an rtx. */ |
447 | ||
448 | static void | |
3d7aafde | 449 | remove_constraints (rtx part) |
c88c0d42 | 450 | { |
b3694847 SS |
451 | int i, j; |
452 | const char *format_ptr; | |
c88c0d42 CP |
453 | |
454 | if (part == 0) | |
455 | return; | |
456 | ||
457 | if (GET_CODE (part) == MATCH_OPERAND) | |
458 | XSTR (part, 2) = ""; | |
459 | else if (GET_CODE (part) == MATCH_SCRATCH) | |
460 | XSTR (part, 1) = ""; | |
461 | ||
462 | format_ptr = GET_RTX_FORMAT (GET_CODE (part)); | |
463 | ||
464 | for (i = 0; i < GET_RTX_LENGTH (GET_CODE (part)); i++) | |
465 | switch (*format_ptr++) | |
466 | { | |
467 | case 'e': | |
468 | case 'u': | |
469 | remove_constraints (XEXP (part, i)); | |
470 | break; | |
471 | case 'E': | |
472 | if (XVEC (part, i) != NULL) | |
473 | for (j = 0; j < XVECLEN (part, i); j++) | |
474 | remove_constraints (XVECEXP (part, i, j)); | |
475 | break; | |
476 | } | |
477 | } | |
478 | ||
d91edf86 | 479 | /* Process a top level rtx in some way, queuing as appropriate. */ |
c88c0d42 CP |
480 | |
481 | static void | |
3d7aafde | 482 | process_rtx (rtx desc, int lineno) |
3262c1f5 RH |
483 | { |
484 | switch (GET_CODE (desc)) | |
485 | { | |
486 | case DEFINE_INSN: | |
d2a3ce4e | 487 | queue_pattern (desc, &define_insn_tail, read_md_filename, lineno); |
3262c1f5 RH |
488 | break; |
489 | ||
490 | case DEFINE_COND_EXEC: | |
d2a3ce4e | 491 | queue_pattern (desc, &define_cond_exec_tail, read_md_filename, lineno); |
3262c1f5 RH |
492 | break; |
493 | ||
477c104e MK |
494 | case DEFINE_SUBST: |
495 | queue_pattern (desc, &define_subst_tail, read_md_filename, lineno); | |
496 | break; | |
497 | ||
498 | case DEFINE_SUBST_ATTR: | |
499 | queue_pattern (desc, &define_subst_attr_tail, read_md_filename, lineno); | |
500 | break; | |
501 | ||
3262c1f5 | 502 | case DEFINE_ATTR: |
8f4fe86c | 503 | case DEFINE_ENUM_ATTR: |
d2a3ce4e | 504 | queue_pattern (desc, &define_attr_tail, read_md_filename, lineno); |
3262c1f5 RH |
505 | break; |
506 | ||
e543e219 ZW |
507 | case DEFINE_PREDICATE: |
508 | case DEFINE_SPECIAL_PREDICATE: | |
77059241 RS |
509 | process_define_predicate (desc, lineno); |
510 | /* Fall through. */ | |
511 | ||
f38840db ZW |
512 | case DEFINE_CONSTRAINT: |
513 | case DEFINE_REGISTER_CONSTRAINT: | |
514 | case DEFINE_MEMORY_CONSTRAINT: | |
515 | case DEFINE_ADDRESS_CONSTRAINT: | |
d2a3ce4e | 516 | queue_pattern (desc, &define_pred_tail, read_md_filename, lineno); |
e543e219 ZW |
517 | break; |
518 | ||
3262c1f5 RH |
519 | case DEFINE_INSN_AND_SPLIT: |
520 | { | |
521 | const char *split_cond; | |
20217ac1 KG |
522 | rtx split; |
523 | rtvec attr; | |
de4bfbcb | 524 | int i; |
a406f566 MM |
525 | struct queue_elem *insn_elem; |
526 | struct queue_elem *split_elem; | |
3262c1f5 | 527 | |
dc297297 | 528 | /* Create a split with values from the insn_and_split. */ |
3262c1f5 | 529 | split = rtx_alloc (DEFINE_SPLIT); |
de4bfbcb RH |
530 | |
531 | i = XVECLEN (desc, 1); | |
fbd40359 | 532 | XVEC (split, 0) = rtvec_alloc (i); |
de4bfbcb RH |
533 | while (--i >= 0) |
534 | { | |
535 | XVECEXP (split, 0, i) = copy_rtx (XVECEXP (desc, 1, i)); | |
536 | remove_constraints (XVECEXP (split, 0, i)); | |
537 | } | |
3262c1f5 RH |
538 | |
539 | /* If the split condition starts with "&&", append it to the | |
540 | insn condition to create the new split condition. */ | |
541 | split_cond = XSTR (desc, 4); | |
542 | if (split_cond[0] == '&' && split_cond[1] == '&') | |
7445392c | 543 | { |
d2a3ce4e | 544 | copy_md_ptr_loc (split_cond + 2, split_cond); |
7445392c RS |
545 | split_cond = join_c_conditions (XSTR (desc, 2), split_cond + 2); |
546 | } | |
3262c1f5 RH |
547 | XSTR (split, 1) = split_cond; |
548 | XVEC (split, 2) = XVEC (desc, 5); | |
549 | XSTR (split, 3) = XSTR (desc, 6); | |
550 | ||
551 | /* Fix up the DEFINE_INSN. */ | |
ee138cf8 | 552 | attr = XVEC (desc, 7); |
3262c1f5 | 553 | PUT_CODE (desc, DEFINE_INSN); |
ee138cf8 | 554 | XVEC (desc, 4) = attr; |
3262c1f5 RH |
555 | |
556 | /* Queue them. */ | |
a406f566 | 557 | insn_elem |
d2a3ce4e | 558 | = queue_pattern (desc, &define_insn_tail, read_md_filename, |
a406f566 MM |
559 | lineno); |
560 | split_elem | |
d2a3ce4e | 561 | = queue_pattern (split, &other_tail, read_md_filename, lineno); |
a406f566 | 562 | insn_elem->split = split_elem; |
3262c1f5 RH |
563 | break; |
564 | } | |
565 | ||
566 | default: | |
d2a3ce4e | 567 | queue_pattern (desc, &other_tail, read_md_filename, lineno); |
3262c1f5 | 568 | break; |
c88c0d42 CP |
569 | } |
570 | } | |
3916d6d8 | 571 | \f |
3262c1f5 RH |
572 | /* Return true if attribute PREDICABLE is true for ELEM, which holds |
573 | a DEFINE_INSN. */ | |
574 | ||
575 | static int | |
3d7aafde | 576 | is_predicable (struct queue_elem *elem) |
3262c1f5 RH |
577 | { |
578 | rtvec vec = XVEC (elem->data, 4); | |
579 | const char *value; | |
580 | int i; | |
581 | ||
582 | if (! vec) | |
583 | return predicable_default; | |
584 | ||
585 | for (i = GET_NUM_ELEM (vec) - 1; i >= 0; --i) | |
586 | { | |
587 | rtx sub = RTVEC_ELT (vec, i); | |
588 | switch (GET_CODE (sub)) | |
589 | { | |
590 | case SET_ATTR: | |
591 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
592 | { | |
593 | value = XSTR (sub, 1); | |
594 | goto found; | |
595 | } | |
596 | break; | |
597 | ||
598 | case SET_ATTR_ALTERNATIVE: | |
599 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
600 | { | |
bb933490 RS |
601 | error_with_line (elem->lineno, |
602 | "multiple alternatives for `predicable'"); | |
3262c1f5 RH |
603 | return 0; |
604 | } | |
605 | break; | |
606 | ||
607 | case SET: | |
608 | if (GET_CODE (SET_DEST (sub)) != ATTR | |
609 | || strcmp (XSTR (SET_DEST (sub), 0), "predicable") != 0) | |
610 | break; | |
611 | sub = SET_SRC (sub); | |
612 | if (GET_CODE (sub) == CONST_STRING) | |
613 | { | |
614 | value = XSTR (sub, 0); | |
615 | goto found; | |
616 | } | |
617 | ||
618 | /* ??? It would be possible to handle this if we really tried. | |
619 | It's not easy though, and I'm not going to bother until it | |
620 | really proves necessary. */ | |
bb933490 RS |
621 | error_with_line (elem->lineno, |
622 | "non-constant value for `predicable'"); | |
3262c1f5 RH |
623 | return 0; |
624 | ||
625 | default: | |
b2d59f6f | 626 | gcc_unreachable (); |
3262c1f5 RH |
627 | } |
628 | } | |
629 | ||
630 | return predicable_default; | |
631 | ||
632 | found: | |
0bddee8e BS |
633 | /* Find out which value we're looking at. Multiple alternatives means at |
634 | least one is predicable. */ | |
3262c1f5 | 635 | if (strchr (value, ',') != NULL) |
0bddee8e | 636 | return 1; |
3262c1f5 RH |
637 | if (strcmp (value, predicable_true) == 0) |
638 | return 1; | |
639 | if (strcmp (value, predicable_false) == 0) | |
640 | return 0; | |
641 | ||
bb933490 RS |
642 | error_with_line (elem->lineno, |
643 | "unknown value `%s' for `predicable' attribute", value); | |
3262c1f5 RH |
644 | return 0; |
645 | } | |
646 | ||
477c104e MK |
647 | /* Find attribute SUBST in ELEM and assign NEW_VALUE to it. */ |
648 | static void | |
649 | change_subst_attribute (struct queue_elem *elem, | |
650 | struct queue_elem *subst_elem, | |
651 | const char *new_value) | |
652 | { | |
653 | rtvec attrs_vec = XVEC (elem->data, 4); | |
654 | const char *subst_name = XSTR (subst_elem->data, 0); | |
655 | int i; | |
656 | ||
657 | if (! attrs_vec) | |
658 | return; | |
659 | ||
660 | for (i = GET_NUM_ELEM (attrs_vec) - 1; i >= 0; --i) | |
661 | { | |
662 | rtx cur_attr = RTVEC_ELT (attrs_vec, i); | |
663 | if (GET_CODE (cur_attr) != SET_ATTR) | |
664 | continue; | |
665 | if (strcmp (XSTR (cur_attr, 0), subst_name) == 0) | |
666 | { | |
667 | XSTR (cur_attr, 1) = new_value; | |
668 | return; | |
669 | } | |
670 | } | |
671 | } | |
672 | ||
673 | /* Return true if ELEM has the attribute with the name of DEFINE_SUBST | |
674 | represented by SUBST_ELEM and this attribute has value SUBST_TRUE. | |
675 | DEFINE_SUBST isn't applied to patterns without such attribute. In other | |
676 | words, we suppose the default value of the attribute to be 'no' since it is | |
677 | always generated automaticaly in read-rtl.c. */ | |
678 | static bool | |
679 | has_subst_attribute (struct queue_elem *elem, struct queue_elem *subst_elem) | |
680 | { | |
681 | rtvec attrs_vec = XVEC (elem->data, 4); | |
682 | const char *value, *subst_name = XSTR (subst_elem->data, 0); | |
683 | int i; | |
684 | ||
685 | if (! attrs_vec) | |
686 | return false; | |
687 | ||
688 | for (i = GET_NUM_ELEM (attrs_vec) - 1; i >= 0; --i) | |
689 | { | |
690 | rtx cur_attr = RTVEC_ELT (attrs_vec, i); | |
691 | switch (GET_CODE (cur_attr)) | |
692 | { | |
693 | case SET_ATTR: | |
694 | if (strcmp (XSTR (cur_attr, 0), subst_name) == 0) | |
695 | { | |
696 | value = XSTR (cur_attr, 1); | |
697 | goto found; | |
698 | } | |
699 | break; | |
700 | ||
701 | case SET: | |
702 | if (GET_CODE (SET_DEST (cur_attr)) != ATTR | |
703 | || strcmp (XSTR (SET_DEST (cur_attr), 0), subst_name) != 0) | |
704 | break; | |
705 | cur_attr = SET_SRC (cur_attr); | |
706 | if (GET_CODE (cur_attr) == CONST_STRING) | |
707 | { | |
708 | value = XSTR (cur_attr, 0); | |
709 | goto found; | |
710 | } | |
711 | ||
712 | /* Only (set_attr "subst" "yes/no") and | |
713 | (set (attr "subst" (const_string "yes/no"))) | |
714 | are currently allowed. */ | |
715 | error_with_line (elem->lineno, | |
716 | "unsupported value for `%s'", subst_name); | |
717 | return false; | |
718 | ||
719 | case SET_ATTR_ALTERNATIVE: | |
720 | error_with_line (elem->lineno, | |
721 | "%s: `set_attr_alternative' is unsupported by " | |
722 | "`define_subst'", | |
723 | XSTR (elem->data, 0)); | |
724 | return false; | |
725 | ||
726 | ||
727 | default: | |
728 | gcc_unreachable (); | |
729 | } | |
730 | } | |
731 | ||
732 | return false; | |
733 | ||
734 | found: | |
735 | if (strcmp (value, subst_true) == 0) | |
736 | return true; | |
737 | if (strcmp (value, subst_false) == 0) | |
738 | return false; | |
739 | ||
740 | error_with_line (elem->lineno, | |
741 | "unknown value `%s' for `%s' attribute", value, subst_name); | |
742 | return false; | |
743 | } | |
744 | ||
745 | /* Compare RTL-template of original define_insn X to input RTL-template of | |
746 | define_subst PT. Return 1 if the templates match, 0 otherwise. | |
747 | During the comparison, the routine also fills global_array OPERAND_DATA. */ | |
748 | static bool | |
749 | subst_pattern_match (rtx x, rtx pt, int lineno) | |
750 | { | |
751 | RTX_CODE code, code_pt; | |
752 | int i, j, len; | |
753 | const char *fmt, *pred_name; | |
754 | ||
755 | code = GET_CODE (x); | |
756 | code_pt = GET_CODE (pt); | |
757 | ||
758 | if (code_pt == MATCH_OPERAND) | |
759 | { | |
760 | /* MATCH_DUP, and MATCH_OP_DUP don't have a specified mode, so we | |
761 | always accept them. */ | |
762 | if (GET_MODE (pt) != VOIDmode && GET_MODE (x) != GET_MODE (pt) | |
763 | && (code != MATCH_DUP && code != MATCH_OP_DUP)) | |
764 | return false; /* Modes don't match. */ | |
765 | ||
766 | if (code == MATCH_OPERAND) | |
767 | { | |
768 | pred_name = XSTR (pt, 1); | |
769 | if (pred_name[0] != 0) | |
770 | { | |
771 | const struct pred_data *pred_pt = lookup_predicate (pred_name); | |
772 | if (!pred_pt || pred_pt != lookup_predicate (XSTR (x, 1))) | |
773 | return false; /* Predicates don't match. */ | |
774 | } | |
775 | } | |
776 | ||
777 | gcc_assert (XINT (pt, 0) >= 0 && XINT (pt, 0) < MAX_OPERANDS); | |
778 | operand_data[XINT (pt, 0)] = x; | |
779 | return true; | |
780 | } | |
781 | ||
782 | if (code_pt == MATCH_OPERATOR) | |
783 | { | |
784 | int x_vecexp_pos = -1; | |
785 | ||
786 | /* Compare modes. */ | |
787 | if (GET_MODE (pt) != VOIDmode && GET_MODE (x) != GET_MODE (pt)) | |
788 | return false; | |
789 | ||
790 | /* In case X is also match_operator, compare predicates. */ | |
791 | if (code == MATCH_OPERATOR) | |
792 | { | |
793 | pred_name = XSTR (pt, 1); | |
794 | if (pred_name[0] != 0) | |
795 | { | |
796 | const struct pred_data *pred_pt = lookup_predicate (pred_name); | |
797 | if (!pred_pt || pred_pt != lookup_predicate (XSTR (x, 1))) | |
798 | return false; | |
799 | } | |
800 | } | |
801 | ||
802 | /* Compare operands. | |
803 | MATCH_OPERATOR in input template could match in original template | |
804 | either 1) MATCH_OPERAND, 2) UNSPEC, 3) ordinary operation (like PLUS). | |
805 | In the first case operands are at (XVECEXP (x, 2, j)), in the second | |
806 | - at (XVECEXP (x, 0, j)), in the last one - (XEXP (x, j)). | |
807 | X_VECEXP_POS variable shows, where to look for these operands. */ | |
808 | if (code == UNSPEC | |
809 | || code == UNSPEC_VOLATILE) | |
810 | x_vecexp_pos = 0; | |
811 | else if (code == MATCH_OPERATOR) | |
812 | x_vecexp_pos = 2; | |
813 | else | |
814 | x_vecexp_pos = -1; | |
815 | ||
816 | /* MATCH_OPERATOR or UNSPEC case. */ | |
817 | if (x_vecexp_pos >= 0) | |
818 | { | |
819 | /* Compare operands number in X and PT. */ | |
820 | if (XVECLEN (x, x_vecexp_pos) != XVECLEN (pt, 2)) | |
821 | return false; | |
822 | for (j = 0; j < XVECLEN (pt, 2); j++) | |
823 | if (!subst_pattern_match (XVECEXP (x, x_vecexp_pos, j), | |
824 | XVECEXP (pt, 2, j), lineno)) | |
825 | return false; | |
826 | } | |
827 | ||
828 | /* Ordinary operator. */ | |
829 | else | |
830 | { | |
831 | /* Compare operands number in X and PT. | |
832 | We count operands differently for X and PT since we compare | |
833 | an operator (with operands directly in RTX) and MATCH_OPERATOR | |
834 | (that has a vector with operands). */ | |
835 | if (GET_RTX_LENGTH (code) != XVECLEN (pt, 2)) | |
836 | return false; | |
837 | for (j = 0; j < XVECLEN (pt, 2); j++) | |
838 | if (!subst_pattern_match (XEXP (x, j), XVECEXP (pt, 2, j), lineno)) | |
839 | return false; | |
840 | } | |
841 | ||
842 | /* Store the operand to OPERAND_DATA array. */ | |
843 | gcc_assert (XINT (pt, 0) >= 0 && XINT (pt, 0) < MAX_OPERANDS); | |
844 | operand_data[XINT (pt, 0)] = x; | |
845 | return true; | |
846 | } | |
847 | ||
848 | if (code_pt == MATCH_PAR_DUP | |
849 | || code_pt == MATCH_DUP | |
850 | || code_pt == MATCH_OP_DUP | |
851 | || code_pt == MATCH_SCRATCH | |
852 | || code_pt == MATCH_PARALLEL) | |
853 | { | |
854 | /* Currently interface for these constructions isn't defined - | |
855 | probably they aren't needed in input template of define_subst at all. | |
856 | So, for now their usage in define_subst is forbidden. */ | |
857 | error_with_line (lineno, "%s cannot be used in define_subst", | |
858 | GET_RTX_NAME (code_pt)); | |
859 | } | |
860 | ||
861 | gcc_assert (code != MATCH_PAR_DUP | |
862 | && code_pt != MATCH_DUP | |
863 | && code_pt != MATCH_OP_DUP | |
864 | && code_pt != MATCH_SCRATCH | |
865 | && code_pt != MATCH_PARALLEL | |
866 | && code_pt != MATCH_OPERAND | |
867 | && code_pt != MATCH_OPERATOR); | |
868 | /* If PT is none of the handled above, then we match only expressions with | |
869 | the same code in X. */ | |
870 | if (code != code_pt) | |
871 | return false; | |
872 | ||
873 | fmt = GET_RTX_FORMAT (code_pt); | |
874 | len = GET_RTX_LENGTH (code_pt); | |
875 | ||
876 | for (i = 0; i < len; i++) | |
877 | { | |
878 | if (fmt[i] == '0') | |
879 | break; | |
880 | ||
881 | switch (fmt[i]) | |
882 | { | |
883 | case 'i': case 'w': case 's': | |
884 | continue; | |
885 | ||
886 | case 'e': case 'u': | |
887 | if (!subst_pattern_match (XEXP (x, i), XEXP (pt, i), lineno)) | |
888 | return false; | |
889 | break; | |
890 | case 'E': | |
891 | { | |
892 | if (XVECLEN (x, i) != XVECLEN (pt, i)) | |
893 | return false; | |
894 | for (j = 0; j < XVECLEN (pt, i); j++) | |
895 | if (!subst_pattern_match (XVECEXP (x, i, j), XVECEXP (pt, i, j), | |
896 | lineno)) | |
897 | return false; | |
898 | break; | |
899 | } | |
900 | default: | |
901 | gcc_unreachable (); | |
902 | } | |
903 | } | |
904 | ||
905 | return true; | |
906 | } | |
907 | ||
3262c1f5 RH |
908 | /* Examine the attribute "predicable"; discover its boolean values |
909 | and its default. */ | |
910 | ||
911 | static void | |
3d7aafde | 912 | identify_predicable_attribute (void) |
3262c1f5 RH |
913 | { |
914 | struct queue_elem *elem; | |
d6edb99e | 915 | char *p_true, *p_false; |
3262c1f5 | 916 | const char *value; |
3262c1f5 RH |
917 | |
918 | /* Look for the DEFINE_ATTR for `predicable', which must exist. */ | |
919 | for (elem = define_attr_queue; elem ; elem = elem->next) | |
920 | if (strcmp (XSTR (elem->data, 0), "predicable") == 0) | |
921 | goto found; | |
922 | ||
bb933490 RS |
923 | error_with_line (define_cond_exec_queue->lineno, |
924 | "attribute `predicable' not defined"); | |
3262c1f5 RH |
925 | return; |
926 | ||
927 | found: | |
928 | value = XSTR (elem->data, 1); | |
1dcd444b | 929 | p_false = xstrdup (value); |
d6edb99e ZW |
930 | p_true = strchr (p_false, ','); |
931 | if (p_true == NULL || strchr (++p_true, ',') != NULL) | |
3262c1f5 | 932 | { |
bb933490 | 933 | error_with_line (elem->lineno, "attribute `predicable' is not a boolean"); |
04695783 | 934 | free (p_false); |
3262c1f5 RH |
935 | return; |
936 | } | |
d6edb99e | 937 | p_true[-1] = '\0'; |
3262c1f5 | 938 | |
d6edb99e ZW |
939 | predicable_true = p_true; |
940 | predicable_false = p_false; | |
3262c1f5 RH |
941 | |
942 | switch (GET_CODE (XEXP (elem->data, 2))) | |
943 | { | |
944 | case CONST_STRING: | |
945 | value = XSTR (XEXP (elem->data, 2), 0); | |
946 | break; | |
947 | ||
948 | case CONST: | |
bb933490 | 949 | error_with_line (elem->lineno, "attribute `predicable' cannot be const"); |
04695783 | 950 | free (p_false); |
3262c1f5 RH |
951 | return; |
952 | ||
953 | default: | |
bb933490 RS |
954 | error_with_line (elem->lineno, |
955 | "attribute `predicable' must have a constant default"); | |
04695783 | 956 | free (p_false); |
3262c1f5 RH |
957 | return; |
958 | } | |
959 | ||
d6edb99e | 960 | if (strcmp (value, p_true) == 0) |
3262c1f5 | 961 | predicable_default = 1; |
d6edb99e | 962 | else if (strcmp (value, p_false) == 0) |
3262c1f5 RH |
963 | predicable_default = 0; |
964 | else | |
965 | { | |
bb933490 RS |
966 | error_with_line (elem->lineno, |
967 | "unknown value `%s' for `predicable' attribute", value); | |
04695783 | 968 | free (p_false); |
3262c1f5 RH |
969 | } |
970 | } | |
971 | ||
972 | /* Return the number of alternatives in constraint S. */ | |
973 | ||
974 | static int | |
3d7aafde | 975 | n_alternatives (const char *s) |
3262c1f5 RH |
976 | { |
977 | int n = 1; | |
978 | ||
979 | if (s) | |
980 | while (*s) | |
981 | n += (*s++ == ','); | |
982 | ||
983 | return n; | |
984 | } | |
985 | ||
477c104e MK |
986 | /* The routine scans rtl PATTERN, find match_operand in it and counts |
987 | number of alternatives. If PATTERN contains several match_operands | |
988 | with different number of alternatives, error is emitted, and the | |
989 | routine returns 0. If all match_operands in PATTERN have the same | |
990 | number of alternatives, it's stored in N_ALT, and the routine returns 1. | |
991 | Argument LINENO is used in when the error is emitted. */ | |
992 | static int | |
993 | get_alternatives_number (rtx pattern, int *n_alt, int lineno) | |
994 | { | |
995 | const char *fmt; | |
996 | enum rtx_code code; | |
997 | int i, j, len; | |
998 | ||
999 | if (!n_alt) | |
1000 | return 0; | |
1001 | ||
1002 | code = GET_CODE (pattern); | |
1003 | switch (code) | |
1004 | { | |
1005 | case MATCH_OPERAND: | |
1006 | i = n_alternatives (XSTR (pattern, 2)); | |
1007 | /* n_alternatives returns 1 if constraint string is empty - | |
1008 | here we fix it up. */ | |
1009 | if (!*(XSTR (pattern, 2))) | |
1010 | i = 0; | |
1011 | if (*n_alt <= 0) | |
1012 | *n_alt = i; | |
1013 | ||
1014 | else if (i && i != *n_alt) | |
1015 | { | |
1016 | error_with_line (lineno, | |
1017 | "wrong number of alternatives in operand %d", | |
1018 | XINT (pattern, 0)); | |
1019 | return 0; | |
1020 | } | |
1021 | ||
1022 | default: | |
1023 | break; | |
1024 | } | |
1025 | ||
1026 | fmt = GET_RTX_FORMAT (code); | |
1027 | len = GET_RTX_LENGTH (code); | |
1028 | for (i = 0; i < len; i++) | |
1029 | { | |
1030 | switch (fmt[i]) | |
1031 | { | |
1032 | case 'e': case 'u': | |
1033 | if (!get_alternatives_number (XEXP (pattern, i), n_alt, lineno)) | |
1034 | return 0; | |
1035 | break; | |
1036 | ||
1037 | case 'V': | |
1038 | if (XVEC (pattern, i) == NULL) | |
1039 | break; | |
1040 | ||
1041 | case 'E': | |
1042 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1043 | if (!get_alternatives_number (XVECEXP (pattern, i, j), | |
1044 | n_alt, lineno)) | |
1045 | return 0; | |
1046 | break; | |
1047 | ||
1048 | case 'i': case 'w': case '0': case 's': case 'S': case 'T': | |
1049 | break; | |
1050 | ||
1051 | default: | |
1052 | gcc_unreachable (); | |
1053 | } | |
1054 | } | |
1055 | return 1; | |
1056 | } | |
1057 | ||
3262c1f5 RH |
1058 | /* Determine how many alternatives there are in INSN, and how many |
1059 | operands. */ | |
1060 | ||
1061 | static void | |
3d7aafde | 1062 | collect_insn_data (rtx pattern, int *palt, int *pmax) |
3262c1f5 RH |
1063 | { |
1064 | const char *fmt; | |
1065 | enum rtx_code code; | |
1066 | int i, j, len; | |
1067 | ||
1068 | code = GET_CODE (pattern); | |
1069 | switch (code) | |
1070 | { | |
1071 | case MATCH_OPERAND: | |
892ecf92 RH |
1072 | i = n_alternatives (XSTR (pattern, 2)); |
1073 | *palt = (i > *palt ? i : *palt); | |
5d3cc252 | 1074 | /* Fall through. */ |
3262c1f5 RH |
1075 | |
1076 | case MATCH_OPERATOR: | |
1077 | case MATCH_SCRATCH: | |
1078 | case MATCH_PARALLEL: | |
3262c1f5 RH |
1079 | i = XINT (pattern, 0); |
1080 | if (i > *pmax) | |
1081 | *pmax = i; | |
1082 | break; | |
1083 | ||
1084 | default: | |
1085 | break; | |
1086 | } | |
1087 | ||
1088 | fmt = GET_RTX_FORMAT (code); | |
1089 | len = GET_RTX_LENGTH (code); | |
1090 | for (i = 0; i < len; i++) | |
1091 | { | |
1092 | switch (fmt[i]) | |
1093 | { | |
1094 | case 'e': case 'u': | |
1095 | collect_insn_data (XEXP (pattern, i), palt, pmax); | |
1096 | break; | |
1097 | ||
1098 | case 'V': | |
1099 | if (XVEC (pattern, i) == NULL) | |
1100 | break; | |
5d3cc252 | 1101 | /* Fall through. */ |
3262c1f5 RH |
1102 | case 'E': |
1103 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1104 | collect_insn_data (XVECEXP (pattern, i, j), palt, pmax); | |
1105 | break; | |
1106 | ||
3b324340 | 1107 | case 'i': case 'w': case '0': case 's': case 'S': case 'T': |
3262c1f5 RH |
1108 | break; |
1109 | ||
1110 | default: | |
b2d59f6f | 1111 | gcc_unreachable (); |
3262c1f5 RH |
1112 | } |
1113 | } | |
1114 | } | |
1115 | ||
1116 | static rtx | |
3d7aafde | 1117 | alter_predicate_for_insn (rtx pattern, int alt, int max_op, int lineno) |
3262c1f5 RH |
1118 | { |
1119 | const char *fmt; | |
1120 | enum rtx_code code; | |
1121 | int i, j, len; | |
1122 | ||
1123 | code = GET_CODE (pattern); | |
1124 | switch (code) | |
1125 | { | |
1126 | case MATCH_OPERAND: | |
1127 | { | |
1128 | const char *c = XSTR (pattern, 2); | |
1129 | ||
1130 | if (n_alternatives (c) != 1) | |
1131 | { | |
bb933490 RS |
1132 | error_with_line (lineno, "too many alternatives for operand %d", |
1133 | XINT (pattern, 0)); | |
3262c1f5 RH |
1134 | return NULL; |
1135 | } | |
1136 | ||
1137 | /* Replicate C as needed to fill out ALT alternatives. */ | |
1138 | if (c && *c && alt > 1) | |
1139 | { | |
1140 | size_t c_len = strlen (c); | |
1141 | size_t len = alt * (c_len + 1); | |
477c104e | 1142 | char *new_c = XNEWVEC (char, len); |
3262c1f5 RH |
1143 | |
1144 | memcpy (new_c, c, c_len); | |
1145 | for (i = 1; i < alt; ++i) | |
1146 | { | |
1147 | new_c[i * (c_len + 1) - 1] = ','; | |
1148 | memcpy (&new_c[i * (c_len + 1)], c, c_len); | |
1149 | } | |
1150 | new_c[len - 1] = '\0'; | |
1151 | XSTR (pattern, 2) = new_c; | |
1152 | } | |
1153 | } | |
5d3cc252 | 1154 | /* Fall through. */ |
3262c1f5 RH |
1155 | |
1156 | case MATCH_OPERATOR: | |
1157 | case MATCH_SCRATCH: | |
1158 | case MATCH_PARALLEL: | |
3262c1f5 RH |
1159 | XINT (pattern, 0) += max_op; |
1160 | break; | |
1161 | ||
1162 | default: | |
1163 | break; | |
1164 | } | |
1165 | ||
1166 | fmt = GET_RTX_FORMAT (code); | |
1167 | len = GET_RTX_LENGTH (code); | |
1168 | for (i = 0; i < len; i++) | |
1169 | { | |
1170 | rtx r; | |
1171 | ||
1172 | switch (fmt[i]) | |
1173 | { | |
1174 | case 'e': case 'u': | |
1175 | r = alter_predicate_for_insn (XEXP (pattern, i), alt, | |
1176 | max_op, lineno); | |
1177 | if (r == NULL) | |
1178 | return r; | |
1179 | break; | |
1180 | ||
1181 | case 'E': | |
1182 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1183 | { | |
1184 | r = alter_predicate_for_insn (XVECEXP (pattern, i, j), | |
1185 | alt, max_op, lineno); | |
1186 | if (r == NULL) | |
1187 | return r; | |
1188 | } | |
1189 | break; | |
1190 | ||
1191 | case 'i': case 'w': case '0': case 's': | |
1192 | break; | |
1193 | ||
1194 | default: | |
b2d59f6f | 1195 | gcc_unreachable (); |
3262c1f5 RH |
1196 | } |
1197 | } | |
1198 | ||
1199 | return pattern; | |
1200 | } | |
1201 | ||
477c104e MK |
1202 | /* Duplicate constraints in PATTERN. If pattern is from original |
1203 | rtl-template, we need to duplicate each alternative - for that we | |
1204 | need to use duplicate_each_alternative () as a functor ALTER. | |
1205 | If pattern is from output-pattern of define_subst, we need to | |
1206 | duplicate constraints in another way - with duplicate_alternatives (). | |
1207 | N_DUP is multiplication factor. */ | |
1208 | static rtx | |
1209 | alter_constraints (rtx pattern, int n_dup, constraints_handler_t alter) | |
1210 | { | |
1211 | const char *fmt; | |
1212 | enum rtx_code code; | |
1213 | int i, j, len; | |
1214 | ||
1215 | code = GET_CODE (pattern); | |
1216 | switch (code) | |
1217 | { | |
1218 | case MATCH_OPERAND: | |
1219 | XSTR (pattern, 2) = alter (XSTR (pattern, 2), n_dup); | |
1220 | break; | |
1221 | ||
1222 | default: | |
1223 | break; | |
1224 | } | |
1225 | ||
1226 | fmt = GET_RTX_FORMAT (code); | |
1227 | len = GET_RTX_LENGTH (code); | |
1228 | for (i = 0; i < len; i++) | |
1229 | { | |
1230 | rtx r; | |
1231 | ||
1232 | switch (fmt[i]) | |
1233 | { | |
1234 | case 'e': case 'u': | |
1235 | r = alter_constraints (XEXP (pattern, i), n_dup, alter); | |
1236 | if (r == NULL) | |
1237 | return r; | |
1238 | break; | |
1239 | ||
1240 | case 'E': | |
1241 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1242 | { | |
1243 | r = alter_constraints (XVECEXP (pattern, i, j), n_dup, alter); | |
1244 | if (r == NULL) | |
1245 | return r; | |
1246 | } | |
1247 | break; | |
1248 | ||
1249 | case 'i': case 'w': case '0': case 's': | |
1250 | break; | |
1251 | ||
1252 | default: | |
1253 | break; | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | return pattern; | |
1258 | } | |
1259 | ||
3262c1f5 | 1260 | static const char * |
3d7aafde AJ |
1261 | alter_test_for_insn (struct queue_elem *ce_elem, |
1262 | struct queue_elem *insn_elem) | |
3262c1f5 | 1263 | { |
7445392c RS |
1264 | return join_c_conditions (XSTR (ce_elem->data, 1), |
1265 | XSTR (insn_elem->data, 2)); | |
3262c1f5 RH |
1266 | } |
1267 | ||
0bddee8e BS |
1268 | /* Modify VAL, which is an attribute expression for the "enabled" attribute, |
1269 | to take "ce_enabled" into account. Return the new expression. */ | |
1270 | static rtx | |
1271 | modify_attr_enabled_ce (rtx val) | |
1272 | { | |
1273 | rtx eq_attr, str; | |
1274 | rtx ite; | |
1275 | eq_attr = rtx_alloc (EQ_ATTR); | |
1276 | ite = rtx_alloc (IF_THEN_ELSE); | |
1277 | str = rtx_alloc (CONST_STRING); | |
1278 | ||
1279 | XSTR (eq_attr, 0) = "ce_enabled"; | |
1280 | XSTR (eq_attr, 1) = "yes"; | |
1281 | XSTR (str, 0) = "no"; | |
1282 | XEXP (ite, 0) = eq_attr; | |
1283 | XEXP (ite, 1) = val; | |
1284 | XEXP (ite, 2) = str; | |
1285 | ||
1286 | return ite; | |
1287 | } | |
1288 | ||
1289 | /* Alter the attribute vector of INSN, which is a COND_EXEC variant created | |
1290 | from a define_insn pattern. We must modify the "predicable" attribute | |
1291 | to be named "ce_enabled", and also change any "enabled" attribute that's | |
1292 | present so that it takes ce_enabled into account. | |
1293 | We rely on the fact that INSN was created with copy_rtx, and modify data | |
1294 | in-place. */ | |
1295 | ||
1296 | static void | |
1297 | alter_attrs_for_insn (rtx insn) | |
1298 | { | |
1299 | static bool global_changes_made = false; | |
1300 | rtvec vec = XVEC (insn, 4); | |
1301 | rtvec new_vec; | |
1302 | rtx val, set; | |
1303 | int num_elem; | |
1304 | int predicable_idx = -1; | |
1305 | int enabled_idx = -1; | |
1306 | int i; | |
1307 | ||
1308 | if (! vec) | |
1309 | return; | |
1310 | ||
1311 | num_elem = GET_NUM_ELEM (vec); | |
1312 | for (i = num_elem - 1; i >= 0; --i) | |
1313 | { | |
1314 | rtx sub = RTVEC_ELT (vec, i); | |
1315 | switch (GET_CODE (sub)) | |
1316 | { | |
1317 | case SET_ATTR: | |
1318 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
1319 | { | |
1320 | predicable_idx = i; | |
1321 | XSTR (sub, 0) = "ce_enabled"; | |
1322 | } | |
1323 | else if (strcmp (XSTR (sub, 0), "enabled") == 0) | |
1324 | { | |
1325 | enabled_idx = i; | |
1326 | XSTR (sub, 0) = "nonce_enabled"; | |
1327 | } | |
1328 | break; | |
1329 | ||
1330 | case SET_ATTR_ALTERNATIVE: | |
1331 | if (strcmp (XSTR (sub, 0), "predicable") == 0) | |
1332 | /* We already give an error elsewhere. */ | |
1333 | return; | |
1334 | else if (strcmp (XSTR (sub, 0), "enabled") == 0) | |
1335 | { | |
1336 | enabled_idx = i; | |
1337 | XSTR (sub, 0) = "nonce_enabled"; | |
1338 | } | |
1339 | break; | |
1340 | ||
1341 | case SET: | |
1342 | if (GET_CODE (SET_DEST (sub)) != ATTR) | |
1343 | break; | |
1344 | if (strcmp (XSTR (SET_DEST (sub), 0), "predicable") == 0) | |
1345 | { | |
1346 | sub = SET_SRC (sub); | |
1347 | if (GET_CODE (sub) == CONST_STRING) | |
1348 | { | |
1349 | predicable_idx = i; | |
1350 | XSTR (sub, 0) = "ce_enabled"; | |
1351 | } | |
1352 | else | |
1353 | /* We already give an error elsewhere. */ | |
1354 | return; | |
1355 | break; | |
1356 | } | |
1357 | if (strcmp (XSTR (SET_DEST (sub), 0), "enabled") == 0) | |
1358 | { | |
1359 | enabled_idx = i; | |
1360 | XSTR (SET_DEST (sub), 0) = "nonce_enabled"; | |
1361 | } | |
1362 | break; | |
1363 | ||
1364 | default: | |
1365 | gcc_unreachable (); | |
1366 | } | |
1367 | } | |
1368 | if (predicable_idx == -1) | |
1369 | return; | |
1370 | ||
1371 | if (!global_changes_made) | |
1372 | { | |
1373 | struct queue_elem *elem; | |
477c104e | 1374 | |
0bddee8e BS |
1375 | global_changes_made = true; |
1376 | add_define_attr ("ce_enabled"); | |
1377 | add_define_attr ("nonce_enabled"); | |
1378 | ||
1379 | for (elem = define_attr_queue; elem ; elem = elem->next) | |
1380 | if (strcmp (XSTR (elem->data, 0), "enabled") == 0) | |
1381 | { | |
1382 | XEXP (elem->data, 2) | |
1383 | = modify_attr_enabled_ce (XEXP (elem->data, 2)); | |
1384 | } | |
1385 | } | |
1386 | if (enabled_idx == -1) | |
1387 | return; | |
1388 | ||
1389 | new_vec = rtvec_alloc (num_elem + 1); | |
1390 | for (i = 0; i < num_elem; i++) | |
1391 | RTVEC_ELT (new_vec, i) = RTVEC_ELT (vec, i); | |
1392 | val = rtx_alloc (IF_THEN_ELSE); | |
1393 | XEXP (val, 0) = rtx_alloc (EQ_ATTR); | |
1394 | XEXP (val, 1) = rtx_alloc (CONST_STRING); | |
1395 | XEXP (val, 2) = rtx_alloc (CONST_STRING); | |
1396 | XSTR (XEXP (val, 0), 0) = "nonce_enabled"; | |
1397 | XSTR (XEXP (val, 0), 1) = "yes"; | |
1398 | XSTR (XEXP (val, 1), 0) = "yes"; | |
1399 | XSTR (XEXP (val, 2), 0) = "no"; | |
1400 | set = rtx_alloc (SET); | |
1401 | SET_DEST (set) = rtx_alloc (ATTR); | |
1402 | XSTR (SET_DEST (set), 0) = "enabled"; | |
1403 | SET_SRC (set) = modify_attr_enabled_ce (val); | |
1404 | RTVEC_ELT (new_vec, i) = set; | |
1405 | XVEC (insn, 4) = new_vec; | |
1406 | } | |
1407 | ||
477c104e MK |
1408 | /* As number of constraints is changed after define_subst, we need to |
1409 | process attributes as well - we need to duplicate them the same way | |
1410 | that we duplicated constraints in original pattern | |
1411 | ELEM is a queue element, containing our rtl-template, | |
1412 | N_DUP - multiplication factor. */ | |
1413 | static void | |
1414 | alter_attrs_for_subst_insn (struct queue_elem * elem, int n_dup) | |
3262c1f5 | 1415 | { |
477c104e MK |
1416 | rtvec vec = XVEC (elem->data, 4); |
1417 | int num_elem; | |
1418 | int i; | |
1419 | ||
1420 | if (n_dup < 2 || ! vec) | |
1421 | return; | |
1422 | ||
1423 | num_elem = GET_NUM_ELEM (vec); | |
1424 | for (i = num_elem - 1; i >= 0; --i) | |
3262c1f5 | 1425 | { |
477c104e MK |
1426 | rtx sub = RTVEC_ELT (vec, i); |
1427 | switch (GET_CODE (sub)) | |
3262c1f5 | 1428 | { |
477c104e MK |
1429 | case SET_ATTR: |
1430 | if (strchr (XSTR (sub, 1), ',') != NULL) | |
1431 | XSTR (sub, 1) = duplicate_alternatives (XSTR (sub, 1), n_dup); | |
1432 | break; | |
1433 | ||
1434 | case SET_ATTR_ALTERNATIVE: | |
1435 | case SET: | |
1436 | error_with_line (elem->lineno, | |
1437 | "%s: `define_subst' does not support attributes " | |
1438 | "assigned by `set' and `set_attr_alternative'", | |
1439 | XSTR (elem->data, 0)); | |
1440 | return; | |
1441 | ||
1442 | default: | |
1443 | gcc_unreachable (); | |
1444 | } | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | /* Adjust all of the operand numbers in SRC to match the shift they'll | |
1449 | get from an operand displacement of DISP. Return a pointer after the | |
1450 | adjusted string. */ | |
1451 | ||
1452 | static char * | |
1453 | shift_output_template (char *dest, const char *src, int disp) | |
1454 | { | |
1455 | while (*src) | |
1456 | { | |
1457 | char c = *src++; | |
1458 | *dest++ = c; | |
1459 | if (c == '%') | |
1460 | { | |
1461 | c = *src++; | |
1462 | if (ISDIGIT ((unsigned char) c)) | |
1463 | c += disp; | |
1464 | else if (ISALPHA (c)) | |
1465 | { | |
53ed1a12 | 1466 | *dest++ = c; |
1ad463f4 | 1467 | c = *src++ + disp; |
3262c1f5 | 1468 | } |
53ed1a12 | 1469 | *dest++ = c; |
3262c1f5 RH |
1470 | } |
1471 | } | |
1472 | ||
53ed1a12 | 1473 | return dest; |
3262c1f5 RH |
1474 | } |
1475 | ||
1476 | static const char * | |
3d7aafde AJ |
1477 | alter_output_for_insn (struct queue_elem *ce_elem, |
1478 | struct queue_elem *insn_elem, | |
1479 | int alt, int max_op) | |
3262c1f5 RH |
1480 | { |
1481 | const char *ce_out, *insn_out; | |
53ed1a12 | 1482 | char *result, *p; |
3262c1f5 RH |
1483 | size_t len, ce_len, insn_len; |
1484 | ||
1485 | /* ??? Could coordinate with genoutput to not duplicate code here. */ | |
1486 | ||
1487 | ce_out = XSTR (ce_elem->data, 2); | |
66621f9e | 1488 | insn_out = XTMPL (insn_elem->data, 3); |
3262c1f5 RH |
1489 | if (!ce_out || *ce_out == '\0') |
1490 | return insn_out; | |
1491 | ||
1492 | ce_len = strlen (ce_out); | |
1493 | insn_len = strlen (insn_out); | |
1494 | ||
1495 | if (*insn_out == '*') | |
1496 | /* You must take care of the predicate yourself. */ | |
1497 | return insn_out; | |
1498 | ||
1499 | if (*insn_out == '@') | |
1500 | { | |
1501 | len = (ce_len + 1) * alt + insn_len + 1; | |
477c104e | 1502 | p = result = XNEWVEC (char, len); |
3262c1f5 RH |
1503 | |
1504 | do | |
1505 | { | |
1506 | do | |
1507 | *p++ = *insn_out++; | |
1508 | while (ISSPACE ((unsigned char) *insn_out)); | |
1509 | ||
1510 | if (*insn_out != '#') | |
1511 | { | |
1512 | p = shift_output_template (p, ce_out, max_op); | |
1513 | *p++ = ' '; | |
1514 | } | |
1515 | ||
1516 | do | |
1517 | *p++ = *insn_out++; | |
1518 | while (*insn_out && *insn_out != '\n'); | |
1519 | } | |
1520 | while (*insn_out); | |
1521 | *p = '\0'; | |
1522 | } | |
1523 | else | |
1524 | { | |
1525 | len = ce_len + 1 + insn_len + 1; | |
53ed1a12 | 1526 | result = XNEWVEC (char, len); |
3262c1f5 | 1527 | |
53ed1a12 | 1528 | p = shift_output_template (result, ce_out, max_op); |
3262c1f5 RH |
1529 | *p++ = ' '; |
1530 | memcpy (p, insn_out, insn_len + 1); | |
1531 | } | |
1532 | ||
53ed1a12 | 1533 | return result; |
3262c1f5 RH |
1534 | } |
1535 | ||
477c104e MK |
1536 | /* From string STR "a,b,c" produce "a,b,c,a,b,c,a,b,c", i.e. original |
1537 | string, duplicated N_DUP times. */ | |
1538 | ||
1539 | static const char * | |
1540 | duplicate_alternatives (const char * str, int n_dup) | |
1541 | { | |
1542 | int i, len, new_len; | |
1543 | char *result, *sp; | |
1544 | const char *cp; | |
1545 | ||
1546 | if (n_dup < 2) | |
1547 | return str; | |
1548 | ||
1549 | while (ISSPACE (*str)) | |
1550 | str++; | |
1551 | ||
1552 | if (*str == '\0') | |
1553 | return str; | |
1554 | ||
1555 | cp = str; | |
1556 | len = strlen (str); | |
1557 | new_len = (len + 1) * n_dup; | |
1558 | ||
1559 | sp = result = XNEWVEC (char, new_len); | |
1560 | ||
1561 | /* Global modifier characters mustn't be duplicated: skip if found. */ | |
1562 | if (*cp == '=' || *cp == '+' || *cp == '%') | |
1563 | { | |
1564 | *sp++ = *cp++; | |
1565 | len--; | |
1566 | } | |
1567 | ||
1568 | /* Copy original constraints N_DUP times. */ | |
1569 | for (i = 0; i < n_dup; i++, sp += len+1) | |
1570 | { | |
1571 | memcpy (sp, cp, len); | |
1572 | *(sp+len) = (i == n_dup - 1) ? '\0' : ','; | |
1573 | } | |
1574 | ||
1575 | return result; | |
1576 | } | |
1577 | ||
1578 | /* From string STR "a,b,c" produce "a,a,a,b,b,b,c,c,c", i.e. string where | |
1579 | each alternative from the original string is duplicated N_DUP times. */ | |
1580 | static const char * | |
1581 | duplicate_each_alternative (const char * str, int n_dup) | |
1582 | { | |
1583 | int i, len, new_len; | |
1584 | char *result, *sp, *ep, *cp; | |
1585 | ||
1586 | if (n_dup < 2) | |
1587 | return str; | |
1588 | ||
1589 | while (ISSPACE (*str)) | |
1590 | str++; | |
1591 | ||
1592 | if (*str == '\0') | |
1593 | return str; | |
1594 | ||
1595 | cp = xstrdup (str); | |
1596 | ||
1597 | new_len = (strlen (cp) + 1) * n_dup; | |
1598 | ||
1599 | sp = result = XNEWVEC (char, new_len); | |
1600 | ||
1601 | /* Global modifier characters mustn't be duplicated: skip if found. */ | |
1602 | if (*cp == '=' || *cp == '+' || *cp == '%') | |
1603 | *sp++ = *cp++; | |
1604 | ||
1605 | do | |
1606 | { | |
1607 | if ((ep = strchr (cp, ',')) != NULL) | |
1608 | *ep++ = '\0'; | |
1609 | len = strlen (cp); | |
1610 | ||
1611 | /* Copy a constraint N_DUP times. */ | |
1612 | for (i = 0; i < n_dup; i++, sp += len + 1) | |
1613 | { | |
1614 | memcpy (sp, cp, len); | |
1615 | *(sp+len) = (ep == NULL && i == n_dup - 1) ? '\0' : ','; | |
1616 | } | |
1617 | ||
1618 | cp = ep; | |
1619 | } | |
1620 | while (cp != NULL); | |
1621 | ||
1622 | return result; | |
1623 | } | |
1624 | ||
1625 | /* Alter the output of INSN whose pattern was modified by | |
1626 | DEFINE_SUBST. We must replicate output strings according | |
1627 | to the new number of alternatives ALT in substituted pattern. | |
1628 | If ALT equals 1, output has one alternative or defined by C | |
1629 | code, then output is returned without any changes. */ | |
1630 | ||
1631 | static const char * | |
1632 | alter_output_for_subst_insn (rtx insn, int alt) | |
1633 | { | |
1634 | const char *insn_out, *sp ; | |
1635 | char *old_out, *new_out, *cp; | |
1636 | int i, j, new_len; | |
1637 | ||
1638 | insn_out = XTMPL (insn, 3); | |
1639 | ||
1640 | if (alt < 2 || *insn_out == '*' || *insn_out != '@') | |
1641 | return insn_out; | |
1642 | ||
1643 | old_out = XNEWVEC (char, strlen (insn_out)), | |
1644 | sp = insn_out; | |
1645 | ||
1646 | while (ISSPACE (*sp) || *sp == '@') | |
1647 | sp++; | |
1648 | ||
1649 | for (i = 0; *sp;) | |
1650 | old_out[i++] = *sp++; | |
1651 | ||
1652 | new_len = alt * (i + 1) + 1; | |
1653 | ||
1654 | new_out = XNEWVEC (char, new_len); | |
1655 | new_out[0] = '@'; | |
1656 | ||
1657 | for (j = 0, cp = new_out + 1; j < alt; j++, cp += i + 1) | |
1658 | { | |
1659 | memcpy (cp, old_out, i); | |
1660 | *(cp+i) = (j == alt - 1) ? '\0' : '\n'; | |
1661 | } | |
1662 | ||
1663 | return new_out; | |
1664 | } | |
1665 | ||
3262c1f5 RH |
1666 | /* Replicate insns as appropriate for the given DEFINE_COND_EXEC. */ |
1667 | ||
1668 | static void | |
3d7aafde | 1669 | process_one_cond_exec (struct queue_elem *ce_elem) |
3262c1f5 RH |
1670 | { |
1671 | struct queue_elem *insn_elem; | |
1672 | for (insn_elem = define_insn_queue; insn_elem ; insn_elem = insn_elem->next) | |
1673 | { | |
1674 | int alternatives, max_operand; | |
a406f566 | 1675 | rtx pred, insn, pattern, split; |
2f6c5b27 | 1676 | char *new_name; |
a406f566 | 1677 | int i; |
3262c1f5 RH |
1678 | |
1679 | if (! is_predicable (insn_elem)) | |
1680 | continue; | |
1681 | ||
1682 | alternatives = 1; | |
1683 | max_operand = -1; | |
1684 | collect_insn_data (insn_elem->data, &alternatives, &max_operand); | |
1685 | max_operand += 1; | |
1686 | ||
1687 | if (XVECLEN (ce_elem->data, 0) != 1) | |
1688 | { | |
bb933490 | 1689 | error_with_line (ce_elem->lineno, "too many patterns in predicate"); |
3262c1f5 RH |
1690 | return; |
1691 | } | |
1692 | ||
1693 | pred = copy_rtx (XVECEXP (ce_elem->data, 0, 0)); | |
1694 | pred = alter_predicate_for_insn (pred, alternatives, max_operand, | |
1695 | ce_elem->lineno); | |
1696 | if (pred == NULL) | |
1697 | return; | |
1698 | ||
1699 | /* Construct a new pattern for the new insn. */ | |
1700 | insn = copy_rtx (insn_elem->data); | |
2f6c5b27 SB |
1701 | new_name = XNEWVAR (char, strlen XSTR (insn_elem->data, 0) + 4); |
1702 | sprintf (new_name, "*p %s", XSTR (insn_elem->data, 0)); | |
1703 | XSTR (insn, 0) = new_name; | |
3262c1f5 RH |
1704 | pattern = rtx_alloc (COND_EXEC); |
1705 | XEXP (pattern, 0) = pred; | |
1706 | if (XVECLEN (insn, 1) == 1) | |
1707 | { | |
1708 | XEXP (pattern, 1) = XVECEXP (insn, 1, 0); | |
1709 | XVECEXP (insn, 1, 0) = pattern; | |
1710 | PUT_NUM_ELEM (XVEC (insn, 1), 1); | |
1711 | } | |
1712 | else | |
1713 | { | |
1714 | XEXP (pattern, 1) = rtx_alloc (PARALLEL); | |
1715 | XVEC (XEXP (pattern, 1), 0) = XVEC (insn, 1); | |
1716 | XVEC (insn, 1) = rtvec_alloc (1); | |
1717 | XVECEXP (insn, 1, 0) = pattern; | |
1718 | } | |
1719 | ||
1720 | XSTR (insn, 2) = alter_test_for_insn (ce_elem, insn_elem); | |
66621f9e | 1721 | XTMPL (insn, 3) = alter_output_for_insn (ce_elem, insn_elem, |
3262c1f5 | 1722 | alternatives, max_operand); |
0bddee8e | 1723 | alter_attrs_for_insn (insn); |
3262c1f5 RH |
1724 | |
1725 | /* Put the new pattern on the `other' list so that it | |
1726 | (a) is not reprocessed by other define_cond_exec patterns | |
1727 | (b) appears after all normal define_insn patterns. | |
1728 | ||
1729 | ??? B is debatable. If one has normal insns that match | |
1730 | cond_exec patterns, they will be preferred over these | |
1731 | generated patterns. Whether this matters in practice, or if | |
1732 | it's a good thing, or whether we should thread these new | |
1733 | patterns into the define_insn chain just after their generator | |
1734 | is something we'll have to experiment with. */ | |
1735 | ||
821e35ba RH |
1736 | queue_pattern (insn, &other_tail, insn_elem->filename, |
1737 | insn_elem->lineno); | |
a406f566 MM |
1738 | |
1739 | if (!insn_elem->split) | |
1740 | continue; | |
1741 | ||
1742 | /* If the original insn came from a define_insn_and_split, | |
9cf737f8 | 1743 | generate a new split to handle the predicated insn. */ |
a406f566 MM |
1744 | split = copy_rtx (insn_elem->split->data); |
1745 | /* Predicate the pattern matched by the split. */ | |
1746 | pattern = rtx_alloc (COND_EXEC); | |
1747 | XEXP (pattern, 0) = pred; | |
1748 | if (XVECLEN (split, 0) == 1) | |
1749 | { | |
1750 | XEXP (pattern, 1) = XVECEXP (split, 0, 0); | |
1751 | XVECEXP (split, 0, 0) = pattern; | |
1752 | PUT_NUM_ELEM (XVEC (split, 0), 1); | |
1753 | } | |
1754 | else | |
1755 | { | |
1756 | XEXP (pattern, 1) = rtx_alloc (PARALLEL); | |
1757 | XVEC (XEXP (pattern, 1), 0) = XVEC (split, 0); | |
1758 | XVEC (split, 0) = rtvec_alloc (1); | |
1759 | XVECEXP (split, 0, 0) = pattern; | |
1760 | } | |
1761 | /* Predicate all of the insns generated by the split. */ | |
1762 | for (i = 0; i < XVECLEN (split, 2); i++) | |
1763 | { | |
1764 | pattern = rtx_alloc (COND_EXEC); | |
1765 | XEXP (pattern, 0) = pred; | |
1766 | XEXP (pattern, 1) = XVECEXP (split, 2, i); | |
1767 | XVECEXP (split, 2, i) = pattern; | |
1768 | } | |
1769 | /* Add the new split to the queue. */ | |
d2a3ce4e | 1770 | queue_pattern (split, &other_tail, read_md_filename, |
a406f566 | 1771 | insn_elem->split->lineno); |
3262c1f5 RH |
1772 | } |
1773 | } | |
1774 | ||
477c104e MK |
1775 | /* Try to apply define_substs to the given ELEM. |
1776 | Only define_substs, specified via attributes would be applied. | |
1777 | If attribute, requiring define_subst, is set, but no define_subst | |
1778 | was applied, ELEM would be deleted. */ | |
1779 | ||
1780 | static void | |
1781 | process_substs_on_one_elem (struct queue_elem *elem, | |
1782 | struct queue_elem *queue) | |
1783 | { | |
1784 | struct queue_elem *subst_elem; | |
1785 | int i, j, patterns_match; | |
1786 | ||
1787 | for (subst_elem = define_subst_queue; | |
1788 | subst_elem; subst_elem = subst_elem->next) | |
1789 | { | |
1790 | int alternatives, alternatives_subst; | |
1791 | rtx subst_pattern; | |
1792 | rtvec subst_pattern_vec; | |
1793 | ||
1794 | if (!has_subst_attribute (elem, subst_elem)) | |
1795 | continue; | |
1796 | ||
1797 | /* Compare original rtl-pattern from define_insn with input | |
1798 | pattern from define_subst. | |
1799 | Also, check if numbers of alternatives are the same in all | |
1800 | match_operands. */ | |
1801 | if (XVECLEN (elem->data, 1) != XVECLEN (subst_elem->data, 1)) | |
1802 | continue; | |
1803 | patterns_match = 1; | |
1804 | alternatives = -1; | |
1805 | alternatives_subst = -1; | |
1806 | for (j = 0; j < XVECLEN (elem->data, 1); j++) | |
1807 | { | |
1808 | if (!subst_pattern_match (XVECEXP (elem->data, 1, j), | |
1809 | XVECEXP (subst_elem->data, 1, j), | |
1810 | subst_elem->lineno)) | |
1811 | { | |
1812 | patterns_match = 0; | |
1813 | break; | |
1814 | } | |
1815 | ||
1816 | if (!get_alternatives_number (XVECEXP (elem->data, 1, j), | |
1817 | &alternatives, subst_elem->lineno)) | |
1818 | { | |
1819 | patterns_match = 0; | |
1820 | break; | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | /* Check if numbers of alternatives are the same in all | |
1825 | match_operands in output template of define_subst. */ | |
1826 | for (j = 0; j < XVECLEN (subst_elem->data, 3); j++) | |
1827 | { | |
1828 | if (!get_alternatives_number (XVECEXP (subst_elem->data, 3, j), | |
1829 | &alternatives_subst, | |
1830 | subst_elem->lineno)) | |
1831 | { | |
1832 | patterns_match = 0; | |
1833 | break; | |
1834 | } | |
1835 | } | |
1836 | ||
1837 | if (!patterns_match) | |
1838 | continue; | |
1839 | ||
1840 | /* Clear array in which we save occupied indexes of operands. */ | |
1841 | memset (used_operands_numbers, 0, sizeof (used_operands_numbers)); | |
1842 | ||
1843 | /* Create a pattern, based on the output one from define_subst. */ | |
1844 | subst_pattern_vec = rtvec_alloc (XVECLEN (subst_elem->data, 3)); | |
1845 | for (j = 0; j < XVECLEN (subst_elem->data, 3); j++) | |
1846 | { | |
1847 | subst_pattern = copy_rtx (XVECEXP (subst_elem->data, 3, j)); | |
1848 | ||
1849 | /* Duplicate constraints in substitute-pattern. */ | |
1850 | subst_pattern = alter_constraints (subst_pattern, alternatives, | |
1851 | duplicate_each_alternative); | |
1852 | ||
1853 | subst_pattern = adjust_operands_numbers (subst_pattern); | |
1854 | ||
1855 | /* Substitute match_dup and match_op_dup in the new pattern and | |
1856 | duplicate constraints. */ | |
1857 | subst_pattern = subst_dup (subst_pattern, alternatives, | |
1858 | alternatives_subst); | |
1859 | ||
1860 | replace_duplicating_operands_in_pattern (subst_pattern); | |
1861 | ||
1862 | /* We don't need any constraints in DEFINE_EXPAND. */ | |
1863 | if (GET_CODE (elem->data) == DEFINE_EXPAND) | |
1864 | remove_constraints (subst_pattern); | |
1865 | ||
1866 | RTVEC_ELT (subst_pattern_vec, j) = subst_pattern; | |
1867 | } | |
1868 | XVEC (elem->data, 1) = subst_pattern_vec; | |
1869 | ||
1870 | for (i = 0; i < MAX_OPERANDS; i++) | |
1871 | match_operand_entries_in_pattern[i] = NULL; | |
1872 | ||
1873 | if (GET_CODE (elem->data) == DEFINE_INSN) | |
1874 | { | |
1875 | XTMPL (elem->data, 3) = | |
1876 | alter_output_for_subst_insn (elem->data, alternatives_subst); | |
1877 | alter_attrs_for_subst_insn (elem, alternatives_subst); | |
1878 | } | |
1879 | ||
1880 | /* Recalculate condition, joining conditions from original and | |
1881 | DEFINE_SUBST input patterns. */ | |
1882 | XSTR (elem->data, 2) = join_c_conditions (XSTR (subst_elem->data, 2), | |
1883 | XSTR (elem->data, 2)); | |
1884 | /* Mark that subst was applied by changing attribute from "yes" | |
1885 | to "no". */ | |
1886 | change_subst_attribute (elem, subst_elem, subst_false); | |
1887 | } | |
1888 | ||
1889 | /* If ELEM contains a subst attribute with value "yes", then we | |
1890 | expected that a subst would be applied, but it wasn't - so, | |
1891 | we need to remove that elementto avoid duplicating. */ | |
1892 | for (subst_elem = define_subst_queue; | |
1893 | subst_elem; subst_elem = subst_elem->next) | |
1894 | { | |
1895 | if (has_subst_attribute (elem, subst_elem)) | |
1896 | { | |
1897 | remove_from_queue (elem, &queue); | |
1898 | return; | |
1899 | } | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | /* This is a subroutine of mark_operands_used_in_match_dup. | |
1904 | This routine is marks all MATCH_OPERANDs inside PATTERN as occupied. */ | |
1905 | static void | |
1906 | mark_operands_from_match_dup (rtx pattern) | |
1907 | { | |
1908 | const char *fmt; | |
1909 | int i, j, len, opno; | |
1910 | ||
1911 | if (GET_CODE (pattern) == MATCH_OPERAND | |
1912 | || GET_CODE (pattern) == MATCH_OPERATOR | |
1913 | || GET_CODE (pattern) == MATCH_PARALLEL) | |
1914 | { | |
1915 | opno = XINT (pattern, 0); | |
1916 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
1917 | used_operands_numbers [opno] = 1; | |
1918 | } | |
1919 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
1920 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
1921 | for (i = 0; i < len; i++) | |
1922 | { | |
1923 | switch (fmt[i]) | |
1924 | { | |
1925 | case 'e': case 'u': | |
1926 | mark_operands_from_match_dup (XEXP (pattern, i)); | |
1927 | break; | |
1928 | case 'E': | |
1929 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1930 | mark_operands_from_match_dup (XVECEXP (pattern, i, j)); | |
1931 | break; | |
1932 | } | |
1933 | } | |
1934 | } | |
1935 | ||
1936 | /* This is a subroutine of adjust_operands_numbers. | |
1937 | It goes through all expressions in PATTERN and when MATCH_DUP is | |
1938 | met, all MATCH_OPERANDs inside it is marked as occupied. The | |
1939 | process of marking is done by routin mark_operands_from_match_dup. */ | |
1940 | static void | |
1941 | mark_operands_used_in_match_dup (rtx pattern) | |
1942 | { | |
1943 | const char *fmt; | |
1944 | int i, j, len, opno; | |
1945 | ||
1946 | if (GET_CODE (pattern) == MATCH_DUP) | |
1947 | { | |
1948 | opno = XINT (pattern, 0); | |
1949 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
1950 | mark_operands_from_match_dup (operand_data[opno]); | |
1951 | return; | |
1952 | } | |
1953 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
1954 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
1955 | for (i = 0; i < len; i++) | |
1956 | { | |
1957 | switch (fmt[i]) | |
1958 | { | |
1959 | case 'e': case 'u': | |
1960 | mark_operands_used_in_match_dup (XEXP (pattern, i)); | |
1961 | break; | |
1962 | case 'E': | |
1963 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
1964 | mark_operands_used_in_match_dup (XVECEXP (pattern, i, j)); | |
1965 | break; | |
1966 | } | |
1967 | } | |
1968 | } | |
1969 | ||
1970 | /* This is subroutine of renumerate_operands_in_pattern. | |
1971 | It finds first not-occupied operand-index. */ | |
1972 | static int | |
1973 | find_first_unused_number_of_operand () | |
1974 | { | |
1975 | int i; | |
1976 | for (i = 0; i < MAX_OPERANDS; i++) | |
1977 | if (!used_operands_numbers[i]) | |
1978 | return i; | |
1979 | return MAX_OPERANDS; | |
1980 | } | |
1981 | ||
1982 | /* This is subroutine of adjust_operands_numbers. | |
1983 | It visits all expressions in PATTERN and assigns not-occupied | |
1984 | operand indexes to MATCH_OPERANDs and MATCH_OPERATORs of this | |
1985 | PATTERN. */ | |
1986 | static void | |
1987 | renumerate_operands_in_pattern (rtx pattern) | |
1988 | { | |
1989 | const char *fmt; | |
1990 | enum rtx_code code; | |
1991 | int i, j, len, new_opno; | |
1992 | code = GET_CODE (pattern); | |
1993 | ||
1994 | if (code == MATCH_OPERAND | |
1995 | || code == MATCH_OPERATOR) | |
1996 | { | |
1997 | new_opno = find_first_unused_number_of_operand (); | |
1998 | gcc_assert (new_opno >= 0 && new_opno < MAX_OPERANDS); | |
1999 | XINT (pattern, 0) = new_opno; | |
2000 | used_operands_numbers [new_opno] = 1; | |
2001 | } | |
2002 | ||
2003 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
2004 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
2005 | for (i = 0; i < len; i++) | |
2006 | { | |
2007 | switch (fmt[i]) | |
2008 | { | |
2009 | case 'e': case 'u': | |
2010 | renumerate_operands_in_pattern (XEXP (pattern, i)); | |
2011 | break; | |
2012 | case 'E': | |
2013 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
2014 | renumerate_operands_in_pattern (XVECEXP (pattern, i, j)); | |
2015 | break; | |
2016 | } | |
2017 | } | |
2018 | } | |
2019 | ||
2020 | /* If output pattern of define_subst contains MATCH_DUP, then this | |
2021 | expression would be replaced with the pattern, matched with | |
2022 | MATCH_OPERAND from input pattern. This pattern could contain any | |
2023 | number of MATCH_OPERANDs, MATCH_OPERATORs etc., so it's possible | |
2024 | that a MATCH_OPERAND from output_pattern (if any) would have the | |
2025 | same number, as MATCH_OPERAND from copied pattern. To avoid such | |
2026 | indexes overlapping, we assign new indexes to MATCH_OPERANDs, | |
2027 | laying in the output pattern outside of MATCH_DUPs. */ | |
2028 | static rtx | |
2029 | adjust_operands_numbers (rtx pattern) | |
2030 | { | |
2031 | mark_operands_used_in_match_dup (pattern); | |
2032 | ||
2033 | renumerate_operands_in_pattern (pattern); | |
2034 | ||
2035 | return pattern; | |
2036 | } | |
2037 | ||
2038 | /* Generate RTL expression | |
2039 | (match_dup OPNO) | |
2040 | */ | |
2041 | static rtx | |
2042 | generate_match_dup (int opno) | |
2043 | { | |
2044 | rtx return_rtx = rtx_alloc (MATCH_DUP); | |
2045 | PUT_CODE (return_rtx, MATCH_DUP); | |
2046 | XINT (return_rtx, 0) = opno; | |
2047 | return return_rtx; | |
2048 | } | |
2049 | ||
2050 | /* This routine checks all match_operands in PATTERN and if some of | |
2051 | have the same index, it replaces all of them except the first one to | |
2052 | match_dup. | |
2053 | Usually, match_operands with the same indexes are forbidden, but | |
2054 | after define_subst copy an RTL-expression from original template, | |
2055 | indexes of existed and just-copied match_operands could coincide. | |
2056 | To fix it, we replace one of them with match_dup. */ | |
2057 | static rtx | |
2058 | replace_duplicating_operands_in_pattern (rtx pattern) | |
2059 | { | |
2060 | const char *fmt; | |
2061 | int i, j, len, opno; | |
2062 | rtx mdup; | |
2063 | ||
2064 | if (GET_CODE (pattern) == MATCH_OPERAND) | |
2065 | { | |
2066 | opno = XINT (pattern, 0); | |
2067 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
2068 | if (match_operand_entries_in_pattern[opno] == NULL) | |
2069 | { | |
2070 | match_operand_entries_in_pattern[opno] = pattern; | |
2071 | return NULL; | |
2072 | } | |
2073 | else | |
2074 | { | |
2075 | /* Compare predicates before replacing with match_dup. */ | |
2076 | if (strcmp (XSTR (pattern, 1), | |
2077 | XSTR (match_operand_entries_in_pattern[opno], 1))) | |
2078 | { | |
2079 | error ("duplicated match_operands with different predicates were" | |
2080 | " found."); | |
2081 | return NULL; | |
2082 | } | |
2083 | return generate_match_dup (opno); | |
2084 | } | |
2085 | } | |
2086 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
2087 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
2088 | for (i = 0; i < len; i++) | |
2089 | { | |
2090 | switch (fmt[i]) | |
2091 | { | |
2092 | case 'e': case 'u': | |
2093 | mdup = replace_duplicating_operands_in_pattern (XEXP (pattern, i)); | |
2094 | if (mdup) | |
2095 | XEXP (pattern, i) = mdup; | |
2096 | break; | |
2097 | case 'E': | |
2098 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
2099 | { | |
2100 | mdup = | |
2101 | replace_duplicating_operands_in_pattern (XVECEXP | |
2102 | (pattern, i, j)); | |
2103 | if (mdup) | |
2104 | XVECEXP (pattern, i, j) = mdup; | |
2105 | } | |
2106 | break; | |
2107 | } | |
2108 | } | |
2109 | return NULL; | |
2110 | } | |
2111 | ||
2112 | /* The routine modifies given input PATTERN of define_subst, replacing | |
2113 | MATCH_DUP and MATCH_OP_DUP with operands from define_insn original | |
2114 | pattern, whose operands are stored in OPERAND_DATA array. | |
2115 | It also duplicates constraints in operands - constraints from | |
2116 | define_insn operands are duplicated N_SUBST_ALT times, constraints | |
2117 | from define_subst operands are duplicated N_ALT times. | |
2118 | After the duplication, returned output rtl-pattern contains every | |
2119 | combination of input constraints Vs constraints from define_subst | |
2120 | output. */ | |
2121 | static rtx | |
2122 | subst_dup (rtx pattern, int n_alt, int n_subst_alt) | |
2123 | { | |
2124 | const char *fmt; | |
2125 | enum rtx_code code; | |
2126 | int i, j, len, opno; | |
2127 | ||
2128 | code = GET_CODE (pattern); | |
2129 | switch (code) | |
2130 | { | |
2131 | case MATCH_DUP: | |
2132 | case MATCH_OP_DUP: | |
2133 | opno = XINT (pattern, 0); | |
2134 | ||
2135 | gcc_assert (opno >= 0 && opno < MAX_OPERANDS); | |
2136 | ||
2137 | if (operand_data[opno]) | |
2138 | { | |
2139 | pattern = copy_rtx (operand_data[opno]); | |
2140 | ||
2141 | /* Duplicate constraints. */ | |
2142 | pattern = alter_constraints (pattern, n_subst_alt, | |
2143 | duplicate_alternatives); | |
2144 | } | |
2145 | break; | |
2146 | ||
2147 | default: | |
2148 | break; | |
2149 | } | |
2150 | ||
2151 | fmt = GET_RTX_FORMAT (GET_CODE (pattern)); | |
2152 | len = GET_RTX_LENGTH (GET_CODE (pattern)); | |
2153 | for (i = 0; i < len; i++) | |
2154 | { | |
2155 | switch (fmt[i]) | |
2156 | { | |
2157 | case 'e': case 'u': | |
2158 | if (code != MATCH_DUP && code != MATCH_OP_DUP) | |
2159 | XEXP (pattern, i) = subst_dup (XEXP (pattern, i), | |
2160 | n_alt, n_subst_alt); | |
2161 | break; | |
2162 | case 'V': | |
2163 | if (XVEC (pattern, i) == NULL) | |
2164 | break; | |
2165 | case 'E': | |
2166 | for (j = XVECLEN (pattern, i) - 1; j >= 0; --j) | |
2167 | if (code != MATCH_DUP && code != MATCH_OP_DUP) | |
2168 | XVECEXP (pattern, i, j) = subst_dup (XVECEXP (pattern, i, j), | |
2169 | n_alt, n_subst_alt); | |
2170 | break; | |
2171 | ||
2172 | case 'i': case 'w': case '0': case 's': case 'S': case 'T': | |
2173 | break; | |
2174 | ||
2175 | default: | |
2176 | gcc_unreachable (); | |
2177 | } | |
2178 | } | |
2179 | return pattern; | |
2180 | } | |
2181 | ||
3262c1f5 RH |
2182 | /* If we have any DEFINE_COND_EXEC patterns, expand the DEFINE_INSN |
2183 | patterns appropriately. */ | |
2184 | ||
2185 | static void | |
3d7aafde | 2186 | process_define_cond_exec (void) |
3262c1f5 RH |
2187 | { |
2188 | struct queue_elem *elem; | |
2189 | ||
2190 | identify_predicable_attribute (); | |
bb933490 | 2191 | if (have_error) |
3262c1f5 RH |
2192 | return; |
2193 | ||
2194 | for (elem = define_cond_exec_queue; elem ; elem = elem->next) | |
2195 | process_one_cond_exec (elem); | |
2196 | } | |
477c104e MK |
2197 | |
2198 | /* If we have any DEFINE_SUBST patterns, expand DEFINE_INSN and | |
2199 | DEFINE_EXPAND patterns appropriately. */ | |
2200 | ||
2201 | static void | |
2202 | process_define_subst (void) | |
2203 | { | |
2204 | struct queue_elem *elem, *elem_attr; | |
2205 | ||
2206 | /* Check if each define_subst has corresponding define_subst_attr. */ | |
2207 | for (elem = define_subst_queue; elem ; elem = elem->next) | |
2208 | { | |
2209 | for (elem_attr = define_subst_attr_queue; | |
2210 | elem_attr; | |
2211 | elem_attr = elem_attr->next) | |
2212 | if (strcmp (XSTR (elem->data, 0), XSTR (elem_attr->data, 1)) == 0) | |
2213 | goto found; | |
2214 | ||
2215 | error_with_line (elem->lineno, | |
2216 | "%s: `define_subst' must have at least one " | |
2217 | "corresponding `define_subst_attr'", | |
2218 | XSTR (elem->data, 0)); | |
2219 | return; | |
2220 | found: | |
2221 | continue; | |
2222 | } | |
2223 | ||
2224 | for (elem = define_insn_queue; elem ; elem = elem->next) | |
2225 | process_substs_on_one_elem (elem, define_insn_queue); | |
2226 | for (elem = other_queue; elem ; elem = elem->next) | |
2227 | { | |
2228 | if (GET_CODE (elem->data) != DEFINE_EXPAND) | |
2229 | continue; | |
2230 | process_substs_on_one_elem (elem, other_queue); | |
2231 | } | |
2232 | } | |
600ab3fc RS |
2233 | \f |
2234 | /* A read_md_files callback for reading an rtx. */ | |
04d8aa70 | 2235 | |
600ab3fc RS |
2236 | static void |
2237 | rtx_handle_directive (int lineno, const char *rtx_name) | |
04d8aa70 | 2238 | { |
600ab3fc | 2239 | rtx queue, x; |
04d8aa70 | 2240 | |
600ab3fc RS |
2241 | if (read_rtx (rtx_name, &queue)) |
2242 | for (x = queue; x; x = XEXP (x, 1)) | |
2243 | process_rtx (XEXP (x, 0), lineno); | |
04d8aa70 AM |
2244 | } |
2245 | ||
64aad689 AK |
2246 | /* Comparison function for the mnemonic hash table. */ |
2247 | ||
2248 | static int | |
2249 | htab_eq_string (const void *s1, const void *s2) | |
2250 | { | |
2251 | return strcmp ((const char*)s1, (const char*)s2) == 0; | |
2252 | } | |
2253 | ||
2254 | /* Add mnemonic STR with length LEN to the mnemonic hash table | |
2255 | MNEMONIC_HTAB. A trailing zero end character is appendend to STR | |
2256 | and a permanent heap copy of STR is created. */ | |
2257 | ||
2258 | static void | |
2259 | add_mnemonic_string (htab_t mnemonic_htab, const char *str, int len) | |
2260 | { | |
2261 | char *new_str; | |
2262 | void **slot; | |
2263 | char *str_zero = (char*)alloca (len + 1); | |
2264 | ||
2265 | memcpy (str_zero, str, len); | |
2266 | str_zero[len] = '\0'; | |
2267 | ||
2268 | slot = htab_find_slot (mnemonic_htab, str_zero, INSERT); | |
2269 | ||
2270 | if (*slot) | |
2271 | return; | |
2272 | ||
2273 | /* Not found; create a permanent copy and add it to the hash table. */ | |
2274 | new_str = XNEWVAR (char, len + 1); | |
2275 | memcpy (new_str, str_zero, len + 1); | |
2276 | *slot = new_str; | |
2277 | } | |
2278 | ||
2279 | /* Scan INSN for mnemonic strings and add them to the mnemonic hash | |
2280 | table in MNEMONIC_HTAB. | |
2281 | ||
2282 | The mnemonics cannot be found if they are emitted using C code. | |
2283 | ||
2284 | If a mnemonic string contains ';' or a newline the string assumed | |
2285 | to consist of more than a single instruction. The attribute value | |
2286 | will then be set to the user defined default value. */ | |
2287 | ||
2288 | static void | |
2289 | gen_mnemonic_setattr (htab_t mnemonic_htab, rtx insn) | |
2290 | { | |
2291 | const char *template_code, *cp; | |
2292 | int i; | |
2293 | int vec_len; | |
2294 | rtx set_attr; | |
2295 | char *attr_name; | |
2296 | rtvec new_vec; | |
2297 | ||
2298 | template_code = XTMPL (insn, 3); | |
2299 | ||
2300 | /* Skip patterns which use C code to emit the template. */ | |
2301 | if (template_code[0] == '*') | |
2302 | return; | |
2303 | ||
2304 | if (template_code[0] == '@') | |
2305 | cp = &template_code[1]; | |
2306 | else | |
2307 | cp = &template_code[0]; | |
2308 | ||
2309 | for (i = 0; *cp; ) | |
2310 | { | |
2311 | const char *ep, *sp; | |
2312 | int size = 0; | |
2313 | ||
2314 | while (ISSPACE (*cp)) | |
2315 | cp++; | |
2316 | ||
2317 | for (ep = sp = cp; !IS_VSPACE (*ep) && *ep != '\0'; ++ep) | |
2318 | if (!ISSPACE (*ep)) | |
2319 | sp = ep + 1; | |
2320 | ||
2321 | if (i > 0) | |
2322 | obstack_1grow (&string_obstack, ','); | |
2323 | ||
2324 | while (cp < sp && ((*cp >= '0' && *cp <= '9') | |
2325 | || (*cp >= 'a' && *cp <= 'z'))) | |
2326 | ||
2327 | { | |
2328 | obstack_1grow (&string_obstack, *cp); | |
2329 | cp++; | |
2330 | size++; | |
2331 | } | |
2332 | ||
2333 | while (cp < sp) | |
2334 | { | |
2335 | if (*cp == ';' || (*cp == '\\' && cp[1] == 'n')) | |
2336 | { | |
2337 | /* Don't set a value if there are more than one | |
2338 | instruction in the string. */ | |
2339 | obstack_next_free (&string_obstack) = | |
2340 | obstack_next_free (&string_obstack) - size; | |
2341 | size = 0; | |
2342 | ||
2343 | cp = sp; | |
2344 | break; | |
2345 | } | |
2346 | cp++; | |
2347 | } | |
2348 | if (size == 0) | |
2349 | obstack_1grow (&string_obstack, '*'); | |
2350 | else | |
2351 | add_mnemonic_string (mnemonic_htab, | |
2352 | obstack_next_free (&string_obstack) - size, | |
2353 | size); | |
2354 | i++; | |
2355 | } | |
2356 | ||
2357 | /* An insn definition might emit an empty string. */ | |
2358 | if (obstack_object_size (&string_obstack) == 0) | |
2359 | return; | |
2360 | ||
2361 | obstack_1grow (&string_obstack, '\0'); | |
2362 | ||
2363 | set_attr = rtx_alloc (SET_ATTR); | |
2364 | XSTR (set_attr, 1) = XOBFINISH (&string_obstack, char *); | |
2365 | attr_name = XNEWVAR (char, strlen (MNEMONIC_ATTR_NAME) + 1); | |
2366 | strcpy (attr_name, MNEMONIC_ATTR_NAME); | |
2367 | XSTR (set_attr, 0) = attr_name; | |
2368 | ||
2369 | if (!XVEC (insn, 4)) | |
2370 | vec_len = 0; | |
2371 | else | |
2372 | vec_len = XVECLEN (insn, 4); | |
2373 | ||
2374 | new_vec = rtvec_alloc (vec_len + 1); | |
2375 | for (i = 0; i < vec_len; i++) | |
2376 | RTVEC_ELT (new_vec, i) = XVECEXP (insn, 4, i); | |
2377 | RTVEC_ELT (new_vec, vec_len) = set_attr; | |
2378 | XVEC (insn, 4) = new_vec; | |
2379 | } | |
2380 | ||
2381 | /* This function is called for the elements in the mnemonic hashtable | |
2382 | and generates a comma separated list of the mnemonics. */ | |
2383 | ||
2384 | static int | |
2385 | mnemonic_htab_callback (void **slot, void *info ATTRIBUTE_UNUSED) | |
2386 | { | |
2387 | obstack_grow (&string_obstack, (char*)*slot, strlen ((char*)*slot)); | |
2388 | obstack_1grow (&string_obstack, ','); | |
2389 | return 1; | |
2390 | } | |
2391 | ||
2392 | /* Generate (set_attr "mnemonic" "..") RTXs and append them to every | |
2393 | insn definition in case the back end requests it by defining the | |
2394 | mnemonic attribute. The values for the attribute will be extracted | |
2395 | from the output patterns of the insn definitions as far as | |
2396 | possible. */ | |
2397 | ||
2398 | static void | |
2399 | gen_mnemonic_attr (void) | |
2400 | { | |
2401 | struct queue_elem *elem; | |
2402 | rtx mnemonic_attr = NULL; | |
2403 | htab_t mnemonic_htab; | |
2404 | const char *str, *p; | |
2405 | int i; | |
2406 | ||
2407 | if (have_error) | |
2408 | return; | |
2409 | ||
2410 | /* Look for the DEFINE_ATTR for `mnemonic'. */ | |
2411 | for (elem = define_attr_queue; elem != *define_attr_tail; elem = elem->next) | |
2412 | if (GET_CODE (elem->data) == DEFINE_ATTR | |
2413 | && strcmp (XSTR (elem->data, 0), MNEMONIC_ATTR_NAME) == 0) | |
2414 | { | |
2415 | mnemonic_attr = elem->data; | |
2416 | break; | |
2417 | } | |
2418 | ||
2419 | /* A (define_attr "mnemonic" "...") indicates that the back-end | |
2420 | wants a mnemonic attribute to be generated. */ | |
2421 | if (!mnemonic_attr) | |
2422 | return; | |
2423 | ||
2424 | mnemonic_htab = htab_create_alloc (MNEMONIC_HTAB_SIZE, htab_hash_string, | |
2425 | htab_eq_string, 0, xcalloc, free); | |
2426 | ||
2427 | for (elem = define_insn_queue; elem; elem = elem->next) | |
2428 | { | |
2429 | rtx insn = elem->data; | |
2430 | bool found = false; | |
2431 | ||
2432 | /* Check if the insn definition already has | |
2433 | (set_attr "mnemonic" ...). */ | |
2434 | if (XVEC (insn, 4)) | |
2435 | for (i = 0; i < XVECLEN (insn, 4); i++) | |
2436 | if (strcmp (XSTR (XVECEXP (insn, 4, i), 0), MNEMONIC_ATTR_NAME) == 0) | |
2437 | { | |
2438 | found = true; | |
2439 | break; | |
2440 | } | |
2441 | ||
2442 | if (!found) | |
2443 | gen_mnemonic_setattr (mnemonic_htab, insn); | |
2444 | } | |
2445 | ||
2446 | /* Add the user defined values to the hash table. */ | |
2447 | str = XSTR (mnemonic_attr, 1); | |
2448 | while ((p = scan_comma_elt (&str)) != NULL) | |
2449 | add_mnemonic_string (mnemonic_htab, p, str - p); | |
2450 | ||
2451 | htab_traverse (mnemonic_htab, mnemonic_htab_callback, NULL); | |
2452 | ||
2453 | /* Replace the last ',' with the zero end character. */ | |
2454 | *((char *)obstack_next_free (&string_obstack) - 1) = '\0'; | |
2455 | XSTR (mnemonic_attr, 1) = XOBFINISH (&string_obstack, char *); | |
2456 | } | |
2457 | ||
477c104e MK |
2458 | /* Check if there are DEFINE_ATTRs with the same name. */ |
2459 | static void | |
2460 | check_define_attr_duplicates () | |
2461 | { | |
2462 | struct queue_elem *elem; | |
2463 | htab_t attr_htab; | |
2464 | char * attr_name; | |
2465 | void **slot; | |
2466 | ||
2467 | attr_htab = htab_create (500, htab_hash_string, htab_eq_string, NULL); | |
2468 | ||
2469 | for (elem = define_attr_queue; elem; elem = elem->next) | |
2470 | { | |
2471 | attr_name = xstrdup (XSTR (elem->data, 0)); | |
2472 | ||
2473 | slot = htab_find_slot (attr_htab, attr_name, INSERT); | |
2474 | ||
2475 | /* Duplicate. */ | |
2476 | if (*slot) | |
2477 | { | |
2478 | error_with_line (elem->lineno, "redefinition of attribute '%s'", | |
2479 | attr_name); | |
2480 | htab_delete (attr_htab); | |
2481 | return; | |
2482 | } | |
2483 | ||
2484 | *slot = attr_name; | |
2485 | } | |
2486 | ||
2487 | htab_delete (attr_htab); | |
2488 | } | |
2489 | ||
04d8aa70 AM |
2490 | /* The entry point for initializing the reader. */ |
2491 | ||
600ab3fc RS |
2492 | bool |
2493 | init_rtx_reader_args_cb (int argc, char **argv, | |
2494 | bool (*parse_opt) (const char *)) | |
04d8aa70 | 2495 | { |
1c7352cd ZW |
2496 | /* Prepare to read input. */ |
2497 | condition_table = htab_create (500, hash_c_test, cmp_c_test, NULL); | |
e543e219 | 2498 | init_predicate_table (); |
3916d6d8 | 2499 | obstack_init (rtl_obstack); |
e714561a SB |
2500 | |
2501 | /* Start at 1, to make 0 available for CODE_FOR_nothing. */ | |
2502 | sequence_num = 1; | |
1c7352cd | 2503 | |
600ab3fc | 2504 | read_md_files (argc, argv, parse_opt, rtx_handle_directive); |
3262c1f5 | 2505 | |
477c104e MK |
2506 | if (define_attr_queue != NULL) |
2507 | check_define_attr_duplicates (); | |
2508 | ||
3262c1f5 RH |
2509 | /* Process define_cond_exec patterns. */ |
2510 | if (define_cond_exec_queue != NULL) | |
2511 | process_define_cond_exec (); | |
2512 | ||
477c104e MK |
2513 | /* Process define_subst patterns. */ |
2514 | if (define_subst_queue != NULL) | |
2515 | process_define_subst (); | |
2516 | ||
64aad689 AK |
2517 | if (define_attr_queue != NULL) |
2518 | gen_mnemonic_attr (); | |
2519 | ||
600ab3fc | 2520 | return !have_error; |
3262c1f5 RH |
2521 | } |
2522 | ||
f9942f4e ZW |
2523 | /* Programs that don't have their own options can use this entry point |
2524 | instead. */ | |
600ab3fc RS |
2525 | bool |
2526 | init_rtx_reader_args (int argc, char **argv) | |
f9942f4e | 2527 | { |
600ab3fc | 2528 | return init_rtx_reader_args_cb (argc, argv, 0); |
f9942f4e ZW |
2529 | } |
2530 | \f | |
e714561a SB |
2531 | /* The entry point for reading a single rtx from an md file. Return |
2532 | the rtx, or NULL if the md file has been fully processed. | |
2533 | Return the line where the rtx was found in LINENO. | |
2534 | Return the number of code generating rtx'en read since the start | |
2535 | of the md file in SEQNR. */ | |
3262c1f5 RH |
2536 | |
2537 | rtx | |
3d7aafde | 2538 | read_md_rtx (int *lineno, int *seqnr) |
3262c1f5 RH |
2539 | { |
2540 | struct queue_elem **queue, *elem; | |
2541 | rtx desc; | |
2542 | ||
2199e5fa ZW |
2543 | discard: |
2544 | ||
3262c1f5 RH |
2545 | /* Read all patterns from a given queue before moving on to the next. */ |
2546 | if (define_attr_queue != NULL) | |
2547 | queue = &define_attr_queue; | |
e543e219 ZW |
2548 | else if (define_pred_queue != NULL) |
2549 | queue = &define_pred_queue; | |
3262c1f5 RH |
2550 | else if (define_insn_queue != NULL) |
2551 | queue = &define_insn_queue; | |
2552 | else if (other_queue != NULL) | |
2553 | queue = &other_queue; | |
2554 | else | |
2555 | return NULL_RTX; | |
2556 | ||
2557 | elem = *queue; | |
2558 | *queue = elem->next; | |
2559 | desc = elem->data; | |
d2a3ce4e | 2560 | read_md_filename = elem->filename; |
3262c1f5 | 2561 | *lineno = elem->lineno; |
c88c0d42 | 2562 | *seqnr = sequence_num; |
3262c1f5 RH |
2563 | |
2564 | free (elem); | |
2565 | ||
2199e5fa ZW |
2566 | /* Discard insn patterns which we know can never match (because |
2567 | their C test is provably always false). If insn_elision is | |
2568 | false, our caller needs to see all the patterns. Note that the | |
2569 | elided patterns are never counted by the sequence numbering; it | |
1a84c183 | 2570 | is the caller's responsibility, when insn_elision is false, not |
2199e5fa | 2571 | to use elided pattern numbers for anything. */ |
c88c0d42 CP |
2572 | switch (GET_CODE (desc)) |
2573 | { | |
3262c1f5 RH |
2574 | case DEFINE_INSN: |
2575 | case DEFINE_EXPAND: | |
477c104e | 2576 | case DEFINE_SUBST: |
2199e5fa ZW |
2577 | if (maybe_eval_c_test (XSTR (desc, 2)) != 0) |
2578 | sequence_num++; | |
2579 | else if (insn_elision) | |
2580 | goto discard; | |
0458fe77 ZW |
2581 | |
2582 | /* *seqnr is used here so the name table will match caller's | |
2583 | idea of insn numbering, whether or not elision is active. */ | |
2584 | record_insn_name (*seqnr, XSTR (desc, 0)); | |
2199e5fa ZW |
2585 | break; |
2586 | ||
3262c1f5 RH |
2587 | case DEFINE_SPLIT: |
2588 | case DEFINE_PEEPHOLE: | |
2589 | case DEFINE_PEEPHOLE2: | |
2199e5fa ZW |
2590 | if (maybe_eval_c_test (XSTR (desc, 1)) != 0) |
2591 | sequence_num++; | |
2592 | else if (insn_elision) | |
2593 | goto discard; | |
3262c1f5 RH |
2594 | break; |
2595 | ||
2596 | default: | |
2597 | break; | |
c88c0d42 CP |
2598 | } |
2599 | ||
2600 | return desc; | |
2601 | } | |
9a5834ae | 2602 | |
2199e5fa ZW |
2603 | /* Helper functions for insn elision. */ |
2604 | ||
2605 | /* Compute a hash function of a c_test structure, which is keyed | |
2606 | by its ->expr field. */ | |
2607 | hashval_t | |
3d7aafde | 2608 | hash_c_test (const void *x) |
2199e5fa ZW |
2609 | { |
2610 | const struct c_test *a = (const struct c_test *) x; | |
2611 | const unsigned char *base, *s = (const unsigned char *) a->expr; | |
2612 | hashval_t hash; | |
2613 | unsigned char c; | |
2614 | unsigned int len; | |
2615 | ||
2616 | base = s; | |
2617 | hash = 0; | |
2618 | ||
2619 | while ((c = *s++) != '\0') | |
2620 | { | |
2621 | hash += c + (c << 17); | |
2622 | hash ^= hash >> 2; | |
2623 | } | |
2624 | ||
2625 | len = s - base; | |
2626 | hash += len + (len << 17); | |
2627 | hash ^= hash >> 2; | |
2628 | ||
2629 | return hash; | |
2630 | } | |
2631 | ||
2632 | /* Compare two c_test expression structures. */ | |
2633 | int | |
3d7aafde | 2634 | cmp_c_test (const void *x, const void *y) |
2199e5fa ZW |
2635 | { |
2636 | const struct c_test *a = (const struct c_test *) x; | |
2637 | const struct c_test *b = (const struct c_test *) y; | |
2638 | ||
2639 | return !strcmp (a->expr, b->expr); | |
2640 | } | |
2641 | ||
2642 | /* Given a string representing a C test expression, look it up in the | |
2643 | condition_table and report whether or not its value is known | |
2644 | at compile time. Returns a tristate: 1 for known true, 0 for | |
2645 | known false, -1 for unknown. */ | |
2646 | int | |
3d7aafde | 2647 | maybe_eval_c_test (const char *expr) |
2199e5fa ZW |
2648 | { |
2649 | const struct c_test *test; | |
2650 | struct c_test dummy; | |
2651 | ||
52831d13 | 2652 | if (expr[0] == 0) |
2199e5fa ZW |
2653 | return 1; |
2654 | ||
2199e5fa | 2655 | dummy.expr = expr; |
5d038c4c | 2656 | test = (const struct c_test *)htab_find (condition_table, &dummy); |
1c7352cd ZW |
2657 | if (!test) |
2658 | return -1; | |
2199e5fa ZW |
2659 | return test->value; |
2660 | } | |
2661 | ||
1c7352cd ZW |
2662 | /* Record the C test expression EXPR in the condition_table, with |
2663 | value VAL. Duplicates clobber previous entries. */ | |
2664 | ||
2665 | void | |
2666 | add_c_test (const char *expr, int value) | |
2667 | { | |
2668 | struct c_test *test; | |
2669 | ||
2670 | if (expr[0] == 0) | |
2671 | return; | |
2672 | ||
2673 | test = XNEW (struct c_test); | |
2674 | test->expr = expr; | |
2675 | test->value = value; | |
2676 | ||
2677 | *(htab_find_slot (condition_table, test, INSERT)) = test; | |
2678 | } | |
2679 | ||
2680 | /* For every C test, call CALLBACK with two arguments: a pointer to | |
2681 | the condition structure and INFO. Stops when CALLBACK returns zero. */ | |
2682 | void | |
2683 | traverse_c_tests (htab_trav callback, void *info) | |
2684 | { | |
2685 | if (condition_table) | |
2686 | htab_traverse (condition_table, callback, info); | |
2687 | } | |
2688 | ||
e543e219 ZW |
2689 | /* Helper functions for define_predicate and define_special_predicate |
2690 | processing. Shared between genrecog.c and genpreds.c. */ | |
2691 | ||
2692 | static htab_t predicate_table; | |
2693 | struct pred_data *first_predicate; | |
2694 | static struct pred_data **last_predicate = &first_predicate; | |
2695 | ||
2696 | static hashval_t | |
2697 | hash_struct_pred_data (const void *ptr) | |
2698 | { | |
2699 | return htab_hash_string (((const struct pred_data *)ptr)->name); | |
2700 | } | |
2701 | ||
2702 | static int | |
2703 | eq_struct_pred_data (const void *a, const void *b) | |
2704 | { | |
2705 | return !strcmp (((const struct pred_data *)a)->name, | |
2706 | ((const struct pred_data *)b)->name); | |
2707 | } | |
2708 | ||
2709 | struct pred_data * | |
2710 | lookup_predicate (const char *name) | |
2711 | { | |
2712 | struct pred_data key; | |
2713 | key.name = name; | |
cceb1885 | 2714 | return (struct pred_data *) htab_find (predicate_table, &key); |
e543e219 ZW |
2715 | } |
2716 | ||
e663da80 RS |
2717 | /* Record that predicate PRED can accept CODE. */ |
2718 | ||
2719 | void | |
2720 | add_predicate_code (struct pred_data *pred, enum rtx_code code) | |
2721 | { | |
2722 | if (!pred->codes[code]) | |
2723 | { | |
2724 | pred->num_codes++; | |
2725 | pred->codes[code] = true; | |
2726 | ||
2727 | if (GET_RTX_CLASS (code) != RTX_CONST_OBJ) | |
2728 | pred->allows_non_const = true; | |
2729 | ||
2730 | if (code != REG | |
2731 | && code != SUBREG | |
2732 | && code != MEM | |
2733 | && code != CONCAT | |
2734 | && code != PARALLEL | |
a8fd4225 GS |
2735 | && code != STRICT_LOW_PART |
2736 | && code != SCRATCH) | |
e663da80 RS |
2737 | pred->allows_non_lvalue = true; |
2738 | ||
2739 | if (pred->num_codes == 1) | |
2740 | pred->singleton = code; | |
2741 | else if (pred->num_codes == 2) | |
2742 | pred->singleton = UNKNOWN; | |
2743 | } | |
2744 | } | |
2745 | ||
e543e219 ZW |
2746 | void |
2747 | add_predicate (struct pred_data *pred) | |
2748 | { | |
2749 | void **slot = htab_find_slot (predicate_table, pred, INSERT); | |
2750 | if (*slot) | |
2751 | { | |
2752 | error ("duplicate predicate definition for '%s'", pred->name); | |
2753 | return; | |
2754 | } | |
2755 | *slot = pred; | |
2756 | *last_predicate = pred; | |
2757 | last_predicate = &pred->next; | |
2758 | } | |
2759 | ||
2760 | /* This array gives the initial content of the predicate table. It | |
c2acaf06 | 2761 | has entries for all predicates defined in recog.c. */ |
e543e219 | 2762 | |
ebce9df7 | 2763 | struct std_pred_table |
e543e219 ZW |
2764 | { |
2765 | const char *name; | |
ebce9df7 | 2766 | bool special; |
e663da80 | 2767 | bool allows_const_p; |
e543e219 ZW |
2768 | RTX_CODE codes[NUM_RTX_CODE]; |
2769 | }; | |
2770 | ||
ebce9df7 | 2771 | static const struct std_pred_table std_preds[] = { |
e663da80 RS |
2772 | {"general_operand", false, true, {SUBREG, REG, MEM}}, |
2773 | {"address_operand", true, true, {SUBREG, REG, MEM, PLUS, MINUS, MULT}}, | |
2774 | {"register_operand", false, false, {SUBREG, REG}}, | |
2775 | {"pmode_register_operand", true, false, {SUBREG, REG}}, | |
2776 | {"scratch_operand", false, false, {SCRATCH, REG}}, | |
81f40b79 | 2777 | {"immediate_operand", false, true, {UNKNOWN}}, |
e663da80 RS |
2778 | {"const_int_operand", false, false, {CONST_INT}}, |
2779 | {"const_double_operand", false, false, {CONST_INT, CONST_DOUBLE}}, | |
2780 | {"nonimmediate_operand", false, false, {SUBREG, REG, MEM}}, | |
2781 | {"nonmemory_operand", false, true, {SUBREG, REG}}, | |
2782 | {"push_operand", false, false, {MEM}}, | |
2783 | {"pop_operand", false, false, {MEM}}, | |
2784 | {"memory_operand", false, false, {SUBREG, MEM}}, | |
2785 | {"indirect_operand", false, false, {SUBREG, MEM}}, | |
c6963675 PB |
2786 | {"ordered_comparison_operator", false, false, {EQ, NE, |
2787 | LE, LT, GE, GT, | |
2788 | LEU, LTU, GEU, GTU}}, | |
e663da80 RS |
2789 | {"comparison_operator", false, false, {EQ, NE, |
2790 | LE, LT, GE, GT, | |
2791 | LEU, LTU, GEU, GTU, | |
2792 | UNORDERED, ORDERED, | |
2793 | UNEQ, UNGE, UNGT, | |
2794 | UNLE, UNLT, LTGT}} | |
e543e219 | 2795 | }; |
ebce9df7 | 2796 | #define NUM_KNOWN_STD_PREDS ARRAY_SIZE (std_preds) |
e543e219 ZW |
2797 | |
2798 | /* Initialize the table of predicate definitions, starting with | |
c2acaf06 | 2799 | the information we have on generic predicates. */ |
e543e219 ZW |
2800 | |
2801 | static void | |
2802 | init_predicate_table (void) | |
2803 | { | |
2804 | size_t i, j; | |
2805 | struct pred_data *pred; | |
2806 | ||
2807 | predicate_table = htab_create_alloc (37, hash_struct_pred_data, | |
2808 | eq_struct_pred_data, 0, | |
2809 | xcalloc, free); | |
2810 | ||
ebce9df7 | 2811 | for (i = 0; i < NUM_KNOWN_STD_PREDS; i++) |
e543e219 | 2812 | { |
cceb1885 | 2813 | pred = XCNEW (struct pred_data); |
ebce9df7 PB |
2814 | pred->name = std_preds[i].name; |
2815 | pred->special = std_preds[i].special; | |
e543e219 | 2816 | |
ebce9df7 | 2817 | for (j = 0; std_preds[i].codes[j] != 0; j++) |
e663da80 RS |
2818 | add_predicate_code (pred, std_preds[i].codes[j]); |
2819 | ||
2820 | if (std_preds[i].allows_const_p) | |
2821 | for (j = 0; j < NUM_RTX_CODE; j++) | |
2822 | if (GET_RTX_CLASS (j) == RTX_CONST_OBJ) | |
bbbbb16a | 2823 | add_predicate_code (pred, (enum rtx_code) j); |
b8698a0f | 2824 | |
e543e219 ZW |
2825 | add_predicate (pred); |
2826 | } | |
e543e219 | 2827 | } |
0458fe77 ZW |
2828 | \f |
2829 | /* These functions allow linkage with print-rtl.c. Also, some generators | |
2830 | like to annotate their output with insn names. */ | |
2831 | ||
2832 | /* Holds an array of names indexed by insn_code_number. */ | |
2833 | static char **insn_name_ptr = 0; | |
2834 | static int insn_name_ptr_size = 0; | |
2835 | ||
2836 | const char * | |
2837 | get_insn_name (int code) | |
2838 | { | |
2839 | if (code < insn_name_ptr_size) | |
2840 | return insn_name_ptr[code]; | |
2841 | else | |
2842 | return NULL; | |
2843 | } | |
2844 | ||
2845 | static void | |
2846 | record_insn_name (int code, const char *name) | |
2847 | { | |
2848 | static const char *last_real_name = "insn"; | |
2849 | static int last_real_code = 0; | |
8ad97cfc | 2850 | char *new_name; |
0458fe77 ZW |
2851 | |
2852 | if (insn_name_ptr_size <= code) | |
2853 | { | |
2854 | int new_size; | |
2855 | new_size = (insn_name_ptr_size ? insn_name_ptr_size * 2 : 512); | |
7cbb2a85 | 2856 | insn_name_ptr = XRESIZEVEC (char *, insn_name_ptr, new_size); |
0458fe77 ZW |
2857 | memset (insn_name_ptr + insn_name_ptr_size, 0, |
2858 | sizeof(char *) * (new_size - insn_name_ptr_size)); | |
2859 | insn_name_ptr_size = new_size; | |
2860 | } | |
2861 | ||
2862 | if (!name || name[0] == '\0') | |
2863 | { | |
8ad97cfc KG |
2864 | new_name = XNEWVAR (char, strlen (last_real_name) + 10); |
2865 | sprintf (new_name, "%s+%d", last_real_name, code - last_real_code); | |
0458fe77 ZW |
2866 | } |
2867 | else | |
2868 | { | |
8ad97cfc | 2869 | last_real_name = new_name = xstrdup (name); |
0458fe77 ZW |
2870 | last_real_code = code; |
2871 | } | |
2872 | ||
8ad97cfc | 2873 | insn_name_ptr[code] = new_name; |
0458fe77 | 2874 | } |
e792559a RS |
2875 | \f |
2876 | /* Make STATS describe the operands that appear in rtx X. */ | |
2877 | ||
2878 | static void | |
2879 | get_pattern_stats_1 (struct pattern_stats *stats, rtx x) | |
2880 | { | |
2881 | RTX_CODE code; | |
2882 | int i; | |
2883 | int len; | |
2884 | const char *fmt; | |
2885 | ||
2886 | if (x == NULL_RTX) | |
2887 | return; | |
2888 | ||
2889 | code = GET_CODE (x); | |
2890 | switch (code) | |
2891 | { | |
2892 | case MATCH_OPERAND: | |
2893 | case MATCH_OPERATOR: | |
2894 | case MATCH_PARALLEL: | |
2895 | stats->max_opno = MAX (stats->max_opno, XINT (x, 0)); | |
2896 | break; | |
2897 | ||
2898 | case MATCH_DUP: | |
2899 | case MATCH_OP_DUP: | |
2900 | case MATCH_PAR_DUP: | |
2901 | stats->num_dups++; | |
2902 | stats->max_dup_opno = MAX (stats->max_dup_opno, XINT (x, 0)); | |
2903 | break; | |
2904 | ||
2905 | case MATCH_SCRATCH: | |
2906 | stats->max_scratch_opno = MAX (stats->max_scratch_opno, XINT (x, 0)); | |
2907 | break; | |
2908 | ||
2909 | default: | |
2910 | break; | |
2911 | } | |
2912 | ||
2913 | fmt = GET_RTX_FORMAT (code); | |
2914 | len = GET_RTX_LENGTH (code); | |
2915 | for (i = 0; i < len; i++) | |
2916 | { | |
2917 | if (fmt[i] == 'e' || fmt[i] == 'u') | |
2918 | get_pattern_stats_1 (stats, XEXP (x, i)); | |
2919 | else if (fmt[i] == 'E') | |
2920 | { | |
2921 | int j; | |
2922 | for (j = 0; j < XVECLEN (x, i); j++) | |
2923 | get_pattern_stats_1 (stats, XVECEXP (x, i, j)); | |
2924 | } | |
2925 | } | |
2926 | } | |
2927 | ||
2928 | /* Make STATS describe the operands that appear in instruction pattern | |
2929 | PATTERN. */ | |
2930 | ||
2931 | void | |
2932 | get_pattern_stats (struct pattern_stats *stats, rtvec pattern) | |
2933 | { | |
2934 | int i, len; | |
2935 | ||
2936 | stats->max_opno = -1; | |
2937 | stats->max_dup_opno = -1; | |
2938 | stats->max_scratch_opno = -1; | |
2939 | stats->num_dups = 0; | |
2940 | ||
2941 | len = GET_NUM_ELEM (pattern); | |
2942 | for (i = 0; i < len; i++) | |
2943 | get_pattern_stats_1 (stats, RTVEC_ELT (pattern, i)); | |
2944 | ||
2945 | stats->num_generator_args = stats->max_opno + 1; | |
2946 | stats->num_insn_operands = MAX (stats->max_opno, | |
2947 | stats->max_scratch_opno) + 1; | |
2948 | stats->num_operand_vars = MAX (stats->max_opno, | |
2949 | MAX (stats->max_dup_opno, | |
2950 | stats->max_scratch_opno)) + 1; | |
2951 | } |