Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/alpha/predicates.md @ 63:b7f97abdc517 gcc-4.6-20100522
update gcc from gcc-4.5.0 to gcc-4.6
author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
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date | Mon, 24 May 2010 12:47:05 +0900 |
parents | 77e2b8dfacca |
children | f6334be47118 |
rev | line source |
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0 | 1 ;; Predicate definitions for DEC Alpha. |
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2 ;; Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 |
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3 ;; Free Software Foundation, Inc. |
0 | 4 ;; |
5 ;; This file is part of GCC. | |
6 ;; | |
7 ;; GCC is free software; you can redistribute it and/or modify | |
8 ;; it under the terms of the GNU General Public License as published by | |
9 ;; the Free Software Foundation; either version 3, or (at your option) | |
10 ;; any later version. | |
11 ;; | |
12 ;; GCC is distributed in the hope that it will be useful, | |
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 ;; GNU General Public License for more details. | |
16 ;; | |
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/>. | |
20 | |
21 ;; Return 1 if OP is the zero constant for MODE. | |
22 (define_predicate "const0_operand" | |
23 (and (match_code "const_int,const_double,const_vector") | |
24 (match_test "op == CONST0_RTX (mode)"))) | |
25 | |
26 ;; Returns true if OP is either the constant zero or a register. | |
27 (define_predicate "reg_or_0_operand" | |
28 (ior (match_operand 0 "register_operand") | |
29 (match_operand 0 "const0_operand"))) | |
30 | |
31 ;; Return 1 if OP is a constant in the range of 0-63 (for a shift) or | |
32 ;; any register. | |
33 (define_predicate "reg_or_6bit_operand" | |
34 (if_then_else (match_code "const_int") | |
35 (match_test "INTVAL (op) >= 0 && INTVAL (op) < 64") | |
36 (match_operand 0 "register_operand"))) | |
37 | |
38 ;; Return 1 if OP is an 8-bit constant. | |
39 (define_predicate "cint8_operand" | |
40 (and (match_code "const_int") | |
41 (match_test "INTVAL (op) >= 0 && INTVAL (op) < 256"))) | |
42 | |
43 ;; Return 1 if OP is an 8-bit constant or any register. | |
44 (define_predicate "reg_or_8bit_operand" | |
45 (if_then_else (match_code "const_int") | |
46 (match_test "INTVAL (op) >= 0 && INTVAL (op) < 256") | |
47 (match_operand 0 "register_operand"))) | |
48 | |
49 ;; Return 1 if OP is a constant or any register. | |
50 (define_predicate "reg_or_cint_operand" | |
51 (ior (match_operand 0 "register_operand") | |
52 (match_operand 0 "const_int_operand"))) | |
53 | |
54 ;; Return 1 if the operand is a valid second operand to an add insn. | |
55 (define_predicate "add_operand" | |
56 (if_then_else (match_code "const_int") | |
57 (match_test "satisfies_constraint_K (op) || satisfies_constraint_L (op)") | |
58 (match_operand 0 "register_operand"))) | |
59 | |
60 ;; Return 1 if the operand is a valid second operand to a | |
61 ;; sign-extending add insn. | |
62 (define_predicate "sext_add_operand" | |
63 (if_then_else (match_code "const_int") | |
64 (match_test "satisfies_constraint_I (op) || satisfies_constraint_O (op)") | |
65 (match_operand 0 "register_operand"))) | |
66 | |
67 ;; Return 1 if the operand is a non-symbolic constant operand that | |
68 ;; does not satisfy add_operand. | |
69 (define_predicate "non_add_const_operand" | |
70 (and (match_code "const_int,const_double,const_vector") | |
71 (not (match_operand 0 "add_operand")))) | |
72 | |
73 ;; Return 1 if the operand is a non-symbolic, nonzero constant operand. | |
74 (define_predicate "non_zero_const_operand" | |
75 (and (match_code "const_int,const_double,const_vector") | |
76 (match_test "op != CONST0_RTX (mode)"))) | |
77 | |
78 ;; Return 1 if OP is the constant 4 or 8. | |
79 (define_predicate "const48_operand" | |
80 (and (match_code "const_int") | |
81 (match_test "INTVAL (op) == 4 || INTVAL (op) == 8"))) | |
82 | |
83 ;; Return 1 if OP is a valid first operand to an AND insn. | |
84 (define_predicate "and_operand" | |
85 (if_then_else (match_code "const_int") | |
86 (match_test "(unsigned HOST_WIDE_INT) INTVAL (op) < 0x100 | |
87 || (unsigned HOST_WIDE_INT) ~ INTVAL (op) < 0x100 | |
88 || zap_mask (INTVAL (op))") | |
89 (if_then_else (match_code "const_double") | |
90 (match_test "GET_MODE (op) == VOIDmode | |
91 && zap_mask (CONST_DOUBLE_LOW (op)) | |
92 && zap_mask (CONST_DOUBLE_HIGH (op))") | |
93 (match_operand 0 "register_operand")))) | |
94 | |
95 ;; Return 1 if OP is a valid first operand to an IOR or XOR insn. | |
96 (define_predicate "or_operand" | |
97 (if_then_else (match_code "const_int") | |
98 (match_test "(unsigned HOST_WIDE_INT) INTVAL (op) < 0x100 | |
99 || (unsigned HOST_WIDE_INT) ~ INTVAL (op) < 0x100") | |
100 (match_operand 0 "register_operand"))) | |
101 | |
102 ;; Return 1 if OP is a constant that is the width, in bits, of an integral | |
103 ;; mode not larger than DImode. | |
104 (define_predicate "mode_width_operand" | |
105 (match_code "const_int") | |
106 { | |
107 HOST_WIDE_INT i = INTVAL (op); | |
108 return i == 8 || i == 16 || i == 32 || i == 64; | |
109 }) | |
110 | |
111 ;; Return 1 if OP is a constant that is a mask of ones of width of an | |
112 ;; integral machine mode not larger than DImode. | |
113 (define_predicate "mode_mask_operand" | |
114 (match_code "const_int,const_double") | |
115 { | |
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116 if (CONST_INT_P (op)) |
0 | 117 { |
118 HOST_WIDE_INT value = INTVAL (op); | |
119 | |
120 if (value == 0xff) | |
121 return 1; | |
122 if (value == 0xffff) | |
123 return 1; | |
124 if (value == 0xffffffff) | |
125 return 1; | |
126 if (value == -1) | |
127 return 1; | |
128 } | |
129 else if (HOST_BITS_PER_WIDE_INT == 32 && GET_CODE (op) == CONST_DOUBLE) | |
130 { | |
131 if (CONST_DOUBLE_LOW (op) == 0xffffffff && CONST_DOUBLE_HIGH (op) == 0) | |
132 return 1; | |
133 } | |
134 return 0; | |
135 }) | |
136 | |
137 ;; Return 1 if OP is a multiple of 8 less than 64. | |
138 (define_predicate "mul8_operand" | |
139 (match_code "const_int") | |
140 { | |
141 unsigned HOST_WIDE_INT i = INTVAL (op); | |
142 return i < 64 && i % 8 == 0; | |
143 }) | |
144 | |
145 ;; Return 1 if OP is a hard floating-point register. | |
146 (define_predicate "hard_fp_register_operand" | |
147 (match_operand 0 "register_operand") | |
148 { | |
149 if (GET_CODE (op) == SUBREG) | |
150 op = SUBREG_REG (op); | |
151 return REGNO_REG_CLASS (REGNO (op)) == FLOAT_REGS; | |
152 }) | |
153 | |
154 ;; Return 1 if OP is a hard general register. | |
155 (define_predicate "hard_int_register_operand" | |
156 (match_operand 0 "register_operand") | |
157 { | |
158 if (GET_CODE (op) == SUBREG) | |
159 op = SUBREG_REG (op); | |
160 return REGNO_REG_CLASS (REGNO (op)) == GENERAL_REGS; | |
161 }) | |
162 | |
163 ;; Return 1 if OP is something that can be reloaded into a register; | |
164 ;; if it is a MEM, it need not be valid. | |
165 (define_predicate "some_operand" | |
166 (ior (match_code "reg,mem,const_int,const_double,const_vector, | |
167 label_ref,symbol_ref,const,high") | |
168 (and (match_code "subreg") | |
169 (match_test "some_operand (SUBREG_REG (op), VOIDmode)")))) | |
170 | |
171 ;; Likewise, but don't accept constants. | |
172 (define_predicate "some_ni_operand" | |
173 (ior (match_code "reg,mem") | |
174 (and (match_code "subreg") | |
175 (match_test "some_ni_operand (SUBREG_REG (op), VOIDmode)")))) | |
176 | |
177 ;; Return 1 if OP is a valid operand for the source of a move insn. | |
178 (define_predicate "input_operand" | |
179 (match_code "label_ref,symbol_ref,const,high,reg,subreg,mem, | |
180 const_double,const_vector,const_int") | |
181 { | |
182 switch (GET_CODE (op)) | |
183 { | |
184 case LABEL_REF: | |
185 case SYMBOL_REF: | |
186 case CONST: | |
187 if (TARGET_EXPLICIT_RELOCS) | |
188 { | |
189 /* We don't split symbolic operands into something unintelligable | |
190 until after reload, but we do not wish non-small, non-global | |
191 symbolic operands to be reconstructed from their high/lo_sum | |
192 form. */ | |
193 return (small_symbolic_operand (op, mode) | |
194 || global_symbolic_operand (op, mode) | |
195 || gotdtp_symbolic_operand (op, mode) | |
196 || gottp_symbolic_operand (op, mode)); | |
197 } | |
198 | |
199 /* This handles both the Windows/NT and OSF cases. */ | |
200 return mode == ptr_mode || mode == DImode; | |
201 | |
202 case HIGH: | |
203 return (TARGET_EXPLICIT_RELOCS | |
204 && local_symbolic_operand (XEXP (op, 0), mode)); | |
205 | |
206 case REG: | |
207 return 1; | |
208 | |
209 case SUBREG: | |
210 if (register_operand (op, mode)) | |
211 return 1; | |
212 /* ... fall through ... */ | |
213 case MEM: | |
214 return ((TARGET_BWX || (mode != HImode && mode != QImode)) | |
215 && general_operand (op, mode)); | |
216 | |
217 case CONST_DOUBLE: | |
218 return op == CONST0_RTX (mode); | |
219 | |
220 case CONST_VECTOR: | |
221 if (reload_in_progress || reload_completed) | |
222 return alpha_legitimate_constant_p (op); | |
223 return op == CONST0_RTX (mode); | |
224 | |
225 case CONST_INT: | |
226 if (mode == QImode || mode == HImode) | |
227 return true; | |
228 if (reload_in_progress || reload_completed) | |
229 return alpha_legitimate_constant_p (op); | |
230 return add_operand (op, mode); | |
231 | |
232 default: | |
233 gcc_unreachable (); | |
234 } | |
235 return 0; | |
236 }) | |
237 | |
238 ;; Return 1 if OP is a SYMBOL_REF for a function known to be in this | |
239 ;; file, and in the same section as the current function. | |
240 | |
241 (define_predicate "samegp_function_operand" | |
242 (match_code "symbol_ref") | |
243 { | |
244 /* Easy test for recursion. */ | |
245 if (op == XEXP (DECL_RTL (current_function_decl), 0)) | |
246 return true; | |
247 | |
248 /* Functions that are not local can be overridden, and thus may | |
249 not share the same gp. */ | |
250 if (! SYMBOL_REF_LOCAL_P (op)) | |
251 return false; | |
252 | |
253 /* If -msmall-data is in effect, assume that there is only one GP | |
254 for the module, and so any local symbol has this property. We | |
255 need explicit relocations to be able to enforce this for symbols | |
256 not defined in this unit of translation, however. */ | |
257 if (TARGET_EXPLICIT_RELOCS && TARGET_SMALL_DATA) | |
258 return true; | |
259 | |
260 /* Functions that are not external are defined in this UoT, | |
261 and thus must share the same gp. */ | |
262 return ! SYMBOL_REF_EXTERNAL_P (op); | |
263 }) | |
264 | |
265 ;; Return 1 if OP is a SYMBOL_REF for which we can make a call via bsr. | |
266 (define_predicate "direct_call_operand" | |
267 (match_operand 0 "samegp_function_operand") | |
268 { | |
269 tree op_decl, cfun_sec, op_sec; | |
270 | |
271 /* If profiling is implemented via linker tricks, we can't jump | |
272 to the nogp alternate entry point. Note that crtl->profile | |
273 would not be correct, since that doesn't indicate if the target | |
274 function uses profiling. */ | |
275 /* ??? TARGET_PROFILING_NEEDS_GP isn't really the right test, | |
276 but is approximately correct for the OSF ABIs. Don't know | |
277 what to do for VMS, NT, or UMK. */ | |
278 if (!TARGET_PROFILING_NEEDS_GP && profile_flag) | |
279 return false; | |
280 | |
281 /* Must be a function. In some cases folks create thunks in static | |
282 data structures and then make calls to them. If we allow the | |
283 direct call, we'll get an error from the linker about !samegp reloc | |
284 against a symbol without a .prologue directive. */ | |
285 if (!SYMBOL_REF_FUNCTION_P (op)) | |
286 return false; | |
287 | |
288 /* Must be "near" so that the branch is assumed to reach. With | |
289 -msmall-text, this is assumed true of all local symbols. Since | |
290 we've already checked samegp, locality is already assured. */ | |
291 if (TARGET_SMALL_TEXT) | |
292 return true; | |
293 | |
294 /* Otherwise, a decl is "near" if it is defined in the same section. */ | |
295 if (flag_function_sections) | |
296 return false; | |
297 | |
298 op_decl = SYMBOL_REF_DECL (op); | |
299 if (DECL_ONE_ONLY (current_function_decl) | |
300 || (op_decl && DECL_ONE_ONLY (op_decl))) | |
301 return false; | |
302 | |
303 cfun_sec = DECL_SECTION_NAME (current_function_decl); | |
304 op_sec = op_decl ? DECL_SECTION_NAME (op_decl) : NULL; | |
305 return ((!cfun_sec && !op_sec) | |
306 || (cfun_sec && op_sec | |
307 && strcmp (TREE_STRING_POINTER (cfun_sec), | |
308 TREE_STRING_POINTER (op_sec)) == 0)); | |
309 }) | |
310 | |
311 ;; Return 1 if OP is a valid operand for the MEM of a CALL insn. | |
312 ;; | |
313 ;; For TARGET_ABI_OSF, we want to restrict to R27 or a pseudo. | |
314 ;; For TARGET_ABI_UNICOSMK, we want to restrict to registers. | |
315 | |
316 (define_predicate "call_operand" | |
317 (if_then_else (match_code "reg") | |
318 (match_test "!TARGET_ABI_OSF | |
319 || REGNO (op) == 27 || REGNO (op) > LAST_VIRTUAL_REGISTER") | |
320 (and (match_test "!TARGET_ABI_UNICOSMK") | |
321 (match_code "symbol_ref")))) | |
322 | |
323 ;; Return true if OP is a LABEL_REF, or SYMBOL_REF or CONST referencing | |
324 ;; a (non-tls) variable known to be defined in this file. | |
325 (define_predicate "local_symbolic_operand" | |
326 (match_code "label_ref,const,symbol_ref") | |
327 { | |
328 if (GET_CODE (op) == CONST | |
329 && GET_CODE (XEXP (op, 0)) == PLUS | |
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330 && CONST_INT_P (XEXP (XEXP (op, 0), 1))) |
0 | 331 op = XEXP (XEXP (op, 0), 0); |
332 | |
333 if (GET_CODE (op) == LABEL_REF) | |
334 return 1; | |
335 | |
336 if (GET_CODE (op) != SYMBOL_REF) | |
337 return 0; | |
338 | |
339 return (SYMBOL_REF_LOCAL_P (op) | |
340 && !SYMBOL_REF_WEAK (op) | |
341 && !SYMBOL_REF_TLS_MODEL (op)); | |
342 }) | |
343 | |
344 ;; Return true if OP is a SYMBOL_REF or CONST referencing a variable | |
345 ;; known to be defined in this file in the small data area. | |
346 (define_predicate "small_symbolic_operand" | |
347 (match_code "const,symbol_ref") | |
348 { | |
349 if (! TARGET_SMALL_DATA) | |
350 return 0; | |
351 | |
352 if (GET_CODE (op) == CONST | |
353 && GET_CODE (XEXP (op, 0)) == PLUS | |
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354 && CONST_INT_P (XEXP (XEXP (op, 0), 1))) |
0 | 355 op = XEXP (XEXP (op, 0), 0); |
356 | |
357 if (GET_CODE (op) != SYMBOL_REF) | |
358 return 0; | |
359 | |
360 /* ??? There's no encode_section_info equivalent for the rtl | |
361 constant pool, so SYMBOL_FLAG_SMALL never gets set. */ | |
362 if (CONSTANT_POOL_ADDRESS_P (op)) | |
363 return GET_MODE_SIZE (get_pool_mode (op)) <= g_switch_value; | |
364 | |
365 return (SYMBOL_REF_LOCAL_P (op) | |
366 && SYMBOL_REF_SMALL_P (op) | |
367 && !SYMBOL_REF_WEAK (op) | |
368 && !SYMBOL_REF_TLS_MODEL (op)); | |
369 }) | |
370 | |
371 ;; Return true if OP is a SYMBOL_REF or CONST referencing a variable | |
372 ;; not known (or known not) to be defined in this file. | |
373 (define_predicate "global_symbolic_operand" | |
374 (match_code "const,symbol_ref") | |
375 { | |
376 if (GET_CODE (op) == CONST | |
377 && GET_CODE (XEXP (op, 0)) == PLUS | |
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378 && CONST_INT_P (XEXP (XEXP (op, 0), 1))) |
0 | 379 op = XEXP (XEXP (op, 0), 0); |
380 | |
381 if (GET_CODE (op) != SYMBOL_REF) | |
382 return 0; | |
383 | |
384 return ((!SYMBOL_REF_LOCAL_P (op) || SYMBOL_REF_WEAK (op)) | |
385 && !SYMBOL_REF_TLS_MODEL (op)); | |
386 }) | |
387 | |
388 ;; Returns 1 if OP is a symbolic operand, i.e. a symbol_ref or a label_ref, | |
389 ;; possibly with an offset. | |
390 (define_predicate "symbolic_operand" | |
391 (ior (match_code "symbol_ref,label_ref") | |
392 (and (match_code "const") | |
393 (match_test "GET_CODE (XEXP (op,0)) == PLUS | |
394 && (GET_CODE (XEXP (XEXP (op,0), 0)) == SYMBOL_REF | |
395 || GET_CODE (XEXP (XEXP (op,0), 0)) == LABEL_REF) | |
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396 && CONST_INT_P (XEXP (XEXP (op,0), 1))")))) |
0 | 397 |
398 ;; Return true if OP is valid for 16-bit DTP relative relocations. | |
399 (define_predicate "dtp16_symbolic_operand" | |
400 (and (match_code "const") | |
401 (match_test "tls_symbolic_operand_1 (op, 16, UNSPEC_DTPREL)"))) | |
402 | |
403 ;; Return true if OP is valid for 32-bit DTP relative relocations. | |
404 (define_predicate "dtp32_symbolic_operand" | |
405 (and (match_code "const") | |
406 (match_test "tls_symbolic_operand_1 (op, 32, UNSPEC_DTPREL)"))) | |
407 | |
408 ;; Return true if OP is valid for 64-bit DTP relative relocations. | |
409 (define_predicate "gotdtp_symbolic_operand" | |
410 (and (match_code "const") | |
411 (match_test "tls_symbolic_operand_1 (op, 64, UNSPEC_DTPREL)"))) | |
412 | |
413 ;; Return true if OP is valid for 16-bit TP relative relocations. | |
414 (define_predicate "tp16_symbolic_operand" | |
415 (and (match_code "const") | |
416 (match_test "tls_symbolic_operand_1 (op, 16, UNSPEC_TPREL)"))) | |
417 | |
418 ;; Return true if OP is valid for 32-bit TP relative relocations. | |
419 (define_predicate "tp32_symbolic_operand" | |
420 (and (match_code "const") | |
421 (match_test "tls_symbolic_operand_1 (op, 32, UNSPEC_TPREL)"))) | |
422 | |
423 ;; Return true if OP is valid for 64-bit TP relative relocations. | |
424 (define_predicate "gottp_symbolic_operand" | |
425 (and (match_code "const") | |
426 (match_test "tls_symbolic_operand_1 (op, 64, UNSPEC_TPREL)"))) | |
427 | |
428 ;; Return 1 if this memory address is a known aligned register plus | |
429 ;; a constant. It must be a valid address. This means that we can do | |
430 ;; this as an aligned reference plus some offset. | |
431 ;; | |
432 ;; Take into account what reload will do. Oh god this is awful. | |
433 ;; The horrible comma-operator construct below is to prevent genrecog | |
434 ;; from thinking that this predicate accepts REG and SUBREG. We don't | |
435 ;; use recog during reload, so pretending these codes are accepted | |
436 ;; pessimizes things a tad. | |
437 | |
438 (define_special_predicate "aligned_memory_operand" | |
439 (ior (match_test "op = resolve_reload_operand (op), 0") | |
440 (match_code "mem")) | |
441 { | |
442 rtx base; | |
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443 int offset; |
0 | 444 |
445 if (MEM_ALIGN (op) >= 32) | |
446 return 1; | |
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447 |
0 | 448 op = XEXP (op, 0); |
449 | |
450 /* LEGITIMIZE_RELOAD_ADDRESS creates (plus (plus reg const_hi) const_lo) | |
451 sorts of constructs. Dig for the real base register. */ | |
452 if (reload_in_progress | |
453 && GET_CODE (op) == PLUS | |
454 && GET_CODE (XEXP (op, 0)) == PLUS) | |
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455 { |
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456 base = XEXP (XEXP (op, 0), 0); |
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457 offset = INTVAL (XEXP (op, 1)); |
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458 } |
0 | 459 else |
460 { | |
461 if (! memory_address_p (mode, op)) | |
462 return 0; | |
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463 if (GET_CODE (op) == PLUS) |
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464 { |
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465 base = XEXP (op, 0); |
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466 offset = INTVAL (XEXP (op, 1)); |
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467 } |
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468 else |
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469 { |
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470 base = op; |
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471 offset = 0; |
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472 } |
0 | 473 } |
474 | |
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475 if (offset % GET_MODE_SIZE (mode)) |
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476 return 0; |
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477 |
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478 return (REG_P (base) && REGNO_POINTER_ALIGN (REGNO (base)) >= 32); |
0 | 479 }) |
480 | |
481 ;; Similar, but return 1 if OP is a MEM which is not alignable. | |
482 | |
483 (define_special_predicate "unaligned_memory_operand" | |
484 (ior (match_test "op = resolve_reload_operand (op), 0") | |
485 (match_code "mem")) | |
486 { | |
487 rtx base; | |
63
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488 int offset; |
0 | 489 |
490 if (MEM_ALIGN (op) >= 32) | |
491 return 0; | |
63
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492 |
0 | 493 op = XEXP (op, 0); |
494 | |
495 /* LEGITIMIZE_RELOAD_ADDRESS creates (plus (plus reg const_hi) const_lo) | |
496 sorts of constructs. Dig for the real base register. */ | |
497 if (reload_in_progress | |
498 && GET_CODE (op) == PLUS | |
499 && GET_CODE (XEXP (op, 0)) == PLUS) | |
63
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500 { |
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501 base = XEXP (XEXP (op, 0), 0); |
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502 offset = INTVAL (XEXP (op, 1)); |
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503 } |
0 | 504 else |
505 { | |
506 if (! memory_address_p (mode, op)) | |
507 return 0; | |
63
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508 if (GET_CODE (op) == PLUS) |
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509 { |
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510 base = XEXP (op, 0); |
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511 offset = INTVAL (XEXP (op, 1)); |
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512 } |
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513 else |
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514 { |
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515 base = op; |
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516 offset = 0; |
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517 } |
0 | 518 } |
519 | |
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520 if (offset % GET_MODE_SIZE (mode)) |
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521 return 1; |
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522 |
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523 return (REG_P (base) && REGNO_POINTER_ALIGN (REGNO (base)) < 32); |
0 | 524 }) |
525 | |
526 ;; Return 1 if OP is any memory location. During reload a pseudo matches. | |
527 (define_special_predicate "any_memory_operand" | |
528 (match_code "mem,reg,subreg") | |
529 { | |
530 if (GET_CODE (op) == SUBREG) | |
531 op = SUBREG_REG (op); | |
532 | |
533 if (MEM_P (op)) | |
534 return true; | |
535 if (reload_in_progress && REG_P (op)) | |
536 { | |
537 unsigned regno = REGNO (op); | |
538 if (HARD_REGISTER_NUM_P (regno)) | |
539 return false; | |
540 else | |
541 return reg_renumber[regno] < 0; | |
542 } | |
543 | |
544 return false; | |
545 }) | |
546 | |
547 ;; Return 1 is OP is a memory location that is not a reference | |
548 ;; (using an AND) to an unaligned location. Take into account | |
549 ;; what reload will do. | |
550 (define_special_predicate "normal_memory_operand" | |
551 (ior (match_test "op = resolve_reload_operand (op), 0") | |
552 (and (match_code "mem") | |
553 (match_test "GET_CODE (XEXP (op, 0)) != AND")))) | |
554 | |
555 ;; Returns 1 if OP is not an eliminable register. | |
556 ;; | |
557 ;; This exists to cure a pathological failure in the s8addq (et al) patterns, | |
558 ;; | |
559 ;; long foo () { long t; bar(); return (long) &t * 26107; } | |
560 ;; | |
561 ;; which run afoul of a hack in reload to cure a (presumably) similar | |
562 ;; problem with lea-type instructions on other targets. But there is | |
563 ;; one of us and many of them, so work around the problem by selectively | |
564 ;; preventing combine from making the optimization. | |
565 | |
566 (define_predicate "reg_not_elim_operand" | |
567 (match_operand 0 "register_operand") | |
568 { | |
569 if (GET_CODE (op) == SUBREG) | |
570 op = SUBREG_REG (op); | |
571 return op != frame_pointer_rtx && op != arg_pointer_rtx; | |
572 }) | |
573 | |
574 ;; Accept a register, but not a subreg of any kind. This allows us to | |
575 ;; avoid pathological cases in reload wrt data movement common in | |
576 ;; int->fp conversion. */ | |
577 (define_predicate "reg_no_subreg_operand" | |
578 (and (match_code "reg") | |
579 (match_operand 0 "register_operand"))) | |
580 | |
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581 ;; Return 1 if OP is a valid Alpha comparison operator for "cbranch" |
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582 ;; instructions. |
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583 (define_predicate "alpha_cbranch_operator" |
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584 (ior (match_operand 0 "ordered_comparison_operator") |
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585 (match_code "ordered,unordered"))) |
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586 |
0 | 587 ;; Return 1 if OP is a valid Alpha comparison operator for "cmp" style |
588 ;; instructions. | |
589 (define_predicate "alpha_comparison_operator" | |
590 (match_code "eq,le,lt,leu,ltu")) | |
591 | |
592 ;; Similarly, but with swapped operands. | |
593 (define_predicate "alpha_swapped_comparison_operator" | |
594 (match_code "eq,ge,gt,gtu")) | |
595 | |
596 ;; Return 1 if OP is a valid Alpha comparison operator against zero | |
597 ;; for "bcc" style instructions. | |
598 (define_predicate "alpha_zero_comparison_operator" | |
599 (match_code "eq,ne,le,lt,leu,ltu")) | |
600 | |
601 ;; Return 1 if OP is a signed comparison operation. | |
602 (define_predicate "signed_comparison_operator" | |
603 (match_code "eq,ne,le,lt,ge,gt")) | |
604 | |
605 ;; Return 1 if OP is a valid Alpha floating point comparison operator. | |
606 (define_predicate "alpha_fp_comparison_operator" | |
607 (match_code "eq,le,lt,unordered")) | |
608 | |
609 ;; Return 1 if this is a divide or modulus operator. | |
610 (define_predicate "divmod_operator" | |
611 (match_code "div,mod,udiv,umod")) | |
612 | |
613 ;; Return 1 if this is a float->int conversion operator. | |
614 (define_predicate "fix_operator" | |
615 (match_code "fix,unsigned_fix")) | |
616 | |
617 ;; Recognize an addition operation that includes a constant. Used to | |
618 ;; convince reload to canonize (plus (plus reg c1) c2) during register | |
619 ;; elimination. | |
620 | |
621 (define_predicate "addition_operation" | |
622 (and (match_code "plus") | |
623 (match_test "register_operand (XEXP (op, 0), mode) | |
624 && satisfies_constraint_K (XEXP (op, 1))"))) | |
625 | |
626 ;; For TARGET_EXPLICIT_RELOCS, we don't obfuscate a SYMBOL_REF to a | |
627 ;; small symbolic operand until after reload. At which point we need | |
628 ;; to replace (mem (symbol_ref)) with (mem (lo_sum $29 symbol_ref)) | |
629 ;; so that sched2 has the proper dependency information. */ | |
630 (define_predicate "some_small_symbolic_operand" | |
631 (match_code "set,parallel,prefetch,unspec,unspec_volatile") | |
632 { | |
633 /* Avoid search unless necessary. */ | |
634 if (!TARGET_EXPLICIT_RELOCS || !reload_completed) | |
635 return false; | |
636 return for_each_rtx (&op, some_small_symbolic_operand_int, NULL); | |
637 }) |