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Commit | Line | Data |
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65963943 | 1 | /* Generate code from machine description to emit insns as rtl. |
5624e564 | 2 | Copyright (C) 1987-2015 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 | |
65963943 RK |
54 | \f |
55 | static void | |
3d7aafde | 56 | print_code (RTX_CODE code) |
65963943 | 57 | { |
b3694847 | 58 | const char *p1; |
65963943 | 59 | for (p1 = GET_RTX_NAME (code); *p1; p1++) |
c3284718 | 60 | putchar (TOUPPER (*p1)); |
65963943 RK |
61 | } |
62 | ||
ede7cd44 | 63 | static void |
3d7aafde | 64 | gen_rtx_scratch (rtx x, enum rtx_code subroutine_type) |
ede7cd44 RH |
65 | { |
66 | if (subroutine_type == DEFINE_PEEPHOLE2) | |
67 | { | |
68 | printf ("operand%d", XINT (x, 0)); | |
69 | } | |
70 | else | |
71 | { | |
72 | printf ("gen_rtx_SCRATCH (%smode)", GET_MODE_NAME (GET_MODE (x))); | |
73 | } | |
74 | } | |
75 | ||
65963943 RK |
76 | /* Print a C expression to construct an RTX just like X, |
77 | substituting any operand references appearing within. */ | |
78 | ||
79 | static void | |
3d7aafde | 80 | gen_exp (rtx x, enum rtx_code subroutine_type, char *used) |
65963943 | 81 | { |
b3694847 SS |
82 | RTX_CODE code; |
83 | int i; | |
84 | int len; | |
85 | const char *fmt; | |
f7df4a84 | 86 | const char *sep = ""; |
65963943 RK |
87 | |
88 | if (x == 0) | |
89 | { | |
3d678dca | 90 | printf ("NULL_RTX"); |
65963943 RK |
91 | return; |
92 | } | |
93 | ||
94 | code = GET_CODE (x); | |
95 | ||
96 | switch (code) | |
97 | { | |
98 | case MATCH_OPERAND: | |
99 | case MATCH_DUP: | |
ab55f58c RH |
100 | if (used) |
101 | { | |
102 | if (used[XINT (x, 0)]) | |
103 | { | |
104 | printf ("copy_rtx (operand%d)", XINT (x, 0)); | |
105 | return; | |
106 | } | |
107 | used[XINT (x, 0)] = 1; | |
108 | } | |
65963943 RK |
109 | printf ("operand%d", XINT (x, 0)); |
110 | return; | |
111 | ||
112 | case MATCH_OP_DUP: | |
600555f5 KH |
113 | printf ("gen_rtx_fmt_"); |
114 | for (i = 0; i < XVECLEN (x, 1); i++) | |
115 | printf ("e"); | |
116 | printf (" (GET_CODE (operand%d), ", XINT (x, 0)); | |
4ceb7595 JC |
117 | if (GET_MODE (x) == VOIDmode) |
118 | printf ("GET_MODE (operand%d)", XINT (x, 0)); | |
119 | else | |
120 | printf ("%smode", GET_MODE_NAME (GET_MODE (x))); | |
65963943 RK |
121 | for (i = 0; i < XVECLEN (x, 1); i++) |
122 | { | |
123 | printf (",\n\t\t"); | |
ab55f58c | 124 | gen_exp (XVECEXP (x, 1, i), subroutine_type, used); |
65963943 RK |
125 | } |
126 | printf (")"); | |
127 | return; | |
128 | ||
129 | case MATCH_OPERATOR: | |
600555f5 KH |
130 | printf ("gen_rtx_fmt_"); |
131 | for (i = 0; i < XVECLEN (x, 2); i++) | |
132 | printf ("e"); | |
133 | printf (" (GET_CODE (operand%d)", XINT (x, 0)); | |
65963943 RK |
134 | printf (", %smode", GET_MODE_NAME (GET_MODE (x))); |
135 | for (i = 0; i < XVECLEN (x, 2); i++) | |
136 | { | |
137 | printf (",\n\t\t"); | |
ab55f58c | 138 | gen_exp (XVECEXP (x, 2, i), subroutine_type, used); |
65963943 RK |
139 | } |
140 | printf (")"); | |
141 | return; | |
142 | ||
143 | case MATCH_PARALLEL: | |
8fabbfe6 | 144 | case MATCH_PAR_DUP: |
65963943 RK |
145 | printf ("operand%d", XINT (x, 0)); |
146 | return; | |
147 | ||
148 | case MATCH_SCRATCH: | |
ede7cd44 | 149 | gen_rtx_scratch (x, subroutine_type); |
65963943 RK |
150 | return; |
151 | ||
65963943 RK |
152 | case PC: |
153 | printf ("pc_rtx"); | |
154 | return; | |
3810076b BS |
155 | case RETURN: |
156 | printf ("ret_rtx"); | |
157 | return; | |
26898771 BS |
158 | case SIMPLE_RETURN: |
159 | printf ("simple_return_rtx"); | |
160 | return; | |
3e89ed8d JH |
161 | case CLOBBER: |
162 | if (REG_P (XEXP (x, 0))) | |
163 | { | |
164 | printf ("gen_hard_reg_clobber (%smode, %i)", GET_MODE_NAME (GET_MODE (XEXP (x, 0))), | |
165 | REGNO (XEXP (x, 0))); | |
166 | return; | |
167 | } | |
168 | break; | |
65963943 RK |
169 | |
170 | case CC0: | |
171 | printf ("cc0_rtx"); | |
172 | return; | |
173 | ||
174 | case CONST_INT: | |
175 | if (INTVAL (x) == 0) | |
3d678dca RS |
176 | printf ("const0_rtx"); |
177 | else if (INTVAL (x) == 1) | |
178 | printf ("const1_rtx"); | |
179 | else if (INTVAL (x) == -1) | |
180 | printf ("constm1_rtx"); | |
11b635fe KH |
181 | else if (-MAX_SAVED_CONST_INT <= INTVAL (x) |
182 | && INTVAL (x) <= MAX_SAVED_CONST_INT) | |
183 | printf ("const_int_rtx[MAX_SAVED_CONST_INT + (%d)]", | |
184 | (int) INTVAL (x)); | |
3d678dca RS |
185 | else if (INTVAL (x) == STORE_FLAG_VALUE) |
186 | printf ("const_true_rtx"); | |
187 | else | |
76d31c63 JL |
188 | { |
189 | printf ("GEN_INT ("); | |
bb9b3805 | 190 | printf (HOST_WIDE_INT_PRINT_DEC_C, INTVAL (x)); |
76d31c63 JL |
191 | printf (")"); |
192 | } | |
3d678dca RS |
193 | return; |
194 | ||
195 | case CONST_DOUBLE: | |
091a3ac7 | 196 | case CONST_FIXED: |
807e902e | 197 | case CONST_WIDE_INT: |
3d678dca RS |
198 | /* These shouldn't be written in MD files. Instead, the appropriate |
199 | routines in varasm.c should be called. */ | |
b2d59f6f | 200 | gcc_unreachable (); |
1d300e19 KG |
201 | |
202 | default: | |
203 | break; | |
65963943 RK |
204 | } |
205 | ||
3b80f6ca | 206 | printf ("gen_rtx_"); |
65963943 | 207 | print_code (code); |
f7df4a84 RS |
208 | printf (" ("); |
209 | if (!always_void_p (code)) | |
210 | { | |
211 | printf ("%smode", GET_MODE_NAME (GET_MODE (x))); | |
212 | sep = ",\n\t"; | |
213 | } | |
65963943 RK |
214 | |
215 | fmt = GET_RTX_FORMAT (code); | |
216 | len = GET_RTX_LENGTH (code); | |
217 | for (i = 0; i < len; i++) | |
218 | { | |
219 | if (fmt[i] == '0') | |
220 | break; | |
f7df4a84 | 221 | fputs (sep, stdout); |
b2d59f6f | 222 | switch (fmt[i]) |
65963943 | 223 | { |
b2d59f6f NS |
224 | case 'e': case 'u': |
225 | gen_exp (XEXP (x, i), subroutine_type, used); | |
226 | break; | |
227 | ||
228 | case 'i': | |
229 | printf ("%u", XINT (x, i)); | |
230 | break; | |
231 | ||
9fccb335 RS |
232 | case 'r': |
233 | printf ("%u", REGNO (x)); | |
234 | break; | |
235 | ||
b2d59f6f NS |
236 | case 's': |
237 | printf ("\"%s\"", XSTR (x, i)); | |
238 | break; | |
239 | ||
240 | case 'E': | |
241 | { | |
242 | int j; | |
243 | printf ("gen_rtvec (%d", XVECLEN (x, i)); | |
244 | for (j = 0; j < XVECLEN (x, i); j++) | |
245 | { | |
246 | printf (",\n\t\t"); | |
247 | gen_exp (XVECEXP (x, i, j), subroutine_type, used); | |
248 | } | |
249 | printf (")"); | |
250 | break; | |
251 | } | |
252 | ||
253 | default: | |
254 | gcc_unreachable (); | |
65963943 | 255 | } |
f7df4a84 | 256 | sep = ",\n\t"; |
65963943 RK |
257 | } |
258 | printf (")"); | |
3d7aafde | 259 | } |
3beaff21 RS |
260 | |
261 | /* Output code to emit the instruction patterns in VEC, with each element | |
262 | becoming a separate instruction. USED is as for gen_exp. */ | |
263 | ||
264 | static void | |
265 | gen_emit_seq (rtvec vec, char *used) | |
266 | { | |
267 | for (int i = 0, len = GET_NUM_ELEM (vec); i < len; ++i) | |
268 | { | |
9d8895c9 | 269 | bool last_p = (i == len - 1); |
3beaff21 | 270 | rtx next = RTVEC_ELT (vec, i); |
9d8895c9 RS |
271 | if (const char *name = get_emit_function (next)) |
272 | { | |
273 | printf (" %s (", name); | |
274 | gen_exp (next, DEFINE_EXPAND, used); | |
275 | printf (");\n"); | |
276 | if (!last_p && needs_barrier_p (next)) | |
277 | printf (" emit_barrier ();"); | |
278 | } | |
279 | else | |
280 | { | |
281 | printf (" emit ("); | |
282 | gen_exp (next, DEFINE_EXPAND, used); | |
283 | printf (", %s);\n", last_p ? "false" : "true"); | |
284 | } | |
3beaff21 RS |
285 | } |
286 | } | |
65963943 RK |
287 | \f |
288 | /* Generate the `gen_...' function for a DEFINE_INSN. */ | |
289 | ||
290 | static void | |
5d2d3e43 | 291 | gen_insn (md_rtx_info *info) |
65963943 | 292 | { |
e792559a | 293 | struct pattern_stats stats; |
b3694847 | 294 | int i; |
65963943 RK |
295 | |
296 | /* See if the pattern for this insn ends with a group of CLOBBERs of (hard) | |
297 | registers or MATCH_SCRATCHes. If so, store away the information for | |
0f41302f | 298 | later. */ |
65963943 | 299 | |
5d2d3e43 | 300 | rtx insn = info->def; |
65963943 RK |
301 | if (XVEC (insn, 1)) |
302 | { | |
751aa7cc RK |
303 | int has_hard_reg = 0; |
304 | ||
65963943 | 305 | for (i = XVECLEN (insn, 1) - 1; i > 0; i--) |
751aa7cc RK |
306 | { |
307 | if (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER) | |
308 | break; | |
309 | ||
f8cfc6aa | 310 | if (REG_P (XEXP (XVECEXP (insn, 1, i), 0))) |
751aa7cc RK |
311 | has_hard_reg = 1; |
312 | else if (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH) | |
313 | break; | |
314 | } | |
65963943 RK |
315 | |
316 | if (i != XVECLEN (insn, 1) - 1) | |
317 | { | |
b3694847 | 318 | struct clobber_pat *p; |
5ed6ace5 | 319 | struct clobber_ent *link = XNEW (struct clobber_ent); |
b3694847 | 320 | int j; |
e5f6a288 | 321 | |
5d2d3e43 | 322 | link->code_number = info->index; |
e5f6a288 RK |
323 | |
324 | /* See if any previous CLOBBER_LIST entry is the same as this | |
325 | one. */ | |
326 | ||
327 | for (p = clobber_list; p; p = p->next) | |
328 | { | |
329 | if (p->first_clobber != i + 1 | |
330 | || XVECLEN (p->pattern, 1) != XVECLEN (insn, 1)) | |
331 | continue; | |
332 | ||
333 | for (j = i + 1; j < XVECLEN (insn, 1); j++) | |
334 | { | |
8ad97cfc KG |
335 | rtx old_rtx = XEXP (XVECEXP (p->pattern, 1, j), 0); |
336 | rtx new_rtx = XEXP (XVECEXP (insn, 1, j), 0); | |
e5f6a288 | 337 | |
8ad97cfc | 338 | /* OLD and NEW_INSN are the same if both are to be a SCRATCH |
3d7aafde | 339 | of the same mode, |
e5f6a288 | 340 | or if both are registers of the same mode and number. */ |
8ad97cfc KG |
341 | if (! (GET_MODE (old_rtx) == GET_MODE (new_rtx) |
342 | && ((GET_CODE (old_rtx) == MATCH_SCRATCH | |
343 | && GET_CODE (new_rtx) == MATCH_SCRATCH) | |
344 | || (REG_P (old_rtx) && REG_P (new_rtx) | |
345 | && REGNO (old_rtx) == REGNO (new_rtx))))) | |
e5f6a288 RK |
346 | break; |
347 | } | |
3d7aafde | 348 | |
e5f6a288 RK |
349 | if (j == XVECLEN (insn, 1)) |
350 | break; | |
351 | } | |
352 | ||
353 | if (p == 0) | |
354 | { | |
5ed6ace5 | 355 | p = XNEW (struct clobber_pat); |
3d7aafde | 356 | |
e5f6a288 RK |
357 | p->insns = 0; |
358 | p->pattern = insn; | |
359 | p->first_clobber = i + 1; | |
360 | p->next = clobber_list; | |
751aa7cc | 361 | p->has_hard_reg = has_hard_reg; |
e5f6a288 RK |
362 | clobber_list = p; |
363 | } | |
364 | ||
365 | link->next = p->insns; | |
366 | p->insns = link; | |
65963943 RK |
367 | } |
368 | } | |
369 | ||
6b6ca844 RK |
370 | /* Don't mention instructions whose names are the null string |
371 | or begin with '*'. They are in the machine description just | |
372 | to be recognized. */ | |
373 | if (XSTR (insn, 0)[0] == 0 || XSTR (insn, 0)[0] == '*') | |
65963943 RK |
374 | return; |
375 | ||
5d2d3e43 | 376 | printf ("/* %s:%d */\n", info->loc.filename, info->loc.lineno); |
821e35ba | 377 | |
85a45cbb | 378 | /* Find out how many operands this function has. */ |
e792559a RS |
379 | get_pattern_stats (&stats, XVEC (insn, 1)); |
380 | if (stats.max_dup_opno > stats.max_opno) | |
5d2d3e43 | 381 | fatal_at (info->loc, "match_dup operand number has no match_operand"); |
65963943 RK |
382 | |
383 | /* Output the function name and argument declarations. */ | |
384 | printf ("rtx\ngen_%s (", XSTR (insn, 0)); | |
e792559a RS |
385 | if (stats.num_generator_args) |
386 | for (i = 0; i < stats.num_generator_args; i++) | |
6906ba40 KG |
387 | if (i) |
388 | printf (",\n\trtx operand%d ATTRIBUTE_UNUSED", i); | |
389 | else | |
390 | printf ("rtx operand%d ATTRIBUTE_UNUSED", i); | |
391 | else | |
392 | printf ("void"); | |
65963943 | 393 | printf (")\n"); |
65963943 RK |
394 | printf ("{\n"); |
395 | ||
6614fd40 | 396 | /* Output code to construct and return the rtl for the instruction body. */ |
65963943 | 397 | |
313d38e3 RS |
398 | rtx pattern = add_implicit_parallel (XVEC (insn, 1)); |
399 | /* ??? This is the traditional behavior, but seems suspect. */ | |
400 | char *used = (XVECLEN (insn, 1) == 1 | |
401 | ? NULL | |
402 | : XCNEWVEC (char, stats.num_generator_args)); | |
403 | printf (" return "); | |
404 | gen_exp (pattern, DEFINE_INSN, used); | |
405 | printf (";\n}\n\n"); | |
406 | XDELETEVEC (used); | |
65963943 RK |
407 | } |
408 | \f | |
409 | /* Generate the `gen_...' function for a DEFINE_EXPAND. */ | |
410 | ||
411 | static void | |
5d2d3e43 | 412 | gen_expand (md_rtx_info *info) |
65963943 | 413 | { |
e792559a | 414 | struct pattern_stats stats; |
b3694847 | 415 | int i; |
329b3cc3 | 416 | char *used; |
65963943 | 417 | |
5d2d3e43 | 418 | rtx expand = info->def; |
65963943 | 419 | if (strlen (XSTR (expand, 0)) == 0) |
5d2d3e43 | 420 | fatal_at (info->loc, "define_expand lacks a name"); |
65963943 | 421 | if (XVEC (expand, 1) == 0) |
5d2d3e43 RS |
422 | fatal_at (info->loc, "define_expand for %s lacks a pattern", |
423 | XSTR (expand, 0)); | |
65963943 | 424 | |
85a45cbb | 425 | /* Find out how many operands this function has. */ |
e792559a | 426 | get_pattern_stats (&stats, XVEC (expand, 1)); |
65963943 RK |
427 | |
428 | /* Output the function name and argument declarations. */ | |
429 | printf ("rtx\ngen_%s (", XSTR (expand, 0)); | |
e792559a RS |
430 | if (stats.num_generator_args) |
431 | for (i = 0; i < stats.num_generator_args; i++) | |
6906ba40 KG |
432 | if (i) |
433 | printf (",\n\trtx operand%d", i); | |
434 | else | |
435 | printf ("rtx operand%d", i); | |
436 | else | |
437 | printf ("void"); | |
65963943 | 438 | printf (")\n"); |
65963943 RK |
439 | printf ("{\n"); |
440 | ||
441 | /* If we don't have any C code to write, only one insn is being written, | |
442 | and no MATCH_DUPs are present, we can just return the desired insn | |
443 | like we do for a DEFINE_INSN. This saves memory. */ | |
444 | if ((XSTR (expand, 3) == 0 || *XSTR (expand, 3) == '\0') | |
e792559a | 445 | && stats.max_opno >= stats.max_dup_opno |
65963943 RK |
446 | && XVECLEN (expand, 1) == 1) |
447 | { | |
448 | printf (" return "); | |
ab55f58c | 449 | gen_exp (XVECEXP (expand, 1, 0), DEFINE_EXPAND, NULL); |
65963943 RK |
450 | printf (";\n}\n\n"); |
451 | return; | |
452 | } | |
453 | ||
454 | /* For each operand referred to only with MATCH_DUPs, | |
455 | make a local variable. */ | |
e792559a | 456 | for (i = stats.num_generator_args; i <= stats.max_dup_opno; i++) |
65963943 | 457 | printf (" rtx operand%d;\n", i); |
e792559a | 458 | for (; i <= stats.max_scratch_opno; i++) |
b3656137 | 459 | printf (" rtx operand%d ATTRIBUTE_UNUSED;\n", i); |
e67d1102 | 460 | printf (" rtx_insn *_val = 0;\n"); |
65963943 RK |
461 | printf (" start_sequence ();\n"); |
462 | ||
463 | /* The fourth operand of DEFINE_EXPAND is some code to be executed | |
464 | before the actual construction. | |
465 | This code expects to refer to `operands' | |
466 | just as the output-code in a DEFINE_INSN does, | |
467 | but here `operands' is an automatic array. | |
468 | So copy the operand values there before executing it. */ | |
469 | if (XSTR (expand, 3) && *XSTR (expand, 3)) | |
470 | { | |
e2bef702 | 471 | printf (" {\n"); |
e792559a RS |
472 | if (stats.num_operand_vars > 0) |
473 | printf (" rtx operands[%d];\n", stats.num_operand_vars); | |
474 | ||
65963943 | 475 | /* Output code to copy the arguments into `operands'. */ |
e792559a | 476 | for (i = 0; i < stats.num_generator_args; i++) |
e2bef702 | 477 | printf (" operands[%d] = operand%d;\n", i, i); |
65963943 RK |
478 | |
479 | /* Output the special code to be executed before the sequence | |
480 | is generated. */ | |
d2a3ce4e | 481 | print_md_ptr_loc (XSTR (expand, 3)); |
65963943 RK |
482 | printf ("%s\n", XSTR (expand, 3)); |
483 | ||
484 | /* Output code to copy the arguments back out of `operands' | |
485 | (unless we aren't going to use them at all). */ | |
486 | if (XVEC (expand, 1) != 0) | |
487 | { | |
e792559a | 488 | for (i = 0; i < stats.num_operand_vars; i++) |
60d3aec4 JJ |
489 | { |
490 | printf (" operand%d = operands[%d];\n", i, i); | |
491 | printf (" (void) operand%d;\n", i); | |
492 | } | |
65963943 | 493 | } |
e2bef702 | 494 | printf (" }\n"); |
65963943 RK |
495 | } |
496 | ||
e792559a | 497 | used = XCNEWVEC (char, stats.num_operand_vars); |
3beaff21 | 498 | gen_emit_seq (XVEC (expand, 1), used); |
329b3cc3 KK |
499 | XDELETEVEC (used); |
500 | ||
2f937369 | 501 | /* Call `get_insns' to extract the list of all the |
65963943 RK |
502 | insns emitted within this gen_... function. */ |
503 | ||
2f937369 | 504 | printf (" _val = get_insns ();\n"); |
65963943 RK |
505 | printf (" end_sequence ();\n"); |
506 | printf (" return _val;\n}\n\n"); | |
507 | } | |
508 | ||
2f937369 | 509 | /* Like gen_expand, but generates insns resulting from splitting SPLIT. */ |
0f41302f | 510 | |
65963943 | 511 | static void |
5d2d3e43 | 512 | gen_split (md_rtx_info *info) |
65963943 | 513 | { |
e792559a | 514 | struct pattern_stats stats; |
b3694847 | 515 | int i; |
5d2d3e43 | 516 | rtx split = info->def; |
27c38fbe KG |
517 | const char *const name = |
518 | ((GET_CODE (split) == DEFINE_PEEPHOLE2) ? "peephole2" : "split"); | |
751aa7cc | 519 | const char *unused; |
ab55f58c | 520 | char *used; |
ede7cd44 | 521 | |
65963943 | 522 | if (XVEC (split, 0) == 0) |
5d2d3e43 RS |
523 | fatal_at (info->loc, "%s lacks a pattern", |
524 | GET_RTX_NAME (GET_CODE (split))); | |
65963943 | 525 | else if (XVEC (split, 2) == 0) |
5d2d3e43 RS |
526 | fatal_at (info->loc, "%s lacks a replacement pattern", |
527 | GET_RTX_NAME (GET_CODE (split))); | |
65963943 RK |
528 | |
529 | /* Find out how many operands this function has. */ | |
530 | ||
e792559a RS |
531 | get_pattern_stats (&stats, XVEC (split, 2)); |
532 | unused = (stats.num_operand_vars == 0 ? " ATTRIBUTE_UNUSED" : ""); | |
533 | used = XCNEWVEC (char, stats.num_operand_vars); | |
65963943 | 534 | |
ede7cd44 RH |
535 | /* Output the prototype, function name and argument declarations. */ |
536 | if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
537 | { | |
bb5c4956 | 538 | printf ("extern rtx_insn *gen_%s_%d (rtx_insn *, rtx *);\n", |
5d2d3e43 RS |
539 | name, info->index); |
540 | printf ("rtx_insn *\ngen_%s_%d (rtx_insn *curr_insn ATTRIBUTE_UNUSED," | |
541 | " rtx *operands%s)\n", | |
542 | name, info->index, unused); | |
ede7cd44 RH |
543 | } |
544 | else | |
545 | { | |
bb5c4956 | 546 | printf ("extern rtx_insn *gen_split_%d (rtx_insn *, rtx *);\n", |
5d2d3e43 | 547 | info->index); |
bb5c4956 MM |
548 | printf ("rtx_insn *\ngen_split_%d " |
549 | "(rtx_insn *curr_insn ATTRIBUTE_UNUSED, rtx *operands%s)\n", | |
5d2d3e43 | 550 | info->index, unused); |
ede7cd44 | 551 | } |
65963943 RK |
552 | printf ("{\n"); |
553 | ||
554 | /* Declare all local variables. */ | |
e792559a | 555 | for (i = 0; i < stats.num_operand_vars; i++) |
65963943 | 556 | printf (" rtx operand%d;\n", i); |
bb5c4956 | 557 | printf (" rtx_insn *_val = NULL;\n"); |
ede7cd44 RH |
558 | |
559 | if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
560 | output_peephole2_scratches (split); | |
561 | ||
eddcad13 SB |
562 | printf (" if (dump_file)\n"); |
563 | printf (" fprintf (dump_file, \"Splitting with gen_%s_%d\\n\");\n", | |
5d2d3e43 | 564 | name, info->index); |
eddcad13 | 565 | |
65963943 RK |
566 | printf (" start_sequence ();\n"); |
567 | ||
568 | /* The fourth operand of DEFINE_SPLIT is some code to be executed | |
569 | before the actual construction. */ | |
570 | ||
571 | if (XSTR (split, 3)) | |
7445392c | 572 | { |
d2a3ce4e | 573 | print_md_ptr_loc (XSTR (split, 3)); |
7445392c RS |
574 | printf ("%s\n", XSTR (split, 3)); |
575 | } | |
65963943 RK |
576 | |
577 | /* Output code to copy the arguments back out of `operands' */ | |
e792559a | 578 | for (i = 0; i < stats.num_operand_vars; i++) |
60d3aec4 JJ |
579 | { |
580 | printf (" operand%d = operands[%d];\n", i, i); | |
581 | printf (" (void) operand%d;\n", i); | |
582 | } | |
65963943 | 583 | |
3beaff21 | 584 | gen_emit_seq (XVEC (split, 2), used); |
65963943 | 585 | |
2f937369 | 586 | /* Call `get_insns' to make a list of all the |
65963943 RK |
587 | insns emitted within this gen_... function. */ |
588 | ||
2f937369 | 589 | printf (" _val = get_insns ();\n"); |
65963943 RK |
590 | printf (" end_sequence ();\n"); |
591 | printf (" return _val;\n}\n\n"); | |
ab55f58c RH |
592 | |
593 | free (used); | |
65963943 RK |
594 | } |
595 | \f | |
596 | /* Write a function, `add_clobbers', that is given a PARALLEL of sufficient | |
597 | size for the insn and an INSN_CODE, and inserts the required CLOBBERs at | |
598 | the end of the vector. */ | |
599 | ||
600 | static void | |
7e51717c | 601 | output_add_clobbers (void) |
65963943 RK |
602 | { |
603 | struct clobber_pat *clobber; | |
e5f6a288 | 604 | struct clobber_ent *ent; |
65963943 RK |
605 | int i; |
606 | ||
6906ba40 | 607 | printf ("\n\nvoid\nadd_clobbers (rtx pattern ATTRIBUTE_UNUSED, int insn_code_number)\n"); |
65963943 | 608 | printf ("{\n"); |
65963943 RK |
609 | printf (" switch (insn_code_number)\n"); |
610 | printf (" {\n"); | |
611 | ||
612 | for (clobber = clobber_list; clobber; clobber = clobber->next) | |
613 | { | |
e5f6a288 RK |
614 | for (ent = clobber->insns; ent; ent = ent->next) |
615 | printf (" case %d:\n", ent->code_number); | |
65963943 RK |
616 | |
617 | for (i = clobber->first_clobber; i < XVECLEN (clobber->pattern, 1); i++) | |
618 | { | |
619 | printf (" XVECEXP (pattern, 0, %d) = ", i); | |
ede7cd44 | 620 | gen_exp (XVECEXP (clobber->pattern, 1, i), |
ab55f58c | 621 | GET_CODE (clobber->pattern), NULL); |
65963943 RK |
622 | printf (";\n"); |
623 | } | |
624 | ||
e5f6a288 | 625 | printf (" break;\n\n"); |
65963943 RK |
626 | } |
627 | ||
628 | printf (" default:\n"); | |
b2d59f6f | 629 | printf (" gcc_unreachable ();\n"); |
65963943 RK |
630 | printf (" }\n"); |
631 | printf ("}\n"); | |
632 | } | |
633 | \f | |
6327d36a RK |
634 | /* Write a function, `added_clobbers_hard_reg_p' that is given an insn_code |
635 | number that will have clobbers added (as indicated by `recog') and returns | |
636 | 1 if those include a clobber of a hard reg or 0 if all of them just clobber | |
637 | SCRATCH. */ | |
751aa7cc RK |
638 | |
639 | static void | |
3d7aafde | 640 | output_added_clobbers_hard_reg_p (void) |
751aa7cc RK |
641 | { |
642 | struct clobber_pat *clobber; | |
643 | struct clobber_ent *ent; | |
a29b099d | 644 | int clobber_p, used; |
751aa7cc | 645 | |
6906ba40 | 646 | printf ("\n\nint\nadded_clobbers_hard_reg_p (int insn_code_number)\n"); |
751aa7cc RK |
647 | printf ("{\n"); |
648 | printf (" switch (insn_code_number)\n"); | |
649 | printf (" {\n"); | |
650 | ||
651 | for (clobber_p = 0; clobber_p <= 1; clobber_p++) | |
652 | { | |
a29b099d | 653 | used = 0; |
751aa7cc RK |
654 | for (clobber = clobber_list; clobber; clobber = clobber->next) |
655 | if (clobber->has_hard_reg == clobber_p) | |
656 | for (ent = clobber->insns; ent; ent = ent->next) | |
a29b099d JJ |
657 | { |
658 | printf (" case %d:\n", ent->code_number); | |
659 | used++; | |
660 | } | |
751aa7cc | 661 | |
a29b099d JJ |
662 | if (used) |
663 | printf (" return %d;\n\n", clobber_p); | |
751aa7cc RK |
664 | } |
665 | ||
666 | printf (" default:\n"); | |
b2d59f6f | 667 | printf (" gcc_unreachable ();\n"); |
751aa7cc RK |
668 | printf (" }\n"); |
669 | printf ("}\n"); | |
670 | } | |
671 | \f | |
ede7cd44 | 672 | /* Generate code to invoke find_free_register () as needed for the |
dc297297 | 673 | scratch registers used by the peephole2 pattern in SPLIT. */ |
ede7cd44 RH |
674 | |
675 | static void | |
3d7aafde | 676 | output_peephole2_scratches (rtx split) |
ede7cd44 RH |
677 | { |
678 | int i; | |
679 | int insn_nr = 0; | |
f1ed99cd | 680 | bool first = true; |
ede7cd44 RH |
681 | |
682 | for (i = 0; i < XVECLEN (split, 0); i++) | |
683 | { | |
684 | rtx elt = XVECEXP (split, 0, i); | |
685 | if (GET_CODE (elt) == MATCH_SCRATCH) | |
686 | { | |
687 | int last_insn_nr = insn_nr; | |
688 | int cur_insn_nr = insn_nr; | |
689 | int j; | |
690 | for (j = i + 1; j < XVECLEN (split, 0); j++) | |
691 | if (GET_CODE (XVECEXP (split, 0, j)) == MATCH_DUP) | |
692 | { | |
693 | if (XINT (XVECEXP (split, 0, j), 0) == XINT (elt, 0)) | |
694 | last_insn_nr = cur_insn_nr; | |
695 | } | |
696 | else if (GET_CODE (XVECEXP (split, 0, j)) != MATCH_SCRATCH) | |
697 | cur_insn_nr++; | |
23280139 | 698 | |
f1ed99cd JJ |
699 | if (first) |
700 | { | |
701 | printf (" HARD_REG_SET _regs_allocated;\n"); | |
702 | printf (" CLEAR_HARD_REG_SET (_regs_allocated);\n"); | |
703 | first = false; | |
704 | } | |
705 | ||
23280139 | 706 | printf (" if ((operands[%d] = peep2_find_free_register (%d, %d, \"%s\", %smode, &_regs_allocated)) == NULL_RTX)\n\ |
3d7aafde | 707 | return NULL;\n", |
ede7cd44 | 708 | XINT (elt, 0), |
23280139 | 709 | insn_nr, last_insn_nr, |
ede7cd44 RH |
710 | XSTR (elt, 1), |
711 | GET_MODE_NAME (GET_MODE (elt))); | |
712 | ||
713 | } | |
714 | else if (GET_CODE (elt) != MATCH_DUP) | |
715 | insn_nr++; | |
716 | } | |
717 | } | |
65963943 | 718 | |
65963943 | 719 | int |
3d7aafde | 720 | main (int argc, char **argv) |
65963943 | 721 | { |
f8b6598e | 722 | progname = "genemit"; |
65963943 | 723 | |
600ab3fc | 724 | if (!init_rtx_reader_args (argc, argv)) |
c88c0d42 | 725 | return (FATAL_EXIT_CODE); |
65963943 | 726 | |
65963943 RK |
727 | /* Assign sequential codes to all entries in the machine description |
728 | in parallel with the tables in insn-output.c. */ | |
729 | ||
65963943 RK |
730 | printf ("/* Generated automatically by the program `genemit'\n\ |
731 | from the machine description file `md'. */\n\n"); | |
732 | ||
733 | printf ("#include \"config.h\"\n"); | |
729da3f5 | 734 | printf ("#include \"system.h\"\n"); |
4977bab6 | 735 | printf ("#include \"coretypes.h\"\n"); |
c7131fb2 | 736 | printf ("#include \"backend.h\"\n"); |
9fdcd34e | 737 | printf ("#include \"predict.h\"\n"); |
4d648807 | 738 | printf ("#include \"tree.h\"\n"); |
c7131fb2 AM |
739 | printf ("#include \"rtl.h\"\n"); |
740 | printf ("#include \"alias.h\"\n"); | |
d8a2d370 DN |
741 | printf ("#include \"varasm.h\"\n"); |
742 | printf ("#include \"stor-layout.h\"\n"); | |
743 | printf ("#include \"calls.h\"\n"); | |
6baf1cc8 | 744 | printf ("#include \"tm_p.h\"\n"); |
36566b39 | 745 | printf ("#include \"flags.h\"\n"); |
36566b39 PK |
746 | printf ("#include \"insn-config.h\"\n"); |
747 | printf ("#include \"expmed.h\"\n"); | |
748 | printf ("#include \"dojump.h\"\n"); | |
749 | printf ("#include \"explow.h\"\n"); | |
750 | printf ("#include \"emit-rtl.h\"\n"); | |
751 | printf ("#include \"stmt.h\"\n"); | |
65963943 | 752 | printf ("#include \"expr.h\"\n"); |
b0710fe1 | 753 | printf ("#include \"insn-codes.h\"\n"); |
e78d8e51 | 754 | printf ("#include \"optabs.h\"\n"); |
c413e1b5 | 755 | printf ("#include \"dfp.h\"\n"); |
65963943 | 756 | printf ("#include \"output.h\"\n"); |
23280139 | 757 | printf ("#include \"recog.h\"\n"); |
c7131fb2 | 758 | printf ("#include \"df.h\"\n"); |
ede7cd44 | 759 | printf ("#include \"resource.h\"\n"); |
d80eb1e1 | 760 | printf ("#include \"reload.h\"\n"); |
79a3f089 | 761 | printf ("#include \"diagnostic-core.h\"\n"); |
5abc5de9 | 762 | printf ("#include \"regs.h\"\n"); |
279bb624 | 763 | printf ("#include \"tm-constrs.h\"\n"); |
5abc5de9 | 764 | printf ("#include \"ggc.h\"\n"); |
eddcad13 | 765 | printf ("#include \"dumpfile.h\"\n"); |
3b1552c1 | 766 | printf ("#include \"target.h\"\n\n"); |
53bfe9cd | 767 | printf ("#define FAIL return (end_sequence (), _val)\n"); |
2f937369 | 768 | printf ("#define DONE return (_val = get_insns (), end_sequence (), _val)\n\n"); |
65963943 RK |
769 | |
770 | /* Read the machine description. */ | |
771 | ||
5d2d3e43 RS |
772 | md_rtx_info info; |
773 | while (read_md_rtx (&info)) | |
774 | switch (GET_CODE (info.def)) | |
775 | { | |
776 | case DEFINE_INSN: | |
777 | gen_insn (&info); | |
c88c0d42 | 778 | break; |
ede7cd44 | 779 | |
5d2d3e43 RS |
780 | case DEFINE_EXPAND: |
781 | printf ("/* %s:%d */\n", info.loc.filename, info.loc.lineno); | |
782 | gen_expand (&info); | |
783 | break; | |
821e35ba | 784 | |
5d2d3e43 RS |
785 | case DEFINE_SPLIT: |
786 | printf ("/* %s:%d */\n", info.loc.filename, info.loc.lineno); | |
787 | gen_split (&info); | |
788 | break; | |
821e35ba | 789 | |
5d2d3e43 RS |
790 | case DEFINE_PEEPHOLE2: |
791 | printf ("/* %s:%d */\n", info.loc.filename, info.loc.lineno); | |
792 | gen_split (&info); | |
793 | break; | |
821e35ba | 794 | |
5d2d3e43 RS |
795 | default: |
796 | break; | |
797 | } | |
65963943 | 798 | |
751aa7cc RK |
799 | /* Write out the routines to add CLOBBERs to a pattern and say whether they |
800 | clobber a hard reg. */ | |
65963943 | 801 | output_add_clobbers (); |
751aa7cc | 802 | output_added_clobbers_hard_reg_p (); |
65963943 | 803 | |
65963943 | 804 | fflush (stdout); |
c1b59dce | 805 | return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |
65963943 | 806 | } |