svn merge -r 217500:218679 svn+ssh://gcc.gnu.org/svn/gcc/trunk
[official-gcc.git] / gcc / genemit.c
blob5f30f4223afa2efba770ab884cea2197196aa41c
1 /* Generate code from machine description to emit insns as rtl.
2 Copyright (C) 1987-2014 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
21 #include "bconfig.h"
22 #include "system.h"
23 #include "coretypes.h"
24 #include "tm.h"
25 #include "rtl.h"
26 #include "errors.h"
27 #include "read-md.h"
28 #include "gensupport.h"
31 static int insn_code_number;
32 static int insn_index_number;
34 /* Data structure for recording the patterns of insns that have CLOBBERs.
35 We use this to output a function that adds these CLOBBERs to a
36 previously-allocated PARALLEL expression. */
38 struct clobber_pat
40 struct clobber_ent *insns;
41 rtx pattern;
42 int first_clobber;
43 struct clobber_pat *next;
44 int has_hard_reg;
45 } *clobber_list;
47 /* Records one insn that uses the clobber list. */
49 struct clobber_ent
51 int code_number; /* Counts only insns. */
52 struct clobber_ent *next;
55 static void print_code (RTX_CODE);
56 static void gen_exp (rtx, enum rtx_code, char *);
57 static void gen_insn (rtx, int);
58 static void gen_expand (rtx);
59 static void gen_split (rtx);
60 static void output_add_clobbers (void);
61 static void output_added_clobbers_hard_reg_p (void);
62 static void gen_rtx_scratch (rtx, enum rtx_code);
63 static void output_peephole2_scratches (rtx);
66 static void
67 print_code (RTX_CODE code)
69 const char *p1;
70 for (p1 = GET_RTX_NAME (code); *p1; p1++)
71 putchar (TOUPPER (*p1));
74 static void
75 gen_rtx_scratch (rtx x, enum rtx_code subroutine_type)
77 if (subroutine_type == DEFINE_PEEPHOLE2)
79 printf ("operand%d", XINT (x, 0));
81 else
83 printf ("gen_rtx_SCRATCH (%smode)", GET_MODE_NAME (GET_MODE (x)));
87 /* Print a C expression to construct an RTX just like X,
88 substituting any operand references appearing within. */
90 static void
91 gen_exp (rtx x, enum rtx_code subroutine_type, char *used)
93 RTX_CODE code;
94 int i;
95 int len;
96 const char *fmt;
98 if (x == 0)
100 printf ("NULL_RTX");
101 return;
104 code = GET_CODE (x);
106 switch (code)
108 case MATCH_OPERAND:
109 case MATCH_DUP:
110 if (used)
112 if (used[XINT (x, 0)])
114 printf ("copy_rtx (operand%d)", XINT (x, 0));
115 return;
117 used[XINT (x, 0)] = 1;
119 printf ("operand%d", XINT (x, 0));
120 return;
122 case MATCH_OP_DUP:
123 printf ("gen_rtx_fmt_");
124 for (i = 0; i < XVECLEN (x, 1); i++)
125 printf ("e");
126 printf (" (GET_CODE (operand%d), ", XINT (x, 0));
127 if (GET_MODE (x) == VOIDmode)
128 printf ("GET_MODE (operand%d)", XINT (x, 0));
129 else
130 printf ("%smode", GET_MODE_NAME (GET_MODE (x)));
131 for (i = 0; i < XVECLEN (x, 1); i++)
133 printf (",\n\t\t");
134 gen_exp (XVECEXP (x, 1, i), subroutine_type, used);
136 printf (")");
137 return;
139 case MATCH_OPERATOR:
140 printf ("gen_rtx_fmt_");
141 for (i = 0; i < XVECLEN (x, 2); i++)
142 printf ("e");
143 printf (" (GET_CODE (operand%d)", XINT (x, 0));
144 printf (", %smode", GET_MODE_NAME (GET_MODE (x)));
145 for (i = 0; i < XVECLEN (x, 2); i++)
147 printf (",\n\t\t");
148 gen_exp (XVECEXP (x, 2, i), subroutine_type, used);
150 printf (")");
151 return;
153 case MATCH_PARALLEL:
154 case MATCH_PAR_DUP:
155 printf ("operand%d", XINT (x, 0));
156 return;
158 case MATCH_SCRATCH:
159 gen_rtx_scratch (x, subroutine_type);
160 return;
162 case PC:
163 printf ("pc_rtx");
164 return;
165 case RETURN:
166 printf ("ret_rtx");
167 return;
168 case SIMPLE_RETURN:
169 printf ("simple_return_rtx");
170 return;
171 case CLOBBER:
172 if (REG_P (XEXP (x, 0)))
174 printf ("gen_hard_reg_clobber (%smode, %i)", GET_MODE_NAME (GET_MODE (XEXP (x, 0))),
175 REGNO (XEXP (x, 0)));
176 return;
178 break;
180 case CC0:
181 printf ("cc0_rtx");
182 return;
184 case CONST_INT:
185 if (INTVAL (x) == 0)
186 printf ("const0_rtx");
187 else if (INTVAL (x) == 1)
188 printf ("const1_rtx");
189 else if (INTVAL (x) == -1)
190 printf ("constm1_rtx");
191 else if (-MAX_SAVED_CONST_INT <= INTVAL (x)
192 && INTVAL (x) <= MAX_SAVED_CONST_INT)
193 printf ("const_int_rtx[MAX_SAVED_CONST_INT + (%d)]",
194 (int) INTVAL (x));
195 else if (INTVAL (x) == STORE_FLAG_VALUE)
196 printf ("const_true_rtx");
197 else
199 printf ("GEN_INT (");
200 printf (HOST_WIDE_INT_PRINT_DEC_C, INTVAL (x));
201 printf (")");
203 return;
205 case CONST_DOUBLE:
206 case CONST_FIXED:
207 case CONST_WIDE_INT:
208 /* These shouldn't be written in MD files. Instead, the appropriate
209 routines in varasm.c should be called. */
210 gcc_unreachable ();
212 default:
213 break;
216 printf ("gen_rtx_");
217 print_code (code);
218 printf (" (%smode", GET_MODE_NAME (GET_MODE (x)));
220 fmt = GET_RTX_FORMAT (code);
221 len = GET_RTX_LENGTH (code);
222 for (i = 0; i < len; i++)
224 if (fmt[i] == '0')
225 break;
226 printf (",\n\t");
227 switch (fmt[i])
229 case 'e': case 'u':
230 gen_exp (XEXP (x, i), subroutine_type, used);
231 break;
233 case 'i':
234 printf ("%u", XINT (x, i));
235 break;
237 case 's':
238 printf ("\"%s\"", XSTR (x, i));
239 break;
241 case 'E':
243 int j;
244 printf ("gen_rtvec (%d", XVECLEN (x, i));
245 for (j = 0; j < XVECLEN (x, i); j++)
247 printf (",\n\t\t");
248 gen_exp (XVECEXP (x, i, j), subroutine_type, used);
250 printf (")");
251 break;
254 default:
255 gcc_unreachable ();
258 printf (")");
261 /* Generate the `gen_...' function for a DEFINE_INSN. */
263 static void
264 gen_insn (rtx insn, int lineno)
266 struct pattern_stats stats;
267 int i;
269 /* See if the pattern for this insn ends with a group of CLOBBERs of (hard)
270 registers or MATCH_SCRATCHes. If so, store away the information for
271 later. */
273 if (XVEC (insn, 1))
275 int has_hard_reg = 0;
277 for (i = XVECLEN (insn, 1) - 1; i > 0; i--)
279 if (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER)
280 break;
282 if (REG_P (XEXP (XVECEXP (insn, 1, i), 0)))
283 has_hard_reg = 1;
284 else if (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH)
285 break;
288 if (i != XVECLEN (insn, 1) - 1)
290 struct clobber_pat *p;
291 struct clobber_ent *link = XNEW (struct clobber_ent);
292 int j;
294 link->code_number = insn_code_number;
296 /* See if any previous CLOBBER_LIST entry is the same as this
297 one. */
299 for (p = clobber_list; p; p = p->next)
301 if (p->first_clobber != i + 1
302 || XVECLEN (p->pattern, 1) != XVECLEN (insn, 1))
303 continue;
305 for (j = i + 1; j < XVECLEN (insn, 1); j++)
307 rtx old_rtx = XEXP (XVECEXP (p->pattern, 1, j), 0);
308 rtx new_rtx = XEXP (XVECEXP (insn, 1, j), 0);
310 /* OLD and NEW_INSN are the same if both are to be a SCRATCH
311 of the same mode,
312 or if both are registers of the same mode and number. */
313 if (! (GET_MODE (old_rtx) == GET_MODE (new_rtx)
314 && ((GET_CODE (old_rtx) == MATCH_SCRATCH
315 && GET_CODE (new_rtx) == MATCH_SCRATCH)
316 || (REG_P (old_rtx) && REG_P (new_rtx)
317 && REGNO (old_rtx) == REGNO (new_rtx)))))
318 break;
321 if (j == XVECLEN (insn, 1))
322 break;
325 if (p == 0)
327 p = XNEW (struct clobber_pat);
329 p->insns = 0;
330 p->pattern = insn;
331 p->first_clobber = i + 1;
332 p->next = clobber_list;
333 p->has_hard_reg = has_hard_reg;
334 clobber_list = p;
337 link->next = p->insns;
338 p->insns = link;
342 /* Don't mention instructions whose names are the null string
343 or begin with '*'. They are in the machine description just
344 to be recognized. */
345 if (XSTR (insn, 0)[0] == 0 || XSTR (insn, 0)[0] == '*')
346 return;
348 printf ("/* %s:%d */\n", read_md_filename, lineno);
350 /* Find out how many operands this function has. */
351 get_pattern_stats (&stats, XVEC (insn, 1));
352 if (stats.max_dup_opno > stats.max_opno)
353 fatal ("match_dup operand number has no match_operand");
355 /* Output the function name and argument declarations. */
356 printf ("rtx\ngen_%s (", XSTR (insn, 0));
357 if (stats.num_generator_args)
358 for (i = 0; i < stats.num_generator_args; i++)
359 if (i)
360 printf (",\n\trtx operand%d ATTRIBUTE_UNUSED", i);
361 else
362 printf ("rtx operand%d ATTRIBUTE_UNUSED", i);
363 else
364 printf ("void");
365 printf (")\n");
366 printf ("{\n");
368 /* Output code to construct and return the rtl for the instruction body. */
370 if (XVECLEN (insn, 1) == 1)
372 printf (" return ");
373 gen_exp (XVECEXP (insn, 1, 0), DEFINE_INSN, NULL);
374 printf (";\n}\n\n");
376 else
378 char *used = XCNEWVEC (char, stats.num_generator_args);
380 printf (" return gen_rtx_PARALLEL (VOIDmode, gen_rtvec (%d",
381 XVECLEN (insn, 1));
383 for (i = 0; i < XVECLEN (insn, 1); i++)
385 printf (",\n\t\t");
386 gen_exp (XVECEXP (insn, 1, i), DEFINE_INSN, used);
388 printf ("));\n}\n\n");
389 XDELETEVEC (used);
393 /* Generate the `gen_...' function for a DEFINE_EXPAND. */
395 static void
396 gen_expand (rtx expand)
398 struct pattern_stats stats;
399 int i;
400 char *used;
402 if (strlen (XSTR (expand, 0)) == 0)
403 fatal ("define_expand lacks a name");
404 if (XVEC (expand, 1) == 0)
405 fatal ("define_expand for %s lacks a pattern", XSTR (expand, 0));
407 /* Find out how many operands this function has. */
408 get_pattern_stats (&stats, XVEC (expand, 1));
410 /* Output the function name and argument declarations. */
411 printf ("rtx\ngen_%s (", XSTR (expand, 0));
412 if (stats.num_generator_args)
413 for (i = 0; i < stats.num_generator_args; i++)
414 if (i)
415 printf (",\n\trtx operand%d", i);
416 else
417 printf ("rtx operand%d", i);
418 else
419 printf ("void");
420 printf (")\n");
421 printf ("{\n");
423 /* If we don't have any C code to write, only one insn is being written,
424 and no MATCH_DUPs are present, we can just return the desired insn
425 like we do for a DEFINE_INSN. This saves memory. */
426 if ((XSTR (expand, 3) == 0 || *XSTR (expand, 3) == '\0')
427 && stats.max_opno >= stats.max_dup_opno
428 && XVECLEN (expand, 1) == 1)
430 printf (" return ");
431 gen_exp (XVECEXP (expand, 1, 0), DEFINE_EXPAND, NULL);
432 printf (";\n}\n\n");
433 return;
436 /* For each operand referred to only with MATCH_DUPs,
437 make a local variable. */
438 for (i = stats.num_generator_args; i <= stats.max_dup_opno; i++)
439 printf (" rtx operand%d;\n", i);
440 for (; i <= stats.max_scratch_opno; i++)
441 printf (" rtx operand%d ATTRIBUTE_UNUSED;\n", i);
442 printf (" rtx _val = 0;\n");
443 printf (" start_sequence ();\n");
445 /* The fourth operand of DEFINE_EXPAND is some code to be executed
446 before the actual construction.
447 This code expects to refer to `operands'
448 just as the output-code in a DEFINE_INSN does,
449 but here `operands' is an automatic array.
450 So copy the operand values there before executing it. */
451 if (XSTR (expand, 3) && *XSTR (expand, 3))
453 printf (" {\n");
454 if (stats.num_operand_vars > 0)
455 printf (" rtx operands[%d];\n", stats.num_operand_vars);
457 /* Output code to copy the arguments into `operands'. */
458 for (i = 0; i < stats.num_generator_args; i++)
459 printf (" operands[%d] = operand%d;\n", i, i);
461 /* Output the special code to be executed before the sequence
462 is generated. */
463 print_md_ptr_loc (XSTR (expand, 3));
464 printf ("%s\n", XSTR (expand, 3));
466 /* Output code to copy the arguments back out of `operands'
467 (unless we aren't going to use them at all). */
468 if (XVEC (expand, 1) != 0)
470 for (i = 0; i < stats.num_operand_vars; i++)
472 printf (" operand%d = operands[%d];\n", i, i);
473 printf (" (void) operand%d;\n", i);
476 printf (" }\n");
479 /* Output code to construct the rtl for the instruction bodies.
480 Use emit_insn to add them to the sequence being accumulated.
481 But don't do this if the user's code has set `no_more' nonzero. */
483 used = XCNEWVEC (char, stats.num_operand_vars);
485 for (i = 0; i < XVECLEN (expand, 1); i++)
487 rtx next = XVECEXP (expand, 1, i);
488 if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC)
489 || (GET_CODE (next) == PARALLEL
490 && ((GET_CODE (XVECEXP (next, 0, 0)) == SET
491 && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC)
492 || ANY_RETURN_P (XVECEXP (next, 0, 0))))
493 || ANY_RETURN_P (next))
494 printf (" emit_jump_insn (");
495 else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL)
496 || GET_CODE (next) == CALL
497 || (GET_CODE (next) == PARALLEL
498 && GET_CODE (XVECEXP (next, 0, 0)) == SET
499 && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL)
500 || (GET_CODE (next) == PARALLEL
501 && GET_CODE (XVECEXP (next, 0, 0)) == CALL))
502 printf (" emit_call_insn (");
503 else if (LABEL_P (next))
504 printf (" emit_label (");
505 else if (GET_CODE (next) == MATCH_OPERAND
506 || GET_CODE (next) == MATCH_DUP
507 || GET_CODE (next) == MATCH_OPERATOR
508 || GET_CODE (next) == MATCH_OP_DUP
509 || GET_CODE (next) == MATCH_PARALLEL
510 || GET_CODE (next) == MATCH_PAR_DUP
511 || GET_CODE (next) == PARALLEL)
512 printf (" emit (");
513 else
514 printf (" emit_insn (");
515 gen_exp (next, DEFINE_EXPAND, used);
516 printf (");\n");
517 if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC
518 && GET_CODE (SET_SRC (next)) == LABEL_REF)
519 printf (" emit_barrier ();");
522 XDELETEVEC (used);
524 /* Call `get_insns' to extract the list of all the
525 insns emitted within this gen_... function. */
527 printf (" _val = get_insns ();\n");
528 printf (" end_sequence ();\n");
529 printf (" return _val;\n}\n\n");
532 /* Like gen_expand, but generates insns resulting from splitting SPLIT. */
534 static void
535 gen_split (rtx split)
537 struct pattern_stats stats;
538 int i;
539 const char *const name =
540 ((GET_CODE (split) == DEFINE_PEEPHOLE2) ? "peephole2" : "split");
541 const char *unused;
542 char *used;
544 if (XVEC (split, 0) == 0)
545 fatal ("define_%s (definition %d) lacks a pattern", name,
546 insn_index_number);
547 else if (XVEC (split, 2) == 0)
548 fatal ("define_%s (definition %d) lacks a replacement pattern", name,
549 insn_index_number);
551 /* Find out how many operands this function has. */
553 get_pattern_stats (&stats, XVEC (split, 2));
554 unused = (stats.num_operand_vars == 0 ? " ATTRIBUTE_UNUSED" : "");
555 used = XCNEWVEC (char, stats.num_operand_vars);
557 /* Output the prototype, function name and argument declarations. */
558 if (GET_CODE (split) == DEFINE_PEEPHOLE2)
560 printf ("extern rtx gen_%s_%d (rtx_insn *, rtx *);\n",
561 name, insn_code_number);
562 printf ("rtx\ngen_%s_%d (rtx_insn *curr_insn ATTRIBUTE_UNUSED, rtx *operands%s)\n",
563 name, insn_code_number, unused);
565 else
567 printf ("extern rtx gen_split_%d (rtx_insn *, rtx *);\n", insn_code_number);
568 printf ("rtx\ngen_split_%d (rtx_insn *curr_insn ATTRIBUTE_UNUSED, rtx *operands%s)\n",
569 insn_code_number, unused);
571 printf ("{\n");
573 /* Declare all local variables. */
574 for (i = 0; i < stats.num_operand_vars; i++)
575 printf (" rtx operand%d;\n", i);
576 printf (" rtx _val = 0;\n");
578 if (GET_CODE (split) == DEFINE_PEEPHOLE2)
579 output_peephole2_scratches (split);
581 printf (" if (dump_file)\n");
582 printf (" fprintf (dump_file, \"Splitting with gen_%s_%d\\n\");\n",
583 name, insn_code_number);
585 printf (" start_sequence ();\n");
587 /* The fourth operand of DEFINE_SPLIT is some code to be executed
588 before the actual construction. */
590 if (XSTR (split, 3))
592 print_md_ptr_loc (XSTR (split, 3));
593 printf ("%s\n", XSTR (split, 3));
596 /* Output code to copy the arguments back out of `operands' */
597 for (i = 0; i < stats.num_operand_vars; i++)
599 printf (" operand%d = operands[%d];\n", i, i);
600 printf (" (void) operand%d;\n", i);
603 /* Output code to construct the rtl for the instruction bodies.
604 Use emit_insn to add them to the sequence being accumulated.
605 But don't do this if the user's code has set `no_more' nonzero. */
607 for (i = 0; i < XVECLEN (split, 2); i++)
609 rtx next = XVECEXP (split, 2, i);
610 if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC)
611 || (GET_CODE (next) == PARALLEL
612 && GET_CODE (XVECEXP (next, 0, 0)) == SET
613 && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC)
614 || ANY_RETURN_P (next))
615 printf (" emit_jump_insn (");
616 else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL)
617 || GET_CODE (next) == CALL
618 || (GET_CODE (next) == PARALLEL
619 && GET_CODE (XVECEXP (next, 0, 0)) == SET
620 && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL)
621 || (GET_CODE (next) == PARALLEL
622 && GET_CODE (XVECEXP (next, 0, 0)) == CALL))
623 printf (" emit_call_insn (");
624 else if (LABEL_P (next))
625 printf (" emit_label (");
626 else if (GET_CODE (next) == MATCH_OPERAND
627 || GET_CODE (next) == MATCH_OPERATOR
628 || GET_CODE (next) == MATCH_PARALLEL
629 || GET_CODE (next) == MATCH_OP_DUP
630 || GET_CODE (next) == MATCH_DUP
631 || GET_CODE (next) == PARALLEL)
632 printf (" emit (");
633 else
634 printf (" emit_insn (");
635 gen_exp (next, GET_CODE (split), used);
636 printf (");\n");
637 if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC
638 && GET_CODE (SET_SRC (next)) == LABEL_REF)
639 printf (" emit_barrier ();");
642 /* Call `get_insns' to make a list of all the
643 insns emitted within this gen_... function. */
645 printf (" _val = get_insns ();\n");
646 printf (" end_sequence ();\n");
647 printf (" return _val;\n}\n\n");
649 free (used);
652 /* Write a function, `add_clobbers', that is given a PARALLEL of sufficient
653 size for the insn and an INSN_CODE, and inserts the required CLOBBERs at
654 the end of the vector. */
656 static void
657 output_add_clobbers (void)
659 struct clobber_pat *clobber;
660 struct clobber_ent *ent;
661 int i;
663 printf ("\n\nvoid\nadd_clobbers (rtx pattern ATTRIBUTE_UNUSED, int insn_code_number)\n");
664 printf ("{\n");
665 printf (" switch (insn_code_number)\n");
666 printf (" {\n");
668 for (clobber = clobber_list; clobber; clobber = clobber->next)
670 for (ent = clobber->insns; ent; ent = ent->next)
671 printf (" case %d:\n", ent->code_number);
673 for (i = clobber->first_clobber; i < XVECLEN (clobber->pattern, 1); i++)
675 printf (" XVECEXP (pattern, 0, %d) = ", i);
676 gen_exp (XVECEXP (clobber->pattern, 1, i),
677 GET_CODE (clobber->pattern), NULL);
678 printf (";\n");
681 printf (" break;\n\n");
684 printf (" default:\n");
685 printf (" gcc_unreachable ();\n");
686 printf (" }\n");
687 printf ("}\n");
690 /* Write a function, `added_clobbers_hard_reg_p' that is given an insn_code
691 number that will have clobbers added (as indicated by `recog') and returns
692 1 if those include a clobber of a hard reg or 0 if all of them just clobber
693 SCRATCH. */
695 static void
696 output_added_clobbers_hard_reg_p (void)
698 struct clobber_pat *clobber;
699 struct clobber_ent *ent;
700 int clobber_p, used;
702 printf ("\n\nint\nadded_clobbers_hard_reg_p (int insn_code_number)\n");
703 printf ("{\n");
704 printf (" switch (insn_code_number)\n");
705 printf (" {\n");
707 for (clobber_p = 0; clobber_p <= 1; clobber_p++)
709 used = 0;
710 for (clobber = clobber_list; clobber; clobber = clobber->next)
711 if (clobber->has_hard_reg == clobber_p)
712 for (ent = clobber->insns; ent; ent = ent->next)
714 printf (" case %d:\n", ent->code_number);
715 used++;
718 if (used)
719 printf (" return %d;\n\n", clobber_p);
722 printf (" default:\n");
723 printf (" gcc_unreachable ();\n");
724 printf (" }\n");
725 printf ("}\n");
728 /* Generate code to invoke find_free_register () as needed for the
729 scratch registers used by the peephole2 pattern in SPLIT. */
731 static void
732 output_peephole2_scratches (rtx split)
734 int i;
735 int insn_nr = 0;
736 bool first = true;
738 for (i = 0; i < XVECLEN (split, 0); i++)
740 rtx elt = XVECEXP (split, 0, i);
741 if (GET_CODE (elt) == MATCH_SCRATCH)
743 int last_insn_nr = insn_nr;
744 int cur_insn_nr = insn_nr;
745 int j;
746 for (j = i + 1; j < XVECLEN (split, 0); j++)
747 if (GET_CODE (XVECEXP (split, 0, j)) == MATCH_DUP)
749 if (XINT (XVECEXP (split, 0, j), 0) == XINT (elt, 0))
750 last_insn_nr = cur_insn_nr;
752 else if (GET_CODE (XVECEXP (split, 0, j)) != MATCH_SCRATCH)
753 cur_insn_nr++;
755 if (first)
757 printf (" HARD_REG_SET _regs_allocated;\n");
758 printf (" CLEAR_HARD_REG_SET (_regs_allocated);\n");
759 first = false;
762 printf (" if ((operands[%d] = peep2_find_free_register (%d, %d, \"%s\", %smode, &_regs_allocated)) == NULL_RTX)\n\
763 return NULL;\n",
764 XINT (elt, 0),
765 insn_nr, last_insn_nr,
766 XSTR (elt, 1),
767 GET_MODE_NAME (GET_MODE (elt)));
770 else if (GET_CODE (elt) != MATCH_DUP)
771 insn_nr++;
776 main (int argc, char **argv)
778 rtx desc;
780 progname = "genemit";
782 if (!init_rtx_reader_args (argc, argv))
783 return (FATAL_EXIT_CODE);
785 /* Assign sequential codes to all entries in the machine description
786 in parallel with the tables in insn-output.c. */
788 insn_code_number = 0;
789 insn_index_number = 0;
791 printf ("/* Generated automatically by the program `genemit'\n\
792 from the machine description file `md'. */\n\n");
794 printf ("#include \"config.h\"\n");
795 printf ("#include \"system.h\"\n");
796 printf ("#include \"coretypes.h\"\n");
797 printf ("#include \"tm.h\"\n");
798 printf ("#include \"tree.h\"\n");
799 printf ("#include \"varasm.h\"\n");
800 printf ("#include \"stor-layout.h\"\n");
801 printf ("#include \"calls.h\"\n");
802 printf ("#include \"rtl.h\"\n");
803 printf ("#include \"tm_p.h\"\n");
804 printf ("#include \"hashtab.h\"\n");
805 printf ("#include \"hash-set.h\"\n");
806 printf ("#include \"vec.h\"\n");
807 printf ("#include \"machmode.h\"\n");
808 printf ("#include \"hard-reg-set.h\"\n");
809 printf ("#include \"input.h\"\n");
810 printf ("#include \"function.h\"\n");
811 printf ("#include \"expr.h\"\n");
812 printf ("#include \"insn-codes.h\"\n");
813 printf ("#include \"optabs.h\"\n");
814 printf ("#include \"dfp.h\"\n");
815 printf ("#include \"flags.h\"\n");
816 printf ("#include \"output.h\"\n");
817 printf ("#include \"insn-config.h\"\n");
818 printf ("#include \"recog.h\"\n");
819 printf ("#include \"predict.h\"\n");
820 printf ("#include \"basic-block.h\"\n");
821 printf ("#include \"resource.h\"\n");
822 printf ("#include \"reload.h\"\n");
823 printf ("#include \"diagnostic-core.h\"\n");
824 printf ("#include \"regs.h\"\n");
825 printf ("#include \"tm-constrs.h\"\n");
826 printf ("#include \"ggc.h\"\n");
827 printf ("#include \"basic-block.h\"\n");
828 printf ("#include \"dumpfile.h\"\n");
829 printf ("#include \"target.h\"\n\n");
830 printf ("#define FAIL return (end_sequence (), _val)\n");
831 printf ("#define DONE return (_val = get_insns (), end_sequence (), _val)\n\n");
833 /* Read the machine description. */
835 while (1)
837 int line_no;
839 desc = read_md_rtx (&line_no, &insn_code_number);
840 if (desc == NULL)
841 break;
843 switch (GET_CODE (desc))
845 case DEFINE_INSN:
846 gen_insn (desc, line_no);
847 break;
849 case DEFINE_EXPAND:
850 printf ("/* %s:%d */\n", read_md_filename, line_no);
851 gen_expand (desc);
852 break;
854 case DEFINE_SPLIT:
855 printf ("/* %s:%d */\n", read_md_filename, line_no);
856 gen_split (desc);
857 break;
859 case DEFINE_PEEPHOLE2:
860 printf ("/* %s:%d */\n", read_md_filename, line_no);
861 gen_split (desc);
862 break;
864 default:
865 break;
867 ++insn_index_number;
870 /* Write out the routines to add CLOBBERs to a pattern and say whether they
871 clobber a hard reg. */
872 output_add_clobbers ();
873 output_added_clobbers_hard_reg_p ();
875 fflush (stdout);
876 return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);