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53800dbe | 1 | /* Expand builtin functions. |
61f1dccc | 2 | Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
3 | 2000, 2001, 2002, 2003 Free Software Foundation, Inc. | |
53800dbe | 4 | |
f12b58b3 | 5 | This file is part of GCC. |
53800dbe | 6 | |
f12b58b3 | 7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
53800dbe | 11 | |
f12b58b3 | 12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
53800dbe | 16 | |
17 | You should have received a copy of the GNU General Public License | |
f12b58b3 | 18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
53800dbe | 21 | |
22 | #include "config.h" | |
23 | #include "system.h" | |
805e22b2 | 24 | #include "coretypes.h" |
25 | #include "tm.h" | |
53800dbe | 26 | #include "machmode.h" |
ef258422 | 27 | #include "real.h" |
53800dbe | 28 | #include "rtl.h" |
29 | #include "tree.h" | |
53800dbe | 30 | #include "flags.h" |
31 | #include "regs.h" | |
32 | #include "hard-reg-set.h" | |
33 | #include "except.h" | |
34 | #include "function.h" | |
53800dbe | 35 | #include "insn-config.h" |
36 | #include "expr.h" | |
d8fc4d0b | 37 | #include "optabs.h" |
38 | #include "libfuncs.h" | |
53800dbe | 39 | #include "recog.h" |
40 | #include "output.h" | |
41 | #include "typeclass.h" | |
53800dbe | 42 | #include "toplev.h" |
689df48e | 43 | #include "predict.h" |
1dd6c958 | 44 | #include "tm_p.h" |
fc2a2dcb | 45 | #include "target.h" |
63c62881 | 46 | #include "langhooks.h" |
53800dbe | 47 | |
48 | #define CALLED_AS_BUILT_IN(NODE) \ | |
49 | (!strncmp (IDENTIFIER_POINTER (DECL_NAME (NODE)), "__builtin_", 10)) | |
50 | ||
53800dbe | 51 | /* Register mappings for target machines without register windows. */ |
52 | #ifndef INCOMING_REGNO | |
53 | #define INCOMING_REGNO(OUT) (OUT) | |
54 | #endif | |
55 | #ifndef OUTGOING_REGNO | |
56 | #define OUTGOING_REGNO(IN) (IN) | |
57 | #endif | |
58 | ||
726e2588 | 59 | #ifndef PAD_VARARGS_DOWN |
60 | #define PAD_VARARGS_DOWN BYTES_BIG_ENDIAN | |
61 | #endif | |
62 | ||
ab7943b9 | 63 | /* Define the names of the builtin function types and codes. */ |
8934cb0c | 64 | const char *const built_in_class_names[4] |
ab7943b9 | 65 | = {"NOT_BUILT_IN", "BUILT_IN_FRONTEND", "BUILT_IN_MD", "BUILT_IN_NORMAL"}; |
66 | ||
0a68165a | 67 | #define DEF_BUILTIN(X, N, C, T, LT, B, F, NA, AT, IM) STRINGX(X), |
8934cb0c | 68 | const char *const built_in_names[(int) END_BUILTINS] = |
4e9d90c7 | 69 | { |
70 | #include "builtins.def" | |
71 | }; | |
72 | #undef DEF_BUILTIN | |
ab7943b9 | 73 | |
df94cd3b | 74 | /* Setup an array of _DECL trees, make sure each element is |
75 | initialized to NULL_TREE. */ | |
d2d4bdde | 76 | tree built_in_decls[(int) END_BUILTINS]; |
0a68165a | 77 | /* Declarations used when constructing the builtin implicitly in the compiler. |
78 | It may be NULL_TREE when this is invalid (for instance runtime is not | |
79 | required to implement the function call in all cases. */ | |
80 | tree implicit_built_in_decls[(int) END_BUILTINS]; | |
df94cd3b | 81 | |
27d0c333 | 82 | static int get_pointer_alignment PARAMS ((tree, unsigned int)); |
6bcfea9e | 83 | static tree c_strlen PARAMS ((tree)); |
83d79705 | 84 | static const char *c_getstr PARAMS ((tree)); |
6840589f | 85 | static rtx c_readstr PARAMS ((const char *, |
86 | enum machine_mode)); | |
bf8e3599 | 87 | static int target_char_cast PARAMS ((tree, char *)); |
6bcfea9e | 88 | static rtx get_memory_rtx PARAMS ((tree)); |
89 | static int apply_args_size PARAMS ((void)); | |
90 | static int apply_result_size PARAMS ((void)); | |
d8c9779c | 91 | #if defined (HAVE_untyped_call) || defined (HAVE_untyped_return) |
6bcfea9e | 92 | static rtx result_vector PARAMS ((int, rtx)); |
d8c9779c | 93 | #endif |
6b7f6858 | 94 | static rtx expand_builtin_setjmp PARAMS ((tree, rtx)); |
5e3608d8 | 95 | static void expand_builtin_prefetch PARAMS ((tree)); |
6bcfea9e | 96 | static rtx expand_builtin_apply_args PARAMS ((void)); |
97 | static rtx expand_builtin_apply_args_1 PARAMS ((void)); | |
98 | static rtx expand_builtin_apply PARAMS ((rtx, rtx, rtx)); | |
99 | static void expand_builtin_return PARAMS ((rtx)); | |
0608064e | 100 | static enum type_class type_to_class PARAMS ((tree)); |
6bcfea9e | 101 | static rtx expand_builtin_classify_type PARAMS ((tree)); |
0fd605a5 | 102 | static void expand_errno_check PARAMS ((tree, rtx)); |
6bcfea9e | 103 | static rtx expand_builtin_mathfn PARAMS ((tree, rtx, rtx)); |
0fd605a5 | 104 | static rtx expand_builtin_mathfn_2 PARAMS ((tree, rtx, rtx)); |
6bcfea9e | 105 | static rtx expand_builtin_constant_p PARAMS ((tree)); |
106 | static rtx expand_builtin_args_info PARAMS ((tree)); | |
107 | static rtx expand_builtin_next_arg PARAMS ((tree)); | |
7ccc713a | 108 | static rtx expand_builtin_va_start PARAMS ((tree)); |
6bcfea9e | 109 | static rtx expand_builtin_va_end PARAMS ((tree)); |
110 | static rtx expand_builtin_va_copy PARAMS ((tree)); | |
6f428e8b | 111 | static rtx expand_builtin_memcmp PARAMS ((tree, tree, rtx, |
9342ee68 | 112 | enum machine_mode)); |
83d79705 | 113 | static rtx expand_builtin_strcmp PARAMS ((tree, rtx, |
114 | enum machine_mode)); | |
ed09096d | 115 | static rtx expand_builtin_strncmp PARAMS ((tree, rtx, |
116 | enum machine_mode)); | |
6840589f | 117 | static rtx builtin_memcpy_read_str PARAMS ((PTR, HOST_WIDE_INT, |
118 | enum machine_mode)); | |
49f0327b | 119 | static rtx expand_builtin_strcat PARAMS ((tree, rtx, |
120 | enum machine_mode)); | |
121 | static rtx expand_builtin_strncat PARAMS ((tree, rtx, | |
122 | enum machine_mode)); | |
123 | static rtx expand_builtin_strspn PARAMS ((tree, rtx, | |
124 | enum machine_mode)); | |
125 | static rtx expand_builtin_strcspn PARAMS ((tree, rtx, | |
126 | enum machine_mode)); | |
6f428e8b | 127 | static rtx expand_builtin_memcpy PARAMS ((tree, rtx, |
3b824fa6 | 128 | enum machine_mode, int)); |
6f428e8b | 129 | static rtx expand_builtin_strcpy PARAMS ((tree, rtx, |
9342ee68 | 130 | enum machine_mode)); |
3b824fa6 | 131 | static rtx expand_builtin_stpcpy PARAMS ((tree, rtx, |
132 | enum machine_mode)); | |
6840589f | 133 | static rtx builtin_strncpy_read_str PARAMS ((PTR, HOST_WIDE_INT, |
134 | enum machine_mode)); | |
ed09096d | 135 | static rtx expand_builtin_strncpy PARAMS ((tree, rtx, |
136 | enum machine_mode)); | |
ecc318ff | 137 | static rtx builtin_memset_read_str PARAMS ((PTR, HOST_WIDE_INT, |
138 | enum machine_mode)); | |
a7ec6974 | 139 | static rtx builtin_memset_gen_str PARAMS ((PTR, HOST_WIDE_INT, |
140 | enum machine_mode)); | |
6f428e8b | 141 | static rtx expand_builtin_memset PARAMS ((tree, rtx, |
9342ee68 | 142 | enum machine_mode)); |
ffc83088 | 143 | static rtx expand_builtin_bzero PARAMS ((tree)); |
aed0bd19 | 144 | static rtx expand_builtin_strlen PARAMS ((tree, rtx)); |
17f5ea87 | 145 | static rtx expand_builtin_strstr PARAMS ((tree, rtx, |
146 | enum machine_mode)); | |
46f3a74a | 147 | static rtx expand_builtin_strpbrk PARAMS ((tree, rtx, |
148 | enum machine_mode)); | |
83d79705 | 149 | static rtx expand_builtin_strchr PARAMS ((tree, rtx, |
150 | enum machine_mode)); | |
151 | static rtx expand_builtin_strrchr PARAMS ((tree, rtx, | |
152 | enum machine_mode)); | |
6bcfea9e | 153 | static rtx expand_builtin_alloca PARAMS ((tree, rtx)); |
efb070c8 | 154 | static rtx expand_builtin_unop PARAMS ((enum machine_mode, |
155 | tree, rtx, rtx, optab)); | |
6bcfea9e | 156 | static rtx expand_builtin_frame_address PARAMS ((tree)); |
c013a46e | 157 | static rtx expand_builtin_fputs PARAMS ((tree, int, int)); |
6bcfea9e | 158 | static tree stabilize_va_list PARAMS ((tree, int)); |
89cfe6e5 | 159 | static rtx expand_builtin_expect PARAMS ((tree, rtx)); |
650e4c94 | 160 | static tree fold_builtin_constant_p PARAMS ((tree)); |
539a3a92 | 161 | static tree fold_builtin_classify_type PARAMS ((tree)); |
92c43e3c | 162 | static tree fold_builtin_inf PARAMS ((tree, int)); |
b0db7939 | 163 | static tree fold_builtin_nan PARAMS ((tree, tree, int)); |
0eb671f7 | 164 | static int validate_arglist PARAMS ((tree, ...)); |
6528f4f4 | 165 | static tree fold_trunc_transparent_mathfn PARAMS ((tree)); |
53800dbe | 166 | |
167 | /* Return the alignment in bits of EXP, a pointer valued expression. | |
168 | But don't return more than MAX_ALIGN no matter what. | |
169 | The alignment returned is, by default, the alignment of the thing that | |
27d0c333 | 170 | EXP points to. If it is not a POINTER_TYPE, 0 is returned. |
53800dbe | 171 | |
172 | Otherwise, look at the expression to see if we can do better, i.e., if the | |
173 | expression is actually pointing at an object whose alignment is tighter. */ | |
174 | ||
175 | static int | |
176 | get_pointer_alignment (exp, max_align) | |
177 | tree exp; | |
27d0c333 | 178 | unsigned int max_align; |
53800dbe | 179 | { |
27d0c333 | 180 | unsigned int align, inner; |
53800dbe | 181 | |
182 | if (TREE_CODE (TREE_TYPE (exp)) != POINTER_TYPE) | |
183 | return 0; | |
184 | ||
185 | align = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp))); | |
186 | align = MIN (align, max_align); | |
187 | ||
188 | while (1) | |
189 | { | |
190 | switch (TREE_CODE (exp)) | |
191 | { | |
192 | case NOP_EXPR: | |
193 | case CONVERT_EXPR: | |
194 | case NON_LVALUE_EXPR: | |
195 | exp = TREE_OPERAND (exp, 0); | |
196 | if (TREE_CODE (TREE_TYPE (exp)) != POINTER_TYPE) | |
197 | return align; | |
325d1c45 | 198 | |
53800dbe | 199 | inner = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp))); |
200 | align = MIN (inner, max_align); | |
201 | break; | |
202 | ||
203 | case PLUS_EXPR: | |
204 | /* If sum of pointer + int, restrict our maximum alignment to that | |
205 | imposed by the integer. If not, we can't do any better than | |
206 | ALIGN. */ | |
325d1c45 | 207 | if (! host_integerp (TREE_OPERAND (exp, 1), 1)) |
53800dbe | 208 | return align; |
209 | ||
0994d2ed | 210 | while (((tree_low_cst (TREE_OPERAND (exp, 1), 1)) |
211 | & (max_align / BITS_PER_UNIT - 1)) | |
53800dbe | 212 | != 0) |
213 | max_align >>= 1; | |
214 | ||
215 | exp = TREE_OPERAND (exp, 0); | |
216 | break; | |
217 | ||
218 | case ADDR_EXPR: | |
219 | /* See what we are pointing at and look at its alignment. */ | |
220 | exp = TREE_OPERAND (exp, 0); | |
221 | if (TREE_CODE (exp) == FUNCTION_DECL) | |
222 | align = FUNCTION_BOUNDARY; | |
9308e976 | 223 | else if (DECL_P (exp)) |
53800dbe | 224 | align = DECL_ALIGN (exp); |
225 | #ifdef CONSTANT_ALIGNMENT | |
226 | else if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'c') | |
227 | align = CONSTANT_ALIGNMENT (exp, align); | |
228 | #endif | |
229 | return MIN (align, max_align); | |
230 | ||
231 | default: | |
232 | return align; | |
233 | } | |
234 | } | |
235 | } | |
236 | ||
237 | /* Compute the length of a C string. TREE_STRING_LENGTH is not the right | |
238 | way, because it could contain a zero byte in the middle. | |
239 | TREE_STRING_LENGTH is the size of the character array, not the string. | |
240 | ||
902de8ed | 241 | The value returned is of type `ssizetype'. |
242 | ||
53800dbe | 243 | Unfortunately, string_constant can't access the values of const char |
244 | arrays with initializers, so neither can we do so here. */ | |
245 | ||
246 | static tree | |
247 | c_strlen (src) | |
248 | tree src; | |
249 | { | |
250 | tree offset_node; | |
27d0c333 | 251 | HOST_WIDE_INT offset; |
252 | int max; | |
44acf429 | 253 | const char *ptr; |
53800dbe | 254 | |
255 | src = string_constant (src, &offset_node); | |
256 | if (src == 0) | |
257 | return 0; | |
902de8ed | 258 | |
83d79705 | 259 | max = TREE_STRING_LENGTH (src) - 1; |
53800dbe | 260 | ptr = TREE_STRING_POINTER (src); |
902de8ed | 261 | |
53800dbe | 262 | if (offset_node && TREE_CODE (offset_node) != INTEGER_CST) |
263 | { | |
264 | /* If the string has an internal zero byte (e.g., "foo\0bar"), we can't | |
265 | compute the offset to the following null if we don't know where to | |
266 | start searching for it. */ | |
267 | int i; | |
902de8ed | 268 | |
53800dbe | 269 | for (i = 0; i < max; i++) |
270 | if (ptr[i] == 0) | |
271 | return 0; | |
902de8ed | 272 | |
53800dbe | 273 | /* We don't know the starting offset, but we do know that the string |
274 | has no internal zero bytes. We can assume that the offset falls | |
275 | within the bounds of the string; otherwise, the programmer deserves | |
276 | what he gets. Subtract the offset from the length of the string, | |
902de8ed | 277 | and return that. This would perhaps not be valid if we were dealing |
278 | with named arrays in addition to literal string constants. */ | |
279 | ||
280 | return size_diffop (size_int (max), offset_node); | |
53800dbe | 281 | } |
282 | ||
283 | /* We have a known offset into the string. Start searching there for | |
27d0c333 | 284 | a null character if we can represent it as a single HOST_WIDE_INT. */ |
dabc4084 | 285 | if (offset_node == 0) |
53800dbe | 286 | offset = 0; |
dabc4084 | 287 | else if (! host_integerp (offset_node, 0)) |
288 | offset = -1; | |
53800dbe | 289 | else |
27d0c333 | 290 | offset = tree_low_cst (offset_node, 0); |
902de8ed | 291 | |
53800dbe | 292 | /* If the offset is known to be out of bounds, warn, and call strlen at |
293 | runtime. */ | |
294 | if (offset < 0 || offset > max) | |
295 | { | |
296 | warning ("offset outside bounds of constant string"); | |
297 | return 0; | |
298 | } | |
902de8ed | 299 | |
53800dbe | 300 | /* Use strlen to search for the first zero byte. Since any strings |
301 | constructed with build_string will have nulls appended, we win even | |
302 | if we get handed something like (char[4])"abcd". | |
303 | ||
304 | Since OFFSET is our starting index into the string, no further | |
305 | calculation is needed. */ | |
902de8ed | 306 | return ssize_int (strlen (ptr + offset)); |
53800dbe | 307 | } |
308 | ||
83d79705 | 309 | /* Return a char pointer for a C string if it is a string constant |
310 | or sum of string constant and integer constant. */ | |
311 | ||
312 | static const char * | |
313 | c_getstr (src) | |
314 | tree src; | |
315 | { | |
316 | tree offset_node; | |
83d79705 | 317 | |
318 | src = string_constant (src, &offset_node); | |
319 | if (src == 0) | |
320 | return 0; | |
321 | ||
8c85fcb7 | 322 | if (offset_node == 0) |
323 | return TREE_STRING_POINTER (src); | |
324 | else if (!host_integerp (offset_node, 1) | |
325 | || compare_tree_int (offset_node, TREE_STRING_LENGTH (src) - 1) > 0) | |
83d79705 | 326 | return 0; |
83d79705 | 327 | |
8c85fcb7 | 328 | return TREE_STRING_POINTER (src) + tree_low_cst (offset_node, 1); |
83d79705 | 329 | } |
330 | ||
8c85fcb7 | 331 | /* Return a CONST_INT or CONST_DOUBLE corresponding to target reading |
332 | GET_MODE_BITSIZE (MODE) bits from string constant STR. */ | |
ecc318ff | 333 | |
6840589f | 334 | static rtx |
335 | c_readstr (str, mode) | |
336 | const char *str; | |
337 | enum machine_mode mode; | |
338 | { | |
339 | HOST_WIDE_INT c[2]; | |
340 | HOST_WIDE_INT ch; | |
341 | unsigned int i, j; | |
342 | ||
343 | if (GET_MODE_CLASS (mode) != MODE_INT) | |
344 | abort (); | |
345 | c[0] = 0; | |
346 | c[1] = 0; | |
347 | ch = 1; | |
348 | for (i = 0; i < GET_MODE_SIZE (mode); i++) | |
349 | { | |
350 | j = i; | |
351 | if (WORDS_BIG_ENDIAN) | |
352 | j = GET_MODE_SIZE (mode) - i - 1; | |
353 | if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN | |
354 | && GET_MODE_SIZE (mode) > UNITS_PER_WORD) | |
355 | j = j + UNITS_PER_WORD - 2 * (j % UNITS_PER_WORD) - 1; | |
356 | j *= BITS_PER_UNIT; | |
357 | if (j > 2 * HOST_BITS_PER_WIDE_INT) | |
358 | abort (); | |
359 | if (ch) | |
360 | ch = (unsigned char) str[i]; | |
361 | c[j / HOST_BITS_PER_WIDE_INT] |= ch << (j % HOST_BITS_PER_WIDE_INT); | |
362 | } | |
363 | return immed_double_const (c[0], c[1], mode); | |
364 | } | |
365 | ||
ecc318ff | 366 | /* Cast a target constant CST to target CHAR and if that value fits into |
367 | host char type, return zero and put that value into variable pointed by | |
368 | P. */ | |
369 | ||
370 | static int | |
371 | target_char_cast (cst, p) | |
372 | tree cst; | |
373 | char *p; | |
374 | { | |
375 | unsigned HOST_WIDE_INT val, hostval; | |
376 | ||
27d0c333 | 377 | if (!host_integerp (cst, 1) |
ecc318ff | 378 | || CHAR_TYPE_SIZE > HOST_BITS_PER_WIDE_INT) |
379 | return 1; | |
380 | ||
27d0c333 | 381 | val = tree_low_cst (cst, 1); |
ecc318ff | 382 | if (CHAR_TYPE_SIZE < HOST_BITS_PER_WIDE_INT) |
383 | val &= (((unsigned HOST_WIDE_INT) 1) << CHAR_TYPE_SIZE) - 1; | |
384 | ||
385 | hostval = val; | |
386 | if (HOST_BITS_PER_CHAR < HOST_BITS_PER_WIDE_INT) | |
387 | hostval &= (((unsigned HOST_WIDE_INT) 1) << HOST_BITS_PER_CHAR) - 1; | |
388 | ||
389 | if (val != hostval) | |
390 | return 1; | |
391 | ||
392 | *p = hostval; | |
393 | return 0; | |
394 | } | |
395 | ||
53800dbe | 396 | /* Given TEM, a pointer to a stack frame, follow the dynamic chain COUNT |
397 | times to get the address of either a higher stack frame, or a return | |
398 | address located within it (depending on FNDECL_CODE). */ | |
902de8ed | 399 | |
53800dbe | 400 | rtx |
401 | expand_builtin_return_addr (fndecl_code, count, tem) | |
402 | enum built_in_function fndecl_code; | |
403 | int count; | |
404 | rtx tem; | |
405 | { | |
406 | int i; | |
407 | ||
408 | /* Some machines need special handling before we can access | |
409 | arbitrary frames. For example, on the sparc, we must first flush | |
410 | all register windows to the stack. */ | |
411 | #ifdef SETUP_FRAME_ADDRESSES | |
412 | if (count > 0) | |
413 | SETUP_FRAME_ADDRESSES (); | |
414 | #endif | |
415 | ||
416 | /* On the sparc, the return address is not in the frame, it is in a | |
417 | register. There is no way to access it off of the current frame | |
418 | pointer, but it can be accessed off the previous frame pointer by | |
419 | reading the value from the register window save area. */ | |
420 | #ifdef RETURN_ADDR_IN_PREVIOUS_FRAME | |
421 | if (fndecl_code == BUILT_IN_RETURN_ADDRESS) | |
422 | count--; | |
423 | #endif | |
424 | ||
425 | /* Scan back COUNT frames to the specified frame. */ | |
426 | for (i = 0; i < count; i++) | |
427 | { | |
428 | /* Assume the dynamic chain pointer is in the word that the | |
429 | frame address points to, unless otherwise specified. */ | |
430 | #ifdef DYNAMIC_CHAIN_ADDRESS | |
431 | tem = DYNAMIC_CHAIN_ADDRESS (tem); | |
432 | #endif | |
433 | tem = memory_address (Pmode, tem); | |
83fc1478 | 434 | tem = gen_rtx_MEM (Pmode, tem); |
ab6ab77e | 435 | set_mem_alias_set (tem, get_frame_alias_set ()); |
83fc1478 | 436 | tem = copy_to_reg (tem); |
53800dbe | 437 | } |
438 | ||
439 | /* For __builtin_frame_address, return what we've got. */ | |
440 | if (fndecl_code == BUILT_IN_FRAME_ADDRESS) | |
441 | return tem; | |
442 | ||
443 | /* For __builtin_return_address, Get the return address from that | |
444 | frame. */ | |
445 | #ifdef RETURN_ADDR_RTX | |
446 | tem = RETURN_ADDR_RTX (count, tem); | |
447 | #else | |
448 | tem = memory_address (Pmode, | |
449 | plus_constant (tem, GET_MODE_SIZE (Pmode))); | |
450 | tem = gen_rtx_MEM (Pmode, tem); | |
ab6ab77e | 451 | set_mem_alias_set (tem, get_frame_alias_set ()); |
53800dbe | 452 | #endif |
453 | return tem; | |
454 | } | |
455 | ||
f7c44134 | 456 | /* Alias set used for setjmp buffer. */ |
457 | static HOST_WIDE_INT setjmp_alias_set = -1; | |
458 | ||
6b7f6858 | 459 | /* Construct the leading half of a __builtin_setjmp call. Control will |
460 | return to RECEIVER_LABEL. This is used directly by sjlj exception | |
461 | handling code. */ | |
53800dbe | 462 | |
6b7f6858 | 463 | void |
464 | expand_builtin_setjmp_setup (buf_addr, receiver_label) | |
53800dbe | 465 | rtx buf_addr; |
6b7f6858 | 466 | rtx receiver_label; |
53800dbe | 467 | { |
53800dbe | 468 | enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); |
53800dbe | 469 | rtx stack_save; |
f7c44134 | 470 | rtx mem; |
53800dbe | 471 | |
f7c44134 | 472 | if (setjmp_alias_set == -1) |
473 | setjmp_alias_set = new_alias_set (); | |
474 | ||
53800dbe | 475 | #ifdef POINTERS_EXTEND_UNSIGNED |
479e4d5e | 476 | if (GET_MODE (buf_addr) != Pmode) |
477 | buf_addr = convert_memory_address (Pmode, buf_addr); | |
53800dbe | 478 | #endif |
479 | ||
37ae8504 | 480 | buf_addr = force_reg (Pmode, force_operand (buf_addr, NULL_RTX)); |
53800dbe | 481 | |
53800dbe | 482 | emit_queue (); |
483 | ||
6b7f6858 | 484 | /* We store the frame pointer and the address of receiver_label in |
485 | the buffer and use the rest of it for the stack save area, which | |
486 | is machine-dependent. */ | |
53800dbe | 487 | |
488 | #ifndef BUILTIN_SETJMP_FRAME_VALUE | |
489 | #define BUILTIN_SETJMP_FRAME_VALUE virtual_stack_vars_rtx | |
490 | #endif | |
491 | ||
f7c44134 | 492 | mem = gen_rtx_MEM (Pmode, buf_addr); |
ab6ab77e | 493 | set_mem_alias_set (mem, setjmp_alias_set); |
f7c44134 | 494 | emit_move_insn (mem, BUILTIN_SETJMP_FRAME_VALUE); |
495 | ||
496 | mem = gen_rtx_MEM (Pmode, plus_constant (buf_addr, GET_MODE_SIZE (Pmode))), | |
ab6ab77e | 497 | set_mem_alias_set (mem, setjmp_alias_set); |
f7c44134 | 498 | |
499 | emit_move_insn (validize_mem (mem), | |
6b7f6858 | 500 | force_reg (Pmode, gen_rtx_LABEL_REF (Pmode, receiver_label))); |
53800dbe | 501 | |
502 | stack_save = gen_rtx_MEM (sa_mode, | |
503 | plus_constant (buf_addr, | |
504 | 2 * GET_MODE_SIZE (Pmode))); | |
ab6ab77e | 505 | set_mem_alias_set (stack_save, setjmp_alias_set); |
53800dbe | 506 | emit_stack_save (SAVE_NONLOCAL, &stack_save, NULL_RTX); |
507 | ||
508 | /* If there is further processing to do, do it. */ | |
509 | #ifdef HAVE_builtin_setjmp_setup | |
510 | if (HAVE_builtin_setjmp_setup) | |
511 | emit_insn (gen_builtin_setjmp_setup (buf_addr)); | |
512 | #endif | |
513 | ||
6b7f6858 | 514 | /* Tell optimize_save_area_alloca that extra work is going to |
515 | need to go on during alloca. */ | |
3b0fa6b6 | 516 | current_function_calls_setjmp = 1; |
80ab81b9 | 517 | |
518 | /* Set this so all the registers get saved in our frame; we need to be | |
2c0e001b | 519 | able to copy the saved values for any registers from frames we unwind. */ |
80ab81b9 | 520 | current_function_has_nonlocal_label = 1; |
6b7f6858 | 521 | } |
53800dbe | 522 | |
6b7f6858 | 523 | /* Construct the trailing part of a __builtin_setjmp call. |
524 | This is used directly by sjlj exception handling code. */ | |
525 | ||
526 | void | |
527 | expand_builtin_setjmp_receiver (receiver_label) | |
9342ee68 | 528 | rtx receiver_label ATTRIBUTE_UNUSED; |
6b7f6858 | 529 | { |
53800dbe | 530 | /* Clobber the FP when we get here, so we have to make sure it's |
531 | marked as used by this function. */ | |
532 | emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx)); | |
533 | ||
534 | /* Mark the static chain as clobbered here so life information | |
535 | doesn't get messed up for it. */ | |
536 | emit_insn (gen_rtx_CLOBBER (VOIDmode, static_chain_rtx)); | |
537 | ||
538 | /* Now put in the code to restore the frame pointer, and argument | |
539 | pointer, if needed. The code below is from expand_end_bindings | |
540 | in stmt.c; see detailed documentation there. */ | |
541 | #ifdef HAVE_nonlocal_goto | |
542 | if (! HAVE_nonlocal_goto) | |
543 | #endif | |
544 | emit_move_insn (virtual_stack_vars_rtx, hard_frame_pointer_rtx); | |
545 | ||
546 | #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM | |
547 | if (fixed_regs[ARG_POINTER_REGNUM]) | |
548 | { | |
549 | #ifdef ELIMINABLE_REGS | |
550 | size_t i; | |
e99c3a1d | 551 | static const struct elims {const int from, to;} elim_regs[] = ELIMINABLE_REGS; |
53800dbe | 552 | |
3098b2d3 | 553 | for (i = 0; i < ARRAY_SIZE (elim_regs); i++) |
53800dbe | 554 | if (elim_regs[i].from == ARG_POINTER_REGNUM |
555 | && elim_regs[i].to == HARD_FRAME_POINTER_REGNUM) | |
556 | break; | |
557 | ||
3098b2d3 | 558 | if (i == ARRAY_SIZE (elim_regs)) |
53800dbe | 559 | #endif |
560 | { | |
561 | /* Now restore our arg pointer from the address at which it | |
05927e40 | 562 | was saved in our stack frame. */ |
53800dbe | 563 | emit_move_insn (virtual_incoming_args_rtx, |
05927e40 | 564 | copy_to_reg (get_arg_pointer_save_area (cfun))); |
53800dbe | 565 | } |
566 | } | |
567 | #endif | |
568 | ||
569 | #ifdef HAVE_builtin_setjmp_receiver | |
570 | if (HAVE_builtin_setjmp_receiver) | |
6b7f6858 | 571 | emit_insn (gen_builtin_setjmp_receiver (receiver_label)); |
53800dbe | 572 | else |
573 | #endif | |
574 | #ifdef HAVE_nonlocal_goto_receiver | |
575 | if (HAVE_nonlocal_goto_receiver) | |
576 | emit_insn (gen_nonlocal_goto_receiver ()); | |
577 | else | |
578 | #endif | |
6b7f6858 | 579 | { /* Nothing */ } |
57f6bb94 | 580 | |
581 | /* @@@ This is a kludge. Not all machine descriptions define a blockage | |
582 | insn, but we must not allow the code we just generated to be reordered | |
583 | by scheduling. Specifically, the update of the frame pointer must | |
584 | happen immediately, not later. So emit an ASM_INPUT to act as blockage | |
585 | insn. */ | |
586 | emit_insn (gen_rtx_ASM_INPUT (VOIDmode, "")); | |
6b7f6858 | 587 | } |
53800dbe | 588 | |
6b7f6858 | 589 | /* __builtin_setjmp is passed a pointer to an array of five words (not |
590 | all will be used on all machines). It operates similarly to the C | |
591 | library function of the same name, but is more efficient. Much of | |
592 | the code below (and for longjmp) is copied from the handling of | |
593 | non-local gotos. | |
594 | ||
595 | NOTE: This is intended for use by GNAT and the exception handling | |
596 | scheme in the compiler and will only work in the method used by | |
597 | them. */ | |
598 | ||
599 | static rtx | |
600 | expand_builtin_setjmp (arglist, target) | |
601 | tree arglist; | |
602 | rtx target; | |
603 | { | |
604 | rtx buf_addr, next_lab, cont_lab; | |
605 | ||
0eb671f7 | 606 | if (!validate_arglist (arglist, POINTER_TYPE, VOID_TYPE)) |
6b7f6858 | 607 | return NULL_RTX; |
608 | ||
609 | if (target == 0 || GET_CODE (target) != REG | |
610 | || REGNO (target) < FIRST_PSEUDO_REGISTER) | |
611 | target = gen_reg_rtx (TYPE_MODE (integer_type_node)); | |
612 | ||
613 | buf_addr = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0); | |
614 | ||
615 | next_lab = gen_label_rtx (); | |
616 | cont_lab = gen_label_rtx (); | |
617 | ||
618 | expand_builtin_setjmp_setup (buf_addr, next_lab); | |
619 | ||
620 | /* Set TARGET to zero and branch to the continue label. */ | |
621 | emit_move_insn (target, const0_rtx); | |
622 | emit_jump_insn (gen_jump (cont_lab)); | |
53800dbe | 623 | emit_barrier (); |
6b7f6858 | 624 | emit_label (next_lab); |
625 | ||
626 | expand_builtin_setjmp_receiver (next_lab); | |
627 | ||
628 | /* Set TARGET to one. */ | |
629 | emit_move_insn (target, const1_rtx); | |
630 | emit_label (cont_lab); | |
631 | ||
632 | /* Tell flow about the strange goings on. Putting `next_lab' on | |
633 | `nonlocal_goto_handler_labels' to indicates that function | |
634 | calls may traverse the arc back to this label. */ | |
635 | ||
636 | current_function_has_nonlocal_label = 1; | |
637 | nonlocal_goto_handler_labels | |
638 | = gen_rtx_EXPR_LIST (VOIDmode, next_lab, nonlocal_goto_handler_labels); | |
53800dbe | 639 | |
640 | return target; | |
641 | } | |
642 | ||
643 | /* __builtin_longjmp is passed a pointer to an array of five words (not | |
644 | all will be used on all machines). It operates similarly to the C | |
645 | library function of the same name, but is more efficient. Much of | |
646 | the code below is copied from the handling of non-local gotos. | |
647 | ||
648 | NOTE: This is intended for use by GNAT and the exception handling | |
649 | scheme in the compiler and will only work in the method used by | |
650 | them. */ | |
651 | ||
652 | void | |
653 | expand_builtin_longjmp (buf_addr, value) | |
654 | rtx buf_addr, value; | |
655 | { | |
4712c7d6 | 656 | rtx fp, lab, stack, insn, last; |
53800dbe | 657 | enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); |
658 | ||
f7c44134 | 659 | if (setjmp_alias_set == -1) |
660 | setjmp_alias_set = new_alias_set (); | |
661 | ||
53800dbe | 662 | #ifdef POINTERS_EXTEND_UNSIGNED |
479e4d5e | 663 | if (GET_MODE (buf_addr) != Pmode) |
664 | buf_addr = convert_memory_address (Pmode, buf_addr); | |
53800dbe | 665 | #endif |
479e4d5e | 666 | |
53800dbe | 667 | buf_addr = force_reg (Pmode, buf_addr); |
668 | ||
669 | /* We used to store value in static_chain_rtx, but that fails if pointers | |
670 | are smaller than integers. We instead require that the user must pass | |
671 | a second argument of 1, because that is what builtin_setjmp will | |
672 | return. This also makes EH slightly more efficient, since we are no | |
673 | longer copying around a value that we don't care about. */ | |
674 | if (value != const1_rtx) | |
675 | abort (); | |
676 | ||
3b0fa6b6 | 677 | current_function_calls_longjmp = 1; |
678 | ||
4712c7d6 | 679 | last = get_last_insn (); |
53800dbe | 680 | #ifdef HAVE_builtin_longjmp |
681 | if (HAVE_builtin_longjmp) | |
682 | emit_insn (gen_builtin_longjmp (buf_addr)); | |
683 | else | |
684 | #endif | |
685 | { | |
686 | fp = gen_rtx_MEM (Pmode, buf_addr); | |
687 | lab = gen_rtx_MEM (Pmode, plus_constant (buf_addr, | |
688 | GET_MODE_SIZE (Pmode))); | |
689 | ||
690 | stack = gen_rtx_MEM (sa_mode, plus_constant (buf_addr, | |
691 | 2 * GET_MODE_SIZE (Pmode))); | |
ab6ab77e | 692 | set_mem_alias_set (fp, setjmp_alias_set); |
693 | set_mem_alias_set (lab, setjmp_alias_set); | |
694 | set_mem_alias_set (stack, setjmp_alias_set); | |
53800dbe | 695 | |
696 | /* Pick up FP, label, and SP from the block and jump. This code is | |
697 | from expand_goto in stmt.c; see there for detailed comments. */ | |
698 | #if HAVE_nonlocal_goto | |
699 | if (HAVE_nonlocal_goto) | |
700 | /* We have to pass a value to the nonlocal_goto pattern that will | |
701 | get copied into the static_chain pointer, but it does not matter | |
702 | what that value is, because builtin_setjmp does not use it. */ | |
28d202a8 | 703 | emit_insn (gen_nonlocal_goto (value, lab, stack, fp)); |
53800dbe | 704 | else |
705 | #endif | |
706 | { | |
707 | lab = copy_to_reg (lab); | |
708 | ||
709 | emit_move_insn (hard_frame_pointer_rtx, fp); | |
710 | emit_stack_restore (SAVE_NONLOCAL, stack, NULL_RTX); | |
711 | ||
712 | emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx)); | |
713 | emit_insn (gen_rtx_USE (VOIDmode, stack_pointer_rtx)); | |
714 | emit_indirect_jump (lab); | |
715 | } | |
716 | } | |
615166bb | 717 | |
718 | /* Search backwards and mark the jump insn as a non-local goto. | |
719 | Note that this precludes the use of __builtin_longjmp to a | |
720 | __builtin_setjmp target in the same function. However, we've | |
721 | already cautioned the user that these functions are for | |
722 | internal exception handling use only. */ | |
449c0509 | 723 | for (insn = get_last_insn (); insn; insn = PREV_INSN (insn)) |
724 | { | |
4712c7d6 | 725 | if (insn == last) |
726 | abort (); | |
449c0509 | 727 | if (GET_CODE (insn) == JUMP_INSN) |
728 | { | |
729 | REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO, const0_rtx, | |
730 | REG_NOTES (insn)); | |
731 | break; | |
732 | } | |
733 | else if (GET_CODE (insn) == CALL_INSN) | |
9342ee68 | 734 | break; |
449c0509 | 735 | } |
53800dbe | 736 | } |
737 | ||
5e3608d8 | 738 | /* Expand a call to __builtin_prefetch. For a target that does not support |
739 | data prefetch, evaluate the memory address argument in case it has side | |
740 | effects. */ | |
741 | ||
742 | static void | |
743 | expand_builtin_prefetch (arglist) | |
744 | tree arglist; | |
745 | { | |
746 | tree arg0, arg1, arg2; | |
747 | rtx op0, op1, op2; | |
748 | ||
26a5cadb | 749 | if (!validate_arglist (arglist, POINTER_TYPE, 0)) |
750 | return; | |
751 | ||
5e3608d8 | 752 | arg0 = TREE_VALUE (arglist); |
26a5cadb | 753 | /* Arguments 1 and 2 are optional; argument 1 (read/write) defaults to |
754 | zero (read) and argument 2 (locality) defaults to 3 (high degree of | |
755 | locality). */ | |
756 | if (TREE_CHAIN (arglist)) | |
757 | { | |
758 | arg1 = TREE_VALUE (TREE_CHAIN (arglist)); | |
759 | if (TREE_CHAIN (TREE_CHAIN (arglist))) | |
9342ee68 | 760 | arg2 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); |
26a5cadb | 761 | else |
762 | arg2 = build_int_2 (3, 0); | |
763 | } | |
764 | else | |
765 | { | |
766 | arg1 = integer_zero_node; | |
767 | arg2 = build_int_2 (3, 0); | |
768 | } | |
5e3608d8 | 769 | |
770 | /* Argument 0 is an address. */ | |
771 | op0 = expand_expr (arg0, NULL_RTX, Pmode, EXPAND_NORMAL); | |
772 | ||
773 | /* Argument 1 (read/write flag) must be a compile-time constant int. */ | |
774 | if (TREE_CODE (arg1) != INTEGER_CST) | |
775 | { | |
9342ee68 | 776 | error ("second arg to `__builtin_prefetch' must be a constant"); |
777 | arg1 = integer_zero_node; | |
5e3608d8 | 778 | } |
bf8e3599 | 779 | op1 = expand_expr (arg1, NULL_RTX, VOIDmode, 0); |
5e3608d8 | 780 | /* Argument 1 must be either zero or one. */ |
781 | if (INTVAL (op1) != 0 && INTVAL (op1) != 1) | |
782 | { | |
783 | warning ("invalid second arg to __builtin_prefetch; using zero"); | |
784 | op1 = const0_rtx; | |
785 | } | |
786 | ||
787 | /* Argument 2 (locality) must be a compile-time constant int. */ | |
788 | if (TREE_CODE (arg2) != INTEGER_CST) | |
789 | { | |
790 | error ("third arg to `__builtin_prefetch' must be a constant"); | |
791 | arg2 = integer_zero_node; | |
792 | } | |
bf8e3599 | 793 | op2 = expand_expr (arg2, NULL_RTX, VOIDmode, 0); |
5e3608d8 | 794 | /* Argument 2 must be 0, 1, 2, or 3. */ |
795 | if (INTVAL (op2) < 0 || INTVAL (op2) > 3) | |
796 | { | |
797 | warning ("invalid third arg to __builtin_prefetch; using zero"); | |
798 | op2 = const0_rtx; | |
799 | } | |
800 | ||
801 | #ifdef HAVE_prefetch | |
802 | if (HAVE_prefetch) | |
803 | { | |
f0ce3b1f | 804 | if ((! (*insn_data[(int) CODE_FOR_prefetch].operand[0].predicate) |
4cd21437 | 805 | (op0, |
f0ce3b1f | 806 | insn_data[(int) CODE_FOR_prefetch].operand[0].mode)) |
807 | || (GET_MODE(op0) != Pmode)) | |
9342ee68 | 808 | { |
4cd21437 | 809 | #ifdef POINTERS_EXTEND_UNSIGNED |
810 | if (GET_MODE(op0) != Pmode) | |
811 | op0 = convert_memory_address (Pmode, op0); | |
812 | #endif | |
9342ee68 | 813 | op0 = force_reg (Pmode, op0); |
814 | } | |
5e3608d8 | 815 | emit_insn (gen_prefetch (op0, op1, op2)); |
816 | } | |
817 | else | |
818 | #endif | |
819 | op0 = protect_from_queue (op0, 0); | |
f0ce3b1f | 820 | /* Don't do anything with direct references to volatile memory, but |
821 | generate code to handle other side effects. */ | |
822 | if (GET_CODE (op0) != MEM && side_effects_p (op0)) | |
823 | emit_insn (op0); | |
5e3608d8 | 824 | } |
825 | ||
f7c44134 | 826 | /* Get a MEM rtx for expression EXP which is the address of an operand |
827 | to be used to be used in a string instruction (cmpstrsi, movstrsi, ..). */ | |
828 | ||
53800dbe | 829 | static rtx |
830 | get_memory_rtx (exp) | |
831 | tree exp; | |
832 | { | |
726ec87c | 833 | rtx addr = expand_expr (exp, NULL_RTX, ptr_mode, EXPAND_SUM); |
834 | rtx mem; | |
f7c44134 | 835 | |
726ec87c | 836 | #ifdef POINTERS_EXTEND_UNSIGNED |
837 | if (GET_MODE (addr) != Pmode) | |
838 | addr = convert_memory_address (Pmode, addr); | |
839 | #endif | |
840 | ||
841 | mem = gen_rtx_MEM (BLKmode, memory_address (BLKmode, addr)); | |
2a631e19 | 842 | |
f7c44134 | 843 | /* Get an expression we can use to find the attributes to assign to MEM. |
844 | If it is an ADDR_EXPR, use the operand. Otherwise, dereference it if | |
845 | we can. First remove any nops. */ | |
846 | while ((TREE_CODE (exp) == NOP_EXPR || TREE_CODE (exp) == CONVERT_EXPR | |
f0ce3b1f | 847 | || TREE_CODE (exp) == NON_LVALUE_EXPR) |
f7c44134 | 848 | && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
849 | exp = TREE_OPERAND (exp, 0); | |
850 | ||
851 | if (TREE_CODE (exp) == ADDR_EXPR) | |
eec8e941 | 852 | { |
853 | exp = TREE_OPERAND (exp, 0); | |
854 | set_mem_attributes (mem, exp, 0); | |
855 | } | |
f7c44134 | 856 | else if (POINTER_TYPE_P (TREE_TYPE (exp))) |
eec8e941 | 857 | { |
858 | exp = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (exp)), exp); | |
859 | /* memcpy, memset and other builtin stringops can alias with anything. */ | |
860 | set_mem_alias_set (mem, 0); | |
861 | } | |
53800dbe | 862 | |
53800dbe | 863 | return mem; |
864 | } | |
865 | \f | |
866 | /* Built-in functions to perform an untyped call and return. */ | |
867 | ||
868 | /* For each register that may be used for calling a function, this | |
869 | gives a mode used to copy the register's value. VOIDmode indicates | |
870 | the register is not used for calling a function. If the machine | |
871 | has register windows, this gives only the outbound registers. | |
872 | INCOMING_REGNO gives the corresponding inbound register. */ | |
873 | static enum machine_mode apply_args_mode[FIRST_PSEUDO_REGISTER]; | |
874 | ||
875 | /* For each register that may be used for returning values, this gives | |
876 | a mode used to copy the register's value. VOIDmode indicates the | |
877 | register is not used for returning values. If the machine has | |
878 | register windows, this gives only the outbound registers. | |
879 | INCOMING_REGNO gives the corresponding inbound register. */ | |
880 | static enum machine_mode apply_result_mode[FIRST_PSEUDO_REGISTER]; | |
881 | ||
882 | /* For each register that may be used for calling a function, this | |
883 | gives the offset of that register into the block returned by | |
884 | __builtin_apply_args. 0 indicates that the register is not | |
885 | used for calling a function. */ | |
886 | static int apply_args_reg_offset[FIRST_PSEUDO_REGISTER]; | |
887 | ||
bf8e3599 | 888 | /* Return the offset of register REGNO into the block returned by |
53800dbe | 889 | __builtin_apply_args. This is not declared static, since it is |
890 | needed in objc-act.c. */ | |
891 | ||
bf8e3599 | 892 | int |
53800dbe | 893 | apply_args_register_offset (regno) |
894 | int regno; | |
895 | { | |
896 | apply_args_size (); | |
897 | ||
898 | /* Arguments are always put in outgoing registers (in the argument | |
899 | block) if such make sense. */ | |
900 | #ifdef OUTGOING_REGNO | |
f0ce3b1f | 901 | regno = OUTGOING_REGNO (regno); |
53800dbe | 902 | #endif |
903 | return apply_args_reg_offset[regno]; | |
904 | } | |
905 | ||
906 | /* Return the size required for the block returned by __builtin_apply_args, | |
907 | and initialize apply_args_mode. */ | |
908 | ||
909 | static int | |
910 | apply_args_size () | |
911 | { | |
912 | static int size = -1; | |
58e9ce8f | 913 | int align; |
914 | unsigned int regno; | |
53800dbe | 915 | enum machine_mode mode; |
916 | ||
917 | /* The values computed by this function never change. */ | |
918 | if (size < 0) | |
919 | { | |
920 | /* The first value is the incoming arg-pointer. */ | |
921 | size = GET_MODE_SIZE (Pmode); | |
922 | ||
923 | /* The second value is the structure value address unless this is | |
924 | passed as an "invisible" first argument. */ | |
925 | if (struct_value_rtx) | |
926 | size += GET_MODE_SIZE (Pmode); | |
927 | ||
928 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
929 | if (FUNCTION_ARG_REGNO_P (regno)) | |
930 | { | |
931 | /* Search for the proper mode for copying this register's | |
932 | value. I'm not sure this is right, but it works so far. */ | |
933 | enum machine_mode best_mode = VOIDmode; | |
934 | ||
935 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); | |
936 | mode != VOIDmode; | |
937 | mode = GET_MODE_WIDER_MODE (mode)) | |
938 | if (HARD_REGNO_MODE_OK (regno, mode) | |
939 | && HARD_REGNO_NREGS (regno, mode) == 1) | |
940 | best_mode = mode; | |
941 | ||
942 | if (best_mode == VOIDmode) | |
943 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); | |
944 | mode != VOIDmode; | |
945 | mode = GET_MODE_WIDER_MODE (mode)) | |
946 | if (HARD_REGNO_MODE_OK (regno, mode) | |
ad99e708 | 947 | && have_insn_for (SET, mode)) |
53800dbe | 948 | best_mode = mode; |
949 | ||
223097eb | 950 | if (best_mode == VOIDmode) |
951 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_FLOAT); | |
952 | mode != VOIDmode; | |
953 | mode = GET_MODE_WIDER_MODE (mode)) | |
954 | if (HARD_REGNO_MODE_OK (regno, mode) | |
955 | && have_insn_for (SET, mode)) | |
956 | best_mode = mode; | |
957 | ||
958 | if (best_mode == VOIDmode) | |
959 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_INT); | |
960 | mode != VOIDmode; | |
961 | mode = GET_MODE_WIDER_MODE (mode)) | |
962 | if (HARD_REGNO_MODE_OK (regno, mode) | |
963 | && have_insn_for (SET, mode)) | |
964 | best_mode = mode; | |
965 | ||
53800dbe | 966 | mode = best_mode; |
967 | if (mode == VOIDmode) | |
968 | abort (); | |
969 | ||
970 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
971 | if (size % align != 0) | |
972 | size = CEIL (size, align) * align; | |
973 | apply_args_reg_offset[regno] = size; | |
974 | size += GET_MODE_SIZE (mode); | |
975 | apply_args_mode[regno] = mode; | |
976 | } | |
977 | else | |
978 | { | |
979 | apply_args_mode[regno] = VOIDmode; | |
980 | apply_args_reg_offset[regno] = 0; | |
981 | } | |
982 | } | |
983 | return size; | |
984 | } | |
985 | ||
986 | /* Return the size required for the block returned by __builtin_apply, | |
987 | and initialize apply_result_mode. */ | |
988 | ||
989 | static int | |
990 | apply_result_size () | |
991 | { | |
992 | static int size = -1; | |
993 | int align, regno; | |
994 | enum machine_mode mode; | |
995 | ||
996 | /* The values computed by this function never change. */ | |
997 | if (size < 0) | |
998 | { | |
999 | size = 0; | |
1000 | ||
1001 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1002 | if (FUNCTION_VALUE_REGNO_P (regno)) | |
1003 | { | |
1004 | /* Search for the proper mode for copying this register's | |
1005 | value. I'm not sure this is right, but it works so far. */ | |
1006 | enum machine_mode best_mode = VOIDmode; | |
1007 | ||
1008 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); | |
1009 | mode != TImode; | |
1010 | mode = GET_MODE_WIDER_MODE (mode)) | |
1011 | if (HARD_REGNO_MODE_OK (regno, mode)) | |
1012 | best_mode = mode; | |
1013 | ||
1014 | if (best_mode == VOIDmode) | |
1015 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); | |
1016 | mode != VOIDmode; | |
1017 | mode = GET_MODE_WIDER_MODE (mode)) | |
1018 | if (HARD_REGNO_MODE_OK (regno, mode) | |
ad99e708 | 1019 | && have_insn_for (SET, mode)) |
53800dbe | 1020 | best_mode = mode; |
1021 | ||
223097eb | 1022 | if (best_mode == VOIDmode) |
1023 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_FLOAT); | |
1024 | mode != VOIDmode; | |
1025 | mode = GET_MODE_WIDER_MODE (mode)) | |
1026 | if (HARD_REGNO_MODE_OK (regno, mode) | |
1027 | && have_insn_for (SET, mode)) | |
f0ce3b1f | 1028 | best_mode = mode; |
223097eb | 1029 | |
1030 | if (best_mode == VOIDmode) | |
1031 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_INT); | |
1032 | mode != VOIDmode; | |
1033 | mode = GET_MODE_WIDER_MODE (mode)) | |
1034 | if (HARD_REGNO_MODE_OK (regno, mode) | |
1035 | && have_insn_for (SET, mode)) | |
1036 | best_mode = mode; | |
1037 | ||
53800dbe | 1038 | mode = best_mode; |
1039 | if (mode == VOIDmode) | |
1040 | abort (); | |
1041 | ||
1042 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1043 | if (size % align != 0) | |
1044 | size = CEIL (size, align) * align; | |
1045 | size += GET_MODE_SIZE (mode); | |
1046 | apply_result_mode[regno] = mode; | |
1047 | } | |
1048 | else | |
1049 | apply_result_mode[regno] = VOIDmode; | |
1050 | ||
1051 | /* Allow targets that use untyped_call and untyped_return to override | |
1052 | the size so that machine-specific information can be stored here. */ | |
1053 | #ifdef APPLY_RESULT_SIZE | |
1054 | size = APPLY_RESULT_SIZE; | |
1055 | #endif | |
1056 | } | |
1057 | return size; | |
1058 | } | |
1059 | ||
1060 | #if defined (HAVE_untyped_call) || defined (HAVE_untyped_return) | |
1061 | /* Create a vector describing the result block RESULT. If SAVEP is true, | |
1062 | the result block is used to save the values; otherwise it is used to | |
1063 | restore the values. */ | |
1064 | ||
1065 | static rtx | |
1066 | result_vector (savep, result) | |
1067 | int savep; | |
1068 | rtx result; | |
1069 | { | |
1070 | int regno, size, align, nelts; | |
1071 | enum machine_mode mode; | |
1072 | rtx reg, mem; | |
1073 | rtx *savevec = (rtx *) alloca (FIRST_PSEUDO_REGISTER * sizeof (rtx)); | |
bf8e3599 | 1074 | |
53800dbe | 1075 | size = nelts = 0; |
1076 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1077 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
1078 | { | |
1079 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1080 | if (size % align != 0) | |
1081 | size = CEIL (size, align) * align; | |
1082 | reg = gen_rtx_REG (mode, savep ? regno : INCOMING_REGNO (regno)); | |
e513d163 | 1083 | mem = adjust_address (result, mode, size); |
53800dbe | 1084 | savevec[nelts++] = (savep |
1085 | ? gen_rtx_SET (VOIDmode, mem, reg) | |
1086 | : gen_rtx_SET (VOIDmode, reg, mem)); | |
1087 | size += GET_MODE_SIZE (mode); | |
1088 | } | |
1089 | return gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (nelts, savevec)); | |
1090 | } | |
1091 | #endif /* HAVE_untyped_call or HAVE_untyped_return */ | |
1092 | ||
1093 | /* Save the state required to perform an untyped call with the same | |
1094 | arguments as were passed to the current function. */ | |
1095 | ||
1096 | static rtx | |
1097 | expand_builtin_apply_args_1 () | |
1098 | { | |
1099 | rtx registers; | |
1100 | int size, align, regno; | |
1101 | enum machine_mode mode; | |
1102 | ||
1103 | /* Create a block where the arg-pointer, structure value address, | |
1104 | and argument registers can be saved. */ | |
1105 | registers = assign_stack_local (BLKmode, apply_args_size (), -1); | |
1106 | ||
1107 | /* Walk past the arg-pointer and structure value address. */ | |
1108 | size = GET_MODE_SIZE (Pmode); | |
1109 | if (struct_value_rtx) | |
1110 | size += GET_MODE_SIZE (Pmode); | |
1111 | ||
1112 | /* Save each register used in calling a function to the block. */ | |
1113 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1114 | if ((mode = apply_args_mode[regno]) != VOIDmode) | |
1115 | { | |
1116 | rtx tem; | |
1117 | ||
1118 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1119 | if (size % align != 0) | |
1120 | size = CEIL (size, align) * align; | |
1121 | ||
1122 | tem = gen_rtx_REG (mode, INCOMING_REGNO (regno)); | |
1123 | ||
e513d163 | 1124 | emit_move_insn (adjust_address (registers, mode, size), tem); |
53800dbe | 1125 | size += GET_MODE_SIZE (mode); |
1126 | } | |
1127 | ||
1128 | /* Save the arg pointer to the block. */ | |
e513d163 | 1129 | emit_move_insn (adjust_address (registers, Pmode, 0), |
53800dbe | 1130 | copy_to_reg (virtual_incoming_args_rtx)); |
1131 | size = GET_MODE_SIZE (Pmode); | |
1132 | ||
1133 | /* Save the structure value address unless this is passed as an | |
1134 | "invisible" first argument. */ | |
1135 | if (struct_value_incoming_rtx) | |
1136 | { | |
e513d163 | 1137 | emit_move_insn (adjust_address (registers, Pmode, size), |
53800dbe | 1138 | copy_to_reg (struct_value_incoming_rtx)); |
1139 | size += GET_MODE_SIZE (Pmode); | |
1140 | } | |
1141 | ||
1142 | /* Return the address of the block. */ | |
1143 | return copy_addr_to_reg (XEXP (registers, 0)); | |
1144 | } | |
1145 | ||
1146 | /* __builtin_apply_args returns block of memory allocated on | |
1147 | the stack into which is stored the arg pointer, structure | |
1148 | value address, static chain, and all the registers that might | |
1149 | possibly be used in performing a function call. The code is | |
1150 | moved to the start of the function so the incoming values are | |
1151 | saved. */ | |
27d0c333 | 1152 | |
53800dbe | 1153 | static rtx |
1154 | expand_builtin_apply_args () | |
1155 | { | |
1156 | /* Don't do __builtin_apply_args more than once in a function. | |
1157 | Save the result of the first call and reuse it. */ | |
1158 | if (apply_args_value != 0) | |
1159 | return apply_args_value; | |
1160 | { | |
1161 | /* When this function is called, it means that registers must be | |
1162 | saved on entry to this function. So we migrate the | |
1163 | call to the first insn of this function. */ | |
1164 | rtx temp; | |
1165 | rtx seq; | |
1166 | ||
1167 | start_sequence (); | |
1168 | temp = expand_builtin_apply_args_1 (); | |
1169 | seq = get_insns (); | |
1170 | end_sequence (); | |
1171 | ||
1172 | apply_args_value = temp; | |
1173 | ||
31d3e01c | 1174 | /* Put the insns after the NOTE that starts the function. |
1175 | If this is inside a start_sequence, make the outer-level insn | |
53800dbe | 1176 | chain current, so the code is placed at the start of the |
1177 | function. */ | |
1178 | push_topmost_sequence (); | |
31d3e01c | 1179 | emit_insn_before (seq, NEXT_INSN (get_insns ())); |
53800dbe | 1180 | pop_topmost_sequence (); |
1181 | return temp; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | /* Perform an untyped call and save the state required to perform an | |
1186 | untyped return of whatever value was returned by the given function. */ | |
1187 | ||
1188 | static rtx | |
1189 | expand_builtin_apply (function, arguments, argsize) | |
1190 | rtx function, arguments, argsize; | |
1191 | { | |
1192 | int size, align, regno; | |
1193 | enum machine_mode mode; | |
2a631e19 | 1194 | rtx incoming_args, result, reg, dest, src, call_insn; |
53800dbe | 1195 | rtx old_stack_level = 0; |
1196 | rtx call_fusage = 0; | |
1197 | ||
726ec87c | 1198 | #ifdef POINTERS_EXTEND_UNSIGNED |
1199 | if (GET_MODE (arguments) != Pmode) | |
1200 | arguments = convert_memory_address (Pmode, arguments); | |
1201 | #endif | |
1202 | ||
53800dbe | 1203 | /* Create a block where the return registers can be saved. */ |
1204 | result = assign_stack_local (BLKmode, apply_result_size (), -1); | |
1205 | ||
53800dbe | 1206 | /* Fetch the arg pointer from the ARGUMENTS block. */ |
1207 | incoming_args = gen_reg_rtx (Pmode); | |
726ec87c | 1208 | emit_move_insn (incoming_args, gen_rtx_MEM (Pmode, arguments)); |
53800dbe | 1209 | #ifndef STACK_GROWS_DOWNWARD |
ad99e708 | 1210 | incoming_args = expand_simple_binop (Pmode, MINUS, incoming_args, argsize, |
1211 | incoming_args, 0, OPTAB_LIB_WIDEN); | |
53800dbe | 1212 | #endif |
1213 | ||
1214 | /* Perform postincrements before actually calling the function. */ | |
1215 | emit_queue (); | |
1216 | ||
04a46d40 | 1217 | /* Push a new argument block and copy the arguments. Do not allow |
1218 | the (potential) memcpy call below to interfere with our stack | |
1219 | manipulations. */ | |
53800dbe | 1220 | do_pending_stack_adjust (); |
04a46d40 | 1221 | NO_DEFER_POP; |
53800dbe | 1222 | |
1223 | /* Save the stack with nonlocal if available */ | |
1224 | #ifdef HAVE_save_stack_nonlocal | |
1225 | if (HAVE_save_stack_nonlocal) | |
1226 | emit_stack_save (SAVE_NONLOCAL, &old_stack_level, NULL_RTX); | |
1227 | else | |
1228 | #endif | |
1229 | emit_stack_save (SAVE_BLOCK, &old_stack_level, NULL_RTX); | |
1230 | ||
1231 | /* Push a block of memory onto the stack to store the memory arguments. | |
1232 | Save the address in a register, and copy the memory arguments. ??? I | |
1233 | haven't figured out how the calling convention macros effect this, | |
1234 | but it's likely that the source and/or destination addresses in | |
1235 | the block copy will need updating in machine specific ways. */ | |
91b70175 | 1236 | dest = allocate_dynamic_stack_space (argsize, 0, BITS_PER_UNIT); |
2a631e19 | 1237 | dest = gen_rtx_MEM (BLKmode, dest); |
1238 | set_mem_align (dest, PARM_BOUNDARY); | |
1239 | src = gen_rtx_MEM (BLKmode, incoming_args); | |
1240 | set_mem_align (src, PARM_BOUNDARY); | |
0378dbdc | 1241 | emit_block_move (dest, src, argsize, BLOCK_OP_NORMAL); |
53800dbe | 1242 | |
1243 | /* Refer to the argument block. */ | |
1244 | apply_args_size (); | |
1245 | arguments = gen_rtx_MEM (BLKmode, arguments); | |
2a631e19 | 1246 | set_mem_align (arguments, PARM_BOUNDARY); |
53800dbe | 1247 | |
1248 | /* Walk past the arg-pointer and structure value address. */ | |
1249 | size = GET_MODE_SIZE (Pmode); | |
1250 | if (struct_value_rtx) | |
1251 | size += GET_MODE_SIZE (Pmode); | |
1252 | ||
1253 | /* Restore each of the registers previously saved. Make USE insns | |
1254 | for each of these registers for use in making the call. */ | |
1255 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1256 | if ((mode = apply_args_mode[regno]) != VOIDmode) | |
1257 | { | |
1258 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1259 | if (size % align != 0) | |
1260 | size = CEIL (size, align) * align; | |
1261 | reg = gen_rtx_REG (mode, regno); | |
e513d163 | 1262 | emit_move_insn (reg, adjust_address (arguments, mode, size)); |
53800dbe | 1263 | use_reg (&call_fusage, reg); |
1264 | size += GET_MODE_SIZE (mode); | |
1265 | } | |
1266 | ||
1267 | /* Restore the structure value address unless this is passed as an | |
1268 | "invisible" first argument. */ | |
1269 | size = GET_MODE_SIZE (Pmode); | |
1270 | if (struct_value_rtx) | |
1271 | { | |
1272 | rtx value = gen_reg_rtx (Pmode); | |
e513d163 | 1273 | emit_move_insn (value, adjust_address (arguments, Pmode, size)); |
53800dbe | 1274 | emit_move_insn (struct_value_rtx, value); |
1275 | if (GET_CODE (struct_value_rtx) == REG) | |
f0ce3b1f | 1276 | use_reg (&call_fusage, struct_value_rtx); |
53800dbe | 1277 | size += GET_MODE_SIZE (Pmode); |
1278 | } | |
1279 | ||
1280 | /* All arguments and registers used for the call are set up by now! */ | |
707ff8b1 | 1281 | function = prepare_call_address (function, NULL_TREE, &call_fusage, 0, 0); |
53800dbe | 1282 | |
1283 | /* Ensure address is valid. SYMBOL_REF is already valid, so no need, | |
1284 | and we don't want to load it into a register as an optimization, | |
1285 | because prepare_call_address already did it if it should be done. */ | |
1286 | if (GET_CODE (function) != SYMBOL_REF) | |
1287 | function = memory_address (FUNCTION_MODE, function); | |
1288 | ||
1289 | /* Generate the actual call instruction and save the return value. */ | |
1290 | #ifdef HAVE_untyped_call | |
1291 | if (HAVE_untyped_call) | |
1292 | emit_call_insn (gen_untyped_call (gen_rtx_MEM (FUNCTION_MODE, function), | |
1293 | result, result_vector (1, result))); | |
1294 | else | |
1295 | #endif | |
1296 | #ifdef HAVE_call_value | |
1297 | if (HAVE_call_value) | |
1298 | { | |
1299 | rtx valreg = 0; | |
1300 | ||
1301 | /* Locate the unique return register. It is not possible to | |
1302 | express a call that sets more than one return register using | |
1303 | call_value; use untyped_call for that. In fact, untyped_call | |
1304 | only needs to save the return registers in the given block. */ | |
1305 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1306 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
1307 | { | |
1308 | if (valreg) | |
1309 | abort (); /* HAVE_untyped_call required. */ | |
1310 | valreg = gen_rtx_REG (mode, regno); | |
1311 | } | |
1312 | ||
2ed6c343 | 1313 | emit_call_insn (GEN_CALL_VALUE (valreg, |
53800dbe | 1314 | gen_rtx_MEM (FUNCTION_MODE, function), |
1315 | const0_rtx, NULL_RTX, const0_rtx)); | |
1316 | ||
e513d163 | 1317 | emit_move_insn (adjust_address (result, GET_MODE (valreg), 0), valreg); |
53800dbe | 1318 | } |
1319 | else | |
1320 | #endif | |
1321 | abort (); | |
1322 | ||
1323 | /* Find the CALL insn we just emitted. */ | |
1324 | for (call_insn = get_last_insn (); | |
1325 | call_insn && GET_CODE (call_insn) != CALL_INSN; | |
1326 | call_insn = PREV_INSN (call_insn)) | |
1327 | ; | |
1328 | ||
1329 | if (! call_insn) | |
1330 | abort (); | |
1331 | ||
1332 | /* Put the register usage information on the CALL. If there is already | |
1333 | some usage information, put ours at the end. */ | |
1334 | if (CALL_INSN_FUNCTION_USAGE (call_insn)) | |
1335 | { | |
1336 | rtx link; | |
1337 | ||
1338 | for (link = CALL_INSN_FUNCTION_USAGE (call_insn); XEXP (link, 1) != 0; | |
1339 | link = XEXP (link, 1)) | |
1340 | ; | |
1341 | ||
1342 | XEXP (link, 1) = call_fusage; | |
1343 | } | |
1344 | else | |
1345 | CALL_INSN_FUNCTION_USAGE (call_insn) = call_fusage; | |
1346 | ||
1347 | /* Restore the stack. */ | |
1348 | #ifdef HAVE_save_stack_nonlocal | |
1349 | if (HAVE_save_stack_nonlocal) | |
1350 | emit_stack_restore (SAVE_NONLOCAL, old_stack_level, NULL_RTX); | |
1351 | else | |
1352 | #endif | |
1353 | emit_stack_restore (SAVE_BLOCK, old_stack_level, NULL_RTX); | |
1354 | ||
04a46d40 | 1355 | OK_DEFER_POP; |
1356 | ||
53800dbe | 1357 | /* Return the address of the result block. */ |
1358 | return copy_addr_to_reg (XEXP (result, 0)); | |
1359 | } | |
1360 | ||
1361 | /* Perform an untyped return. */ | |
1362 | ||
1363 | static void | |
1364 | expand_builtin_return (result) | |
1365 | rtx result; | |
1366 | { | |
1367 | int size, align, regno; | |
1368 | enum machine_mode mode; | |
1369 | rtx reg; | |
1370 | rtx call_fusage = 0; | |
1371 | ||
726ec87c | 1372 | #ifdef POINTERS_EXTEND_UNSIGNED |
1373 | if (GET_MODE (result) != Pmode) | |
1374 | result = convert_memory_address (Pmode, result); | |
1375 | #endif | |
1376 | ||
53800dbe | 1377 | apply_result_size (); |
1378 | result = gen_rtx_MEM (BLKmode, result); | |
1379 | ||
1380 | #ifdef HAVE_untyped_return | |
1381 | if (HAVE_untyped_return) | |
1382 | { | |
1383 | emit_jump_insn (gen_untyped_return (result, result_vector (0, result))); | |
1384 | emit_barrier (); | |
1385 | return; | |
1386 | } | |
1387 | #endif | |
1388 | ||
1389 | /* Restore the return value and note that each value is used. */ | |
1390 | size = 0; | |
1391 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1392 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
1393 | { | |
1394 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1395 | if (size % align != 0) | |
1396 | size = CEIL (size, align) * align; | |
1397 | reg = gen_rtx_REG (mode, INCOMING_REGNO (regno)); | |
e513d163 | 1398 | emit_move_insn (reg, adjust_address (result, mode, size)); |
53800dbe | 1399 | |
1400 | push_to_sequence (call_fusage); | |
1401 | emit_insn (gen_rtx_USE (VOIDmode, reg)); | |
1402 | call_fusage = get_insns (); | |
1403 | end_sequence (); | |
1404 | size += GET_MODE_SIZE (mode); | |
1405 | } | |
1406 | ||
1407 | /* Put the USE insns before the return. */ | |
31d3e01c | 1408 | emit_insn (call_fusage); |
53800dbe | 1409 | |
1410 | /* Return whatever values was restored by jumping directly to the end | |
1411 | of the function. */ | |
1412 | expand_null_return (); | |
1413 | } | |
1414 | ||
539a3a92 | 1415 | /* Used by expand_builtin_classify_type and fold_builtin_classify_type. */ |
27d0c333 | 1416 | |
539a3a92 | 1417 | static enum type_class |
1418 | type_to_class (type) | |
1419 | tree type; | |
1420 | { | |
1421 | switch (TREE_CODE (type)) | |
1422 | { | |
1423 | case VOID_TYPE: return void_type_class; | |
1424 | case INTEGER_TYPE: return integer_type_class; | |
1425 | case CHAR_TYPE: return char_type_class; | |
1426 | case ENUMERAL_TYPE: return enumeral_type_class; | |
1427 | case BOOLEAN_TYPE: return boolean_type_class; | |
1428 | case POINTER_TYPE: return pointer_type_class; | |
1429 | case REFERENCE_TYPE: return reference_type_class; | |
1430 | case OFFSET_TYPE: return offset_type_class; | |
1431 | case REAL_TYPE: return real_type_class; | |
1432 | case COMPLEX_TYPE: return complex_type_class; | |
1433 | case FUNCTION_TYPE: return function_type_class; | |
1434 | case METHOD_TYPE: return method_type_class; | |
1435 | case RECORD_TYPE: return record_type_class; | |
1436 | case UNION_TYPE: | |
1437 | case QUAL_UNION_TYPE: return union_type_class; | |
1438 | case ARRAY_TYPE: return (TYPE_STRING_FLAG (type) | |
1439 | ? string_type_class : array_type_class); | |
1440 | case SET_TYPE: return set_type_class; | |
1441 | case FILE_TYPE: return file_type_class; | |
1442 | case LANG_TYPE: return lang_type_class; | |
1443 | default: return no_type_class; | |
1444 | } | |
1445 | } | |
bf8e3599 | 1446 | |
53800dbe | 1447 | /* Expand a call to __builtin_classify_type with arguments found in |
1448 | ARGLIST. */ | |
27d0c333 | 1449 | |
53800dbe | 1450 | static rtx |
1451 | expand_builtin_classify_type (arglist) | |
1452 | tree arglist; | |
1453 | { | |
1454 | if (arglist != 0) | |
539a3a92 | 1455 | return GEN_INT (type_to_class (TREE_TYPE (TREE_VALUE (arglist)))); |
53800dbe | 1456 | return GEN_INT (no_type_class); |
1457 | } | |
1458 | ||
1459 | /* Expand expression EXP, which is a call to __builtin_constant_p. */ | |
27d0c333 | 1460 | |
53800dbe | 1461 | static rtx |
1462 | expand_builtin_constant_p (exp) | |
1463 | tree exp; | |
1464 | { | |
1465 | tree arglist = TREE_OPERAND (exp, 1); | |
1466 | enum machine_mode value_mode = TYPE_MODE (TREE_TYPE (exp)); | |
650e4c94 | 1467 | rtx tmp; |
53800dbe | 1468 | |
1469 | if (arglist == 0) | |
1470 | return const0_rtx; | |
650e4c94 | 1471 | arglist = TREE_VALUE (arglist); |
53800dbe | 1472 | |
650e4c94 | 1473 | /* We have taken care of the easy cases during constant folding. This |
c7926a82 | 1474 | case is not obvious, so emit (constant_p_rtx (ARGLIST)) and let CSE |
1475 | get a chance to see if it can deduce whether ARGLIST is constant. */ | |
53800dbe | 1476 | |
e6f295fb | 1477 | current_function_calls_constant_p = 1; |
1478 | ||
650e4c94 | 1479 | tmp = expand_expr (arglist, NULL_RTX, VOIDmode, 0); |
1480 | tmp = gen_rtx_CONSTANT_P_RTX (value_mode, tmp); | |
1481 | return tmp; | |
53800dbe | 1482 | } |
1483 | ||
0a68165a | 1484 | /* Return mathematic function equivalent to FN but operating directly on TYPE, |
1485 | if available. */ | |
1486 | tree | |
1487 | mathfn_built_in (type, fn) | |
1488 | tree type; | |
1489 | enum built_in_function fn; | |
1490 | { | |
1491 | enum built_in_function fcode = NOT_BUILT_IN; | |
1492 | if (TYPE_MODE (type) == TYPE_MODE (double_type_node)) | |
1493 | switch (fn) | |
1494 | { | |
1495 | case BUILT_IN_SQRT: | |
1496 | case BUILT_IN_SQRTF: | |
1497 | case BUILT_IN_SQRTL: | |
1498 | fcode = BUILT_IN_SQRT; | |
1499 | break; | |
1500 | case BUILT_IN_SIN: | |
1501 | case BUILT_IN_SINF: | |
1502 | case BUILT_IN_SINL: | |
1503 | fcode = BUILT_IN_SIN; | |
1504 | break; | |
1505 | case BUILT_IN_COS: | |
1506 | case BUILT_IN_COSF: | |
1507 | case BUILT_IN_COSL: | |
1508 | fcode = BUILT_IN_COS; | |
1509 | break; | |
1510 | case BUILT_IN_EXP: | |
1511 | case BUILT_IN_EXPF: | |
1512 | case BUILT_IN_EXPL: | |
1513 | fcode = BUILT_IN_EXP; | |
1514 | break; | |
fa426235 | 1515 | case BUILT_IN_LOG: |
1516 | case BUILT_IN_LOGF: | |
1517 | case BUILT_IN_LOGL: | |
1518 | fcode = BUILT_IN_LOG; | |
1519 | break; | |
0a68165a | 1520 | case BUILT_IN_FLOOR: |
1521 | case BUILT_IN_FLOORF: | |
1522 | case BUILT_IN_FLOORL: | |
1523 | fcode = BUILT_IN_FLOOR; | |
1524 | break; | |
1525 | case BUILT_IN_CEIL: | |
1526 | case BUILT_IN_CEILF: | |
1527 | case BUILT_IN_CEILL: | |
1528 | fcode = BUILT_IN_CEIL; | |
1529 | break; | |
1530 | case BUILT_IN_TRUNC: | |
1531 | case BUILT_IN_TRUNCF: | |
1532 | case BUILT_IN_TRUNCL: | |
1533 | fcode = BUILT_IN_TRUNC; | |
1534 | break; | |
1535 | case BUILT_IN_ROUND: | |
1536 | case BUILT_IN_ROUNDF: | |
1537 | case BUILT_IN_ROUNDL: | |
1538 | fcode = BUILT_IN_ROUND; | |
1539 | break; | |
1540 | case BUILT_IN_NEARBYINT: | |
1541 | case BUILT_IN_NEARBYINTF: | |
1542 | case BUILT_IN_NEARBYINTL: | |
1543 | fcode = BUILT_IN_NEARBYINT; | |
1544 | break; | |
1545 | default: | |
1546 | abort (); | |
1547 | } | |
1548 | else if (TYPE_MODE (type) == TYPE_MODE (float_type_node)) | |
1549 | switch (fn) | |
1550 | { | |
1551 | case BUILT_IN_SQRT: | |
1552 | case BUILT_IN_SQRTF: | |
1553 | case BUILT_IN_SQRTL: | |
1554 | fcode = BUILT_IN_SQRTF; | |
1555 | break; | |
1556 | case BUILT_IN_SIN: | |
1557 | case BUILT_IN_SINF: | |
1558 | case BUILT_IN_SINL: | |
1559 | fcode = BUILT_IN_SINF; | |
1560 | break; | |
1561 | case BUILT_IN_COS: | |
1562 | case BUILT_IN_COSF: | |
1563 | case BUILT_IN_COSL: | |
1564 | fcode = BUILT_IN_COSF; | |
1565 | break; | |
1566 | case BUILT_IN_EXP: | |
1567 | case BUILT_IN_EXPF: | |
1568 | case BUILT_IN_EXPL: | |
1569 | fcode = BUILT_IN_EXPF; | |
1570 | break; | |
fa426235 | 1571 | case BUILT_IN_LOG: |
1572 | case BUILT_IN_LOGF: | |
1573 | case BUILT_IN_LOGL: | |
1574 | fcode = BUILT_IN_LOGF; | |
1575 | break; | |
0a68165a | 1576 | case BUILT_IN_FLOOR: |
1577 | case BUILT_IN_FLOORF: | |
1578 | case BUILT_IN_FLOORL: | |
1579 | fcode = BUILT_IN_FLOORF; | |
1580 | break; | |
1581 | case BUILT_IN_CEIL: | |
1582 | case BUILT_IN_CEILF: | |
1583 | case BUILT_IN_CEILL: | |
1584 | fcode = BUILT_IN_CEILF; | |
1585 | break; | |
1586 | case BUILT_IN_TRUNC: | |
1587 | case BUILT_IN_TRUNCF: | |
1588 | case BUILT_IN_TRUNCL: | |
1589 | fcode = BUILT_IN_TRUNCF; | |
1590 | break; | |
1591 | case BUILT_IN_ROUND: | |
1592 | case BUILT_IN_ROUNDF: | |
1593 | case BUILT_IN_ROUNDL: | |
1594 | fcode = BUILT_IN_ROUNDF; | |
1595 | break; | |
1596 | case BUILT_IN_NEARBYINT: | |
1597 | case BUILT_IN_NEARBYINTF: | |
1598 | case BUILT_IN_NEARBYINTL: | |
1599 | fcode = BUILT_IN_NEARBYINTF; | |
1600 | break; | |
1601 | default: | |
1602 | abort (); | |
1603 | } | |
1604 | else if (TYPE_MODE (type) == TYPE_MODE (long_double_type_node)) | |
1605 | switch (fn) | |
1606 | { | |
1607 | case BUILT_IN_SQRT: | |
1608 | case BUILT_IN_SQRTF: | |
1609 | case BUILT_IN_SQRTL: | |
1610 | fcode = BUILT_IN_SQRTL; | |
1611 | break; | |
1612 | case BUILT_IN_SIN: | |
1613 | case BUILT_IN_SINF: | |
1614 | case BUILT_IN_SINL: | |
1615 | fcode = BUILT_IN_SINL; | |
1616 | break; | |
1617 | case BUILT_IN_COS: | |
1618 | case BUILT_IN_COSF: | |
1619 | case BUILT_IN_COSL: | |
1620 | fcode = BUILT_IN_COSL; | |
1621 | break; | |
1622 | case BUILT_IN_EXP: | |
1623 | case BUILT_IN_EXPF: | |
1624 | case BUILT_IN_EXPL: | |
1625 | fcode = BUILT_IN_EXPL; | |
1626 | break; | |
fa426235 | 1627 | case BUILT_IN_LOG: |
1628 | case BUILT_IN_LOGF: | |
1629 | case BUILT_IN_LOGL: | |
1630 | fcode = BUILT_IN_LOGL; | |
1631 | break; | |
0a68165a | 1632 | case BUILT_IN_FLOOR: |
1633 | case BUILT_IN_FLOORF: | |
1634 | case BUILT_IN_FLOORL: | |
1635 | fcode = BUILT_IN_FLOORL; | |
1636 | break; | |
1637 | case BUILT_IN_CEIL: | |
1638 | case BUILT_IN_CEILF: | |
1639 | case BUILT_IN_CEILL: | |
1640 | fcode = BUILT_IN_CEILL; | |
1641 | break; | |
1642 | case BUILT_IN_TRUNC: | |
1643 | case BUILT_IN_TRUNCF: | |
1644 | case BUILT_IN_TRUNCL: | |
1645 | fcode = BUILT_IN_TRUNCL; | |
1646 | break; | |
1647 | case BUILT_IN_ROUND: | |
1648 | case BUILT_IN_ROUNDF: | |
1649 | case BUILT_IN_ROUNDL: | |
1650 | fcode = BUILT_IN_ROUNDL; | |
1651 | break; | |
1652 | case BUILT_IN_NEARBYINT: | |
1653 | case BUILT_IN_NEARBYINTF: | |
1654 | case BUILT_IN_NEARBYINTL: | |
1655 | fcode = BUILT_IN_NEARBYINTL; | |
1656 | break; | |
1657 | default: | |
1658 | abort (); | |
1659 | } | |
1660 | return implicit_built_in_decls[fcode]; | |
1661 | } | |
1662 | ||
0fd605a5 | 1663 | /* If errno must be maintained, expand the RTL to check if the result, |
1664 | TARGET, of a built-in function call, EXP, is NaN, and if so set | |
1665 | errno to EDOM. */ | |
1666 | ||
1667 | static void | |
1668 | expand_errno_check (exp, target) | |
1669 | tree exp; | |
1670 | rtx target; | |
1671 | { | |
1672 | rtx lab; | |
1673 | ||
a4356fb9 | 1674 | if (flag_errno_math && HONOR_NANS (GET_MODE (target))) |
0fd605a5 | 1675 | { |
1676 | lab = gen_label_rtx (); | |
1677 | ||
1678 | /* Test the result; if it is NaN, set errno=EDOM because | |
1679 | the argument was not in the domain. */ | |
1680 | emit_cmp_and_jump_insns (target, target, EQ, 0, GET_MODE (target), | |
1681 | 0, lab); | |
1682 | ||
1683 | #ifdef TARGET_EDOM | |
1684 | { | |
1685 | #ifdef GEN_ERRNO_RTX | |
1686 | rtx errno_rtx = GEN_ERRNO_RTX; | |
1687 | #else | |
1688 | rtx errno_rtx | |
1689 | = gen_rtx_MEM (word_mode, gen_rtx_SYMBOL_REF (Pmode, "errno")); | |
1690 | #endif | |
1691 | ||
1692 | emit_move_insn (errno_rtx, GEN_INT (TARGET_EDOM)); | |
1693 | } | |
1694 | #else | |
1695 | /* We can't set errno=EDOM directly; let the library call do it. | |
1696 | Pop the arguments right away in case the call gets deleted. */ | |
1697 | NO_DEFER_POP; | |
1698 | expand_call (exp, target, 0); | |
1699 | OK_DEFER_POP; | |
1700 | #endif | |
1701 | ||
1702 | emit_label (lab); | |
1703 | } | |
1704 | } | |
1705 | ||
1706 | ||
53800dbe | 1707 | /* Expand a call to one of the builtin math functions (sin, cos, or sqrt). |
1708 | Return 0 if a normal call should be emitted rather than expanding the | |
1709 | function in-line. EXP is the expression that is a call to the builtin | |
1710 | function; if convenient, the result should be placed in TARGET. | |
1711 | SUBTARGET may be used as the target for computing one of EXP's operands. */ | |
27d0c333 | 1712 | |
53800dbe | 1713 | static rtx |
1714 | expand_builtin_mathfn (exp, target, subtarget) | |
1715 | tree exp; | |
1716 | rtx target, subtarget; | |
1717 | { | |
bf8e3599 | 1718 | optab builtin_optab; |
53800dbe | 1719 | rtx op0, insns; |
1720 | tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); | |
1721 | tree arglist = TREE_OPERAND (exp, 1); | |
920d0fb5 | 1722 | enum machine_mode argmode; |
805e22b2 | 1723 | bool errno_set = true; |
53800dbe | 1724 | |
0eb671f7 | 1725 | if (!validate_arglist (arglist, REAL_TYPE, VOID_TYPE)) |
53800dbe | 1726 | return 0; |
1727 | ||
1728 | /* Stabilize and compute the argument. */ | |
1729 | if (TREE_CODE (TREE_VALUE (arglist)) != VAR_DECL | |
1730 | && TREE_CODE (TREE_VALUE (arglist)) != PARM_DECL) | |
1731 | { | |
1732 | exp = copy_node (exp); | |
53800dbe | 1733 | TREE_OPERAND (exp, 1) = arglist; |
f6326164 | 1734 | /* Wrap the computation of the argument in a SAVE_EXPR. That |
1735 | way, if we need to expand the argument again (as in the | |
1736 | flag_errno_math case below where we cannot directly set | |
1737 | errno), we will not perform side-effects more than once. | |
1738 | Note that here we're mutating the original EXP as well as the | |
1739 | copy; that's the right thing to do in case the original EXP | |
1740 | is expanded later. */ | |
53800dbe | 1741 | TREE_VALUE (arglist) = save_expr (TREE_VALUE (arglist)); |
f6326164 | 1742 | arglist = copy_node (arglist); |
53800dbe | 1743 | } |
1744 | op0 = expand_expr (TREE_VALUE (arglist), subtarget, VOIDmode, 0); | |
1745 | ||
1746 | /* Make a suitable register to place result in. */ | |
1747 | target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp))); | |
1748 | ||
1749 | emit_queue (); | |
1750 | start_sequence (); | |
1751 | ||
1752 | switch (DECL_FUNCTION_CODE (fndecl)) | |
1753 | { | |
d2d4bdde | 1754 | case BUILT_IN_SIN: |
1755 | case BUILT_IN_SINF: | |
1756 | case BUILT_IN_SINL: | |
53800dbe | 1757 | builtin_optab = sin_optab; break; |
d2d4bdde | 1758 | case BUILT_IN_COS: |
1759 | case BUILT_IN_COSF: | |
1760 | case BUILT_IN_COSL: | |
53800dbe | 1761 | builtin_optab = cos_optab; break; |
75357f66 | 1762 | case BUILT_IN_SQRT: |
d2d4bdde | 1763 | case BUILT_IN_SQRTF: |
1764 | case BUILT_IN_SQRTL: | |
53800dbe | 1765 | builtin_optab = sqrt_optab; break; |
42721db0 | 1766 | case BUILT_IN_EXP: |
1767 | case BUILT_IN_EXPF: | |
1768 | case BUILT_IN_EXPL: | |
1769 | builtin_optab = exp_optab; break; | |
1770 | case BUILT_IN_LOG: | |
1771 | case BUILT_IN_LOGF: | |
1772 | case BUILT_IN_LOGL: | |
1773 | builtin_optab = log_optab; break; | |
805e22b2 | 1774 | case BUILT_IN_FLOOR: |
1775 | case BUILT_IN_FLOORF: | |
1776 | case BUILT_IN_FLOORL: | |
1777 | errno_set = false ; builtin_optab = floor_optab; break; | |
1778 | case BUILT_IN_CEIL: | |
1779 | case BUILT_IN_CEILF: | |
1780 | case BUILT_IN_CEILL: | |
1781 | errno_set = false ; builtin_optab = ceil_optab; break; | |
1782 | case BUILT_IN_TRUNC: | |
1783 | case BUILT_IN_TRUNCF: | |
1784 | case BUILT_IN_TRUNCL: | |
1785 | errno_set = false ; builtin_optab = trunc_optab; break; | |
1786 | case BUILT_IN_ROUND: | |
1787 | case BUILT_IN_ROUNDF: | |
1788 | case BUILT_IN_ROUNDL: | |
1789 | errno_set = false ; builtin_optab = round_optab; break; | |
1790 | case BUILT_IN_NEARBYINT: | |
1791 | case BUILT_IN_NEARBYINTF: | |
1792 | case BUILT_IN_NEARBYINTL: | |
1793 | errno_set = false ; builtin_optab = nearbyint_optab; break; | |
42721db0 | 1794 | default: |
53800dbe | 1795 | abort (); |
1796 | } | |
1797 | ||
1798 | /* Compute into TARGET. | |
1799 | Set TARGET to wherever the result comes back. */ | |
920d0fb5 | 1800 | argmode = TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))); |
1801 | target = expand_unop (argmode, builtin_optab, op0, target, 0); | |
53800dbe | 1802 | |
1803 | /* If we were unable to expand via the builtin, stop the | |
1804 | sequence (without outputting the insns) and return 0, causing | |
1805 | a call to the library function. */ | |
1806 | if (target == 0) | |
1807 | { | |
1808 | end_sequence (); | |
1809 | return 0; | |
1810 | } | |
1811 | ||
a4356fb9 | 1812 | if (errno_set) |
1813 | expand_errno_check (exp, target); | |
53800dbe | 1814 | |
0fd605a5 | 1815 | /* Output the entire sequence. */ |
1816 | insns = get_insns (); | |
1817 | end_sequence (); | |
1818 | emit_insn (insns); | |
1819 | ||
1820 | return target; | |
1821 | } | |
1822 | ||
1823 | /* Expand a call to the builtin binary math functions (pow and atan2). | |
1824 | Return 0 if a normal call should be emitted rather than expanding the | |
1825 | function in-line. EXP is the expression that is a call to the builtin | |
1826 | function; if convenient, the result should be placed in TARGET. | |
1827 | SUBTARGET may be used as the target for computing one of EXP's | |
1828 | operands. */ | |
1829 | ||
1830 | static rtx | |
1831 | expand_builtin_mathfn_2 (exp, target, subtarget) | |
1832 | tree exp; | |
1833 | rtx target, subtarget; | |
1834 | { | |
1835 | optab builtin_optab; | |
1836 | rtx op0, op1, insns; | |
1837 | tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); | |
1838 | tree arglist = TREE_OPERAND (exp, 1); | |
1839 | tree arg0, arg1; | |
1840 | enum machine_mode argmode; | |
1841 | bool errno_set = true; | |
1842 | bool stable = true; | |
1843 | ||
1844 | if (!validate_arglist (arglist, REAL_TYPE, REAL_TYPE, VOID_TYPE)) | |
1845 | return 0; | |
1846 | ||
1847 | arg0 = TREE_VALUE (arglist); | |
1848 | arg1 = TREE_VALUE (TREE_CHAIN (arglist)); | |
1849 | ||
1850 | /* Stabilize the arguments. */ | |
1851 | if (TREE_CODE (arg0) != VAR_DECL && TREE_CODE (arg0) != PARM_DECL) | |
1852 | { | |
1853 | arg0 = save_expr (arg0); | |
1854 | TREE_VALUE (arglist) = arg0; | |
1855 | stable = false; | |
1856 | } | |
1857 | if (TREE_CODE (arg1) != VAR_DECL && TREE_CODE (arg1) != PARM_DECL) | |
53800dbe | 1858 | { |
0fd605a5 | 1859 | arg1 = save_expr (arg1); |
1860 | TREE_VALUE (TREE_CHAIN (arglist)) = arg1; | |
1861 | stable = false; | |
1862 | } | |
53800dbe | 1863 | |
0fd605a5 | 1864 | if (! stable) |
1865 | { | |
1866 | exp = copy_node (exp); | |
1867 | arglist = tree_cons (NULL_TREE, arg0, | |
1868 | build_tree_list (NULL_TREE, arg1)); | |
1869 | TREE_OPERAND (exp, 1) = arglist; | |
1870 | } | |
53800dbe | 1871 | |
0fd605a5 | 1872 | op0 = expand_expr (arg0, subtarget, VOIDmode, 0); |
1873 | op1 = expand_expr (arg1, 0, VOIDmode, 0); | |
53800dbe | 1874 | |
0fd605a5 | 1875 | /* Make a suitable register to place result in. */ |
1876 | target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp))); | |
53800dbe | 1877 | |
0fd605a5 | 1878 | emit_queue (); |
1879 | start_sequence (); | |
1880 | ||
1881 | switch (DECL_FUNCTION_CODE (fndecl)) | |
1882 | { | |
1883 | case BUILT_IN_POW: | |
1884 | case BUILT_IN_POWF: | |
1885 | case BUILT_IN_POWL: | |
1886 | builtin_optab = pow_optab; break; | |
1887 | case BUILT_IN_ATAN2: | |
1888 | case BUILT_IN_ATAN2F: | |
1889 | case BUILT_IN_ATAN2L: | |
1890 | builtin_optab = atan2_optab; break; | |
1891 | default: | |
1892 | abort (); | |
1893 | } | |
1894 | ||
1895 | /* Compute into TARGET. | |
1896 | Set TARGET to wherever the result comes back. */ | |
1897 | argmode = TYPE_MODE (TREE_TYPE (arg0)); | |
1898 | target = expand_binop (argmode, builtin_optab, op0, op1, | |
1899 | target, 0, OPTAB_DIRECT); | |
53800dbe | 1900 | |
0fd605a5 | 1901 | /* If we were unable to expand via the builtin, stop the |
1902 | sequence (without outputting the insns) and return 0, causing | |
1903 | a call to the library function. */ | |
1904 | if (target == 0) | |
1905 | { | |
1906 | end_sequence (); | |
1907 | return 0; | |
53800dbe | 1908 | } |
1909 | ||
a4356fb9 | 1910 | if (errno_set) |
1911 | expand_errno_check (exp, target); | |
0fd605a5 | 1912 | |
53800dbe | 1913 | /* Output the entire sequence. */ |
1914 | insns = get_insns (); | |
1915 | end_sequence (); | |
31d3e01c | 1916 | emit_insn (insns); |
bf8e3599 | 1917 | |
53800dbe | 1918 | return target; |
1919 | } | |
1920 | ||
1921 | /* Expand expression EXP which is a call to the strlen builtin. Return 0 | |
1922 | if we failed the caller should emit a normal call, otherwise | |
aed0bd19 | 1923 | try to get the result in TARGET, if convenient. */ |
f7c44134 | 1924 | |
53800dbe | 1925 | static rtx |
aed0bd19 | 1926 | expand_builtin_strlen (exp, target) |
53800dbe | 1927 | tree exp; |
1928 | rtx target; | |
53800dbe | 1929 | { |
1930 | tree arglist = TREE_OPERAND (exp, 1); | |
1931 | enum machine_mode value_mode = TYPE_MODE (TREE_TYPE (exp)); | |
1932 | ||
0eb671f7 | 1933 | if (!validate_arglist (arglist, POINTER_TYPE, VOID_TYPE)) |
53800dbe | 1934 | return 0; |
1935 | else | |
1936 | { | |
911c0150 | 1937 | rtx pat; |
6248e345 | 1938 | tree len, src = TREE_VALUE (arglist); |
911c0150 | 1939 | rtx result, src_reg, char_rtx, before_strlen; |
53800dbe | 1940 | enum machine_mode insn_mode = value_mode, char_mode; |
ef2c4a29 | 1941 | enum insn_code icode = CODE_FOR_nothing; |
6248e345 | 1942 | int align; |
1943 | ||
1944 | /* If the length can be computed at compile-time, return it. */ | |
1945 | len = c_strlen (src); | |
1946 | if (len) | |
1947 | return expand_expr (len, target, value_mode, EXPAND_NORMAL); | |
1948 | ||
1949 | align = get_pointer_alignment (src, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
53800dbe | 1950 | |
53800dbe | 1951 | /* If SRC is not a pointer type, don't do this operation inline. */ |
1952 | if (align == 0) | |
1953 | return 0; | |
1954 | ||
911c0150 | 1955 | /* Bail out if we can't compute strlen in the right mode. */ |
53800dbe | 1956 | while (insn_mode != VOIDmode) |
1957 | { | |
1958 | icode = strlen_optab->handlers[(int) insn_mode].insn_code; | |
1959 | if (icode != CODE_FOR_nothing) | |
c28ae87f | 1960 | break; |
53800dbe | 1961 | |
1962 | insn_mode = GET_MODE_WIDER_MODE (insn_mode); | |
1963 | } | |
1964 | if (insn_mode == VOIDmode) | |
1965 | return 0; | |
1966 | ||
1967 | /* Make a place to write the result of the instruction. */ | |
1968 | result = target; | |
1969 | if (! (result != 0 | |
1970 | && GET_CODE (result) == REG | |
1971 | && GET_MODE (result) == insn_mode | |
1972 | && REGNO (result) >= FIRST_PSEUDO_REGISTER)) | |
1973 | result = gen_reg_rtx (insn_mode); | |
1974 | ||
911c0150 | 1975 | /* Make a place to hold the source address. We will not expand |
1976 | the actual source until we are sure that the expansion will | |
1977 | not fail -- there are trees that cannot be expanded twice. */ | |
1978 | src_reg = gen_reg_rtx (Pmode); | |
53800dbe | 1979 | |
911c0150 | 1980 | /* Mark the beginning of the strlen sequence so we can emit the |
1981 | source operand later. */ | |
f0ce3b1f | 1982 | before_strlen = get_last_insn (); |
53800dbe | 1983 | |
53800dbe | 1984 | char_rtx = const0_rtx; |
f7c44134 | 1985 | char_mode = insn_data[(int) icode].operand[2].mode; |
1986 | if (! (*insn_data[(int) icode].operand[2].predicate) (char_rtx, | |
1987 | char_mode)) | |
53800dbe | 1988 | char_rtx = copy_to_mode_reg (char_mode, char_rtx); |
1989 | ||
911c0150 | 1990 | pat = GEN_FCN (icode) (result, gen_rtx_MEM (BLKmode, src_reg), |
1991 | char_rtx, GEN_INT (align)); | |
1992 | if (! pat) | |
1993 | return 0; | |
1994 | emit_insn (pat); | |
1995 | ||
1996 | /* Now that we are assured of success, expand the source. */ | |
1997 | start_sequence (); | |
bf8e3599 | 1998 | pat = memory_address (BLKmode, |
f7c44134 | 1999 | expand_expr (src, src_reg, ptr_mode, EXPAND_SUM)); |
911c0150 | 2000 | if (pat != src_reg) |
2001 | emit_move_insn (src_reg, pat); | |
31d3e01c | 2002 | pat = get_insns (); |
911c0150 | 2003 | end_sequence (); |
bceb0d1f | 2004 | |
2005 | if (before_strlen) | |
2006 | emit_insn_after (pat, before_strlen); | |
2007 | else | |
2008 | emit_insn_before (pat, get_insns ()); | |
53800dbe | 2009 | |
2010 | /* Return the value in the proper mode for this function. */ | |
2011 | if (GET_MODE (result) == value_mode) | |
911c0150 | 2012 | target = result; |
53800dbe | 2013 | else if (target != 0) |
911c0150 | 2014 | convert_move (target, result, 0); |
53800dbe | 2015 | else |
911c0150 | 2016 | target = convert_to_mode (value_mode, result, 0); |
2017 | ||
2018 | return target; | |
53800dbe | 2019 | } |
2020 | } | |
2021 | ||
17f5ea87 | 2022 | /* Expand a call to the strstr builtin. Return 0 if we failed the |
2023 | caller should emit a normal call, otherwise try to get the result | |
2024 | in TARGET, if convenient (and in mode MODE if that's convenient). */ | |
2025 | ||
2026 | static rtx | |
2027 | expand_builtin_strstr (arglist, target, mode) | |
2028 | tree arglist; | |
2029 | rtx target; | |
2030 | enum machine_mode mode; | |
2031 | { | |
8a06f2d4 | 2032 | if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
17f5ea87 | 2033 | return 0; |
2034 | else | |
2035 | { | |
2036 | tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
7e15618b | 2037 | tree fn; |
83d79705 | 2038 | const char *p1, *p2; |
17f5ea87 | 2039 | |
83d79705 | 2040 | p2 = c_getstr (s2); |
2041 | if (p2 == NULL) | |
17f5ea87 | 2042 | return 0; |
2043 | ||
83d79705 | 2044 | p1 = c_getstr (s1); |
2045 | if (p1 != NULL) | |
2046 | { | |
2047 | const char *r = strstr (p1, p2); | |
17f5ea87 | 2048 | |
83d79705 | 2049 | if (r == NULL) |
2050 | return const0_rtx; | |
17f5ea87 | 2051 | |
83d79705 | 2052 | /* Return an offset into the constant string argument. */ |
2053 | return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1), | |
2054 | s1, ssize_int (r - p1))), | |
2055 | target, mode, EXPAND_NORMAL); | |
17f5ea87 | 2056 | } |
83d79705 | 2057 | |
2058 | if (p2[0] == '\0') | |
2059 | return expand_expr (s1, target, mode, EXPAND_NORMAL); | |
2060 | ||
2061 | if (p2[1] != '\0') | |
2062 | return 0; | |
2063 | ||
0a68165a | 2064 | fn = implicit_built_in_decls[BUILT_IN_STRCHR]; |
83d79705 | 2065 | if (!fn) |
2066 | return 0; | |
2067 | ||
2068 | /* New argument list transforming strstr(s1, s2) to | |
2069 | strchr(s1, s2[0]). */ | |
2070 | arglist = | |
2071 | build_tree_list (NULL_TREE, build_int_2 (p2[0], 0)); | |
2072 | arglist = tree_cons (NULL_TREE, s1, arglist); | |
7e15618b | 2073 | return expand_expr (build_function_call_expr (fn, arglist), |
2074 | target, mode, EXPAND_NORMAL); | |
17f5ea87 | 2075 | } |
2076 | } | |
2077 | ||
83d79705 | 2078 | /* Expand a call to the strchr builtin. Return 0 if we failed the |
46f3a74a | 2079 | caller should emit a normal call, otherwise try to get the result |
2080 | in TARGET, if convenient (and in mode MODE if that's convenient). */ | |
2081 | ||
2082 | static rtx | |
83d79705 | 2083 | expand_builtin_strchr (arglist, target, mode) |
46f3a74a | 2084 | tree arglist; |
2085 | rtx target; | |
2086 | enum machine_mode mode; | |
2087 | { | |
8a06f2d4 | 2088 | if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
46f3a74a | 2089 | return 0; |
2090 | else | |
2091 | { | |
2092 | tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
83d79705 | 2093 | const char *p1; |
46f3a74a | 2094 | |
83d79705 | 2095 | if (TREE_CODE (s2) != INTEGER_CST) |
2096 | return 0; | |
2097 | ||
2098 | p1 = c_getstr (s1); | |
2099 | if (p1 != NULL) | |
2100 | { | |
ecc318ff | 2101 | char c; |
2102 | const char *r; | |
2103 | ||
2104 | if (target_char_cast (s2, &c)) | |
2105 | return 0; | |
2106 | ||
2107 | r = strchr (p1, c); | |
83d79705 | 2108 | |
2109 | if (r == NULL) | |
46f3a74a | 2110 | return const0_rtx; |
83d79705 | 2111 | |
2112 | /* Return an offset into the constant string argument. */ | |
2113 | return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1), | |
2114 | s1, ssize_int (r - p1))), | |
2115 | target, mode, EXPAND_NORMAL); | |
46f3a74a | 2116 | } |
2117 | ||
83d79705 | 2118 | /* FIXME: Should use here strchrM optab so that ports can optimize |
2119 | this. */ | |
2120 | return 0; | |
2121 | } | |
2122 | } | |
2123 | ||
2124 | /* Expand a call to the strrchr builtin. Return 0 if we failed the | |
2125 | caller should emit a normal call, otherwise try to get the result | |
2126 | in TARGET, if convenient (and in mode MODE if that's convenient). */ | |
2127 | ||
2128 | static rtx | |
2129 | expand_builtin_strrchr (arglist, target, mode) | |
2130 | tree arglist; | |
2131 | rtx target; | |
2132 | enum machine_mode mode; | |
2133 | { | |
8a06f2d4 | 2134 | if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
83d79705 | 2135 | return 0; |
2136 | else | |
2137 | { | |
2138 | tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
7e15618b | 2139 | tree fn; |
83d79705 | 2140 | const char *p1; |
2141 | ||
2142 | if (TREE_CODE (s2) != INTEGER_CST) | |
46f3a74a | 2143 | return 0; |
2144 | ||
83d79705 | 2145 | p1 = c_getstr (s1); |
2146 | if (p1 != NULL) | |
2147 | { | |
ecc318ff | 2148 | char c; |
2149 | const char *r; | |
2150 | ||
2151 | if (target_char_cast (s2, &c)) | |
2152 | return 0; | |
2153 | ||
2154 | r = strrchr (p1, c); | |
83d79705 | 2155 | |
2156 | if (r == NULL) | |
46f3a74a | 2157 | return const0_rtx; |
46f3a74a | 2158 | |
83d79705 | 2159 | /* Return an offset into the constant string argument. */ |
2160 | return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1), | |
2161 | s1, ssize_int (r - p1))), | |
2162 | target, mode, EXPAND_NORMAL); | |
2163 | } | |
46f3a74a | 2164 | |
83d79705 | 2165 | if (! integer_zerop (s2)) |
2166 | return 0; | |
2167 | ||
0a68165a | 2168 | fn = implicit_built_in_decls[BUILT_IN_STRCHR]; |
83d79705 | 2169 | if (!fn) |
2170 | return 0; | |
2171 | ||
2172 | /* Transform strrchr(s1, '\0') to strchr(s1, '\0'). */ | |
7e15618b | 2173 | return expand_expr (build_function_call_expr (fn, arglist), |
2174 | target, mode, EXPAND_NORMAL); | |
83d79705 | 2175 | } |
2176 | } | |
2177 | ||
2178 | /* Expand a call to the strpbrk builtin. Return 0 if we failed the | |
2179 | caller should emit a normal call, otherwise try to get the result | |
2180 | in TARGET, if convenient (and in mode MODE if that's convenient). */ | |
2181 | ||
2182 | static rtx | |
2183 | expand_builtin_strpbrk (arglist, target, mode) | |
2184 | tree arglist; | |
2185 | rtx target; | |
2186 | enum machine_mode mode; | |
2187 | { | |
8a06f2d4 | 2188 | if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
83d79705 | 2189 | return 0; |
2190 | else | |
2191 | { | |
2192 | tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
7e15618b | 2193 | tree fn; |
83d79705 | 2194 | const char *p1, *p2; |
2195 | ||
2196 | p2 = c_getstr (s2); | |
2197 | if (p2 == NULL) | |
2198 | return 0; | |
2199 | ||
2200 | p1 = c_getstr (s1); | |
2201 | if (p1 != NULL) | |
2202 | { | |
2203 | const char *r = strpbrk (p1, p2); | |
2204 | ||
2205 | if (r == NULL) | |
2206 | return const0_rtx; | |
2207 | ||
2208 | /* Return an offset into the constant string argument. */ | |
2209 | return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1), | |
2210 | s1, ssize_int (r - p1))), | |
2211 | target, mode, EXPAND_NORMAL); | |
46f3a74a | 2212 | } |
83d79705 | 2213 | |
2214 | if (p2[0] == '\0') | |
2215 | { | |
2216 | /* strpbrk(x, "") == NULL. | |
2217 | Evaluate and ignore the arguments in case they had | |
2218 | side-effects. */ | |
2219 | expand_expr (s1, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2220 | return const0_rtx; | |
2221 | } | |
2222 | ||
2223 | if (p2[1] != '\0') | |
2224 | return 0; /* Really call strpbrk. */ | |
2225 | ||
0a68165a | 2226 | fn = implicit_built_in_decls[BUILT_IN_STRCHR]; |
83d79705 | 2227 | if (!fn) |
2228 | return 0; | |
2229 | ||
2230 | /* New argument list transforming strpbrk(s1, s2) to | |
2231 | strchr(s1, s2[0]). */ | |
2232 | arglist = | |
2233 | build_tree_list (NULL_TREE, build_int_2 (p2[0], 0)); | |
2234 | arglist = tree_cons (NULL_TREE, s1, arglist); | |
7e15618b | 2235 | return expand_expr (build_function_call_expr (fn, arglist), |
2236 | target, mode, EXPAND_NORMAL); | |
46f3a74a | 2237 | } |
2238 | } | |
2239 | ||
6840589f | 2240 | /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE) |
2241 | bytes from constant string DATA + OFFSET and return it as target | |
2242 | constant. */ | |
2243 | ||
2244 | static rtx | |
2245 | builtin_memcpy_read_str (data, offset, mode) | |
2246 | PTR data; | |
2247 | HOST_WIDE_INT offset; | |
2248 | enum machine_mode mode; | |
2249 | { | |
2250 | const char *str = (const char *) data; | |
2251 | ||
27d0c333 | 2252 | if (offset < 0 |
2253 | || ((unsigned HOST_WIDE_INT) offset + GET_MODE_SIZE (mode) | |
2254 | > strlen (str) + 1)) | |
6840589f | 2255 | abort (); /* Attempt to read past the end of constant string. */ |
2256 | ||
2257 | return c_readstr (str + offset, mode); | |
2258 | } | |
2259 | ||
6f428e8b | 2260 | /* Expand a call to the memcpy builtin, with arguments in ARGLIST. |
3b824fa6 | 2261 | Return 0 if we failed, the caller should emit a normal call, |
2262 | otherwise try to get the result in TARGET, if convenient (and in | |
2263 | mode MODE if that's convenient). If ENDP is 0 return the | |
2264 | destination pointer, if ENDP is 1 return the end pointer ala | |
2265 | mempcpy, and if ENDP is 2 return the end pointer minus one ala | |
2266 | stpcpy. */ | |
53800dbe | 2267 | static rtx |
3b824fa6 | 2268 | expand_builtin_memcpy (arglist, target, mode, endp) |
53800dbe | 2269 | tree arglist; |
6f428e8b | 2270 | rtx target; |
2271 | enum machine_mode mode; | |
3b824fa6 | 2272 | int endp; |
53800dbe | 2273 | { |
0eb671f7 | 2274 | if (!validate_arglist (arglist, |
2275 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
53800dbe | 2276 | return 0; |
2277 | else | |
2278 | { | |
2279 | tree dest = TREE_VALUE (arglist); | |
2280 | tree src = TREE_VALUE (TREE_CHAIN (arglist)); | |
2281 | tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
6840589f | 2282 | const char *src_str; |
53800dbe | 2283 | |
27d0c333 | 2284 | unsigned int src_align = get_pointer_alignment (src, BIGGEST_ALIGNMENT); |
2285 | unsigned int dest_align | |
2286 | = get_pointer_alignment (dest, BIGGEST_ALIGNMENT); | |
53800dbe | 2287 | rtx dest_mem, src_mem, dest_addr, len_rtx; |
2288 | ||
6f428e8b | 2289 | /* If DEST is not a pointer type, call the normal function. */ |
2290 | if (dest_align == 0) | |
9342ee68 | 2291 | return 0; |
6f428e8b | 2292 | |
2293 | /* If the LEN parameter is zero, return DEST. */ | |
2294 | if (host_integerp (len, 1) && tree_low_cst (len, 1) == 0) | |
9342ee68 | 2295 | { |
2296 | /* Evaluate and ignore SRC in case it has side-effects. */ | |
2297 | expand_expr (src, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2298 | return expand_expr (dest, target, mode, EXPAND_NORMAL); | |
2299 | } | |
6f428e8b | 2300 | |
2301 | /* If either SRC is not a pointer type, don't do this | |
2302 | operation in-line. */ | |
2303 | if (src_align == 0) | |
9342ee68 | 2304 | return 0; |
53800dbe | 2305 | |
2306 | dest_mem = get_memory_rtx (dest); | |
2a631e19 | 2307 | set_mem_align (dest_mem, dest_align); |
53800dbe | 2308 | len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0); |
6840589f | 2309 | src_str = c_getstr (src); |
2310 | ||
2311 | /* If SRC is a string constant and block move would be done | |
2312 | by pieces, we can avoid loading the string from memory | |
2313 | and only stored the computed constants. */ | |
2314 | if (src_str | |
6840589f | 2315 | && GET_CODE (len_rtx) == CONST_INT |
2316 | && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1 | |
2317 | && can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str, | |
2318 | (PTR) src_str, dest_align)) | |
2319 | { | |
2320 | store_by_pieces (dest_mem, INTVAL (len_rtx), | |
2321 | builtin_memcpy_read_str, | |
2322 | (PTR) src_str, dest_align); | |
e5716f7e | 2323 | dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX); |
2324 | #ifdef POINTERS_EXTEND_UNSIGNED | |
2325 | if (GET_MODE (dest_mem) != ptr_mode) | |
2326 | dest_mem = convert_memory_address (ptr_mode, dest_mem); | |
2327 | #endif | |
3b824fa6 | 2328 | if (endp) |
2329 | { | |
83cdf34a | 2330 | rtx result = gen_rtx_PLUS (GET_MODE (dest_mem), dest_mem, len_rtx); |
3b824fa6 | 2331 | if (endp == 2) |
83cdf34a | 2332 | result = simplify_gen_binary (MINUS, GET_MODE (result), result, const1_rtx); |
3b824fa6 | 2333 | return result; |
2334 | } | |
2335 | else | |
2336 | return dest_mem; | |
6840589f | 2337 | } |
2338 | ||
2339 | src_mem = get_memory_rtx (src); | |
2a631e19 | 2340 | set_mem_align (src_mem, src_align); |
53800dbe | 2341 | |
53800dbe | 2342 | /* Copy word part most expediently. */ |
0378dbdc | 2343 | dest_addr = emit_block_move (dest_mem, src_mem, len_rtx, |
2344 | BLOCK_OP_NORMAL); | |
53800dbe | 2345 | |
2346 | if (dest_addr == 0) | |
e5716f7e | 2347 | { |
2348 | dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX); | |
2349 | #ifdef POINTERS_EXTEND_UNSIGNED | |
2350 | if (GET_MODE (dest_addr) != ptr_mode) | |
2351 | dest_addr = convert_memory_address (ptr_mode, dest_addr); | |
2352 | #endif | |
2353 | } | |
53800dbe | 2354 | |
3b824fa6 | 2355 | if (endp) |
2356 | { | |
2357 | rtx result = gen_rtx_PLUS (GET_MODE (dest_addr), dest_addr, len_rtx); | |
2358 | if (endp == 2) | |
83cdf34a | 2359 | result = simplify_gen_binary (MINUS, GET_MODE (result), result, const1_rtx); |
3b824fa6 | 2360 | return result; |
2361 | } | |
2362 | else | |
2363 | return dest_addr; | |
53800dbe | 2364 | } |
2365 | } | |
2366 | ||
2367 | /* Expand expression EXP, which is a call to the strcpy builtin. Return 0 | |
6f428e8b | 2368 | if we failed the caller should emit a normal call, otherwise try to get |
2369 | the result in TARGET, if convenient (and in mode MODE if that's | |
2370 | convenient). */ | |
902de8ed | 2371 | |
53800dbe | 2372 | static rtx |
6f428e8b | 2373 | expand_builtin_strcpy (exp, target, mode) |
53800dbe | 2374 | tree exp; |
6f428e8b | 2375 | rtx target; |
2376 | enum machine_mode mode; | |
53800dbe | 2377 | { |
2378 | tree arglist = TREE_OPERAND (exp, 1); | |
6f428e8b | 2379 | tree fn, len; |
53800dbe | 2380 | |
0eb671f7 | 2381 | if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
53800dbe | 2382 | return 0; |
53800dbe | 2383 | |
0a68165a | 2384 | fn = implicit_built_in_decls[BUILT_IN_MEMCPY]; |
6f428e8b | 2385 | if (!fn) |
2386 | return 0; | |
902de8ed | 2387 | |
6f428e8b | 2388 | len = c_strlen (TREE_VALUE (TREE_CHAIN (arglist))); |
2389 | if (len == 0) | |
2390 | return 0; | |
902de8ed | 2391 | |
6f428e8b | 2392 | len = size_binop (PLUS_EXPR, len, ssize_int (1)); |
2393 | chainon (arglist, build_tree_list (NULL_TREE, len)); | |
2394 | return expand_expr (build_function_call_expr (fn, arglist), | |
9342ee68 | 2395 | target, mode, EXPAND_NORMAL); |
53800dbe | 2396 | } |
2397 | ||
3b824fa6 | 2398 | /* Expand a call to the stpcpy builtin, with arguments in ARGLIST. |
2399 | Return 0 if we failed the caller should emit a normal call, | |
2400 | otherwise try to get the result in TARGET, if convenient (and in | |
2401 | mode MODE if that's convenient). */ | |
2402 | ||
2403 | static rtx | |
2404 | expand_builtin_stpcpy (arglist, target, mode) | |
2405 | tree arglist; | |
2406 | rtx target; | |
2407 | enum machine_mode mode; | |
2408 | { | |
2409 | if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) | |
2410 | return 0; | |
2411 | else | |
2412 | { | |
2413 | tree len = c_strlen (TREE_VALUE (TREE_CHAIN (arglist))); | |
2414 | if (len == 0) | |
2415 | return 0; | |
2416 | ||
2417 | len = fold (size_binop (PLUS_EXPR, len, ssize_int (1))); | |
2418 | chainon (arglist, build_tree_list (NULL_TREE, len)); | |
2419 | return expand_builtin_memcpy (arglist, target, mode, /*endp=*/2); | |
2420 | } | |
2421 | } | |
2422 | ||
6840589f | 2423 | /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE) |
2424 | bytes from constant string DATA + OFFSET and return it as target | |
2425 | constant. */ | |
2426 | ||
2427 | static rtx | |
2428 | builtin_strncpy_read_str (data, offset, mode) | |
2429 | PTR data; | |
2430 | HOST_WIDE_INT offset; | |
2431 | enum machine_mode mode; | |
2432 | { | |
2433 | const char *str = (const char *) data; | |
2434 | ||
2435 | if ((unsigned HOST_WIDE_INT) offset > strlen (str)) | |
2436 | return const0_rtx; | |
2437 | ||
2438 | return c_readstr (str + offset, mode); | |
2439 | } | |
2440 | ||
ed09096d | 2441 | /* Expand expression EXP, which is a call to the strncpy builtin. Return 0 |
2442 | if we failed the caller should emit a normal call. */ | |
2443 | ||
2444 | static rtx | |
2445 | expand_builtin_strncpy (arglist, target, mode) | |
2446 | tree arglist; | |
2447 | rtx target; | |
2448 | enum machine_mode mode; | |
2449 | { | |
0eb671f7 | 2450 | if (!validate_arglist (arglist, |
2451 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
ed09096d | 2452 | return 0; |
2453 | else | |
2454 | { | |
2455 | tree slen = c_strlen (TREE_VALUE (TREE_CHAIN (arglist))); | |
2456 | tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
6f428e8b | 2457 | tree fn; |
ed09096d | 2458 | |
2459 | /* We must be passed a constant len parameter. */ | |
2460 | if (TREE_CODE (len) != INTEGER_CST) | |
2461 | return 0; | |
2462 | ||
2463 | /* If the len parameter is zero, return the dst parameter. */ | |
df5c389e | 2464 | if (integer_zerop (len)) |
9342ee68 | 2465 | { |
2466 | /* Evaluate and ignore the src argument in case it has | |
2467 | side-effects. */ | |
ed09096d | 2468 | expand_expr (TREE_VALUE (TREE_CHAIN (arglist)), const0_rtx, |
2469 | VOIDmode, EXPAND_NORMAL); | |
bf8e3599 | 2470 | /* Return the dst parameter. */ |
ed09096d | 2471 | return expand_expr (TREE_VALUE (arglist), target, mode, |
2472 | EXPAND_NORMAL); | |
2473 | } | |
6840589f | 2474 | |
ed09096d | 2475 | /* Now, we must be passed a constant src ptr parameter. */ |
6840589f | 2476 | if (slen == 0 || TREE_CODE (slen) != INTEGER_CST) |
ed09096d | 2477 | return 0; |
2478 | ||
2479 | slen = size_binop (PLUS_EXPR, slen, ssize_int (1)); | |
2480 | ||
2481 | /* We're required to pad with trailing zeros if the requested | |
6840589f | 2482 | len is greater than strlen(s2)+1. In that case try to |
2483 | use store_by_pieces, if it fails, punt. */ | |
ed09096d | 2484 | if (tree_int_cst_lt (slen, len)) |
6840589f | 2485 | { |
2486 | tree dest = TREE_VALUE (arglist); | |
27d0c333 | 2487 | unsigned int dest_align |
2488 | = get_pointer_alignment (dest, BIGGEST_ALIGNMENT); | |
6840589f | 2489 | const char *p = c_getstr (TREE_VALUE (TREE_CHAIN (arglist))); |
2490 | rtx dest_mem; | |
2491 | ||
27d0c333 | 2492 | if (!p || dest_align == 0 || !host_integerp (len, 1) |
2493 | || !can_store_by_pieces (tree_low_cst (len, 1), | |
6840589f | 2494 | builtin_strncpy_read_str, |
2495 | (PTR) p, dest_align)) | |
2496 | return 0; | |
2497 | ||
2498 | dest_mem = get_memory_rtx (dest); | |
27d0c333 | 2499 | store_by_pieces (dest_mem, tree_low_cst (len, 1), |
6840589f | 2500 | builtin_strncpy_read_str, |
2501 | (PTR) p, dest_align); | |
e5716f7e | 2502 | dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX); |
2503 | #ifdef POINTERS_EXTEND_UNSIGNED | |
2504 | if (GET_MODE (dest_mem) != ptr_mode) | |
2505 | dest_mem = convert_memory_address (ptr_mode, dest_mem); | |
2506 | #endif | |
2507 | return dest_mem; | |
6840589f | 2508 | } |
bf8e3599 | 2509 | |
ed09096d | 2510 | /* OK transform into builtin memcpy. */ |
0a68165a | 2511 | fn = implicit_built_in_decls[BUILT_IN_MEMCPY]; |
6f428e8b | 2512 | if (!fn) |
9342ee68 | 2513 | return 0; |
6f428e8b | 2514 | return expand_expr (build_function_call_expr (fn, arglist), |
9342ee68 | 2515 | target, mode, EXPAND_NORMAL); |
ed09096d | 2516 | } |
2517 | } | |
2518 | ||
ecc318ff | 2519 | /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE) |
2520 | bytes from constant string DATA + OFFSET and return it as target | |
2521 | constant. */ | |
2522 | ||
2523 | static rtx | |
2524 | builtin_memset_read_str (data, offset, mode) | |
2525 | PTR data; | |
2526 | HOST_WIDE_INT offset ATTRIBUTE_UNUSED; | |
2527 | enum machine_mode mode; | |
2528 | { | |
2529 | const char *c = (const char *) data; | |
2530 | char *p = alloca (GET_MODE_SIZE (mode)); | |
2531 | ||
2532 | memset (p, *c, GET_MODE_SIZE (mode)); | |
2533 | ||
2534 | return c_readstr (p, mode); | |
2535 | } | |
2536 | ||
a7ec6974 | 2537 | /* Callback routine for store_by_pieces. Return the RTL of a register |
2538 | containing GET_MODE_SIZE (MODE) consecutive copies of the unsigned | |
2539 | char value given in the RTL register data. For example, if mode is | |
2540 | 4 bytes wide, return the RTL for 0x01010101*data. */ | |
2541 | ||
2542 | static rtx | |
2543 | builtin_memset_gen_str (data, offset, mode) | |
2544 | PTR data; | |
2545 | HOST_WIDE_INT offset ATTRIBUTE_UNUSED; | |
2546 | enum machine_mode mode; | |
2547 | { | |
2548 | rtx target, coeff; | |
2549 | size_t size; | |
2550 | char *p; | |
2551 | ||
2552 | size = GET_MODE_SIZE (mode); | |
f0ce3b1f | 2553 | if (size == 1) |
2554 | return (rtx) data; | |
a7ec6974 | 2555 | |
2556 | p = alloca (size); | |
2557 | memset (p, 1, size); | |
2558 | coeff = c_readstr (p, mode); | |
2559 | ||
f0ce3b1f | 2560 | target = convert_to_mode (mode, (rtx) data, 1); |
a7ec6974 | 2561 | target = expand_mult (mode, target, coeff, NULL_RTX, 1); |
2562 | return force_reg (mode, target); | |
2563 | } | |
2564 | ||
53800dbe | 2565 | /* Expand expression EXP, which is a call to the memset builtin. Return 0 |
6f428e8b | 2566 | if we failed the caller should emit a normal call, otherwise try to get |
2567 | the result in TARGET, if convenient (and in mode MODE if that's | |
2568 | convenient). */ | |
902de8ed | 2569 | |
53800dbe | 2570 | static rtx |
6f428e8b | 2571 | expand_builtin_memset (exp, target, mode) |
53800dbe | 2572 | tree exp; |
6f428e8b | 2573 | rtx target; |
2574 | enum machine_mode mode; | |
53800dbe | 2575 | { |
2576 | tree arglist = TREE_OPERAND (exp, 1); | |
2577 | ||
0eb671f7 | 2578 | if (!validate_arglist (arglist, |
2579 | POINTER_TYPE, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
53800dbe | 2580 | return 0; |
2581 | else | |
2582 | { | |
2583 | tree dest = TREE_VALUE (arglist); | |
2584 | tree val = TREE_VALUE (TREE_CHAIN (arglist)); | |
2585 | tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
ecc318ff | 2586 | char c; |
53800dbe | 2587 | |
27d0c333 | 2588 | unsigned int dest_align |
2589 | = get_pointer_alignment (dest, BIGGEST_ALIGNMENT); | |
53800dbe | 2590 | rtx dest_mem, dest_addr, len_rtx; |
2591 | ||
bf8e3599 | 2592 | /* If DEST is not a pointer type, don't do this |
53800dbe | 2593 | operation in-line. */ |
2594 | if (dest_align == 0) | |
2595 | return 0; | |
2596 | ||
6f428e8b | 2597 | /* If the LEN parameter is zero, return DEST. */ |
2598 | if (host_integerp (len, 1) && tree_low_cst (len, 1) == 0) | |
9342ee68 | 2599 | { |
2600 | /* Evaluate and ignore VAL in case it has side-effects. */ | |
2601 | expand_expr (val, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2602 | return expand_expr (dest, target, mode, EXPAND_NORMAL); | |
2603 | } | |
6f428e8b | 2604 | |
ecc318ff | 2605 | if (TREE_CODE (val) != INTEGER_CST) |
9342ee68 | 2606 | { |
2607 | rtx val_rtx; | |
a7ec6974 | 2608 | |
9342ee68 | 2609 | if (!host_integerp (len, 1)) |
2610 | return 0; | |
a7ec6974 | 2611 | |
9342ee68 | 2612 | if (optimize_size && tree_low_cst (len, 1) > 1) |
2613 | return 0; | |
a7ec6974 | 2614 | |
9342ee68 | 2615 | /* Assume that we can memset by pieces if we can store the |
2616 | * the coefficients by pieces (in the required modes). | |
2617 | * We can't pass builtin_memset_gen_str as that emits RTL. */ | |
2618 | c = 1; | |
a7ec6974 | 2619 | if (!can_store_by_pieces (tree_low_cst (len, 1), |
2620 | builtin_memset_read_str, | |
9342ee68 | 2621 | (PTR) &c, dest_align)) |
a7ec6974 | 2622 | return 0; |
2623 | ||
9342ee68 | 2624 | val = fold (build1 (CONVERT_EXPR, unsigned_char_type_node, val)); |
2625 | val_rtx = expand_expr (val, NULL_RTX, VOIDmode, 0); | |
2626 | val_rtx = force_reg (TYPE_MODE (unsigned_char_type_node), | |
2627 | val_rtx); | |
a7ec6974 | 2628 | dest_mem = get_memory_rtx (dest); |
2629 | store_by_pieces (dest_mem, tree_low_cst (len, 1), | |
2630 | builtin_memset_gen_str, | |
f0ce3b1f | 2631 | (PTR) val_rtx, dest_align); |
e5716f7e | 2632 | dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX); |
2633 | #ifdef POINTERS_EXTEND_UNSIGNED | |
2634 | if (GET_MODE (dest_mem) != ptr_mode) | |
2635 | dest_mem = convert_memory_address (ptr_mode, dest_mem); | |
2636 | #endif | |
2637 | return dest_mem; | |
9342ee68 | 2638 | } |
53800dbe | 2639 | |
ecc318ff | 2640 | if (target_char_cast (val, &c)) |
53800dbe | 2641 | return 0; |
2642 | ||
ecc318ff | 2643 | if (c) |
2644 | { | |
27d0c333 | 2645 | if (!host_integerp (len, 1)) |
ecc318ff | 2646 | return 0; |
8a06f2d4 | 2647 | if (!can_store_by_pieces (tree_low_cst (len, 1), |
2648 | builtin_memset_read_str, (PTR) &c, | |
2649 | dest_align)) | |
ecc318ff | 2650 | return 0; |
2651 | ||
2652 | dest_mem = get_memory_rtx (dest); | |
27d0c333 | 2653 | store_by_pieces (dest_mem, tree_low_cst (len, 1), |
ecc318ff | 2654 | builtin_memset_read_str, |
2655 | (PTR) &c, dest_align); | |
e5716f7e | 2656 | dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX); |
2657 | #ifdef POINTERS_EXTEND_UNSIGNED | |
2658 | if (GET_MODE (dest_mem) != ptr_mode) | |
2659 | dest_mem = convert_memory_address (ptr_mode, dest_mem); | |
2660 | #endif | |
2661 | return dest_mem; | |
ecc318ff | 2662 | } |
2663 | ||
53800dbe | 2664 | len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0); |
53800dbe | 2665 | |
2666 | dest_mem = get_memory_rtx (dest); | |
2a631e19 | 2667 | set_mem_align (dest_mem, dest_align); |
2a631e19 | 2668 | dest_addr = clear_storage (dest_mem, len_rtx); |
53800dbe | 2669 | |
2670 | if (dest_addr == 0) | |
e5716f7e | 2671 | { |
2672 | dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX); | |
2673 | #ifdef POINTERS_EXTEND_UNSIGNED | |
2674 | if (GET_MODE (dest_addr) != ptr_mode) | |
2675 | dest_addr = convert_memory_address (ptr_mode, dest_addr); | |
2676 | #endif | |
2677 | } | |
53800dbe | 2678 | |
2679 | return dest_addr; | |
2680 | } | |
2681 | } | |
2682 | ||
ffc83088 | 2683 | /* Expand expression EXP, which is a call to the bzero builtin. Return 0 |
2684 | if we failed the caller should emit a normal call. */ | |
27d0c333 | 2685 | |
ffc83088 | 2686 | static rtx |
2687 | expand_builtin_bzero (exp) | |
2688 | tree exp; | |
2689 | { | |
2690 | tree arglist = TREE_OPERAND (exp, 1); | |
7369e7ba | 2691 | tree dest, size, newarglist; |
2692 | rtx result; | |
ffc83088 | 2693 | |
0eb671f7 | 2694 | if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
7369e7ba | 2695 | return NULL_RTX; |
ffc83088 | 2696 | |
0eb671f7 | 2697 | dest = TREE_VALUE (arglist); |
2698 | size = TREE_VALUE (TREE_CHAIN (arglist)); | |
bf8e3599 | 2699 | |
7369e7ba | 2700 | /* New argument list transforming bzero(ptr x, int y) to |
6f428e8b | 2701 | memset(ptr x, int 0, size_t y). This is done this way |
2702 | so that if it isn't expanded inline, we fallback to | |
2703 | calling bzero instead of memset. */ | |
bf8e3599 | 2704 | |
7369e7ba | 2705 | newarglist = build_tree_list (NULL_TREE, convert (sizetype, size)); |
2706 | newarglist = tree_cons (NULL_TREE, integer_zero_node, newarglist); | |
2707 | newarglist = tree_cons (NULL_TREE, dest, newarglist); | |
ffc83088 | 2708 | |
7369e7ba | 2709 | TREE_OPERAND (exp, 1) = newarglist; |
6f428e8b | 2710 | result = expand_builtin_memset (exp, const0_rtx, VOIDmode); |
bf8e3599 | 2711 | |
7369e7ba | 2712 | /* Always restore the original arguments. */ |
2713 | TREE_OPERAND (exp, 1) = arglist; | |
ffc83088 | 2714 | |
7369e7ba | 2715 | return result; |
ffc83088 | 2716 | } |
2717 | ||
53800dbe | 2718 | /* Expand expression EXP, which is a call to the memcmp or the strcmp builtin. |
2719 | ARGLIST is the argument list for this call. Return 0 if we failed and the | |
2720 | caller should emit a normal call, otherwise try to get the result in | |
6f428e8b | 2721 | TARGET, if convenient (and in mode MODE, if that's convenient). */ |
27d0c333 | 2722 | |
53800dbe | 2723 | static rtx |
6f428e8b | 2724 | expand_builtin_memcmp (exp, arglist, target, mode) |
7cc1628d | 2725 | tree exp ATTRIBUTE_UNUSED; |
53800dbe | 2726 | tree arglist; |
2727 | rtx target; | |
6f428e8b | 2728 | enum machine_mode mode; |
53800dbe | 2729 | { |
6f428e8b | 2730 | tree arg1, arg2, len; |
d470d782 | 2731 | const char *p1, *p2; |
6f428e8b | 2732 | |
0eb671f7 | 2733 | if (!validate_arglist (arglist, |
9342ee68 | 2734 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
53800dbe | 2735 | return 0; |
53800dbe | 2736 | |
6f428e8b | 2737 | arg1 = TREE_VALUE (arglist); |
2738 | arg2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
2739 | len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
2740 | ||
2741 | /* If the len parameter is zero, return zero. */ | |
2742 | if (host_integerp (len, 1) && tree_low_cst (len, 1) == 0) | |
2743 | { | |
2744 | /* Evaluate and ignore arg1 and arg2 in case they have | |
2745 | side-effects. */ | |
2746 | expand_expr (arg1, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2747 | expand_expr (arg2, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2748 | return const0_rtx; | |
2749 | } | |
2750 | ||
d470d782 | 2751 | p1 = c_getstr (arg1); |
2752 | p2 = c_getstr (arg2); | |
2753 | ||
2754 | /* If all arguments are constant, and the value of len is not greater | |
2755 | than the lengths of arg1 and arg2, evaluate at compile-time. */ | |
2756 | if (host_integerp (len, 1) && p1 && p2 | |
df5c389e | 2757 | && compare_tree_int (len, strlen (p1) + 1) <= 0 |
2758 | && compare_tree_int (len, strlen (p2) + 1) <= 0) | |
d470d782 | 2759 | { |
2760 | const int r = memcmp (p1, p2, tree_low_cst (len, 1)); | |
df5c389e | 2761 | |
d470d782 | 2762 | return (r < 0 ? constm1_rtx : (r > 0 ? const1_rtx : const0_rtx)); |
2763 | } | |
2764 | ||
6f428e8b | 2765 | /* If len parameter is one, return an expression corresponding to |
2766 | (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */ | |
2767 | if (host_integerp (len, 1) && tree_low_cst (len, 1) == 1) | |
2768 | { | |
2769 | tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0); | |
2770 | tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node); | |
2771 | tree ind1 = | |
2772 | fold (build1 (CONVERT_EXPR, integer_type_node, | |
9342ee68 | 2773 | build1 (INDIRECT_REF, cst_uchar_node, |
2774 | build1 (NOP_EXPR, cst_uchar_ptr_node, arg1)))); | |
6f428e8b | 2775 | tree ind2 = |
2776 | fold (build1 (CONVERT_EXPR, integer_type_node, | |
9342ee68 | 2777 | build1 (INDIRECT_REF, cst_uchar_node, |
2778 | build1 (NOP_EXPR, cst_uchar_ptr_node, arg2)))); | |
6f428e8b | 2779 | tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2)); |
2780 | return expand_expr (result, target, mode, EXPAND_NORMAL); | |
2781 | } | |
2782 | ||
2783 | #ifdef HAVE_cmpstrsi | |
53800dbe | 2784 | { |
0cd832f0 | 2785 | rtx arg1_rtx, arg2_rtx, arg3_rtx; |
53800dbe | 2786 | rtx result; |
0cd832f0 | 2787 | rtx insn; |
53800dbe | 2788 | |
2789 | int arg1_align | |
2790 | = get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
2791 | int arg2_align | |
2792 | = get_pointer_alignment (arg2, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
2793 | enum machine_mode insn_mode | |
6357eaae | 2794 | = insn_data[(int) CODE_FOR_cmpstrsi].operand[0].mode; |
53800dbe | 2795 | |
2796 | /* If we don't have POINTER_TYPE, call the function. */ | |
2797 | if (arg1_align == 0 || arg2_align == 0) | |
2798 | return 0; | |
2799 | ||
2800 | /* Make a place to write the result of the instruction. */ | |
2801 | result = target; | |
2802 | if (! (result != 0 | |
2803 | && GET_CODE (result) == REG && GET_MODE (result) == insn_mode | |
2804 | && REGNO (result) >= FIRST_PSEUDO_REGISTER)) | |
2805 | result = gen_reg_rtx (insn_mode); | |
2806 | ||
0cd832f0 | 2807 | arg1_rtx = get_memory_rtx (arg1); |
2808 | arg2_rtx = get_memory_rtx (arg2); | |
2809 | arg3_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0); | |
2810 | if (!HAVE_cmpstrsi) | |
2811 | insn = NULL_RTX; | |
2812 | else | |
2813 | insn = gen_cmpstrsi (result, arg1_rtx, arg2_rtx, arg3_rtx, | |
2814 | GEN_INT (MIN (arg1_align, arg2_align))); | |
2815 | ||
2816 | if (insn) | |
2817 | emit_insn (insn); | |
2818 | else | |
2c5d421b | 2819 | emit_library_call_value (memcmp_libfunc, result, LCT_PURE_MAKE_BLOCK, |
0cd832f0 | 2820 | TYPE_MODE (integer_type_node), 3, |
2821 | XEXP (arg1_rtx, 0), Pmode, | |
2822 | XEXP (arg2_rtx, 0), Pmode, | |
2823 | convert_to_mode (TYPE_MODE (sizetype), arg3_rtx, | |
2824 | TREE_UNSIGNED (sizetype)), | |
2825 | TYPE_MODE (sizetype)); | |
53800dbe | 2826 | |
2827 | /* Return the value in the proper mode for this function. */ | |
2828 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
2829 | if (GET_MODE (result) == mode) | |
2830 | return result; | |
2831 | else if (target != 0) | |
2832 | { | |
2833 | convert_move (target, result, 0); | |
2834 | return target; | |
2835 | } | |
2836 | else | |
2837 | return convert_to_mode (mode, result, 0); | |
2838 | } | |
83d79705 | 2839 | #endif |
53800dbe | 2840 | |
6f428e8b | 2841 | return 0; |
2842 | } | |
2843 | ||
53800dbe | 2844 | /* Expand expression EXP, which is a call to the strcmp builtin. Return 0 |
2845 | if we failed the caller should emit a normal call, otherwise try to get | |
2846 | the result in TARGET, if convenient. */ | |
902de8ed | 2847 | |
53800dbe | 2848 | static rtx |
83d79705 | 2849 | expand_builtin_strcmp (exp, target, mode) |
53800dbe | 2850 | tree exp; |
2851 | rtx target; | |
83d79705 | 2852 | enum machine_mode mode; |
53800dbe | 2853 | { |
2854 | tree arglist = TREE_OPERAND (exp, 1); | |
6f428e8b | 2855 | tree arg1, arg2, len, len2, fn; |
83d79705 | 2856 | const char *p1, *p2; |
53800dbe | 2857 | |
0eb671f7 | 2858 | if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
53800dbe | 2859 | return 0; |
902de8ed | 2860 | |
83d79705 | 2861 | arg1 = TREE_VALUE (arglist); |
2862 | arg2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
2863 | ||
2864 | p1 = c_getstr (arg1); | |
2865 | p2 = c_getstr (arg2); | |
2866 | ||
2867 | if (p1 && p2) | |
2868 | { | |
ef6c187e | 2869 | const int i = strcmp (p1, p2); |
2870 | return (i < 0 ? constm1_rtx : (i > 0 ? const1_rtx : const0_rtx)); | |
83d79705 | 2871 | } |
2872 | ||
ef6c187e | 2873 | /* If either arg is "", return an expression corresponding to |
2874 | (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */ | |
2875 | if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0')) | |
2876 | { | |
2877 | tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0); | |
2878 | tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node); | |
2879 | tree ind1 = | |
2880 | fold (build1 (CONVERT_EXPR, integer_type_node, | |
2881 | build1 (INDIRECT_REF, cst_uchar_node, | |
2882 | build1 (NOP_EXPR, cst_uchar_ptr_node, arg1)))); | |
2883 | tree ind2 = | |
2884 | fold (build1 (CONVERT_EXPR, integer_type_node, | |
2885 | build1 (INDIRECT_REF, cst_uchar_node, | |
2886 | build1 (NOP_EXPR, cst_uchar_ptr_node, arg2)))); | |
2887 | tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2)); | |
2888 | return expand_expr (result, target, mode, EXPAND_NORMAL); | |
2889 | } | |
bf8e3599 | 2890 | |
6f428e8b | 2891 | len = c_strlen (arg1); |
2892 | len2 = c_strlen (arg2); | |
902de8ed | 2893 | |
6f428e8b | 2894 | if (len) |
2895 | len = size_binop (PLUS_EXPR, ssize_int (1), len); | |
902de8ed | 2896 | |
6f428e8b | 2897 | if (len2) |
2898 | len2 = size_binop (PLUS_EXPR, ssize_int (1), len2); | |
53800dbe | 2899 | |
6f428e8b | 2900 | /* If we don't have a constant length for the first, use the length |
2901 | of the second, if we know it. We don't require a constant for | |
2902 | this case; some cost analysis could be done if both are available | |
2903 | but neither is constant. For now, assume they're equally cheap | |
2904 | unless one has side effects. | |
53800dbe | 2905 | |
6f428e8b | 2906 | If both strings have constant lengths, use the smaller. This |
2907 | could arise if optimization results in strcpy being called with | |
2908 | two fixed strings, or if the code was machine-generated. We should | |
2909 | add some code to the `memcmp' handler below to deal with such | |
2910 | situations, someday. */ | |
902de8ed | 2911 | |
6f428e8b | 2912 | if (!len || TREE_CODE (len) != INTEGER_CST) |
2913 | { | |
2914 | if (len2 && !TREE_SIDE_EFFECTS (len2)) | |
9342ee68 | 2915 | len = len2; |
6f428e8b | 2916 | else if (len == 0) |
9342ee68 | 2917 | return 0; |
6f428e8b | 2918 | } |
2919 | else if (len2 && TREE_CODE (len2) == INTEGER_CST | |
9342ee68 | 2920 | && tree_int_cst_lt (len2, len)) |
6f428e8b | 2921 | len = len2; |
53800dbe | 2922 | |
6f428e8b | 2923 | /* If both arguments have side effects, we cannot optimize. */ |
2924 | if (TREE_SIDE_EFFECTS (len)) | |
2925 | return 0; | |
6840589f | 2926 | |
0a68165a | 2927 | fn = implicit_built_in_decls[BUILT_IN_MEMCMP]; |
6f428e8b | 2928 | if (!fn) |
2929 | return 0; | |
902de8ed | 2930 | |
6f428e8b | 2931 | chainon (arglist, build_tree_list (NULL_TREE, len)); |
2932 | return expand_expr (build_function_call_expr (fn, arglist), | |
9342ee68 | 2933 | target, mode, EXPAND_NORMAL); |
83d79705 | 2934 | } |
53800dbe | 2935 | |
ed09096d | 2936 | /* Expand expression EXP, which is a call to the strncmp builtin. Return 0 |
2937 | if we failed the caller should emit a normal call, otherwise try to get | |
2938 | the result in TARGET, if convenient. */ | |
27d0c333 | 2939 | |
ed09096d | 2940 | static rtx |
2941 | expand_builtin_strncmp (exp, target, mode) | |
2942 | tree exp; | |
2943 | rtx target; | |
2944 | enum machine_mode mode; | |
2945 | { | |
2946 | tree arglist = TREE_OPERAND (exp, 1); | |
6f428e8b | 2947 | tree fn, newarglist, len = 0; |
ed09096d | 2948 | tree arg1, arg2, arg3; |
2949 | const char *p1, *p2; | |
2950 | ||
0eb671f7 | 2951 | if (!validate_arglist (arglist, |
2952 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
ed09096d | 2953 | return 0; |
2954 | ||
2955 | arg1 = TREE_VALUE (arglist); | |
2956 | arg2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
2957 | arg3 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
2958 | ||
ed09096d | 2959 | /* If the len parameter is zero, return zero. */ |
6e34e617 | 2960 | if (host_integerp (arg3, 1) && tree_low_cst (arg3, 1) == 0) |
9342ee68 | 2961 | { |
2962 | /* Evaluate and ignore arg1 and arg2 in case they have | |
2963 | side-effects. */ | |
2964 | expand_expr (arg1, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2965 | expand_expr (arg2, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2966 | return const0_rtx; | |
2967 | } | |
ed09096d | 2968 | |
2969 | p1 = c_getstr (arg1); | |
2970 | p2 = c_getstr (arg2); | |
2971 | ||
2972 | /* If all arguments are constant, evaluate at compile-time. */ | |
6e34e617 | 2973 | if (host_integerp (arg3, 1) && p1 && p2) |
9342ee68 | 2974 | { |
2975 | const int r = strncmp (p1, p2, tree_low_cst (arg3, 1)); | |
2976 | return (r < 0 ? constm1_rtx : (r > 0 ? const1_rtx : const0_rtx)); | |
2977 | } | |
ed09096d | 2978 | |
ef6c187e | 2979 | /* If len == 1 or (either string parameter is "" and (len >= 1)), |
6e34e617 | 2980 | return (*(const u_char*)arg1 - *(const u_char*)arg2). */ |
2981 | if (host_integerp (arg3, 1) | |
2982 | && (tree_low_cst (arg3, 1) == 1 | |
2983 | || (tree_low_cst (arg3, 1) > 1 | |
2984 | && ((p1 && *p1 == '\0') || (p2 && *p2 == '\0'))))) | |
ef6c187e | 2985 | { |
2986 | tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0); | |
2987 | tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node); | |
2988 | tree ind1 = | |
2989 | fold (build1 (CONVERT_EXPR, integer_type_node, | |
2990 | build1 (INDIRECT_REF, cst_uchar_node, | |
2991 | build1 (NOP_EXPR, cst_uchar_ptr_node, arg1)))); | |
2992 | tree ind2 = | |
2993 | fold (build1 (CONVERT_EXPR, integer_type_node, | |
2994 | build1 (INDIRECT_REF, cst_uchar_node, | |
2995 | build1 (NOP_EXPR, cst_uchar_ptr_node, arg2)))); | |
2996 | tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2)); | |
2997 | return expand_expr (result, target, mode, EXPAND_NORMAL); | |
2998 | } | |
ed09096d | 2999 | |
6e34e617 | 3000 | /* If c_strlen can determine an expression for one of the string |
3001 | lengths, and it doesn't have side effects, then call | |
3002 | expand_builtin_memcmp() using length MIN(strlen(string)+1, arg3). */ | |
bf8e3599 | 3003 | |
6f428e8b | 3004 | /* Perhaps one of the strings is really constant, if so prefer |
3005 | that constant length over the other string's length. */ | |
3006 | if (p1) | |
3007 | len = c_strlen (arg1); | |
3008 | else if (p2) | |
3009 | len = c_strlen (arg2); | |
3010 | ||
3011 | /* If we still don't have a len, try either string arg as long | |
3012 | as they don't have side effects. */ | |
3013 | if (!len && !TREE_SIDE_EFFECTS (arg1)) | |
3014 | len = c_strlen (arg1); | |
3015 | if (!len && !TREE_SIDE_EFFECTS (arg2)) | |
3016 | len = c_strlen (arg2); | |
3017 | /* If we still don't have a length, punt. */ | |
3018 | if (!len) | |
3019 | return 0; | |
3020 | ||
0a68165a | 3021 | fn = implicit_built_in_decls[BUILT_IN_MEMCMP]; |
6f428e8b | 3022 | if (!fn) |
3023 | return 0; | |
bf8e3599 | 3024 | |
6f428e8b | 3025 | /* Add one to the string length. */ |
3026 | len = fold (size_binop (PLUS_EXPR, len, ssize_int (1))); | |
6e34e617 | 3027 | |
6f428e8b | 3028 | /* The actual new length parameter is MIN(len,arg3). */ |
3029 | len = fold (build (MIN_EXPR, TREE_TYPE (len), len, arg3)); | |
bf8e3599 | 3030 | |
6f428e8b | 3031 | newarglist = build_tree_list (NULL_TREE, len); |
3032 | newarglist = tree_cons (NULL_TREE, arg2, newarglist); | |
3033 | newarglist = tree_cons (NULL_TREE, arg1, newarglist); | |
3034 | return expand_expr (build_function_call_expr (fn, newarglist), | |
9342ee68 | 3035 | target, mode, EXPAND_NORMAL); |
ed09096d | 3036 | } |
3037 | ||
49f0327b | 3038 | /* Expand expression EXP, which is a call to the strcat builtin. |
3039 | Return 0 if we failed the caller should emit a normal call, | |
3040 | otherwise try to get the result in TARGET, if convenient. */ | |
27d0c333 | 3041 | |
49f0327b | 3042 | static rtx |
3043 | expand_builtin_strcat (arglist, target, mode) | |
3044 | tree arglist; | |
3045 | rtx target; | |
3046 | enum machine_mode mode; | |
3047 | { | |
0eb671f7 | 3048 | if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
49f0327b | 3049 | return 0; |
3050 | else | |
3051 | { | |
3052 | tree dst = TREE_VALUE (arglist), | |
3053 | src = TREE_VALUE (TREE_CHAIN (arglist)); | |
3054 | const char *p = c_getstr (src); | |
3055 | ||
3056 | /* If the string length is zero, return the dst parameter. */ | |
3057 | if (p && *p == '\0') | |
3058 | return expand_expr (dst, target, mode, EXPAND_NORMAL); | |
3059 | ||
3060 | return 0; | |
3061 | } | |
3062 | } | |
3063 | ||
3064 | /* Expand expression EXP, which is a call to the strncat builtin. | |
3065 | Return 0 if we failed the caller should emit a normal call, | |
3066 | otherwise try to get the result in TARGET, if convenient. */ | |
27d0c333 | 3067 | |
49f0327b | 3068 | static rtx |
3069 | expand_builtin_strncat (arglist, target, mode) | |
3070 | tree arglist; | |
3071 | rtx target; | |
3072 | enum machine_mode mode; | |
3073 | { | |
0eb671f7 | 3074 | if (!validate_arglist (arglist, |
3075 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
49f0327b | 3076 | return 0; |
3077 | else | |
3078 | { | |
3079 | tree dst = TREE_VALUE (arglist), | |
3080 | src = TREE_VALUE (TREE_CHAIN (arglist)), | |
3081 | len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
3082 | const char *p = c_getstr (src); | |
3083 | ||
3084 | /* If the requested length is zero, or the src parameter string | |
3085 | length is zero, return the dst parameter. */ | |
b527e67e | 3086 | if (integer_zerop (len) || (p && *p == '\0')) |
9342ee68 | 3087 | { |
49f0327b | 3088 | /* Evaluate and ignore the src and len parameters in case |
3089 | they have side-effects. */ | |
3090 | expand_expr (src, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3091 | expand_expr (len, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3092 | return expand_expr (dst, target, mode, EXPAND_NORMAL); | |
3093 | } | |
3094 | ||
3095 | /* If the requested len is greater than or equal to the string | |
3096 | length, call strcat. */ | |
3097 | if (TREE_CODE (len) == INTEGER_CST && p | |
3098 | && compare_tree_int (len, strlen (p)) >= 0) | |
9342ee68 | 3099 | { |
df5c389e | 3100 | tree newarglist |
3101 | = tree_cons (NULL_TREE, dst, build_tree_list (NULL_TREE, src)); | |
0a68165a | 3102 | tree fn = implicit_built_in_decls[BUILT_IN_STRCAT]; |
bf8e3599 | 3103 | |
49f0327b | 3104 | /* If the replacement _DECL isn't initialized, don't do the |
2c0e001b | 3105 | transformation. */ |
49f0327b | 3106 | if (!fn) |
3107 | return 0; | |
3108 | ||
7e15618b | 3109 | return expand_expr (build_function_call_expr (fn, newarglist), |
3110 | target, mode, EXPAND_NORMAL); | |
49f0327b | 3111 | } |
3112 | return 0; | |
3113 | } | |
3114 | } | |
3115 | ||
3116 | /* Expand expression EXP, which is a call to the strspn builtin. | |
3117 | Return 0 if we failed the caller should emit a normal call, | |
3118 | otherwise try to get the result in TARGET, if convenient. */ | |
27d0c333 | 3119 | |
49f0327b | 3120 | static rtx |
3121 | expand_builtin_strspn (arglist, target, mode) | |
3122 | tree arglist; | |
3123 | rtx target; | |
3124 | enum machine_mode mode; | |
3125 | { | |
0eb671f7 | 3126 | if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
49f0327b | 3127 | return 0; |
3128 | else | |
3129 | { | |
3130 | tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
3131 | const char *p1 = c_getstr (s1), *p2 = c_getstr (s2); | |
bf8e3599 | 3132 | |
49f0327b | 3133 | /* If both arguments are constants, evaluate at compile-time. */ |
3134 | if (p1 && p2) | |
9342ee68 | 3135 | { |
49f0327b | 3136 | const size_t r = strspn (p1, p2); |
3137 | return expand_expr (size_int (r), target, mode, EXPAND_NORMAL); | |
3138 | } | |
bf8e3599 | 3139 | |
fb1f44c5 | 3140 | /* If either argument is "", return 0. */ |
3141 | if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0')) | |
9342ee68 | 3142 | { |
fb1f44c5 | 3143 | /* Evaluate and ignore both arguments in case either one has |
49f0327b | 3144 | side-effects. */ |
3145 | expand_expr (s1, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
fb1f44c5 | 3146 | expand_expr (s2, const0_rtx, VOIDmode, EXPAND_NORMAL); |
49f0327b | 3147 | return const0_rtx; |
3148 | } | |
3149 | return 0; | |
3150 | } | |
3151 | } | |
3152 | ||
3153 | /* Expand expression EXP, which is a call to the strcspn builtin. | |
3154 | Return 0 if we failed the caller should emit a normal call, | |
3155 | otherwise try to get the result in TARGET, if convenient. */ | |
27d0c333 | 3156 | |
49f0327b | 3157 | static rtx |
3158 | expand_builtin_strcspn (arglist, target, mode) | |
3159 | tree arglist; | |
3160 | rtx target; | |
3161 | enum machine_mode mode; | |
3162 | { | |
0eb671f7 | 3163 | if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
49f0327b | 3164 | return 0; |
3165 | else | |
3166 | { | |
3167 | tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
3168 | const char *p1 = c_getstr (s1), *p2 = c_getstr (s2); | |
bf8e3599 | 3169 | |
49f0327b | 3170 | /* If both arguments are constants, evaluate at compile-time. */ |
3171 | if (p1 && p2) | |
9342ee68 | 3172 | { |
49f0327b | 3173 | const size_t r = strcspn (p1, p2); |
3174 | return expand_expr (size_int (r), target, mode, EXPAND_NORMAL); | |
3175 | } | |
bf8e3599 | 3176 | |
fb1f44c5 | 3177 | /* If the first argument is "", return 0. */ |
3178 | if (p1 && *p1 == '\0') | |
9342ee68 | 3179 | { |
fb1f44c5 | 3180 | /* Evaluate and ignore argument s2 in case it has |
3181 | side-effects. */ | |
3182 | expand_expr (s2, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3183 | return const0_rtx; | |
3184 | } | |
3185 | ||
49f0327b | 3186 | /* If the second argument is "", return __builtin_strlen(s1). */ |
3187 | if (p2 && *p2 == '\0') | |
9342ee68 | 3188 | { |
7e15618b | 3189 | tree newarglist = build_tree_list (NULL_TREE, s1), |
0a68165a | 3190 | fn = implicit_built_in_decls[BUILT_IN_STRLEN]; |
bf8e3599 | 3191 | |
49f0327b | 3192 | /* If the replacement _DECL isn't initialized, don't do the |
2c0e001b | 3193 | transformation. */ |
49f0327b | 3194 | if (!fn) |
3195 | return 0; | |
3196 | ||
7e15618b | 3197 | return expand_expr (build_function_call_expr (fn, newarglist), |
3198 | target, mode, EXPAND_NORMAL); | |
49f0327b | 3199 | } |
3200 | return 0; | |
3201 | } | |
3202 | } | |
3203 | ||
a66c9326 | 3204 | /* Expand a call to __builtin_saveregs, generating the result in TARGET, |
3205 | if that's convenient. */ | |
902de8ed | 3206 | |
a66c9326 | 3207 | rtx |
3208 | expand_builtin_saveregs () | |
53800dbe | 3209 | { |
a66c9326 | 3210 | rtx val, seq; |
53800dbe | 3211 | |
3212 | /* Don't do __builtin_saveregs more than once in a function. | |
3213 | Save the result of the first call and reuse it. */ | |
3214 | if (saveregs_value != 0) | |
3215 | return saveregs_value; | |
53800dbe | 3216 | |
a66c9326 | 3217 | /* When this function is called, it means that registers must be |
3218 | saved on entry to this function. So we migrate the call to the | |
3219 | first insn of this function. */ | |
3220 | ||
3221 | start_sequence (); | |
53800dbe | 3222 | |
3223 | #ifdef EXPAND_BUILTIN_SAVEREGS | |
a66c9326 | 3224 | /* Do whatever the machine needs done in this case. */ |
3225 | val = EXPAND_BUILTIN_SAVEREGS (); | |
53800dbe | 3226 | #else |
a66c9326 | 3227 | /* ??? We used to try and build up a call to the out of line function, |
3228 | guessing about what registers needed saving etc. This became much | |
3229 | harder with __builtin_va_start, since we don't have a tree for a | |
3230 | call to __builtin_saveregs to fall back on. There was exactly one | |
3231 | port (i860) that used this code, and I'm unconvinced it could actually | |
3232 | handle the general case. So we no longer try to handle anything | |
3233 | weird and make the backend absorb the evil. */ | |
3234 | ||
3235 | error ("__builtin_saveregs not supported by this target"); | |
3236 | val = const0_rtx; | |
53800dbe | 3237 | #endif |
3238 | ||
a66c9326 | 3239 | seq = get_insns (); |
3240 | end_sequence (); | |
53800dbe | 3241 | |
a66c9326 | 3242 | saveregs_value = val; |
53800dbe | 3243 | |
31d3e01c | 3244 | /* Put the insns after the NOTE that starts the function. If this |
3245 | is inside a start_sequence, make the outer-level insn chain current, so | |
a66c9326 | 3246 | the code is placed at the start of the function. */ |
3247 | push_topmost_sequence (); | |
31d3e01c | 3248 | emit_insn_after (seq, get_insns ()); |
a66c9326 | 3249 | pop_topmost_sequence (); |
3250 | ||
3251 | return val; | |
53800dbe | 3252 | } |
3253 | ||
3254 | /* __builtin_args_info (N) returns word N of the arg space info | |
3255 | for the current function. The number and meanings of words | |
3256 | is controlled by the definition of CUMULATIVE_ARGS. */ | |
f7c44134 | 3257 | |
53800dbe | 3258 | static rtx |
3259 | expand_builtin_args_info (exp) | |
3260 | tree exp; | |
3261 | { | |
3262 | tree arglist = TREE_OPERAND (exp, 1); | |
3263 | int nwords = sizeof (CUMULATIVE_ARGS) / sizeof (int); | |
3264 | int *word_ptr = (int *) ¤t_function_args_info; | |
53800dbe | 3265 | |
3266 | if (sizeof (CUMULATIVE_ARGS) % sizeof (int) != 0) | |
dda90815 | 3267 | abort (); |
53800dbe | 3268 | |
3269 | if (arglist != 0) | |
3270 | { | |
27d0c333 | 3271 | if (!host_integerp (TREE_VALUE (arglist), 0)) |
53800dbe | 3272 | error ("argument of `__builtin_args_info' must be constant"); |
3273 | else | |
3274 | { | |
27d0c333 | 3275 | HOST_WIDE_INT wordnum = tree_low_cst (TREE_VALUE (arglist), 0); |
53800dbe | 3276 | |
27d0c333 | 3277 | if (wordnum < 0 || wordnum >= nwords) |
53800dbe | 3278 | error ("argument of `__builtin_args_info' out of range"); |
3279 | else | |
3280 | return GEN_INT (word_ptr[wordnum]); | |
3281 | } | |
3282 | } | |
3283 | else | |
3284 | error ("missing argument in `__builtin_args_info'"); | |
3285 | ||
3286 | return const0_rtx; | |
53800dbe | 3287 | } |
3288 | ||
a66c9326 | 3289 | /* Expand ARGLIST, from a call to __builtin_next_arg. */ |
27d0c333 | 3290 | |
53800dbe | 3291 | static rtx |
a66c9326 | 3292 | expand_builtin_next_arg (arglist) |
3293 | tree arglist; | |
53800dbe | 3294 | { |
53800dbe | 3295 | tree fntype = TREE_TYPE (current_function_decl); |
3296 | ||
7ccc713a | 3297 | if (TYPE_ARG_TYPES (fntype) == 0 |
3298 | || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype))) | |
3299 | == void_type_node)) | |
53800dbe | 3300 | { |
3301 | error ("`va_start' used in function with fixed args"); | |
3302 | return const0_rtx; | |
3303 | } | |
3304 | ||
3305 | if (arglist) | |
3306 | { | |
3307 | tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl)); | |
3308 | tree arg = TREE_VALUE (arglist); | |
3309 | ||
3310 | /* Strip off all nops for the sake of the comparison. This | |
bf8e3599 | 3311 | is not quite the same as STRIP_NOPS. It does more. |
53800dbe | 3312 | We must also strip off INDIRECT_EXPR for C++ reference |
3313 | parameters. */ | |
3314 | while (TREE_CODE (arg) == NOP_EXPR | |
3315 | || TREE_CODE (arg) == CONVERT_EXPR | |
3316 | || TREE_CODE (arg) == NON_LVALUE_EXPR | |
3317 | || TREE_CODE (arg) == INDIRECT_REF) | |
3318 | arg = TREE_OPERAND (arg, 0); | |
3319 | if (arg != last_parm) | |
3320 | warning ("second parameter of `va_start' not last named argument"); | |
3321 | } | |
7ccc713a | 3322 | else |
53800dbe | 3323 | /* Evidently an out of date version of <stdarg.h>; can't validate |
3324 | va_start's second argument, but can still work as intended. */ | |
3325 | warning ("`__builtin_next_arg' called without an argument"); | |
3326 | ||
3327 | return expand_binop (Pmode, add_optab, | |
3328 | current_function_internal_arg_pointer, | |
3329 | current_function_arg_offset_rtx, | |
3330 | NULL_RTX, 0, OPTAB_LIB_WIDEN); | |
3331 | } | |
3332 | ||
a66c9326 | 3333 | /* Make it easier for the backends by protecting the valist argument |
3334 | from multiple evaluations. */ | |
3335 | ||
3336 | static tree | |
2d47cc32 | 3337 | stabilize_va_list (valist, needs_lvalue) |
a66c9326 | 3338 | tree valist; |
2d47cc32 | 3339 | int needs_lvalue; |
a66c9326 | 3340 | { |
11a61dea | 3341 | if (TREE_CODE (va_list_type_node) == ARRAY_TYPE) |
a66c9326 | 3342 | { |
2d47cc32 | 3343 | if (TREE_SIDE_EFFECTS (valist)) |
3344 | valist = save_expr (valist); | |
11a61dea | 3345 | |
2d47cc32 | 3346 | /* For this case, the backends will be expecting a pointer to |
3347 | TREE_TYPE (va_list_type_node), but it's possible we've | |
3348 | actually been given an array (an actual va_list_type_node). | |
3349 | So fix it. */ | |
3350 | if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE) | |
8a15c04a | 3351 | { |
bf8e3599 | 3352 | tree p1 = build_pointer_type (TREE_TYPE (va_list_type_node)); |
3353 | tree p2 = build_pointer_type (va_list_type_node); | |
325d1c45 | 3354 | |
bf8e3599 | 3355 | valist = build1 (ADDR_EXPR, p2, valist); |
2d47cc32 | 3356 | valist = fold (build1 (NOP_EXPR, p1, valist)); |
8a15c04a | 3357 | } |
a66c9326 | 3358 | } |
11a61dea | 3359 | else |
a66c9326 | 3360 | { |
2d47cc32 | 3361 | tree pt; |
11a61dea | 3362 | |
2d47cc32 | 3363 | if (! needs_lvalue) |
3364 | { | |
11a61dea | 3365 | if (! TREE_SIDE_EFFECTS (valist)) |
3366 | return valist; | |
bf8e3599 | 3367 | |
11a61dea | 3368 | pt = build_pointer_type (va_list_type_node); |
2d47cc32 | 3369 | valist = fold (build1 (ADDR_EXPR, pt, valist)); |
a66c9326 | 3370 | TREE_SIDE_EFFECTS (valist) = 1; |
a66c9326 | 3371 | } |
2d47cc32 | 3372 | |
11a61dea | 3373 | if (TREE_SIDE_EFFECTS (valist)) |
2d47cc32 | 3374 | valist = save_expr (valist); |
11a61dea | 3375 | valist = fold (build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (valist)), |
3376 | valist)); | |
a66c9326 | 3377 | } |
3378 | ||
3379 | return valist; | |
3380 | } | |
3381 | ||
3382 | /* The "standard" implementation of va_start: just assign `nextarg' to | |
3383 | the variable. */ | |
27d0c333 | 3384 | |
a66c9326 | 3385 | void |
7df226a2 | 3386 | std_expand_builtin_va_start (valist, nextarg) |
a66c9326 | 3387 | tree valist; |
3388 | rtx nextarg; | |
3389 | { | |
3390 | tree t; | |
3391 | ||
3392 | t = build (MODIFY_EXPR, TREE_TYPE (valist), valist, | |
3393 | make_tree (ptr_type_node, nextarg)); | |
3394 | TREE_SIDE_EFFECTS (t) = 1; | |
3395 | ||
3396 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3397 | } | |
3398 | ||
7ccc713a | 3399 | /* Expand ARGLIST, from a call to __builtin_va_start. */ |
27d0c333 | 3400 | |
a66c9326 | 3401 | static rtx |
7ccc713a | 3402 | expand_builtin_va_start (arglist) |
a66c9326 | 3403 | tree arglist; |
3404 | { | |
3405 | rtx nextarg; | |
7ccc713a | 3406 | tree chain, valist; |
a66c9326 | 3407 | |
7ccc713a | 3408 | chain = TREE_CHAIN (arglist); |
a66c9326 | 3409 | |
3410 | if (TREE_CHAIN (chain)) | |
3411 | error ("too many arguments to function `va_start'"); | |
3412 | ||
7ccc713a | 3413 | nextarg = expand_builtin_next_arg (chain); |
a66c9326 | 3414 | valist = stabilize_va_list (TREE_VALUE (arglist), 1); |
3415 | ||
3416 | #ifdef EXPAND_BUILTIN_VA_START | |
7df226a2 | 3417 | EXPAND_BUILTIN_VA_START (valist, nextarg); |
a66c9326 | 3418 | #else |
7df226a2 | 3419 | std_expand_builtin_va_start (valist, nextarg); |
a66c9326 | 3420 | #endif |
3421 | ||
3422 | return const0_rtx; | |
3423 | } | |
3424 | ||
a66c9326 | 3425 | /* The "standard" implementation of va_arg: read the value from the |
3426 | current (padded) address and increment by the (padded) size. */ | |
f7c44134 | 3427 | |
a66c9326 | 3428 | rtx |
3429 | std_expand_builtin_va_arg (valist, type) | |
3430 | tree valist, type; | |
3431 | { | |
91f95e00 | 3432 | tree addr_tree, t, type_size = NULL; |
3433 | tree align, alignm1; | |
3434 | tree rounded_size; | |
a66c9326 | 3435 | rtx addr; |
3436 | ||
3437 | /* Compute the rounded size of the type. */ | |
91f95e00 | 3438 | align = size_int (PARM_BOUNDARY / BITS_PER_UNIT); |
3439 | alignm1 = size_int (PARM_BOUNDARY / BITS_PER_UNIT - 1); | |
3440 | if (type == error_mark_node | |
3441 | || (type_size = TYPE_SIZE_UNIT (TYPE_MAIN_VARIANT (type))) == NULL | |
3442 | || TREE_OVERFLOW (type_size)) | |
3443 | rounded_size = size_zero_node; | |
3444 | else | |
3445 | rounded_size = fold (build (MULT_EXPR, sizetype, | |
3446 | fold (build (TRUNC_DIV_EXPR, sizetype, | |
3447 | fold (build (PLUS_EXPR, sizetype, | |
3448 | type_size, alignm1)), | |
3449 | align)), | |
3450 | align)); | |
a66c9326 | 3451 | |
3452 | /* Get AP. */ | |
3453 | addr_tree = valist; | |
91f95e00 | 3454 | if (PAD_VARARGS_DOWN && ! integer_zerop (rounded_size)) |
a66c9326 | 3455 | { |
3456 | /* Small args are padded downward. */ | |
91f95e00 | 3457 | addr_tree = fold (build (PLUS_EXPR, TREE_TYPE (addr_tree), addr_tree, |
3458 | fold (build (COND_EXPR, sizetype, | |
3459 | fold (build (GT_EXPR, sizetype, | |
3460 | rounded_size, | |
3461 | align)), | |
3462 | size_zero_node, | |
3463 | fold (build (MINUS_EXPR, sizetype, | |
3464 | rounded_size, | |
3465 | type_size)))))); | |
a66c9326 | 3466 | } |
3467 | ||
3468 | addr = expand_expr (addr_tree, NULL_RTX, Pmode, EXPAND_NORMAL); | |
3469 | addr = copy_to_reg (addr); | |
3470 | ||
3471 | /* Compute new value for AP. */ | |
91f95e00 | 3472 | if (! integer_zerop (rounded_size)) |
3473 | { | |
3474 | t = build (MODIFY_EXPR, TREE_TYPE (valist), valist, | |
3475 | build (PLUS_EXPR, TREE_TYPE (valist), valist, | |
3476 | rounded_size)); | |
3477 | TREE_SIDE_EFFECTS (t) = 1; | |
3478 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3479 | } | |
a66c9326 | 3480 | |
3481 | return addr; | |
3482 | } | |
3483 | ||
3484 | /* Expand __builtin_va_arg, which is not really a builtin function, but | |
3485 | a very special sort of operator. */ | |
f7c44134 | 3486 | |
a66c9326 | 3487 | rtx |
3488 | expand_builtin_va_arg (valist, type) | |
3489 | tree valist, type; | |
3490 | { | |
3491 | rtx addr, result; | |
6cd005c9 | 3492 | tree promoted_type, want_va_type, have_va_type; |
a66c9326 | 3493 | |
6cd005c9 | 3494 | /* Verify that valist is of the proper type. */ |
3495 | ||
3496 | want_va_type = va_list_type_node; | |
3497 | have_va_type = TREE_TYPE (valist); | |
3498 | if (TREE_CODE (want_va_type) == ARRAY_TYPE) | |
3499 | { | |
bf8e3599 | 3500 | /* If va_list is an array type, the argument may have decayed |
6cd005c9 | 3501 | to a pointer type, e.g. by being passed to another function. |
3502 | In that case, unwrap both types so that we can compare the | |
3503 | underlying records. */ | |
3504 | if (TREE_CODE (have_va_type) == ARRAY_TYPE | |
3505 | || TREE_CODE (have_va_type) == POINTER_TYPE) | |
3506 | { | |
3507 | want_va_type = TREE_TYPE (want_va_type); | |
3508 | have_va_type = TREE_TYPE (have_va_type); | |
3509 | } | |
3510 | } | |
3511 | if (TYPE_MAIN_VARIANT (want_va_type) != TYPE_MAIN_VARIANT (have_va_type)) | |
a66c9326 | 3512 | { |
e94026da | 3513 | error ("first argument to `va_arg' not of type `va_list'"); |
3514 | addr = const0_rtx; | |
3515 | } | |
6cd005c9 | 3516 | |
3517 | /* Generate a diagnostic for requesting data of a type that cannot | |
3518 | be passed through `...' due to type promotion at the call site. */ | |
63c62881 | 3519 | else if ((promoted_type = (*lang_hooks.types.type_promotes_to) (type)) |
3520 | != type) | |
e94026da | 3521 | { |
01ce7a1b | 3522 | const char *name = "<anonymous type>", *pname = 0; |
a0ef1725 | 3523 | static bool gave_help; |
e94026da | 3524 | |
3525 | if (TYPE_NAME (type)) | |
3526 | { | |
3527 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
3528 | name = IDENTIFIER_POINTER (TYPE_NAME (type)); | |
3529 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
3530 | && DECL_NAME (TYPE_NAME (type))) | |
3531 | name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type))); | |
3532 | } | |
3533 | if (TYPE_NAME (promoted_type)) | |
3534 | { | |
3535 | if (TREE_CODE (TYPE_NAME (promoted_type)) == IDENTIFIER_NODE) | |
3536 | pname = IDENTIFIER_POINTER (TYPE_NAME (promoted_type)); | |
3537 | else if (TREE_CODE (TYPE_NAME (promoted_type)) == TYPE_DECL | |
3538 | && DECL_NAME (TYPE_NAME (promoted_type))) | |
3539 | pname = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (promoted_type))); | |
3540 | } | |
3541 | ||
a0ef1725 | 3542 | /* Unfortunately, this is merely undefined, rather than a constraint |
3543 | violation, so we cannot make this an error. If this call is never | |
3544 | executed, the program is still strictly conforming. */ | |
3545 | warning ("`%s' is promoted to `%s' when passed through `...'", | |
3546 | name, pname); | |
e94026da | 3547 | if (! gave_help) |
3548 | { | |
a0ef1725 | 3549 | gave_help = true; |
3550 | warning ("(so you should pass `%s' not `%s' to `va_arg')", | |
3551 | pname, name); | |
e94026da | 3552 | } |
3553 | ||
a0ef1725 | 3554 | /* We can, however, treat "undefined" any way we please. |
3555 | Call abort to encourage the user to fix the program. */ | |
3556 | expand_builtin_trap (); | |
3557 | ||
3558 | /* This is dead code, but go ahead and finish so that the | |
3559 | mode of the result comes out right. */ | |
a66c9326 | 3560 | addr = const0_rtx; |
3561 | } | |
3562 | else | |
3563 | { | |
3564 | /* Make it easier for the backends by protecting the valist argument | |
3565 | from multiple evaluations. */ | |
3566 | valist = stabilize_va_list (valist, 0); | |
3567 | ||
3568 | #ifdef EXPAND_BUILTIN_VA_ARG | |
3569 | addr = EXPAND_BUILTIN_VA_ARG (valist, type); | |
3570 | #else | |
3571 | addr = std_expand_builtin_va_arg (valist, type); | |
3572 | #endif | |
3573 | } | |
3574 | ||
726ec87c | 3575 | #ifdef POINTERS_EXTEND_UNSIGNED |
3576 | if (GET_MODE (addr) != Pmode) | |
3577 | addr = convert_memory_address (Pmode, addr); | |
3578 | #endif | |
3579 | ||
a66c9326 | 3580 | result = gen_rtx_MEM (TYPE_MODE (type), addr); |
ab6ab77e | 3581 | set_mem_alias_set (result, get_varargs_alias_set ()); |
a66c9326 | 3582 | |
3583 | return result; | |
3584 | } | |
3585 | ||
3586 | /* Expand ARGLIST, from a call to __builtin_va_end. */ | |
f7c44134 | 3587 | |
a66c9326 | 3588 | static rtx |
3589 | expand_builtin_va_end (arglist) | |
8a15c04a | 3590 | tree arglist; |
a66c9326 | 3591 | { |
8a15c04a | 3592 | tree valist = TREE_VALUE (arglist); |
3593 | ||
a66c9326 | 3594 | #ifdef EXPAND_BUILTIN_VA_END |
a66c9326 | 3595 | valist = stabilize_va_list (valist, 0); |
f0ce3b1f | 3596 | EXPAND_BUILTIN_VA_END (arglist); |
8a15c04a | 3597 | #else |
3598 | /* Evaluate for side effects, if needed. I hate macros that don't | |
3599 | do that. */ | |
3600 | if (TREE_SIDE_EFFECTS (valist)) | |
3601 | expand_expr (valist, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
a66c9326 | 3602 | #endif |
3603 | ||
3604 | return const0_rtx; | |
3605 | } | |
3606 | ||
bf8e3599 | 3607 | /* Expand ARGLIST, from a call to __builtin_va_copy. We do this as a |
a66c9326 | 3608 | builtin rather than just as an assignment in stdarg.h because of the |
3609 | nastiness of array-type va_list types. */ | |
f7c44134 | 3610 | |
a66c9326 | 3611 | static rtx |
3612 | expand_builtin_va_copy (arglist) | |
3613 | tree arglist; | |
3614 | { | |
3615 | tree dst, src, t; | |
3616 | ||
3617 | dst = TREE_VALUE (arglist); | |
3618 | src = TREE_VALUE (TREE_CHAIN (arglist)); | |
3619 | ||
3620 | dst = stabilize_va_list (dst, 1); | |
3621 | src = stabilize_va_list (src, 0); | |
3622 | ||
3623 | if (TREE_CODE (va_list_type_node) != ARRAY_TYPE) | |
3624 | { | |
3625 | t = build (MODIFY_EXPR, va_list_type_node, dst, src); | |
3626 | TREE_SIDE_EFFECTS (t) = 1; | |
3627 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3628 | } | |
3629 | else | |
3630 | { | |
11a61dea | 3631 | rtx dstb, srcb, size; |
3632 | ||
3633 | /* Evaluate to pointers. */ | |
3634 | dstb = expand_expr (dst, NULL_RTX, Pmode, EXPAND_NORMAL); | |
3635 | srcb = expand_expr (src, NULL_RTX, Pmode, EXPAND_NORMAL); | |
3636 | size = expand_expr (TYPE_SIZE_UNIT (va_list_type_node), NULL_RTX, | |
3637 | VOIDmode, EXPAND_NORMAL); | |
3638 | ||
726ec87c | 3639 | #ifdef POINTERS_EXTEND_UNSIGNED |
3640 | if (GET_MODE (dstb) != Pmode) | |
3641 | dstb = convert_memory_address (Pmode, dstb); | |
3642 | ||
3643 | if (GET_MODE (srcb) != Pmode) | |
3644 | srcb = convert_memory_address (Pmode, srcb); | |
3645 | #endif | |
3646 | ||
11a61dea | 3647 | /* "Dereference" to BLKmode memories. */ |
3648 | dstb = gen_rtx_MEM (BLKmode, dstb); | |
ab6ab77e | 3649 | set_mem_alias_set (dstb, get_alias_set (TREE_TYPE (TREE_TYPE (dst)))); |
2a631e19 | 3650 | set_mem_align (dstb, TYPE_ALIGN (va_list_type_node)); |
11a61dea | 3651 | srcb = gen_rtx_MEM (BLKmode, srcb); |
ab6ab77e | 3652 | set_mem_alias_set (srcb, get_alias_set (TREE_TYPE (TREE_TYPE (src)))); |
2a631e19 | 3653 | set_mem_align (srcb, TYPE_ALIGN (va_list_type_node)); |
11a61dea | 3654 | |
3655 | /* Copy. */ | |
0378dbdc | 3656 | emit_block_move (dstb, srcb, size, BLOCK_OP_NORMAL); |
a66c9326 | 3657 | } |
3658 | ||
3659 | return const0_rtx; | |
3660 | } | |
3661 | ||
53800dbe | 3662 | /* Expand a call to one of the builtin functions __builtin_frame_address or |
3663 | __builtin_return_address. */ | |
27d0c333 | 3664 | |
53800dbe | 3665 | static rtx |
3666 | expand_builtin_frame_address (exp) | |
3667 | tree exp; | |
3668 | { | |
3669 | tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); | |
3670 | tree arglist = TREE_OPERAND (exp, 1); | |
3671 | ||
3672 | /* The argument must be a nonnegative integer constant. | |
3673 | It counts the number of frames to scan up the stack. | |
3674 | The value is the return address saved in that frame. */ | |
3675 | if (arglist == 0) | |
3676 | /* Warning about missing arg was already issued. */ | |
3677 | return const0_rtx; | |
27d0c333 | 3678 | else if (! host_integerp (TREE_VALUE (arglist), 1)) |
53800dbe | 3679 | { |
3680 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
3681 | error ("invalid arg to `__builtin_frame_address'"); | |
3682 | else | |
3683 | error ("invalid arg to `__builtin_return_address'"); | |
3684 | return const0_rtx; | |
3685 | } | |
3686 | else | |
3687 | { | |
27d0c333 | 3688 | rtx tem |
3689 | = expand_builtin_return_addr (DECL_FUNCTION_CODE (fndecl), | |
3690 | tree_low_cst (TREE_VALUE (arglist), 1), | |
3691 | hard_frame_pointer_rtx); | |
53800dbe | 3692 | |
3693 | /* Some ports cannot access arbitrary stack frames. */ | |
3694 | if (tem == NULL) | |
3695 | { | |
3696 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
3697 | warning ("unsupported arg to `__builtin_frame_address'"); | |
3698 | else | |
3699 | warning ("unsupported arg to `__builtin_return_address'"); | |
3700 | return const0_rtx; | |
3701 | } | |
3702 | ||
3703 | /* For __builtin_frame_address, return what we've got. */ | |
3704 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
3705 | return tem; | |
3706 | ||
3707 | if (GET_CODE (tem) != REG | |
3708 | && ! CONSTANT_P (tem)) | |
3709 | tem = copy_to_mode_reg (Pmode, tem); | |
3710 | return tem; | |
3711 | } | |
3712 | } | |
3713 | ||
3714 | /* Expand a call to the alloca builtin, with arguments ARGLIST. Return 0 if | |
3715 | we failed and the caller should emit a normal call, otherwise try to get | |
3716 | the result in TARGET, if convenient. */ | |
15c6cf6b | 3717 | |
53800dbe | 3718 | static rtx |
3719 | expand_builtin_alloca (arglist, target) | |
3720 | tree arglist; | |
3721 | rtx target; | |
3722 | { | |
3723 | rtx op0; | |
15c6cf6b | 3724 | rtx result; |
53800dbe | 3725 | |
0eb671f7 | 3726 | if (!validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE)) |
53800dbe | 3727 | return 0; |
3728 | ||
3729 | /* Compute the argument. */ | |
3730 | op0 = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0); | |
3731 | ||
3732 | /* Allocate the desired space. */ | |
15c6cf6b | 3733 | result = allocate_dynamic_stack_space (op0, target, BITS_PER_UNIT); |
3734 | ||
3735 | #ifdef POINTERS_EXTEND_UNSIGNED | |
479e4d5e | 3736 | if (GET_MODE (result) != ptr_mode) |
3737 | result = convert_memory_address (ptr_mode, result); | |
15c6cf6b | 3738 | #endif |
3739 | ||
3740 | return result; | |
53800dbe | 3741 | } |
3742 | ||
6a08d0ab | 3743 | /* Expand a call to a unary builtin. The arguments are in ARGLIST. |
53800dbe | 3744 | Return 0 if a normal call should be emitted rather than expanding the |
3745 | function in-line. If convenient, the result should be placed in TARGET. | |
3746 | SUBTARGET may be used as the target for computing one of EXP's operands. */ | |
15c6cf6b | 3747 | |
53800dbe | 3748 | static rtx |
efb070c8 | 3749 | expand_builtin_unop (target_mode, arglist, target, subtarget, op_optab) |
3750 | enum machine_mode target_mode; | |
53800dbe | 3751 | tree arglist; |
3752 | rtx target, subtarget; | |
6a08d0ab | 3753 | optab op_optab; |
53800dbe | 3754 | { |
3755 | rtx op0; | |
0eb671f7 | 3756 | if (!validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE)) |
53800dbe | 3757 | return 0; |
3758 | ||
3759 | /* Compute the argument. */ | |
3760 | op0 = expand_expr (TREE_VALUE (arglist), subtarget, VOIDmode, 0); | |
6a08d0ab | 3761 | /* Compute op, into TARGET if possible. |
53800dbe | 3762 | Set TARGET to wherever the result comes back. */ |
3763 | target = expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))), | |
6a08d0ab | 3764 | op_optab, op0, target, 1); |
53800dbe | 3765 | if (target == 0) |
3766 | abort (); | |
efb070c8 | 3767 | |
3768 | return convert_to_mode (target_mode, target, 0); | |
53800dbe | 3769 | } |
89cfe6e5 | 3770 | |
df94cd3b | 3771 | /* If the string passed to fputs is a constant and is one character |
2c0e001b | 3772 | long, we attempt to transform this call into __builtin_fputc(). */ |
15c6cf6b | 3773 | |
df94cd3b | 3774 | static rtx |
c013a46e | 3775 | expand_builtin_fputs (arglist, ignore, unlocked) |
df94cd3b | 3776 | tree arglist; |
3777 | int ignore; | |
c013a46e | 3778 | int unlocked; |
df94cd3b | 3779 | { |
c013a46e | 3780 | tree len, fn; |
0a68165a | 3781 | tree fn_fputc = unlocked ? implicit_built_in_decls[BUILT_IN_FPUTC_UNLOCKED] |
3782 | : implicit_built_in_decls[BUILT_IN_FPUTC]; | |
3783 | tree fn_fwrite = unlocked ? implicit_built_in_decls[BUILT_IN_FWRITE_UNLOCKED] | |
3784 | : implicit_built_in_decls[BUILT_IN_FWRITE]; | |
df94cd3b | 3785 | |
3786 | /* If the return value is used, or the replacement _DECL isn't | |
2c0e001b | 3787 | initialized, don't do the transformation. */ |
ce1b14f4 | 3788 | if (!ignore || !fn_fputc || !fn_fwrite) |
df94cd3b | 3789 | return 0; |
3790 | ||
2c0e001b | 3791 | /* Verify the arguments in the original call. */ |
8a06f2d4 | 3792 | if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
df94cd3b | 3793 | return 0; |
3794 | ||
ce1b14f4 | 3795 | /* Get the length of the string passed to fputs. If the length |
3796 | can't be determined, punt. */ | |
6840589f | 3797 | if (!(len = c_strlen (TREE_VALUE (arglist))) |
3798 | || TREE_CODE (len) != INTEGER_CST) | |
df94cd3b | 3799 | return 0; |
3800 | ||
ce1b14f4 | 3801 | switch (compare_tree_int (len, 1)) |
3802 | { | |
3803 | case -1: /* length is 0, delete the call entirely . */ | |
6d42b7e4 | 3804 | { |
3805 | /* Evaluate and ignore the argument in case it has | |
3806 | side-effects. */ | |
3807 | expand_expr (TREE_VALUE (TREE_CHAIN (arglist)), const0_rtx, | |
3808 | VOIDmode, EXPAND_NORMAL); | |
3809 | return const0_rtx; | |
3810 | } | |
ce1b14f4 | 3811 | case 0: /* length is 1, call fputc. */ |
3812 | { | |
83d79705 | 3813 | const char *p = c_getstr (TREE_VALUE (arglist)); |
df94cd3b | 3814 | |
83d79705 | 3815 | if (p != NULL) |
bf8e3599 | 3816 | { |
83d79705 | 3817 | /* New argument list transforming fputs(string, stream) to |
3818 | fputc(string[0], stream). */ | |
3819 | arglist = | |
3820 | build_tree_list (NULL_TREE, TREE_VALUE (TREE_CHAIN (arglist))); | |
3821 | arglist = | |
3822 | tree_cons (NULL_TREE, build_int_2 (p[0], 0), arglist); | |
3823 | fn = fn_fputc; | |
3824 | break; | |
3825 | } | |
ce1b14f4 | 3826 | } |
83d79705 | 3827 | /* FALLTHROUGH */ |
ce1b14f4 | 3828 | case 1: /* length is greater than 1, call fwrite. */ |
3829 | { | |
4ec25652 | 3830 | tree string_arg; |
bf8e3599 | 3831 | |
4ec25652 | 3832 | /* If optimizing for size keep fputs. */ |
3833 | if (optimize_size) | |
3834 | return 0; | |
3835 | string_arg = TREE_VALUE (arglist); | |
ce1b14f4 | 3836 | /* New argument list transforming fputs(string, stream) to |
3837 | fwrite(string, 1, len, stream). */ | |
3838 | arglist = build_tree_list (NULL_TREE, TREE_VALUE (TREE_CHAIN (arglist))); | |
3839 | arglist = tree_cons (NULL_TREE, len, arglist); | |
38d76e41 | 3840 | arglist = tree_cons (NULL_TREE, size_one_node, arglist); |
ce1b14f4 | 3841 | arglist = tree_cons (NULL_TREE, string_arg, arglist); |
3842 | fn = fn_fwrite; | |
3843 | break; | |
3844 | } | |
3845 | default: | |
e17f5b23 | 3846 | abort (); |
ce1b14f4 | 3847 | } |
bf8e3599 | 3848 | |
7e15618b | 3849 | return expand_expr (build_function_call_expr (fn, arglist), |
3850 | (ignore ? const0_rtx : NULL_RTX), | |
3311f67b | 3851 | VOIDmode, EXPAND_NORMAL); |
3852 | } | |
3853 | ||
689df48e | 3854 | /* Expand a call to __builtin_expect. We return our argument and emit a |
3855 | NOTE_INSN_EXPECTED_VALUE note. This is the expansion of __builtin_expect in | |
3856 | a non-jump context. */ | |
89cfe6e5 | 3857 | |
3858 | static rtx | |
3859 | expand_builtin_expect (arglist, target) | |
3860 | tree arglist; | |
3861 | rtx target; | |
3862 | { | |
3863 | tree exp, c; | |
3864 | rtx note, rtx_c; | |
3865 | ||
3866 | if (arglist == NULL_TREE | |
3867 | || TREE_CHAIN (arglist) == NULL_TREE) | |
3868 | return const0_rtx; | |
3869 | exp = TREE_VALUE (arglist); | |
3870 | c = TREE_VALUE (TREE_CHAIN (arglist)); | |
3871 | ||
3872 | if (TREE_CODE (c) != INTEGER_CST) | |
3873 | { | |
3874 | error ("second arg to `__builtin_expect' must be a constant"); | |
3875 | c = integer_zero_node; | |
3876 | } | |
3877 | ||
3878 | target = expand_expr (exp, target, VOIDmode, EXPAND_NORMAL); | |
3879 | ||
3880 | /* Don't bother with expected value notes for integral constants. */ | |
b28bedce | 3881 | if (flag_guess_branch_prob && GET_CODE (target) != CONST_INT) |
89cfe6e5 | 3882 | { |
3883 | /* We do need to force this into a register so that we can be | |
3884 | moderately sure to be able to correctly interpret the branch | |
3885 | condition later. */ | |
3886 | target = force_reg (GET_MODE (target), target); | |
bf8e3599 | 3887 | |
89cfe6e5 | 3888 | rtx_c = expand_expr (c, NULL_RTX, GET_MODE (target), EXPAND_NORMAL); |
3889 | ||
3890 | note = emit_note (NULL, NOTE_INSN_EXPECTED_VALUE); | |
3891 | NOTE_EXPECTED_VALUE (note) = gen_rtx_EQ (VOIDmode, target, rtx_c); | |
3892 | } | |
3893 | ||
3894 | return target; | |
3895 | } | |
689df48e | 3896 | |
3897 | /* Like expand_builtin_expect, except do this in a jump context. This is | |
3898 | called from do_jump if the conditional is a __builtin_expect. Return either | |
31d3e01c | 3899 | a list of insns to emit the jump or NULL if we cannot optimize |
689df48e | 3900 | __builtin_expect. We need to optimize this at jump time so that machines |
3901 | like the PowerPC don't turn the test into a SCC operation, and then jump | |
3902 | based on the test being 0/1. */ | |
3903 | ||
3904 | rtx | |
3905 | expand_builtin_expect_jump (exp, if_false_label, if_true_label) | |
3906 | tree exp; | |
3907 | rtx if_false_label; | |
3908 | rtx if_true_label; | |
3909 | { | |
3910 | tree arglist = TREE_OPERAND (exp, 1); | |
3911 | tree arg0 = TREE_VALUE (arglist); | |
3912 | tree arg1 = TREE_VALUE (TREE_CHAIN (arglist)); | |
3913 | rtx ret = NULL_RTX; | |
3914 | ||
3915 | /* Only handle __builtin_expect (test, 0) and | |
3916 | __builtin_expect (test, 1). */ | |
3917 | if (TREE_CODE (TREE_TYPE (arg1)) == INTEGER_TYPE | |
27d0c333 | 3918 | && (integer_zerop (arg1) || integer_onep (arg1))) |
689df48e | 3919 | { |
689df48e | 3920 | int num_jumps = 0; |
31d3e01c | 3921 | rtx insn; |
689df48e | 3922 | |
1dc55962 | 3923 | /* If we fail to locate an appropriate conditional jump, we'll |
3924 | fall back to normal evaluation. Ensure that the expression | |
3925 | can be re-evaluated. */ | |
3926 | switch (unsafe_for_reeval (arg0)) | |
3927 | { | |
3928 | case 0: /* Safe. */ | |
3929 | break; | |
3930 | ||
3931 | case 1: /* Mildly unsafe. */ | |
3932 | arg0 = unsave_expr (arg0); | |
3933 | break; | |
3934 | ||
3935 | case 2: /* Wildly unsafe. */ | |
3936 | return NULL_RTX; | |
3937 | } | |
3938 | ||
689df48e | 3939 | /* Expand the jump insns. */ |
3940 | start_sequence (); | |
3941 | do_jump (arg0, if_false_label, if_true_label); | |
31d3e01c | 3942 | ret = get_insns (); |
689df48e | 3943 | end_sequence (); |
3944 | ||
3945 | /* Now that the __builtin_expect has been validated, go through and add | |
3946 | the expect's to each of the conditional jumps. If we run into an | |
3947 | error, just give up and generate the 'safe' code of doing a SCC | |
3948 | operation and then doing a branch on that. */ | |
31d3e01c | 3949 | insn = ret; |
3950 | while (insn != NULL_RTX) | |
689df48e | 3951 | { |
31d3e01c | 3952 | rtx next = NEXT_INSN (insn); |
689df48e | 3953 | rtx pattern; |
3954 | ||
3955 | if (GET_CODE (insn) == JUMP_INSN && any_condjump_p (insn) | |
3956 | && (pattern = pc_set (insn)) != NULL_RTX) | |
3957 | { | |
3958 | rtx ifelse = SET_SRC (pattern); | |
3959 | rtx label; | |
3960 | int taken; | |
3961 | ||
3962 | if (GET_CODE (ifelse) != IF_THEN_ELSE) | |
31d3e01c | 3963 | goto do_next_insn; |
689df48e | 3964 | |
3965 | if (GET_CODE (XEXP (ifelse, 1)) == LABEL_REF) | |
3966 | { | |
3967 | taken = 1; | |
3968 | label = XEXP (XEXP (ifelse, 1), 0); | |
3969 | } | |
3970 | /* An inverted jump reverses the probabilities. */ | |
3971 | else if (GET_CODE (XEXP (ifelse, 2)) == LABEL_REF) | |
3972 | { | |
3973 | taken = 0; | |
3974 | label = XEXP (XEXP (ifelse, 2), 0); | |
3975 | } | |
3976 | /* We shouldn't have to worry about conditional returns during | |
3977 | the expansion stage, but handle it gracefully anyway. */ | |
3978 | else if (GET_CODE (XEXP (ifelse, 1)) == RETURN) | |
3979 | { | |
3980 | taken = 1; | |
3981 | label = NULL_RTX; | |
3982 | } | |
3983 | /* An inverted return reverses the probabilities. */ | |
3984 | else if (GET_CODE (XEXP (ifelse, 2)) == RETURN) | |
3985 | { | |
3986 | taken = 0; | |
3987 | label = NULL_RTX; | |
3988 | } | |
3989 | else | |
31d3e01c | 3990 | goto do_next_insn; |
689df48e | 3991 | |
3992 | /* If the test is expected to fail, reverse the | |
3993 | probabilities. */ | |
27d0c333 | 3994 | if (integer_zerop (arg1)) |
689df48e | 3995 | taken = 1 - taken; |
3996 | ||
3997 | /* If we are jumping to the false label, reverse the | |
3998 | probabilities. */ | |
3999 | if (label == NULL_RTX) | |
4000 | ; /* conditional return */ | |
4001 | else if (label == if_false_label) | |
4002 | taken = 1 - taken; | |
4003 | else if (label != if_true_label) | |
31d3e01c | 4004 | goto do_next_insn; |
689df48e | 4005 | |
4006 | num_jumps++; | |
4007 | predict_insn_def (insn, PRED_BUILTIN_EXPECT, taken); | |
4008 | } | |
31d3e01c | 4009 | |
4010 | do_next_insn: | |
4011 | insn = next; | |
689df48e | 4012 | } |
4013 | ||
4014 | /* If no jumps were modified, fail and do __builtin_expect the normal | |
4015 | way. */ | |
4016 | if (num_jumps == 0) | |
4017 | ret = NULL_RTX; | |
4018 | } | |
4019 | ||
4020 | return ret; | |
4021 | } | |
a0ef1725 | 4022 | |
4023 | void | |
4024 | expand_builtin_trap () | |
4025 | { | |
4026 | #ifdef HAVE_trap | |
4027 | if (HAVE_trap) | |
4028 | emit_insn (gen_trap ()); | |
4029 | else | |
4030 | #endif | |
4031 | emit_library_call (abort_libfunc, LCT_NORETURN, VOIDmode, 0); | |
4032 | emit_barrier (); | |
4033 | } | |
53800dbe | 4034 | \f |
4035 | /* Expand an expression EXP that calls a built-in function, | |
4036 | with result going to TARGET if that's convenient | |
4037 | (and in mode MODE if that's convenient). | |
4038 | SUBTARGET may be used as the target for computing one of EXP's operands. | |
4039 | IGNORE is nonzero if the value is to be ignored. */ | |
4040 | ||
4041 | rtx | |
4042 | expand_builtin (exp, target, subtarget, mode, ignore) | |
4043 | tree exp; | |
4044 | rtx target; | |
4045 | rtx subtarget; | |
4046 | enum machine_mode mode; | |
4047 | int ignore; | |
4048 | { | |
4049 | tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); | |
4050 | tree arglist = TREE_OPERAND (exp, 1); | |
4051 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
efb070c8 | 4052 | enum machine_mode target_mode = TYPE_MODE (TREE_TYPE (exp)); |
53800dbe | 4053 | |
313b27fa | 4054 | Content-type: text/html ]>