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Commit | Line | Data |
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65963943 | 1 | /* Generate code from machine description to emit insns as rtl. |
cbe34bb5 | 2 | Copyright (C) 1987-2017 Free Software Foundation, Inc. |
65963943 | 3 | |
1322177d | 4 | This file is part of GCC. |
65963943 | 5 | |
1322177d LB |
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 | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 9 | version. |
65963943 | 10 | |
1322177d LB |
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. | |
65963943 RK |
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/>. */ | |
65963943 RK |
19 | |
20 | ||
4977bab6 | 21 | #include "bconfig.h" |
0b93b64e | 22 | #include "system.h" |
4977bab6 ZW |
23 | #include "coretypes.h" |
24 | #include "tm.h" | |
65963943 | 25 | #include "rtl.h" |
f8b6598e | 26 | #include "errors.h" |
10692477 | 27 | #include "read-md.h" |
c88c0d42 | 28 | #include "gensupport.h" |
65963943 | 29 | |
65963943 | 30 | |
65963943 | 31 | /* Data structure for recording the patterns of insns that have CLOBBERs. |
3d7aafde | 32 | We use this to output a function that adds these CLOBBERs to a |
65963943 RK |
33 | previously-allocated PARALLEL expression. */ |
34 | ||
35 | struct clobber_pat | |
36 | { | |
e5f6a288 | 37 | struct clobber_ent *insns; |
65963943 RK |
38 | rtx pattern; |
39 | int first_clobber; | |
40 | struct clobber_pat *next; | |
751aa7cc | 41 | int has_hard_reg; |
65963943 RK |
42 | } *clobber_list; |
43 | ||
e5f6a288 RK |
44 | /* Records one insn that uses the clobber list. */ |
45 | ||
46 | struct clobber_ent | |
47 | { | |
48 | int code_number; /* Counts only insns. */ | |
49 | struct clobber_ent *next; | |
50 | }; | |
51 | ||
3d7aafde | 52 | static void output_peephole2_scratches (rtx); |
e009aaf3 | 53 | |
886456e2 RS |
54 | /* True for <X>_optab if that optab isn't allowed to fail. */ |
55 | static bool nofail_optabs[NUM_OPTABS]; | |
65963943 RK |
56 | \f |
57 | static void | |
3d7aafde | 58 | print_code (RTX_CODE code) |
65963943 | 59 | { |
b3694847 | 60 | const char *p1; |
65963943 | 61 | for (p1 = GET_RTX_NAME (code); *p1; p1++) |
c3284718 | 62 | putchar (TOUPPER (*p1)); |
65963943 RK |
63 | } |
64 | ||
ede7cd44 | 65 | static void |
3d7aafde | 66 | gen_rtx_scratch (rtx x, enum rtx_code subroutine_type) |
ede7cd44 RH |
67 | { |
68 | if (subroutine_type == DEFINE_PEEPHOLE2) | |
69 | { | |
70 | printf ("operand%d", XINT (x, 0)); | |
71 | } | |
72 | else | |
73 | { | |
74 | printf ("gen_rtx_SCRATCH (%smode)", GET_MODE_NAME (GET_MODE (x))); | |
75 | } | |
76 | } | |
77 | ||
65963943 RK |
78 | /* Print a C expression to construct an RTX just like X, |
79 | substituting any operand references appearing within. */ | |
80 | ||
81 | static void | |
3d7aafde | 82 | gen_exp (rtx x, enum rtx_code subroutine_type, char *used) |
65963943 | 83 | { |
b3694847 SS |
84 | RTX_CODE code; |
85 | int i; | |
86 | int len; | |
87 | const char *fmt; | |
f7df4a84 | 88 | const char *sep = ""; |
65963943 RK |
89 | |
90 | if (x == 0) | |
91 | { | |
3d678dca | 92 | printf ("NULL_RTX"); |
65963943 RK |
93 | return; |
94 | } | |
95 | ||
96 | code = GET_CODE (x); | |
97 | ||
98 | switch (code) | |
99 | { | |
100 | case MATCH_OPERAND: | |
101 | case MATCH_DUP: | |
ab55f58c RH |
102 | if (used) |
103 | { | |
104 | if (used[XINT (x, 0)]) | |
105 | { | |
106 | printf ("copy_rtx (operand%d)", XINT (x, 0)); | |
107 | return; | |
108 | } | |
109 | used[XINT (x, 0)] = 1; | |
110 | } | |
65963943 RK |
111 | printf ("operand%d", XINT (x, 0)); |
112 | return; | |
113 | ||
114 | case MATCH_OP_DUP: | |
600555f5 KH |
115 | printf ("gen_rtx_fmt_"); |
116 | for (i = 0; i < XVECLEN (x, 1); i++) | |
117 | printf ("e"); | |
118 | printf (" (GET_CODE (operand%d), ", XINT (x, 0)); | |
4ceb7595 JC |
119 | if (GET_MODE (x) == VOIDmode) |
120 | printf ("GET_MODE (operand%d)", XINT (x, 0)); | |
121 | else | |
122 | printf ("%smode", GET_MODE_NAME (GET_MODE (x))); | |
65963943 RK |
123 | for (i = 0; i < XVECLEN (x, 1); i++) |
124 | { | |
125 | printf (",\n\t\t"); | |
ab55f58c | 126 | gen_exp (XVECEXP (x, 1, i), subroutine_type, used); |
65963943 RK |
127 | } |
128 | printf (")"); | |
129 | return; | |
130 | ||
131 | case MATCH_OPERATOR: | |
600555f5 KH |
132 | printf ("gen_rtx_fmt_"); |
133 | for (i = 0; i < XVECLEN (x, 2); i++) | |
134 | printf ("e"); | |
135 | printf (" (GET_CODE (operand%d)", XINT (x, 0)); | |
65963943 RK |
136 | printf (", %smode", GET_MODE_NAME (GET_MODE (x))); |
137 | for (i = 0; i < XVECLEN (x, 2); i++) | |
138 | { | |
139 | printf (",\n\t\t"); | |
ab55f58c | 140 | gen_exp (XVECEXP (x, 2, i), subroutine_type, used); |
65963943 RK |
141 | } |
142 | printf (")"); | |
143 | return; | |
144 | ||
145 | case MATCH_PARALLEL: | |
8fabbfe6 | 146 | case MATCH_PAR_DUP: |
65963943 RK |
147 | printf ("operand%d", XINT (x, 0)); |
148 | return; | |
149 | ||
150 | case MATCH_SCRATCH: | |
ede7cd44 | 151 | gen_rtx_scratch (x, subroutine_type); |
65963943 RK |
152 | return; |
153 | ||
65963943 RK |
154 | case PC: |
155 | printf ("pc_rtx"); | |
156 | return; | |
3810076b BS |
157 | case RETURN: |
158 | printf ("ret_rtx"); | |
159 | return; | |
26898771 BS |
160 | case SIMPLE_RETURN: |
161 | printf ("simple_return_rtx"); | |
162 | return; | |
3e89ed8d JH |
163 | case CLOBBER: |
164 | if (REG_P (XEXP (x, 0))) | |
165 | { | |
166 | printf ("gen_hard_reg_clobber (%smode, %i)", GET_MODE_NAME (GET_MODE (XEXP (x, 0))), | |
167 | REGNO (XEXP (x, 0))); | |
168 | return; | |
169 | } | |
170 | break; | |
65963943 RK |
171 | |
172 | case CC0: | |
173 | printf ("cc0_rtx"); | |
174 | return; | |
175 | ||
176 | case CONST_INT: | |
177 | if (INTVAL (x) == 0) | |
3d678dca RS |
178 | printf ("const0_rtx"); |
179 | else if (INTVAL (x) == 1) | |
180 | printf ("const1_rtx"); | |
181 | else if (INTVAL (x) == -1) | |
182 | printf ("constm1_rtx"); | |
11b635fe | 183 | else if (-MAX_SAVED_CONST_INT <= INTVAL (x) |
3e3b8d63 | 184 | && INTVAL (x) <= MAX_SAVED_CONST_INT) |
11b635fe KH |
185 | printf ("const_int_rtx[MAX_SAVED_CONST_INT + (%d)]", |
186 | (int) INTVAL (x)); | |
12651878 | 187 | else if (INTVAL (x) == STORE_FLAG_VALUE) |
3d678dca RS |
188 | printf ("const_true_rtx"); |
189 | else | |
76d31c63 JL |
190 | { |
191 | printf ("GEN_INT ("); | |
bb9b3805 | 192 | printf (HOST_WIDE_INT_PRINT_DEC_C, INTVAL (x)); |
76d31c63 JL |
193 | printf (")"); |
194 | } | |
3d678dca RS |
195 | return; |
196 | ||
197 | case CONST_DOUBLE: | |
091a3ac7 | 198 | case CONST_FIXED: |
807e902e | 199 | case CONST_WIDE_INT: |
3d678dca RS |
200 | /* These shouldn't be written in MD files. Instead, the appropriate |
201 | routines in varasm.c should be called. */ | |
b2d59f6f | 202 | gcc_unreachable (); |
1d300e19 KG |
203 | |
204 | default: | |
205 | break; | |
65963943 RK |
206 | } |
207 | ||
3b80f6ca | 208 | printf ("gen_rtx_"); |
65963943 | 209 | print_code (code); |
f7df4a84 RS |
210 | printf (" ("); |
211 | if (!always_void_p (code)) | |
212 | { | |
213 | printf ("%smode", GET_MODE_NAME (GET_MODE (x))); | |
214 | sep = ",\n\t"; | |
215 | } | |
65963943 RK |
216 | |
217 | fmt = GET_RTX_FORMAT (code); | |
218 | len = GET_RTX_LENGTH (code); | |
219 | for (i = 0; i < len; i++) | |
220 | { | |
221 | if (fmt[i] == '0') | |
222 | break; | |
f7df4a84 | 223 | fputs (sep, stdout); |
b2d59f6f | 224 | switch (fmt[i]) |
65963943 | 225 | { |
b2d59f6f NS |
226 | case 'e': case 'u': |
227 | gen_exp (XEXP (x, i), subroutine_type, used); | |
228 | break; | |
229 | ||
230 | case 'i': | |
231 | printf ("%u", XINT (x, i)); | |
232 | break; | |
233 | ||
9fccb335 RS |
234 | case 'r': |
235 | printf ("%u", REGNO (x)); | |
236 | break; | |
237 | ||
91914e56 RS |
238 | case 'p': |
239 | /* We don't have a way of parsing polynomial offsets yet, | |
240 | and hopefully never will. */ | |
241 | printf ("%d", SUBREG_BYTE (x).to_constant ()); | |
242 | break; | |
243 | ||
b2d59f6f NS |
244 | case 's': |
245 | printf ("\"%s\"", XSTR (x, i)); | |
246 | break; | |
247 | ||
248 | case 'E': | |
249 | { | |
250 | int j; | |
251 | printf ("gen_rtvec (%d", XVECLEN (x, i)); | |
252 | for (j = 0; j < XVECLEN (x, i); j++) | |
253 | { | |
254 | printf (",\n\t\t"); | |
255 | gen_exp (XVECEXP (x, i, j), subroutine_type, used); | |
256 | } | |
257 | printf (")"); | |
258 | break; | |
259 | } | |
260 | ||
261 | default: | |
262 | gcc_unreachable (); | |
65963943 | 263 | } |
f7df4a84 | 264 | sep = ",\n\t"; |
65963943 RK |
265 | } |
266 | printf (")"); | |
3d7aafde | 267 | } |
3beaff21 RS |
268 | |
269 | /* Output code to emit the instruction patterns in VEC, with each element | |
270 | becoming a separate instruction. USED is as for gen_exp. */ | |
271 | ||
272 | static void | |
273 | gen_emit_seq (rtvec vec, char *used) | |
274 | { | |
275 | for (int i = 0, len = GET_NUM_ELEM (vec); i < len; ++i) | |
276 | { | |
9d8895c9 | 277 | bool last_p = (i == len - 1); |
3beaff21 | 278 | rtx next = RTVEC_ELT (vec, i); |
9d8895c9 RS |
279 | if (const char *name = get_emit_function (next)) |
280 | { | |
281 | printf (" %s (", name); | |
282 | gen_exp (next, DEFINE_EXPAND, used); | |
283 | printf (");\n"); | |
284 | if (!last_p && needs_barrier_p (next)) | |
285 | printf (" emit_barrier ();"); | |
286 | } | |
287 | else | |
288 | { | |
289 | printf (" emit ("); | |
290 | gen_exp (next, DEFINE_EXPAND, used); | |
291 | printf (", %s);\n", last_p ? "false" : "true"); | |
292 | } | |
3beaff21 RS |
293 | } |
294 | } | |
65963943 | 295 | \f |
886456e2 RS |
296 | /* Emit the given C code to the output file. The code is allowed to |
297 | fail if CAN_FAIL_P. NAME describes what we're generating, | |
298 | for use in error messages. */ | |
299 | ||
300 | static void | |
301 | emit_c_code (const char *code, bool can_fail_p, const char *name) | |
302 | { | |
303 | if (can_fail_p) | |
304 | printf ("#define FAIL return (end_sequence (), _val)\n"); | |
305 | else | |
306 | printf ("#define FAIL _Pragma (\"GCC error \\\"%s cannot FAIL\\\"\")" | |
307 | " (void)0\n", name); | |
308 | printf ("#define DONE return (_val = get_insns ()," | |
309 | "end_sequence (), _val)\n"); | |
310 | ||
b78027d1 | 311 | rtx_reader_ptr->print_md_ptr_loc (code); |
886456e2 RS |
312 | printf ("%s\n", code); |
313 | ||
314 | printf ("#undef DONE\n"); | |
315 | printf ("#undef FAIL\n"); | |
316 | } | |
317 | \f | |
65963943 RK |
318 | /* Generate the `gen_...' function for a DEFINE_INSN. */ |
319 | ||
320 | static void | |
5d2d3e43 | 321 | gen_insn (md_rtx_info *info) |
65963943 | 322 | { |
e792559a | 323 | struct pattern_stats stats; |
b3694847 | 324 | int i; |
65963943 RK |
325 | |
326 | /* See if the pattern for this insn ends with a group of CLOBBERs of (hard) | |
327 | registers or MATCH_SCRATCHes. If so, store away the information for | |
0f41302f | 328 | later. */ |
65963943 | 329 | |
5d2d3e43 | 330 | rtx insn = info->def; |
65963943 RK |
331 | if (XVEC (insn, 1)) |
332 | { | |
751aa7cc RK |
333 | int has_hard_reg = 0; |
334 | ||
65963943 | 335 | for (i = XVECLEN (insn, 1) - 1; i > 0; i--) |
751aa7cc RK |
336 | { |
337 | if (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER) | |
338 | break; | |
339 | ||
f8cfc6aa | 340 | if (REG_P (XEXP (XVECEXP (insn, 1, i), 0))) |
751aa7cc RK |
341 | has_hard_reg = 1; |
342 | else if (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH) | |
343 | break; | |
344 | } | |
65963943 RK |
345 | |
346 | if (i != XVECLEN (insn, 1) - 1) | |
347 | { | |
b3694847 | 348 | struct clobber_pat *p; |
5ed6ace5 | 349 | struct clobber_ent *link = XNEW (struct clobber_ent); |
b3694847 | 350 | int j; |
e5f6a288 | 351 | |
5d2d3e43 | 352 | link->code_number = info->index; |
e5f6a288 RK |
353 | |
354 | /* See if any previous CLOBBER_LIST entry is the same as this | |
355 | one. */ | |
356 | ||
357 | for (p = clobber_list; p; p = p->next) | |
358 | { | |
359 | if (p->first_clobber != i + 1 | |
360 | || XVECLEN (p->pattern, 1) != XVECLEN (insn, 1)) | |
361 | continue; | |
362 | ||
363 | for (j = i + 1; j < XVECLEN (insn, 1); j++) | |
364 | { | |
8ad97cfc KG |
365 | rtx old_rtx = XEXP (XVECEXP (p->pattern, 1, j), 0); |
366 | rtx new_rtx = XEXP (XVECEXP (insn, 1, j), 0); | |
e5f6a288 | 367 | |
8ad97cfc | 368 | /* OLD and NEW_INSN are the same if both are to be a SCRATCH |
3d7aafde | 369 | of the same mode, |
e5f6a288 | 370 | or if both are registers of the same mode and number. */ |
8ad97cfc KG |
371 | if (! (GET_MODE (old_rtx) == GET_MODE (new_rtx) |
372 | && ((GET_CODE (old_rtx) == MATCH_SCRATCH | |
373 | && GET_CODE (new_rtx) == MATCH_SCRATCH) | |
374 | || (REG_P (old_rtx) && REG_P (new_rtx) | |
375 | && REGNO (old_rtx) == REGNO (new_rtx))))) | |
e5f6a288 RK |
376 | break; |
377 | } | |
3d7aafde | 378 | |
e5f6a288 RK |
379 | if (j == XVECLEN (insn, 1)) |
380 | break; | |
381 | } | |
382 | ||
383 | if (p == 0) | |
384 | { | |
5ed6ace5 | 385 | p = XNEW (struct clobber_pat); |
3d7aafde | 386 | |
e5f6a288 RK |
387 | p->insns = 0; |
388 | p->pattern = insn; | |
389 | p->first_clobber = i + 1; | |
390 | p->next = clobber_list; | |
751aa7cc | 391 | p->has_hard_reg = has_hard_reg; |
e5f6a288 RK |
392 | clobber_list = p; |
393 | } | |
394 | ||
395 | link->next = p->insns; | |
396 | p->insns = link; | |
65963943 RK |
397 | } |
398 | } | |
399 | ||
6b6ca844 RK |
400 | /* Don't mention instructions whose names are the null string |
401 | or begin with '*'. They are in the machine description just | |
402 | to be recognized. */ | |
403 | if (XSTR (insn, 0)[0] == 0 || XSTR (insn, 0)[0] == '*') | |
65963943 RK |
404 | return; |
405 | ||
5d2d3e43 | 406 | printf ("/* %s:%d */\n", info->loc.filename, info->loc.lineno); |
821e35ba | 407 | |
85a45cbb | 408 | /* Find out how many operands this function has. */ |
e792559a RS |
409 | get_pattern_stats (&stats, XVEC (insn, 1)); |
410 | if (stats.max_dup_opno > stats.max_opno) | |
5d2d3e43 | 411 | fatal_at (info->loc, "match_dup operand number has no match_operand"); |
65963943 RK |
412 | |
413 | /* Output the function name and argument declarations. */ | |
414 | printf ("rtx\ngen_%s (", XSTR (insn, 0)); | |
e792559a RS |
415 | if (stats.num_generator_args) |
416 | for (i = 0; i < stats.num_generator_args; i++) | |
6906ba40 KG |
417 | if (i) |
418 | printf (",\n\trtx operand%d ATTRIBUTE_UNUSED", i); | |
419 | else | |
420 | printf ("rtx operand%d ATTRIBUTE_UNUSED", i); | |
421 | else | |
422 | printf ("void"); | |
65963943 | 423 | printf (")\n"); |
65963943 RK |
424 | printf ("{\n"); |
425 | ||
6614fd40 | 426 | /* Output code to construct and return the rtl for the instruction body. */ |
65963943 | 427 | |
313d38e3 RS |
428 | rtx pattern = add_implicit_parallel (XVEC (insn, 1)); |
429 | /* ??? This is the traditional behavior, but seems suspect. */ | |
430 | char *used = (XVECLEN (insn, 1) == 1 | |
431 | ? NULL | |
432 | : XCNEWVEC (char, stats.num_generator_args)); | |
433 | printf (" return "); | |
434 | gen_exp (pattern, DEFINE_INSN, used); | |
435 | printf (";\n}\n\n"); | |
436 | XDELETEVEC (used); | |
65963943 RK |
437 | } |
438 | \f | |
439 | /* Generate the `gen_...' function for a DEFINE_EXPAND. */ | |
440 | ||
441 | static void | |
5d2d3e43 | 442 | gen_expand (md_rtx_info *info) |
65963943 | 443 | { |
e792559a | 444 | struct pattern_stats stats; |
b3694847 | 445 | int i; |
329b3cc3 | 446 | char *used; |
65963943 | 447 | |
5d2d3e43 | 448 | rtx expand = info->def; |
65963943 | 449 | if (strlen (XSTR (expand, 0)) == 0) |
5d2d3e43 | 450 | fatal_at (info->loc, "define_expand lacks a name"); |
65963943 | 451 | if (XVEC (expand, 1) == 0) |
5d2d3e43 RS |
452 | fatal_at (info->loc, "define_expand for %s lacks a pattern", |
453 | XSTR (expand, 0)); | |
65963943 | 454 | |
85a45cbb | 455 | /* Find out how many operands this function has. */ |
e792559a | 456 | get_pattern_stats (&stats, XVEC (expand, 1)); |
d5a216fa JJ |
457 | if (stats.min_scratch_opno != -1 |
458 | && stats.min_scratch_opno <= MAX (stats.max_opno, stats.max_dup_opno)) | |
459 | fatal_at (info->loc, "define_expand for %s needs to have match_scratch " | |
460 | "numbers above all other operands", XSTR (expand, 0)); | |
65963943 RK |
461 | |
462 | /* Output the function name and argument declarations. */ | |
463 | printf ("rtx\ngen_%s (", XSTR (expand, 0)); | |
e792559a RS |
464 | if (stats.num_generator_args) |
465 | for (i = 0; i < stats.num_generator_args; i++) | |
6906ba40 KG |
466 | if (i) |
467 | printf (",\n\trtx operand%d", i); | |
468 | else | |
469 | printf ("rtx operand%d", i); | |
470 | else | |
471 | printf ("void"); | |
65963943 | 472 | printf (")\n"); |
65963943 RK |
473 | printf ("{\n"); |
474 | ||
475 | /* If we don't have any C code to write, only one insn is being written, | |
476 | and no MATCH_DUPs are present, we can just return the desired insn | |
477 | like we do for a DEFINE_INSN. This saves memory. */ | |
478 | if ((XSTR (expand, 3) == 0 || *XSTR (expand, 3) == '\0') | |
e792559a | 479 | && stats.max_opno >= stats.max_dup_opno |
65963943 RK |
480 | && XVECLEN (expand, 1) == 1) |
481 | { | |
482 | printf (" return "); | |
ab55f58c | 483 | gen_exp (XVECEXP (expand, 1, 0), DEFINE_EXPAND, NULL); |
65963943 RK |
484 | printf (";\n}\n\n"); |
485 | return; | |
486 | } | |
487 | ||
488 | /* For each operand referred to only with MATCH_DUPs, | |
489 | make a local variable. */ | |
e792559a | 490 | for (i = stats.num_generator_args; i <= stats.max_dup_opno; i++) |
65963943 | 491 | printf (" rtx operand%d;\n", i); |
e67d1102 | 492 | printf (" rtx_insn *_val = 0;\n"); |
65963943 RK |
493 | printf (" start_sequence ();\n"); |
494 | ||
495 | /* The fourth operand of DEFINE_EXPAND is some code to be executed | |
496 | before the actual construction. | |
497 | This code expects to refer to `operands' | |
498 | just as the output-code in a DEFINE_INSN does, | |
499 | but here `operands' is an automatic array. | |
500 | So copy the operand values there before executing it. */ | |
501 | if (XSTR (expand, 3) && *XSTR (expand, 3)) | |
502 | { | |
e2bef702 | 503 | printf (" {\n"); |
e792559a RS |
504 | if (stats.num_operand_vars > 0) |
505 | printf (" rtx operands[%d];\n", stats.num_operand_vars); | |
506 | ||
65963943 | 507 | /* Output code to copy the arguments into `operands'. */ |
e792559a | 508 | for (i = 0; i < stats.num_generator_args; i++) |
e2bef702 | 509 | printf (" operands[%d] = operand%d;\n", i, i); |
65963943 RK |
510 | |
511 | /* Output the special code to be executed before the sequence | |
512 | is generated. */ | |
886456e2 RS |
513 | optab_pattern p; |
514 | bool can_fail_p = true; | |
515 | if (find_optab (&p, XSTR (expand, 0))) | |
516 | { | |
517 | gcc_assert (p.op < NUM_OPTABS); | |
518 | if (nofail_optabs[p.op]) | |
519 | can_fail_p = false; | |
520 | } | |
521 | emit_c_code (XSTR (expand, 3), can_fail_p, XSTR (expand, 0)); | |
65963943 RK |
522 | |
523 | /* Output code to copy the arguments back out of `operands' | |
524 | (unless we aren't going to use them at all). */ | |
525 | if (XVEC (expand, 1) != 0) | |
526 | { | |
d5a216fa | 527 | for (i = 0; i <= MAX (stats.max_opno, stats.max_dup_opno); i++) |
60d3aec4 JJ |
528 | { |
529 | printf (" operand%d = operands[%d];\n", i, i); | |
530 | printf (" (void) operand%d;\n", i); | |
531 | } | |
65963943 | 532 | } |
e2bef702 | 533 | printf (" }\n"); |
65963943 RK |
534 | } |
535 | ||
e792559a | 536 | used = XCNEWVEC (char, stats.num_operand_vars); |
3beaff21 | 537 | gen_emit_seq (XVEC (expand, 1), used); |
329b3cc3 KK |
538 | XDELETEVEC (used); |
539 | ||
2f937369 | 540 | /* Call `get_insns' to extract the list of all the |
65963943 RK |
541 | insns emitted within this gen_... function. */ |
542 | ||
2f937369 | 543 | printf (" _val = get_insns ();\n"); |
65963943 RK |
544 | printf (" end_sequence ();\n"); |
545 | printf (" return _val;\n}\n\n"); | |
546 | } | |
547 | ||
2f937369 | 548 | /* Like gen_expand, but generates insns resulting from splitting SPLIT. */ |
0f41302f | 549 | |
65963943 | 550 | static void |
5d2d3e43 | 551 | gen_split (md_rtx_info *info) |
65963943 | 552 | { |
e792559a | 553 | struct pattern_stats stats; |
b3694847 | 554 | int i; |
5d2d3e43 | 555 | rtx split = info->def; |
27c38fbe KG |
556 | const char *const name = |
557 | ((GET_CODE (split) == DEFINE_PEEPHOLE2) ? "peephole2" : "split"); | |
751aa7cc | 558 | const char *unused; |
ab55f58c | 559 | char *used; |
ede7cd44 | 560 | |
65963943 | 561 | if (XVEC (split, 0) == 0) |
5d2d3e43 RS |
562 | fatal_at (info->loc, "%s lacks a pattern", |
563 | GET_RTX_NAME (GET_CODE (split))); | |
65963943 | 564 | else if (XVEC (split, 2) == 0) |
5d2d3e43 RS |
565 | fatal_at (info->loc, "%s lacks a replacement pattern", |
566 | GET_RTX_NAME (GET_CODE (split))); | |
65963943 RK |
567 | |
568 | /* Find out how many operands this function has. */ | |
569 | ||
e792559a RS |
570 | get_pattern_stats (&stats, XVEC (split, 2)); |
571 | unused = (stats.num_operand_vars == 0 ? " ATTRIBUTE_UNUSED" : ""); | |
572 | used = XCNEWVEC (char, stats.num_operand_vars); | |
65963943 | 573 | |
ede7cd44 RH |
574 | /* Output the prototype, function name and argument declarations. */ |
575 | if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
576 | { | |
bb5c4956 | 577 | printf ("extern rtx_insn *gen_%s_%d (rtx_insn *, rtx *);\n", |
5d2d3e43 RS |
578 | name, info->index); |
579 | printf ("rtx_insn *\ngen_%s_%d (rtx_insn *curr_insn ATTRIBUTE_UNUSED," | |
580 | " rtx *operands%s)\n", | |
581 | name, info->index, unused); | |
ede7cd44 RH |
582 | } |
583 | else | |
584 | { | |
bb5c4956 | 585 | printf ("extern rtx_insn *gen_split_%d (rtx_insn *, rtx *);\n", |
5d2d3e43 | 586 | info->index); |
bb5c4956 MM |
587 | printf ("rtx_insn *\ngen_split_%d " |
588 | "(rtx_insn *curr_insn ATTRIBUTE_UNUSED, rtx *operands%s)\n", | |
5d2d3e43 | 589 | info->index, unused); |
ede7cd44 | 590 | } |
65963943 RK |
591 | printf ("{\n"); |
592 | ||
593 | /* Declare all local variables. */ | |
e792559a | 594 | for (i = 0; i < stats.num_operand_vars; i++) |
65963943 | 595 | printf (" rtx operand%d;\n", i); |
bb5c4956 | 596 | printf (" rtx_insn *_val = NULL;\n"); |
ede7cd44 RH |
597 | |
598 | if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
599 | output_peephole2_scratches (split); | |
600 | ||
eddcad13 SB |
601 | printf (" if (dump_file)\n"); |
602 | printf (" fprintf (dump_file, \"Splitting with gen_%s_%d\\n\");\n", | |
5d2d3e43 | 603 | name, info->index); |
eddcad13 | 604 | |
65963943 RK |
605 | printf (" start_sequence ();\n"); |
606 | ||
607 | /* The fourth operand of DEFINE_SPLIT is some code to be executed | |
608 | before the actual construction. */ | |
609 | ||
610 | if (XSTR (split, 3)) | |
886456e2 | 611 | emit_c_code (XSTR (split, 3), true, name); |
65963943 RK |
612 | |
613 | /* Output code to copy the arguments back out of `operands' */ | |
e792559a | 614 | for (i = 0; i < stats.num_operand_vars; i++) |
60d3aec4 JJ |
615 | { |
616 | printf (" operand%d = operands[%d];\n", i, i); | |
617 | printf (" (void) operand%d;\n", i); | |
618 | } | |
65963943 | 619 | |
3beaff21 | 620 | gen_emit_seq (XVEC (split, 2), used); |
65963943 | 621 | |
2f937369 | 622 | /* Call `get_insns' to make a list of all the |
65963943 RK |
623 | insns emitted within this gen_... function. */ |
624 | ||
2f937369 | 625 | printf (" _val = get_insns ();\n"); |
65963943 RK |
626 | printf (" end_sequence ();\n"); |
627 | printf (" return _val;\n}\n\n"); | |
ab55f58c RH |
628 | |
629 | free (used); | |
65963943 RK |
630 | } |
631 | \f | |
632 | /* Write a function, `add_clobbers', that is given a PARALLEL of sufficient | |
633 | size for the insn and an INSN_CODE, and inserts the required CLOBBERs at | |
634 | the end of the vector. */ | |
635 | ||
636 | static void | |
7e51717c | 637 | output_add_clobbers (void) |
65963943 RK |
638 | { |
639 | struct clobber_pat *clobber; | |
e5f6a288 | 640 | struct clobber_ent *ent; |
65963943 RK |
641 | int i; |
642 | ||
6906ba40 | 643 | printf ("\n\nvoid\nadd_clobbers (rtx pattern ATTRIBUTE_UNUSED, int insn_code_number)\n"); |
65963943 | 644 | printf ("{\n"); |
65963943 RK |
645 | printf (" switch (insn_code_number)\n"); |
646 | printf (" {\n"); | |
647 | ||
648 | for (clobber = clobber_list; clobber; clobber = clobber->next) | |
649 | { | |
e5f6a288 RK |
650 | for (ent = clobber->insns; ent; ent = ent->next) |
651 | printf (" case %d:\n", ent->code_number); | |
65963943 RK |
652 | |
653 | for (i = clobber->first_clobber; i < XVECLEN (clobber->pattern, 1); i++) | |
654 | { | |
655 | printf (" XVECEXP (pattern, 0, %d) = ", i); | |
ede7cd44 | 656 | gen_exp (XVECEXP (clobber->pattern, 1, i), |
ab55f58c | 657 | GET_CODE (clobber->pattern), NULL); |
65963943 RK |
658 | printf (";\n"); |
659 | } | |
660 | ||
e5f6a288 | 661 | printf (" break;\n\n"); |
65963943 RK |
662 | } |
663 | ||
664 | printf (" default:\n"); | |
b2d59f6f | 665 | printf (" gcc_unreachable ();\n"); |
65963943 RK |
666 | printf (" }\n"); |
667 | printf ("}\n"); | |
668 | } | |
669 | \f | |
6327d36a RK |
670 | /* Write a function, `added_clobbers_hard_reg_p' that is given an insn_code |
671 | number that will have clobbers added (as indicated by `recog') and returns | |
672 | 1 if those include a clobber of a hard reg or 0 if all of them just clobber | |
673 | SCRATCH. */ | |
751aa7cc RK |
674 | |
675 | static void | |
3d7aafde | 676 | output_added_clobbers_hard_reg_p (void) |
751aa7cc RK |
677 | { |
678 | struct clobber_pat *clobber; | |
679 | struct clobber_ent *ent; | |
a29b099d | 680 | int clobber_p, used; |
751aa7cc | 681 | |
6906ba40 | 682 | printf ("\n\nint\nadded_clobbers_hard_reg_p (int insn_code_number)\n"); |
751aa7cc RK |
683 | printf ("{\n"); |
684 | printf (" switch (insn_code_number)\n"); | |
685 | printf (" {\n"); | |
686 | ||
687 | for (clobber_p = 0; clobber_p <= 1; clobber_p++) | |
688 | { | |
a29b099d | 689 | used = 0; |
751aa7cc RK |
690 | for (clobber = clobber_list; clobber; clobber = clobber->next) |
691 | if (clobber->has_hard_reg == clobber_p) | |
692 | for (ent = clobber->insns; ent; ent = ent->next) | |
a29b099d JJ |
693 | { |
694 | printf (" case %d:\n", ent->code_number); | |
695 | used++; | |
696 | } | |
751aa7cc | 697 | |
a29b099d JJ |
698 | if (used) |
699 | printf (" return %d;\n\n", clobber_p); | |
751aa7cc RK |
700 | } |
701 | ||
702 | printf (" default:\n"); | |
b2d59f6f | 703 | printf (" gcc_unreachable ();\n"); |
751aa7cc RK |
704 | printf (" }\n"); |
705 | printf ("}\n"); | |
706 | } | |
707 | \f | |
ede7cd44 | 708 | /* Generate code to invoke find_free_register () as needed for the |
dc297297 | 709 | scratch registers used by the peephole2 pattern in SPLIT. */ |
ede7cd44 RH |
710 | |
711 | static void | |
3d7aafde | 712 | output_peephole2_scratches (rtx split) |
ede7cd44 RH |
713 | { |
714 | int i; | |
715 | int insn_nr = 0; | |
f1ed99cd | 716 | bool first = true; |
ede7cd44 RH |
717 | |
718 | for (i = 0; i < XVECLEN (split, 0); i++) | |
719 | { | |
720 | rtx elt = XVECEXP (split, 0, i); | |
721 | if (GET_CODE (elt) == MATCH_SCRATCH) | |
722 | { | |
723 | int last_insn_nr = insn_nr; | |
724 | int cur_insn_nr = insn_nr; | |
725 | int j; | |
726 | for (j = i + 1; j < XVECLEN (split, 0); j++) | |
727 | if (GET_CODE (XVECEXP (split, 0, j)) == MATCH_DUP) | |
728 | { | |
729 | if (XINT (XVECEXP (split, 0, j), 0) == XINT (elt, 0)) | |
730 | last_insn_nr = cur_insn_nr; | |
731 | } | |
732 | else if (GET_CODE (XVECEXP (split, 0, j)) != MATCH_SCRATCH) | |
733 | cur_insn_nr++; | |
23280139 | 734 | |
f1ed99cd JJ |
735 | if (first) |
736 | { | |
737 | printf (" HARD_REG_SET _regs_allocated;\n"); | |
738 | printf (" CLEAR_HARD_REG_SET (_regs_allocated);\n"); | |
739 | first = false; | |
740 | } | |
741 | ||
23280139 | 742 | printf (" if ((operands[%d] = peep2_find_free_register (%d, %d, \"%s\", %smode, &_regs_allocated)) == NULL_RTX)\n\ |
3d7aafde | 743 | return NULL;\n", |
ede7cd44 | 744 | XINT (elt, 0), |
23280139 | 745 | insn_nr, last_insn_nr, |
ede7cd44 RH |
746 | XSTR (elt, 1), |
747 | GET_MODE_NAME (GET_MODE (elt))); | |
748 | ||
749 | } | |
750 | else if (GET_CODE (elt) != MATCH_DUP) | |
751 | insn_nr++; | |
752 | } | |
753 | } | |
65963943 | 754 | |
65963943 | 755 | int |
66b0fe8f | 756 | main (int argc, const char **argv) |
65963943 | 757 | { |
f8b6598e | 758 | progname = "genemit"; |
65963943 | 759 | |
600ab3fc | 760 | if (!init_rtx_reader_args (argc, argv)) |
c88c0d42 | 761 | return (FATAL_EXIT_CODE); |
65963943 | 762 | |
886456e2 RS |
763 | #define DEF_INTERNAL_OPTAB_FN(NAME, FLAGS, OPTAB, TYPE) \ |
764 | nofail_optabs[OPTAB##_optab] = true; | |
765 | #include "internal-fn.def" | |
766 | ||
65963943 RK |
767 | /* Assign sequential codes to all entries in the machine description |
768 | in parallel with the tables in insn-output.c. */ | |
769 | ||
65963943 RK |
770 | printf ("/* Generated automatically by the program `genemit'\n\ |
771 | from the machine description file `md'. */\n\n"); | |
772 | ||
8fcc61f8 | 773 | printf ("#define IN_TARGET_CODE 1\n"); |
65963943 | 774 | printf ("#include \"config.h\"\n"); |
729da3f5 | 775 | printf ("#include \"system.h\"\n"); |
4977bab6 | 776 | printf ("#include \"coretypes.h\"\n"); |
c7131fb2 | 777 | printf ("#include \"backend.h\"\n"); |
9fdcd34e | 778 | printf ("#include \"predict.h\"\n"); |
4d648807 | 779 | printf ("#include \"tree.h\"\n"); |
c7131fb2 AM |
780 | printf ("#include \"rtl.h\"\n"); |
781 | printf ("#include \"alias.h\"\n"); | |
d8a2d370 DN |
782 | printf ("#include \"varasm.h\"\n"); |
783 | printf ("#include \"stor-layout.h\"\n"); | |
784 | printf ("#include \"calls.h\"\n"); | |
4d0cdd0c | 785 | printf ("#include \"memmodel.h\"\n"); |
6baf1cc8 | 786 | printf ("#include \"tm_p.h\"\n"); |
36566b39 | 787 | printf ("#include \"flags.h\"\n"); |
36566b39 PK |
788 | printf ("#include \"insn-config.h\"\n"); |
789 | printf ("#include \"expmed.h\"\n"); | |
790 | printf ("#include \"dojump.h\"\n"); | |
791 | printf ("#include \"explow.h\"\n"); | |
792 | printf ("#include \"emit-rtl.h\"\n"); | |
793 | printf ("#include \"stmt.h\"\n"); | |
65963943 | 794 | printf ("#include \"expr.h\"\n"); |
b0710fe1 | 795 | printf ("#include \"insn-codes.h\"\n"); |
e78d8e51 | 796 | printf ("#include \"optabs.h\"\n"); |
c413e1b5 | 797 | printf ("#include \"dfp.h\"\n"); |
65963943 | 798 | printf ("#include \"output.h\"\n"); |
23280139 | 799 | printf ("#include \"recog.h\"\n"); |
c7131fb2 | 800 | printf ("#include \"df.h\"\n"); |
ede7cd44 | 801 | printf ("#include \"resource.h\"\n"); |
d80eb1e1 | 802 | printf ("#include \"reload.h\"\n"); |
79a3f089 | 803 | printf ("#include \"diagnostic-core.h\"\n"); |
5abc5de9 | 804 | printf ("#include \"regs.h\"\n"); |
279bb624 | 805 | printf ("#include \"tm-constrs.h\"\n"); |
5abc5de9 | 806 | printf ("#include \"ggc.h\"\n"); |
3b1552c1 | 807 | printf ("#include \"target.h\"\n\n"); |
65963943 RK |
808 | |
809 | /* Read the machine description. */ | |
810 | ||
5d2d3e43 RS |
811 | md_rtx_info info; |
812 | while (read_md_rtx (&info)) | |
813 | switch (GET_CODE (info.def)) | |
814 | { | |
815 | case DEFINE_INSN: | |
816 | gen_insn (&info); | |
c88c0d42 | 817 | break; |
ede7cd44 | 818 | |
5d2d3e43 RS |
819 | case DEFINE_EXPAND: |
820 | printf ("/* %s:%d */\n", info.loc.filename, info.loc.lineno); | |
821 | gen_expand (&info); | |
822 | break; | |
821e35ba | 823 | |
5d2d3e43 RS |
824 | case DEFINE_SPLIT: |
825 | printf ("/* %s:%d */\n", info.loc.filename, info.loc.lineno); | |
826 | gen_split (&info); | |
827 | break; | |
821e35ba | 828 | |
5d2d3e43 RS |
829 | case DEFINE_PEEPHOLE2: |
830 | printf ("/* %s:%d */\n", info.loc.filename, info.loc.lineno); | |
831 | gen_split (&info); | |
832 | break; | |
821e35ba | 833 | |
5d2d3e43 RS |
834 | default: |
835 | break; | |
836 | } | |
65963943 | 837 | |
751aa7cc RK |
838 | /* Write out the routines to add CLOBBERs to a pattern and say whether they |
839 | clobber a hard reg. */ | |
65963943 | 840 | output_add_clobbers (); |
751aa7cc | 841 | output_added_clobbers_hard_reg_p (); |
65963943 | 842 | |
65963943 | 843 | fflush (stdout); |
c1b59dce | 844 | return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |
65963943 | 845 | } |