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[official-gcc.git] / gcc / genoutput.c
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1 /* Generate code from to output assembler insns as recognized from rtl.
2 Copyright (C) 1987, 1988, 1992, 1994, 1995, 1997, 1998, 1999, 2000, 2002,
3 2003, 2004, 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
10 version.
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* This program reads the machine description for the compiler target machine
23 and produces a file containing these things:
25 1. An array of `struct insn_data_d', which is indexed by insn code number,
26 which contains:
28 a. `name' is the name for that pattern. Nameless patterns are
29 given a name.
31 b. `output' hold either the output template, an array of output
32 templates, or an output function.
34 c. `genfun' is the function to generate a body for that pattern,
35 given operands as arguments.
37 d. `n_operands' is the number of distinct operands in the pattern
38 for that insn,
40 e. `n_dups' is the number of match_dup's that appear in the insn's
41 pattern. This says how many elements of `recog_data.dup_loc' are
42 significant after an insn has been recognized.
44 f. `n_alternatives' is the number of alternatives in the constraints
45 of each pattern.
47 g. `output_format' tells what type of thing `output' is.
49 h. `operand' is the base of an array of operand data for the insn.
51 2. An array of `struct insn_operand data', used by `operand' above.
53 a. `predicate', an int-valued function, is the match_operand predicate
54 for this operand.
56 b. `constraint' is the constraint for this operand.
58 c. `address_p' indicates that the operand appears within ADDRESS
59 rtx's.
61 d. `mode' is the machine mode that that operand is supposed to have.
63 e. `strict_low', is nonzero for operands contained in a STRICT_LOW_PART.
65 f. `eliminable', is nonzero for operands that are matched normally by
66 MATCH_OPERAND; it is zero for operands that should not be changed during
67 register elimination such as MATCH_OPERATORs.
69 g. `allows_mem', is true for operands that accept MEM rtxes.
71 The code number of an insn is simply its position in the machine
72 description; code numbers are assigned sequentially to entries in
73 the description, starting with code number 0.
75 Thus, the following entry in the machine description
77 (define_insn "clrdf"
78 [(set (match_operand:DF 0 "general_operand" "")
79 (const_int 0))]
81 "clrd %0")
83 assuming it is the 25th entry present, would cause
84 insn_data[24].template to be "clrd %0", and
85 insn_data[24].n_operands to be 1. */
87 #include "bconfig.h"
88 #include "system.h"
89 #include "coretypes.h"
90 #include "tm.h"
91 #include "rtl.h"
92 #include "errors.h"
93 #include "read-md.h"
94 #include "gensupport.h"
96 /* No instruction can have more operands than this. Sorry for this
97 arbitrary limit, but what machine will have an instruction with
98 this many operands? */
100 #define MAX_MAX_OPERANDS 40
102 static int n_occurrences (int, const char *);
103 static const char *strip_whitespace (const char *);
105 /* insns in the machine description are assigned sequential code numbers
106 that are used by insn-recog.c (produced by genrecog) to communicate
107 to insn-output.c (produced by this program). */
109 static int next_code_number;
111 /* This counts all definitions in the md file,
112 for the sake of error messages. */
114 static int next_index_number;
116 /* This counts all operands used in the md file. The first is null. */
118 static int next_operand_number = 1;
120 /* Record in this chain all information about the operands we will output. */
122 struct operand_data
124 struct operand_data *next;
125 int index;
126 const char *predicate;
127 const char *constraint;
128 enum machine_mode mode;
129 unsigned char n_alternatives;
130 char address_p;
131 char strict_low;
132 char eliminable;
133 char seen;
136 /* Begin with a null operand at index 0. */
138 static struct operand_data null_operand =
140 0, 0, "", "", VOIDmode, 0, 0, 0, 0, 0
143 static struct operand_data *odata = &null_operand;
144 static struct operand_data **odata_end = &null_operand.next;
146 /* Must match the constants in recog.h. */
148 #define INSN_OUTPUT_FORMAT_NONE 0 /* abort */
149 #define INSN_OUTPUT_FORMAT_SINGLE 1 /* const char * */
150 #define INSN_OUTPUT_FORMAT_MULTI 2 /* const char * const * */
151 #define INSN_OUTPUT_FORMAT_FUNCTION 3 /* const char * (*)(...) */
153 /* Record in this chain all information that we will output,
154 associated with the code number of the insn. */
156 struct data
158 struct data *next;
159 const char *name;
160 const char *template_code;
161 int code_number;
162 int index_number;
163 const char *filename;
164 int lineno;
165 int n_generator_args; /* Number of arguments passed to generator */
166 int n_operands; /* Number of operands this insn recognizes */
167 int n_dups; /* Number times match_dup appears in pattern */
168 int n_alternatives; /* Number of alternatives in each constraint */
169 int operand_number; /* Operand index in the big array. */
170 int output_format; /* INSN_OUTPUT_FORMAT_*. */
171 struct operand_data operand[MAX_MAX_OPERANDS];
174 /* This variable points to the first link in the insn chain. */
176 static struct data *idata, **idata_end = &idata;
178 static void output_prologue (void);
179 static void output_operand_data (void);
180 static void output_insn_data (void);
181 static void output_get_insn_name (void);
182 static void scan_operands (struct data *, rtx, int, int);
183 static int compare_operands (struct operand_data *,
184 struct operand_data *);
185 static void place_operands (struct data *);
186 static void process_template (struct data *, const char *);
187 static void validate_insn_alternatives (struct data *);
188 static void validate_insn_operands (struct data *);
189 static void gen_insn (rtx, int);
190 static void gen_peephole (rtx, int);
191 static void gen_expand (rtx, int);
192 static void gen_split (rtx, int);
194 #ifdef USE_MD_CONSTRAINTS
196 struct constraint_data
198 struct constraint_data *next_this_letter;
199 int lineno;
200 unsigned int namelen;
201 const char name[1];
204 /* This is a complete list (unlike the one in genpreds.c) of constraint
205 letters and modifiers with machine-independent meaning. The only
206 omission is digits, as these are handled specially. */
207 static const char indep_constraints[] = ",=+%*?!#&<>EFVXgimnoprs";
209 static struct constraint_data *
210 constraints_by_letter_table[1 << CHAR_BIT];
212 static int mdep_constraint_len (const char *, int, int);
213 static void note_constraint (rtx, int);
215 #else /* !USE_MD_CONSTRAINTS */
217 static void check_constraint_len (void);
218 static int constraint_len (const char *, int);
220 #endif /* !USE_MD_CONSTRAINTS */
223 static void
224 output_prologue (void)
226 printf ("/* Generated automatically by the program `genoutput'\n\
227 from the machine description file `md'. */\n\n");
229 printf ("#include \"config.h\"\n");
230 printf ("#include \"system.h\"\n");
231 printf ("#include \"coretypes.h\"\n");
232 printf ("#include \"tm.h\"\n");
233 printf ("#include \"flags.h\"\n");
234 printf ("#include \"ggc.h\"\n");
235 printf ("#include \"rtl.h\"\n");
236 printf ("#include \"expr.h\"\n");
237 printf ("#include \"insn-codes.h\"\n");
238 printf ("#include \"tm_p.h\"\n");
239 printf ("#include \"function.h\"\n");
240 printf ("#include \"regs.h\"\n");
241 printf ("#include \"hard-reg-set.h\"\n");
242 printf ("#include \"insn-config.h\"\n\n");
243 printf ("#include \"conditions.h\"\n");
244 printf ("#include \"insn-attr.h\"\n\n");
245 printf ("#include \"recog.h\"\n\n");
246 printf ("#include \"diagnostic-core.h\"\n");
247 printf ("#include \"output.h\"\n");
248 printf ("#include \"target.h\"\n");
249 printf ("#include \"tm-constrs.h\"\n");
252 static void
253 output_operand_data (void)
255 struct operand_data *d;
257 printf ("\nstatic const struct insn_operand_data operand_data[] = \n{\n");
259 for (d = odata; d; d = d->next)
261 struct pred_data *pred;
263 printf (" {\n");
265 printf (" %s,\n",
266 d->predicate && d->predicate[0] ? d->predicate : "0");
268 printf (" \"%s\",\n", d->constraint ? d->constraint : "");
270 printf (" %smode,\n", GET_MODE_NAME (d->mode));
272 printf (" %d,\n", d->strict_low);
274 printf (" %d,\n", d->constraint == NULL ? 1 : 0);
276 printf (" %d,\n", d->eliminable);
278 pred = NULL;
279 if (d->predicate)
280 pred = lookup_predicate (d->predicate);
281 printf (" %d\n", pred && pred->codes[MEM]);
283 printf(" },\n");
285 printf("};\n\n\n");
288 static void
289 output_insn_data (void)
291 struct data *d;
292 int name_offset = 0;
293 int next_name_offset;
294 const char * last_name = 0;
295 const char * next_name = 0;
296 struct data *n;
298 for (n = idata, next_name_offset = 1; n; n = n->next, next_name_offset++)
299 if (n->name)
301 next_name = n->name;
302 break;
305 printf ("#if GCC_VERSION >= 2007\n__extension__\n#endif\n");
306 printf ("\nconst struct insn_data_d insn_data[] = \n{\n");
308 for (d = idata; d; d = d->next)
310 printf (" /* %s:%d */\n", d->filename, d->lineno);
311 printf (" {\n");
313 if (d->name)
315 printf (" \"%s\",\n", d->name);
316 name_offset = 0;
317 last_name = d->name;
318 next_name = 0;
319 for (n = d->next, next_name_offset = 1; n;
320 n = n->next, next_name_offset++)
322 if (n->name)
324 next_name = n->name;
325 break;
329 else
331 name_offset++;
332 if (next_name && (last_name == 0
333 || name_offset > next_name_offset / 2))
334 printf (" \"%s-%d\",\n", next_name,
335 next_name_offset - name_offset);
336 else
337 printf (" \"%s+%d\",\n", last_name, name_offset);
340 switch (d->output_format)
342 case INSN_OUTPUT_FORMAT_NONE:
343 printf ("#if HAVE_DESIGNATED_INITIALIZERS\n");
344 printf (" { 0 },\n");
345 printf ("#else\n");
346 printf (" { 0, 0, 0 },\n");
347 printf ("#endif\n");
348 break;
349 case INSN_OUTPUT_FORMAT_SINGLE:
351 const char *p = d->template_code;
352 char prev = 0;
354 printf ("#if HAVE_DESIGNATED_INITIALIZERS\n");
355 printf (" { .single =\n");
356 printf ("#else\n");
357 printf (" {\n");
358 printf ("#endif\n");
359 printf (" \"");
360 while (*p)
362 if (IS_VSPACE (*p) && prev != '\\')
364 /* Preserve two consecutive \n's or \r's, but treat \r\n
365 as a single newline. */
366 if (*p == '\n' && prev != '\r')
367 printf ("\\n\\\n");
369 else
370 putchar (*p);
371 prev = *p;
372 ++p;
374 printf ("\",\n");
375 printf ("#if HAVE_DESIGNATED_INITIALIZERS\n");
376 printf (" },\n");
377 printf ("#else\n");
378 printf (" 0, 0 },\n");
379 printf ("#endif\n");
381 break;
382 case INSN_OUTPUT_FORMAT_MULTI:
383 printf ("#if HAVE_DESIGNATED_INITIALIZERS\n");
384 printf (" { .multi = output_%d },\n", d->code_number);
385 printf ("#else\n");
386 printf (" { 0, output_%d, 0 },\n", d->code_number);
387 printf ("#endif\n");
388 break;
389 case INSN_OUTPUT_FORMAT_FUNCTION:
390 printf ("#if HAVE_DESIGNATED_INITIALIZERS\n");
391 printf (" { .function = output_%d },\n", d->code_number);
392 printf ("#else\n");
393 printf (" { 0, 0, output_%d },\n", d->code_number);
394 printf ("#endif\n");
395 break;
396 default:
397 gcc_unreachable ();
400 if (d->name && d->name[0] != '*')
401 printf (" (insn_gen_fn) gen_%s,\n", d->name);
402 else
403 printf (" 0,\n");
405 printf (" &operand_data[%d],\n", d->operand_number);
406 printf (" %d,\n", d->n_generator_args);
407 printf (" %d,\n", d->n_operands);
408 printf (" %d,\n", d->n_dups);
409 printf (" %d,\n", d->n_alternatives);
410 printf (" %d\n", d->output_format);
412 printf(" },\n");
414 printf ("};\n\n\n");
417 static void
418 output_get_insn_name (void)
420 printf ("const char *\n");
421 printf ("get_insn_name (int code)\n");
422 printf ("{\n");
423 printf (" if (code == NOOP_MOVE_INSN_CODE)\n");
424 printf (" return \"NOOP_MOVE\";\n");
425 printf (" else\n");
426 printf (" return insn_data[code].name;\n");
427 printf ("}\n");
431 /* Stores the operand data into `d->operand[i]'.
433 THIS_ADDRESS_P is nonzero if the containing rtx was an ADDRESS.
434 THIS_STRICT_LOW is nonzero if the containing rtx was a STRICT_LOW_PART. */
436 static void
437 scan_operands (struct data *d, rtx part, int this_address_p,
438 int this_strict_low)
440 int i, j;
441 const char *format_ptr;
442 int opno;
444 if (part == 0)
445 return;
447 switch (GET_CODE (part))
449 case MATCH_OPERAND:
450 opno = XINT (part, 0);
451 if (opno >= MAX_MAX_OPERANDS)
453 error_with_line (d->lineno, "maximum number of operands exceeded");
454 return;
456 if (d->operand[opno].seen)
457 error_with_line (d->lineno, "repeated operand number %d\n", opno);
459 d->operand[opno].seen = 1;
460 d->operand[opno].mode = GET_MODE (part);
461 d->operand[opno].strict_low = this_strict_low;
462 d->operand[opno].predicate = XSTR (part, 1);
463 d->operand[opno].constraint = strip_whitespace (XSTR (part, 2));
464 d->operand[opno].n_alternatives
465 = n_occurrences (',', d->operand[opno].constraint) + 1;
466 d->operand[opno].address_p = this_address_p;
467 d->operand[opno].eliminable = 1;
468 return;
470 case MATCH_SCRATCH:
471 opno = XINT (part, 0);
472 if (opno >= MAX_MAX_OPERANDS)
474 error_with_line (d->lineno, "maximum number of operands exceeded");
475 return;
477 if (d->operand[opno].seen)
478 error_with_line (d->lineno, "repeated operand number %d\n", opno);
480 d->operand[opno].seen = 1;
481 d->operand[opno].mode = GET_MODE (part);
482 d->operand[opno].strict_low = 0;
483 d->operand[opno].predicate = "scratch_operand";
484 d->operand[opno].constraint = strip_whitespace (XSTR (part, 1));
485 d->operand[opno].n_alternatives
486 = n_occurrences (',', d->operand[opno].constraint) + 1;
487 d->operand[opno].address_p = 0;
488 d->operand[opno].eliminable = 0;
489 return;
491 case MATCH_OPERATOR:
492 case MATCH_PARALLEL:
493 opno = XINT (part, 0);
494 if (opno >= MAX_MAX_OPERANDS)
496 error_with_line (d->lineno, "maximum number of operands exceeded");
497 return;
499 if (d->operand[opno].seen)
500 error_with_line (d->lineno, "repeated operand number %d\n", opno);
502 d->operand[opno].seen = 1;
503 d->operand[opno].mode = GET_MODE (part);
504 d->operand[opno].strict_low = 0;
505 d->operand[opno].predicate = XSTR (part, 1);
506 d->operand[opno].constraint = 0;
507 d->operand[opno].address_p = 0;
508 d->operand[opno].eliminable = 0;
509 for (i = 0; i < XVECLEN (part, 2); i++)
510 scan_operands (d, XVECEXP (part, 2, i), 0, 0);
511 return;
513 case ADDRESS:
514 scan_operands (d, XEXP (part, 0), 1, 0);
515 return;
517 case STRICT_LOW_PART:
518 scan_operands (d, XEXP (part, 0), 0, 1);
519 return;
521 default:
522 break;
525 format_ptr = GET_RTX_FORMAT (GET_CODE (part));
527 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (part)); i++)
528 switch (*format_ptr++)
530 case 'e':
531 case 'u':
532 scan_operands (d, XEXP (part, i), 0, 0);
533 break;
534 case 'E':
535 if (XVEC (part, i) != NULL)
536 for (j = 0; j < XVECLEN (part, i); j++)
537 scan_operands (d, XVECEXP (part, i, j), 0, 0);
538 break;
542 /* Compare two operands for content equality. */
544 static int
545 compare_operands (struct operand_data *d0, struct operand_data *d1)
547 const char *p0, *p1;
549 p0 = d0->predicate;
550 if (!p0)
551 p0 = "";
552 p1 = d1->predicate;
553 if (!p1)
554 p1 = "";
555 if (strcmp (p0, p1) != 0)
556 return 0;
558 p0 = d0->constraint;
559 if (!p0)
560 p0 = "";
561 p1 = d1->constraint;
562 if (!p1)
563 p1 = "";
564 if (strcmp (p0, p1) != 0)
565 return 0;
567 if (d0->mode != d1->mode)
568 return 0;
570 if (d0->strict_low != d1->strict_low)
571 return 0;
573 if (d0->eliminable != d1->eliminable)
574 return 0;
576 return 1;
579 /* Scan the list of operands we've already committed to output and either
580 find a subsequence that is the same, or allocate a new one at the end. */
582 static void
583 place_operands (struct data *d)
585 struct operand_data *od, *od2;
586 int i;
588 if (d->n_operands == 0)
590 d->operand_number = 0;
591 return;
594 /* Brute force substring search. */
595 for (od = odata, i = 0; od; od = od->next, i = 0)
596 if (compare_operands (od, &d->operand[0]))
598 od2 = od->next;
599 i = 1;
600 while (1)
602 if (i == d->n_operands)
603 goto full_match;
604 if (od2 == NULL)
605 goto partial_match;
606 if (! compare_operands (od2, &d->operand[i]))
607 break;
608 ++i, od2 = od2->next;
612 /* Either partial match at the end of the list, or no match. In either
613 case, we tack on what operands are remaining to the end of the list. */
614 partial_match:
615 d->operand_number = next_operand_number - i;
616 for (; i < d->n_operands; ++i)
618 od2 = &d->operand[i];
619 *odata_end = od2;
620 odata_end = &od2->next;
621 od2->index = next_operand_number++;
623 *odata_end = NULL;
624 return;
626 full_match:
627 d->operand_number = od->index;
628 return;
632 /* Process an assembler template from a define_insn or a define_peephole.
633 It is either the assembler code template, a list of assembler code
634 templates, or C code to generate the assembler code template. */
636 static void
637 process_template (struct data *d, const char *template_code)
639 const char *cp;
640 int i;
642 /* Templates starting with * contain straight code to be run. */
643 if (template_code[0] == '*')
645 d->template_code = 0;
646 d->output_format = INSN_OUTPUT_FORMAT_FUNCTION;
648 puts ("\nstatic const char *");
649 printf ("output_%d (rtx *operands ATTRIBUTE_UNUSED, rtx insn ATTRIBUTE_UNUSED)\n",
650 d->code_number);
651 puts ("{");
652 print_md_ptr_loc (template_code);
653 puts (template_code + 1);
654 puts ("}");
657 /* If the assembler code template starts with a @ it is a newline-separated
658 list of assembler code templates, one for each alternative. */
659 else if (template_code[0] == '@')
661 d->template_code = 0;
662 d->output_format = INSN_OUTPUT_FORMAT_MULTI;
664 printf ("\nstatic const char * const output_%d[] = {\n", d->code_number);
666 for (i = 0, cp = &template_code[1]; *cp; )
668 const char *ep, *sp;
670 while (ISSPACE (*cp))
671 cp++;
673 printf (" \"");
675 for (ep = sp = cp; !IS_VSPACE (*ep) && *ep != '\0'; ++ep)
676 if (!ISSPACE (*ep))
677 sp = ep + 1;
679 if (sp != ep)
680 message_with_line (d->lineno,
681 "trailing whitespace in output template");
683 while (cp < sp)
685 putchar (*cp);
686 cp++;
689 printf ("\",\n");
690 i++;
692 if (i == 1)
693 message_with_line (d->lineno,
694 "'@' is redundant for output template with single alternative");
695 if (i != d->n_alternatives)
696 error_with_line (d->lineno,
697 "wrong number of alternatives in the output template");
699 printf ("};\n");
701 else
703 d->template_code = template_code;
704 d->output_format = INSN_OUTPUT_FORMAT_SINGLE;
708 /* Check insn D for consistency in number of constraint alternatives. */
710 static void
711 validate_insn_alternatives (struct data *d)
713 int n = 0, start;
715 /* Make sure all the operands have the same number of alternatives
716 in their constraints. Let N be that number. */
717 for (start = 0; start < d->n_operands; start++)
718 if (d->operand[start].n_alternatives > 0)
720 int len, i;
721 const char *p;
722 char c;
723 int which_alternative = 0;
724 int alternative_count_unsure = 0;
726 for (p = d->operand[start].constraint; (c = *p); p += len)
728 #ifdef USE_MD_CONSTRAINTS
729 if (ISSPACE (c) || strchr (indep_constraints, c))
730 len = 1;
731 else if (ISDIGIT (c))
733 const char *q = p;
735 q++;
736 while (ISDIGIT (*q));
737 len = q - p;
739 else
740 len = mdep_constraint_len (p, d->lineno, start);
741 #else
742 len = CONSTRAINT_LEN (c, p);
744 if (len < 1 || (len > 1 && strchr (",#*+=&%!0123456789", c)))
746 error_with_line (d->lineno,
747 "invalid length %d for char '%c' in"
748 " alternative %d of operand %d",
749 len, c, which_alternative, start);
750 len = 1;
752 #endif
754 if (c == ',')
756 which_alternative++;
757 continue;
760 for (i = 1; i < len; i++)
761 if (p[i] == '\0')
763 error_with_line (d->lineno,
764 "NUL in alternative %d of operand %d",
765 which_alternative, start);
766 alternative_count_unsure = 1;
767 break;
769 else if (strchr (",#*", p[i]))
771 error_with_line (d->lineno,
772 "'%c' in alternative %d of operand %d",
773 p[i], which_alternative, start);
774 alternative_count_unsure = 1;
777 if (!alternative_count_unsure)
779 if (n == 0)
780 n = d->operand[start].n_alternatives;
781 else if (n != d->operand[start].n_alternatives)
782 error_with_line (d->lineno,
783 "wrong number of alternatives in operand %d",
784 start);
788 /* Record the insn's overall number of alternatives. */
789 d->n_alternatives = n;
792 /* Verify that there are no gaps in operand numbers for INSNs. */
794 static void
795 validate_insn_operands (struct data *d)
797 int i;
799 for (i = 0; i < d->n_operands; ++i)
800 if (d->operand[i].seen == 0)
801 error_with_line (d->lineno, "missing operand %d", i);
804 static void
805 validate_optab_operands (struct data *d)
807 if (!d->name || d->name[0] == '\0' || d->name[0] == '*')
808 return;
810 /* Miscellaneous tests. */
811 if (strncmp (d->name, "cstore", 6) == 0
812 && d->name[strlen (d->name) - 1] == '4'
813 && d->operand[0].mode == VOIDmode)
815 message_with_line (d->lineno, "missing mode for operand 0 of cstore");
816 have_error = 1;
820 /* Look at a define_insn just read. Assign its code number. Record
821 on idata the template and the number of arguments. If the insn has
822 a hairy output action, output a function for now. */
824 static void
825 gen_insn (rtx insn, int lineno)
827 struct pattern_stats stats;
828 struct data *d = XNEW (struct data);
829 int i;
831 d->code_number = next_code_number;
832 d->index_number = next_index_number;
833 d->filename = read_md_filename;
834 d->lineno = lineno;
835 if (XSTR (insn, 0)[0])
836 d->name = XSTR (insn, 0);
837 else
838 d->name = 0;
840 /* Build up the list in the same order as the insns are seen
841 in the machine description. */
842 d->next = 0;
843 *idata_end = d;
844 idata_end = &d->next;
846 memset (d->operand, 0, sizeof (d->operand));
848 for (i = 0; i < XVECLEN (insn, 1); i++)
849 scan_operands (d, XVECEXP (insn, 1, i), 0, 0);
851 get_pattern_stats (&stats, XVEC (insn, 1));
852 d->n_generator_args = stats.num_generator_args;
853 d->n_operands = stats.num_insn_operands;
854 d->n_dups = stats.num_dups;
856 #ifndef USE_MD_CONSTRAINTS
857 check_constraint_len ();
858 #endif
859 validate_insn_operands (d);
860 validate_insn_alternatives (d);
861 validate_optab_operands (d);
862 place_operands (d);
863 process_template (d, XTMPL (insn, 3));
866 /* Look at a define_peephole just read. Assign its code number.
867 Record on idata the template and the number of arguments.
868 If the insn has a hairy output action, output it now. */
870 static void
871 gen_peephole (rtx peep, int lineno)
873 struct pattern_stats stats;
874 struct data *d = XNEW (struct data);
875 int i;
877 d->code_number = next_code_number;
878 d->index_number = next_index_number;
879 d->filename = read_md_filename;
880 d->lineno = lineno;
881 d->name = 0;
883 /* Build up the list in the same order as the insns are seen
884 in the machine description. */
885 d->next = 0;
886 *idata_end = d;
887 idata_end = &d->next;
889 memset (d->operand, 0, sizeof (d->operand));
891 /* Get the number of operands by scanning all the patterns of the
892 peephole optimizer. But ignore all the rest of the information
893 thus obtained. */
894 for (i = 0; i < XVECLEN (peep, 0); i++)
895 scan_operands (d, XVECEXP (peep, 0, i), 0, 0);
897 get_pattern_stats (&stats, XVEC (peep, 0));
898 d->n_generator_args = 0;
899 d->n_operands = stats.num_insn_operands;
900 d->n_dups = 0;
902 validate_insn_alternatives (d);
903 place_operands (d);
904 process_template (d, XTMPL (peep, 2));
907 /* Process a define_expand just read. Assign its code number,
908 only for the purposes of `insn_gen_function'. */
910 static void
911 gen_expand (rtx insn, int lineno)
913 struct pattern_stats stats;
914 struct data *d = XNEW (struct data);
915 int i;
917 d->code_number = next_code_number;
918 d->index_number = next_index_number;
919 d->filename = read_md_filename;
920 d->lineno = lineno;
921 if (XSTR (insn, 0)[0])
922 d->name = XSTR (insn, 0);
923 else
924 d->name = 0;
926 /* Build up the list in the same order as the insns are seen
927 in the machine description. */
928 d->next = 0;
929 *idata_end = d;
930 idata_end = &d->next;
932 memset (d->operand, 0, sizeof (d->operand));
934 /* Scan the operands to get the specified predicates and modes,
935 since expand_binop needs to know them. */
937 if (XVEC (insn, 1))
938 for (i = 0; i < XVECLEN (insn, 1); i++)
939 scan_operands (d, XVECEXP (insn, 1, i), 0, 0);
941 get_pattern_stats (&stats, XVEC (insn, 1));
942 d->n_generator_args = stats.num_generator_args;
943 d->n_operands = stats.num_insn_operands;
944 d->n_dups = stats.num_dups;
945 d->template_code = 0;
946 d->output_format = INSN_OUTPUT_FORMAT_NONE;
948 validate_insn_alternatives (d);
949 validate_optab_operands (d);
950 place_operands (d);
953 /* Process a define_split just read. Assign its code number,
954 only for reasons of consistency and to simplify genrecog. */
956 static void
957 gen_split (rtx split, int lineno)
959 struct pattern_stats stats;
960 struct data *d = XNEW (struct data);
961 int i;
963 d->code_number = next_code_number;
964 d->index_number = next_index_number;
965 d->filename = read_md_filename;
966 d->lineno = lineno;
967 d->name = 0;
969 /* Build up the list in the same order as the insns are seen
970 in the machine description. */
971 d->next = 0;
972 *idata_end = d;
973 idata_end = &d->next;
975 memset (d->operand, 0, sizeof (d->operand));
977 /* Get the number of operands by scanning all the patterns of the
978 split patterns. But ignore all the rest of the information thus
979 obtained. */
980 for (i = 0; i < XVECLEN (split, 0); i++)
981 scan_operands (d, XVECEXP (split, 0, i), 0, 0);
983 get_pattern_stats (&stats, XVEC (split, 0));
984 d->n_generator_args = 0;
985 d->n_operands = stats.num_insn_operands;
986 d->n_dups = 0;
987 d->n_alternatives = 0;
988 d->template_code = 0;
989 d->output_format = INSN_OUTPUT_FORMAT_NONE;
991 place_operands (d);
994 extern int main (int, char **);
997 main (int argc, char **argv)
999 rtx desc;
1001 progname = "genoutput";
1003 if (!init_rtx_reader_args (argc, argv))
1004 return (FATAL_EXIT_CODE);
1006 output_prologue ();
1007 next_code_number = 0;
1008 next_index_number = 0;
1010 /* Read the machine description. */
1012 while (1)
1014 int line_no;
1016 desc = read_md_rtx (&line_no, &next_code_number);
1017 if (desc == NULL)
1018 break;
1020 switch (GET_CODE (desc))
1022 case DEFINE_INSN:
1023 gen_insn (desc, line_no);
1024 break;
1026 case DEFINE_PEEPHOLE:
1027 gen_peephole (desc, line_no);
1028 break;
1030 case DEFINE_EXPAND:
1031 gen_expand (desc, line_no);
1032 break;
1034 case DEFINE_SPLIT:
1035 case DEFINE_PEEPHOLE2:
1036 gen_split (desc, line_no);
1037 break;
1039 #ifdef USE_MD_CONSTRAINTS
1040 case DEFINE_CONSTRAINT:
1041 case DEFINE_REGISTER_CONSTRAINT:
1042 case DEFINE_ADDRESS_CONSTRAINT:
1043 case DEFINE_MEMORY_CONSTRAINT:
1044 note_constraint (desc, line_no);
1045 break;
1046 #endif
1048 default:
1049 break;
1051 next_index_number++;
1054 printf("\n\n");
1055 output_operand_data ();
1056 output_insn_data ();
1057 output_get_insn_name ();
1059 fflush (stdout);
1060 return (ferror (stdout) != 0 || have_error
1061 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
1064 /* Return the number of occurrences of character C in string S or
1065 -1 if S is the null string. */
1067 static int
1068 n_occurrences (int c, const char *s)
1070 int n = 0;
1072 if (s == 0 || *s == '\0')
1073 return -1;
1075 while (*s)
1076 n += (*s++ == c);
1078 return n;
1081 /* Remove whitespace in `s' by moving up characters until the end.
1082 Return a new string. */
1084 static const char *
1085 strip_whitespace (const char *s)
1087 char *p, *q;
1088 char ch;
1090 if (s == 0)
1091 return 0;
1093 p = q = XNEWVEC (char, strlen (s) + 1);
1094 while ((ch = *s++) != '\0')
1095 if (! ISSPACE (ch))
1096 *p++ = ch;
1098 *p = '\0';
1099 return q;
1102 #ifdef USE_MD_CONSTRAINTS
1104 /* Record just enough information about a constraint to allow checking
1105 of operand constraint strings above, in validate_insn_alternatives.
1106 Does not validate most properties of the constraint itself; does
1107 enforce no duplicate names, no overlap with MI constraints, and no
1108 prefixes. EXP is the define_*constraint form, LINENO the line number
1109 reported by the reader. */
1110 static void
1111 note_constraint (rtx exp, int lineno)
1113 const char *name = XSTR (exp, 0);
1114 unsigned int namelen = strlen (name);
1115 struct constraint_data **iter, **slot, *new_cdata;
1117 /* The 'm' constraint is special here since that constraint letter
1118 can be overridden by the back end by defining the
1119 TARGET_MEM_CONSTRAINT macro. */
1120 if (strchr (indep_constraints, name[0]) && name[0] != 'm')
1122 if (name[1] == '\0')
1123 error_with_line (lineno, "constraint letter '%s' cannot be "
1124 "redefined by the machine description", name);
1125 else
1126 error_with_line (lineno, "constraint name '%s' cannot be defined by "
1127 "the machine description, as it begins with '%c'",
1128 name, name[0]);
1129 return;
1132 slot = &constraints_by_letter_table[(unsigned int)name[0]];
1133 for (iter = slot; *iter; iter = &(*iter)->next_this_letter)
1135 /* This causes slot to end up pointing to the
1136 next_this_letter field of the last constraint with a name
1137 of equal or greater length than the new constraint; hence
1138 the new constraint will be inserted after all previous
1139 constraints with names of the same length. */
1140 if ((*iter)->namelen >= namelen)
1141 slot = iter;
1143 if (!strcmp ((*iter)->name, name))
1145 error_with_line (lineno, "redefinition of constraint '%s'", name);
1146 message_with_line ((*iter)->lineno, "previous definition is here");
1147 return;
1149 else if (!strncmp ((*iter)->name, name, (*iter)->namelen))
1151 error_with_line (lineno, "defining constraint '%s' here", name);
1152 message_with_line ((*iter)->lineno, "renders constraint '%s' "
1153 "(defined here) a prefix", (*iter)->name);
1154 return;
1156 else if (!strncmp ((*iter)->name, name, namelen))
1158 error_with_line (lineno, "constraint '%s' is a prefix", name);
1159 message_with_line ((*iter)->lineno, "of constraint '%s' "
1160 "(defined here)", (*iter)->name);
1161 return;
1164 new_cdata = XNEWVAR (struct constraint_data, sizeof (struct constraint_data) + namelen);
1165 strcpy ((char *)new_cdata + offsetof(struct constraint_data, name), name);
1166 new_cdata->namelen = namelen;
1167 new_cdata->lineno = lineno;
1168 new_cdata->next_this_letter = *slot;
1169 *slot = new_cdata;
1172 /* Return the length of the constraint name beginning at position S
1173 of an operand constraint string, or issue an error message if there
1174 is no such constraint. Does not expect to be called for generic
1175 constraints. */
1176 static int
1177 mdep_constraint_len (const char *s, int lineno, int opno)
1179 struct constraint_data *p;
1181 p = constraints_by_letter_table[(unsigned int)s[0]];
1183 if (p)
1184 for (; p; p = p->next_this_letter)
1185 if (!strncmp (s, p->name, p->namelen))
1186 return p->namelen;
1188 error_with_line (lineno,
1189 "error: undefined machine-specific constraint "
1190 "at this point: \"%s\"", s);
1191 message_with_line (lineno, "note: in operand %d", opno);
1192 return 1; /* safe */
1195 #else
1196 /* Verify that DEFAULT_CONSTRAINT_LEN is used properly and not
1197 tampered with. This isn't bullet-proof, but it should catch
1198 most genuine mistakes. */
1199 static void
1200 check_constraint_len (void)
1202 const char *p;
1203 int d;
1205 for (p = ",#*+=&%!1234567890"; *p; p++)
1206 for (d = -9; d < 9; d++)
1207 gcc_assert (constraint_len (p, d) == d);
1210 static int
1211 constraint_len (const char *p, int genoutput_default_constraint_len)
1213 /* Check that we still match defaults.h . First we do a generation-time
1214 check that fails if the value is not the expected one... */
1215 gcc_assert (DEFAULT_CONSTRAINT_LEN (*p, p) == 1);
1216 /* And now a compile-time check that should give a diagnostic if the
1217 definition doesn't exactly match. */
1218 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
1219 /* Now re-define DEFAULT_CONSTRAINT_LEN so that we can verify it is
1220 being used. */
1221 #undef DEFAULT_CONSTRAINT_LEN
1222 #define DEFAULT_CONSTRAINT_LEN(C,STR) \
1223 ((C) != *p || STR != p ? -1 : genoutput_default_constraint_len)
1224 return CONSTRAINT_LEN (*p, p);
1225 /* And set it back. */
1226 #undef DEFAULT_CONSTRAINT_LEN
1227 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
1229 #endif