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53800dbe | 1 | /* Expand builtin functions. |
8e8f6434 | 2 | Copyright (C) 1988-2018 Free Software Foundation, Inc. |
53800dbe | 3 | |
f12b58b3 | 4 | This file is part of GCC. |
53800dbe | 5 | |
f12b58b3 | 6 | GCC is free software; you can redistribute it and/or modify it under |
7 | the terms of the GNU General Public License as published by the Free | |
8c4c00c1 | 8 | Software Foundation; either version 3, or (at your option) any later |
f12b58b3 | 9 | version. |
53800dbe | 10 | |
f12b58b3 | 11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
53800dbe | 15 | |
16 | You should have received a copy of the GNU General Public License | |
8c4c00c1 | 17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
53800dbe | 19 | |
7c2ecb89 | 20 | /* Legacy warning! Please add no further builtin simplifications here |
21 | (apart from pure constant folding) - builtin simplifications should go | |
22 | to match.pd or gimple-fold.c instead. */ | |
23 | ||
53800dbe | 24 | #include "config.h" |
25 | #include "system.h" | |
805e22b2 | 26 | #include "coretypes.h" |
9ef16211 | 27 | #include "backend.h" |
7c29e30e | 28 | #include "target.h" |
29 | #include "rtl.h" | |
9ef16211 | 30 | #include "tree.h" |
ea36272b | 31 | #include "memmodel.h" |
9ef16211 | 32 | #include "gimple.h" |
7c29e30e | 33 | #include "predict.h" |
a950155e | 34 | #include "params.h" |
7c29e30e | 35 | #include "tm_p.h" |
36 | #include "stringpool.h" | |
c296f633 | 37 | #include "tree-vrp.h" |
7c29e30e | 38 | #include "tree-ssanames.h" |
39 | #include "expmed.h" | |
40 | #include "optabs.h" | |
7c29e30e | 41 | #include "emit-rtl.h" |
42 | #include "recog.h" | |
7c29e30e | 43 | #include "diagnostic-core.h" |
b20a8bb4 | 44 | #include "alias.h" |
b20a8bb4 | 45 | #include "fold-const.h" |
6c21be92 | 46 | #include "fold-const-call.h" |
e6a18b5a | 47 | #include "gimple-ssa-warn-restrict.h" |
9ed99284 | 48 | #include "stor-layout.h" |
49 | #include "calls.h" | |
50 | #include "varasm.h" | |
51 | #include "tree-object-size.h" | |
dae0b5cb | 52 | #include "realmpfr.h" |
94ea8568 | 53 | #include "cfgrtl.h" |
53800dbe | 54 | #include "except.h" |
d53441c8 | 55 | #include "dojump.h" |
56 | #include "explow.h" | |
d53441c8 | 57 | #include "stmt.h" |
53800dbe | 58 | #include "expr.h" |
d8fc4d0b | 59 | #include "libfuncs.h" |
53800dbe | 60 | #include "output.h" |
61 | #include "typeclass.h" | |
63c62881 | 62 | #include "langhooks.h" |
162719b3 | 63 | #include "value-prof.h" |
3b9c3a16 | 64 | #include "builtins.h" |
30a86690 | 65 | #include "stringpool.h" |
66 | #include "attribs.h" | |
f9acf11a | 67 | #include "asan.h" |
1f24b8e9 | 68 | #include "internal-fn.h" |
e3240774 | 69 | #include "case-cfn-macros.h" |
732905bb | 70 | #include "gimple-fold.h" |
5aef8938 | 71 | #include "intl.h" |
859b51f8 | 72 | #include "file-prefix-map.h" /* remap_macro_filename() */ |
a7babc1e | 73 | #include "gomp-constants.h" |
74 | #include "omp-general.h" | |
5383fb56 | 75 | |
3b9c3a16 | 76 | struct target_builtins default_target_builtins; |
77 | #if SWITCHABLE_TARGET | |
78 | struct target_builtins *this_target_builtins = &default_target_builtins; | |
79 | #endif | |
80 | ||
ab7943b9 | 81 | /* Define the names of the builtin function types and codes. */ |
96423453 | 82 | const char *const built_in_class_names[BUILT_IN_LAST] |
ab7943b9 | 83 | = {"NOT_BUILT_IN", "BUILT_IN_FRONTEND", "BUILT_IN_MD", "BUILT_IN_NORMAL"}; |
84 | ||
9cfddb70 | 85 | #define DEF_BUILTIN(X, N, C, T, LT, B, F, NA, AT, IM, COND) #X, |
0dfc45b5 | 86 | const char * built_in_names[(int) END_BUILTINS] = |
4e9d90c7 | 87 | { |
88 | #include "builtins.def" | |
89 | }; | |
ab7943b9 | 90 | |
cffdfb3d | 91 | /* Setup an array of builtin_info_type, make sure each element decl is |
df94cd3b | 92 | initialized to NULL_TREE. */ |
cffdfb3d | 93 | builtin_info_type builtin_info[(int)END_BUILTINS]; |
df94cd3b | 94 | |
0b049e15 | 95 | /* Non-zero if __builtin_constant_p should be folded right away. */ |
96 | bool force_folding_builtin_constant_p; | |
97 | ||
f77c4496 | 98 | static rtx c_readstr (const char *, scalar_int_mode); |
aecda0d6 | 99 | static int target_char_cast (tree, char *); |
d8ae1baa | 100 | static rtx get_memory_rtx (tree, tree); |
aecda0d6 | 101 | static int apply_args_size (void); |
102 | static int apply_result_size (void); | |
aecda0d6 | 103 | static rtx result_vector (int, rtx); |
aecda0d6 | 104 | static void expand_builtin_prefetch (tree); |
105 | static rtx expand_builtin_apply_args (void); | |
106 | static rtx expand_builtin_apply_args_1 (void); | |
107 | static rtx expand_builtin_apply (rtx, rtx, rtx); | |
108 | static void expand_builtin_return (rtx); | |
109 | static enum type_class type_to_class (tree); | |
110 | static rtx expand_builtin_classify_type (tree); | |
6b43bae4 | 111 | static rtx expand_builtin_mathfn_3 (tree, rtx, rtx); |
7e0713b1 | 112 | static rtx expand_builtin_mathfn_ternary (tree, rtx, rtx); |
f97eea22 | 113 | static rtx expand_builtin_interclass_mathfn (tree, rtx); |
c3147c1a | 114 | static rtx expand_builtin_sincos (tree); |
f97eea22 | 115 | static rtx expand_builtin_cexpi (tree, rtx); |
ff1b14e4 | 116 | static rtx expand_builtin_int_roundingfn (tree, rtx); |
117 | static rtx expand_builtin_int_roundingfn_2 (tree, rtx); | |
79012a9d | 118 | static rtx expand_builtin_next_arg (void); |
aecda0d6 | 119 | static rtx expand_builtin_va_start (tree); |
120 | static rtx expand_builtin_va_end (tree); | |
121 | static rtx expand_builtin_va_copy (tree); | |
0dbefa15 | 122 | static rtx inline_expand_builtin_string_cmp (tree, rtx); |
a65c4d64 | 123 | static rtx expand_builtin_strcmp (tree, rtx); |
3754d046 | 124 | static rtx expand_builtin_strncmp (tree, rtx, machine_mode); |
f77c4496 | 125 | static rtx builtin_memcpy_read_str (void *, HOST_WIDE_INT, scalar_int_mode); |
8d6c6ef5 | 126 | static rtx expand_builtin_memchr (tree, rtx); |
a65c4d64 | 127 | static rtx expand_builtin_memcpy (tree, rtx); |
d0fbba1a | 128 | static rtx expand_builtin_memory_copy_args (tree dest, tree src, tree len, |
129 | rtx target, tree exp, int endp); | |
4d317237 | 130 | static rtx expand_builtin_memmove (tree, rtx); |
d0fbba1a | 131 | static rtx expand_builtin_mempcpy (tree, rtx); |
d0fbba1a | 132 | static rtx expand_builtin_mempcpy_args (tree, tree, tree, rtx, tree, int); |
5aef8938 | 133 | static rtx expand_builtin_strcat (tree, rtx); |
a65c4d64 | 134 | static rtx expand_builtin_strcpy (tree, rtx); |
a788aa5f | 135 | static rtx expand_builtin_strcpy_args (tree, tree, tree, rtx); |
3754d046 | 136 | static rtx expand_builtin_stpcpy (tree, rtx, machine_mode); |
4d317237 | 137 | static rtx expand_builtin_stpncpy (tree, rtx); |
5aef8938 | 138 | static rtx expand_builtin_strncat (tree, rtx); |
a65c4d64 | 139 | static rtx expand_builtin_strncpy (tree, rtx); |
f77c4496 | 140 | static rtx builtin_memset_gen_str (void *, HOST_WIDE_INT, scalar_int_mode); |
3754d046 | 141 | static rtx expand_builtin_memset (tree, rtx, machine_mode); |
142 | static rtx expand_builtin_memset_args (tree, tree, tree, rtx, machine_mode, tree); | |
aecda0d6 | 143 | static rtx expand_builtin_bzero (tree); |
3754d046 | 144 | static rtx expand_builtin_strlen (tree, rtx, machine_mode); |
864bd5de | 145 | static rtx expand_builtin_strnlen (tree, rtx, machine_mode); |
2b29cc6a | 146 | static rtx expand_builtin_alloca (tree); |
3754d046 | 147 | static rtx expand_builtin_unop (machine_mode, tree, rtx, rtx, optab); |
aecda0d6 | 148 | static rtx expand_builtin_frame_address (tree, tree); |
389dd41b | 149 | static tree stabilize_va_list_loc (location_t, tree, int); |
aecda0d6 | 150 | static rtx expand_builtin_expect (tree, rtx); |
01107f42 | 151 | static rtx expand_builtin_expect_with_probability (tree, rtx); |
aecda0d6 | 152 | static tree fold_builtin_constant_p (tree); |
153 | static tree fold_builtin_classify_type (tree); | |
c7cbde74 | 154 | static tree fold_builtin_strlen (location_t, tree, tree); |
389dd41b | 155 | static tree fold_builtin_inf (location_t, tree, int); |
389dd41b | 156 | static tree rewrite_call_expr (location_t, tree, int, tree, int, ...); |
184fac50 | 157 | static bool validate_arg (const_tree, enum tree_code code); |
aecda0d6 | 158 | static rtx expand_builtin_fabs (tree, rtx, rtx); |
27f261ef | 159 | static rtx expand_builtin_signbit (tree, rtx); |
389dd41b | 160 | static tree fold_builtin_memcmp (location_t, tree, tree, tree); |
389dd41b | 161 | static tree fold_builtin_isascii (location_t, tree); |
162 | static tree fold_builtin_toascii (location_t, tree); | |
163 | static tree fold_builtin_isdigit (location_t, tree); | |
164 | static tree fold_builtin_fabs (location_t, tree, tree); | |
165 | static tree fold_builtin_abs (location_t, tree, tree); | |
166 | static tree fold_builtin_unordered_cmp (location_t, tree, tree, tree, enum tree_code, | |
d5019fe8 | 167 | enum tree_code); |
e80cc485 | 168 | static tree fold_builtin_0 (location_t, tree); |
169 | static tree fold_builtin_1 (location_t, tree, tree); | |
170 | static tree fold_builtin_2 (location_t, tree, tree, tree); | |
171 | static tree fold_builtin_3 (location_t, tree, tree, tree, tree); | |
12f08300 | 172 | static tree fold_builtin_varargs (location_t, tree, tree*, int); |
389dd41b | 173 | |
174 | static tree fold_builtin_strpbrk (location_t, tree, tree, tree); | |
389dd41b | 175 | static tree fold_builtin_strspn (location_t, tree, tree); |
176 | static tree fold_builtin_strcspn (location_t, tree, tree); | |
4ee9c684 | 177 | |
0a39fd54 | 178 | static rtx expand_builtin_object_size (tree); |
3754d046 | 179 | static rtx expand_builtin_memory_chk (tree, rtx, machine_mode, |
0a39fd54 | 180 | enum built_in_function); |
181 | static void maybe_emit_chk_warning (tree, enum built_in_function); | |
182 | static void maybe_emit_sprintf_chk_warning (tree, enum built_in_function); | |
2c281b15 | 183 | static void maybe_emit_free_warning (tree); |
c2f47e15 | 184 | static tree fold_builtin_object_size (tree, tree); |
99eabcc1 | 185 | |
e788f202 | 186 | unsigned HOST_WIDE_INT target_newline; |
b9ea678c | 187 | unsigned HOST_WIDE_INT target_percent; |
99eabcc1 | 188 | static unsigned HOST_WIDE_INT target_c; |
189 | static unsigned HOST_WIDE_INT target_s; | |
aea88c77 | 190 | char target_percent_c[3]; |
b9ea678c | 191 | char target_percent_s[3]; |
e788f202 | 192 | char target_percent_s_newline[4]; |
e5407ca6 | 193 | static tree do_mpfr_remquo (tree, tree, tree); |
e84da7c1 | 194 | static tree do_mpfr_lgamma_r (tree, tree, tree); |
1cd6e20d | 195 | static void expand_builtin_sync_synchronize (void); |
0a39fd54 | 196 | |
7bfefa9d | 197 | /* Return true if NAME starts with __builtin_ or __sync_. */ |
198 | ||
b29139ad | 199 | static bool |
1c47b3e8 | 200 | is_builtin_name (const char *name) |
b6a5fc45 | 201 | { |
b6a5fc45 | 202 | if (strncmp (name, "__builtin_", 10) == 0) |
203 | return true; | |
204 | if (strncmp (name, "__sync_", 7) == 0) | |
205 | return true; | |
1cd6e20d | 206 | if (strncmp (name, "__atomic_", 9) == 0) |
207 | return true; | |
b6a5fc45 | 208 | return false; |
209 | } | |
4ee9c684 | 210 | |
1c47b3e8 | 211 | /* Return true if NODE should be considered for inline expansion regardless |
212 | of the optimization level. This means whenever a function is invoked with | |
213 | its "internal" name, which normally contains the prefix "__builtin". */ | |
214 | ||
ae62deea | 215 | bool |
1c47b3e8 | 216 | called_as_built_in (tree node) |
217 | { | |
218 | /* Note that we must use DECL_NAME, not DECL_ASSEMBLER_NAME_SET_P since | |
219 | we want the name used to call the function, not the name it | |
220 | will have. */ | |
221 | const char *name = IDENTIFIER_POINTER (DECL_NAME (node)); | |
222 | return is_builtin_name (name); | |
223 | } | |
224 | ||
ceea063b | 225 | /* Compute values M and N such that M divides (address of EXP - N) and such |
226 | that N < M. If these numbers can be determined, store M in alignp and N in | |
227 | *BITPOSP and return true. Otherwise return false and store BITS_PER_UNIT to | |
228 | *alignp and any bit-offset to *bitposp. | |
0d8f7716 | 229 | |
230 | Note that the address (and thus the alignment) computed here is based | |
231 | on the address to which a symbol resolves, whereas DECL_ALIGN is based | |
232 | on the address at which an object is actually located. These two | |
233 | addresses are not always the same. For example, on ARM targets, | |
234 | the address &foo of a Thumb function foo() has the lowest bit set, | |
3482bf13 | 235 | whereas foo() itself starts on an even address. |
698537d1 | 236 | |
3482bf13 | 237 | If ADDR_P is true we are taking the address of the memory reference EXP |
238 | and thus cannot rely on the access taking place. */ | |
239 | ||
240 | static bool | |
241 | get_object_alignment_2 (tree exp, unsigned int *alignp, | |
242 | unsigned HOST_WIDE_INT *bitposp, bool addr_p) | |
698537d1 | 243 | { |
eaa09bfd | 244 | poly_int64 bitsize, bitpos; |
98ab9e8f | 245 | tree offset; |
3754d046 | 246 | machine_mode mode; |
292237f3 | 247 | int unsignedp, reversep, volatilep; |
c8a2b4ff | 248 | unsigned int align = BITS_PER_UNIT; |
ceea063b | 249 | bool known_alignment = false; |
698537d1 | 250 | |
98ab9e8f | 251 | /* Get the innermost object and the constant (bitpos) and possibly |
252 | variable (offset) offset of the access. */ | |
292237f3 | 253 | exp = get_inner_reference (exp, &bitsize, &bitpos, &offset, &mode, |
b3b6e4b5 | 254 | &unsignedp, &reversep, &volatilep); |
98ab9e8f | 255 | |
256 | /* Extract alignment information from the innermost object and | |
257 | possibly adjust bitpos and offset. */ | |
3482bf13 | 258 | if (TREE_CODE (exp) == FUNCTION_DECL) |
0d8f7716 | 259 | { |
3482bf13 | 260 | /* Function addresses can encode extra information besides their |
261 | alignment. However, if TARGET_PTRMEMFUNC_VBIT_LOCATION | |
262 | allows the low bit to be used as a virtual bit, we know | |
263 | that the address itself must be at least 2-byte aligned. */ | |
264 | if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn) | |
265 | align = 2 * BITS_PER_UNIT; | |
0d8f7716 | 266 | } |
3482bf13 | 267 | else if (TREE_CODE (exp) == LABEL_DECL) |
268 | ; | |
269 | else if (TREE_CODE (exp) == CONST_DECL) | |
98ab9e8f | 270 | { |
3482bf13 | 271 | /* The alignment of a CONST_DECL is determined by its initializer. */ |
272 | exp = DECL_INITIAL (exp); | |
98ab9e8f | 273 | align = TYPE_ALIGN (TREE_TYPE (exp)); |
3482bf13 | 274 | if (CONSTANT_CLASS_P (exp)) |
579d67ba | 275 | align = targetm.constant_alignment (exp, align); |
e532afed | 276 | |
3482bf13 | 277 | known_alignment = true; |
98ab9e8f | 278 | } |
3482bf13 | 279 | else if (DECL_P (exp)) |
ceea063b | 280 | { |
3482bf13 | 281 | align = DECL_ALIGN (exp); |
ceea063b | 282 | known_alignment = true; |
ceea063b | 283 | } |
3482bf13 | 284 | else if (TREE_CODE (exp) == INDIRECT_REF |
285 | || TREE_CODE (exp) == MEM_REF | |
286 | || TREE_CODE (exp) == TARGET_MEM_REF) | |
98ab9e8f | 287 | { |
288 | tree addr = TREE_OPERAND (exp, 0); | |
ceea063b | 289 | unsigned ptr_align; |
290 | unsigned HOST_WIDE_INT ptr_bitpos; | |
ab1e78e5 | 291 | unsigned HOST_WIDE_INT ptr_bitmask = ~0; |
ceea063b | 292 | |
ab1e78e5 | 293 | /* If the address is explicitely aligned, handle that. */ |
98ab9e8f | 294 | if (TREE_CODE (addr) == BIT_AND_EXPR |
295 | && TREE_CODE (TREE_OPERAND (addr, 1)) == INTEGER_CST) | |
296 | { | |
ab1e78e5 | 297 | ptr_bitmask = TREE_INT_CST_LOW (TREE_OPERAND (addr, 1)); |
298 | ptr_bitmask *= BITS_PER_UNIT; | |
ac29ece2 | 299 | align = least_bit_hwi (ptr_bitmask); |
98ab9e8f | 300 | addr = TREE_OPERAND (addr, 0); |
301 | } | |
ceea063b | 302 | |
3482bf13 | 303 | known_alignment |
304 | = get_pointer_alignment_1 (addr, &ptr_align, &ptr_bitpos); | |
3482bf13 | 305 | align = MAX (ptr_align, align); |
306 | ||
ab1e78e5 | 307 | /* Re-apply explicit alignment to the bitpos. */ |
308 | ptr_bitpos &= ptr_bitmask; | |
309 | ||
4083990a | 310 | /* The alignment of the pointer operand in a TARGET_MEM_REF |
311 | has to take the variable offset parts into account. */ | |
3482bf13 | 312 | if (TREE_CODE (exp) == TARGET_MEM_REF) |
153c3b50 | 313 | { |
3482bf13 | 314 | if (TMR_INDEX (exp)) |
315 | { | |
316 | unsigned HOST_WIDE_INT step = 1; | |
317 | if (TMR_STEP (exp)) | |
f9ae6f95 | 318 | step = TREE_INT_CST_LOW (TMR_STEP (exp)); |
ac29ece2 | 319 | align = MIN (align, least_bit_hwi (step) * BITS_PER_UNIT); |
3482bf13 | 320 | } |
321 | if (TMR_INDEX2 (exp)) | |
322 | align = BITS_PER_UNIT; | |
323 | known_alignment = false; | |
153c3b50 | 324 | } |
ceea063b | 325 | |
3482bf13 | 326 | /* When EXP is an actual memory reference then we can use |
327 | TYPE_ALIGN of a pointer indirection to derive alignment. | |
328 | Do so only if get_pointer_alignment_1 did not reveal absolute | |
4083990a | 329 | alignment knowledge and if using that alignment would |
330 | improve the situation. */ | |
700a9760 | 331 | unsigned int talign; |
4083990a | 332 | if (!addr_p && !known_alignment |
700a9760 | 333 | && (talign = min_align_of_type (TREE_TYPE (exp)) * BITS_PER_UNIT) |
334 | && talign > align) | |
335 | align = talign; | |
4083990a | 336 | else |
337 | { | |
338 | /* Else adjust bitpos accordingly. */ | |
339 | bitpos += ptr_bitpos; | |
340 | if (TREE_CODE (exp) == MEM_REF | |
341 | || TREE_CODE (exp) == TARGET_MEM_REF) | |
90ca1268 | 342 | bitpos += mem_ref_offset (exp).force_shwi () * BITS_PER_UNIT; |
4083990a | 343 | } |
98ab9e8f | 344 | } |
3482bf13 | 345 | else if (TREE_CODE (exp) == STRING_CST) |
153c3b50 | 346 | { |
3482bf13 | 347 | /* STRING_CST are the only constant objects we allow to be not |
348 | wrapped inside a CONST_DECL. */ | |
349 | align = TYPE_ALIGN (TREE_TYPE (exp)); | |
3482bf13 | 350 | if (CONSTANT_CLASS_P (exp)) |
579d67ba | 351 | align = targetm.constant_alignment (exp, align); |
e532afed | 352 | |
3482bf13 | 353 | known_alignment = true; |
98ab9e8f | 354 | } |
98ab9e8f | 355 | |
356 | /* If there is a non-constant offset part extract the maximum | |
357 | alignment that can prevail. */ | |
c8a2b4ff | 358 | if (offset) |
98ab9e8f | 359 | { |
ad464c56 | 360 | unsigned int trailing_zeros = tree_ctz (offset); |
c8a2b4ff | 361 | if (trailing_zeros < HOST_BITS_PER_INT) |
98ab9e8f | 362 | { |
c8a2b4ff | 363 | unsigned int inner = (1U << trailing_zeros) * BITS_PER_UNIT; |
364 | if (inner) | |
365 | align = MIN (align, inner); | |
98ab9e8f | 366 | } |
98ab9e8f | 367 | } |
368 | ||
eaa09bfd | 369 | /* Account for the alignment of runtime coefficients, so that the constant |
370 | bitpos is guaranteed to be accurate. */ | |
371 | unsigned int alt_align = ::known_alignment (bitpos - bitpos.coeffs[0]); | |
372 | if (alt_align != 0 && alt_align < align) | |
373 | { | |
374 | align = alt_align; | |
375 | known_alignment = false; | |
376 | } | |
377 | ||
3482bf13 | 378 | *alignp = align; |
eaa09bfd | 379 | *bitposp = bitpos.coeffs[0] & (align - 1); |
ceea063b | 380 | return known_alignment; |
0c883ef3 | 381 | } |
382 | ||
3482bf13 | 383 | /* For a memory reference expression EXP compute values M and N such that M |
384 | divides (&EXP - N) and such that N < M. If these numbers can be determined, | |
385 | store M in alignp and N in *BITPOSP and return true. Otherwise return false | |
386 | and store BITS_PER_UNIT to *alignp and any bit-offset to *bitposp. */ | |
387 | ||
388 | bool | |
389 | get_object_alignment_1 (tree exp, unsigned int *alignp, | |
390 | unsigned HOST_WIDE_INT *bitposp) | |
391 | { | |
392 | return get_object_alignment_2 (exp, alignp, bitposp, false); | |
393 | } | |
394 | ||
957d0361 | 395 | /* Return the alignment in bits of EXP, an object. */ |
0c883ef3 | 396 | |
397 | unsigned int | |
957d0361 | 398 | get_object_alignment (tree exp) |
0c883ef3 | 399 | { |
400 | unsigned HOST_WIDE_INT bitpos = 0; | |
401 | unsigned int align; | |
402 | ||
ceea063b | 403 | get_object_alignment_1 (exp, &align, &bitpos); |
0c883ef3 | 404 | |
98ab9e8f | 405 | /* align and bitpos now specify known low bits of the pointer. |
406 | ptr & (align - 1) == bitpos. */ | |
407 | ||
408 | if (bitpos != 0) | |
ac29ece2 | 409 | align = least_bit_hwi (bitpos); |
957d0361 | 410 | return align; |
698537d1 | 411 | } |
412 | ||
ceea063b | 413 | /* For a pointer valued expression EXP compute values M and N such that M |
414 | divides (EXP - N) and such that N < M. If these numbers can be determined, | |
3482bf13 | 415 | store M in alignp and N in *BITPOSP and return true. Return false if |
416 | the results are just a conservative approximation. | |
53800dbe | 417 | |
ceea063b | 418 | If EXP is not a pointer, false is returned too. */ |
53800dbe | 419 | |
ceea063b | 420 | bool |
421 | get_pointer_alignment_1 (tree exp, unsigned int *alignp, | |
422 | unsigned HOST_WIDE_INT *bitposp) | |
53800dbe | 423 | { |
153c3b50 | 424 | STRIP_NOPS (exp); |
535e2026 | 425 | |
153c3b50 | 426 | if (TREE_CODE (exp) == ADDR_EXPR) |
3482bf13 | 427 | return get_object_alignment_2 (TREE_OPERAND (exp, 0), |
428 | alignp, bitposp, true); | |
906a9403 | 429 | else if (TREE_CODE (exp) == POINTER_PLUS_EXPR) |
430 | { | |
431 | unsigned int align; | |
432 | unsigned HOST_WIDE_INT bitpos; | |
433 | bool res = get_pointer_alignment_1 (TREE_OPERAND (exp, 0), | |
434 | &align, &bitpos); | |
435 | if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST) | |
436 | bitpos += TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)) * BITS_PER_UNIT; | |
437 | else | |
438 | { | |
439 | unsigned int trailing_zeros = tree_ctz (TREE_OPERAND (exp, 1)); | |
440 | if (trailing_zeros < HOST_BITS_PER_INT) | |
441 | { | |
442 | unsigned int inner = (1U << trailing_zeros) * BITS_PER_UNIT; | |
443 | if (inner) | |
444 | align = MIN (align, inner); | |
445 | } | |
446 | } | |
447 | *alignp = align; | |
448 | *bitposp = bitpos & (align - 1); | |
449 | return res; | |
450 | } | |
153c3b50 | 451 | else if (TREE_CODE (exp) == SSA_NAME |
452 | && POINTER_TYPE_P (TREE_TYPE (exp))) | |
53800dbe | 453 | { |
ceea063b | 454 | unsigned int ptr_align, ptr_misalign; |
153c3b50 | 455 | struct ptr_info_def *pi = SSA_NAME_PTR_INFO (exp); |
ceea063b | 456 | |
457 | if (pi && get_ptr_info_alignment (pi, &ptr_align, &ptr_misalign)) | |
458 | { | |
459 | *bitposp = ptr_misalign * BITS_PER_UNIT; | |
460 | *alignp = ptr_align * BITS_PER_UNIT; | |
d10da77a | 461 | /* Make sure to return a sensible alignment when the multiplication |
462 | by BITS_PER_UNIT overflowed. */ | |
463 | if (*alignp == 0) | |
464 | *alignp = 1u << (HOST_BITS_PER_INT - 1); | |
3482bf13 | 465 | /* We cannot really tell whether this result is an approximation. */ |
b428654a | 466 | return false; |
ceea063b | 467 | } |
468 | else | |
69fbc3aa | 469 | { |
470 | *bitposp = 0; | |
ceea063b | 471 | *alignp = BITS_PER_UNIT; |
472 | return false; | |
69fbc3aa | 473 | } |
53800dbe | 474 | } |
0bb8b39a | 475 | else if (TREE_CODE (exp) == INTEGER_CST) |
476 | { | |
477 | *alignp = BIGGEST_ALIGNMENT; | |
f9ae6f95 | 478 | *bitposp = ((TREE_INT_CST_LOW (exp) * BITS_PER_UNIT) |
0bb8b39a | 479 | & (BIGGEST_ALIGNMENT - 1)); |
480 | return true; | |
481 | } | |
153c3b50 | 482 | |
69fbc3aa | 483 | *bitposp = 0; |
ceea063b | 484 | *alignp = BITS_PER_UNIT; |
485 | return false; | |
53800dbe | 486 | } |
487 | ||
69fbc3aa | 488 | /* Return the alignment in bits of EXP, a pointer valued expression. |
489 | The alignment returned is, by default, the alignment of the thing that | |
490 | EXP points to. If it is not a POINTER_TYPE, 0 is returned. | |
491 | ||
492 | Otherwise, look at the expression to see if we can do better, i.e., if the | |
493 | expression is actually pointing at an object whose alignment is tighter. */ | |
494 | ||
495 | unsigned int | |
496 | get_pointer_alignment (tree exp) | |
497 | { | |
498 | unsigned HOST_WIDE_INT bitpos = 0; | |
499 | unsigned int align; | |
ceea063b | 500 | |
501 | get_pointer_alignment_1 (exp, &align, &bitpos); | |
69fbc3aa | 502 | |
503 | /* align and bitpos now specify known low bits of the pointer. | |
504 | ptr & (align - 1) == bitpos. */ | |
505 | ||
506 | if (bitpos != 0) | |
ac29ece2 | 507 | align = least_bit_hwi (bitpos); |
69fbc3aa | 508 | |
509 | return align; | |
510 | } | |
511 | ||
c4183f31 | 512 | /* Return the number of leading non-zero elements in the sequence |
c62d63d4 | 513 | [ PTR, PTR + MAXELTS ) where each element's size is ELTSIZE bytes. |
514 | ELTSIZE must be a power of 2 less than 8. Used by c_strlen. */ | |
515 | ||
c4183f31 | 516 | unsigned |
c62d63d4 | 517 | string_length (const void *ptr, unsigned eltsize, unsigned maxelts) |
518 | { | |
519 | gcc_checking_assert (eltsize == 1 || eltsize == 2 || eltsize == 4); | |
520 | ||
521 | unsigned n; | |
522 | ||
523 | if (eltsize == 1) | |
524 | { | |
525 | /* Optimize the common case of plain char. */ | |
526 | for (n = 0; n < maxelts; n++) | |
527 | { | |
528 | const char *elt = (const char*) ptr + n; | |
529 | if (!*elt) | |
530 | break; | |
531 | } | |
532 | } | |
533 | else | |
534 | { | |
535 | for (n = 0; n < maxelts; n++) | |
536 | { | |
537 | const char *elt = (const char*) ptr + n * eltsize; | |
538 | if (!memcmp (elt, "\0\0\0\0", eltsize)) | |
539 | break; | |
540 | } | |
541 | } | |
542 | return n; | |
543 | } | |
544 | ||
7af57b1c | 545 | /* For a call at LOC to a function FN that expects a string in the argument |
546 | ARG, issue a diagnostic due to it being a called with an argument | |
547 | declared at NONSTR that is a character array with no terminating NUL. */ | |
548 | ||
549 | void | |
550 | warn_string_no_nul (location_t loc, const char *fn, tree arg, tree decl) | |
551 | { | |
552 | if (TREE_NO_WARNING (arg)) | |
553 | return; | |
554 | ||
555 | loc = expansion_point_location_if_in_system_header (loc); | |
556 | ||
557 | if (warning_at (loc, OPT_Wstringop_overflow_, | |
558 | "%qs argument missing terminating nul", fn)) | |
559 | { | |
560 | inform (DECL_SOURCE_LOCATION (decl), | |
561 | "referenced argument declared here"); | |
562 | TREE_NO_WARNING (arg) = 1; | |
563 | } | |
564 | } | |
565 | ||
a788aa5f | 566 | /* If EXP refers to an unterminated constant character array return |
567 | the declaration of the object of which the array is a member or | |
fec27bf2 | 568 | element and if SIZE is not null, set *SIZE to the size of |
569 | the unterminated array and set *EXACT if the size is exact or | |
570 | clear it otherwise. Otherwise return null. */ | |
a788aa5f | 571 | |
50e57712 | 572 | tree |
fec27bf2 | 573 | unterminated_array (tree exp, tree *size /* = NULL */, bool *exact /* = NULL */) |
a788aa5f | 574 | { |
fec27bf2 | 575 | /* C_STRLEN will return NULL and set DECL in the info |
576 | structure if EXP references a unterminated array. */ | |
2b84b289 | 577 | c_strlen_data data; |
578 | memset (&data, 0, sizeof (c_strlen_data)); | |
fec27bf2 | 579 | tree len = c_strlen (exp, 1, &data); |
580 | if (len == NULL_TREE && data.len && data.decl) | |
581 | { | |
582 | if (size) | |
583 | { | |
584 | len = data.len; | |
585 | if (data.off) | |
586 | { | |
587 | /* Constant offsets are already accounted for in data.len, but | |
588 | not in a SSA_NAME + CST expression. */ | |
589 | if (TREE_CODE (data.off) == INTEGER_CST) | |
590 | *exact = true; | |
591 | else if (TREE_CODE (data.off) == PLUS_EXPR | |
592 | && TREE_CODE (TREE_OPERAND (data.off, 1)) == INTEGER_CST) | |
593 | { | |
594 | /* Subtract the offset from the size of the array. */ | |
595 | *exact = false; | |
596 | tree temp = TREE_OPERAND (data.off, 1); | |
597 | temp = fold_convert (ssizetype, temp); | |
598 | len = fold_build2 (MINUS_EXPR, ssizetype, len, temp); | |
599 | } | |
600 | else | |
601 | *exact = false; | |
602 | } | |
603 | else | |
604 | *exact = true; | |
605 | ||
606 | *size = len; | |
607 | } | |
608 | return data.decl; | |
609 | } | |
610 | ||
611 | return NULL_TREE; | |
a788aa5f | 612 | } |
613 | ||
c62d63d4 | 614 | /* Compute the length of a null-terminated character string or wide |
615 | character string handling character sizes of 1, 2, and 4 bytes. | |
616 | TREE_STRING_LENGTH is not the right way because it evaluates to | |
617 | the size of the character array in bytes (as opposed to characters) | |
618 | and because it can contain a zero byte in the middle. | |
53800dbe | 619 | |
4172d65e | 620 | ONLY_VALUE should be nonzero if the result is not going to be emitted |
c09841f6 | 621 | into the instruction stream and zero if it is going to be expanded. |
4172d65e | 622 | E.g. with i++ ? "foo" : "bar", if ONLY_VALUE is nonzero, constant 3 |
681fab1e | 623 | is returned, otherwise NULL, since |
624 | len = c_strlen (src, 1); if (len) expand_expr (len, ...); would not | |
625 | evaluate the side-effects. | |
626 | ||
6bda159e | 627 | If ONLY_VALUE is two then we do not emit warnings about out-of-bound |
628 | accesses. Note that this implies the result is not going to be emitted | |
629 | into the instruction stream. | |
630 | ||
2b84b289 | 631 | Additional information about the string accessed may be recorded |
632 | in DATA. For example, if SRC references an unterminated string, | |
633 | then the declaration will be stored in the DECL field. If the | |
634 | length of the unterminated string can be determined, it'll be | |
635 | stored in the LEN field. Note this length could well be different | |
636 | than what a C strlen call would return. | |
7af57b1c | 637 | |
893c4605 | 638 | ELTSIZE is 1 for normal single byte character strings, and 2 or |
639 | 4 for wide characer strings. ELTSIZE is by default 1. | |
902de8ed | 640 | |
893c4605 | 641 | The value returned is of type `ssizetype'. */ |
53800dbe | 642 | |
4ee9c684 | 643 | tree |
2b84b289 | 644 | c_strlen (tree src, int only_value, c_strlen_data *data, unsigned eltsize) |
53800dbe | 645 | { |
2b84b289 | 646 | /* If we were not passed a DATA pointer, then get one to a local |
647 | structure. That avoids having to check DATA for NULL before | |
648 | each time we want to use it. */ | |
649 | c_strlen_data local_strlen_data; | |
650 | memset (&local_strlen_data, 0, sizeof (c_strlen_data)); | |
651 | if (!data) | |
652 | data = &local_strlen_data; | |
653 | ||
2a0aa722 | 654 | gcc_checking_assert (eltsize == 1 || eltsize == 2 || eltsize == 4); |
681fab1e | 655 | STRIP_NOPS (src); |
656 | if (TREE_CODE (src) == COND_EXPR | |
657 | && (only_value || !TREE_SIDE_EFFECTS (TREE_OPERAND (src, 0)))) | |
658 | { | |
659 | tree len1, len2; | |
660 | ||
2b84b289 | 661 | len1 = c_strlen (TREE_OPERAND (src, 1), only_value, data, eltsize); |
662 | len2 = c_strlen (TREE_OPERAND (src, 2), only_value, data, eltsize); | |
0862b7e9 | 663 | if (tree_int_cst_equal (len1, len2)) |
681fab1e | 664 | return len1; |
665 | } | |
666 | ||
667 | if (TREE_CODE (src) == COMPOUND_EXPR | |
668 | && (only_value || !TREE_SIDE_EFFECTS (TREE_OPERAND (src, 0)))) | |
2b84b289 | 669 | return c_strlen (TREE_OPERAND (src, 1), only_value, data, eltsize); |
681fab1e | 670 | |
c62d63d4 | 671 | location_t loc = EXPR_LOC_OR_LOC (src, input_location); |
da136652 | 672 | |
c62d63d4 | 673 | /* Offset from the beginning of the string in bytes. */ |
674 | tree byteoff; | |
893c4605 | 675 | tree memsize; |
7af57b1c | 676 | tree decl; |
677 | src = string_constant (src, &byteoff, &memsize, &decl); | |
53800dbe | 678 | if (src == 0) |
c2f47e15 | 679 | return NULL_TREE; |
902de8ed | 680 | |
c62d63d4 | 681 | /* Determine the size of the string element. */ |
893c4605 | 682 | if (eltsize != tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (src))))) |
683 | return NULL_TREE; | |
c62d63d4 | 684 | |
685 | /* Set MAXELTS to sizeof (SRC) / sizeof (*SRC) - 1, the maximum possible | |
47d2cd73 | 686 | length of SRC. Prefer TYPE_SIZE() to TREE_STRING_LENGTH() if possible |
c4183f31 | 687 | in case the latter is less than the size of the array, such as when |
688 | SRC refers to a short string literal used to initialize a large array. | |
689 | In that case, the elements of the array after the terminating NUL are | |
690 | all NUL. */ | |
691 | HOST_WIDE_INT strelts = TREE_STRING_LENGTH (src); | |
9b7116a1 | 692 | strelts = strelts / eltsize; |
c4183f31 | 693 | |
893c4605 | 694 | if (!tree_fits_uhwi_p (memsize)) |
695 | return NULL_TREE; | |
696 | ||
9b7116a1 | 697 | HOST_WIDE_INT maxelts = tree_to_uhwi (memsize) / eltsize; |
c62d63d4 | 698 | |
699 | /* PTR can point to the byte representation of any string type, including | |
700 | char* and wchar_t*. */ | |
701 | const char *ptr = TREE_STRING_POINTER (src); | |
902de8ed | 702 | |
c62d63d4 | 703 | if (byteoff && TREE_CODE (byteoff) != INTEGER_CST) |
53800dbe | 704 | { |
893c4605 | 705 | /* The code below works only for single byte character types. */ |
706 | if (eltsize != 1) | |
707 | return NULL_TREE; | |
708 | ||
c4183f31 | 709 | /* If the string has an internal NUL character followed by any |
710 | non-NUL characters (e.g., "foo\0bar"), we can't compute | |
711 | the offset to the following NUL if we don't know where to | |
53800dbe | 712 | start searching for it. */ |
c4183f31 | 713 | unsigned len = string_length (ptr, eltsize, strelts); |
902de8ed | 714 | |
2b84b289 | 715 | /* Return when an embedded null character is found or none at all. |
716 | In the latter case, set the DECL/LEN field in the DATA structure | |
717 | so that callers may examine them. */ | |
7af57b1c | 718 | if (len + 1 < strelts) |
893c4605 | 719 | return NULL_TREE; |
7af57b1c | 720 | else if (len >= maxelts) |
721 | { | |
2b84b289 | 722 | data->decl = decl; |
fec27bf2 | 723 | data->off = byteoff; |
2b84b289 | 724 | data->len = ssize_int (len); |
7af57b1c | 725 | return NULL_TREE; |
726 | } | |
d5d661d5 | 727 | |
9b7116a1 | 728 | /* For empty strings the result should be zero. */ |
729 | if (len == 0) | |
730 | return ssize_int (0); | |
731 | ||
53800dbe | 732 | /* We don't know the starting offset, but we do know that the string |
c4183f31 | 733 | has no internal zero bytes. If the offset falls within the bounds |
734 | of the string subtract the offset from the length of the string, | |
735 | and return that. Otherwise the length is zero. Take care to | |
736 | use SAVE_EXPR in case the OFFSET has side-effects. */ | |
f90ef0b2 | 737 | tree offsave = TREE_SIDE_EFFECTS (byteoff) ? save_expr (byteoff) |
738 | : byteoff; | |
739 | offsave = fold_convert_loc (loc, sizetype, offsave); | |
c4183f31 | 740 | tree condexp = fold_build2_loc (loc, LE_EXPR, boolean_type_node, offsave, |
f90ef0b2 | 741 | size_int (len)); |
742 | tree lenexp = fold_build2_loc (loc, MINUS_EXPR, sizetype, size_int (len), | |
743 | offsave); | |
744 | lenexp = fold_convert_loc (loc, ssizetype, lenexp); | |
c4183f31 | 745 | return fold_build3_loc (loc, COND_EXPR, ssizetype, condexp, lenexp, |
746 | build_zero_cst (ssizetype)); | |
53800dbe | 747 | } |
748 | ||
c62d63d4 | 749 | /* Offset from the beginning of the string in elements. */ |
750 | HOST_WIDE_INT eltoff; | |
751 | ||
53800dbe | 752 | /* We have a known offset into the string. Start searching there for |
27d0c333 | 753 | a null character if we can represent it as a single HOST_WIDE_INT. */ |
c62d63d4 | 754 | if (byteoff == 0) |
755 | eltoff = 0; | |
2a0aa722 | 756 | else if (! tree_fits_uhwi_p (byteoff) || tree_to_uhwi (byteoff) % eltsize) |
c62d63d4 | 757 | eltoff = -1; |
53800dbe | 758 | else |
2a0aa722 | 759 | eltoff = tree_to_uhwi (byteoff) / eltsize; |
902de8ed | 760 | |
1f63a7d6 | 761 | /* If the offset is known to be out of bounds, warn, and call strlen at |
762 | runtime. */ | |
9b7116a1 | 763 | if (eltoff < 0 || eltoff >= maxelts) |
53800dbe | 764 | { |
1f63a7d6 | 765 | /* Suppress multiple warnings for propagated constant strings. */ |
2f1c4f17 | 766 | if (only_value != 2 |
767 | && !TREE_NO_WARNING (src)) | |
1f63a7d6 | 768 | { |
d5d661d5 | 769 | warning_at (loc, OPT_Warray_bounds, |
770 | "offset %qwi outside bounds of constant string", | |
c62d63d4 | 771 | eltoff); |
1f63a7d6 | 772 | TREE_NO_WARNING (src) = 1; |
773 | } | |
c2f47e15 | 774 | return NULL_TREE; |
53800dbe | 775 | } |
902de8ed | 776 | |
893c4605 | 777 | /* If eltoff is larger than strelts but less than maxelts the |
778 | string length is zero, since the excess memory will be zero. */ | |
779 | if (eltoff > strelts) | |
780 | return ssize_int (0); | |
781 | ||
53800dbe | 782 | /* Use strlen to search for the first zero byte. Since any strings |
783 | constructed with build_string will have nulls appended, we win even | |
784 | if we get handed something like (char[4])"abcd". | |
785 | ||
c62d63d4 | 786 | Since ELTOFF is our starting index into the string, no further |
53800dbe | 787 | calculation is needed. */ |
c62d63d4 | 788 | unsigned len = string_length (ptr + eltoff * eltsize, eltsize, |
893c4605 | 789 | strelts - eltoff); |
c62d63d4 | 790 | |
9b7116a1 | 791 | /* Don't know what to return if there was no zero termination. |
2b84b289 | 792 | Ideally this would turn into a gcc_checking_assert over time. |
793 | Set DECL/LEN so callers can examine them. */ | |
9b7116a1 | 794 | if (len >= maxelts - eltoff) |
7af57b1c | 795 | { |
2b84b289 | 796 | data->decl = decl; |
fec27bf2 | 797 | data->off = byteoff; |
2b84b289 | 798 | data->len = ssize_int (len); |
7af57b1c | 799 | return NULL_TREE; |
800 | } | |
2a0aa722 | 801 | |
c62d63d4 | 802 | return ssize_int (len); |
53800dbe | 803 | } |
804 | ||
e913b5cd | 805 | /* Return a constant integer corresponding to target reading |
8c85fcb7 | 806 | GET_MODE_BITSIZE (MODE) bits from string constant STR. */ |
ecc318ff | 807 | |
6840589f | 808 | static rtx |
f77c4496 | 809 | c_readstr (const char *str, scalar_int_mode mode) |
6840589f | 810 | { |
6840589f | 811 | HOST_WIDE_INT ch; |
812 | unsigned int i, j; | |
e913b5cd | 813 | HOST_WIDE_INT tmp[MAX_BITSIZE_MODE_ANY_INT / HOST_BITS_PER_WIDE_INT]; |
0407eaee | 814 | |
815 | gcc_assert (GET_MODE_CLASS (mode) == MODE_INT); | |
e913b5cd | 816 | unsigned int len = (GET_MODE_PRECISION (mode) + HOST_BITS_PER_WIDE_INT - 1) |
817 | / HOST_BITS_PER_WIDE_INT; | |
818 | ||
a12aa4cc | 819 | gcc_assert (len <= MAX_BITSIZE_MODE_ANY_INT / HOST_BITS_PER_WIDE_INT); |
e913b5cd | 820 | for (i = 0; i < len; i++) |
821 | tmp[i] = 0; | |
6840589f | 822 | |
6840589f | 823 | ch = 1; |
824 | for (i = 0; i < GET_MODE_SIZE (mode); i++) | |
825 | { | |
826 | j = i; | |
827 | if (WORDS_BIG_ENDIAN) | |
828 | j = GET_MODE_SIZE (mode) - i - 1; | |
829 | if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN | |
ad8f8e52 | 830 | && GET_MODE_SIZE (mode) >= UNITS_PER_WORD) |
6840589f | 831 | j = j + UNITS_PER_WORD - 2 * (j % UNITS_PER_WORD) - 1; |
832 | j *= BITS_PER_UNIT; | |
7d3f6cc7 | 833 | |
6840589f | 834 | if (ch) |
835 | ch = (unsigned char) str[i]; | |
e913b5cd | 836 | tmp[j / HOST_BITS_PER_WIDE_INT] |= ch << (j % HOST_BITS_PER_WIDE_INT); |
6840589f | 837 | } |
ddb1be65 | 838 | |
ab2c1de8 | 839 | wide_int c = wide_int::from_array (tmp, len, GET_MODE_PRECISION (mode)); |
e913b5cd | 840 | return immed_wide_int_const (c, mode); |
6840589f | 841 | } |
842 | ||
ecc318ff | 843 | /* Cast a target constant CST to target CHAR and if that value fits into |
5206b159 | 844 | host char type, return zero and put that value into variable pointed to by |
ecc318ff | 845 | P. */ |
846 | ||
847 | static int | |
aecda0d6 | 848 | target_char_cast (tree cst, char *p) |
ecc318ff | 849 | { |
850 | unsigned HOST_WIDE_INT val, hostval; | |
851 | ||
c19686c5 | 852 | if (TREE_CODE (cst) != INTEGER_CST |
ecc318ff | 853 | || CHAR_TYPE_SIZE > HOST_BITS_PER_WIDE_INT) |
854 | return 1; | |
855 | ||
e913b5cd | 856 | /* Do not care if it fits or not right here. */ |
f9ae6f95 | 857 | val = TREE_INT_CST_LOW (cst); |
e913b5cd | 858 | |
ecc318ff | 859 | if (CHAR_TYPE_SIZE < HOST_BITS_PER_WIDE_INT) |
edc19fd0 | 860 | val &= (HOST_WIDE_INT_1U << CHAR_TYPE_SIZE) - 1; |
ecc318ff | 861 | |
862 | hostval = val; | |
863 | if (HOST_BITS_PER_CHAR < HOST_BITS_PER_WIDE_INT) | |
edc19fd0 | 864 | hostval &= (HOST_WIDE_INT_1U << HOST_BITS_PER_CHAR) - 1; |
ecc318ff | 865 | |
866 | if (val != hostval) | |
867 | return 1; | |
868 | ||
869 | *p = hostval; | |
870 | return 0; | |
871 | } | |
872 | ||
4ee9c684 | 873 | /* Similar to save_expr, but assumes that arbitrary code is not executed |
874 | in between the multiple evaluations. In particular, we assume that a | |
875 | non-addressable local variable will not be modified. */ | |
876 | ||
877 | static tree | |
878 | builtin_save_expr (tree exp) | |
879 | { | |
f6c35aa4 | 880 | if (TREE_CODE (exp) == SSA_NAME |
881 | || (TREE_ADDRESSABLE (exp) == 0 | |
882 | && (TREE_CODE (exp) == PARM_DECL | |
53e9c5c4 | 883 | || (VAR_P (exp) && !TREE_STATIC (exp))))) |
4ee9c684 | 884 | return exp; |
885 | ||
886 | return save_expr (exp); | |
887 | } | |
888 | ||
53800dbe | 889 | /* Given TEM, a pointer to a stack frame, follow the dynamic chain COUNT |
890 | times to get the address of either a higher stack frame, or a return | |
891 | address located within it (depending on FNDECL_CODE). */ | |
902de8ed | 892 | |
c626df3d | 893 | static rtx |
869d0ef0 | 894 | expand_builtin_return_addr (enum built_in_function fndecl_code, int count) |
53800dbe | 895 | { |
896 | int i; | |
869d0ef0 | 897 | rtx tem = INITIAL_FRAME_ADDRESS_RTX; |
3f840859 | 898 | if (tem == NULL_RTX) |
e3e15c50 | 899 | { |
3f840859 | 900 | /* For a zero count with __builtin_return_address, we don't care what |
901 | frame address we return, because target-specific definitions will | |
902 | override us. Therefore frame pointer elimination is OK, and using | |
903 | the soft frame pointer is OK. | |
904 | ||
905 | For a nonzero count, or a zero count with __builtin_frame_address, | |
906 | we require a stable offset from the current frame pointer to the | |
907 | previous one, so we must use the hard frame pointer, and | |
908 | we must disable frame pointer elimination. */ | |
909 | if (count == 0 && fndecl_code == BUILT_IN_RETURN_ADDRESS) | |
910 | tem = frame_pointer_rtx; | |
911 | else | |
912 | { | |
913 | tem = hard_frame_pointer_rtx; | |
e3e15c50 | 914 | |
3f840859 | 915 | /* Tell reload not to eliminate the frame pointer. */ |
916 | crtl->accesses_prior_frames = 1; | |
917 | } | |
e3e15c50 | 918 | } |
869d0ef0 | 919 | |
53800dbe | 920 | if (count > 0) |
921 | SETUP_FRAME_ADDRESSES (); | |
53800dbe | 922 | |
3a69c60c | 923 | /* On the SPARC, the return address is not in the frame, it is in a |
53800dbe | 924 | register. There is no way to access it off of the current frame |
925 | pointer, but it can be accessed off the previous frame pointer by | |
926 | reading the value from the register window save area. */ | |
a26d6c60 | 927 | if (RETURN_ADDR_IN_PREVIOUS_FRAME && fndecl_code == BUILT_IN_RETURN_ADDRESS) |
53800dbe | 928 | count--; |
53800dbe | 929 | |
930 | /* Scan back COUNT frames to the specified frame. */ | |
931 | for (i = 0; i < count; i++) | |
932 | { | |
933 | /* Assume the dynamic chain pointer is in the word that the | |
934 | frame address points to, unless otherwise specified. */ | |
53800dbe | 935 | tem = DYNAMIC_CHAIN_ADDRESS (tem); |
53800dbe | 936 | tem = memory_address (Pmode, tem); |
00060fc2 | 937 | tem = gen_frame_mem (Pmode, tem); |
83fc1478 | 938 | tem = copy_to_reg (tem); |
53800dbe | 939 | } |
940 | ||
3a69c60c | 941 | /* For __builtin_frame_address, return what we've got. But, on |
942 | the SPARC for example, we may have to add a bias. */ | |
53800dbe | 943 | if (fndecl_code == BUILT_IN_FRAME_ADDRESS) |
3a69c60c | 944 | return FRAME_ADDR_RTX (tem); |
53800dbe | 945 | |
3a69c60c | 946 | /* For __builtin_return_address, get the return address from that frame. */ |
53800dbe | 947 | #ifdef RETURN_ADDR_RTX |
948 | tem = RETURN_ADDR_RTX (count, tem); | |
949 | #else | |
950 | tem = memory_address (Pmode, | |
29c05e22 | 951 | plus_constant (Pmode, tem, GET_MODE_SIZE (Pmode))); |
00060fc2 | 952 | tem = gen_frame_mem (Pmode, tem); |
53800dbe | 953 | #endif |
954 | return tem; | |
955 | } | |
956 | ||
f7c44134 | 957 | /* Alias set used for setjmp buffer. */ |
32c2fdea | 958 | static alias_set_type setjmp_alias_set = -1; |
f7c44134 | 959 | |
6b7f6858 | 960 | /* Construct the leading half of a __builtin_setjmp call. Control will |
2c8a1497 | 961 | return to RECEIVER_LABEL. This is also called directly by the SJLJ |
962 | exception handling code. */ | |
53800dbe | 963 | |
6b7f6858 | 964 | void |
aecda0d6 | 965 | expand_builtin_setjmp_setup (rtx buf_addr, rtx receiver_label) |
53800dbe | 966 | { |
3754d046 | 967 | machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); |
53800dbe | 968 | rtx stack_save; |
f7c44134 | 969 | rtx mem; |
53800dbe | 970 | |
f7c44134 | 971 | if (setjmp_alias_set == -1) |
972 | setjmp_alias_set = new_alias_set (); | |
973 | ||
85d654dd | 974 | buf_addr = convert_memory_address (Pmode, buf_addr); |
53800dbe | 975 | |
37ae8504 | 976 | buf_addr = force_reg (Pmode, force_operand (buf_addr, NULL_RTX)); |
53800dbe | 977 | |
6b7f6858 | 978 | /* We store the frame pointer and the address of receiver_label in |
979 | the buffer and use the rest of it for the stack save area, which | |
980 | is machine-dependent. */ | |
53800dbe | 981 | |
f7c44134 | 982 | mem = gen_rtx_MEM (Pmode, buf_addr); |
ab6ab77e | 983 | set_mem_alias_set (mem, setjmp_alias_set); |
e3e026e8 | 984 | emit_move_insn (mem, targetm.builtin_setjmp_frame_value ()); |
f7c44134 | 985 | |
29c05e22 | 986 | mem = gen_rtx_MEM (Pmode, plus_constant (Pmode, buf_addr, |
987 | GET_MODE_SIZE (Pmode))), | |
ab6ab77e | 988 | set_mem_alias_set (mem, setjmp_alias_set); |
f7c44134 | 989 | |
990 | emit_move_insn (validize_mem (mem), | |
6b7f6858 | 991 | force_reg (Pmode, gen_rtx_LABEL_REF (Pmode, receiver_label))); |
53800dbe | 992 | |
993 | stack_save = gen_rtx_MEM (sa_mode, | |
29c05e22 | 994 | plus_constant (Pmode, buf_addr, |
53800dbe | 995 | 2 * GET_MODE_SIZE (Pmode))); |
ab6ab77e | 996 | set_mem_alias_set (stack_save, setjmp_alias_set); |
e9c97615 | 997 | emit_stack_save (SAVE_NONLOCAL, &stack_save); |
53800dbe | 998 | |
999 | /* If there is further processing to do, do it. */ | |
a3c81e61 | 1000 | if (targetm.have_builtin_setjmp_setup ()) |
1001 | emit_insn (targetm.gen_builtin_setjmp_setup (buf_addr)); | |
53800dbe | 1002 | |
29f09705 | 1003 | /* We have a nonlocal label. */ |
18d50ae6 | 1004 | cfun->has_nonlocal_label = 1; |
6b7f6858 | 1005 | } |
53800dbe | 1006 | |
2c8a1497 | 1007 | /* Construct the trailing part of a __builtin_setjmp call. This is |
4598ade9 | 1008 | also called directly by the SJLJ exception handling code. |
1009 | If RECEIVER_LABEL is NULL, instead contruct a nonlocal goto handler. */ | |
6b7f6858 | 1010 | |
1011 | void | |
a3c81e61 | 1012 | expand_builtin_setjmp_receiver (rtx receiver_label) |
6b7f6858 | 1013 | { |
82c7907c | 1014 | rtx chain; |
1015 | ||
4598ade9 | 1016 | /* Mark the FP as used when we get here, so we have to make sure it's |
53800dbe | 1017 | marked as used by this function. */ |
18b42941 | 1018 | emit_use (hard_frame_pointer_rtx); |
53800dbe | 1019 | |
1020 | /* Mark the static chain as clobbered here so life information | |
1021 | doesn't get messed up for it. */ | |
3c56e0c1 | 1022 | chain = rtx_for_static_chain (current_function_decl, true); |
82c7907c | 1023 | if (chain && REG_P (chain)) |
1024 | emit_clobber (chain); | |
53800dbe | 1025 | |
1026 | /* Now put in the code to restore the frame pointer, and argument | |
491e04ef | 1027 | pointer, if needed. */ |
a3c81e61 | 1028 | if (! targetm.have_nonlocal_goto ()) |
62dcb5c8 | 1029 | { |
1030 | /* First adjust our frame pointer to its actual value. It was | |
1031 | previously set to the start of the virtual area corresponding to | |
1032 | the stacked variables when we branched here and now needs to be | |
1033 | adjusted to the actual hardware fp value. | |
1034 | ||
1035 | Assignments to virtual registers are converted by | |
1036 | instantiate_virtual_regs into the corresponding assignment | |
1037 | to the underlying register (fp in this case) that makes | |
1038 | the original assignment true. | |
1039 | So the following insn will actually be decrementing fp by | |
8374586c | 1040 | TARGET_STARTING_FRAME_OFFSET. */ |
62dcb5c8 | 1041 | emit_move_insn (virtual_stack_vars_rtx, hard_frame_pointer_rtx); |
1042 | ||
1043 | /* Restoring the frame pointer also modifies the hard frame pointer. | |
1044 | Mark it used (so that the previous assignment remains live once | |
1045 | the frame pointer is eliminated) and clobbered (to represent the | |
1046 | implicit update from the assignment). */ | |
1047 | emit_use (hard_frame_pointer_rtx); | |
1048 | emit_clobber (hard_frame_pointer_rtx); | |
1049 | } | |
53800dbe | 1050 | |
a494b6d7 | 1051 | if (!HARD_FRAME_POINTER_IS_ARG_POINTER && fixed_regs[ARG_POINTER_REGNUM]) |
53800dbe | 1052 | { |
4598ade9 | 1053 | /* If the argument pointer can be eliminated in favor of the |
1054 | frame pointer, we don't need to restore it. We assume here | |
1055 | that if such an elimination is present, it can always be used. | |
1056 | This is the case on all known machines; if we don't make this | |
1057 | assumption, we do unnecessary saving on many machines. */ | |
53800dbe | 1058 | size_t i; |
e99c3a1d | 1059 | static const struct elims {const int from, to;} elim_regs[] = ELIMINABLE_REGS; |
53800dbe | 1060 | |
3098b2d3 | 1061 | for (i = 0; i < ARRAY_SIZE (elim_regs); i++) |
53800dbe | 1062 | if (elim_regs[i].from == ARG_POINTER_REGNUM |
1063 | && elim_regs[i].to == HARD_FRAME_POINTER_REGNUM) | |
1064 | break; | |
1065 | ||
3098b2d3 | 1066 | if (i == ARRAY_SIZE (elim_regs)) |
53800dbe | 1067 | { |
1068 | /* Now restore our arg pointer from the address at which it | |
05927e40 | 1069 | was saved in our stack frame. */ |
27a7a23a | 1070 | emit_move_insn (crtl->args.internal_arg_pointer, |
b079a207 | 1071 | copy_to_reg (get_arg_pointer_save_area ())); |
53800dbe | 1072 | } |
1073 | } | |
53800dbe | 1074 | |
a3c81e61 | 1075 | if (receiver_label != NULL && targetm.have_builtin_setjmp_receiver ()) |
1076 | emit_insn (targetm.gen_builtin_setjmp_receiver (receiver_label)); | |
1077 | else if (targetm.have_nonlocal_goto_receiver ()) | |
1078 | emit_insn (targetm.gen_nonlocal_goto_receiver ()); | |
53800dbe | 1079 | else |
a3c81e61 | 1080 | { /* Nothing */ } |
57f6bb94 | 1081 | |
3072d30e | 1082 | /* We must not allow the code we just generated to be reordered by |
1083 | scheduling. Specifically, the update of the frame pointer must | |
62dcb5c8 | 1084 | happen immediately, not later. */ |
3072d30e | 1085 | emit_insn (gen_blockage ()); |
6b7f6858 | 1086 | } |
53800dbe | 1087 | |
53800dbe | 1088 | /* __builtin_longjmp is passed a pointer to an array of five words (not |
1089 | all will be used on all machines). It operates similarly to the C | |
1090 | library function of the same name, but is more efficient. Much of | |
2c8a1497 | 1091 | the code below is copied from the handling of non-local gotos. */ |
53800dbe | 1092 | |
c626df3d | 1093 | static void |
aecda0d6 | 1094 | expand_builtin_longjmp (rtx buf_addr, rtx value) |
53800dbe | 1095 | { |
1e0c0b35 | 1096 | rtx fp, lab, stack; |
1097 | rtx_insn *insn, *last; | |
3754d046 | 1098 | machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); |
53800dbe | 1099 | |
48e1416a | 1100 | /* DRAP is needed for stack realign if longjmp is expanded to current |
27a7a23a | 1101 | function */ |
1102 | if (SUPPORTS_STACK_ALIGNMENT) | |
1103 | crtl->need_drap = true; | |
1104 | ||
f7c44134 | 1105 | if (setjmp_alias_set == -1) |
1106 | setjmp_alias_set = new_alias_set (); | |
1107 | ||
85d654dd | 1108 | buf_addr = convert_memory_address (Pmode, buf_addr); |
479e4d5e | 1109 | |
53800dbe | 1110 | buf_addr = force_reg (Pmode, buf_addr); |
1111 | ||
82c7907c | 1112 | /* We require that the user must pass a second argument of 1, because |
1113 | that is what builtin_setjmp will return. */ | |
64db345d | 1114 | gcc_assert (value == const1_rtx); |
53800dbe | 1115 | |
4712c7d6 | 1116 | last = get_last_insn (); |
a3c81e61 | 1117 | if (targetm.have_builtin_longjmp ()) |
1118 | emit_insn (targetm.gen_builtin_longjmp (buf_addr)); | |
53800dbe | 1119 | else |
53800dbe | 1120 | { |
1121 | fp = gen_rtx_MEM (Pmode, buf_addr); | |
29c05e22 | 1122 | lab = gen_rtx_MEM (Pmode, plus_constant (Pmode, buf_addr, |
53800dbe | 1123 | GET_MODE_SIZE (Pmode))); |
1124 | ||
29c05e22 | 1125 | stack = gen_rtx_MEM (sa_mode, plus_constant (Pmode, buf_addr, |
53800dbe | 1126 | 2 * GET_MODE_SIZE (Pmode))); |
ab6ab77e | 1127 | set_mem_alias_set (fp, setjmp_alias_set); |
1128 | set_mem_alias_set (lab, setjmp_alias_set); | |
1129 | set_mem_alias_set (stack, setjmp_alias_set); | |
53800dbe | 1130 | |
1131 | /* Pick up FP, label, and SP from the block and jump. This code is | |
1132 | from expand_goto in stmt.c; see there for detailed comments. */ | |
a3c81e61 | 1133 | if (targetm.have_nonlocal_goto ()) |
53800dbe | 1134 | /* We have to pass a value to the nonlocal_goto pattern that will |
1135 | get copied into the static_chain pointer, but it does not matter | |
1136 | what that value is, because builtin_setjmp does not use it. */ | |
a3c81e61 | 1137 | emit_insn (targetm.gen_nonlocal_goto (value, lab, stack, fp)); |
53800dbe | 1138 | else |
53800dbe | 1139 | { |
1140 | lab = copy_to_reg (lab); | |
1141 | ||
18b42941 | 1142 | emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode))); |
1143 | emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx)); | |
2a871ad1 | 1144 | |
53800dbe | 1145 | emit_move_insn (hard_frame_pointer_rtx, fp); |
e9c97615 | 1146 | emit_stack_restore (SAVE_NONLOCAL, stack); |
53800dbe | 1147 | |
18b42941 | 1148 | emit_use (hard_frame_pointer_rtx); |
1149 | emit_use (stack_pointer_rtx); | |
53800dbe | 1150 | emit_indirect_jump (lab); |
1151 | } | |
1152 | } | |
615166bb | 1153 | |
1154 | /* Search backwards and mark the jump insn as a non-local goto. | |
1155 | Note that this precludes the use of __builtin_longjmp to a | |
1156 | __builtin_setjmp target in the same function. However, we've | |
1157 | already cautioned the user that these functions are for | |
1158 | internal exception handling use only. */ | |
449c0509 | 1159 | for (insn = get_last_insn (); insn; insn = PREV_INSN (insn)) |
1160 | { | |
64db345d | 1161 | gcc_assert (insn != last); |
7d3f6cc7 | 1162 | |
6d7dc5b9 | 1163 | if (JUMP_P (insn)) |
449c0509 | 1164 | { |
a1ddb869 | 1165 | add_reg_note (insn, REG_NON_LOCAL_GOTO, const0_rtx); |
449c0509 | 1166 | break; |
1167 | } | |
6d7dc5b9 | 1168 | else if (CALL_P (insn)) |
9342ee68 | 1169 | break; |
449c0509 | 1170 | } |
53800dbe | 1171 | } |
1172 | ||
0e80b01d | 1173 | static inline bool |
1174 | more_const_call_expr_args_p (const const_call_expr_arg_iterator *iter) | |
1175 | { | |
1176 | return (iter->i < iter->n); | |
1177 | } | |
1178 | ||
1179 | /* This function validates the types of a function call argument list | |
1180 | against a specified list of tree_codes. If the last specifier is a 0, | |
5cfa3fc8 | 1181 | that represents an ellipsis, otherwise the last specifier must be a |
0e80b01d | 1182 | VOID_TYPE. */ |
1183 | ||
1184 | static bool | |
1185 | validate_arglist (const_tree callexpr, ...) | |
1186 | { | |
1187 | enum tree_code code; | |
1188 | bool res = 0; | |
1189 | va_list ap; | |
1190 | const_call_expr_arg_iterator iter; | |
1191 | const_tree arg; | |
1192 | ||
1193 | va_start (ap, callexpr); | |
1194 | init_const_call_expr_arg_iterator (callexpr, &iter); | |
1195 | ||
5cfa3fc8 | 1196 | /* Get a bitmap of pointer argument numbers declared attribute nonnull. */ |
184fac50 | 1197 | tree fn = CALL_EXPR_FN (callexpr); |
1198 | bitmap argmap = get_nonnull_args (TREE_TYPE (TREE_TYPE (fn))); | |
5cfa3fc8 | 1199 | |
1200 | for (unsigned argno = 1; ; ++argno) | |
0e80b01d | 1201 | { |
1202 | code = (enum tree_code) va_arg (ap, int); | |
5cfa3fc8 | 1203 | |
0e80b01d | 1204 | switch (code) |
1205 | { | |
1206 | case 0: | |
1207 | /* This signifies an ellipses, any further arguments are all ok. */ | |
1208 | res = true; | |
1209 | goto end; | |
1210 | case VOID_TYPE: | |
1211 | /* This signifies an endlink, if no arguments remain, return | |
1212 | true, otherwise return false. */ | |
1213 | res = !more_const_call_expr_args_p (&iter); | |
1214 | goto end; | |
5cfa3fc8 | 1215 | case POINTER_TYPE: |
1216 | /* The actual argument must be nonnull when either the whole | |
1217 | called function has been declared nonnull, or when the formal | |
1218 | argument corresponding to the actual argument has been. */ | |
184fac50 | 1219 | if (argmap |
1220 | && (bitmap_empty_p (argmap) || bitmap_bit_p (argmap, argno))) | |
1221 | { | |
1222 | arg = next_const_call_expr_arg (&iter); | |
1223 | if (!validate_arg (arg, code) || integer_zerop (arg)) | |
1224 | goto end; | |
1225 | break; | |
1226 | } | |
5cfa3fc8 | 1227 | /* FALLTHRU */ |
0e80b01d | 1228 | default: |
1229 | /* If no parameters remain or the parameter's code does not | |
1230 | match the specified code, return false. Otherwise continue | |
1231 | checking any remaining arguments. */ | |
1232 | arg = next_const_call_expr_arg (&iter); | |
184fac50 | 1233 | if (!validate_arg (arg, code)) |
0e80b01d | 1234 | goto end; |
1235 | break; | |
1236 | } | |
1237 | } | |
0e80b01d | 1238 | |
1239 | /* We need gotos here since we can only have one VA_CLOSE in a | |
1240 | function. */ | |
1241 | end: ; | |
1242 | va_end (ap); | |
1243 | ||
5cfa3fc8 | 1244 | BITMAP_FREE (argmap); |
1245 | ||
0e80b01d | 1246 | return res; |
1247 | } | |
1248 | ||
4ee9c684 | 1249 | /* Expand a call to __builtin_nonlocal_goto. We're passed the target label |
1250 | and the address of the save area. */ | |
1251 | ||
1252 | static rtx | |
c2f47e15 | 1253 | expand_builtin_nonlocal_goto (tree exp) |
4ee9c684 | 1254 | { |
1255 | tree t_label, t_save_area; | |
1e0c0b35 | 1256 | rtx r_label, r_save_area, r_fp, r_sp; |
1257 | rtx_insn *insn; | |
4ee9c684 | 1258 | |
c2f47e15 | 1259 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
4ee9c684 | 1260 | return NULL_RTX; |
1261 | ||
c2f47e15 | 1262 | t_label = CALL_EXPR_ARG (exp, 0); |
1263 | t_save_area = CALL_EXPR_ARG (exp, 1); | |
4ee9c684 | 1264 | |
8ec3c5c2 | 1265 | r_label = expand_normal (t_label); |
3dce56cc | 1266 | r_label = convert_memory_address (Pmode, r_label); |
8ec3c5c2 | 1267 | r_save_area = expand_normal (t_save_area); |
3dce56cc | 1268 | r_save_area = convert_memory_address (Pmode, r_save_area); |
d1ff492e | 1269 | /* Copy the address of the save location to a register just in case it was |
1270 | based on the frame pointer. */ | |
51adbc8a | 1271 | r_save_area = copy_to_reg (r_save_area); |
4ee9c684 | 1272 | r_fp = gen_rtx_MEM (Pmode, r_save_area); |
1273 | r_sp = gen_rtx_MEM (STACK_SAVEAREA_MODE (SAVE_NONLOCAL), | |
29c05e22 | 1274 | plus_constant (Pmode, r_save_area, |
1275 | GET_MODE_SIZE (Pmode))); | |
4ee9c684 | 1276 | |
18d50ae6 | 1277 | crtl->has_nonlocal_goto = 1; |
4ee9c684 | 1278 | |
4ee9c684 | 1279 | /* ??? We no longer need to pass the static chain value, afaik. */ |
a3c81e61 | 1280 | if (targetm.have_nonlocal_goto ()) |
1281 | emit_insn (targetm.gen_nonlocal_goto (const0_rtx, r_label, r_sp, r_fp)); | |
4ee9c684 | 1282 | else |
4ee9c684 | 1283 | { |
1284 | r_label = copy_to_reg (r_label); | |
1285 | ||
18b42941 | 1286 | emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode))); |
1287 | emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx)); | |
491e04ef | 1288 | |
d1ff492e | 1289 | /* Restore frame pointer for containing function. */ |
4ee9c684 | 1290 | emit_move_insn (hard_frame_pointer_rtx, r_fp); |
e9c97615 | 1291 | emit_stack_restore (SAVE_NONLOCAL, r_sp); |
491e04ef | 1292 | |
4ee9c684 | 1293 | /* USE of hard_frame_pointer_rtx added for consistency; |
1294 | not clear if really needed. */ | |
18b42941 | 1295 | emit_use (hard_frame_pointer_rtx); |
1296 | emit_use (stack_pointer_rtx); | |
ad0d0af8 | 1297 | |
1298 | /* If the architecture is using a GP register, we must | |
1299 | conservatively assume that the target function makes use of it. | |
1300 | The prologue of functions with nonlocal gotos must therefore | |
1301 | initialize the GP register to the appropriate value, and we | |
1302 | must then make sure that this value is live at the point | |
1303 | of the jump. (Note that this doesn't necessarily apply | |
1304 | to targets with a nonlocal_goto pattern; they are free | |
1305 | to implement it in their own way. Note also that this is | |
1306 | a no-op if the GP register is a global invariant.) */ | |
1e826931 | 1307 | unsigned regnum = PIC_OFFSET_TABLE_REGNUM; |
1308 | if (regnum != INVALID_REGNUM && fixed_regs[regnum]) | |
18b42941 | 1309 | emit_use (pic_offset_table_rtx); |
ad0d0af8 | 1310 | |
4ee9c684 | 1311 | emit_indirect_jump (r_label); |
1312 | } | |
491e04ef | 1313 | |
4ee9c684 | 1314 | /* Search backwards to the jump insn and mark it as a |
1315 | non-local goto. */ | |
1316 | for (insn = get_last_insn (); insn; insn = PREV_INSN (insn)) | |
1317 | { | |
6d7dc5b9 | 1318 | if (JUMP_P (insn)) |
4ee9c684 | 1319 | { |
a1ddb869 | 1320 | add_reg_note (insn, REG_NON_LOCAL_GOTO, const0_rtx); |
4ee9c684 | 1321 | break; |
1322 | } | |
6d7dc5b9 | 1323 | else if (CALL_P (insn)) |
4ee9c684 | 1324 | break; |
1325 | } | |
1326 | ||
1327 | return const0_rtx; | |
1328 | } | |
1329 | ||
843d08a9 | 1330 | /* __builtin_update_setjmp_buf is passed a pointer to an array of five words |
1331 | (not all will be used on all machines) that was passed to __builtin_setjmp. | |
97354ae4 | 1332 | It updates the stack pointer in that block to the current value. This is |
1333 | also called directly by the SJLJ exception handling code. */ | |
843d08a9 | 1334 | |
97354ae4 | 1335 | void |
843d08a9 | 1336 | expand_builtin_update_setjmp_buf (rtx buf_addr) |
1337 | { | |
3754d046 | 1338 | machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); |
77e843a0 | 1339 | buf_addr = convert_memory_address (Pmode, buf_addr); |
d1ff492e | 1340 | rtx stack_save |
843d08a9 | 1341 | = gen_rtx_MEM (sa_mode, |
1342 | memory_address | |
1343 | (sa_mode, | |
29c05e22 | 1344 | plus_constant (Pmode, buf_addr, |
1345 | 2 * GET_MODE_SIZE (Pmode)))); | |
843d08a9 | 1346 | |
e9c97615 | 1347 | emit_stack_save (SAVE_NONLOCAL, &stack_save); |
843d08a9 | 1348 | } |
1349 | ||
5e3608d8 | 1350 | /* Expand a call to __builtin_prefetch. For a target that does not support |
1351 | data prefetch, evaluate the memory address argument in case it has side | |
1352 | effects. */ | |
1353 | ||
1354 | static void | |
c2f47e15 | 1355 | expand_builtin_prefetch (tree exp) |
5e3608d8 | 1356 | { |
1357 | tree arg0, arg1, arg2; | |
c2f47e15 | 1358 | int nargs; |
5e3608d8 | 1359 | rtx op0, op1, op2; |
1360 | ||
c2f47e15 | 1361 | if (!validate_arglist (exp, POINTER_TYPE, 0)) |
26a5cadb | 1362 | return; |
1363 | ||
c2f47e15 | 1364 | arg0 = CALL_EXPR_ARG (exp, 0); |
1365 | ||
26a5cadb | 1366 | /* Arguments 1 and 2 are optional; argument 1 (read/write) defaults to |
1367 | zero (read) and argument 2 (locality) defaults to 3 (high degree of | |
1368 | locality). */ | |
c2f47e15 | 1369 | nargs = call_expr_nargs (exp); |
1370 | if (nargs > 1) | |
1371 | arg1 = CALL_EXPR_ARG (exp, 1); | |
26a5cadb | 1372 | else |
c2f47e15 | 1373 | arg1 = integer_zero_node; |
1374 | if (nargs > 2) | |
1375 | arg2 = CALL_EXPR_ARG (exp, 2); | |
1376 | else | |
2512209b | 1377 | arg2 = integer_three_node; |
5e3608d8 | 1378 | |
1379 | /* Argument 0 is an address. */ | |
1380 | op0 = expand_expr (arg0, NULL_RTX, Pmode, EXPAND_NORMAL); | |
1381 | ||
1382 | /* Argument 1 (read/write flag) must be a compile-time constant int. */ | |
1383 | if (TREE_CODE (arg1) != INTEGER_CST) | |
1384 | { | |
07e3a3d2 | 1385 | error ("second argument to %<__builtin_prefetch%> must be a constant"); |
9342ee68 | 1386 | arg1 = integer_zero_node; |
5e3608d8 | 1387 | } |
8ec3c5c2 | 1388 | op1 = expand_normal (arg1); |
5e3608d8 | 1389 | /* Argument 1 must be either zero or one. */ |
1390 | if (INTVAL (op1) != 0 && INTVAL (op1) != 1) | |
1391 | { | |
c3ceba8e | 1392 | warning (0, "invalid second argument to %<__builtin_prefetch%>;" |
07e3a3d2 | 1393 | " using zero"); |
5e3608d8 | 1394 | op1 = const0_rtx; |
1395 | } | |
1396 | ||
1397 | /* Argument 2 (locality) must be a compile-time constant int. */ | |
1398 | if (TREE_CODE (arg2) != INTEGER_CST) | |
1399 | { | |
07e3a3d2 | 1400 | error ("third argument to %<__builtin_prefetch%> must be a constant"); |
5e3608d8 | 1401 | arg2 = integer_zero_node; |
1402 | } | |
8ec3c5c2 | 1403 | op2 = expand_normal (arg2); |
5e3608d8 | 1404 | /* Argument 2 must be 0, 1, 2, or 3. */ |
1405 | if (INTVAL (op2) < 0 || INTVAL (op2) > 3) | |
1406 | { | |
c3ceba8e | 1407 | warning (0, "invalid third argument to %<__builtin_prefetch%>; using zero"); |
5e3608d8 | 1408 | op2 = const0_rtx; |
1409 | } | |
1410 | ||
1d375a79 | 1411 | if (targetm.have_prefetch ()) |
5e3608d8 | 1412 | { |
8786db1e | 1413 | struct expand_operand ops[3]; |
1414 | ||
1415 | create_address_operand (&ops[0], op0); | |
1416 | create_integer_operand (&ops[1], INTVAL (op1)); | |
1417 | create_integer_operand (&ops[2], INTVAL (op2)); | |
1d375a79 | 1418 | if (maybe_expand_insn (targetm.code_for_prefetch, 3, ops)) |
8786db1e | 1419 | return; |
5e3608d8 | 1420 | } |
0a534ba7 | 1421 | |
f0ce3b1f | 1422 | /* Don't do anything with direct references to volatile memory, but |
1423 | generate code to handle other side effects. */ | |
e16ceb8e | 1424 | if (!MEM_P (op0) && side_effects_p (op0)) |
f0ce3b1f | 1425 | emit_insn (op0); |
5e3608d8 | 1426 | } |
1427 | ||
f7c44134 | 1428 | /* Get a MEM rtx for expression EXP which is the address of an operand |
d8ae1baa | 1429 | to be used in a string instruction (cmpstrsi, movmemsi, ..). LEN is |
1430 | the maximum length of the block of memory that might be accessed or | |
1431 | NULL if unknown. */ | |
f7c44134 | 1432 | |
53800dbe | 1433 | static rtx |
d8ae1baa | 1434 | get_memory_rtx (tree exp, tree len) |
53800dbe | 1435 | { |
ad0a178f | 1436 | tree orig_exp = exp; |
1437 | rtx addr, mem; | |
ad0a178f | 1438 | |
1439 | /* When EXP is not resolved SAVE_EXPR, MEM_ATTRS can be still derived | |
1440 | from its expression, for expr->a.b only <variable>.a.b is recorded. */ | |
1441 | if (TREE_CODE (exp) == SAVE_EXPR && !SAVE_EXPR_RESOLVED_P (exp)) | |
1442 | exp = TREE_OPERAND (exp, 0); | |
1443 | ||
1444 | addr = expand_expr (orig_exp, NULL_RTX, ptr_mode, EXPAND_NORMAL); | |
1445 | mem = gen_rtx_MEM (BLKmode, memory_address (BLKmode, addr)); | |
2a631e19 | 1446 | |
f7c44134 | 1447 | /* Get an expression we can use to find the attributes to assign to MEM. |
5dd3f78f | 1448 | First remove any nops. */ |
72dd6141 | 1449 | while (CONVERT_EXPR_P (exp) |
f7c44134 | 1450 | && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
1451 | exp = TREE_OPERAND (exp, 0); | |
1452 | ||
5dd3f78f | 1453 | /* Build a MEM_REF representing the whole accessed area as a byte blob, |
1454 | (as builtin stringops may alias with anything). */ | |
1455 | exp = fold_build2 (MEM_REF, | |
1456 | build_array_type (char_type_node, | |
1457 | build_range_type (sizetype, | |
1458 | size_one_node, len)), | |
1459 | exp, build_int_cst (ptr_type_node, 0)); | |
1460 | ||
1461 | /* If the MEM_REF has no acceptable address, try to get the base object | |
1462 | from the original address we got, and build an all-aliasing | |
1463 | unknown-sized access to that one. */ | |
1464 | if (is_gimple_mem_ref_addr (TREE_OPERAND (exp, 0))) | |
1465 | set_mem_attributes (mem, exp, 0); | |
1466 | else if (TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR | |
1467 | && (exp = get_base_address (TREE_OPERAND (TREE_OPERAND (exp, 0), | |
1468 | 0)))) | |
eec8e941 | 1469 | { |
5dd3f78f | 1470 | exp = build_fold_addr_expr (exp); |
1471 | exp = fold_build2 (MEM_REF, | |
1472 | build_array_type (char_type_node, | |
1473 | build_range_type (sizetype, | |
1474 | size_zero_node, | |
1475 | NULL)), | |
1476 | exp, build_int_cst (ptr_type_node, 0)); | |
a1a25d19 | 1477 | set_mem_attributes (mem, exp, 0); |
eec8e941 | 1478 | } |
5dd3f78f | 1479 | set_mem_alias_set (mem, 0); |
53800dbe | 1480 | return mem; |
1481 | } | |
1482 | \f | |
1483 | /* Built-in functions to perform an untyped call and return. */ | |
1484 | ||
3b9c3a16 | 1485 | #define apply_args_mode \ |
1486 | (this_target_builtins->x_apply_args_mode) | |
1487 | #define apply_result_mode \ | |
1488 | (this_target_builtins->x_apply_result_mode) | |
53800dbe | 1489 | |
53800dbe | 1490 | /* Return the size required for the block returned by __builtin_apply_args, |
1491 | and initialize apply_args_mode. */ | |
1492 | ||
1493 | static int | |
aecda0d6 | 1494 | apply_args_size (void) |
53800dbe | 1495 | { |
1496 | static int size = -1; | |
58e9ce8f | 1497 | int align; |
1498 | unsigned int regno; | |
53800dbe | 1499 | |
1500 | /* The values computed by this function never change. */ | |
1501 | if (size < 0) | |
1502 | { | |
1503 | /* The first value is the incoming arg-pointer. */ | |
1504 | size = GET_MODE_SIZE (Pmode); | |
1505 | ||
1506 | /* The second value is the structure value address unless this is | |
1507 | passed as an "invisible" first argument. */ | |
6812c89e | 1508 | if (targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0)) |
53800dbe | 1509 | size += GET_MODE_SIZE (Pmode); |
1510 | ||
1511 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1512 | if (FUNCTION_ARG_REGNO_P (regno)) | |
1513 | { | |
d8ba6ec1 | 1514 | fixed_size_mode mode = targetm.calls.get_raw_arg_mode (regno); |
0862b7e9 | 1515 | |
64db345d | 1516 | gcc_assert (mode != VOIDmode); |
53800dbe | 1517 | |
1518 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1519 | if (size % align != 0) | |
1520 | size = CEIL (size, align) * align; | |
53800dbe | 1521 | size += GET_MODE_SIZE (mode); |
1522 | apply_args_mode[regno] = mode; | |
1523 | } | |
1524 | else | |
1525 | { | |
d8ba6ec1 | 1526 | apply_args_mode[regno] = as_a <fixed_size_mode> (VOIDmode); |
53800dbe | 1527 | } |
1528 | } | |
1529 | return size; | |
1530 | } | |
1531 | ||
1532 | /* Return the size required for the block returned by __builtin_apply, | |
1533 | and initialize apply_result_mode. */ | |
1534 | ||
1535 | static int | |
aecda0d6 | 1536 | apply_result_size (void) |
53800dbe | 1537 | { |
1538 | static int size = -1; | |
1539 | int align, regno; | |
53800dbe | 1540 | |
1541 | /* The values computed by this function never change. */ | |
1542 | if (size < 0) | |
1543 | { | |
1544 | size = 0; | |
1545 | ||
1546 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
e1ce1485 | 1547 | if (targetm.calls.function_value_regno_p (regno)) |
53800dbe | 1548 | { |
d8ba6ec1 | 1549 | fixed_size_mode mode = targetm.calls.get_raw_result_mode (regno); |
0862b7e9 | 1550 | |
64db345d | 1551 | gcc_assert (mode != VOIDmode); |
53800dbe | 1552 | |
1553 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1554 | if (size % align != 0) | |
1555 | size = CEIL (size, align) * align; | |
1556 | size += GET_MODE_SIZE (mode); | |
1557 | apply_result_mode[regno] = mode; | |
1558 | } | |
1559 | else | |
d8ba6ec1 | 1560 | apply_result_mode[regno] = as_a <fixed_size_mode> (VOIDmode); |
53800dbe | 1561 | |
1562 | /* Allow targets that use untyped_call and untyped_return to override | |
1563 | the size so that machine-specific information can be stored here. */ | |
1564 | #ifdef APPLY_RESULT_SIZE | |
1565 | size = APPLY_RESULT_SIZE; | |
1566 | #endif | |
1567 | } | |
1568 | return size; | |
1569 | } | |
1570 | ||
53800dbe | 1571 | /* Create a vector describing the result block RESULT. If SAVEP is true, |
1572 | the result block is used to save the values; otherwise it is used to | |
1573 | restore the values. */ | |
1574 | ||
1575 | static rtx | |
aecda0d6 | 1576 | result_vector (int savep, rtx result) |
53800dbe | 1577 | { |
1578 | int regno, size, align, nelts; | |
d8ba6ec1 | 1579 | fixed_size_mode mode; |
53800dbe | 1580 | rtx reg, mem; |
364c0c59 | 1581 | rtx *savevec = XALLOCAVEC (rtx, FIRST_PSEUDO_REGISTER); |
bf8e3599 | 1582 | |
53800dbe | 1583 | size = nelts = 0; |
1584 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1585 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
1586 | { | |
1587 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1588 | if (size % align != 0) | |
1589 | size = CEIL (size, align) * align; | |
1590 | reg = gen_rtx_REG (mode, savep ? regno : INCOMING_REGNO (regno)); | |
e513d163 | 1591 | mem = adjust_address (result, mode, size); |
53800dbe | 1592 | savevec[nelts++] = (savep |
d1f9b275 | 1593 | ? gen_rtx_SET (mem, reg) |
1594 | : gen_rtx_SET (reg, mem)); | |
53800dbe | 1595 | size += GET_MODE_SIZE (mode); |
1596 | } | |
1597 | return gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (nelts, savevec)); | |
1598 | } | |
53800dbe | 1599 | |
1600 | /* Save the state required to perform an untyped call with the same | |
1601 | arguments as were passed to the current function. */ | |
1602 | ||
1603 | static rtx | |
aecda0d6 | 1604 | expand_builtin_apply_args_1 (void) |
53800dbe | 1605 | { |
1c7e61a7 | 1606 | rtx registers, tem; |
53800dbe | 1607 | int size, align, regno; |
d8ba6ec1 | 1608 | fixed_size_mode mode; |
6812c89e | 1609 | rtx struct_incoming_value = targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 1); |
53800dbe | 1610 | |
1611 | /* Create a block where the arg-pointer, structure value address, | |
1612 | and argument registers can be saved. */ | |
1613 | registers = assign_stack_local (BLKmode, apply_args_size (), -1); | |
1614 | ||
1615 | /* Walk past the arg-pointer and structure value address. */ | |
1616 | size = GET_MODE_SIZE (Pmode); | |
6812c89e | 1617 | if (targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0)) |
53800dbe | 1618 | size += GET_MODE_SIZE (Pmode); |
1619 | ||
1620 | /* Save each register used in calling a function to the block. */ | |
1621 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1622 | if ((mode = apply_args_mode[regno]) != VOIDmode) | |
1623 | { | |
53800dbe | 1624 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; |
1625 | if (size % align != 0) | |
1626 | size = CEIL (size, align) * align; | |
1627 | ||
1628 | tem = gen_rtx_REG (mode, INCOMING_REGNO (regno)); | |
1629 | ||
e513d163 | 1630 | emit_move_insn (adjust_address (registers, mode, size), tem); |
53800dbe | 1631 | size += GET_MODE_SIZE (mode); |
1632 | } | |
1633 | ||
1634 | /* Save the arg pointer to the block. */ | |
27a7a23a | 1635 | tem = copy_to_reg (crtl->args.internal_arg_pointer); |
1c7e61a7 | 1636 | /* We need the pointer as the caller actually passed them to us, not |
9d4b544c | 1637 | as we might have pretended they were passed. Make sure it's a valid |
1638 | operand, as emit_move_insn isn't expected to handle a PLUS. */ | |
3764c94e | 1639 | if (STACK_GROWS_DOWNWARD) |
1640 | tem | |
1641 | = force_operand (plus_constant (Pmode, tem, | |
1642 | crtl->args.pretend_args_size), | |
1643 | NULL_RTX); | |
1c7e61a7 | 1644 | emit_move_insn (adjust_address (registers, Pmode, 0), tem); |
0862b7e9 | 1645 | |
53800dbe | 1646 | size = GET_MODE_SIZE (Pmode); |
1647 | ||
1648 | /* Save the structure value address unless this is passed as an | |
1649 | "invisible" first argument. */ | |
45550790 | 1650 | if (struct_incoming_value) |
53800dbe | 1651 | { |
e513d163 | 1652 | emit_move_insn (adjust_address (registers, Pmode, size), |
45550790 | 1653 | copy_to_reg (struct_incoming_value)); |
53800dbe | 1654 | size += GET_MODE_SIZE (Pmode); |
1655 | } | |
1656 | ||
1657 | /* Return the address of the block. */ | |
1658 | return copy_addr_to_reg (XEXP (registers, 0)); | |
1659 | } | |
1660 | ||
1661 | /* __builtin_apply_args returns block of memory allocated on | |
1662 | the stack into which is stored the arg pointer, structure | |
1663 | value address, static chain, and all the registers that might | |
1664 | possibly be used in performing a function call. The code is | |
1665 | moved to the start of the function so the incoming values are | |
1666 | saved. */ | |
27d0c333 | 1667 | |
53800dbe | 1668 | static rtx |
aecda0d6 | 1669 | expand_builtin_apply_args (void) |
53800dbe | 1670 | { |
1671 | /* Don't do __builtin_apply_args more than once in a function. | |
1672 | Save the result of the first call and reuse it. */ | |
1673 | if (apply_args_value != 0) | |
1674 | return apply_args_value; | |
1675 | { | |
1676 | /* When this function is called, it means that registers must be | |
1677 | saved on entry to this function. So we migrate the | |
1678 | call to the first insn of this function. */ | |
1679 | rtx temp; | |
53800dbe | 1680 | |
1681 | start_sequence (); | |
1682 | temp = expand_builtin_apply_args_1 (); | |
9ed997be | 1683 | rtx_insn *seq = get_insns (); |
53800dbe | 1684 | end_sequence (); |
1685 | ||
1686 | apply_args_value = temp; | |
1687 | ||
31d3e01c | 1688 | /* Put the insns after the NOTE that starts the function. |
1689 | If this is inside a start_sequence, make the outer-level insn | |
53800dbe | 1690 | chain current, so the code is placed at the start of the |
0ef1a651 | 1691 | function. If internal_arg_pointer is a non-virtual pseudo, |
1692 | it needs to be placed after the function that initializes | |
1693 | that pseudo. */ | |
53800dbe | 1694 | push_topmost_sequence (); |
0ef1a651 | 1695 | if (REG_P (crtl->args.internal_arg_pointer) |
1696 | && REGNO (crtl->args.internal_arg_pointer) > LAST_VIRTUAL_REGISTER) | |
1697 | emit_insn_before (seq, parm_birth_insn); | |
1698 | else | |
1699 | emit_insn_before (seq, NEXT_INSN (entry_of_function ())); | |
53800dbe | 1700 | pop_topmost_sequence (); |
1701 | return temp; | |
1702 | } | |
1703 | } | |
1704 | ||
1705 | /* Perform an untyped call and save the state required to perform an | |
1706 | untyped return of whatever value was returned by the given function. */ | |
1707 | ||
1708 | static rtx | |
aecda0d6 | 1709 | expand_builtin_apply (rtx function, rtx arguments, rtx argsize) |
53800dbe | 1710 | { |
1711 | int size, align, regno; | |
d8ba6ec1 | 1712 | fixed_size_mode mode; |
1e0c0b35 | 1713 | rtx incoming_args, result, reg, dest, src; |
1714 | rtx_call_insn *call_insn; | |
53800dbe | 1715 | rtx old_stack_level = 0; |
1716 | rtx call_fusage = 0; | |
6812c89e | 1717 | rtx struct_value = targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0); |
53800dbe | 1718 | |
85d654dd | 1719 | arguments = convert_memory_address (Pmode, arguments); |
726ec87c | 1720 | |
53800dbe | 1721 | /* Create a block where the return registers can be saved. */ |
1722 | result = assign_stack_local (BLKmode, apply_result_size (), -1); | |
1723 | ||
53800dbe | 1724 | /* Fetch the arg pointer from the ARGUMENTS block. */ |
1725 | incoming_args = gen_reg_rtx (Pmode); | |
726ec87c | 1726 | emit_move_insn (incoming_args, gen_rtx_MEM (Pmode, arguments)); |
3764c94e | 1727 | if (!STACK_GROWS_DOWNWARD) |
1728 | incoming_args = expand_simple_binop (Pmode, MINUS, incoming_args, argsize, | |
1729 | incoming_args, 0, OPTAB_LIB_WIDEN); | |
53800dbe | 1730 | |
04a46d40 | 1731 | /* Push a new argument block and copy the arguments. Do not allow |
1732 | the (potential) memcpy call below to interfere with our stack | |
1733 | manipulations. */ | |
53800dbe | 1734 | do_pending_stack_adjust (); |
04a46d40 | 1735 | NO_DEFER_POP; |
53800dbe | 1736 | |
2358393e | 1737 | /* Save the stack with nonlocal if available. */ |
71512c05 | 1738 | if (targetm.have_save_stack_nonlocal ()) |
e9c97615 | 1739 | emit_stack_save (SAVE_NONLOCAL, &old_stack_level); |
53800dbe | 1740 | else |
e9c97615 | 1741 | emit_stack_save (SAVE_BLOCK, &old_stack_level); |
53800dbe | 1742 | |
59647703 | 1743 | /* Allocate a block of memory onto the stack and copy the memory |
990495a7 | 1744 | arguments to the outgoing arguments address. We can pass TRUE |
1745 | as the 4th argument because we just saved the stack pointer | |
1746 | and will restore it right after the call. */ | |
2b34677f | 1747 | allocate_dynamic_stack_space (argsize, 0, BIGGEST_ALIGNMENT, -1, true); |
27a7a23a | 1748 | |
1749 | /* Set DRAP flag to true, even though allocate_dynamic_stack_space | |
1750 | may have already set current_function_calls_alloca to true. | |
1751 | current_function_calls_alloca won't be set if argsize is zero, | |
1752 | so we have to guarantee need_drap is true here. */ | |
1753 | if (SUPPORTS_STACK_ALIGNMENT) | |
1754 | crtl->need_drap = true; | |
1755 | ||
59647703 | 1756 | dest = virtual_outgoing_args_rtx; |
3764c94e | 1757 | if (!STACK_GROWS_DOWNWARD) |
1758 | { | |
1759 | if (CONST_INT_P (argsize)) | |
1760 | dest = plus_constant (Pmode, dest, -INTVAL (argsize)); | |
1761 | else | |
1762 | dest = gen_rtx_PLUS (Pmode, dest, negate_rtx (Pmode, argsize)); | |
1763 | } | |
2a631e19 | 1764 | dest = gen_rtx_MEM (BLKmode, dest); |
1765 | set_mem_align (dest, PARM_BOUNDARY); | |
1766 | src = gen_rtx_MEM (BLKmode, incoming_args); | |
1767 | set_mem_align (src, PARM_BOUNDARY); | |
0378dbdc | 1768 | emit_block_move (dest, src, argsize, BLOCK_OP_NORMAL); |
53800dbe | 1769 | |
1770 | /* Refer to the argument block. */ | |
1771 | apply_args_size (); | |
1772 | arguments = gen_rtx_MEM (BLKmode, arguments); | |
2a631e19 | 1773 | set_mem_align (arguments, PARM_BOUNDARY); |
53800dbe | 1774 | |
1775 | /* Walk past the arg-pointer and structure value address. */ | |
1776 | size = GET_MODE_SIZE (Pmode); | |
45550790 | 1777 | if (struct_value) |
53800dbe | 1778 | size += GET_MODE_SIZE (Pmode); |
1779 | ||
1780 | /* Restore each of the registers previously saved. Make USE insns | |
1781 | for each of these registers for use in making the call. */ | |
1782 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1783 | if ((mode = apply_args_mode[regno]) != VOIDmode) | |
1784 | { | |
1785 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1786 | if (size % align != 0) | |
1787 | size = CEIL (size, align) * align; | |
1788 | reg = gen_rtx_REG (mode, regno); | |
e513d163 | 1789 | emit_move_insn (reg, adjust_address (arguments, mode, size)); |
53800dbe | 1790 | use_reg (&call_fusage, reg); |
1791 | size += GET_MODE_SIZE (mode); | |
1792 | } | |
1793 | ||
1794 | /* Restore the structure value address unless this is passed as an | |
1795 | "invisible" first argument. */ | |
1796 | size = GET_MODE_SIZE (Pmode); | |
45550790 | 1797 | if (struct_value) |
53800dbe | 1798 | { |
1799 | rtx value = gen_reg_rtx (Pmode); | |
e513d163 | 1800 | emit_move_insn (value, adjust_address (arguments, Pmode, size)); |
45550790 | 1801 | emit_move_insn (struct_value, value); |
8ad4c111 | 1802 | if (REG_P (struct_value)) |
45550790 | 1803 | use_reg (&call_fusage, struct_value); |
53800dbe | 1804 | size += GET_MODE_SIZE (Pmode); |
1805 | } | |
1806 | ||
1807 | /* All arguments and registers used for the call are set up by now! */ | |
82c7907c | 1808 | function = prepare_call_address (NULL, function, NULL, &call_fusage, 0, 0); |
53800dbe | 1809 | |
1810 | /* Ensure address is valid. SYMBOL_REF is already valid, so no need, | |
1811 | and we don't want to load it into a register as an optimization, | |
1812 | because prepare_call_address already did it if it should be done. */ | |
1813 | if (GET_CODE (function) != SYMBOL_REF) | |
1814 | function = memory_address (FUNCTION_MODE, function); | |
1815 | ||
1816 | /* Generate the actual call instruction and save the return value. */ | |
1d99ab0a | 1817 | if (targetm.have_untyped_call ()) |
1818 | { | |
1819 | rtx mem = gen_rtx_MEM (FUNCTION_MODE, function); | |
1820 | emit_call_insn (targetm.gen_untyped_call (mem, result, | |
1821 | result_vector (1, result))); | |
1822 | } | |
7f265a08 | 1823 | else if (targetm.have_call_value ()) |
53800dbe | 1824 | { |
1825 | rtx valreg = 0; | |
1826 | ||
1827 | /* Locate the unique return register. It is not possible to | |
1828 | express a call that sets more than one return register using | |
1829 | call_value; use untyped_call for that. In fact, untyped_call | |
1830 | only needs to save the return registers in the given block. */ | |
1831 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1832 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
1833 | { | |
7f265a08 | 1834 | gcc_assert (!valreg); /* have_untyped_call required. */ |
7d3f6cc7 | 1835 | |
53800dbe | 1836 | valreg = gen_rtx_REG (mode, regno); |
1837 | } | |
1838 | ||
7f265a08 | 1839 | emit_insn (targetm.gen_call_value (valreg, |
1840 | gen_rtx_MEM (FUNCTION_MODE, function), | |
1841 | const0_rtx, NULL_RTX, const0_rtx)); | |
53800dbe | 1842 | |
e513d163 | 1843 | emit_move_insn (adjust_address (result, GET_MODE (valreg), 0), valreg); |
53800dbe | 1844 | } |
1845 | else | |
64db345d | 1846 | gcc_unreachable (); |
53800dbe | 1847 | |
d5f9786f | 1848 | /* Find the CALL insn we just emitted, and attach the register usage |
1849 | information. */ | |
1850 | call_insn = last_call_insn (); | |
1851 | add_function_usage_to (call_insn, call_fusage); | |
53800dbe | 1852 | |
1853 | /* Restore the stack. */ | |
71512c05 | 1854 | if (targetm.have_save_stack_nonlocal ()) |
e9c97615 | 1855 | emit_stack_restore (SAVE_NONLOCAL, old_stack_level); |
53800dbe | 1856 | else |
e9c97615 | 1857 | emit_stack_restore (SAVE_BLOCK, old_stack_level); |
9af5ce0c | 1858 | fixup_args_size_notes (call_insn, get_last_insn (), 0); |
53800dbe | 1859 | |
04a46d40 | 1860 | OK_DEFER_POP; |
1861 | ||
53800dbe | 1862 | /* Return the address of the result block. */ |
85d654dd | 1863 | result = copy_addr_to_reg (XEXP (result, 0)); |
1864 | return convert_memory_address (ptr_mode, result); | |
53800dbe | 1865 | } |
1866 | ||
1867 | /* Perform an untyped return. */ | |
1868 | ||
1869 | static void | |
aecda0d6 | 1870 | expand_builtin_return (rtx result) |
53800dbe | 1871 | { |
1872 | int size, align, regno; | |
d8ba6ec1 | 1873 | fixed_size_mode mode; |
53800dbe | 1874 | rtx reg; |
57c26b3a | 1875 | rtx_insn *call_fusage = 0; |
53800dbe | 1876 | |
85d654dd | 1877 | result = convert_memory_address (Pmode, result); |
726ec87c | 1878 | |
53800dbe | 1879 | apply_result_size (); |
1880 | result = gen_rtx_MEM (BLKmode, result); | |
1881 | ||
1d99ab0a | 1882 | if (targetm.have_untyped_return ()) |
53800dbe | 1883 | { |
1d99ab0a | 1884 | rtx vector = result_vector (0, result); |
1885 | emit_jump_insn (targetm.gen_untyped_return (result, vector)); | |
53800dbe | 1886 | emit_barrier (); |
1887 | return; | |
1888 | } | |
53800dbe | 1889 | |
1890 | /* Restore the return value and note that each value is used. */ | |
1891 | size = 0; | |
1892 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1893 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
1894 | { | |
1895 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1896 | if (size % align != 0) | |
1897 | size = CEIL (size, align) * align; | |
1898 | reg = gen_rtx_REG (mode, INCOMING_REGNO (regno)); | |
e513d163 | 1899 | emit_move_insn (reg, adjust_address (result, mode, size)); |
53800dbe | 1900 | |
1901 | push_to_sequence (call_fusage); | |
18b42941 | 1902 | emit_use (reg); |
53800dbe | 1903 | call_fusage = get_insns (); |
1904 | end_sequence (); | |
1905 | size += GET_MODE_SIZE (mode); | |
1906 | } | |
1907 | ||
1908 | /* Put the USE insns before the return. */ | |
31d3e01c | 1909 | emit_insn (call_fusage); |
53800dbe | 1910 | |
1911 | /* Return whatever values was restored by jumping directly to the end | |
1912 | of the function. */ | |
62380d2d | 1913 | expand_naked_return (); |
53800dbe | 1914 | } |
1915 | ||
539a3a92 | 1916 | /* Used by expand_builtin_classify_type and fold_builtin_classify_type. */ |
27d0c333 | 1917 | |
539a3a92 | 1918 | static enum type_class |
aecda0d6 | 1919 | type_to_class (tree type) |
539a3a92 | 1920 | { |
1921 | switch (TREE_CODE (type)) | |
1922 | { | |
1923 | case VOID_TYPE: return void_type_class; | |
1924 | case INTEGER_TYPE: return integer_type_class; | |
539a3a92 | 1925 | case ENUMERAL_TYPE: return enumeral_type_class; |
1926 | case BOOLEAN_TYPE: return boolean_type_class; | |
1927 | case POINTER_TYPE: return pointer_type_class; | |
1928 | case REFERENCE_TYPE: return reference_type_class; | |
1929 | case OFFSET_TYPE: return offset_type_class; | |
1930 | case REAL_TYPE: return real_type_class; | |
1931 | case COMPLEX_TYPE: return complex_type_class; | |
1932 | case FUNCTION_TYPE: return function_type_class; | |
1933 | case METHOD_TYPE: return method_type_class; | |
1934 | case RECORD_TYPE: return record_type_class; | |
1935 | case UNION_TYPE: | |
1936 | case QUAL_UNION_TYPE: return union_type_class; | |
1937 | case ARRAY_TYPE: return (TYPE_STRING_FLAG (type) | |
1938 | ? string_type_class : array_type_class); | |
539a3a92 | 1939 | case LANG_TYPE: return lang_type_class; |
1940 | default: return no_type_class; | |
1941 | } | |
1942 | } | |
bf8e3599 | 1943 | |
c2f47e15 | 1944 | /* Expand a call EXP to __builtin_classify_type. */ |
27d0c333 | 1945 | |
53800dbe | 1946 | static rtx |
c2f47e15 | 1947 | expand_builtin_classify_type (tree exp) |
53800dbe | 1948 | { |
c2f47e15 | 1949 | if (call_expr_nargs (exp)) |
1950 | return GEN_INT (type_to_class (TREE_TYPE (CALL_EXPR_ARG (exp, 0)))); | |
53800dbe | 1951 | return GEN_INT (no_type_class); |
1952 | } | |
1953 | ||
8c32188e | 1954 | /* This helper macro, meant to be used in mathfn_built_in below, determines |
1955 | which among a set of builtin math functions is appropriate for a given type | |
1956 | mode. The `F' (float) and `L' (long double) are automatically generated | |
1957 | from the 'double' case. If a function supports the _Float<N> and _Float<N>X | |
1958 | types, there are additional types that are considered with 'F32', 'F64', | |
1959 | 'F128', etc. suffixes. */ | |
e3240774 | 1960 | #define CASE_MATHFN(MATHFN) \ |
1961 | CASE_CFN_##MATHFN: \ | |
1962 | fcode = BUILT_IN_##MATHFN; fcodef = BUILT_IN_##MATHFN##F ; \ | |
1963 | fcodel = BUILT_IN_##MATHFN##L ; break; | |
8c32188e | 1964 | /* Similar to the above, but also add support for the _Float<N> and _Float<N>X |
1965 | types. */ | |
1966 | #define CASE_MATHFN_FLOATN(MATHFN) \ | |
1967 | CASE_CFN_##MATHFN: \ | |
1968 | fcode = BUILT_IN_##MATHFN; fcodef = BUILT_IN_##MATHFN##F ; \ | |
1969 | fcodel = BUILT_IN_##MATHFN##L ; fcodef16 = BUILT_IN_##MATHFN##F16 ; \ | |
1970 | fcodef32 = BUILT_IN_##MATHFN##F32; fcodef64 = BUILT_IN_##MATHFN##F64 ; \ | |
1971 | fcodef128 = BUILT_IN_##MATHFN##F128 ; fcodef32x = BUILT_IN_##MATHFN##F32X ; \ | |
1972 | fcodef64x = BUILT_IN_##MATHFN##F64X ; fcodef128x = BUILT_IN_##MATHFN##F128X ;\ | |
1973 | break; | |
cd2656b0 | 1974 | /* Similar to above, but appends _R after any F/L suffix. */ |
e3240774 | 1975 | #define CASE_MATHFN_REENT(MATHFN) \ |
1976 | case CFN_BUILT_IN_##MATHFN##_R: \ | |
1977 | case CFN_BUILT_IN_##MATHFN##F_R: \ | |
1978 | case CFN_BUILT_IN_##MATHFN##L_R: \ | |
1979 | fcode = BUILT_IN_##MATHFN##_R; fcodef = BUILT_IN_##MATHFN##F_R ; \ | |
1980 | fcodel = BUILT_IN_##MATHFN##L_R ; break; | |
07976da7 | 1981 | |
6c21be92 | 1982 | /* Return a function equivalent to FN but operating on floating-point |
1983 | values of type TYPE, or END_BUILTINS if no such function exists. | |
e3240774 | 1984 | This is purely an operation on function codes; it does not guarantee |
1985 | that the target actually has an implementation of the function. */ | |
c319d56a | 1986 | |
6c21be92 | 1987 | static built_in_function |
e3240774 | 1988 | mathfn_built_in_2 (tree type, combined_fn fn) |
0a68165a | 1989 | { |
8c32188e | 1990 | tree mtype; |
6c21be92 | 1991 | built_in_function fcode, fcodef, fcodel; |
8c32188e | 1992 | built_in_function fcodef16 = END_BUILTINS; |
1993 | built_in_function fcodef32 = END_BUILTINS; | |
1994 | built_in_function fcodef64 = END_BUILTINS; | |
1995 | built_in_function fcodef128 = END_BUILTINS; | |
1996 | built_in_function fcodef32x = END_BUILTINS; | |
1997 | built_in_function fcodef64x = END_BUILTINS; | |
1998 | built_in_function fcodef128x = END_BUILTINS; | |
07976da7 | 1999 | |
2000 | switch (fn) | |
2001 | { | |
e3240774 | 2002 | CASE_MATHFN (ACOS) |
2003 | CASE_MATHFN (ACOSH) | |
2004 | CASE_MATHFN (ASIN) | |
2005 | CASE_MATHFN (ASINH) | |
2006 | CASE_MATHFN (ATAN) | |
2007 | CASE_MATHFN (ATAN2) | |
2008 | CASE_MATHFN (ATANH) | |
2009 | CASE_MATHFN (CBRT) | |
054e9558 | 2010 | CASE_MATHFN_FLOATN (CEIL) |
e3240774 | 2011 | CASE_MATHFN (CEXPI) |
8c32188e | 2012 | CASE_MATHFN_FLOATN (COPYSIGN) |
e3240774 | 2013 | CASE_MATHFN (COS) |
2014 | CASE_MATHFN (COSH) | |
2015 | CASE_MATHFN (DREM) | |
2016 | CASE_MATHFN (ERF) | |
2017 | CASE_MATHFN (ERFC) | |
2018 | CASE_MATHFN (EXP) | |
2019 | CASE_MATHFN (EXP10) | |
2020 | CASE_MATHFN (EXP2) | |
2021 | CASE_MATHFN (EXPM1) | |
2022 | CASE_MATHFN (FABS) | |
2023 | CASE_MATHFN (FDIM) | |
054e9558 | 2024 | CASE_MATHFN_FLOATN (FLOOR) |
8c32188e | 2025 | CASE_MATHFN_FLOATN (FMA) |
2026 | CASE_MATHFN_FLOATN (FMAX) | |
2027 | CASE_MATHFN_FLOATN (FMIN) | |
e3240774 | 2028 | CASE_MATHFN (FMOD) |
2029 | CASE_MATHFN (FREXP) | |
2030 | CASE_MATHFN (GAMMA) | |
2031 | CASE_MATHFN_REENT (GAMMA) /* GAMMA_R */ | |
2032 | CASE_MATHFN (HUGE_VAL) | |
2033 | CASE_MATHFN (HYPOT) | |
2034 | CASE_MATHFN (ILOGB) | |
2035 | CASE_MATHFN (ICEIL) | |
2036 | CASE_MATHFN (IFLOOR) | |
2037 | CASE_MATHFN (INF) | |
2038 | CASE_MATHFN (IRINT) | |
2039 | CASE_MATHFN (IROUND) | |
2040 | CASE_MATHFN (ISINF) | |
2041 | CASE_MATHFN (J0) | |
2042 | CASE_MATHFN (J1) | |
2043 | CASE_MATHFN (JN) | |
2044 | CASE_MATHFN (LCEIL) | |
2045 | CASE_MATHFN (LDEXP) | |
2046 | CASE_MATHFN (LFLOOR) | |
2047 | CASE_MATHFN (LGAMMA) | |
2048 | CASE_MATHFN_REENT (LGAMMA) /* LGAMMA_R */ | |
2049 | CASE_MATHFN (LLCEIL) | |
2050 | CASE_MATHFN (LLFLOOR) | |
2051 | CASE_MATHFN (LLRINT) | |
2052 | CASE_MATHFN (LLROUND) | |
2053 | CASE_MATHFN (LOG) | |
2054 | CASE_MATHFN (LOG10) | |
2055 | CASE_MATHFN (LOG1P) | |
2056 | CASE_MATHFN (LOG2) | |
2057 | CASE_MATHFN (LOGB) | |
2058 | CASE_MATHFN (LRINT) | |
2059 | CASE_MATHFN (LROUND) | |
2060 | CASE_MATHFN (MODF) | |
2061 | CASE_MATHFN (NAN) | |
2062 | CASE_MATHFN (NANS) | |
054e9558 | 2063 | CASE_MATHFN_FLOATN (NEARBYINT) |
e3240774 | 2064 | CASE_MATHFN (NEXTAFTER) |
2065 | CASE_MATHFN (NEXTTOWARD) | |
2066 | CASE_MATHFN (POW) | |
2067 | CASE_MATHFN (POWI) | |
2068 | CASE_MATHFN (POW10) | |
2069 | CASE_MATHFN (REMAINDER) | |
2070 | CASE_MATHFN (REMQUO) | |
054e9558 | 2071 | CASE_MATHFN_FLOATN (RINT) |
2072 | CASE_MATHFN_FLOATN (ROUND) | |
e3240774 | 2073 | CASE_MATHFN (SCALB) |
2074 | CASE_MATHFN (SCALBLN) | |
2075 | CASE_MATHFN (SCALBN) | |
2076 | CASE_MATHFN (SIGNBIT) | |
2077 | CASE_MATHFN (SIGNIFICAND) | |
2078 | CASE_MATHFN (SIN) | |
2079 | CASE_MATHFN (SINCOS) | |
2080 | CASE_MATHFN (SINH) | |
8c32188e | 2081 | CASE_MATHFN_FLOATN (SQRT) |
e3240774 | 2082 | CASE_MATHFN (TAN) |
2083 | CASE_MATHFN (TANH) | |
2084 | CASE_MATHFN (TGAMMA) | |
054e9558 | 2085 | CASE_MATHFN_FLOATN (TRUNC) |
e3240774 | 2086 | CASE_MATHFN (Y0) |
2087 | CASE_MATHFN (Y1) | |
2088 | CASE_MATHFN (YN) | |
07976da7 | 2089 | |
e3240774 | 2090 | default: |
2091 | return END_BUILTINS; | |
2092 | } | |
07976da7 | 2093 | |
8c32188e | 2094 | mtype = TYPE_MAIN_VARIANT (type); |
2095 | if (mtype == double_type_node) | |
6c21be92 | 2096 | return fcode; |
8c32188e | 2097 | else if (mtype == float_type_node) |
6c21be92 | 2098 | return fcodef; |
8c32188e | 2099 | else if (mtype == long_double_type_node) |
6c21be92 | 2100 | return fcodel; |
8c32188e | 2101 | else if (mtype == float16_type_node) |
2102 | return fcodef16; | |
2103 | else if (mtype == float32_type_node) | |
2104 | return fcodef32; | |
2105 | else if (mtype == float64_type_node) | |
2106 | return fcodef64; | |
2107 | else if (mtype == float128_type_node) | |
2108 | return fcodef128; | |
2109 | else if (mtype == float32x_type_node) | |
2110 | return fcodef32x; | |
2111 | else if (mtype == float64x_type_node) | |
2112 | return fcodef64x; | |
2113 | else if (mtype == float128x_type_node) | |
2114 | return fcodef128x; | |
07976da7 | 2115 | else |
6c21be92 | 2116 | return END_BUILTINS; |
2117 | } | |
2118 | ||
2119 | /* Return mathematic function equivalent to FN but operating directly on TYPE, | |
2120 | if available. If IMPLICIT_P is true use the implicit builtin declaration, | |
2121 | otherwise use the explicit declaration. If we can't do the conversion, | |
2122 | return null. */ | |
2123 | ||
2124 | static tree | |
e3240774 | 2125 | mathfn_built_in_1 (tree type, combined_fn fn, bool implicit_p) |
6c21be92 | 2126 | { |
2127 | built_in_function fcode2 = mathfn_built_in_2 (type, fn); | |
2128 | if (fcode2 == END_BUILTINS) | |
c2f47e15 | 2129 | return NULL_TREE; |
b9a16870 | 2130 | |
2131 | if (implicit_p && !builtin_decl_implicit_p (fcode2)) | |
2132 | return NULL_TREE; | |
2133 | ||
2134 | return builtin_decl_explicit (fcode2); | |
0a68165a | 2135 | } |
2136 | ||
e3240774 | 2137 | /* Like mathfn_built_in_1, but always use the implicit array. */ |
c319d56a | 2138 | |
2139 | tree | |
e3240774 | 2140 | mathfn_built_in (tree type, combined_fn fn) |
c319d56a | 2141 | { |
2142 | return mathfn_built_in_1 (type, fn, /*implicit=*/ 1); | |
2143 | } | |
2144 | ||
e3240774 | 2145 | /* Like mathfn_built_in_1, but take a built_in_function and |
2146 | always use the implicit array. */ | |
2147 | ||
2148 | tree | |
2149 | mathfn_built_in (tree type, enum built_in_function fn) | |
2150 | { | |
2151 | return mathfn_built_in_1 (type, as_combined_fn (fn), /*implicit=*/ 1); | |
2152 | } | |
2153 | ||
1f24b8e9 | 2154 | /* If BUILT_IN_NORMAL function FNDECL has an associated internal function, |
2155 | return its code, otherwise return IFN_LAST. Note that this function | |
2156 | only tests whether the function is defined in internals.def, not whether | |
2157 | it is actually available on the target. */ | |
2158 | ||
2159 | internal_fn | |
2160 | associated_internal_fn (tree fndecl) | |
2161 | { | |
2162 | gcc_checking_assert (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL); | |
2163 | tree return_type = TREE_TYPE (TREE_TYPE (fndecl)); | |
2164 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2165 | { | |
2166 | #define DEF_INTERNAL_FLT_FN(NAME, FLAGS, OPTAB, TYPE) \ | |
2167 | CASE_FLT_FN (BUILT_IN_##NAME): return IFN_##NAME; | |
8c32188e | 2168 | #define DEF_INTERNAL_FLT_FLOATN_FN(NAME, FLAGS, OPTAB, TYPE) \ |
2169 | CASE_FLT_FN (BUILT_IN_##NAME): return IFN_##NAME; \ | |
2170 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_##NAME): return IFN_##NAME; | |
c9452b7c | 2171 | #define DEF_INTERNAL_INT_FN(NAME, FLAGS, OPTAB, TYPE) \ |
2172 | CASE_INT_FN (BUILT_IN_##NAME): return IFN_##NAME; | |
1f24b8e9 | 2173 | #include "internal-fn.def" |
2174 | ||
2175 | CASE_FLT_FN (BUILT_IN_POW10): | |
2176 | return IFN_EXP10; | |
2177 | ||
2178 | CASE_FLT_FN (BUILT_IN_DREM): | |
2179 | return IFN_REMAINDER; | |
2180 | ||
2181 | CASE_FLT_FN (BUILT_IN_SCALBN): | |
2182 | CASE_FLT_FN (BUILT_IN_SCALBLN): | |
2183 | if (REAL_MODE_FORMAT (TYPE_MODE (return_type))->b == 2) | |
2184 | return IFN_LDEXP; | |
2185 | return IFN_LAST; | |
2186 | ||
2187 | default: | |
2188 | return IFN_LAST; | |
2189 | } | |
2190 | } | |
2191 | ||
2192 | /* If CALL is a call to a BUILT_IN_NORMAL function that could be replaced | |
2193 | on the current target by a call to an internal function, return the | |
2194 | code of that internal function, otherwise return IFN_LAST. The caller | |
2195 | is responsible for ensuring that any side-effects of the built-in | |
2196 | call are dealt with correctly. E.g. if CALL sets errno, the caller | |
2197 | must decide that the errno result isn't needed or make it available | |
2198 | in some other way. */ | |
2199 | ||
2200 | internal_fn | |
2201 | replacement_internal_fn (gcall *call) | |
2202 | { | |
2203 | if (gimple_call_builtin_p (call, BUILT_IN_NORMAL)) | |
2204 | { | |
2205 | internal_fn ifn = associated_internal_fn (gimple_call_fndecl (call)); | |
2206 | if (ifn != IFN_LAST) | |
2207 | { | |
2208 | tree_pair types = direct_internal_fn_types (ifn, call); | |
acdfe9e0 | 2209 | optimization_type opt_type = bb_optimization_type (gimple_bb (call)); |
2210 | if (direct_internal_fn_supported_p (ifn, types, opt_type)) | |
1f24b8e9 | 2211 | return ifn; |
2212 | } | |
2213 | } | |
2214 | return IFN_LAST; | |
2215 | } | |
2216 | ||
7e0713b1 | 2217 | /* Expand a call to the builtin trinary math functions (fma). |
2218 | Return NULL_RTX if a normal call should be emitted rather than expanding the | |
2219 | function in-line. EXP is the expression that is a call to the builtin | |
2220 | function; if convenient, the result should be placed in TARGET. | |
2221 | SUBTARGET may be used as the target for computing one of EXP's | |
2222 | operands. */ | |
2223 | ||
2224 | static rtx | |
2225 | expand_builtin_mathfn_ternary (tree exp, rtx target, rtx subtarget) | |
2226 | { | |
2227 | optab builtin_optab; | |
1e0c0b35 | 2228 | rtx op0, op1, op2, result; |
2229 | rtx_insn *insns; | |
7e0713b1 | 2230 | tree fndecl = get_callee_fndecl (exp); |
2231 | tree arg0, arg1, arg2; | |
3754d046 | 2232 | machine_mode mode; |
7e0713b1 | 2233 | |
2234 | if (!validate_arglist (exp, REAL_TYPE, REAL_TYPE, REAL_TYPE, VOID_TYPE)) | |
2235 | return NULL_RTX; | |
2236 | ||
2237 | arg0 = CALL_EXPR_ARG (exp, 0); | |
2238 | arg1 = CALL_EXPR_ARG (exp, 1); | |
2239 | arg2 = CALL_EXPR_ARG (exp, 2); | |
2240 | ||
2241 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2242 | { | |
2243 | CASE_FLT_FN (BUILT_IN_FMA): | |
8c32188e | 2244 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMA): |
7e0713b1 | 2245 | builtin_optab = fma_optab; break; |
2246 | default: | |
2247 | gcc_unreachable (); | |
2248 | } | |
2249 | ||
2250 | /* Make a suitable register to place result in. */ | |
2251 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
2252 | ||
2253 | /* Before working hard, check whether the instruction is available. */ | |
2254 | if (optab_handler (builtin_optab, mode) == CODE_FOR_nothing) | |
2255 | return NULL_RTX; | |
2256 | ||
de2e453e | 2257 | result = gen_reg_rtx (mode); |
7e0713b1 | 2258 | |
2259 | /* Always stabilize the argument list. */ | |
2260 | CALL_EXPR_ARG (exp, 0) = arg0 = builtin_save_expr (arg0); | |
2261 | CALL_EXPR_ARG (exp, 1) = arg1 = builtin_save_expr (arg1); | |
2262 | CALL_EXPR_ARG (exp, 2) = arg2 = builtin_save_expr (arg2); | |
2263 | ||
2264 | op0 = expand_expr (arg0, subtarget, VOIDmode, EXPAND_NORMAL); | |
2265 | op1 = expand_normal (arg1); | |
2266 | op2 = expand_normal (arg2); | |
2267 | ||
2268 | start_sequence (); | |
2269 | ||
de2e453e | 2270 | /* Compute into RESULT. |
2271 | Set RESULT to wherever the result comes back. */ | |
2272 | result = expand_ternary_op (mode, builtin_optab, op0, op1, op2, | |
2273 | result, 0); | |
7e0713b1 | 2274 | |
2275 | /* If we were unable to expand via the builtin, stop the sequence | |
2276 | (without outputting the insns) and call to the library function | |
2277 | with the stabilized argument list. */ | |
de2e453e | 2278 | if (result == 0) |
7e0713b1 | 2279 | { |
2280 | end_sequence (); | |
2281 | return expand_call (exp, target, target == const0_rtx); | |
2282 | } | |
2283 | ||
2284 | /* Output the entire sequence. */ | |
2285 | insns = get_insns (); | |
2286 | end_sequence (); | |
2287 | emit_insn (insns); | |
2288 | ||
de2e453e | 2289 | return result; |
7e0713b1 | 2290 | } |
2291 | ||
6b43bae4 | 2292 | /* Expand a call to the builtin sin and cos math functions. |
c2f47e15 | 2293 | Return NULL_RTX if a normal call should be emitted rather than expanding the |
6b43bae4 | 2294 | function in-line. EXP is the expression that is a call to the builtin |
2295 | function; if convenient, the result should be placed in TARGET. | |
2296 | SUBTARGET may be used as the target for computing one of EXP's | |
2297 | operands. */ | |
2298 | ||
2299 | static rtx | |
2300 | expand_builtin_mathfn_3 (tree exp, rtx target, rtx subtarget) | |
2301 | { | |
2302 | optab builtin_optab; | |
1e0c0b35 | 2303 | rtx op0; |
2304 | rtx_insn *insns; | |
6b43bae4 | 2305 | tree fndecl = get_callee_fndecl (exp); |
3754d046 | 2306 | machine_mode mode; |
abfea505 | 2307 | tree arg; |
6b43bae4 | 2308 | |
c2f47e15 | 2309 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
2310 | return NULL_RTX; | |
6b43bae4 | 2311 | |
c2f47e15 | 2312 | arg = CALL_EXPR_ARG (exp, 0); |
6b43bae4 | 2313 | |
2314 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2315 | { | |
4f35b1fc | 2316 | CASE_FLT_FN (BUILT_IN_SIN): |
2317 | CASE_FLT_FN (BUILT_IN_COS): | |
6b43bae4 | 2318 | builtin_optab = sincos_optab; break; |
2319 | default: | |
64db345d | 2320 | gcc_unreachable (); |
6b43bae4 | 2321 | } |
2322 | ||
2323 | /* Make a suitable register to place result in. */ | |
2324 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
2325 | ||
6b43bae4 | 2326 | /* Check if sincos insn is available, otherwise fallback |
0bed3869 | 2327 | to sin or cos insn. */ |
d6bf3b14 | 2328 | if (optab_handler (builtin_optab, mode) == CODE_FOR_nothing) |
6b43bae4 | 2329 | switch (DECL_FUNCTION_CODE (fndecl)) |
2330 | { | |
4f35b1fc | 2331 | CASE_FLT_FN (BUILT_IN_SIN): |
6b43bae4 | 2332 | builtin_optab = sin_optab; break; |
4f35b1fc | 2333 | CASE_FLT_FN (BUILT_IN_COS): |
6b43bae4 | 2334 | builtin_optab = cos_optab; break; |
2335 | default: | |
64db345d | 2336 | gcc_unreachable (); |
6b43bae4 | 2337 | } |
6b43bae4 | 2338 | |
2339 | /* Before working hard, check whether the instruction is available. */ | |
d6bf3b14 | 2340 | if (optab_handler (builtin_optab, mode) != CODE_FOR_nothing) |
6b43bae4 | 2341 | { |
de2e453e | 2342 | rtx result = gen_reg_rtx (mode); |
6b43bae4 | 2343 | |
2344 | /* Wrap the computation of the argument in a SAVE_EXPR, as we may | |
2345 | need to expand the argument again. This way, we will not perform | |
2346 | side-effects more the once. */ | |
abfea505 | 2347 | CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg); |
6b43bae4 | 2348 | |
1db6d067 | 2349 | op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL); |
6b43bae4 | 2350 | |
6b43bae4 | 2351 | start_sequence (); |
2352 | ||
de2e453e | 2353 | /* Compute into RESULT. |
2354 | Set RESULT to wherever the result comes back. */ | |
6b43bae4 | 2355 | if (builtin_optab == sincos_optab) |
2356 | { | |
de2e453e | 2357 | int ok; |
7d3f6cc7 | 2358 | |
6b43bae4 | 2359 | switch (DECL_FUNCTION_CODE (fndecl)) |
2360 | { | |
4f35b1fc | 2361 | CASE_FLT_FN (BUILT_IN_SIN): |
de2e453e | 2362 | ok = expand_twoval_unop (builtin_optab, op0, 0, result, 0); |
6b43bae4 | 2363 | break; |
4f35b1fc | 2364 | CASE_FLT_FN (BUILT_IN_COS): |
de2e453e | 2365 | ok = expand_twoval_unop (builtin_optab, op0, result, 0, 0); |
6b43bae4 | 2366 | break; |
2367 | default: | |
64db345d | 2368 | gcc_unreachable (); |
6b43bae4 | 2369 | } |
de2e453e | 2370 | gcc_assert (ok); |
6b43bae4 | 2371 | } |
2372 | else | |
de2e453e | 2373 | result = expand_unop (mode, builtin_optab, op0, result, 0); |
6b43bae4 | 2374 | |
de2e453e | 2375 | if (result != 0) |
6b43bae4 | 2376 | { |
6b43bae4 | 2377 | /* Output the entire sequence. */ |
2378 | insns = get_insns (); | |
2379 | end_sequence (); | |
2380 | emit_insn (insns); | |
de2e453e | 2381 | return result; |
6b43bae4 | 2382 | } |
2383 | ||
2384 | /* If we were unable to expand via the builtin, stop the sequence | |
2385 | (without outputting the insns) and call to the library function | |
2386 | with the stabilized argument list. */ | |
2387 | end_sequence (); | |
2388 | } | |
2389 | ||
de2e453e | 2390 | return expand_call (exp, target, target == const0_rtx); |
6b43bae4 | 2391 | } |
2392 | ||
a65c4d64 | 2393 | /* Given an interclass math builtin decl FNDECL and it's argument ARG |
2394 | return an RTL instruction code that implements the functionality. | |
2395 | If that isn't possible or available return CODE_FOR_nothing. */ | |
a67a90e5 | 2396 | |
a65c4d64 | 2397 | static enum insn_code |
2398 | interclass_mathfn_icode (tree arg, tree fndecl) | |
a67a90e5 | 2399 | { |
a65c4d64 | 2400 | bool errno_set = false; |
6cdd383a | 2401 | optab builtin_optab = unknown_optab; |
3754d046 | 2402 | machine_mode mode; |
a67a90e5 | 2403 | |
2404 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2405 | { | |
2406 | CASE_FLT_FN (BUILT_IN_ILOGB): | |
12f08300 | 2407 | errno_set = true; builtin_optab = ilogb_optab; break; |
2408 | CASE_FLT_FN (BUILT_IN_ISINF): | |
2409 | builtin_optab = isinf_optab; break; | |
2410 | case BUILT_IN_ISNORMAL: | |
2411 | case BUILT_IN_ISFINITE: | |
2412 | CASE_FLT_FN (BUILT_IN_FINITE): | |
2413 | case BUILT_IN_FINITED32: | |
2414 | case BUILT_IN_FINITED64: | |
2415 | case BUILT_IN_FINITED128: | |
2416 | case BUILT_IN_ISINFD32: | |
2417 | case BUILT_IN_ISINFD64: | |
2418 | case BUILT_IN_ISINFD128: | |
2419 | /* These builtins have no optabs (yet). */ | |
cde061c1 | 2420 | break; |
a67a90e5 | 2421 | default: |
2422 | gcc_unreachable (); | |
2423 | } | |
2424 | ||
2425 | /* There's no easy way to detect the case we need to set EDOM. */ | |
2426 | if (flag_errno_math && errno_set) | |
a65c4d64 | 2427 | return CODE_FOR_nothing; |
a67a90e5 | 2428 | |
2429 | /* Optab mode depends on the mode of the input argument. */ | |
2430 | mode = TYPE_MODE (TREE_TYPE (arg)); | |
2431 | ||
cde061c1 | 2432 | if (builtin_optab) |
d6bf3b14 | 2433 | return optab_handler (builtin_optab, mode); |
a65c4d64 | 2434 | return CODE_FOR_nothing; |
2435 | } | |
2436 | ||
2437 | /* Expand a call to one of the builtin math functions that operate on | |
12f08300 | 2438 | floating point argument and output an integer result (ilogb, isinf, |
2439 | isnan, etc). | |
a65c4d64 | 2440 | Return 0 if a normal call should be emitted rather than expanding the |
2441 | function in-line. EXP is the expression that is a call to the builtin | |
f97eea22 | 2442 | function; if convenient, the result should be placed in TARGET. */ |
a65c4d64 | 2443 | |
2444 | static rtx | |
f97eea22 | 2445 | expand_builtin_interclass_mathfn (tree exp, rtx target) |
a65c4d64 | 2446 | { |
2447 | enum insn_code icode = CODE_FOR_nothing; | |
2448 | rtx op0; | |
2449 | tree fndecl = get_callee_fndecl (exp); | |
3754d046 | 2450 | machine_mode mode; |
a65c4d64 | 2451 | tree arg; |
2452 | ||
2453 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) | |
2454 | return NULL_RTX; | |
2455 | ||
2456 | arg = CALL_EXPR_ARG (exp, 0); | |
2457 | icode = interclass_mathfn_icode (arg, fndecl); | |
2458 | mode = TYPE_MODE (TREE_TYPE (arg)); | |
2459 | ||
a67a90e5 | 2460 | if (icode != CODE_FOR_nothing) |
2461 | { | |
8786db1e | 2462 | struct expand_operand ops[1]; |
1e0c0b35 | 2463 | rtx_insn *last = get_last_insn (); |
4e2a2fb4 | 2464 | tree orig_arg = arg; |
a67a90e5 | 2465 | |
2466 | /* Wrap the computation of the argument in a SAVE_EXPR, as we may | |
2467 | need to expand the argument again. This way, we will not perform | |
2468 | side-effects more the once. */ | |
abfea505 | 2469 | CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg); |
a67a90e5 | 2470 | |
f97eea22 | 2471 | op0 = expand_expr (arg, NULL_RTX, VOIDmode, EXPAND_NORMAL); |
a67a90e5 | 2472 | |
2473 | if (mode != GET_MODE (op0)) | |
2474 | op0 = convert_to_mode (mode, op0, 0); | |
2475 | ||
8786db1e | 2476 | create_output_operand (&ops[0], target, TYPE_MODE (TREE_TYPE (exp))); |
2477 | if (maybe_legitimize_operands (icode, 0, 1, ops) | |
2478 | && maybe_emit_unop_insn (icode, ops[0].value, op0, UNKNOWN)) | |
2479 | return ops[0].value; | |
2480 | ||
4e2a2fb4 | 2481 | delete_insns_since (last); |
2482 | CALL_EXPR_ARG (exp, 0) = orig_arg; | |
a67a90e5 | 2483 | } |
2484 | ||
a65c4d64 | 2485 | return NULL_RTX; |
a67a90e5 | 2486 | } |
2487 | ||
c3147c1a | 2488 | /* Expand a call to the builtin sincos math function. |
c2f47e15 | 2489 | Return NULL_RTX if a normal call should be emitted rather than expanding the |
c3147c1a | 2490 | function in-line. EXP is the expression that is a call to the builtin |
2491 | function. */ | |
2492 | ||
2493 | static rtx | |
2494 | expand_builtin_sincos (tree exp) | |
2495 | { | |
2496 | rtx op0, op1, op2, target1, target2; | |
3754d046 | 2497 | machine_mode mode; |
c3147c1a | 2498 | tree arg, sinp, cosp; |
2499 | int result; | |
389dd41b | 2500 | location_t loc = EXPR_LOCATION (exp); |
be5575b2 | 2501 | tree alias_type, alias_off; |
c3147c1a | 2502 | |
c2f47e15 | 2503 | if (!validate_arglist (exp, REAL_TYPE, |
2504 | POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) | |
2505 | return NULL_RTX; | |
c3147c1a | 2506 | |
c2f47e15 | 2507 | arg = CALL_EXPR_ARG (exp, 0); |
2508 | sinp = CALL_EXPR_ARG (exp, 1); | |
2509 | cosp = CALL_EXPR_ARG (exp, 2); | |
c3147c1a | 2510 | |
2511 | /* Make a suitable register to place result in. */ | |
2512 | mode = TYPE_MODE (TREE_TYPE (arg)); | |
2513 | ||
2514 | /* Check if sincos insn is available, otherwise emit the call. */ | |
d6bf3b14 | 2515 | if (optab_handler (sincos_optab, mode) == CODE_FOR_nothing) |
c3147c1a | 2516 | return NULL_RTX; |
2517 | ||
2518 | target1 = gen_reg_rtx (mode); | |
2519 | target2 = gen_reg_rtx (mode); | |
2520 | ||
8ec3c5c2 | 2521 | op0 = expand_normal (arg); |
be5575b2 | 2522 | alias_type = build_pointer_type_for_mode (TREE_TYPE (arg), ptr_mode, true); |
2523 | alias_off = build_int_cst (alias_type, 0); | |
2524 | op1 = expand_normal (fold_build2_loc (loc, MEM_REF, TREE_TYPE (arg), | |
2525 | sinp, alias_off)); | |
2526 | op2 = expand_normal (fold_build2_loc (loc, MEM_REF, TREE_TYPE (arg), | |
2527 | cosp, alias_off)); | |
c3147c1a | 2528 | |
2529 | /* Compute into target1 and target2. | |
2530 | Set TARGET to wherever the result comes back. */ | |
2531 | result = expand_twoval_unop (sincos_optab, op0, target2, target1, 0); | |
2532 | gcc_assert (result); | |
2533 | ||
2534 | /* Move target1 and target2 to the memory locations indicated | |
2535 | by op1 and op2. */ | |
2536 | emit_move_insn (op1, target1); | |
2537 | emit_move_insn (op2, target2); | |
2538 | ||
2539 | return const0_rtx; | |
2540 | } | |
2541 | ||
d735c391 | 2542 | /* Expand a call to the internal cexpi builtin to the sincos math function. |
2543 | EXP is the expression that is a call to the builtin function; if convenient, | |
f97eea22 | 2544 | the result should be placed in TARGET. */ |
d735c391 | 2545 | |
2546 | static rtx | |
f97eea22 | 2547 | expand_builtin_cexpi (tree exp, rtx target) |
d735c391 | 2548 | { |
2549 | tree fndecl = get_callee_fndecl (exp); | |
d735c391 | 2550 | tree arg, type; |
3754d046 | 2551 | machine_mode mode; |
d735c391 | 2552 | rtx op0, op1, op2; |
389dd41b | 2553 | location_t loc = EXPR_LOCATION (exp); |
d735c391 | 2554 | |
c2f47e15 | 2555 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
2556 | return NULL_RTX; | |
d735c391 | 2557 | |
c2f47e15 | 2558 | arg = CALL_EXPR_ARG (exp, 0); |
d735c391 | 2559 | type = TREE_TYPE (arg); |
2560 | mode = TYPE_MODE (TREE_TYPE (arg)); | |
2561 | ||
2562 | /* Try expanding via a sincos optab, fall back to emitting a libcall | |
18b8d8ae | 2563 | to sincos or cexp. We are sure we have sincos or cexp because cexpi |
2564 | is only generated from sincos, cexp or if we have either of them. */ | |
d6bf3b14 | 2565 | if (optab_handler (sincos_optab, mode) != CODE_FOR_nothing) |
d735c391 | 2566 | { |
2567 | op1 = gen_reg_rtx (mode); | |
2568 | op2 = gen_reg_rtx (mode); | |
2569 | ||
f97eea22 | 2570 | op0 = expand_expr (arg, NULL_RTX, VOIDmode, EXPAND_NORMAL); |
d735c391 | 2571 | |
2572 | /* Compute into op1 and op2. */ | |
2573 | expand_twoval_unop (sincos_optab, op0, op2, op1, 0); | |
2574 | } | |
30f690e0 | 2575 | else if (targetm.libc_has_function (function_sincos)) |
d735c391 | 2576 | { |
c2f47e15 | 2577 | tree call, fn = NULL_TREE; |
d735c391 | 2578 | tree top1, top2; |
2579 | rtx op1a, op2a; | |
2580 | ||
2581 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF) | |
b9a16870 | 2582 | fn = builtin_decl_explicit (BUILT_IN_SINCOSF); |
d735c391 | 2583 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI) |
b9a16870 | 2584 | fn = builtin_decl_explicit (BUILT_IN_SINCOS); |
d735c391 | 2585 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL) |
b9a16870 | 2586 | fn = builtin_decl_explicit (BUILT_IN_SINCOSL); |
c2f47e15 | 2587 | else |
2588 | gcc_unreachable (); | |
48e1416a | 2589 | |
0ab48139 | 2590 | op1 = assign_temp (TREE_TYPE (arg), 1, 1); |
2591 | op2 = assign_temp (TREE_TYPE (arg), 1, 1); | |
99182918 | 2592 | op1a = copy_addr_to_reg (XEXP (op1, 0)); |
2593 | op2a = copy_addr_to_reg (XEXP (op2, 0)); | |
d735c391 | 2594 | top1 = make_tree (build_pointer_type (TREE_TYPE (arg)), op1a); |
2595 | top2 = make_tree (build_pointer_type (TREE_TYPE (arg)), op2a); | |
2596 | ||
d735c391 | 2597 | /* Make sure not to fold the sincos call again. */ |
2598 | call = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn); | |
c2f47e15 | 2599 | expand_normal (build_call_nary (TREE_TYPE (TREE_TYPE (fn)), |
2600 | call, 3, arg, top1, top2)); | |
d735c391 | 2601 | } |
18b8d8ae | 2602 | else |
2603 | { | |
0ecbc158 | 2604 | tree call, fn = NULL_TREE, narg; |
18b8d8ae | 2605 | tree ctype = build_complex_type (type); |
2606 | ||
0ecbc158 | 2607 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF) |
b9a16870 | 2608 | fn = builtin_decl_explicit (BUILT_IN_CEXPF); |
0ecbc158 | 2609 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI) |
b9a16870 | 2610 | fn = builtin_decl_explicit (BUILT_IN_CEXP); |
0ecbc158 | 2611 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL) |
b9a16870 | 2612 | fn = builtin_decl_explicit (BUILT_IN_CEXPL); |
c2f47e15 | 2613 | else |
2614 | gcc_unreachable (); | |
fc0dfa6e | 2615 | |
2616 | /* If we don't have a decl for cexp create one. This is the | |
2617 | friendliest fallback if the user calls __builtin_cexpi | |
2618 | without full target C99 function support. */ | |
2619 | if (fn == NULL_TREE) | |
2620 | { | |
2621 | tree fntype; | |
2622 | const char *name = NULL; | |
2623 | ||
2624 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF) | |
2625 | name = "cexpf"; | |
2626 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI) | |
2627 | name = "cexp"; | |
2628 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL) | |
2629 | name = "cexpl"; | |
2630 | ||
2631 | fntype = build_function_type_list (ctype, ctype, NULL_TREE); | |
2632 | fn = build_fn_decl (name, fntype); | |
2633 | } | |
2634 | ||
389dd41b | 2635 | narg = fold_build2_loc (loc, COMPLEX_EXPR, ctype, |
18b8d8ae | 2636 | build_real (type, dconst0), arg); |
2637 | ||
2638 | /* Make sure not to fold the cexp call again. */ | |
2639 | call = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn); | |
48e1416a | 2640 | return expand_expr (build_call_nary (ctype, call, 1, narg), |
1db6d067 | 2641 | target, VOIDmode, EXPAND_NORMAL); |
18b8d8ae | 2642 | } |
d735c391 | 2643 | |
2644 | /* Now build the proper return type. */ | |
2645 | return expand_expr (build2 (COMPLEX_EXPR, build_complex_type (type), | |
2646 | make_tree (TREE_TYPE (arg), op2), | |
2647 | make_tree (TREE_TYPE (arg), op1)), | |
1db6d067 | 2648 | target, VOIDmode, EXPAND_NORMAL); |
d735c391 | 2649 | } |
2650 | ||
a65c4d64 | 2651 | /* Conveniently construct a function call expression. FNDECL names the |
2652 | function to be called, N is the number of arguments, and the "..." | |
2653 | parameters are the argument expressions. Unlike build_call_exr | |
2654 | this doesn't fold the call, hence it will always return a CALL_EXPR. */ | |
2655 | ||
2656 | static tree | |
2657 | build_call_nofold_loc (location_t loc, tree fndecl, int n, ...) | |
2658 | { | |
2659 | va_list ap; | |
2660 | tree fntype = TREE_TYPE (fndecl); | |
2661 | tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl); | |
2662 | ||
2663 | va_start (ap, n); | |
2664 | fn = build_call_valist (TREE_TYPE (fntype), fn, n, ap); | |
2665 | va_end (ap); | |
2666 | SET_EXPR_LOCATION (fn, loc); | |
2667 | return fn; | |
2668 | } | |
a65c4d64 | 2669 | |
7d3afc77 | 2670 | /* Expand a call to one of the builtin rounding functions gcc defines |
2671 | as an extension (lfloor and lceil). As these are gcc extensions we | |
2672 | do not need to worry about setting errno to EDOM. | |
ad52b9b7 | 2673 | If expanding via optab fails, lower expression to (int)(floor(x)). |
2674 | EXP is the expression that is a call to the builtin function; | |
ff1b14e4 | 2675 | if convenient, the result should be placed in TARGET. */ |
ad52b9b7 | 2676 | |
2677 | static rtx | |
ff1b14e4 | 2678 | expand_builtin_int_roundingfn (tree exp, rtx target) |
ad52b9b7 | 2679 | { |
9c42dd28 | 2680 | convert_optab builtin_optab; |
1e0c0b35 | 2681 | rtx op0, tmp; |
2682 | rtx_insn *insns; | |
ad52b9b7 | 2683 | tree fndecl = get_callee_fndecl (exp); |
ad52b9b7 | 2684 | enum built_in_function fallback_fn; |
2685 | tree fallback_fndecl; | |
3754d046 | 2686 | machine_mode mode; |
4de0924f | 2687 | tree arg; |
ad52b9b7 | 2688 | |
c2f47e15 | 2689 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
ad52b9b7 | 2690 | gcc_unreachable (); |
2691 | ||
c2f47e15 | 2692 | arg = CALL_EXPR_ARG (exp, 0); |
ad52b9b7 | 2693 | |
2694 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2695 | { | |
80ff6494 | 2696 | CASE_FLT_FN (BUILT_IN_ICEIL): |
4f35b1fc | 2697 | CASE_FLT_FN (BUILT_IN_LCEIL): |
2698 | CASE_FLT_FN (BUILT_IN_LLCEIL): | |
ac148751 | 2699 | builtin_optab = lceil_optab; |
2700 | fallback_fn = BUILT_IN_CEIL; | |
2701 | break; | |
2702 | ||
80ff6494 | 2703 | CASE_FLT_FN (BUILT_IN_IFLOOR): |
4f35b1fc | 2704 | CASE_FLT_FN (BUILT_IN_LFLOOR): |
2705 | CASE_FLT_FN (BUILT_IN_LLFLOOR): | |
ad52b9b7 | 2706 | builtin_optab = lfloor_optab; |
2707 | fallback_fn = BUILT_IN_FLOOR; | |
2708 | break; | |
2709 | ||
2710 | default: | |
2711 | gcc_unreachable (); | |
2712 | } | |
2713 | ||
2714 | /* Make a suitable register to place result in. */ | |
2715 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
2716 | ||
9c42dd28 | 2717 | target = gen_reg_rtx (mode); |
ad52b9b7 | 2718 | |
9c42dd28 | 2719 | /* Wrap the computation of the argument in a SAVE_EXPR, as we may |
2720 | need to expand the argument again. This way, we will not perform | |
2721 | side-effects more the once. */ | |
abfea505 | 2722 | CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg); |
ad52b9b7 | 2723 | |
ff1b14e4 | 2724 | op0 = expand_expr (arg, NULL, VOIDmode, EXPAND_NORMAL); |
ad52b9b7 | 2725 | |
9c42dd28 | 2726 | start_sequence (); |
ad52b9b7 | 2727 | |
9c42dd28 | 2728 | /* Compute into TARGET. */ |
2729 | if (expand_sfix_optab (target, op0, builtin_optab)) | |
2730 | { | |
2731 | /* Output the entire sequence. */ | |
2732 | insns = get_insns (); | |
ad52b9b7 | 2733 | end_sequence (); |
9c42dd28 | 2734 | emit_insn (insns); |
2735 | return target; | |
ad52b9b7 | 2736 | } |
2737 | ||
9c42dd28 | 2738 | /* If we were unable to expand via the builtin, stop the sequence |
2739 | (without outputting the insns). */ | |
2740 | end_sequence (); | |
2741 | ||
ad52b9b7 | 2742 | /* Fall back to floating point rounding optab. */ |
2743 | fallback_fndecl = mathfn_built_in (TREE_TYPE (arg), fallback_fn); | |
fc0dfa6e | 2744 | |
2745 | /* For non-C99 targets we may end up without a fallback fndecl here | |
2746 | if the user called __builtin_lfloor directly. In this case emit | |
2747 | a call to the floor/ceil variants nevertheless. This should result | |
2748 | in the best user experience for not full C99 targets. */ | |
2749 | if (fallback_fndecl == NULL_TREE) | |
2750 | { | |
2751 | tree fntype; | |
2752 | const char *name = NULL; | |
2753 | ||
2754 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2755 | { | |
80ff6494 | 2756 | case BUILT_IN_ICEIL: |
fc0dfa6e | 2757 | case BUILT_IN_LCEIL: |
2758 | case BUILT_IN_LLCEIL: | |
2759 | name = "ceil"; | |
2760 | break; | |
80ff6494 | 2761 | case BUILT_IN_ICEILF: |
fc0dfa6e | 2762 | case BUILT_IN_LCEILF: |
2763 | case BUILT_IN_LLCEILF: | |
2764 | name = "ceilf"; | |
2765 | break; | |
80ff6494 | 2766 | case BUILT_IN_ICEILL: |
fc0dfa6e | 2767 | case BUILT_IN_LCEILL: |
2768 | case BUILT_IN_LLCEILL: | |
2769 | name = "ceill"; | |
2770 | break; | |
80ff6494 | 2771 | case BUILT_IN_IFLOOR: |
fc0dfa6e | 2772 | case BUILT_IN_LFLOOR: |
2773 | case BUILT_IN_LLFLOOR: | |
2774 | name = "floor"; | |
2775 | break; | |
80ff6494 | 2776 | case BUILT_IN_IFLOORF: |
fc0dfa6e | 2777 | case BUILT_IN_LFLOORF: |
2778 | case BUILT_IN_LLFLOORF: | |
2779 | name = "floorf"; | |
2780 | break; | |
80ff6494 | 2781 | case BUILT_IN_IFLOORL: |
fc0dfa6e | 2782 | case BUILT_IN_LFLOORL: |
2783 | case BUILT_IN_LLFLOORL: | |
2784 | name = "floorl"; | |
2785 | break; | |
2786 | default: | |
2787 | gcc_unreachable (); | |
2788 | } | |
2789 | ||
2790 | fntype = build_function_type_list (TREE_TYPE (arg), | |
2791 | TREE_TYPE (arg), NULL_TREE); | |
2792 | fallback_fndecl = build_fn_decl (name, fntype); | |
2793 | } | |
2794 | ||
0568e9c1 | 2795 | exp = build_call_nofold_loc (EXPR_LOCATION (exp), fallback_fndecl, 1, arg); |
ad52b9b7 | 2796 | |
d4c690af | 2797 | tmp = expand_normal (exp); |
933eb13a | 2798 | tmp = maybe_emit_group_store (tmp, TREE_TYPE (exp)); |
ad52b9b7 | 2799 | |
2800 | /* Truncate the result of floating point optab to integer | |
2801 | via expand_fix (). */ | |
2802 | target = gen_reg_rtx (mode); | |
2803 | expand_fix (target, tmp, 0); | |
2804 | ||
2805 | return target; | |
2806 | } | |
2807 | ||
7d3afc77 | 2808 | /* Expand a call to one of the builtin math functions doing integer |
2809 | conversion (lrint). | |
2810 | Return 0 if a normal call should be emitted rather than expanding the | |
2811 | function in-line. EXP is the expression that is a call to the builtin | |
ff1b14e4 | 2812 | function; if convenient, the result should be placed in TARGET. */ |
7d3afc77 | 2813 | |
2814 | static rtx | |
ff1b14e4 | 2815 | expand_builtin_int_roundingfn_2 (tree exp, rtx target) |
7d3afc77 | 2816 | { |
5f51ee59 | 2817 | convert_optab builtin_optab; |
1e0c0b35 | 2818 | rtx op0; |
2819 | rtx_insn *insns; | |
7d3afc77 | 2820 | tree fndecl = get_callee_fndecl (exp); |
4de0924f | 2821 | tree arg; |
3754d046 | 2822 | machine_mode mode; |
e951f9a4 | 2823 | enum built_in_function fallback_fn = BUILT_IN_NONE; |
7d3afc77 | 2824 | |
c2f47e15 | 2825 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
2826 | gcc_unreachable (); | |
48e1416a | 2827 | |
c2f47e15 | 2828 | arg = CALL_EXPR_ARG (exp, 0); |
7d3afc77 | 2829 | |
2830 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2831 | { | |
80ff6494 | 2832 | CASE_FLT_FN (BUILT_IN_IRINT): |
e951f9a4 | 2833 | fallback_fn = BUILT_IN_LRINT; |
3c77f69c | 2834 | gcc_fallthrough (); |
7d3afc77 | 2835 | CASE_FLT_FN (BUILT_IN_LRINT): |
2836 | CASE_FLT_FN (BUILT_IN_LLRINT): | |
e951f9a4 | 2837 | builtin_optab = lrint_optab; |
2838 | break; | |
80ff6494 | 2839 | |
2840 | CASE_FLT_FN (BUILT_IN_IROUND): | |
e951f9a4 | 2841 | fallback_fn = BUILT_IN_LROUND; |
3c77f69c | 2842 | gcc_fallthrough (); |
ef2f1a10 | 2843 | CASE_FLT_FN (BUILT_IN_LROUND): |
2844 | CASE_FLT_FN (BUILT_IN_LLROUND): | |
e951f9a4 | 2845 | builtin_optab = lround_optab; |
2846 | break; | |
80ff6494 | 2847 | |
7d3afc77 | 2848 | default: |
2849 | gcc_unreachable (); | |
2850 | } | |
2851 | ||
e951f9a4 | 2852 | /* There's no easy way to detect the case we need to set EDOM. */ |
2853 | if (flag_errno_math && fallback_fn == BUILT_IN_NONE) | |
2854 | return NULL_RTX; | |
2855 | ||
7d3afc77 | 2856 | /* Make a suitable register to place result in. */ |
2857 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
2858 | ||
e951f9a4 | 2859 | /* There's no easy way to detect the case we need to set EDOM. */ |
2860 | if (!flag_errno_math) | |
2861 | { | |
de2e453e | 2862 | rtx result = gen_reg_rtx (mode); |
7d3afc77 | 2863 | |
e951f9a4 | 2864 | /* Wrap the computation of the argument in a SAVE_EXPR, as we may |
2865 | need to expand the argument again. This way, we will not perform | |
2866 | side-effects more the once. */ | |
2867 | CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg); | |
7d3afc77 | 2868 | |
e951f9a4 | 2869 | op0 = expand_expr (arg, NULL, VOIDmode, EXPAND_NORMAL); |
7d3afc77 | 2870 | |
e951f9a4 | 2871 | start_sequence (); |
7d3afc77 | 2872 | |
de2e453e | 2873 | if (expand_sfix_optab (result, op0, builtin_optab)) |
e951f9a4 | 2874 | { |
2875 | /* Output the entire sequence. */ | |
2876 | insns = get_insns (); | |
2877 | end_sequence (); | |
2878 | emit_insn (insns); | |
de2e453e | 2879 | return result; |
e951f9a4 | 2880 | } |
2881 | ||
2882 | /* If we were unable to expand via the builtin, stop the sequence | |
2883 | (without outputting the insns) and call to the library function | |
2884 | with the stabilized argument list. */ | |
7d3afc77 | 2885 | end_sequence (); |
2886 | } | |
2887 | ||
e951f9a4 | 2888 | if (fallback_fn != BUILT_IN_NONE) |
2889 | { | |
2890 | /* Fall back to rounding to long int. Use implicit_p 0 - for non-C99 | |
2891 | targets, (int) round (x) should never be transformed into | |
2892 | BUILT_IN_IROUND and if __builtin_iround is called directly, emit | |
2893 | a call to lround in the hope that the target provides at least some | |
2894 | C99 functions. This should result in the best user experience for | |
2895 | not full C99 targets. */ | |
e3240774 | 2896 | tree fallback_fndecl = mathfn_built_in_1 |
2897 | (TREE_TYPE (arg), as_combined_fn (fallback_fn), 0); | |
e951f9a4 | 2898 | |
2899 | exp = build_call_nofold_loc (EXPR_LOCATION (exp), | |
2900 | fallback_fndecl, 1, arg); | |
2901 | ||
2902 | target = expand_call (exp, NULL_RTX, target == const0_rtx); | |
933eb13a | 2903 | target = maybe_emit_group_store (target, TREE_TYPE (exp)); |
e951f9a4 | 2904 | return convert_to_mode (mode, target, 0); |
2905 | } | |
5f51ee59 | 2906 | |
de2e453e | 2907 | return expand_call (exp, target, target == const0_rtx); |
7d3afc77 | 2908 | } |
2909 | ||
c2f47e15 | 2910 | /* Expand a call to the powi built-in mathematical function. Return NULL_RTX if |
757c219d | 2911 | a normal call should be emitted rather than expanding the function |
2912 | in-line. EXP is the expression that is a call to the builtin | |
2913 | function; if convenient, the result should be placed in TARGET. */ | |
2914 | ||
2915 | static rtx | |
f97eea22 | 2916 | expand_builtin_powi (tree exp, rtx target) |
757c219d | 2917 | { |
757c219d | 2918 | tree arg0, arg1; |
2919 | rtx op0, op1; | |
3754d046 | 2920 | machine_mode mode; |
2921 | machine_mode mode2; | |
757c219d | 2922 | |
c2f47e15 | 2923 | if (! validate_arglist (exp, REAL_TYPE, INTEGER_TYPE, VOID_TYPE)) |
2924 | return NULL_RTX; | |
757c219d | 2925 | |
c2f47e15 | 2926 | arg0 = CALL_EXPR_ARG (exp, 0); |
2927 | arg1 = CALL_EXPR_ARG (exp, 1); | |
757c219d | 2928 | mode = TYPE_MODE (TREE_TYPE (exp)); |
2929 | ||
757c219d | 2930 | /* Emit a libcall to libgcc. */ |
2931 | ||
c2f47e15 | 2932 | /* Mode of the 2nd argument must match that of an int. */ |
517be012 | 2933 | mode2 = int_mode_for_size (INT_TYPE_SIZE, 0).require (); |
d0405f40 | 2934 | |
757c219d | 2935 | if (target == NULL_RTX) |
2936 | target = gen_reg_rtx (mode); | |
2937 | ||
f97eea22 | 2938 | op0 = expand_expr (arg0, NULL_RTX, mode, EXPAND_NORMAL); |
757c219d | 2939 | if (GET_MODE (op0) != mode) |
2940 | op0 = convert_to_mode (mode, op0, 0); | |
1db6d067 | 2941 | op1 = expand_expr (arg1, NULL_RTX, mode2, EXPAND_NORMAL); |
d0405f40 | 2942 | if (GET_MODE (op1) != mode2) |
2943 | op1 = convert_to_mode (mode2, op1, 0); | |
757c219d | 2944 | |
f36b9f69 | 2945 | target = emit_library_call_value (optab_libfunc (powi_optab, mode), |
9e9e5c15 | 2946 | target, LCT_CONST, mode, |
d0405f40 | 2947 | op0, mode, op1, mode2); |
757c219d | 2948 | |
2949 | return target; | |
2950 | } | |
2951 | ||
48e1416a | 2952 | /* Expand expression EXP which is a call to the strlen builtin. Return |
864bd5de | 2953 | NULL_RTX if we failed and the caller should emit a normal call, otherwise |
aed0bd19 | 2954 | try to get the result in TARGET, if convenient. */ |
f7c44134 | 2955 | |
53800dbe | 2956 | static rtx |
c2f47e15 | 2957 | expand_builtin_strlen (tree exp, rtx target, |
3754d046 | 2958 | machine_mode target_mode) |
53800dbe | 2959 | { |
c2f47e15 | 2960 | if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) |
2961 | return NULL_RTX; | |
6248e345 | 2962 | |
5c5d012b | 2963 | struct expand_operand ops[4]; |
2964 | rtx pat; | |
2965 | tree len; | |
2966 | tree src = CALL_EXPR_ARG (exp, 0); | |
2967 | rtx src_reg; | |
2968 | rtx_insn *before_strlen; | |
2969 | machine_mode insn_mode; | |
2970 | enum insn_code icode = CODE_FOR_nothing; | |
2971 | unsigned int align; | |
681fab1e | 2972 | |
5c5d012b | 2973 | /* If the length can be computed at compile-time, return it. */ |
2974 | len = c_strlen (src, 0); | |
2975 | if (len) | |
2976 | return expand_expr (len, target, target_mode, EXPAND_NORMAL); | |
2977 | ||
2978 | /* If the length can be computed at compile-time and is constant | |
2979 | integer, but there are side-effects in src, evaluate | |
2980 | src for side-effects, then return len. | |
2981 | E.g. x = strlen (i++ ? "xfoo" + 1 : "bar"); | |
2982 | can be optimized into: i++; x = 3; */ | |
2983 | len = c_strlen (src, 1); | |
2984 | if (len && TREE_CODE (len) == INTEGER_CST) | |
2985 | { | |
2986 | expand_expr (src, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2987 | return expand_expr (len, target, target_mode, EXPAND_NORMAL); | |
2988 | } | |
53800dbe | 2989 | |
5c5d012b | 2990 | align = get_pointer_alignment (src) / BITS_PER_UNIT; |
53800dbe | 2991 | |
5c5d012b | 2992 | /* If SRC is not a pointer type, don't do this operation inline. */ |
2993 | if (align == 0) | |
2994 | return NULL_RTX; | |
2995 | ||
2996 | /* Bail out if we can't compute strlen in the right mode. */ | |
2997 | FOR_EACH_MODE_FROM (insn_mode, target_mode) | |
2998 | { | |
2999 | icode = optab_handler (strlen_optab, insn_mode); | |
3000 | if (icode != CODE_FOR_nothing) | |
3001 | break; | |
3002 | } | |
3003 | if (insn_mode == VOIDmode) | |
3004 | return NULL_RTX; | |
53800dbe | 3005 | |
5c5d012b | 3006 | /* Make a place to hold the source address. We will not expand |
3007 | the actual source until we are sure that the expansion will | |
3008 | not fail -- there are trees that cannot be expanded twice. */ | |
3009 | src_reg = gen_reg_rtx (Pmode); | |
53800dbe | 3010 | |
5c5d012b | 3011 | /* Mark the beginning of the strlen sequence so we can emit the |
3012 | source operand later. */ | |
3013 | before_strlen = get_last_insn (); | |
53800dbe | 3014 | |
5c5d012b | 3015 | create_output_operand (&ops[0], target, insn_mode); |
3016 | create_fixed_operand (&ops[1], gen_rtx_MEM (BLKmode, src_reg)); | |
3017 | create_integer_operand (&ops[2], 0); | |
3018 | create_integer_operand (&ops[3], align); | |
3019 | if (!maybe_expand_insn (icode, 4, ops)) | |
3020 | return NULL_RTX; | |
911c0150 | 3021 | |
5c5d012b | 3022 | /* Check to see if the argument was declared attribute nonstring |
3023 | and if so, issue a warning since at this point it's not known | |
3024 | to be nul-terminated. */ | |
3025 | maybe_warn_nonstring_arg (get_callee_fndecl (exp), exp); | |
0c45740b | 3026 | |
5c5d012b | 3027 | /* Now that we are assured of success, expand the source. */ |
3028 | start_sequence (); | |
3029 | pat = expand_expr (src, src_reg, Pmode, EXPAND_NORMAL); | |
3030 | if (pat != src_reg) | |
3031 | { | |
499eee58 | 3032 | #ifdef POINTERS_EXTEND_UNSIGNED |
5c5d012b | 3033 | if (GET_MODE (pat) != Pmode) |
3034 | pat = convert_to_mode (Pmode, pat, | |
3035 | POINTERS_EXTEND_UNSIGNED); | |
499eee58 | 3036 | #endif |
5c5d012b | 3037 | emit_move_insn (src_reg, pat); |
3038 | } | |
3039 | pat = get_insns (); | |
3040 | end_sequence (); | |
bceb0d1f | 3041 | |
5c5d012b | 3042 | if (before_strlen) |
3043 | emit_insn_after (pat, before_strlen); | |
3044 | else | |
3045 | emit_insn_before (pat, get_insns ()); | |
53800dbe | 3046 | |
5c5d012b | 3047 | /* Return the value in the proper mode for this function. */ |
3048 | if (GET_MODE (ops[0].value) == target_mode) | |
3049 | target = ops[0].value; | |
3050 | else if (target != 0) | |
3051 | convert_move (target, ops[0].value, 0); | |
3052 | else | |
3053 | target = convert_to_mode (target_mode, ops[0].value, 0); | |
911c0150 | 3054 | |
5c5d012b | 3055 | return target; |
53800dbe | 3056 | } |
3057 | ||
864bd5de | 3058 | /* Expand call EXP to the strnlen built-in, returning the result |
3059 | and setting it in TARGET. Otherwise return NULL_RTX on failure. */ | |
3060 | ||
3061 | static rtx | |
3062 | expand_builtin_strnlen (tree exp, rtx target, machine_mode target_mode) | |
3063 | { | |
3064 | if (!validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
3065 | return NULL_RTX; | |
3066 | ||
3067 | tree src = CALL_EXPR_ARG (exp, 0); | |
3068 | tree bound = CALL_EXPR_ARG (exp, 1); | |
3069 | ||
3070 | if (!bound) | |
3071 | return NULL_RTX; | |
3072 | ||
3073 | location_t loc = UNKNOWN_LOCATION; | |
3074 | if (EXPR_HAS_LOCATION (exp)) | |
3075 | loc = EXPR_LOCATION (exp); | |
3076 | ||
3077 | tree maxobjsize = max_object_size (); | |
3078 | tree func = get_callee_fndecl (exp); | |
3079 | ||
55769ed6 | 3080 | /* FIXME: Change c_strlen() to return sizetype instead of ssizetype |
3081 | so these conversions aren't necessary. */ | |
fec27bf2 | 3082 | c_strlen_data data; |
3083 | memset (&data, 0, sizeof (c_strlen_data)); | |
3084 | tree len = c_strlen (src, 0, &data, 1); | |
55769ed6 | 3085 | if (len) |
3086 | len = fold_convert_loc (loc, TREE_TYPE (bound), len); | |
864bd5de | 3087 | |
3088 | if (TREE_CODE (bound) == INTEGER_CST) | |
3089 | { | |
3090 | if (!TREE_NO_WARNING (exp) | |
3091 | && tree_int_cst_lt (maxobjsize, bound) | |
3092 | && warning_at (loc, OPT_Wstringop_overflow_, | |
3093 | "%K%qD specified bound %E " | |
3094 | "exceeds maximum object size %E", | |
3095 | exp, func, bound, maxobjsize)) | |
3096 | TREE_NO_WARNING (exp) = true; | |
3097 | ||
fec27bf2 | 3098 | bool exact = true; |
864bd5de | 3099 | if (!len || TREE_CODE (len) != INTEGER_CST) |
fec27bf2 | 3100 | { |
3101 | /* Clear EXACT if LEN may be less than SRC suggests, | |
3102 | such as in | |
3103 | strnlen (&a[i], sizeof a) | |
3104 | where the value of i is unknown. Unless i's value is | |
3105 | zero, the call is unsafe because the bound is greater. */ | |
3106 | data.decl = unterminated_array (src, &len, &exact); | |
3107 | if (!data.decl) | |
3108 | return NULL_RTX; | |
3109 | } | |
3110 | ||
3111 | if (data.decl | |
3112 | && !TREE_NO_WARNING (exp) | |
3113 | && ((tree_int_cst_lt (len, bound)) | |
3114 | || !exact)) | |
3115 | { | |
3116 | location_t warnloc | |
3117 | = expansion_point_location_if_in_system_header (loc); | |
3118 | ||
3119 | if (warning_at (warnloc, OPT_Wstringop_overflow_, | |
3120 | exact | |
3121 | ? G_("%K%qD specified bound %E exceeds the size %E " | |
3122 | "of unterminated array") | |
3123 | : G_("%K%qD specified bound %E may exceed the size " | |
3124 | "of at most %E of unterminated array"), | |
3125 | exp, func, bound, len)) | |
3126 | { | |
3127 | inform (DECL_SOURCE_LOCATION (data.decl), | |
3128 | "referenced argument declared here"); | |
3129 | TREE_NO_WARNING (exp) = true; | |
3130 | return NULL_RTX; | |
3131 | } | |
3132 | } | |
3133 | ||
3134 | if (!len) | |
864bd5de | 3135 | return NULL_RTX; |
3136 | ||
864bd5de | 3137 | len = fold_build2_loc (loc, MIN_EXPR, size_type_node, len, bound); |
3138 | return expand_expr (len, target, target_mode, EXPAND_NORMAL); | |
3139 | } | |
3140 | ||
3141 | if (TREE_CODE (bound) != SSA_NAME) | |
3142 | return NULL_RTX; | |
3143 | ||
3144 | wide_int min, max; | |
be44111e | 3145 | enum value_range_kind rng = get_range_info (bound, &min, &max); |
864bd5de | 3146 | if (rng != VR_RANGE) |
3147 | return NULL_RTX; | |
3148 | ||
3149 | if (!TREE_NO_WARNING (exp) | |
3150 | && wi::ltu_p (wi::to_wide (maxobjsize), min) | |
3151 | && warning_at (loc, OPT_Wstringop_overflow_, | |
3152 | "%K%qD specified bound [%wu, %wu] " | |
3153 | "exceeds maximum object size %E", | |
3154 | exp, func, min.to_uhwi (), max.to_uhwi (), maxobjsize)) | |
3155 | TREE_NO_WARNING (exp) = true; | |
3156 | ||
179f1960 | 3157 | bool exact = true; |
864bd5de | 3158 | if (!len || TREE_CODE (len) != INTEGER_CST) |
179f1960 | 3159 | { |
3160 | data.decl = unterminated_array (src, &len, &exact); | |
3161 | if (!data.decl) | |
3162 | return NULL_RTX; | |
3163 | } | |
864bd5de | 3164 | |
179f1960 | 3165 | if (data.decl |
3166 | && !TREE_NO_WARNING (exp) | |
3167 | && (wi::ltu_p (wi::to_wide (len), min) | |
3168 | || !exact)) | |
fec27bf2 | 3169 | { |
179f1960 | 3170 | location_t warnloc |
3171 | = expansion_point_location_if_in_system_header (loc); | |
3172 | ||
3173 | if (warning_at (warnloc, OPT_Wstringop_overflow_, | |
3174 | exact | |
3175 | ? G_("%K%qD specified bound [%wu, %wu] exceeds " | |
3176 | "the size %E of unterminated array") | |
3177 | : G_("%K%qD specified bound [%wu, %wu] may exceed " | |
3178 | "the size of at most %E of unterminated array"), | |
3179 | exp, func, min.to_uhwi (), max.to_uhwi (), len)) | |
3180 | { | |
3181 | inform (DECL_SOURCE_LOCATION (data.decl), | |
3182 | "referenced argument declared here"); | |
3183 | TREE_NO_WARNING (exp) = true; | |
3184 | } | |
fec27bf2 | 3185 | } |
3186 | ||
179f1960 | 3187 | if (data.decl) |
3188 | return NULL_RTX; | |
3189 | ||
864bd5de | 3190 | if (wi::gtu_p (min, wi::to_wide (len))) |
3191 | return expand_expr (len, target, target_mode, EXPAND_NORMAL); | |
3192 | ||
3193 | len = fold_build2_loc (loc, MIN_EXPR, TREE_TYPE (len), len, bound); | |
3194 | return expand_expr (len, target, target_mode, EXPAND_NORMAL); | |
3195 | } | |
3196 | ||
6840589f | 3197 | /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE) |
3198 | bytes from constant string DATA + OFFSET and return it as target | |
3199 | constant. */ | |
3200 | ||
3201 | static rtx | |
aecda0d6 | 3202 | builtin_memcpy_read_str (void *data, HOST_WIDE_INT offset, |
f77c4496 | 3203 | scalar_int_mode mode) |
6840589f | 3204 | { |
3205 | const char *str = (const char *) data; | |
3206 | ||
64db345d | 3207 | gcc_assert (offset >= 0 |
3208 | && ((unsigned HOST_WIDE_INT) offset + GET_MODE_SIZE (mode) | |
3209 | <= strlen (str) + 1)); | |
6840589f | 3210 | |
3211 | return c_readstr (str + offset, mode); | |
3212 | } | |
3213 | ||
36d63243 | 3214 | /* LEN specify length of the block of memcpy/memset operation. |
9db0f34d | 3215 | Figure out its range and put it into MIN_SIZE/MAX_SIZE. |
3216 | In some cases we can make very likely guess on max size, then we | |
3217 | set it into PROBABLE_MAX_SIZE. */ | |
36d63243 | 3218 | |
3219 | static void | |
3220 | determine_block_size (tree len, rtx len_rtx, | |
3221 | unsigned HOST_WIDE_INT *min_size, | |
9db0f34d | 3222 | unsigned HOST_WIDE_INT *max_size, |
3223 | unsigned HOST_WIDE_INT *probable_max_size) | |
36d63243 | 3224 | { |
3225 | if (CONST_INT_P (len_rtx)) | |
3226 | { | |
4e140a5c | 3227 | *min_size = *max_size = *probable_max_size = UINTVAL (len_rtx); |
36d63243 | 3228 | return; |
3229 | } | |
3230 | else | |
3231 | { | |
9c1be15e | 3232 | wide_int min, max; |
be44111e | 3233 | enum value_range_kind range_type = VR_UNDEFINED; |
9db0f34d | 3234 | |
3235 | /* Determine bounds from the type. */ | |
3236 | if (tree_fits_uhwi_p (TYPE_MIN_VALUE (TREE_TYPE (len)))) | |
3237 | *min_size = tree_to_uhwi (TYPE_MIN_VALUE (TREE_TYPE (len))); | |
3238 | else | |
3239 | *min_size = 0; | |
3240 | if (tree_fits_uhwi_p (TYPE_MAX_VALUE (TREE_TYPE (len)))) | |
4e140a5c | 3241 | *probable_max_size = *max_size |
3242 | = tree_to_uhwi (TYPE_MAX_VALUE (TREE_TYPE (len))); | |
9db0f34d | 3243 | else |
3244 | *probable_max_size = *max_size = GET_MODE_MASK (GET_MODE (len_rtx)); | |
3245 | ||
3246 | if (TREE_CODE (len) == SSA_NAME) | |
3247 | range_type = get_range_info (len, &min, &max); | |
3248 | if (range_type == VR_RANGE) | |
36d63243 | 3249 | { |
fe5ad926 | 3250 | if (wi::fits_uhwi_p (min) && *min_size < min.to_uhwi ()) |
36d63243 | 3251 | *min_size = min.to_uhwi (); |
fe5ad926 | 3252 | if (wi::fits_uhwi_p (max) && *max_size > max.to_uhwi ()) |
9db0f34d | 3253 | *probable_max_size = *max_size = max.to_uhwi (); |
36d63243 | 3254 | } |
9db0f34d | 3255 | else if (range_type == VR_ANTI_RANGE) |
36d63243 | 3256 | { |
4a474a5a | 3257 | /* Anti range 0...N lets us to determine minimal size to N+1. */ |
fe5ad926 | 3258 | if (min == 0) |
9db0f34d | 3259 | { |
9c1be15e | 3260 | if (wi::fits_uhwi_p (max) && max.to_uhwi () + 1 != 0) |
3261 | *min_size = max.to_uhwi () + 1; | |
9db0f34d | 3262 | } |
3263 | /* Code like | |
3264 | ||
3265 | int n; | |
3266 | if (n < 100) | |
4a474a5a | 3267 | memcpy (a, b, n) |
9db0f34d | 3268 | |
3269 | Produce anti range allowing negative values of N. We still | |
3270 | can use the information and make a guess that N is not negative. | |
3271 | */ | |
fe5ad926 | 3272 | else if (!wi::leu_p (max, 1 << 30) && wi::fits_uhwi_p (min)) |
3273 | *probable_max_size = min.to_uhwi () - 1; | |
36d63243 | 3274 | } |
3275 | } | |
3276 | gcc_checking_assert (*max_size <= | |
3277 | (unsigned HOST_WIDE_INT) | |
3278 | GET_MODE_MASK (GET_MODE (len_rtx))); | |
3279 | } | |
3280 | ||
5aef8938 | 3281 | /* Try to verify that the sizes and lengths of the arguments to a string |
3282 | manipulation function given by EXP are within valid bounds and that | |
e6a18b5a | 3283 | the operation does not lead to buffer overflow or read past the end. |
3284 | Arguments other than EXP may be null. When non-null, the arguments | |
3285 | have the following meaning: | |
3286 | DST is the destination of a copy call or NULL otherwise. | |
3287 | SRC is the source of a copy call or NULL otherwise. | |
3288 | DSTWRITE is the number of bytes written into the destination obtained | |
3289 | from the user-supplied size argument to the function (such as in | |
3290 | memcpy(DST, SRCs, DSTWRITE) or strncpy(DST, DRC, DSTWRITE). | |
3291 | MAXREAD is the user-supplied bound on the length of the source sequence | |
5aef8938 | 3292 | (such as in strncat(d, s, N). It specifies the upper limit on the number |
e6a18b5a | 3293 | of bytes to write. If NULL, it's taken to be the same as DSTWRITE. |
3294 | SRCSTR is the source string (such as in strcpy(DST, SRC)) when the | |
3295 | expression EXP is a string function call (as opposed to a memory call | |
3296 | like memcpy). As an exception, SRCSTR can also be an integer denoting | |
3297 | the precomputed size of the source string or object (for functions like | |
3298 | memcpy). | |
3299 | DSTSIZE is the size of the destination object specified by the last | |
5aef8938 | 3300 | argument to the _chk builtins, typically resulting from the expansion |
e6a18b5a | 3301 | of __builtin_object_size (such as in __builtin___strcpy_chk(DST, SRC, |
3302 | DSTSIZE). | |
5aef8938 | 3303 | |
e6a18b5a | 3304 | When DSTWRITE is null LEN is checked to verify that it doesn't exceed |
5aef8938 | 3305 | SIZE_MAX. |
3306 | ||
e6a18b5a | 3307 | If the call is successfully verified as safe return true, otherwise |
3308 | return false. */ | |
5aef8938 | 3309 | |
3310 | static bool | |
e6a18b5a | 3311 | check_access (tree exp, tree, tree, tree dstwrite, |
3312 | tree maxread, tree srcstr, tree dstsize) | |
5aef8938 | 3313 | { |
e6a18b5a | 3314 | int opt = OPT_Wstringop_overflow_; |
3315 | ||
5aef8938 | 3316 | /* The size of the largest object is half the address space, or |
e6a18b5a | 3317 | PTRDIFF_MAX. (This is way too permissive.) */ |
3318 | tree maxobjsize = max_object_size (); | |
5aef8938 | 3319 | |
e6a18b5a | 3320 | /* Either the length of the source string for string functions or |
3321 | the size of the source object for raw memory functions. */ | |
5aef8938 | 3322 | tree slen = NULL_TREE; |
3323 | ||
8d6c6ef5 | 3324 | tree range[2] = { NULL_TREE, NULL_TREE }; |
3325 | ||
5aef8938 | 3326 | /* Set to true when the exact number of bytes written by a string |
3327 | function like strcpy is not known and the only thing that is | |
3328 | known is that it must be at least one (for the terminating nul). */ | |
3329 | bool at_least_one = false; | |
e6a18b5a | 3330 | if (srcstr) |
5aef8938 | 3331 | { |
e6a18b5a | 3332 | /* SRCSTR is normally a pointer to string but as a special case |
5aef8938 | 3333 | it can be an integer denoting the length of a string. */ |
e6a18b5a | 3334 | if (POINTER_TYPE_P (TREE_TYPE (srcstr))) |
5aef8938 | 3335 | { |
3336 | /* Try to determine the range of lengths the source string | |
8d6c6ef5 | 3337 | refers to. If it can be determined and is less than |
e6a18b5a | 3338 | the upper bound given by MAXREAD add one to it for |
5aef8938 | 3339 | the terminating nul. Otherwise, set it to one for |
e6a18b5a | 3340 | the same reason, or to MAXREAD as appropriate. */ |
3341 | get_range_strlen (srcstr, range); | |
3342 | if (range[0] && (!maxread || TREE_CODE (maxread) == INTEGER_CST)) | |
8d6c6ef5 | 3343 | { |
e6a18b5a | 3344 | if (maxread && tree_int_cst_le (maxread, range[0])) |
3345 | range[0] = range[1] = maxread; | |
8d6c6ef5 | 3346 | else |
3347 | range[0] = fold_build2 (PLUS_EXPR, size_type_node, | |
3348 | range[0], size_one_node); | |
3349 | ||
e6a18b5a | 3350 | if (maxread && tree_int_cst_le (maxread, range[1])) |
3351 | range[1] = maxread; | |
8d6c6ef5 | 3352 | else if (!integer_all_onesp (range[1])) |
3353 | range[1] = fold_build2 (PLUS_EXPR, size_type_node, | |
3354 | range[1], size_one_node); | |
3355 | ||
3356 | slen = range[0]; | |
3357 | } | |
5aef8938 | 3358 | else |
3359 | { | |
3360 | at_least_one = true; | |
3361 | slen = size_one_node; | |
3362 | } | |
3363 | } | |
3364 | else | |
e6a18b5a | 3365 | slen = srcstr; |
5aef8938 | 3366 | } |
3367 | ||
e6a18b5a | 3368 | if (!dstwrite && !maxread) |
5aef8938 | 3369 | { |
3370 | /* When the only available piece of data is the object size | |
3371 | there is nothing to do. */ | |
3372 | if (!slen) | |
3373 | return true; | |
3374 | ||
3375 | /* Otherwise, when the length of the source sequence is known | |
e6a18b5a | 3376 | (as with strlen), set DSTWRITE to it. */ |
8d6c6ef5 | 3377 | if (!range[0]) |
e6a18b5a | 3378 | dstwrite = slen; |
5aef8938 | 3379 | } |
3380 | ||
e6a18b5a | 3381 | if (!dstsize) |
3382 | dstsize = maxobjsize; | |
5aef8938 | 3383 | |
e6a18b5a | 3384 | if (dstwrite) |
3385 | get_size_range (dstwrite, range); | |
5aef8938 | 3386 | |
e6a18b5a | 3387 | tree func = get_callee_fndecl (exp); |
5aef8938 | 3388 | |
3389 | /* First check the number of bytes to be written against the maximum | |
3390 | object size. */ | |
c4183f31 | 3391 | if (range[0] |
3392 | && TREE_CODE (range[0]) == INTEGER_CST | |
3393 | && tree_int_cst_lt (maxobjsize, range[0])) | |
5aef8938 | 3394 | { |
864bd5de | 3395 | if (TREE_NO_WARNING (exp)) |
3396 | return false; | |
3397 | ||
5aef8938 | 3398 | location_t loc = tree_nonartificial_location (exp); |
4d317237 | 3399 | loc = expansion_point_location_if_in_system_header (loc); |
5aef8938 | 3400 | |
864bd5de | 3401 | bool warned; |
5aef8938 | 3402 | if (range[0] == range[1]) |
864bd5de | 3403 | warned = warning_at (loc, opt, |
3404 | "%K%qD specified size %E " | |
3405 | "exceeds maximum object size %E", | |
3406 | exp, func, range[0], maxobjsize); | |
3407 | else | |
3408 | warned = warning_at (loc, opt, | |
3409 | "%K%qD specified size between %E and %E " | |
3410 | "exceeds maximum object size %E", | |
3411 | exp, func, | |
3412 | range[0], range[1], maxobjsize); | |
3413 | if (warned) | |
3414 | TREE_NO_WARNING (exp) = true; | |
3415 | ||
5aef8938 | 3416 | return false; |
3417 | } | |
3418 | ||
e6a18b5a | 3419 | /* The number of bytes to write is "exact" if DSTWRITE is non-null, |
3420 | constant, and in range of unsigned HOST_WIDE_INT. */ | |
3421 | bool exactwrite = dstwrite && tree_fits_uhwi_p (dstwrite); | |
3422 | ||
5aef8938 | 3423 | /* Next check the number of bytes to be written against the destination |
3424 | object size. */ | |
e6a18b5a | 3425 | if (range[0] || !exactwrite || integer_all_onesp (dstwrite)) |
5aef8938 | 3426 | { |
3427 | if (range[0] | |
c4183f31 | 3428 | && TREE_CODE (range[0]) == INTEGER_CST |
e6a18b5a | 3429 | && ((tree_fits_uhwi_p (dstsize) |
3430 | && tree_int_cst_lt (dstsize, range[0])) | |
c4183f31 | 3431 | || (dstwrite |
3432 | && tree_fits_uhwi_p (dstwrite) | |
e6a18b5a | 3433 | && tree_int_cst_lt (dstwrite, range[0])))) |
5aef8938 | 3434 | { |
080a1363 | 3435 | if (TREE_NO_WARNING (exp)) |
3436 | return false; | |
3437 | ||
5aef8938 | 3438 | location_t loc = tree_nonartificial_location (exp); |
4d317237 | 3439 | loc = expansion_point_location_if_in_system_header (loc); |
5aef8938 | 3440 | |
e6a18b5a | 3441 | if (dstwrite == slen && at_least_one) |
8d6c6ef5 | 3442 | { |
3443 | /* This is a call to strcpy with a destination of 0 size | |
3444 | and a source of unknown length. The call will write | |
3445 | at least one byte past the end of the destination. */ | |
3446 | warning_at (loc, opt, | |
9098b938 | 3447 | "%K%qD writing %E or more bytes into a region " |
8d6c6ef5 | 3448 | "of size %E overflows the destination", |
e6a18b5a | 3449 | exp, func, range[0], dstsize); |
8d6c6ef5 | 3450 | } |
3451 | else if (tree_int_cst_equal (range[0], range[1])) | |
625a4dfc | 3452 | warning_n (loc, opt, tree_to_uhwi (range[0]), |
3453 | "%K%qD writing %E byte into a region " | |
3454 | "of size %E overflows the destination", | |
3455 | "%K%qD writing %E bytes into a region " | |
3456 | "of size %E overflows the destination", | |
3457 | exp, func, range[0], dstsize); | |
8d6c6ef5 | 3458 | else if (tree_int_cst_sign_bit (range[1])) |
3459 | { | |
3460 | /* Avoid printing the upper bound if it's invalid. */ | |
3461 | warning_at (loc, opt, | |
9098b938 | 3462 | "%K%qD writing %E or more bytes into a region " |
8d6c6ef5 | 3463 | "of size %E overflows the destination", |
e6a18b5a | 3464 | exp, func, range[0], dstsize); |
8d6c6ef5 | 3465 | } |
5aef8938 | 3466 | else |
3467 | warning_at (loc, opt, | |
9098b938 | 3468 | "%K%qD writing between %E and %E bytes into " |
8d6c6ef5 | 3469 | "a region of size %E overflows the destination", |
e6a18b5a | 3470 | exp, func, range[0], range[1], |
3471 | dstsize); | |
5aef8938 | 3472 | |
3473 | /* Return error when an overflow has been detected. */ | |
3474 | return false; | |
3475 | } | |
3476 | } | |
3477 | ||
3478 | /* Check the maximum length of the source sequence against the size | |
3479 | of the destination object if known, or against the maximum size | |
3480 | of an object. */ | |
e6a18b5a | 3481 | if (maxread) |
5aef8938 | 3482 | { |
e6a18b5a | 3483 | get_size_range (maxread, range); |
3484 | ||
3485 | /* Use the lower end for MAXREAD from now on. */ | |
3486 | if (range[0]) | |
3487 | maxread = range[0]; | |
5aef8938 | 3488 | |
e6a18b5a | 3489 | if (range[0] && dstsize && tree_fits_uhwi_p (dstsize)) |
5aef8938 | 3490 | { |
3491 | location_t loc = tree_nonartificial_location (exp); | |
4d317237 | 3492 | loc = expansion_point_location_if_in_system_header (loc); |
5aef8938 | 3493 | |
3494 | if (tree_int_cst_lt (maxobjsize, range[0])) | |
3495 | { | |
080a1363 | 3496 | if (TREE_NO_WARNING (exp)) |
3497 | return false; | |
3498 | ||
5aef8938 | 3499 | /* Warn about crazy big sizes first since that's more |
3500 | likely to be meaningful than saying that the bound | |
3501 | is greater than the object size if both are big. */ | |
3502 | if (range[0] == range[1]) | |
3503 | warning_at (loc, opt, | |
9098b938 | 3504 | "%K%qD specified bound %E " |
8d6c6ef5 | 3505 | "exceeds maximum object size %E", |
e6a18b5a | 3506 | exp, func, |
8d6c6ef5 | 3507 | range[0], maxobjsize); |
5aef8938 | 3508 | else |
3509 | warning_at (loc, opt, | |
9098b938 | 3510 | "%K%qD specified bound between %E and %E " |
8d6c6ef5 | 3511 | "exceeds maximum object size %E", |
e6a18b5a | 3512 | exp, func, |
8d6c6ef5 | 3513 | range[0], range[1], maxobjsize); |
5aef8938 | 3514 | |
3515 | return false; | |
3516 | } | |
3517 | ||
e6a18b5a | 3518 | if (dstsize != maxobjsize && tree_int_cst_lt (dstsize, range[0])) |
5aef8938 | 3519 | { |
080a1363 | 3520 | if (TREE_NO_WARNING (exp)) |
3521 | return false; | |
3522 | ||
8d6c6ef5 | 3523 | if (tree_int_cst_equal (range[0], range[1])) |
5aef8938 | 3524 | warning_at (loc, opt, |
9098b938 | 3525 | "%K%qD specified bound %E " |
8d6c6ef5 | 3526 | "exceeds destination size %E", |
e6a18b5a | 3527 | exp, func, |
3528 | range[0], dstsize); | |
5aef8938 | 3529 | else |
3530 | warning_at (loc, opt, | |
9098b938 | 3531 | "%K%qD specified bound between %E and %E " |
8d6c6ef5 | 3532 | "exceeds destination size %E", |
e6a18b5a | 3533 | exp, func, |
3534 | range[0], range[1], dstsize); | |
5aef8938 | 3535 | return false; |
3536 | } | |
3537 | } | |
3538 | } | |
3539 | ||
e6a18b5a | 3540 | /* Check for reading past the end of SRC. */ |
8d6c6ef5 | 3541 | if (slen |
e6a18b5a | 3542 | && slen == srcstr |
3543 | && dstwrite && range[0] | |
8d6c6ef5 | 3544 | && tree_int_cst_lt (slen, range[0])) |
3545 | { | |
080a1363 | 3546 | if (TREE_NO_WARNING (exp)) |
3547 | return false; | |
3548 | ||
8d6c6ef5 | 3549 | location_t loc = tree_nonartificial_location (exp); |
3550 | ||
3551 | if (tree_int_cst_equal (range[0], range[1])) | |
625a4dfc | 3552 | warning_n (loc, opt, tree_to_uhwi (range[0]), |
3553 | "%K%qD reading %E byte from a region of size %E", | |
3554 | "%K%qD reading %E bytes from a region of size %E", | |
e6a18b5a | 3555 | exp, func, range[0], slen); |
8d6c6ef5 | 3556 | else if (tree_int_cst_sign_bit (range[1])) |
3557 | { | |
3558 | /* Avoid printing the upper bound if it's invalid. */ | |
3559 | warning_at (loc, opt, | |
9098b938 | 3560 | "%K%qD reading %E or more bytes from a region " |
8d6c6ef5 | 3561 | "of size %E", |
e6a18b5a | 3562 | exp, func, range[0], slen); |
8d6c6ef5 | 3563 | } |
3564 | else | |
3565 | warning_at (loc, opt, | |
9098b938 | 3566 | "%K%qD reading between %E and %E bytes from a region " |
8d6c6ef5 | 3567 | "of size %E", |
e6a18b5a | 3568 | exp, func, range[0], range[1], slen); |
8d6c6ef5 | 3569 | return false; |
3570 | } | |
3571 | ||
5aef8938 | 3572 | return true; |
3573 | } | |
3574 | ||
3575 | /* Helper to compute the size of the object referenced by the DEST | |
d8aad786 | 3576 | expression which must have pointer type, using Object Size type |
5aef8938 | 3577 | OSTYPE (only the least significant 2 bits are used). Return |
24e3b821 | 3578 | an estimate of the size of the object if successful or NULL when |
3579 | the size cannot be determined. When the referenced object involves | |
3580 | a non-constant offset in some range the returned value represents | |
3581 | the largest size given the smallest non-negative offset in the | |
3582 | range. The function is intended for diagnostics and should not | |
3583 | be used to influence code generation or optimization. */ | |
5aef8938 | 3584 | |
d8aad786 | 3585 | tree |
8d6c6ef5 | 3586 | compute_objsize (tree dest, int ostype) |
5aef8938 | 3587 | { |
3588 | unsigned HOST_WIDE_INT size; | |
d8aad786 | 3589 | |
3590 | /* Only the two least significant bits are meaningful. */ | |
3591 | ostype &= 3; | |
3592 | ||
3593 | if (compute_builtin_object_size (dest, ostype, &size)) | |
5aef8938 | 3594 | return build_int_cst (sizetype, size); |
3595 | ||
d8aad786 | 3596 | if (TREE_CODE (dest) == SSA_NAME) |
3597 | { | |
3598 | gimple *stmt = SSA_NAME_DEF_STMT (dest); | |
3599 | if (!is_gimple_assign (stmt)) | |
3600 | return NULL_TREE; | |
3601 | ||
24e3b821 | 3602 | dest = gimple_assign_rhs1 (stmt); |
3603 | ||
d8aad786 | 3604 | tree_code code = gimple_assign_rhs_code (stmt); |
24e3b821 | 3605 | if (code == POINTER_PLUS_EXPR) |
3606 | { | |
3607 | /* compute_builtin_object_size fails for addresses with | |
3608 | non-constant offsets. Try to determine the range of | |
c1a0c86c | 3609 | such an offset here and use it to adjust the constant |
24e3b821 | 3610 | size. */ |
3611 | tree off = gimple_assign_rhs2 (stmt); | |
c1a0c86c | 3612 | if (TREE_CODE (off) == INTEGER_CST) |
3613 | { | |
3614 | if (tree size = compute_objsize (dest, ostype)) | |
3615 | { | |
3616 | wide_int wioff = wi::to_wide (off); | |
3617 | wide_int wisiz = wi::to_wide (size); | |
3618 | ||
3619 | /* Ignore negative offsets for now. For others, | |
3620 | use the lower bound as the most optimistic | |
3621 | estimate of the (remaining) size. */ | |
3622 | if (wi::sign_mask (wioff)) | |
3623 | ; | |
3624 | else if (wi::ltu_p (wioff, wisiz)) | |
3625 | return wide_int_to_tree (TREE_TYPE (size), | |
3626 | wi::sub (wisiz, wioff)); | |
3627 | else | |
3628 | return size_zero_node; | |
3629 | } | |
3630 | } | |
3631 | else if (TREE_CODE (off) == SSA_NAME | |
24e3b821 | 3632 | && INTEGRAL_TYPE_P (TREE_TYPE (off))) |
3633 | { | |
3634 | wide_int min, max; | |
be44111e | 3635 | enum value_range_kind rng = get_range_info (off, &min, &max); |
24e3b821 | 3636 | |
3637 | if (rng == VR_RANGE) | |
3638 | { | |
3639 | if (tree size = compute_objsize (dest, ostype)) | |
3640 | { | |
3641 | wide_int wisiz = wi::to_wide (size); | |
3642 | ||
3643 | /* Ignore negative offsets for now. For others, | |
3644 | use the lower bound as the most optimistic | |
3645 | estimate of the (remaining)size. */ | |
3646 | if (wi::sign_mask (min)) | |
3647 | ; | |
3648 | else if (wi::ltu_p (min, wisiz)) | |
3649 | return wide_int_to_tree (TREE_TYPE (size), | |
3650 | wi::sub (wisiz, min)); | |
3651 | else | |
3652 | return size_zero_node; | |
3653 | } | |
3654 | } | |
3655 | } | |
3656 | } | |
3657 | else if (code != ADDR_EXPR) | |
d8aad786 | 3658 | return NULL_TREE; |
d8aad786 | 3659 | } |
3660 | ||
24e3b821 | 3661 | /* Unless computing the largest size (for memcpy and other raw memory |
3662 | functions), try to determine the size of the object from its type. */ | |
3663 | if (!ostype) | |
3664 | return NULL_TREE; | |
3665 | ||
d8aad786 | 3666 | if (TREE_CODE (dest) != ADDR_EXPR) |
3667 | return NULL_TREE; | |
3668 | ||
3669 | tree type = TREE_TYPE (dest); | |
3670 | if (TREE_CODE (type) == POINTER_TYPE) | |
3671 | type = TREE_TYPE (type); | |
3672 | ||
3673 | type = TYPE_MAIN_VARIANT (type); | |
3674 | ||
3675 | if (TREE_CODE (type) == ARRAY_TYPE | |
d4ad98ea | 3676 | && !array_at_struct_end_p (TREE_OPERAND (dest, 0))) |
d8aad786 | 3677 | { |
3678 | /* Return the constant size unless it's zero (that's a zero-length | |
3679 | array likely at the end of a struct). */ | |
3680 | tree size = TYPE_SIZE_UNIT (type); | |
3681 | if (size && TREE_CODE (size) == INTEGER_CST | |
3682 | && !integer_zerop (size)) | |
3683 | return size; | |
3684 | } | |
3685 | ||
5aef8938 | 3686 | return NULL_TREE; |
3687 | } | |
3688 | ||
3689 | /* Helper to determine and check the sizes of the source and the destination | |
8d6c6ef5 | 3690 | of calls to __builtin_{bzero,memcpy,mempcpy,memset} calls. EXP is the |
3691 | call expression, DEST is the destination argument, SRC is the source | |
3692 | argument or null, and LEN is the number of bytes. Use Object Size type-0 | |
3693 | regardless of the OPT_Wstringop_overflow_ setting. Return true on success | |
5aef8938 | 3694 | (no overflow or invalid sizes), false otherwise. */ |
3695 | ||
3696 | static bool | |
e6a18b5a | 3697 | check_memop_access (tree exp, tree dest, tree src, tree size) |
5aef8938 | 3698 | { |
5aef8938 | 3699 | /* For functions like memset and memcpy that operate on raw memory |
8d6c6ef5 | 3700 | try to determine the size of the largest source and destination |
3701 | object using type-0 Object Size regardless of the object size | |
3702 | type specified by the option. */ | |
3703 | tree srcsize = src ? compute_objsize (src, 0) : NULL_TREE; | |
3704 | tree dstsize = compute_objsize (dest, 0); | |
5aef8938 | 3705 | |
e6a18b5a | 3706 | return check_access (exp, dest, src, size, /*maxread=*/NULL_TREE, |
3707 | srcsize, dstsize); | |
8d6c6ef5 | 3708 | } |
3709 | ||
3710 | /* Validate memchr arguments without performing any expansion. | |
3711 | Return NULL_RTX. */ | |
3712 | ||
3713 | static rtx | |
3714 | expand_builtin_memchr (tree exp, rtx) | |
3715 | { | |
3716 | if (!validate_arglist (exp, | |
3717 | POINTER_TYPE, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
3718 | return NULL_RTX; | |
3719 | ||
3720 | tree arg1 = CALL_EXPR_ARG (exp, 0); | |
3721 | tree len = CALL_EXPR_ARG (exp, 2); | |
3722 | ||
3723 | /* Diagnose calls where the specified length exceeds the size | |
3724 | of the object. */ | |
3725 | if (warn_stringop_overflow) | |
3726 | { | |
3727 | tree size = compute_objsize (arg1, 0); | |
e6a18b5a | 3728 | check_access (exp, /*dst=*/NULL_TREE, /*src=*/NULL_TREE, len, |
3729 | /*maxread=*/NULL_TREE, size, /*objsize=*/NULL_TREE); | |
8d6c6ef5 | 3730 | } |
3731 | ||
3732 | return NULL_RTX; | |
5aef8938 | 3733 | } |
3734 | ||
c2f47e15 | 3735 | /* Expand a call EXP to the memcpy builtin. |
3736 | Return NULL_RTX if we failed, the caller should emit a normal call, | |
3b824fa6 | 3737 | otherwise try to get the result in TARGET, if convenient (and in |
9fe0e1b8 | 3738 | mode MODE if that's convenient). */ |
c2f47e15 | 3739 | |
53800dbe | 3740 | static rtx |
a65c4d64 | 3741 | expand_builtin_memcpy (tree exp, rtx target) |
53800dbe | 3742 | { |
c2f47e15 | 3743 | if (!validate_arglist (exp, |
3744 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
3745 | return NULL_RTX; | |
5aef8938 | 3746 | |
3747 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3748 | tree src = CALL_EXPR_ARG (exp, 1); | |
3749 | tree len = CALL_EXPR_ARG (exp, 2); | |
3750 | ||
e6a18b5a | 3751 | check_memop_access (exp, dest, src, len); |
5aef8938 | 3752 | |
d0fbba1a | 3753 | return expand_builtin_memory_copy_args (dest, src, len, target, exp, |
3754 | /*endp=*/ 0); | |
f21337ef | 3755 | } |
6840589f | 3756 | |
4d317237 | 3757 | /* Check a call EXP to the memmove built-in for validity. |
3758 | Return NULL_RTX on both success and failure. */ | |
3759 | ||
3760 | static rtx | |
3761 | expand_builtin_memmove (tree exp, rtx) | |
3762 | { | |
3763 | if (!validate_arglist (exp, | |
3764 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
3765 | return NULL_RTX; | |
3766 | ||
3767 | tree dest = CALL_EXPR_ARG (exp, 0); | |
8d6c6ef5 | 3768 | tree src = CALL_EXPR_ARG (exp, 1); |
4d317237 | 3769 | tree len = CALL_EXPR_ARG (exp, 2); |
3770 | ||
e6a18b5a | 3771 | check_memop_access (exp, dest, src, len); |
4d317237 | 3772 | |
3773 | return NULL_RTX; | |
3774 | } | |
3775 | ||
c2f47e15 | 3776 | /* Expand a call EXP to the mempcpy builtin. |
3777 | Return NULL_RTX if we failed; the caller should emit a normal call, | |
647661c6 | 3778 | otherwise try to get the result in TARGET, if convenient (and in |
9fe0e1b8 | 3779 | mode MODE if that's convenient). If ENDP is 0 return the |
3780 | destination pointer, if ENDP is 1 return the end pointer ala | |
3781 | mempcpy, and if ENDP is 2 return the end pointer minus one ala | |
3782 | stpcpy. */ | |
647661c6 | 3783 | |
3784 | static rtx | |
d0fbba1a | 3785 | expand_builtin_mempcpy (tree exp, rtx target) |
647661c6 | 3786 | { |
c2f47e15 | 3787 | if (!validate_arglist (exp, |
3788 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
3789 | return NULL_RTX; | |
5aef8938 | 3790 | |
3791 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3792 | tree src = CALL_EXPR_ARG (exp, 1); | |
3793 | tree len = CALL_EXPR_ARG (exp, 2); | |
3794 | ||
24e3b821 | 3795 | /* Policy does not generally allow using compute_objsize (which |
3796 | is used internally by check_memop_size) to change code generation | |
3797 | or drive optimization decisions. | |
3798 | ||
3799 | In this instance it is safe because the code we generate has | |
3800 | the same semantics regardless of the return value of | |
3801 | check_memop_sizes. Exactly the same amount of data is copied | |
3802 | and the return value is exactly the same in both cases. | |
3803 | ||
3804 | Furthermore, check_memop_size always uses mode 0 for the call to | |
3805 | compute_objsize, so the imprecise nature of compute_objsize is | |
3806 | avoided. */ | |
3807 | ||
5aef8938 | 3808 | /* Avoid expanding mempcpy into memcpy when the call is determined |
3809 | to overflow the buffer. This also prevents the same overflow | |
3810 | from being diagnosed again when expanding memcpy. */ | |
e6a18b5a | 3811 | if (!check_memop_access (exp, dest, src, len)) |
5aef8938 | 3812 | return NULL_RTX; |
3813 | ||
3814 | return expand_builtin_mempcpy_args (dest, src, len, | |
d0fbba1a | 3815 | target, exp, /*endp=*/ 1); |
f21337ef | 3816 | } |
3817 | ||
d0fbba1a | 3818 | /* Helper function to do the actual work for expand of memory copy family |
3819 | functions (memcpy, mempcpy, stpcpy). Expansing should assign LEN bytes | |
3820 | of memory from SRC to DEST and assign to TARGET if convenient. | |
3821 | If ENDP is 0 return the | |
3822 | destination pointer, if ENDP is 1 return the end pointer ala | |
3823 | mempcpy, and if ENDP is 2 return the end pointer minus one ala | |
3824 | stpcpy. */ | |
c2f47e15 | 3825 | |
3826 | static rtx | |
d0fbba1a | 3827 | expand_builtin_memory_copy_args (tree dest, tree src, tree len, |
3828 | rtx target, tree exp, int endp) | |
c2f47e15 | 3829 | { |
d0fbba1a | 3830 | const char *src_str; |
3831 | unsigned int src_align = get_pointer_alignment (src); | |
3832 | unsigned int dest_align = get_pointer_alignment (dest); | |
3833 | rtx dest_mem, src_mem, dest_addr, len_rtx; | |
3834 | HOST_WIDE_INT expected_size = -1; | |
3835 | unsigned int expected_align = 0; | |
3836 | unsigned HOST_WIDE_INT min_size; | |
3837 | unsigned HOST_WIDE_INT max_size; | |
3838 | unsigned HOST_WIDE_INT probable_max_size; | |
f21337ef | 3839 | |
d0fbba1a | 3840 | /* If DEST is not a pointer type, call the normal function. */ |
3841 | if (dest_align == 0) | |
3842 | return NULL_RTX; | |
a0c938f0 | 3843 | |
d0fbba1a | 3844 | /* If either SRC is not a pointer type, don't do this |
3845 | operation in-line. */ | |
3846 | if (src_align == 0) | |
3847 | return NULL_RTX; | |
9fe0e1b8 | 3848 | |
d0fbba1a | 3849 | if (currently_expanding_gimple_stmt) |
3850 | stringop_block_profile (currently_expanding_gimple_stmt, | |
3851 | &expected_align, &expected_size); | |
0862b7e9 | 3852 | |
d0fbba1a | 3853 | if (expected_align < dest_align) |
3854 | expected_align = dest_align; | |
3855 | dest_mem = get_memory_rtx (dest, len); | |
3856 | set_mem_align (dest_mem, dest_align); | |
3857 | len_rtx = expand_normal (len); | |
3858 | determine_block_size (len, len_rtx, &min_size, &max_size, | |
3859 | &probable_max_size); | |
3860 | src_str = c_getstr (src); | |
647661c6 | 3861 | |
d0fbba1a | 3862 | /* If SRC is a string constant and block move would be done |
3863 | by pieces, we can avoid loading the string from memory | |
3864 | and only stored the computed constants. */ | |
3865 | if (src_str | |
3866 | && CONST_INT_P (len_rtx) | |
3867 | && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1 | |
3868 | && can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str, | |
3869 | CONST_CAST (char *, src_str), | |
3870 | dest_align, false)) | |
3871 | { | |
3872 | dest_mem = store_by_pieces (dest_mem, INTVAL (len_rtx), | |
3873 | builtin_memcpy_read_str, | |
d72123ce | 3874 | CONST_CAST (char *, src_str), |
d0fbba1a | 3875 | dest_align, false, endp); |
3876 | dest_mem = force_operand (XEXP (dest_mem, 0), target); | |
3877 | dest_mem = convert_memory_address (ptr_mode, dest_mem); | |
3878 | return dest_mem; | |
3879 | } | |
647661c6 | 3880 | |
d0fbba1a | 3881 | src_mem = get_memory_rtx (src, len); |
3882 | set_mem_align (src_mem, src_align); | |
9fe0e1b8 | 3883 | |
d0fbba1a | 3884 | /* Copy word part most expediently. */ |
21781799 | 3885 | enum block_op_methods method = BLOCK_OP_NORMAL; |
3886 | if (CALL_EXPR_TAILCALL (exp) && (endp == 0 || target == const0_rtx)) | |
3887 | method = BLOCK_OP_TAILCALL; | |
3888 | if (endp == 1 && target != const0_rtx) | |
3889 | method = BLOCK_OP_NO_LIBCALL_RET; | |
3890 | dest_addr = emit_block_move_hints (dest_mem, src_mem, len_rtx, method, | |
d0fbba1a | 3891 | expected_align, expected_size, |
3892 | min_size, max_size, probable_max_size); | |
21781799 | 3893 | if (dest_addr == pc_rtx) |
3894 | return NULL_RTX; | |
d0fbba1a | 3895 | |
3896 | if (dest_addr == 0) | |
3897 | { | |
3898 | dest_addr = force_operand (XEXP (dest_mem, 0), target); | |
3899 | dest_addr = convert_memory_address (ptr_mode, dest_addr); | |
3900 | } | |
3901 | ||
3902 | if (endp && target != const0_rtx) | |
3903 | { | |
3904 | dest_addr = gen_rtx_PLUS (ptr_mode, dest_addr, len_rtx); | |
3905 | /* stpcpy pointer to last byte. */ | |
3906 | if (endp == 2) | |
3907 | dest_addr = gen_rtx_MINUS (ptr_mode, dest_addr, const1_rtx); | |
d72123ce | 3908 | } |
d0fbba1a | 3909 | |
3910 | return dest_addr; | |
3911 | } | |
3912 | ||
3913 | static rtx | |
3914 | expand_builtin_mempcpy_args (tree dest, tree src, tree len, | |
3915 | rtx target, tree orig_exp, int endp) | |
3916 | { | |
3917 | return expand_builtin_memory_copy_args (dest, src, len, target, orig_exp, | |
3918 | endp); | |
647661c6 | 3919 | } |
3920 | ||
c2f47e15 | 3921 | /* Expand into a movstr instruction, if one is available. Return NULL_RTX if |
727c62dd | 3922 | we failed, the caller should emit a normal call, otherwise try to |
3923 | get the result in TARGET, if convenient. If ENDP is 0 return the | |
3924 | destination pointer, if ENDP is 1 return the end pointer ala | |
3925 | mempcpy, and if ENDP is 2 return the end pointer minus one ala | |
3926 | stpcpy. */ | |
3927 | ||
3928 | static rtx | |
3929 | expand_movstr (tree dest, tree src, rtx target, int endp) | |
3930 | { | |
8786db1e | 3931 | struct expand_operand ops[3]; |
727c62dd | 3932 | rtx dest_mem; |
3933 | rtx src_mem; | |
727c62dd | 3934 | |
8d74dc42 | 3935 | if (!targetm.have_movstr ()) |
c2f47e15 | 3936 | return NULL_RTX; |
727c62dd | 3937 | |
d8ae1baa | 3938 | dest_mem = get_memory_rtx (dest, NULL); |
3939 | src_mem = get_memory_rtx (src, NULL); | |
727c62dd | 3940 | if (!endp) |
3941 | { | |
3942 | target = force_reg (Pmode, XEXP (dest_mem, 0)); | |
3943 | dest_mem = replace_equiv_address (dest_mem, target); | |
727c62dd | 3944 | } |
3945 | ||
8786db1e | 3946 | create_output_operand (&ops[0], endp ? target : NULL_RTX, Pmode); |
3947 | create_fixed_operand (&ops[1], dest_mem); | |
3948 | create_fixed_operand (&ops[2], src_mem); | |
8d74dc42 | 3949 | if (!maybe_expand_insn (targetm.code_for_movstr, 3, ops)) |
1e1d5623 | 3950 | return NULL_RTX; |
727c62dd | 3951 | |
8786db1e | 3952 | if (endp && target != const0_rtx) |
c5aba89c | 3953 | { |
8786db1e | 3954 | target = ops[0].value; |
3955 | /* movstr is supposed to set end to the address of the NUL | |
3956 | terminator. If the caller requested a mempcpy-like return value, | |
3957 | adjust it. */ | |
3958 | if (endp == 1) | |
3959 | { | |
29c05e22 | 3960 | rtx tem = plus_constant (GET_MODE (target), |
3961 | gen_lowpart (GET_MODE (target), target), 1); | |
8786db1e | 3962 | emit_move_insn (target, force_operand (tem, NULL_RTX)); |
3963 | } | |
c5aba89c | 3964 | } |
727c62dd | 3965 | return target; |
3966 | } | |
3967 | ||
5aef8938 | 3968 | /* Do some very basic size validation of a call to the strcpy builtin |
3969 | given by EXP. Return NULL_RTX to have the built-in expand to a call | |
3970 | to the library function. */ | |
3971 | ||
3972 | static rtx | |
3973 | expand_builtin_strcat (tree exp, rtx) | |
3974 | { | |
3975 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE) | |
3976 | || !warn_stringop_overflow) | |
3977 | return NULL_RTX; | |
3978 | ||
3979 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3980 | tree src = CALL_EXPR_ARG (exp, 1); | |
3981 | ||
3982 | /* There is no way here to determine the length of the string in | |
3983 | the destination to which the SRC string is being appended so | |
3984 | just diagnose cases when the souce string is longer than | |
3985 | the destination object. */ | |
3986 | ||
8d6c6ef5 | 3987 | tree destsize = compute_objsize (dest, warn_stringop_overflow - 1); |
5aef8938 | 3988 | |
e6a18b5a | 3989 | check_access (exp, dest, src, /*size=*/NULL_TREE, /*maxread=*/NULL_TREE, src, |
3990 | destsize); | |
5aef8938 | 3991 | |
3992 | return NULL_RTX; | |
3993 | } | |
3994 | ||
48e1416a | 3995 | /* Expand expression EXP, which is a call to the strcpy builtin. Return |
3996 | NULL_RTX if we failed the caller should emit a normal call, otherwise | |
c2f47e15 | 3997 | try to get the result in TARGET, if convenient (and in mode MODE if that's |
6f428e8b | 3998 | convenient). */ |
902de8ed | 3999 | |
53800dbe | 4000 | static rtx |
a65c4d64 | 4001 | expand_builtin_strcpy (tree exp, rtx target) |
53800dbe | 4002 | { |
5aef8938 | 4003 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
4004 | return NULL_RTX; | |
4005 | ||
4006 | tree dest = CALL_EXPR_ARG (exp, 0); | |
4007 | tree src = CALL_EXPR_ARG (exp, 1); | |
4008 | ||
4009 | if (warn_stringop_overflow) | |
4010 | { | |
8d6c6ef5 | 4011 | tree destsize = compute_objsize (dest, warn_stringop_overflow - 1); |
e6a18b5a | 4012 | check_access (exp, dest, src, /*size=*/NULL_TREE, /*maxread=*/NULL_TREE, |
4013 | src, destsize); | |
5aef8938 | 4014 | } |
4015 | ||
a788aa5f | 4016 | if (rtx ret = expand_builtin_strcpy_args (exp, dest, src, target)) |
0b39ade8 | 4017 | { |
4018 | /* Check to see if the argument was declared attribute nonstring | |
4019 | and if so, issue a warning since at this point it's not known | |
4020 | to be nul-terminated. */ | |
4021 | tree fndecl = get_callee_fndecl (exp); | |
4022 | maybe_warn_nonstring_arg (fndecl, exp); | |
4023 | return ret; | |
4024 | } | |
4025 | ||
4026 | return NULL_RTX; | |
c2f47e15 | 4027 | } |
4028 | ||
4029 | /* Helper function to do the actual work for expand_builtin_strcpy. The | |
4030 | arguments to the builtin_strcpy call DEST and SRC are broken out | |
4031 | so that this can also be called without constructing an actual CALL_EXPR. | |
4032 | The other arguments and return value are the same as for | |
4033 | expand_builtin_strcpy. */ | |
4034 | ||
4035 | static rtx | |
a788aa5f | 4036 | expand_builtin_strcpy_args (tree exp, tree dest, tree src, rtx target) |
c2f47e15 | 4037 | { |
a788aa5f | 4038 | /* Detect strcpy calls with unterminated arrays.. */ |
4039 | if (tree nonstr = unterminated_array (src)) | |
4040 | { | |
4041 | /* NONSTR refers to the non-nul terminated constant array. */ | |
4042 | if (!TREE_NO_WARNING (exp)) | |
4043 | warn_string_no_nul (EXPR_LOCATION (exp), "strcpy", src, nonstr); | |
4044 | return NULL_RTX; | |
4045 | } | |
4046 | ||
c2f47e15 | 4047 | return expand_movstr (dest, src, target, /*endp=*/0); |
53800dbe | 4048 | } |
4049 | ||
c2f47e15 | 4050 | /* Expand a call EXP to the stpcpy builtin. |
4051 | Return NULL_RTX if we failed the caller should emit a normal call, | |
3b824fa6 | 4052 | otherwise try to get the result in TARGET, if convenient (and in |
4053 | mode MODE if that's convenient). */ | |
4054 | ||
4055 | static rtx | |
df6e8b42 | 4056 | expand_builtin_stpcpy_1 (tree exp, rtx target, machine_mode mode) |
3b824fa6 | 4057 | { |
c2f47e15 | 4058 | tree dst, src; |
389dd41b | 4059 | location_t loc = EXPR_LOCATION (exp); |
c2f47e15 | 4060 | |
4061 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) | |
4062 | return NULL_RTX; | |
4063 | ||
4064 | dst = CALL_EXPR_ARG (exp, 0); | |
4065 | src = CALL_EXPR_ARG (exp, 1); | |
4066 | ||
4d317237 | 4067 | if (warn_stringop_overflow) |
4068 | { | |
8d6c6ef5 | 4069 | tree destsize = compute_objsize (dst, warn_stringop_overflow - 1); |
e6a18b5a | 4070 | check_access (exp, dst, src, /*size=*/NULL_TREE, /*maxread=*/NULL_TREE, |
4071 | src, destsize); | |
4d317237 | 4072 | } |
4073 | ||
727c62dd | 4074 | /* If return value is ignored, transform stpcpy into strcpy. */ |
b9a16870 | 4075 | if (target == const0_rtx && builtin_decl_implicit (BUILT_IN_STRCPY)) |
978836e5 | 4076 | { |
b9a16870 | 4077 | tree fn = builtin_decl_implicit (BUILT_IN_STRCPY); |
0568e9c1 | 4078 | tree result = build_call_nofold_loc (loc, fn, 2, dst, src); |
c8b17b2e | 4079 | return expand_expr (result, target, mode, EXPAND_NORMAL); |
978836e5 | 4080 | } |
3b824fa6 | 4081 | else |
4082 | { | |
c2f47e15 | 4083 | tree len, lenp1; |
727c62dd | 4084 | rtx ret; |
647661c6 | 4085 | |
9fe0e1b8 | 4086 | /* Ensure we get an actual string whose length can be evaluated at |
a0c938f0 | 4087 | compile-time, not an expression containing a string. This is |
4088 | because the latter will potentially produce pessimized code | |
4089 | when used to produce the return value. */ | |
2b84b289 | 4090 | c_strlen_data data; |
4091 | memset (&data, 0, sizeof (c_strlen_data)); | |
50e57712 | 4092 | if (!c_getstr (src, NULL) |
2b84b289 | 4093 | || !(len = c_strlen (src, 0, &data, 1))) |
c2f47e15 | 4094 | return expand_movstr (dst, src, target, /*endp=*/2); |
3b824fa6 | 4095 | |
2b84b289 | 4096 | if (data.decl && !TREE_NO_WARNING (exp)) |
4097 | warn_string_no_nul (EXPR_LOCATION (exp), "stpcpy", src, data.decl); | |
50e57712 | 4098 | |
389dd41b | 4099 | lenp1 = size_binop_loc (loc, PLUS_EXPR, len, ssize_int (1)); |
a65c4d64 | 4100 | ret = expand_builtin_mempcpy_args (dst, src, lenp1, |
d0fbba1a | 4101 | target, exp, /*endp=*/2); |
727c62dd | 4102 | |
4103 | if (ret) | |
4104 | return ret; | |
4105 | ||
4106 | if (TREE_CODE (len) == INTEGER_CST) | |
4107 | { | |
8ec3c5c2 | 4108 | rtx len_rtx = expand_normal (len); |
727c62dd | 4109 | |
971ba038 | 4110 | if (CONST_INT_P (len_rtx)) |
727c62dd | 4111 | { |
a788aa5f | 4112 | ret = expand_builtin_strcpy_args (exp, dst, src, target); |
727c62dd | 4113 | |
4114 | if (ret) | |
4115 | { | |
4116 | if (! target) | |
7ac87324 | 4117 | { |
4118 | if (mode != VOIDmode) | |
4119 | target = gen_reg_rtx (mode); | |
4120 | else | |
4121 | target = gen_reg_rtx (GET_MODE (ret)); | |
4122 | } | |
727c62dd | 4123 | if (GET_MODE (target) != GET_MODE (ret)) |
4124 | ret = gen_lowpart (GET_MODE (target), ret); | |
4125 | ||
29c05e22 | 4126 | ret = plus_constant (GET_MODE (ret), ret, INTVAL (len_rtx)); |
c5aba89c | 4127 | ret = emit_move_insn (target, force_operand (ret, NULL_RTX)); |
64db345d | 4128 | gcc_assert (ret); |
727c62dd | 4129 | |
4130 | return target; | |
4131 | } | |
4132 | } | |
4133 | } | |
4134 | ||
c2f47e15 | 4135 | return expand_movstr (dst, src, target, /*endp=*/2); |
3b824fa6 | 4136 | } |
4137 | } | |
4138 | ||
df6e8b42 | 4139 | /* Expand a call EXP to the stpcpy builtin and diagnose uses of nonstring |
4140 | arguments while being careful to avoid duplicate warnings (which could | |
4141 | be issued if the expander were to expand the call, resulting in it | |
4142 | being emitted in expand_call(). */ | |
4143 | ||
4144 | static rtx | |
4145 | expand_builtin_stpcpy (tree exp, rtx target, machine_mode mode) | |
4146 | { | |
4147 | if (rtx ret = expand_builtin_stpcpy_1 (exp, target, mode)) | |
4148 | { | |
4149 | /* The call has been successfully expanded. Check for nonstring | |
4150 | arguments and issue warnings as appropriate. */ | |
4151 | maybe_warn_nonstring_arg (get_callee_fndecl (exp), exp); | |
4152 | return ret; | |
4153 | } | |
4154 | ||
4155 | return NULL_RTX; | |
4156 | } | |
4157 | ||
4d317237 | 4158 | /* Check a call EXP to the stpncpy built-in for validity. |
4159 | Return NULL_RTX on both success and failure. */ | |
4160 | ||
4161 | static rtx | |
4162 | expand_builtin_stpncpy (tree exp, rtx) | |
4163 | { | |
4164 | if (!validate_arglist (exp, | |
4165 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE) | |
4166 | || !warn_stringop_overflow) | |
4167 | return NULL_RTX; | |
4168 | ||
aca1a787 | 4169 | /* The source and destination of the call. */ |
4d317237 | 4170 | tree dest = CALL_EXPR_ARG (exp, 0); |
4171 | tree src = CALL_EXPR_ARG (exp, 1); | |
4172 | ||
aca1a787 | 4173 | /* The exact number of bytes to write (not the maximum). */ |
4d317237 | 4174 | tree len = CALL_EXPR_ARG (exp, 2); |
4d317237 | 4175 | |
aca1a787 | 4176 | /* The size of the destination object. */ |
8d6c6ef5 | 4177 | tree destsize = compute_objsize (dest, warn_stringop_overflow - 1); |
4d317237 | 4178 | |
e6a18b5a | 4179 | check_access (exp, dest, src, len, /*maxread=*/NULL_TREE, src, destsize); |
4d317237 | 4180 | |
4181 | return NULL_RTX; | |
4182 | } | |
4183 | ||
6840589f | 4184 | /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE) |
4185 | bytes from constant string DATA + OFFSET and return it as target | |
4186 | constant. */ | |
4187 | ||
09879952 | 4188 | rtx |
aecda0d6 | 4189 | builtin_strncpy_read_str (void *data, HOST_WIDE_INT offset, |
f77c4496 | 4190 | scalar_int_mode mode) |
6840589f | 4191 | { |
4192 | const char *str = (const char *) data; | |
4193 | ||
4194 | if ((unsigned HOST_WIDE_INT) offset > strlen (str)) | |
4195 | return const0_rtx; | |
4196 | ||
4197 | return c_readstr (str + offset, mode); | |
4198 | } | |
4199 | ||
5aef8938 | 4200 | /* Helper to check the sizes of sequences and the destination of calls |
4201 | to __builtin_strncat and __builtin___strncat_chk. Returns true on | |
4202 | success (no overflow or invalid sizes), false otherwise. */ | |
4203 | ||
4204 | static bool | |
4205 | check_strncat_sizes (tree exp, tree objsize) | |
4206 | { | |
4207 | tree dest = CALL_EXPR_ARG (exp, 0); | |
4208 | tree src = CALL_EXPR_ARG (exp, 1); | |
e6a18b5a | 4209 | tree maxread = CALL_EXPR_ARG (exp, 2); |
5aef8938 | 4210 | |
4211 | /* Try to determine the range of lengths that the source expression | |
4212 | refers to. */ | |
4213 | tree lenrange[2]; | |
4214 | get_range_strlen (src, lenrange); | |
4215 | ||
4216 | /* Try to verify that the destination is big enough for the shortest | |
4217 | string. */ | |
4218 | ||
4219 | if (!objsize && warn_stringop_overflow) | |
4220 | { | |
4221 | /* If it hasn't been provided by __strncat_chk, try to determine | |
4222 | the size of the destination object into which the source is | |
4223 | being copied. */ | |
8d6c6ef5 | 4224 | objsize = compute_objsize (dest, warn_stringop_overflow - 1); |
5aef8938 | 4225 | } |
4226 | ||
4227 | /* Add one for the terminating nul. */ | |
4228 | tree srclen = (lenrange[0] | |
4229 | ? fold_build2 (PLUS_EXPR, size_type_node, lenrange[0], | |
4230 | size_one_node) | |
4231 | : NULL_TREE); | |
4232 | ||
e6a18b5a | 4233 | /* The strncat function copies at most MAXREAD bytes and always appends |
4234 | the terminating nul so the specified upper bound should never be equal | |
4235 | to (or greater than) the size of the destination. */ | |
4236 | if (tree_fits_uhwi_p (maxread) && tree_fits_uhwi_p (objsize) | |
4237 | && tree_int_cst_equal (objsize, maxread)) | |
5aef8938 | 4238 | { |
4d317237 | 4239 | location_t loc = tree_nonartificial_location (exp); |
4240 | loc = expansion_point_location_if_in_system_header (loc); | |
4241 | ||
4242 | warning_at (loc, OPT_Wstringop_overflow_, | |
9098b938 | 4243 | "%K%qD specified bound %E equals destination size", |
e6a18b5a | 4244 | exp, get_callee_fndecl (exp), maxread); |
5aef8938 | 4245 | |
4246 | return false; | |
4247 | } | |
4248 | ||
4249 | if (!srclen | |
e6a18b5a | 4250 | || (maxread && tree_fits_uhwi_p (maxread) |
5aef8938 | 4251 | && tree_fits_uhwi_p (srclen) |
e6a18b5a | 4252 | && tree_int_cst_lt (maxread, srclen))) |
4253 | srclen = maxread; | |
5aef8938 | 4254 | |
e6a18b5a | 4255 | /* The number of bytes to write is LEN but check_access will also |
5aef8938 | 4256 | check SRCLEN if LEN's value isn't known. */ |
e6a18b5a | 4257 | return check_access (exp, dest, src, /*size=*/NULL_TREE, maxread, srclen, |
4258 | objsize); | |
5aef8938 | 4259 | } |
4260 | ||
4261 | /* Similar to expand_builtin_strcat, do some very basic size validation | |
4262 | of a call to the strcpy builtin given by EXP. Return NULL_RTX to have | |
4263 | the built-in expand to a call to the library function. */ | |
4264 | ||
4265 | static rtx | |
4266 | expand_builtin_strncat (tree exp, rtx) | |
4267 | { | |
4268 | if (!validate_arglist (exp, | |
4269 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE) | |
4270 | || !warn_stringop_overflow) | |
4271 | return NULL_RTX; | |
4272 | ||
4273 | tree dest = CALL_EXPR_ARG (exp, 0); | |
4274 | tree src = CALL_EXPR_ARG (exp, 1); | |
4275 | /* The upper bound on the number of bytes to write. */ | |
e6a18b5a | 4276 | tree maxread = CALL_EXPR_ARG (exp, 2); |
5aef8938 | 4277 | /* The length of the source sequence. */ |
4278 | tree slen = c_strlen (src, 1); | |
4279 | ||
4280 | /* Try to determine the range of lengths that the source expression | |
4281 | refers to. */ | |
4282 | tree lenrange[2]; | |
4283 | if (slen) | |
4284 | lenrange[0] = lenrange[1] = slen; | |
4285 | else | |
4286 | get_range_strlen (src, lenrange); | |
4287 | ||
4288 | /* Try to verify that the destination is big enough for the shortest | |
4289 | string. First try to determine the size of the destination object | |
4290 | into which the source is being copied. */ | |
8d6c6ef5 | 4291 | tree destsize = compute_objsize (dest, warn_stringop_overflow - 1); |
5aef8938 | 4292 | |
4293 | /* Add one for the terminating nul. */ | |
4294 | tree srclen = (lenrange[0] | |
4295 | ? fold_build2 (PLUS_EXPR, size_type_node, lenrange[0], | |
4296 | size_one_node) | |
4297 | : NULL_TREE); | |
4298 | ||
e6a18b5a | 4299 | /* The strncat function copies at most MAXREAD bytes and always appends |
4300 | the terminating nul so the specified upper bound should never be equal | |
4301 | to (or greater than) the size of the destination. */ | |
4302 | if (tree_fits_uhwi_p (maxread) && tree_fits_uhwi_p (destsize) | |
4303 | && tree_int_cst_equal (destsize, maxread)) | |
5aef8938 | 4304 | { |
4d317237 | 4305 | location_t loc = tree_nonartificial_location (exp); |
4306 | loc = expansion_point_location_if_in_system_header (loc); | |
4307 | ||
4308 | warning_at (loc, OPT_Wstringop_overflow_, | |
9098b938 | 4309 | "%K%qD specified bound %E equals destination size", |
e6a18b5a | 4310 | exp, get_callee_fndecl (exp), maxread); |
5aef8938 | 4311 | |
4312 | return NULL_RTX; | |
4313 | } | |
4314 | ||
4315 | if (!srclen | |
e6a18b5a | 4316 | || (maxread && tree_fits_uhwi_p (maxread) |
5aef8938 | 4317 | && tree_fits_uhwi_p (srclen) |
e6a18b5a | 4318 | && tree_int_cst_lt (maxread, srclen))) |
4319 | srclen = maxread; | |
5aef8938 | 4320 | |
e6a18b5a | 4321 | /* The number of bytes to write is SRCLEN. */ |
4322 | check_access (exp, dest, src, NULL_TREE, maxread, srclen, destsize); | |
5aef8938 | 4323 | |
4324 | return NULL_RTX; | |
4325 | } | |
4326 | ||
48e1416a | 4327 | /* Expand expression EXP, which is a call to the strncpy builtin. Return |
c2f47e15 | 4328 | NULL_RTX if we failed the caller should emit a normal call. */ |
ed09096d | 4329 | |
4330 | static rtx | |
a65c4d64 | 4331 | expand_builtin_strncpy (tree exp, rtx target) |
ed09096d | 4332 | { |
389dd41b | 4333 | location_t loc = EXPR_LOCATION (exp); |
c2f47e15 | 4334 | |
4335 | if (validate_arglist (exp, | |
4336 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
ed09096d | 4337 | { |
c2f47e15 | 4338 | tree dest = CALL_EXPR_ARG (exp, 0); |
4339 | tree src = CALL_EXPR_ARG (exp, 1); | |
5aef8938 | 4340 | /* The number of bytes to write (not the maximum). */ |
c2f47e15 | 4341 | tree len = CALL_EXPR_ARG (exp, 2); |
5aef8938 | 4342 | /* The length of the source sequence. */ |
c2f47e15 | 4343 | tree slen = c_strlen (src, 1); |
6840589f | 4344 | |
e6a18b5a | 4345 | if (warn_stringop_overflow) |
4346 | { | |
4347 | tree destsize = compute_objsize (dest, | |
4348 | warn_stringop_overflow - 1); | |
4349 | ||
4350 | /* The number of bytes to write is LEN but check_access will also | |
4351 | check SLEN if LEN's value isn't known. */ | |
4352 | check_access (exp, dest, src, len, /*maxread=*/NULL_TREE, src, | |
4353 | destsize); | |
4354 | } | |
5aef8938 | 4355 | |
8ff6a5cd | 4356 | /* We must be passed a constant len and src parameter. */ |
e913b5cd | 4357 | if (!tree_fits_uhwi_p (len) || !slen || !tree_fits_uhwi_p (slen)) |
c2f47e15 | 4358 | return NULL_RTX; |
ed09096d | 4359 | |
389dd41b | 4360 | slen = size_binop_loc (loc, PLUS_EXPR, slen, ssize_int (1)); |
ed09096d | 4361 | |
4362 | /* We're required to pad with trailing zeros if the requested | |
a0c938f0 | 4363 | len is greater than strlen(s2)+1. In that case try to |
6840589f | 4364 | use store_by_pieces, if it fails, punt. */ |
ed09096d | 4365 | if (tree_int_cst_lt (slen, len)) |
6840589f | 4366 | { |
957d0361 | 4367 | unsigned int dest_align = get_pointer_alignment (dest); |
c2f47e15 | 4368 | const char *p = c_getstr (src); |
6840589f | 4369 | rtx dest_mem; |
4370 | ||
e913b5cd | 4371 | if (!p || dest_align == 0 || !tree_fits_uhwi_p (len) |
4372 | || !can_store_by_pieces (tree_to_uhwi (len), | |
6840589f | 4373 | builtin_strncpy_read_str, |
364c0c59 | 4374 | CONST_CAST (char *, p), |
4375 | dest_align, false)) | |
c2f47e15 | 4376 | return NULL_RTX; |
6840589f | 4377 | |
d8ae1baa | 4378 | dest_mem = get_memory_rtx (dest, len); |
e913b5cd | 4379 | store_by_pieces (dest_mem, tree_to_uhwi (len), |
6840589f | 4380 | builtin_strncpy_read_str, |
364c0c59 | 4381 | CONST_CAST (char *, p), dest_align, false, 0); |
a65c4d64 | 4382 | dest_mem = force_operand (XEXP (dest_mem, 0), target); |
85d654dd | 4383 | dest_mem = convert_memory_address (ptr_mode, dest_mem); |
e5716f7e | 4384 | return dest_mem; |
6840589f | 4385 | } |
ed09096d | 4386 | } |
c2f47e15 | 4387 | return NULL_RTX; |
ed09096d | 4388 | } |
4389 | ||
ecc318ff | 4390 | /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE) |
4391 | bytes from constant string DATA + OFFSET and return it as target | |
4392 | constant. */ | |
4393 | ||
f656b751 | 4394 | rtx |
aecda0d6 | 4395 | builtin_memset_read_str (void *data, HOST_WIDE_INT offset ATTRIBUTE_UNUSED, |
f77c4496 | 4396 | scalar_int_mode mode) |
ecc318ff | 4397 | { |
4398 | const char *c = (const char *) data; | |
364c0c59 | 4399 | char *p = XALLOCAVEC (char, GET_MODE_SIZE (mode)); |
ecc318ff | 4400 | |
4401 | memset (p, *c, GET_MODE_SIZE (mode)); | |
4402 | ||
4403 | return c_readstr (p, mode); | |
4404 | } | |
4405 | ||
a7ec6974 | 4406 | /* Callback routine for store_by_pieces. Return the RTL of a register |
4407 | containing GET_MODE_SIZE (MODE) consecutive copies of the unsigned | |
4408 | char value given in the RTL register data. For example, if mode is | |
4409 | 4 bytes wide, return the RTL for 0x01010101*data. */ | |
4410 | ||
4411 | static rtx | |
aecda0d6 | 4412 | builtin_memset_gen_str (void *data, HOST_WIDE_INT offset ATTRIBUTE_UNUSED, |
f77c4496 | 4413 | scalar_int_mode mode) |
a7ec6974 | 4414 | { |
4415 | rtx target, coeff; | |
4416 | size_t size; | |
4417 | char *p; | |
4418 | ||
4419 | size = GET_MODE_SIZE (mode); | |
f0ce3b1f | 4420 | if (size == 1) |
4421 | return (rtx) data; | |
a7ec6974 | 4422 | |
364c0c59 | 4423 | p = XALLOCAVEC (char, size); |
a7ec6974 | 4424 | memset (p, 1, size); |
4425 | coeff = c_readstr (p, mode); | |
4426 | ||
f0ce3b1f | 4427 | target = convert_to_mode (mode, (rtx) data, 1); |
a7ec6974 | 4428 | target = expand_mult (mode, target, coeff, NULL_RTX, 1); |
4429 | return force_reg (mode, target); | |
4430 | } | |
4431 | ||
48e1416a | 4432 | /* Expand expression EXP, which is a call to the memset builtin. Return |
4433 | NULL_RTX if we failed the caller should emit a normal call, otherwise | |
c2f47e15 | 4434 | try to get the result in TARGET, if convenient (and in mode MODE if that's |
6f428e8b | 4435 | convenient). */ |
902de8ed | 4436 | |
53800dbe | 4437 | static rtx |
3754d046 | 4438 | expand_builtin_memset (tree exp, rtx target, machine_mode mode) |
53800dbe | 4439 | { |
c2f47e15 | 4440 | if (!validate_arglist (exp, |
4441 | POINTER_TYPE, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
4442 | return NULL_RTX; | |
5aef8938 | 4443 | |
4444 | tree dest = CALL_EXPR_ARG (exp, 0); | |
4445 | tree val = CALL_EXPR_ARG (exp, 1); | |
4446 | tree len = CALL_EXPR_ARG (exp, 2); | |
4447 | ||
e6a18b5a | 4448 | check_memop_access (exp, dest, NULL_TREE, len); |
5aef8938 | 4449 | |
4450 | return expand_builtin_memset_args (dest, val, len, target, mode, exp); | |
c2f47e15 | 4451 | } |
53800dbe | 4452 | |
c2f47e15 | 4453 | /* Helper function to do the actual work for expand_builtin_memset. The |
4454 | arguments to the builtin_memset call DEST, VAL, and LEN are broken out | |
4455 | so that this can also be called without constructing an actual CALL_EXPR. | |
4456 | The other arguments and return value are the same as for | |
4457 | expand_builtin_memset. */ | |
6b961939 | 4458 | |
c2f47e15 | 4459 | static rtx |
4460 | expand_builtin_memset_args (tree dest, tree val, tree len, | |
3754d046 | 4461 | rtx target, machine_mode mode, tree orig_exp) |
c2f47e15 | 4462 | { |
4463 | tree fndecl, fn; | |
4464 | enum built_in_function fcode; | |
3754d046 | 4465 | machine_mode val_mode; |
c2f47e15 | 4466 | char c; |
4467 | unsigned int dest_align; | |
4468 | rtx dest_mem, dest_addr, len_rtx; | |
4469 | HOST_WIDE_INT expected_size = -1; | |
4470 | unsigned int expected_align = 0; | |
36d63243 | 4471 | unsigned HOST_WIDE_INT min_size; |
4472 | unsigned HOST_WIDE_INT max_size; | |
9db0f34d | 4473 | unsigned HOST_WIDE_INT probable_max_size; |
53800dbe | 4474 | |
957d0361 | 4475 | dest_align = get_pointer_alignment (dest); |
162719b3 | 4476 | |
c2f47e15 | 4477 | /* If DEST is not a pointer type, don't do this operation in-line. */ |
4478 | if (dest_align == 0) | |
4479 | return NULL_RTX; | |
6f428e8b | 4480 | |
8cee8dc0 | 4481 | if (currently_expanding_gimple_stmt) |
4482 | stringop_block_profile (currently_expanding_gimple_stmt, | |
4483 | &expected_align, &expected_size); | |
75a70cf9 | 4484 | |
c2f47e15 | 4485 | if (expected_align < dest_align) |
4486 | expected_align = dest_align; | |
6b961939 | 4487 | |
c2f47e15 | 4488 | /* If the LEN parameter is zero, return DEST. */ |
4489 | if (integer_zerop (len)) | |
4490 | { | |
4491 | /* Evaluate and ignore VAL in case it has side-effects. */ | |
4492 | expand_expr (val, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
4493 | return expand_expr (dest, target, mode, EXPAND_NORMAL); | |
4494 | } | |
7a3e5564 | 4495 | |
c2f47e15 | 4496 | /* Stabilize the arguments in case we fail. */ |
4497 | dest = builtin_save_expr (dest); | |
4498 | val = builtin_save_expr (val); | |
4499 | len = builtin_save_expr (len); | |
a7ec6974 | 4500 | |
c2f47e15 | 4501 | len_rtx = expand_normal (len); |
9db0f34d | 4502 | determine_block_size (len, len_rtx, &min_size, &max_size, |
4503 | &probable_max_size); | |
c2f47e15 | 4504 | dest_mem = get_memory_rtx (dest, len); |
03a5dda9 | 4505 | val_mode = TYPE_MODE (unsigned_char_type_node); |
a7ec6974 | 4506 | |
c2f47e15 | 4507 | if (TREE_CODE (val) != INTEGER_CST) |
4508 | { | |
4509 | rtx val_rtx; | |
a7ec6974 | 4510 | |
c2f47e15 | 4511 | val_rtx = expand_normal (val); |
03a5dda9 | 4512 | val_rtx = convert_to_mode (val_mode, val_rtx, 0); |
53800dbe | 4513 | |
c2f47e15 | 4514 | /* Assume that we can memset by pieces if we can store |
4515 | * the coefficients by pieces (in the required modes). | |
4516 | * We can't pass builtin_memset_gen_str as that emits RTL. */ | |
4517 | c = 1; | |
e913b5cd | 4518 | if (tree_fits_uhwi_p (len) |
4519 | && can_store_by_pieces (tree_to_uhwi (len), | |
4b297e2e | 4520 | builtin_memset_read_str, &c, dest_align, |
4521 | true)) | |
c2f47e15 | 4522 | { |
03a5dda9 | 4523 | val_rtx = force_reg (val_mode, val_rtx); |
e913b5cd | 4524 | store_by_pieces (dest_mem, tree_to_uhwi (len), |
4b297e2e | 4525 | builtin_memset_gen_str, val_rtx, dest_align, |
4526 | true, 0); | |
c2f47e15 | 4527 | } |
4528 | else if (!set_storage_via_setmem (dest_mem, len_rtx, val_rtx, | |
4529 | dest_align, expected_align, | |
9db0f34d | 4530 | expected_size, min_size, max_size, |
4531 | probable_max_size)) | |
6b961939 | 4532 | goto do_libcall; |
48e1416a | 4533 | |
c2f47e15 | 4534 | dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX); |
4535 | dest_mem = convert_memory_address (ptr_mode, dest_mem); | |
4536 | return dest_mem; | |
4537 | } | |
53800dbe | 4538 | |
c2f47e15 | 4539 | if (target_char_cast (val, &c)) |
4540 | goto do_libcall; | |
ecc318ff | 4541 | |
c2f47e15 | 4542 | if (c) |
4543 | { | |
e913b5cd | 4544 | if (tree_fits_uhwi_p (len) |
4545 | && can_store_by_pieces (tree_to_uhwi (len), | |
4b297e2e | 4546 | builtin_memset_read_str, &c, dest_align, |
4547 | true)) | |
e913b5cd | 4548 | store_by_pieces (dest_mem, tree_to_uhwi (len), |
4b297e2e | 4549 | builtin_memset_read_str, &c, dest_align, true, 0); |
03a5dda9 | 4550 | else if (!set_storage_via_setmem (dest_mem, len_rtx, |
4551 | gen_int_mode (c, val_mode), | |
c2f47e15 | 4552 | dest_align, expected_align, |
9db0f34d | 4553 | expected_size, min_size, max_size, |
4554 | probable_max_size)) | |
c2f47e15 | 4555 | goto do_libcall; |
48e1416a | 4556 | |
c2f47e15 | 4557 | dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX); |
4558 | dest_mem = convert_memory_address (ptr_mode, dest_mem); | |
4559 | return dest_mem; | |
4560 | } | |
ecc318ff | 4561 | |
c2f47e15 | 4562 | set_mem_align (dest_mem, dest_align); |
4563 | dest_addr = clear_storage_hints (dest_mem, len_rtx, | |
4564 | CALL_EXPR_TAILCALL (orig_exp) | |
4565 | ? BLOCK_OP_TAILCALL : BLOCK_OP_NORMAL, | |
36d63243 | 4566 | expected_align, expected_size, |
9db0f34d | 4567 | min_size, max_size, |
4568 | probable_max_size); | |
53800dbe | 4569 | |
c2f47e15 | 4570 | if (dest_addr == 0) |
4571 | { | |
4572 | dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX); | |
4573 | dest_addr = convert_memory_address (ptr_mode, dest_addr); | |
4574 | } | |
53800dbe | 4575 | |
c2f47e15 | 4576 | return dest_addr; |
6b961939 | 4577 | |
c2f47e15 | 4578 | do_libcall: |
4579 | fndecl = get_callee_fndecl (orig_exp); | |
4580 | fcode = DECL_FUNCTION_CODE (fndecl); | |
1e42d5c6 | 4581 | if (fcode == BUILT_IN_MEMSET) |
0568e9c1 | 4582 | fn = build_call_nofold_loc (EXPR_LOCATION (orig_exp), fndecl, 3, |
4583 | dest, val, len); | |
c2f47e15 | 4584 | else if (fcode == BUILT_IN_BZERO) |
0568e9c1 | 4585 | fn = build_call_nofold_loc (EXPR_LOCATION (orig_exp), fndecl, 2, |
4586 | dest, len); | |
c2f47e15 | 4587 | else |
4588 | gcc_unreachable (); | |
a65c4d64 | 4589 | gcc_assert (TREE_CODE (fn) == CALL_EXPR); |
4590 | CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (orig_exp); | |
c2f47e15 | 4591 | return expand_call (fn, target, target == const0_rtx); |
53800dbe | 4592 | } |
4593 | ||
48e1416a | 4594 | /* Expand expression EXP, which is a call to the bzero builtin. Return |
c2f47e15 | 4595 | NULL_RTX if we failed the caller should emit a normal call. */ |
27d0c333 | 4596 | |
ffc83088 | 4597 | static rtx |
0b25db21 | 4598 | expand_builtin_bzero (tree exp) |
ffc83088 | 4599 | { |
c2f47e15 | 4600 | if (!validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
7369e7ba | 4601 | return NULL_RTX; |
ffc83088 | 4602 | |
5aef8938 | 4603 | tree dest = CALL_EXPR_ARG (exp, 0); |
4604 | tree size = CALL_EXPR_ARG (exp, 1); | |
4605 | ||
e6a18b5a | 4606 | check_memop_access (exp, dest, NULL_TREE, size); |
bf8e3599 | 4607 | |
7369e7ba | 4608 | /* New argument list transforming bzero(ptr x, int y) to |
6f428e8b | 4609 | memset(ptr x, int 0, size_t y). This is done this way |
4610 | so that if it isn't expanded inline, we fallback to | |
4611 | calling bzero instead of memset. */ | |
bf8e3599 | 4612 | |
5aef8938 | 4613 | location_t loc = EXPR_LOCATION (exp); |
4614 | ||
c2f47e15 | 4615 | return expand_builtin_memset_args (dest, integer_zero_node, |
a0553bff | 4616 | fold_convert_loc (loc, |
4617 | size_type_node, size), | |
c2f47e15 | 4618 | const0_rtx, VOIDmode, exp); |
ffc83088 | 4619 | } |
4620 | ||
d6f01a40 | 4621 | /* Try to expand cmpstr operation ICODE with the given operands. |
4622 | Return the result rtx on success, otherwise return null. */ | |
4623 | ||
4624 | static rtx | |
4625 | expand_cmpstr (insn_code icode, rtx target, rtx arg1_rtx, rtx arg2_rtx, | |
4626 | HOST_WIDE_INT align) | |
4627 | { | |
4628 | machine_mode insn_mode = insn_data[icode].operand[0].mode; | |
4629 | ||
4630 | if (target && (!REG_P (target) || HARD_REGISTER_P (target))) | |
4631 | target = NULL_RTX; | |
4632 | ||
4633 | struct expand_operand ops[4]; | |
4634 | create_output_operand (&ops[0], target, insn_mode); | |
4635 | create_fixed_operand (&ops[1], arg1_rtx); | |
4636 | create_fixed_operand (&ops[2], arg2_rtx); | |
4637 | create_integer_operand (&ops[3], align); | |
4638 | if (maybe_expand_insn (icode, 4, ops)) | |
4639 | return ops[0].value; | |
4640 | return NULL_RTX; | |
4641 | } | |
4642 | ||
7a3f89b5 | 4643 | /* Expand expression EXP, which is a call to the memcmp built-in function. |
bd021c1c | 4644 | Return NULL_RTX if we failed and the caller should emit a normal call, |
3e346f54 | 4645 | otherwise try to get the result in TARGET, if convenient. |
4646 | RESULT_EQ is true if we can relax the returned value to be either zero | |
4647 | or nonzero, without caring about the sign. */ | |
27d0c333 | 4648 | |
53800dbe | 4649 | static rtx |
3e346f54 | 4650 | expand_builtin_memcmp (tree exp, rtx target, bool result_eq) |
53800dbe | 4651 | { |
c2f47e15 | 4652 | if (!validate_arglist (exp, |
4653 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
4654 | return NULL_RTX; | |
6f428e8b | 4655 | |
ea368aac | 4656 | tree arg1 = CALL_EXPR_ARG (exp, 0); |
4657 | tree arg2 = CALL_EXPR_ARG (exp, 1); | |
4658 | tree len = CALL_EXPR_ARG (exp, 2); | |
a950155e | 4659 | enum built_in_function fcode = DECL_FUNCTION_CODE (get_callee_fndecl (exp)); |
4660 | bool no_overflow = true; | |
8d6c6ef5 | 4661 | |
4662 | /* Diagnose calls where the specified length exceeds the size of either | |
4663 | object. */ | |
a950155e | 4664 | tree size = compute_objsize (arg1, 0); |
4665 | no_overflow = check_access (exp, /*dst=*/NULL_TREE, /*src=*/NULL_TREE, | |
4666 | len, /*maxread=*/NULL_TREE, size, | |
4667 | /*objsize=*/NULL_TREE); | |
b3e6ae76 | 4668 | if (no_overflow) |
a950155e | 4669 | { |
4670 | size = compute_objsize (arg2, 0); | |
4671 | no_overflow = check_access (exp, /*dst=*/NULL_TREE, /*src=*/NULL_TREE, | |
4672 | len, /*maxread=*/NULL_TREE, size, | |
4673 | /*objsize=*/NULL_TREE); | |
b3e6ae76 | 4674 | } |
a950155e | 4675 | |
ee1b788e | 4676 | /* If the specified length exceeds the size of either object, |
4677 | call the function. */ | |
4678 | if (!no_overflow) | |
4679 | return NULL_RTX; | |
4680 | ||
b3e6ae76 | 4681 | /* Due to the performance benefit, always inline the calls first |
a950155e | 4682 | when result_eq is false. */ |
4683 | rtx result = NULL_RTX; | |
b3e6ae76 | 4684 | |
ee1b788e | 4685 | if (!result_eq && fcode != BUILT_IN_BCMP) |
8d6c6ef5 | 4686 | { |
0dbefa15 | 4687 | result = inline_expand_builtin_string_cmp (exp, target); |
a950155e | 4688 | if (result) |
4689 | return result; | |
8d6c6ef5 | 4690 | } |
4691 | ||
3e346f54 | 4692 | machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); |
4693 | location_t loc = EXPR_LOCATION (exp); | |
b428c0a5 | 4694 | |
ea368aac | 4695 | unsigned int arg1_align = get_pointer_alignment (arg1) / BITS_PER_UNIT; |
4696 | unsigned int arg2_align = get_pointer_alignment (arg2) / BITS_PER_UNIT; | |
53800dbe | 4697 | |
ea368aac | 4698 | /* If we don't have POINTER_TYPE, call the function. */ |
4699 | if (arg1_align == 0 || arg2_align == 0) | |
4700 | return NULL_RTX; | |
53800dbe | 4701 | |
ea368aac | 4702 | rtx arg1_rtx = get_memory_rtx (arg1, len); |
4703 | rtx arg2_rtx = get_memory_rtx (arg2, len); | |
3e346f54 | 4704 | rtx len_rtx = expand_normal (fold_convert_loc (loc, sizetype, len)); |
53800dbe | 4705 | |
ea368aac | 4706 | /* Set MEM_SIZE as appropriate. */ |
3e346f54 | 4707 | if (CONST_INT_P (len_rtx)) |
ea368aac | 4708 | { |
3e346f54 | 4709 | set_mem_size (arg1_rtx, INTVAL (len_rtx)); |
4710 | set_mem_size (arg2_rtx, INTVAL (len_rtx)); | |
ea368aac | 4711 | } |
83f88f8e | 4712 | |
3e346f54 | 4713 | by_pieces_constfn constfn = NULL; |
4714 | ||
719f3058 | 4715 | const char *src_str = c_getstr (arg2); |
4716 | if (result_eq && src_str == NULL) | |
4717 | { | |
4718 | src_str = c_getstr (arg1); | |
4719 | if (src_str != NULL) | |
092db747 | 4720 | std::swap (arg1_rtx, arg2_rtx); |
719f3058 | 4721 | } |
3e346f54 | 4722 | |
4723 | /* If SRC is a string constant and block move would be done | |
4724 | by pieces, we can avoid loading the string from memory | |
4725 | and only stored the computed constants. */ | |
4726 | if (src_str | |
4727 | && CONST_INT_P (len_rtx) | |
4728 | && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1) | |
4729 | constfn = builtin_memcpy_read_str; | |
4730 | ||
a950155e | 4731 | result = emit_block_cmp_hints (arg1_rtx, arg2_rtx, len_rtx, |
4732 | TREE_TYPE (len), target, | |
4733 | result_eq, constfn, | |
4734 | CONST_CAST (char *, src_str)); | |
3e346f54 | 4735 | |
ea368aac | 4736 | if (result) |
4737 | { | |
4738 | /* Return the value in the proper mode for this function. */ | |
4739 | if (GET_MODE (result) == mode) | |
4740 | return result; | |
83f88f8e | 4741 | |
ea368aac | 4742 | if (target != 0) |
4743 | { | |
4744 | convert_move (target, result, 0); | |
4745 | return target; | |
4746 | } | |
0cd832f0 | 4747 | |
53800dbe | 4748 | return convert_to_mode (mode, result, 0); |
ea368aac | 4749 | } |
53800dbe | 4750 | |
61ffc71a | 4751 | return NULL_RTX; |
6f428e8b | 4752 | } |
4753 | ||
c2f47e15 | 4754 | /* Expand expression EXP, which is a call to the strcmp builtin. Return NULL_RTX |
53800dbe | 4755 | if we failed the caller should emit a normal call, otherwise try to get |
4756 | the result in TARGET, if convenient. */ | |
902de8ed | 4757 | |
53800dbe | 4758 | static rtx |
a65c4d64 | 4759 | expand_builtin_strcmp (tree exp, ATTRIBUTE_UNUSED rtx target) |
53800dbe | 4760 | { |
c2f47e15 | 4761 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
4762 | return NULL_RTX; | |
bf8e3599 | 4763 | |
a950155e | 4764 | /* Due to the performance benefit, always inline the calls first. */ |
4765 | rtx result = NULL_RTX; | |
0dbefa15 | 4766 | result = inline_expand_builtin_string_cmp (exp, target); |
a950155e | 4767 | if (result) |
4768 | return result; | |
4769 | ||
d6f01a40 | 4770 | insn_code cmpstr_icode = direct_optab_handler (cmpstr_optab, SImode); |
4771 | insn_code cmpstrn_icode = direct_optab_handler (cmpstrn_optab, SImode); | |
5c5d012b | 4772 | if (cmpstr_icode == CODE_FOR_nothing && cmpstrn_icode == CODE_FOR_nothing) |
4773 | return NULL_RTX; | |
a0c938f0 | 4774 | |
5c5d012b | 4775 | tree arg1 = CALL_EXPR_ARG (exp, 0); |
4776 | tree arg2 = CALL_EXPR_ARG (exp, 1); | |
6ac5504b | 4777 | |
5c5d012b | 4778 | unsigned int arg1_align = get_pointer_alignment (arg1) / BITS_PER_UNIT; |
4779 | unsigned int arg2_align = get_pointer_alignment (arg2) / BITS_PER_UNIT; | |
7a3f89b5 | 4780 | |
5c5d012b | 4781 | /* If we don't have POINTER_TYPE, call the function. */ |
4782 | if (arg1_align == 0 || arg2_align == 0) | |
4783 | return NULL_RTX; | |
7a3f89b5 | 4784 | |
5c5d012b | 4785 | /* Stabilize the arguments in case gen_cmpstr(n)si fail. */ |
4786 | arg1 = builtin_save_expr (arg1); | |
4787 | arg2 = builtin_save_expr (arg2); | |
53800dbe | 4788 | |
5c5d012b | 4789 | rtx arg1_rtx = get_memory_rtx (arg1, NULL); |
4790 | rtx arg2_rtx = get_memory_rtx (arg2, NULL); | |
d6f01a40 | 4791 | |
5c5d012b | 4792 | /* Try to call cmpstrsi. */ |
4793 | if (cmpstr_icode != CODE_FOR_nothing) | |
4794 | result = expand_cmpstr (cmpstr_icode, target, arg1_rtx, arg2_rtx, | |
4795 | MIN (arg1_align, arg2_align)); | |
6ac5504b | 4796 | |
5c5d012b | 4797 | /* Try to determine at least one length and call cmpstrnsi. */ |
4798 | if (!result && cmpstrn_icode != CODE_FOR_nothing) | |
4799 | { | |
4800 | tree len; | |
4801 | rtx arg3_rtx; | |
4802 | ||
4803 | tree len1 = c_strlen (arg1, 1); | |
4804 | tree len2 = c_strlen (arg2, 1); | |
4805 | ||
4806 | if (len1) | |
4807 | len1 = size_binop (PLUS_EXPR, ssize_int (1), len1); | |
4808 | if (len2) | |
4809 | len2 = size_binop (PLUS_EXPR, ssize_int (1), len2); | |
4810 | ||
4811 | /* If we don't have a constant length for the first, use the length | |
4812 | of the second, if we know it. We don't require a constant for | |
4813 | this case; some cost analysis could be done if both are available | |
4814 | but neither is constant. For now, assume they're equally cheap, | |
4815 | unless one has side effects. If both strings have constant lengths, | |
4816 | use the smaller. */ | |
4817 | ||
4818 | if (!len1) | |
4819 | len = len2; | |
4820 | else if (!len2) | |
4821 | len = len1; | |
4822 | else if (TREE_SIDE_EFFECTS (len1)) | |
4823 | len = len2; | |
4824 | else if (TREE_SIDE_EFFECTS (len2)) | |
4825 | len = len1; | |
4826 | else if (TREE_CODE (len1) != INTEGER_CST) | |
4827 | len = len2; | |
4828 | else if (TREE_CODE (len2) != INTEGER_CST) | |
4829 | len = len1; | |
4830 | else if (tree_int_cst_lt (len1, len2)) | |
4831 | len = len1; | |
4832 | else | |
4833 | len = len2; | |
3f8aefe2 | 4834 | |
5c5d012b | 4835 | /* If both arguments have side effects, we cannot optimize. */ |
4836 | if (len && !TREE_SIDE_EFFECTS (len)) | |
6ac5504b | 4837 | { |
5c5d012b | 4838 | arg3_rtx = expand_normal (len); |
4839 | result = expand_cmpstrn_or_cmpmem | |
4840 | (cmpstrn_icode, target, arg1_rtx, arg2_rtx, TREE_TYPE (len), | |
4841 | arg3_rtx, MIN (arg1_align, arg2_align)); | |
6ac5504b | 4842 | } |
5c5d012b | 4843 | } |
4844 | ||
5c5d012b | 4845 | tree fndecl = get_callee_fndecl (exp); |
5c5d012b | 4846 | if (result) |
4847 | { | |
0b39ade8 | 4848 | /* Check to see if the argument was declared attribute nonstring |
4849 | and if so, issue a warning since at this point it's not known | |
4850 | to be nul-terminated. */ | |
4851 | maybe_warn_nonstring_arg (fndecl, exp); | |
4852 | ||
5c5d012b | 4853 | /* Return the value in the proper mode for this function. */ |
4854 | machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); | |
4855 | if (GET_MODE (result) == mode) | |
4856 | return result; | |
4857 | if (target == 0) | |
4858 | return convert_to_mode (mode, result, 0); | |
4859 | convert_move (target, result, 0); | |
4860 | return target; | |
6ac5504b | 4861 | } |
5c5d012b | 4862 | |
4863 | /* Expand the library call ourselves using a stabilized argument | |
4864 | list to avoid re-evaluating the function's arguments twice. */ | |
4865 | tree fn = build_call_nofold_loc (EXPR_LOCATION (exp), fndecl, 2, arg1, arg2); | |
4866 | gcc_assert (TREE_CODE (fn) == CALL_EXPR); | |
4867 | CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp); | |
4868 | return expand_call (fn, target, target == const0_rtx); | |
83d79705 | 4869 | } |
53800dbe | 4870 | |
48e1416a | 4871 | /* Expand expression EXP, which is a call to the strncmp builtin. Return |
c2f47e15 | 4872 | NULL_RTX if we failed the caller should emit a normal call, otherwise try to get |
ed09096d | 4873 | the result in TARGET, if convenient. */ |
27d0c333 | 4874 | |
ed09096d | 4875 | static rtx |
a65c4d64 | 4876 | expand_builtin_strncmp (tree exp, ATTRIBUTE_UNUSED rtx target, |
3754d046 | 4877 | ATTRIBUTE_UNUSED machine_mode mode) |
ed09096d | 4878 | { |
c2f47e15 | 4879 | if (!validate_arglist (exp, |
4880 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
4881 | return NULL_RTX; | |
ed09096d | 4882 | |
a950155e | 4883 | /* Due to the performance benefit, always inline the calls first. */ |
4884 | rtx result = NULL_RTX; | |
0dbefa15 | 4885 | result = inline_expand_builtin_string_cmp (exp, target); |
a950155e | 4886 | if (result) |
4887 | return result; | |
4888 | ||
6e34e617 | 4889 | /* If c_strlen can determine an expression for one of the string |
6ac5504b | 4890 | lengths, and it doesn't have side effects, then emit cmpstrnsi |
7a3f89b5 | 4891 | using length MIN(strlen(string)+1, arg3). */ |
d6f01a40 | 4892 | insn_code cmpstrn_icode = direct_optab_handler (cmpstrn_optab, SImode); |
5c5d012b | 4893 | if (cmpstrn_icode == CODE_FOR_nothing) |
4894 | return NULL_RTX; | |
27d0c333 | 4895 | |
5c5d012b | 4896 | tree len; |
4897 | ||
4898 | tree arg1 = CALL_EXPR_ARG (exp, 0); | |
4899 | tree arg2 = CALL_EXPR_ARG (exp, 1); | |
4900 | tree arg3 = CALL_EXPR_ARG (exp, 2); | |
4901 | ||
4902 | unsigned int arg1_align = get_pointer_alignment (arg1) / BITS_PER_UNIT; | |
4903 | unsigned int arg2_align = get_pointer_alignment (arg2) / BITS_PER_UNIT; | |
4904 | ||
4905 | tree len1 = c_strlen (arg1, 1); | |
4906 | tree len2 = c_strlen (arg2, 1); | |
4907 | ||
4908 | location_t loc = EXPR_LOCATION (exp); | |
4909 | ||
4910 | if (len1) | |
4911 | len1 = size_binop_loc (loc, PLUS_EXPR, ssize_int (1), len1); | |
4912 | if (len2) | |
4913 | len2 = size_binop_loc (loc, PLUS_EXPR, ssize_int (1), len2); | |
4914 | ||
4915 | tree len3 = fold_convert_loc (loc, sizetype, arg3); | |
4916 | ||
4917 | /* If we don't have a constant length for the first, use the length | |
4918 | of the second, if we know it. If neither string is constant length, | |
4919 | use the given length argument. We don't require a constant for | |
4920 | this case; some cost analysis could be done if both are available | |
4921 | but neither is constant. For now, assume they're equally cheap, | |
4922 | unless one has side effects. If both strings have constant lengths, | |
4923 | use the smaller. */ | |
4924 | ||
4925 | if (!len1 && !len2) | |
4926 | len = len3; | |
4927 | else if (!len1) | |
4928 | len = len2; | |
4929 | else if (!len2) | |
4930 | len = len1; | |
4931 | else if (TREE_SIDE_EFFECTS (len1)) | |
4932 | len = len2; | |
4933 | else if (TREE_SIDE_EFFECTS (len2)) | |
4934 | len = len1; | |
4935 | else if (TREE_CODE (len1) != INTEGER_CST) | |
4936 | len = len2; | |
4937 | else if (TREE_CODE (len2) != INTEGER_CST) | |
4938 | len = len1; | |
4939 | else if (tree_int_cst_lt (len1, len2)) | |
4940 | len = len1; | |
4941 | else | |
4942 | len = len2; | |
4943 | ||
4944 | /* If we are not using the given length, we must incorporate it here. | |
4945 | The actual new length parameter will be MIN(len,arg3) in this case. */ | |
4946 | if (len != len3) | |
a55f0871 | 4947 | { |
4948 | len = fold_convert_loc (loc, sizetype, len); | |
4949 | len = fold_build2_loc (loc, MIN_EXPR, TREE_TYPE (len), len, len3); | |
4950 | } | |
5c5d012b | 4951 | rtx arg1_rtx = get_memory_rtx (arg1, len); |
4952 | rtx arg2_rtx = get_memory_rtx (arg2, len); | |
4953 | rtx arg3_rtx = expand_normal (len); | |
a950155e | 4954 | result = expand_cmpstrn_or_cmpmem (cmpstrn_icode, target, arg1_rtx, |
4955 | arg2_rtx, TREE_TYPE (len), arg3_rtx, | |
4956 | MIN (arg1_align, arg2_align)); | |
5c5d012b | 4957 | |
5c5d012b | 4958 | tree fndecl = get_callee_fndecl (exp); |
5c5d012b | 4959 | if (result) |
4960 | { | |
0b39ade8 | 4961 | /* Check to see if the argument was declared attribute nonstring |
4962 | and if so, issue a warning since at this point it's not known | |
4963 | to be nul-terminated. */ | |
4964 | maybe_warn_nonstring_arg (fndecl, exp); | |
4965 | ||
5c5d012b | 4966 | /* Return the value in the proper mode for this function. */ |
4967 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
4968 | if (GET_MODE (result) == mode) | |
4969 | return result; | |
4970 | if (target == 0) | |
4971 | return convert_to_mode (mode, result, 0); | |
4972 | convert_move (target, result, 0); | |
4973 | return target; | |
4974 | } | |
4975 | ||
4976 | /* Expand the library call ourselves using a stabilized argument | |
4977 | list to avoid re-evaluating the function's arguments twice. */ | |
4978 | tree fn = build_call_nofold_loc (loc, fndecl, 3, arg1, arg2, len); | |
4979 | gcc_assert (TREE_CODE (fn) == CALL_EXPR); | |
4980 | CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp); | |
4981 | return expand_call (fn, target, target == const0_rtx); | |
49f0327b | 4982 | } |
4983 | ||
a66c9326 | 4984 | /* Expand a call to __builtin_saveregs, generating the result in TARGET, |
4985 | if that's convenient. */ | |
902de8ed | 4986 | |
a66c9326 | 4987 | rtx |
aecda0d6 | 4988 | expand_builtin_saveregs (void) |
53800dbe | 4989 | { |
1e0c0b35 | 4990 | rtx val; |
4991 | rtx_insn *seq; | |
53800dbe | 4992 | |
4993 | /* Don't do __builtin_saveregs more than once in a function. | |
4994 | Save the result of the first call and reuse it. */ | |
4995 | if (saveregs_value != 0) | |
4996 | return saveregs_value; | |
53800dbe | 4997 | |
a66c9326 | 4998 | /* When this function is called, it means that registers must be |
4999 | saved on entry to this function. So we migrate the call to the | |
5000 | first insn of this function. */ | |
5001 | ||
5002 | start_sequence (); | |
53800dbe | 5003 | |
a66c9326 | 5004 | /* Do whatever the machine needs done in this case. */ |
45550790 | 5005 | val = targetm.calls.expand_builtin_saveregs (); |
53800dbe | 5006 | |
a66c9326 | 5007 | seq = get_insns (); |
5008 | end_sequence (); | |
53800dbe | 5009 | |
a66c9326 | 5010 | saveregs_value = val; |
53800dbe | 5011 | |
31d3e01c | 5012 | /* Put the insns after the NOTE that starts the function. If this |
5013 | is inside a start_sequence, make the outer-level insn chain current, so | |
a66c9326 | 5014 | the code is placed at the start of the function. */ |
5015 | push_topmost_sequence (); | |
0ec80471 | 5016 | emit_insn_after (seq, entry_of_function ()); |
a66c9326 | 5017 | pop_topmost_sequence (); |
5018 | ||
5019 | return val; | |
53800dbe | 5020 | } |
5021 | ||
79012a9d | 5022 | /* Expand a call to __builtin_next_arg. */ |
27d0c333 | 5023 | |
53800dbe | 5024 | static rtx |
79012a9d | 5025 | expand_builtin_next_arg (void) |
53800dbe | 5026 | { |
79012a9d | 5027 | /* Checking arguments is already done in fold_builtin_next_arg |
5028 | that must be called before this function. */ | |
940ddc5c | 5029 | return expand_binop (ptr_mode, add_optab, |
abe32cce | 5030 | crtl->args.internal_arg_pointer, |
5031 | crtl->args.arg_offset_rtx, | |
53800dbe | 5032 | NULL_RTX, 0, OPTAB_LIB_WIDEN); |
5033 | } | |
5034 | ||
a66c9326 | 5035 | /* Make it easier for the backends by protecting the valist argument |
5036 | from multiple evaluations. */ | |
5037 | ||
5038 | static tree | |
389dd41b | 5039 | stabilize_va_list_loc (location_t loc, tree valist, int needs_lvalue) |
a66c9326 | 5040 | { |
5f57a8b1 | 5041 | tree vatype = targetm.canonical_va_list_type (TREE_TYPE (valist)); |
5042 | ||
182cf5a9 | 5043 | /* The current way of determining the type of valist is completely |
5044 | bogus. We should have the information on the va builtin instead. */ | |
5045 | if (!vatype) | |
5046 | vatype = targetm.fn_abi_va_list (cfun->decl); | |
5f57a8b1 | 5047 | |
5048 | if (TREE_CODE (vatype) == ARRAY_TYPE) | |
a66c9326 | 5049 | { |
2d47cc32 | 5050 | if (TREE_SIDE_EFFECTS (valist)) |
5051 | valist = save_expr (valist); | |
11a61dea | 5052 | |
2d47cc32 | 5053 | /* For this case, the backends will be expecting a pointer to |
5f57a8b1 | 5054 | vatype, but it's possible we've actually been given an array |
5055 | (an actual TARGET_CANONICAL_VA_LIST_TYPE (valist)). | |
2d47cc32 | 5056 | So fix it. */ |
5057 | if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE) | |
8a15c04a | 5058 | { |
5f57a8b1 | 5059 | tree p1 = build_pointer_type (TREE_TYPE (vatype)); |
389dd41b | 5060 | valist = build_fold_addr_expr_with_type_loc (loc, valist, p1); |
8a15c04a | 5061 | } |
a66c9326 | 5062 | } |
11a61dea | 5063 | else |
a66c9326 | 5064 | { |
182cf5a9 | 5065 | tree pt = build_pointer_type (vatype); |
11a61dea | 5066 | |
2d47cc32 | 5067 | if (! needs_lvalue) |
5068 | { | |
11a61dea | 5069 | if (! TREE_SIDE_EFFECTS (valist)) |
5070 | return valist; | |
bf8e3599 | 5071 | |
389dd41b | 5072 | valist = fold_build1_loc (loc, ADDR_EXPR, pt, valist); |
a66c9326 | 5073 | TREE_SIDE_EFFECTS (valist) = 1; |
a66c9326 | 5074 | } |
2d47cc32 | 5075 | |
11a61dea | 5076 | if (TREE_SIDE_EFFECTS (valist)) |
2d47cc32 | 5077 | valist = save_expr (valist); |
182cf5a9 | 5078 | valist = fold_build2_loc (loc, MEM_REF, |
5079 | vatype, valist, build_int_cst (pt, 0)); | |
a66c9326 | 5080 | } |
5081 | ||
5082 | return valist; | |
5083 | } | |
5084 | ||
2e15d750 | 5085 | /* The "standard" definition of va_list is void*. */ |
5086 | ||
5087 | tree | |
5088 | std_build_builtin_va_list (void) | |
5089 | { | |
5090 | return ptr_type_node; | |
5091 | } | |
5092 | ||
5f57a8b1 | 5093 | /* The "standard" abi va_list is va_list_type_node. */ |
5094 | ||
5095 | tree | |
5096 | std_fn_abi_va_list (tree fndecl ATTRIBUTE_UNUSED) | |
5097 | { | |
5098 | return va_list_type_node; | |
5099 | } | |
5100 | ||
5101 | /* The "standard" type of va_list is va_list_type_node. */ | |
5102 | ||
5103 | tree | |
5104 | std_canonical_va_list_type (tree type) | |
5105 | { | |
5106 | tree wtype, htype; | |
5107 | ||
5f57a8b1 | 5108 | wtype = va_list_type_node; |
5109 | htype = type; | |
b6da2e41 | 5110 | |
5111 | if (TREE_CODE (wtype) == ARRAY_TYPE) | |
5f57a8b1 | 5112 | { |
5113 | /* If va_list is an array type, the argument may have decayed | |
5114 | to a pointer type, e.g. by being passed to another function. | |
5115 | In that case, unwrap both types so that we can compare the | |
5116 | underlying records. */ | |
5117 | if (TREE_CODE (htype) == ARRAY_TYPE | |
5118 | || POINTER_TYPE_P (htype)) | |
5119 | { | |
5120 | wtype = TREE_TYPE (wtype); | |
5121 | htype = TREE_TYPE (htype); | |
5122 | } | |
5123 | } | |
5124 | if (TYPE_MAIN_VARIANT (wtype) == TYPE_MAIN_VARIANT (htype)) | |
5125 | return va_list_type_node; | |
5126 | ||
5127 | return NULL_TREE; | |
5128 | } | |
5129 | ||
a66c9326 | 5130 | /* The "standard" implementation of va_start: just assign `nextarg' to |
5131 | the variable. */ | |
27d0c333 | 5132 | |
a66c9326 | 5133 | void |
aecda0d6 | 5134 | std_expand_builtin_va_start (tree valist, rtx nextarg) |
a66c9326 | 5135 | { |
f03c17bc | 5136 | rtx va_r = expand_expr (valist, NULL_RTX, VOIDmode, EXPAND_WRITE); |
5137 | convert_move (va_r, nextarg, 0); | |
a66c9326 | 5138 | } |
5139 | ||
c2f47e15 | 5140 | /* Expand EXP, a call to __builtin_va_start. */ |
27d0c333 | 5141 | |
a66c9326 | 5142 | static rtx |
c2f47e15 | 5143 | expand_builtin_va_start (tree exp) |
a66c9326 | 5144 | { |
5145 | rtx nextarg; | |
c2f47e15 | 5146 | tree valist; |
389dd41b | 5147 | location_t loc = EXPR_LOCATION (exp); |
a66c9326 | 5148 | |
c2f47e15 | 5149 | if (call_expr_nargs (exp) < 2) |
cb166087 | 5150 | { |
389dd41b | 5151 | error_at (loc, "too few arguments to function %<va_start%>"); |
cb166087 | 5152 | return const0_rtx; |
5153 | } | |
a66c9326 | 5154 | |
c2f47e15 | 5155 | if (fold_builtin_next_arg (exp, true)) |
79012a9d | 5156 | return const0_rtx; |
7c2f0500 | 5157 | |
79012a9d | 5158 | nextarg = expand_builtin_next_arg (); |
389dd41b | 5159 | valist = stabilize_va_list_loc (loc, CALL_EXPR_ARG (exp, 0), 1); |
a66c9326 | 5160 | |
8a58ed0a | 5161 | if (targetm.expand_builtin_va_start) |
5162 | targetm.expand_builtin_va_start (valist, nextarg); | |
5163 | else | |
5164 | std_expand_builtin_va_start (valist, nextarg); | |
a66c9326 | 5165 | |
5166 | return const0_rtx; | |
5167 | } | |
5168 | ||
c2f47e15 | 5169 | /* Expand EXP, a call to __builtin_va_end. */ |
f7c44134 | 5170 | |
a66c9326 | 5171 | static rtx |
c2f47e15 | 5172 | expand_builtin_va_end (tree exp) |
a66c9326 | 5173 | { |
c2f47e15 | 5174 | tree valist = CALL_EXPR_ARG (exp, 0); |
8a15c04a | 5175 | |
8a15c04a | 5176 | /* Evaluate for side effects, if needed. I hate macros that don't |
5177 | do that. */ | |
5178 | if (TREE_SIDE_EFFECTS (valist)) | |
5179 | expand_expr (valist, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
a66c9326 | 5180 | |
5181 | return const0_rtx; | |
5182 | } | |
5183 | ||
c2f47e15 | 5184 | /* Expand EXP, a call to __builtin_va_copy. We do this as a |
a66c9326 | 5185 | builtin rather than just as an assignment in stdarg.h because of the |
5186 | nastiness of array-type va_list types. */ | |
f7c44134 | 5187 | |
a66c9326 | 5188 | static rtx |
c2f47e15 | 5189 | expand_builtin_va_copy (tree exp) |
a66c9326 | 5190 | { |
5191 | tree dst, src, t; | |
389dd41b | 5192 | location_t loc = EXPR_LOCATION (exp); |
a66c9326 | 5193 | |
c2f47e15 | 5194 | dst = CALL_EXPR_ARG (exp, 0); |
5195 | src = CALL_EXPR_ARG (exp, 1); | |
a66c9326 | 5196 | |
389dd41b | 5197 | dst = stabilize_va_list_loc (loc, dst, 1); |
5198 | src = stabilize_va_list_loc (loc, src, 0); | |
a66c9326 | 5199 | |
5f57a8b1 | 5200 | gcc_assert (cfun != NULL && cfun->decl != NULL_TREE); |
5201 | ||
5202 | if (TREE_CODE (targetm.fn_abi_va_list (cfun->decl)) != ARRAY_TYPE) | |
a66c9326 | 5203 | { |
5f57a8b1 | 5204 | t = build2 (MODIFY_EXPR, targetm.fn_abi_va_list (cfun->decl), dst, src); |
a66c9326 | 5205 | TREE_SIDE_EFFECTS (t) = 1; |
5206 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
5207 | } | |
5208 | else | |
5209 | { | |
11a61dea | 5210 | rtx dstb, srcb, size; |
5211 | ||
5212 | /* Evaluate to pointers. */ | |
5213 | dstb = expand_expr (dst, NULL_RTX, Pmode, EXPAND_NORMAL); | |
5214 | srcb = expand_expr (src, NULL_RTX, Pmode, EXPAND_NORMAL); | |
5f57a8b1 | 5215 | size = expand_expr (TYPE_SIZE_UNIT (targetm.fn_abi_va_list (cfun->decl)), |
5216 | NULL_RTX, VOIDmode, EXPAND_NORMAL); | |
11a61dea | 5217 | |
85d654dd | 5218 | dstb = convert_memory_address (Pmode, dstb); |
5219 | srcb = convert_memory_address (Pmode, srcb); | |
726ec87c | 5220 | |
11a61dea | 5221 | /* "Dereference" to BLKmode memories. */ |
5222 | dstb = gen_rtx_MEM (BLKmode, dstb); | |
ab6ab77e | 5223 | set_mem_alias_set (dstb, get_alias_set (TREE_TYPE (TREE_TYPE (dst)))); |
5f57a8b1 | 5224 | set_mem_align (dstb, TYPE_ALIGN (targetm.fn_abi_va_list (cfun->decl))); |
11a61dea | 5225 | srcb = gen_rtx_MEM (BLKmode, srcb); |
ab6ab77e | 5226 | set_mem_alias_set (srcb, get_alias_set (TREE_TYPE (TREE_TYPE (src)))); |
5f57a8b1 | 5227 | set_mem_align (srcb, TYPE_ALIGN (targetm.fn_abi_va_list (cfun->decl))); |
11a61dea | 5228 | |
5229 | /* Copy. */ | |
0378dbdc | 5230 | emit_block_move (dstb, srcb, size, BLOCK_OP_NORMAL); |
a66c9326 | 5231 | } |
5232 | ||
5233 | return const0_rtx; | |
5234 | } | |
5235 | ||
53800dbe | 5236 | /* Expand a call to one of the builtin functions __builtin_frame_address or |
5237 | __builtin_return_address. */ | |
27d0c333 | 5238 | |
53800dbe | 5239 | static rtx |
c2f47e15 | 5240 | expand_builtin_frame_address (tree fndecl, tree exp) |
53800dbe | 5241 | { |
53800dbe | 5242 | /* The argument must be a nonnegative integer constant. |
5243 | It counts the number of frames to scan up the stack. | |
5b252e95 | 5244 | The value is either the frame pointer value or the return |
5245 | address saved in that frame. */ | |
c2f47e15 | 5246 | if (call_expr_nargs (exp) == 0) |
53800dbe | 5247 | /* Warning about missing arg was already issued. */ |
5248 | return const0_rtx; | |
e913b5cd | 5249 | else if (! tree_fits_uhwi_p (CALL_EXPR_ARG (exp, 0))) |
53800dbe | 5250 | { |
5b252e95 | 5251 | error ("invalid argument to %qD", fndecl); |
53800dbe | 5252 | return const0_rtx; |
5253 | } | |
5254 | else | |
5255 | { | |
5b252e95 | 5256 | /* Number of frames to scan up the stack. */ |
5257 | unsigned HOST_WIDE_INT count = tree_to_uhwi (CALL_EXPR_ARG (exp, 0)); | |
5258 | ||
5259 | rtx tem = expand_builtin_return_addr (DECL_FUNCTION_CODE (fndecl), count); | |
53800dbe | 5260 | |
5261 | /* Some ports cannot access arbitrary stack frames. */ | |
5262 | if (tem == NULL) | |
5263 | { | |
5b252e95 | 5264 | warning (0, "unsupported argument to %qD", fndecl); |
53800dbe | 5265 | return const0_rtx; |
5266 | } | |
5267 | ||
5b252e95 | 5268 | if (count) |
5269 | { | |
5270 | /* Warn since no effort is made to ensure that any frame | |
5271 | beyond the current one exists or can be safely reached. */ | |
5272 | warning (OPT_Wframe_address, "calling %qD with " | |
5273 | "a nonzero argument is unsafe", fndecl); | |
5274 | } | |
5275 | ||
53800dbe | 5276 | /* For __builtin_frame_address, return what we've got. */ |
5277 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
5278 | return tem; | |
5279 | ||
8ad4c111 | 5280 | if (!REG_P (tem) |
53800dbe | 5281 | && ! CONSTANT_P (tem)) |
99182918 | 5282 | tem = copy_addr_to_reg (tem); |
53800dbe | 5283 | return tem; |
5284 | } | |
5285 | } | |
5286 | ||
990495a7 | 5287 | /* Expand EXP, a call to the alloca builtin. Return NULL_RTX if we |
2b29cc6a | 5288 | failed and the caller should emit a normal call. */ |
15c6cf6b | 5289 | |
53800dbe | 5290 | static rtx |
2b29cc6a | 5291 | expand_builtin_alloca (tree exp) |
53800dbe | 5292 | { |
5293 | rtx op0; | |
15c6cf6b | 5294 | rtx result; |
581bf1c2 | 5295 | unsigned int align; |
370e45b9 | 5296 | tree fndecl = get_callee_fndecl (exp); |
2b34677f | 5297 | HOST_WIDE_INT max_size; |
5298 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
2b29cc6a | 5299 | bool alloca_for_var = CALL_ALLOCA_FOR_VAR_P (exp); |
370e45b9 | 5300 | bool valid_arglist |
2b34677f | 5301 | = (fcode == BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX |
5302 | ? validate_arglist (exp, INTEGER_TYPE, INTEGER_TYPE, INTEGER_TYPE, | |
5303 | VOID_TYPE) | |
5304 | : fcode == BUILT_IN_ALLOCA_WITH_ALIGN | |
5305 | ? validate_arglist (exp, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE) | |
5306 | : validate_arglist (exp, INTEGER_TYPE, VOID_TYPE)); | |
581bf1c2 | 5307 | |
5308 | if (!valid_arglist) | |
c2f47e15 | 5309 | return NULL_RTX; |
53800dbe | 5310 | |
8e18705e | 5311 | if ((alloca_for_var |
5312 | && warn_vla_limit >= HOST_WIDE_INT_MAX | |
5313 | && warn_alloc_size_limit < warn_vla_limit) | |
5314 | || (!alloca_for_var | |
5315 | && warn_alloca_limit >= HOST_WIDE_INT_MAX | |
5316 | && warn_alloc_size_limit < warn_alloca_limit | |
5317 | )) | |
370e45b9 | 5318 | { |
8e18705e | 5319 | /* -Walloca-larger-than and -Wvla-larger-than settings of |
5320 | less than HOST_WIDE_INT_MAX override the more general | |
5321 | -Walloc-size-larger-than so unless either of the former | |
5322 | options is smaller than the last one (wchich would imply | |
5323 | that the call was already checked), check the alloca | |
5324 | arguments for overflow. */ | |
370e45b9 | 5325 | tree args[] = { CALL_EXPR_ARG (exp, 0), NULL_TREE }; |
5326 | int idx[] = { 0, -1 }; | |
5327 | maybe_warn_alloc_args_overflow (fndecl, exp, args, idx); | |
5328 | } | |
5329 | ||
53800dbe | 5330 | /* Compute the argument. */ |
c2f47e15 | 5331 | op0 = expand_normal (CALL_EXPR_ARG (exp, 0)); |
53800dbe | 5332 | |
581bf1c2 | 5333 | /* Compute the alignment. */ |
2b34677f | 5334 | align = (fcode == BUILT_IN_ALLOCA |
5335 | ? BIGGEST_ALIGNMENT | |
5336 | : TREE_INT_CST_LOW (CALL_EXPR_ARG (exp, 1))); | |
5337 | ||
5338 | /* Compute the maximum size. */ | |
5339 | max_size = (fcode == BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX | |
5340 | ? TREE_INT_CST_LOW (CALL_EXPR_ARG (exp, 2)) | |
5341 | : -1); | |
581bf1c2 | 5342 | |
2b29cc6a | 5343 | /* Allocate the desired space. If the allocation stems from the declaration |
5344 | of a variable-sized object, it cannot accumulate. */ | |
2b34677f | 5345 | result |
5346 | = allocate_dynamic_stack_space (op0, 0, align, max_size, alloca_for_var); | |
85d654dd | 5347 | result = convert_memory_address (ptr_mode, result); |
15c6cf6b | 5348 | |
5349 | return result; | |
53800dbe | 5350 | } |
5351 | ||
829e6a9b | 5352 | /* Emit a call to __asan_allocas_unpoison call in EXP. Add to second argument |
5353 | of the call virtual_stack_dynamic_rtx - stack_pointer_rtx, which is the | |
5354 | STACK_DYNAMIC_OFFSET value. See motivation for this in comment to | |
5355 | handle_builtin_stack_restore function. */ | |
d08919a7 | 5356 | |
5357 | static rtx | |
5358 | expand_asan_emit_allocas_unpoison (tree exp) | |
5359 | { | |
5360 | tree arg0 = CALL_EXPR_ARG (exp, 0); | |
829e6a9b | 5361 | tree arg1 = CALL_EXPR_ARG (exp, 1); |
cd2ee6ee | 5362 | rtx top = expand_expr (arg0, NULL_RTX, ptr_mode, EXPAND_NORMAL); |
829e6a9b | 5363 | rtx bot = expand_expr (arg1, NULL_RTX, ptr_mode, EXPAND_NORMAL); |
5364 | rtx off = expand_simple_binop (Pmode, MINUS, virtual_stack_dynamic_rtx, | |
5365 | stack_pointer_rtx, NULL_RTX, 0, | |
5366 | OPTAB_LIB_WIDEN); | |
5367 | off = convert_modes (ptr_mode, Pmode, off, 0); | |
5368 | bot = expand_simple_binop (ptr_mode, PLUS, bot, off, NULL_RTX, 0, | |
5369 | OPTAB_LIB_WIDEN); | |
d08919a7 | 5370 | rtx ret = init_one_libfunc ("__asan_allocas_unpoison"); |
9e9e5c15 | 5371 | ret = emit_library_call_value (ret, NULL_RTX, LCT_NORMAL, ptr_mode, |
5372 | top, ptr_mode, bot, ptr_mode); | |
d08919a7 | 5373 | return ret; |
5374 | } | |
5375 | ||
74bdbe96 | 5376 | /* Expand a call to bswap builtin in EXP. |
5377 | Return NULL_RTX if a normal call should be emitted rather than expanding the | |
5378 | function in-line. If convenient, the result should be placed in TARGET. | |
5379 | SUBTARGET may be used as the target for computing one of EXP's operands. */ | |
42791117 | 5380 | |
5381 | static rtx | |
3754d046 | 5382 | expand_builtin_bswap (machine_mode target_mode, tree exp, rtx target, |
74bdbe96 | 5383 | rtx subtarget) |
42791117 | 5384 | { |
42791117 | 5385 | tree arg; |
5386 | rtx op0; | |
5387 | ||
c2f47e15 | 5388 | if (!validate_arglist (exp, INTEGER_TYPE, VOID_TYPE)) |
5389 | return NULL_RTX; | |
42791117 | 5390 | |
c2f47e15 | 5391 | arg = CALL_EXPR_ARG (exp, 0); |
74bdbe96 | 5392 | op0 = expand_expr (arg, |
5393 | subtarget && GET_MODE (subtarget) == target_mode | |
5394 | ? subtarget : NULL_RTX, | |
5395 | target_mode, EXPAND_NORMAL); | |
5396 | if (GET_MODE (op0) != target_mode) | |
5397 | op0 = convert_to_mode (target_mode, op0, 1); | |
42791117 | 5398 | |
74bdbe96 | 5399 | target = expand_unop (target_mode, bswap_optab, op0, target, 1); |
42791117 | 5400 | |
5401 | gcc_assert (target); | |
5402 | ||
74bdbe96 | 5403 | return convert_to_mode (target_mode, target, 1); |
42791117 | 5404 | } |
5405 | ||
c2f47e15 | 5406 | /* Expand a call to a unary builtin in EXP. |
5407 | Return NULL_RTX if a normal call should be emitted rather than expanding the | |
53800dbe | 5408 | function in-line. If convenient, the result should be placed in TARGET. |
5409 | SUBTARGET may be used as the target for computing one of EXP's operands. */ | |
15c6cf6b | 5410 | |
53800dbe | 5411 | static rtx |
3754d046 | 5412 | expand_builtin_unop (machine_mode target_mode, tree exp, rtx target, |
aecda0d6 | 5413 | rtx subtarget, optab op_optab) |
53800dbe | 5414 | { |
5415 | rtx op0; | |
c2f47e15 | 5416 | |
5417 | if (!validate_arglist (exp, INTEGER_TYPE, VOID_TYPE)) | |
5418 | return NULL_RTX; | |
53800dbe | 5419 | |
5420 | /* Compute the argument. */ | |
f97eea22 | 5421 | op0 = expand_expr (CALL_EXPR_ARG (exp, 0), |
5422 | (subtarget | |
5423 | && (TYPE_MODE (TREE_TYPE (CALL_EXPR_ARG (exp, 0))) | |
5424 | == GET_MODE (subtarget))) ? subtarget : NULL_RTX, | |
1db6d067 | 5425 | VOIDmode, EXPAND_NORMAL); |
6a08d0ab | 5426 | /* Compute op, into TARGET if possible. |
53800dbe | 5427 | Set TARGET to wherever the result comes back. */ |
c2f47e15 | 5428 | target = expand_unop (TYPE_MODE (TREE_TYPE (CALL_EXPR_ARG (exp, 0))), |
6aaa1f9e | 5429 | op_optab, op0, target, op_optab != clrsb_optab); |
64db345d | 5430 | gcc_assert (target); |
7d3f6cc7 | 5431 | |
efb070c8 | 5432 | return convert_to_mode (target_mode, target, 0); |
53800dbe | 5433 | } |
89cfe6e5 | 5434 | |
48e1416a | 5435 | /* Expand a call to __builtin_expect. We just return our argument |
5a74f77e | 5436 | as the builtin_expect semantic should've been already executed by |
5437 | tree branch prediction pass. */ | |
89cfe6e5 | 5438 | |
5439 | static rtx | |
c2f47e15 | 5440 | expand_builtin_expect (tree exp, rtx target) |
89cfe6e5 | 5441 | { |
1e4adcfc | 5442 | tree arg; |
89cfe6e5 | 5443 | |
c2f47e15 | 5444 | if (call_expr_nargs (exp) < 2) |
89cfe6e5 | 5445 | return const0_rtx; |
c2f47e15 | 5446 | arg = CALL_EXPR_ARG (exp, 0); |
89cfe6e5 | 5447 | |
c2f47e15 | 5448 | target = expand_expr (arg, target, VOIDmode, EXPAND_NORMAL); |
5a74f77e | 5449 | /* When guessing was done, the hints should be already stripped away. */ |
07311427 | 5450 | gcc_assert (!flag_guess_branch_prob |
852f689e | 5451 | || optimize == 0 || seen_error ()); |
89cfe6e5 | 5452 | return target; |
5453 | } | |
689df48e | 5454 | |
01107f42 | 5455 | /* Expand a call to __builtin_expect_with_probability. We just return our |
5456 | argument as the builtin_expect semantic should've been already executed by | |
5457 | tree branch prediction pass. */ | |
5458 | ||
5459 | static rtx | |
5460 | expand_builtin_expect_with_probability (tree exp, rtx target) | |
5461 | { | |
5462 | tree arg; | |
5463 | ||
5464 | if (call_expr_nargs (exp) < 3) | |
5465 | return const0_rtx; | |
5466 | arg = CALL_EXPR_ARG (exp, 0); | |
5467 | ||
5468 | target = expand_expr (arg, target, VOIDmode, EXPAND_NORMAL); | |
5469 | /* When guessing was done, the hints should be already stripped away. */ | |
5470 | gcc_assert (!flag_guess_branch_prob | |
5471 | || optimize == 0 || seen_error ()); | |
5472 | return target; | |
5473 | } | |
5474 | ||
5475 | ||
fca0886c | 5476 | /* Expand a call to __builtin_assume_aligned. We just return our first |
5477 | argument as the builtin_assume_aligned semantic should've been already | |
5478 | executed by CCP. */ | |
5479 | ||
5480 | static rtx | |
5481 | expand_builtin_assume_aligned (tree exp, rtx target) | |
5482 | { | |
5483 | if (call_expr_nargs (exp) < 2) | |
5484 | return const0_rtx; | |
5485 | target = expand_expr (CALL_EXPR_ARG (exp, 0), target, VOIDmode, | |
5486 | EXPAND_NORMAL); | |
5487 | gcc_assert (!TREE_SIDE_EFFECTS (CALL_EXPR_ARG (exp, 1)) | |
5488 | && (call_expr_nargs (exp) < 3 | |
5489 | || !TREE_SIDE_EFFECTS (CALL_EXPR_ARG (exp, 2)))); | |
5490 | return target; | |
5491 | } | |
5492 | ||
c22de3f0 | 5493 | void |
aecda0d6 | 5494 | expand_builtin_trap (void) |
a0ef1725 | 5495 | { |
4db8dd0c | 5496 | if (targetm.have_trap ()) |
f73960eb | 5497 | { |
4db8dd0c | 5498 | rtx_insn *insn = emit_insn (targetm.gen_trap ()); |
f73960eb | 5499 | /* For trap insns when not accumulating outgoing args force |
5500 | REG_ARGS_SIZE note to prevent crossjumping of calls with | |
5501 | different args sizes. */ | |
5502 | if (!ACCUMULATE_OUTGOING_ARGS) | |
f6a1fc98 | 5503 | add_args_size_note (insn, stack_pointer_delta); |
f73960eb | 5504 | } |
a0ef1725 | 5505 | else |
61ffc71a | 5506 | { |
5507 | tree fn = builtin_decl_implicit (BUILT_IN_ABORT); | |
5508 | tree call_expr = build_call_expr (fn, 0); | |
5509 | expand_call (call_expr, NULL_RTX, false); | |
5510 | } | |
5511 | ||
a0ef1725 | 5512 | emit_barrier (); |
5513 | } | |
78a74442 | 5514 | |
d2b48f0c | 5515 | /* Expand a call to __builtin_unreachable. We do nothing except emit |
5516 | a barrier saying that control flow will not pass here. | |
5517 | ||
5518 | It is the responsibility of the program being compiled to ensure | |
5519 | that control flow does never reach __builtin_unreachable. */ | |
5520 | static void | |
5521 | expand_builtin_unreachable (void) | |
5522 | { | |
5523 | emit_barrier (); | |
5524 | } | |
5525 | ||
c2f47e15 | 5526 | /* Expand EXP, a call to fabs, fabsf or fabsl. |
5527 | Return NULL_RTX if a normal call should be emitted rather than expanding | |
78a74442 | 5528 | the function inline. If convenient, the result should be placed |
5529 | in TARGET. SUBTARGET may be used as the target for computing | |
5530 | the operand. */ | |
5531 | ||
5532 | static rtx | |
c2f47e15 | 5533 | expand_builtin_fabs (tree exp, rtx target, rtx subtarget) |
78a74442 | 5534 | { |
3754d046 | 5535 | machine_mode mode; |
78a74442 | 5536 | tree arg; |
5537 | rtx op0; | |
5538 | ||
c2f47e15 | 5539 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
5540 | return NULL_RTX; | |
78a74442 | 5541 | |
c2f47e15 | 5542 | arg = CALL_EXPR_ARG (exp, 0); |
c7f617c2 | 5543 | CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg); |
78a74442 | 5544 | mode = TYPE_MODE (TREE_TYPE (arg)); |
1db6d067 | 5545 | op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL); |
78a74442 | 5546 | return expand_abs (mode, op0, target, 0, safe_from_p (target, arg, 1)); |
5547 | } | |
5548 | ||
c2f47e15 | 5549 | /* Expand EXP, a call to copysign, copysignf, or copysignl. |
270436f3 | 5550 | Return NULL is a normal call should be emitted rather than expanding the |
5551 | function inline. If convenient, the result should be placed in TARGET. | |
5552 | SUBTARGET may be used as the target for computing the operand. */ | |
5553 | ||
5554 | static rtx | |
c2f47e15 | 5555 | expand_builtin_copysign (tree exp, rtx target, rtx subtarget) |
270436f3 | 5556 | { |
5557 | rtx op0, op1; | |
5558 | tree arg; | |
5559 | ||
c2f47e15 | 5560 | if (!validate_arglist (exp, REAL_TYPE, REAL_TYPE, VOID_TYPE)) |
5561 | return NULL_RTX; | |
270436f3 | 5562 | |
c2f47e15 | 5563 | arg = CALL_EXPR_ARG (exp, 0); |
8ec3c5c2 | 5564 | op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL); |
270436f3 | 5565 | |
c2f47e15 | 5566 | arg = CALL_EXPR_ARG (exp, 1); |
8ec3c5c2 | 5567 | op1 = expand_normal (arg); |
270436f3 | 5568 | |
5569 | return expand_copysign (op0, op1, target); | |
5570 | } | |
5571 | ||
ac8fb6db | 5572 | /* Expand a call to __builtin___clear_cache. */ |
5573 | ||
5574 | static rtx | |
32e17df0 | 5575 | expand_builtin___clear_cache (tree exp) |
ac8fb6db | 5576 | { |
32e17df0 | 5577 | if (!targetm.code_for_clear_cache) |
5578 | { | |
ac8fb6db | 5579 | #ifdef CLEAR_INSN_CACHE |
32e17df0 | 5580 | /* There is no "clear_cache" insn, and __clear_cache() in libgcc |
5581 | does something. Just do the default expansion to a call to | |
5582 | __clear_cache(). */ | |
5583 | return NULL_RTX; | |
ac8fb6db | 5584 | #else |
32e17df0 | 5585 | /* There is no "clear_cache" insn, and __clear_cache() in libgcc |
5586 | does nothing. There is no need to call it. Do nothing. */ | |
5587 | return const0_rtx; | |
ac8fb6db | 5588 | #endif /* CLEAR_INSN_CACHE */ |
32e17df0 | 5589 | } |
5590 | ||
ac8fb6db | 5591 | /* We have a "clear_cache" insn, and it will handle everything. */ |
5592 | tree begin, end; | |
5593 | rtx begin_rtx, end_rtx; | |
ac8fb6db | 5594 | |
5595 | /* We must not expand to a library call. If we did, any | |
5596 | fallback library function in libgcc that might contain a call to | |
5597 | __builtin___clear_cache() would recurse infinitely. */ | |
5598 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) | |
5599 | { | |
5600 | error ("both arguments to %<__builtin___clear_cache%> must be pointers"); | |
5601 | return const0_rtx; | |
5602 | } | |
5603 | ||
32e17df0 | 5604 | if (targetm.have_clear_cache ()) |
ac8fb6db | 5605 | { |
8786db1e | 5606 | struct expand_operand ops[2]; |
ac8fb6db | 5607 | |
5608 | begin = CALL_EXPR_ARG (exp, 0); | |
5609 | begin_rtx = expand_expr (begin, NULL_RTX, Pmode, EXPAND_NORMAL); | |
ac8fb6db | 5610 | |
5611 | end = CALL_EXPR_ARG (exp, 1); | |
5612 | end_rtx = expand_expr (end, NULL_RTX, Pmode, EXPAND_NORMAL); | |
ac8fb6db | 5613 | |
8786db1e | 5614 | create_address_operand (&ops[0], begin_rtx); |
5615 | create_address_operand (&ops[1], end_rtx); | |
32e17df0 | 5616 | if (maybe_expand_insn (targetm.code_for_clear_cache, 2, ops)) |
8786db1e | 5617 | return const0_rtx; |
ac8fb6db | 5618 | } |
5619 | return const0_rtx; | |
ac8fb6db | 5620 | } |
5621 | ||
4ee9c684 | 5622 | /* Given a trampoline address, make sure it satisfies TRAMPOLINE_ALIGNMENT. */ |
5623 | ||
5624 | static rtx | |
5625 | round_trampoline_addr (rtx tramp) | |
5626 | { | |
5627 | rtx temp, addend, mask; | |
5628 | ||
5629 | /* If we don't need too much alignment, we'll have been guaranteed | |
5630 | proper alignment by get_trampoline_type. */ | |
5631 | if (TRAMPOLINE_ALIGNMENT <= STACK_BOUNDARY) | |
5632 | return tramp; | |
5633 | ||
5634 | /* Round address up to desired boundary. */ | |
5635 | temp = gen_reg_rtx (Pmode); | |
0359f9f5 | 5636 | addend = gen_int_mode (TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT - 1, Pmode); |
5637 | mask = gen_int_mode (-TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT, Pmode); | |
4ee9c684 | 5638 | |
5639 | temp = expand_simple_binop (Pmode, PLUS, tramp, addend, | |
5640 | temp, 0, OPTAB_LIB_WIDEN); | |
5641 | tramp = expand_simple_binop (Pmode, AND, temp, mask, | |
5642 | temp, 0, OPTAB_LIB_WIDEN); | |
5643 | ||
5644 | return tramp; | |
5645 | } | |
5646 | ||
5647 | static rtx | |
c307f106 | 5648 | expand_builtin_init_trampoline (tree exp, bool onstack) |
4ee9c684 | 5649 | { |
5650 | tree t_tramp, t_func, t_chain; | |
82c7907c | 5651 | rtx m_tramp, r_tramp, r_chain, tmp; |
4ee9c684 | 5652 | |
c2f47e15 | 5653 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, |
4ee9c684 | 5654 | POINTER_TYPE, VOID_TYPE)) |
5655 | return NULL_RTX; | |
5656 | ||
c2f47e15 | 5657 | t_tramp = CALL_EXPR_ARG (exp, 0); |
5658 | t_func = CALL_EXPR_ARG (exp, 1); | |
5659 | t_chain = CALL_EXPR_ARG (exp, 2); | |
4ee9c684 | 5660 | |
8ec3c5c2 | 5661 | r_tramp = expand_normal (t_tramp); |
82c7907c | 5662 | m_tramp = gen_rtx_MEM (BLKmode, r_tramp); |
5663 | MEM_NOTRAP_P (m_tramp) = 1; | |
5664 | ||
c307f106 | 5665 | /* If ONSTACK, the TRAMP argument should be the address of a field |
5666 | within the local function's FRAME decl. Either way, let's see if | |
5667 | we can fill in the MEM_ATTRs for this memory. */ | |
82c7907c | 5668 | if (TREE_CODE (t_tramp) == ADDR_EXPR) |
f4146cb8 | 5669 | set_mem_attributes (m_tramp, TREE_OPERAND (t_tramp, 0), true); |
82c7907c | 5670 | |
c307f106 | 5671 | /* Creator of a heap trampoline is responsible for making sure the |
5672 | address is aligned to at least STACK_BOUNDARY. Normally malloc | |
5673 | will ensure this anyhow. */ | |
82c7907c | 5674 | tmp = round_trampoline_addr (r_tramp); |
5675 | if (tmp != r_tramp) | |
5676 | { | |
5677 | m_tramp = change_address (m_tramp, BLKmode, tmp); | |
5678 | set_mem_align (m_tramp, TRAMPOLINE_ALIGNMENT); | |
5b2a69fa | 5679 | set_mem_size (m_tramp, TRAMPOLINE_SIZE); |
82c7907c | 5680 | } |
5681 | ||
5682 | /* The FUNC argument should be the address of the nested function. | |
5683 | Extract the actual function decl to pass to the hook. */ | |
5684 | gcc_assert (TREE_CODE (t_func) == ADDR_EXPR); | |
5685 | t_func = TREE_OPERAND (t_func, 0); | |
5686 | gcc_assert (TREE_CODE (t_func) == FUNCTION_DECL); | |
5687 | ||
8ec3c5c2 | 5688 | r_chain = expand_normal (t_chain); |
4ee9c684 | 5689 | |
5690 | /* Generate insns to initialize the trampoline. */ | |
82c7907c | 5691 | targetm.calls.trampoline_init (m_tramp, t_func, r_chain); |
4ee9c684 | 5692 | |
c307f106 | 5693 | if (onstack) |
5694 | { | |
5695 | trampolines_created = 1; | |
8bc8a8f4 | 5696 | |
a27e3913 | 5697 | if (targetm.calls.custom_function_descriptors != 0) |
5698 | warning_at (DECL_SOURCE_LOCATION (t_func), OPT_Wtrampolines, | |
5699 | "trampoline generated for nested function %qD", t_func); | |
c307f106 | 5700 | } |
8bc8a8f4 | 5701 | |
4ee9c684 | 5702 | return const0_rtx; |
5703 | } | |
5704 | ||
5705 | static rtx | |
c2f47e15 | 5706 | expand_builtin_adjust_trampoline (tree exp) |
4ee9c684 | 5707 | { |
5708 | rtx tramp; | |
5709 | ||
c2f47e15 | 5710 | if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) |
4ee9c684 | 5711 | return NULL_RTX; |
5712 | ||
c2f47e15 | 5713 | tramp = expand_normal (CALL_EXPR_ARG (exp, 0)); |
4ee9c684 | 5714 | tramp = round_trampoline_addr (tramp); |
82c7907c | 5715 | if (targetm.calls.trampoline_adjust_address) |
5716 | tramp = targetm.calls.trampoline_adjust_address (tramp); | |
4ee9c684 | 5717 | |
5718 | return tramp; | |
5719 | } | |
5720 | ||
a27e3913 | 5721 | /* Expand a call to the builtin descriptor initialization routine. |
5722 | A descriptor is made up of a couple of pointers to the static | |
5723 | chain and the code entry in this order. */ | |
5724 | ||
5725 | static rtx | |
5726 | expand_builtin_init_descriptor (tree exp) | |
5727 | { | |
5728 | tree t_descr, t_func, t_chain; | |
5729 | rtx m_descr, r_descr, r_func, r_chain; | |
5730 | ||
5731 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, POINTER_TYPE, | |
5732 | VOID_TYPE)) | |
5733 | return NULL_RTX; | |
5734 | ||
5735 | t_descr = CALL_EXPR_ARG (exp, 0); | |
5736 | t_func = CALL_EXPR_ARG (exp, 1); | |
5737 | t_chain = CALL_EXPR_ARG (exp, 2); | |
5738 | ||
5739 | r_descr = expand_normal (t_descr); | |
5740 | m_descr = gen_rtx_MEM (BLKmode, r_descr); | |
5741 | MEM_NOTRAP_P (m_descr) = 1; | |
5742 | ||
5743 | r_func = expand_normal (t_func); | |
5744 | r_chain = expand_normal (t_chain); | |
5745 | ||
5746 | /* Generate insns to initialize the descriptor. */ | |
5747 | emit_move_insn (adjust_address_nv (m_descr, ptr_mode, 0), r_chain); | |
5748 | emit_move_insn (adjust_address_nv (m_descr, ptr_mode, | |
5749 | POINTER_SIZE / BITS_PER_UNIT), r_func); | |
5750 | ||
5751 | return const0_rtx; | |
5752 | } | |
5753 | ||
5754 | /* Expand a call to the builtin descriptor adjustment routine. */ | |
5755 | ||
5756 | static rtx | |
5757 | expand_builtin_adjust_descriptor (tree exp) | |
5758 | { | |
5759 | rtx tramp; | |
5760 | ||
5761 | if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) | |
5762 | return NULL_RTX; | |
5763 | ||
5764 | tramp = expand_normal (CALL_EXPR_ARG (exp, 0)); | |
5765 | ||
5766 | /* Unalign the descriptor to allow runtime identification. */ | |
5767 | tramp = plus_constant (ptr_mode, tramp, | |
5768 | targetm.calls.custom_function_descriptors); | |
5769 | ||
5770 | return force_operand (tramp, NULL_RTX); | |
5771 | } | |
5772 | ||
93f564d6 | 5773 | /* Expand the call EXP to the built-in signbit, signbitf or signbitl |
5774 | function. The function first checks whether the back end provides | |
5775 | an insn to implement signbit for the respective mode. If not, it | |
5776 | checks whether the floating point format of the value is such that | |
10902624 | 5777 | the sign bit can be extracted. If that is not the case, error out. |
5778 | EXP is the expression that is a call to the builtin function; if | |
5779 | convenient, the result should be placed in TARGET. */ | |
27f261ef | 5780 | static rtx |
5781 | expand_builtin_signbit (tree exp, rtx target) | |
5782 | { | |
5783 | const struct real_format *fmt; | |
299dd9fa | 5784 | scalar_float_mode fmode; |
f77c4496 | 5785 | scalar_int_mode rmode, imode; |
c2f47e15 | 5786 | tree arg; |
ca4f1f5b | 5787 | int word, bitpos; |
27eda240 | 5788 | enum insn_code icode; |
27f261ef | 5789 | rtx temp; |
389dd41b | 5790 | location_t loc = EXPR_LOCATION (exp); |
27f261ef | 5791 | |
c2f47e15 | 5792 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
5793 | return NULL_RTX; | |
27f261ef | 5794 | |
c2f47e15 | 5795 | arg = CALL_EXPR_ARG (exp, 0); |
299dd9fa | 5796 | fmode = SCALAR_FLOAT_TYPE_MODE (TREE_TYPE (arg)); |
03b7a719 | 5797 | rmode = SCALAR_INT_TYPE_MODE (TREE_TYPE (exp)); |
27f261ef | 5798 | fmt = REAL_MODE_FORMAT (fmode); |
5799 | ||
93f564d6 | 5800 | arg = builtin_save_expr (arg); |
5801 | ||
5802 | /* Expand the argument yielding a RTX expression. */ | |
5803 | temp = expand_normal (arg); | |
5804 | ||
5805 | /* Check if the back end provides an insn that handles signbit for the | |
5806 | argument's mode. */ | |
d6bf3b14 | 5807 | icode = optab_handler (signbit_optab, fmode); |
27eda240 | 5808 | if (icode != CODE_FOR_nothing) |
93f564d6 | 5809 | { |
1e0c0b35 | 5810 | rtx_insn *last = get_last_insn (); |
93f564d6 | 5811 | target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp))); |
4e2a2fb4 | 5812 | if (maybe_emit_unop_insn (icode, target, temp, UNKNOWN)) |
5813 | return target; | |
5814 | delete_insns_since (last); | |
93f564d6 | 5815 | } |
5816 | ||
27f261ef | 5817 | /* For floating point formats without a sign bit, implement signbit |
5818 | as "ARG < 0.0". */ | |
8d564692 | 5819 | bitpos = fmt->signbit_ro; |
ca4f1f5b | 5820 | if (bitpos < 0) |
27f261ef | 5821 | { |
5822 | /* But we can't do this if the format supports signed zero. */ | |
10902624 | 5823 | gcc_assert (!fmt->has_signed_zero || !HONOR_SIGNED_ZEROS (fmode)); |
27f261ef | 5824 | |
389dd41b | 5825 | arg = fold_build2_loc (loc, LT_EXPR, TREE_TYPE (exp), arg, |
49d00087 | 5826 | build_real (TREE_TYPE (arg), dconst0)); |
27f261ef | 5827 | return expand_expr (arg, target, VOIDmode, EXPAND_NORMAL); |
5828 | } | |
5829 | ||
ca4f1f5b | 5830 | if (GET_MODE_SIZE (fmode) <= UNITS_PER_WORD) |
27f261ef | 5831 | { |
2cf1bb25 | 5832 | imode = int_mode_for_mode (fmode).require (); |
ca4f1f5b | 5833 | temp = gen_lowpart (imode, temp); |
24fd4260 | 5834 | } |
5835 | else | |
5836 | { | |
ca4f1f5b | 5837 | imode = word_mode; |
5838 | /* Handle targets with different FP word orders. */ | |
5839 | if (FLOAT_WORDS_BIG_ENDIAN) | |
a0c938f0 | 5840 | word = (GET_MODE_BITSIZE (fmode) - bitpos) / BITS_PER_WORD; |
ca4f1f5b | 5841 | else |
a0c938f0 | 5842 | word = bitpos / BITS_PER_WORD; |
ca4f1f5b | 5843 | temp = operand_subword_force (temp, word, fmode); |
5844 | bitpos = bitpos % BITS_PER_WORD; | |
5845 | } | |
5846 | ||
44b0f1d0 | 5847 | /* Force the intermediate word_mode (or narrower) result into a |
5848 | register. This avoids attempting to create paradoxical SUBREGs | |
5849 | of floating point modes below. */ | |
5850 | temp = force_reg (imode, temp); | |
5851 | ||
ca4f1f5b | 5852 | /* If the bitpos is within the "result mode" lowpart, the operation |
5853 | can be implement with a single bitwise AND. Otherwise, we need | |
5854 | a right shift and an AND. */ | |
5855 | ||
5856 | if (bitpos < GET_MODE_BITSIZE (rmode)) | |
5857 | { | |
796b6678 | 5858 | wide_int mask = wi::set_bit_in_zero (bitpos, GET_MODE_PRECISION (rmode)); |
27f261ef | 5859 | |
4a46f016 | 5860 | if (GET_MODE_SIZE (imode) > GET_MODE_SIZE (rmode)) |
ca4f1f5b | 5861 | temp = gen_lowpart (rmode, temp); |
24fd4260 | 5862 | temp = expand_binop (rmode, and_optab, temp, |
e913b5cd | 5863 | immed_wide_int_const (mask, rmode), |
ca4f1f5b | 5864 | NULL_RTX, 1, OPTAB_LIB_WIDEN); |
27f261ef | 5865 | } |
ca4f1f5b | 5866 | else |
5867 | { | |
5868 | /* Perform a logical right shift to place the signbit in the least | |
a0c938f0 | 5869 | significant bit, then truncate the result to the desired mode |
ca4f1f5b | 5870 | and mask just this bit. */ |
f5ff0b21 | 5871 | temp = expand_shift (RSHIFT_EXPR, imode, temp, bitpos, NULL_RTX, 1); |
ca4f1f5b | 5872 | temp = gen_lowpart (rmode, temp); |
5873 | temp = expand_binop (rmode, and_optab, temp, const1_rtx, | |
5874 | NULL_RTX, 1, OPTAB_LIB_WIDEN); | |
5875 | } | |
5876 | ||
27f261ef | 5877 | return temp; |
5878 | } | |
73673831 | 5879 | |
5880 | /* Expand fork or exec calls. TARGET is the desired target of the | |
c2f47e15 | 5881 | call. EXP is the call. FN is the |
73673831 | 5882 | identificator of the actual function. IGNORE is nonzero if the |
5883 | value is to be ignored. */ | |
5884 | ||
5885 | static rtx | |
c2f47e15 | 5886 | expand_builtin_fork_or_exec (tree fn, tree exp, rtx target, int ignore) |
73673831 | 5887 | { |
5888 | tree id, decl; | |
5889 | tree call; | |
5890 | ||
5891 | /* If we are not profiling, just call the function. */ | |
5892 | if (!profile_arc_flag) | |
5893 | return NULL_RTX; | |
5894 | ||
5895 | /* Otherwise call the wrapper. This should be equivalent for the rest of | |
5896 | compiler, so the code does not diverge, and the wrapper may run the | |
9c9bad97 | 5897 | code necessary for keeping the profiling sane. */ |
73673831 | 5898 | |
5899 | switch (DECL_FUNCTION_CODE (fn)) | |
5900 | { | |
5901 | case BUILT_IN_FORK: | |
5902 | id = get_identifier ("__gcov_fork"); | |
5903 | break; | |
5904 | ||
5905 | case BUILT_IN_EXECL: | |
5906 | id = get_identifier ("__gcov_execl"); | |
5907 | break; | |
5908 | ||
5909 | case BUILT_IN_EXECV: | |
5910 | id = get_identifier ("__gcov_execv"); | |
5911 | break; | |
5912 | ||
5913 | case BUILT_IN_EXECLP: | |
5914 | id = get_identifier ("__gcov_execlp"); | |
5915 | break; | |
5916 | ||
5917 | case BUILT_IN_EXECLE: | |
5918 | id = get_identifier ("__gcov_execle"); | |
5919 | break; | |
5920 | ||
5921 | case BUILT_IN_EXECVP: | |
5922 | id = get_identifier ("__gcov_execvp"); | |
5923 | break; | |
5924 | ||
5925 | case BUILT_IN_EXECVE: | |
5926 | id = get_identifier ("__gcov_execve"); | |
5927 | break; | |
5928 | ||
5929 | default: | |
64db345d | 5930 | gcc_unreachable (); |
73673831 | 5931 | } |
5932 | ||
e60a6f7b | 5933 | decl = build_decl (DECL_SOURCE_LOCATION (fn), |
5934 | FUNCTION_DECL, id, TREE_TYPE (fn)); | |
73673831 | 5935 | DECL_EXTERNAL (decl) = 1; |
5936 | TREE_PUBLIC (decl) = 1; | |
5937 | DECL_ARTIFICIAL (decl) = 1; | |
5938 | TREE_NOTHROW (decl) = 1; | |
e82d310b | 5939 | DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT; |
5940 | DECL_VISIBILITY_SPECIFIED (decl) = 1; | |
389dd41b | 5941 | call = rewrite_call_expr (EXPR_LOCATION (exp), exp, 0, decl, 0); |
73673831 | 5942 | return expand_call (call, target, ignore); |
c2f47e15 | 5943 | } |
48e1416a | 5944 | |
b6a5fc45 | 5945 | |
5946 | \f | |
3e272de8 | 5947 | /* Reconstitute a mode for a __sync intrinsic operation. Since the type of |
5948 | the pointer in these functions is void*, the tree optimizers may remove | |
5949 | casts. The mode computed in expand_builtin isn't reliable either, due | |
5950 | to __sync_bool_compare_and_swap. | |
5951 | ||
5952 | FCODE_DIFF should be fcode - base, where base is the FOO_1 code for the | |
5953 | group of builtins. This gives us log2 of the mode size. */ | |
5954 | ||
3754d046 | 5955 | static inline machine_mode |
3e272de8 | 5956 | get_builtin_sync_mode (int fcode_diff) |
5957 | { | |
ad3a13b5 | 5958 | /* The size is not negotiable, so ask not to get BLKmode in return |
5959 | if the target indicates that a smaller size would be better. */ | |
517be012 | 5960 | return int_mode_for_size (BITS_PER_UNIT << fcode_diff, 0).require (); |
3e272de8 | 5961 | } |
5962 | ||
041e0215 | 5963 | /* Expand the memory expression LOC and return the appropriate memory operand |
5964 | for the builtin_sync operations. */ | |
5965 | ||
5966 | static rtx | |
3754d046 | 5967 | get_builtin_sync_mem (tree loc, machine_mode mode) |
041e0215 | 5968 | { |
5969 | rtx addr, mem; | |
fcbc2234 | 5970 | int addr_space = TYPE_ADDR_SPACE (POINTER_TYPE_P (TREE_TYPE (loc)) |
5971 | ? TREE_TYPE (TREE_TYPE (loc)) | |
5972 | : TREE_TYPE (loc)); | |
5973 | scalar_int_mode addr_mode = targetm.addr_space.address_mode (addr_space); | |
041e0215 | 5974 | |
fcbc2234 | 5975 | addr = expand_expr (loc, NULL_RTX, addr_mode, EXPAND_SUM); |
ed825d83 | 5976 | addr = convert_memory_address (addr_mode, addr); |
041e0215 | 5977 | |
5978 | /* Note that we explicitly do not want any alias information for this | |
5979 | memory, so that we kill all other live memories. Otherwise we don't | |
5980 | satisfy the full barrier semantics of the intrinsic. */ | |
fcbc2234 | 5981 | mem = gen_rtx_MEM (mode, addr); |
5982 | ||
5983 | set_mem_addr_space (mem, addr_space); | |
5984 | ||
5985 | mem = validize_mem (mem); | |
041e0215 | 5986 | |
153c3b50 | 5987 | /* The alignment needs to be at least according to that of the mode. */ |
5988 | set_mem_align (mem, MAX (GET_MODE_ALIGNMENT (mode), | |
957d0361 | 5989 | get_pointer_alignment (loc))); |
c94cfd1c | 5990 | set_mem_alias_set (mem, ALIAS_SET_MEMORY_BARRIER); |
041e0215 | 5991 | MEM_VOLATILE_P (mem) = 1; |
5992 | ||
5993 | return mem; | |
5994 | } | |
5995 | ||
1cd6e20d | 5996 | /* Make sure an argument is in the right mode. |
5997 | EXP is the tree argument. | |
5998 | MODE is the mode it should be in. */ | |
5999 | ||
6000 | static rtx | |
3754d046 | 6001 | expand_expr_force_mode (tree exp, machine_mode mode) |
1cd6e20d | 6002 | { |
6003 | rtx val; | |
3754d046 | 6004 | machine_mode old_mode; |
1cd6e20d | 6005 | |
6006 | val = expand_expr (exp, NULL_RTX, mode, EXPAND_NORMAL); | |
6007 | /* If VAL is promoted to a wider mode, convert it back to MODE. Take care | |
6008 | of CONST_INTs, where we know the old_mode only from the call argument. */ | |
6009 | ||
6010 | old_mode = GET_MODE (val); | |
6011 | if (old_mode == VOIDmode) | |
6012 | old_mode = TYPE_MODE (TREE_TYPE (exp)); | |
6013 | val = convert_modes (mode, old_mode, val, 1); | |
6014 | return val; | |
6015 | } | |
6016 | ||
6017 | ||
b6a5fc45 | 6018 | /* Expand the __sync_xxx_and_fetch and __sync_fetch_and_xxx intrinsics. |
c2f47e15 | 6019 | EXP is the CALL_EXPR. CODE is the rtx code |
b6a5fc45 | 6020 | that corresponds to the arithmetic or logical operation from the name; |
6021 | an exception here is that NOT actually means NAND. TARGET is an optional | |
6022 | place for us to store the results; AFTER is true if this is the | |
1cd6e20d | 6023 | fetch_and_xxx form. */ |
b6a5fc45 | 6024 | |
6025 | static rtx | |
3754d046 | 6026 | expand_builtin_sync_operation (machine_mode mode, tree exp, |
3e272de8 | 6027 | enum rtx_code code, bool after, |
1cd6e20d | 6028 | rtx target) |
b6a5fc45 | 6029 | { |
041e0215 | 6030 | rtx val, mem; |
e60a6f7b | 6031 | location_t loc = EXPR_LOCATION (exp); |
b6a5fc45 | 6032 | |
cf73e559 | 6033 | if (code == NOT && warn_sync_nand) |
6034 | { | |
6035 | tree fndecl = get_callee_fndecl (exp); | |
6036 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
6037 | ||
6038 | static bool warned_f_a_n, warned_n_a_f; | |
6039 | ||
6040 | switch (fcode) | |
6041 | { | |
2797f13a | 6042 | case BUILT_IN_SYNC_FETCH_AND_NAND_1: |
6043 | case BUILT_IN_SYNC_FETCH_AND_NAND_2: | |
6044 | case BUILT_IN_SYNC_FETCH_AND_NAND_4: | |
6045 | case BUILT_IN_SYNC_FETCH_AND_NAND_8: | |
6046 | case BUILT_IN_SYNC_FETCH_AND_NAND_16: | |
cf73e559 | 6047 | if (warned_f_a_n) |
6048 | break; | |
6049 | ||
b9a16870 | 6050 | fndecl = builtin_decl_implicit (BUILT_IN_SYNC_FETCH_AND_NAND_N); |
e60a6f7b | 6051 | inform (loc, "%qD changed semantics in GCC 4.4", fndecl); |
cf73e559 | 6052 | warned_f_a_n = true; |
6053 | break; | |
6054 | ||
2797f13a | 6055 | case BUILT_IN_SYNC_NAND_AND_FETCH_1: |
6056 | case BUILT_IN_SYNC_NAND_AND_FETCH_2: | |
6057 | case BUILT_IN_SYNC_NAND_AND_FETCH_4: | |
6058 | case BUILT_IN_SYNC_NAND_AND_FETCH_8: | |
6059 | case BUILT_IN_SYNC_NAND_AND_FETCH_16: | |
cf73e559 | 6060 | if (warned_n_a_f) |
6061 | break; | |
6062 | ||
b9a16870 | 6063 | fndecl = builtin_decl_implicit (BUILT_IN_SYNC_NAND_AND_FETCH_N); |
e60a6f7b | 6064 | inform (loc, "%qD changed semantics in GCC 4.4", fndecl); |
cf73e559 | 6065 | warned_n_a_f = true; |
6066 | break; | |
6067 | ||
6068 | default: | |
6069 | gcc_unreachable (); | |
6070 | } | |
6071 | } | |
6072 | ||
b6a5fc45 | 6073 | /* Expand the operands. */ |
c2f47e15 | 6074 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); |
1cd6e20d | 6075 | val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); |
b6a5fc45 | 6076 | |
a372f7ca | 6077 | return expand_atomic_fetch_op (target, mem, val, code, MEMMODEL_SYNC_SEQ_CST, |
1cd6e20d | 6078 | after); |
b6a5fc45 | 6079 | } |
6080 | ||
6081 | /* Expand the __sync_val_compare_and_swap and __sync_bool_compare_and_swap | |
c2f47e15 | 6082 | intrinsics. EXP is the CALL_EXPR. IS_BOOL is |
b6a5fc45 | 6083 | true if this is the boolean form. TARGET is a place for us to store the |
6084 | results; this is NOT optional if IS_BOOL is true. */ | |
6085 | ||
6086 | static rtx | |
3754d046 | 6087 | expand_builtin_compare_and_swap (machine_mode mode, tree exp, |
3e272de8 | 6088 | bool is_bool, rtx target) |
b6a5fc45 | 6089 | { |
041e0215 | 6090 | rtx old_val, new_val, mem; |
ba885f6a | 6091 | rtx *pbool, *poval; |
b6a5fc45 | 6092 | |
6093 | /* Expand the operands. */ | |
c2f47e15 | 6094 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); |
1cd6e20d | 6095 | old_val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); |
6096 | new_val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 2), mode); | |
b6a5fc45 | 6097 | |
ba885f6a | 6098 | pbool = poval = NULL; |
6099 | if (target != const0_rtx) | |
6100 | { | |
6101 | if (is_bool) | |
6102 | pbool = ⌖ | |
6103 | else | |
6104 | poval = ⌖ | |
6105 | } | |
6106 | if (!expand_atomic_compare_and_swap (pbool, poval, mem, old_val, new_val, | |
a372f7ca | 6107 | false, MEMMODEL_SYNC_SEQ_CST, |
6108 | MEMMODEL_SYNC_SEQ_CST)) | |
1cd6e20d | 6109 | return NULL_RTX; |
c2f47e15 | 6110 | |
1cd6e20d | 6111 | return target; |
b6a5fc45 | 6112 | } |
6113 | ||
6114 | /* Expand the __sync_lock_test_and_set intrinsic. Note that the most | |
6115 | general form is actually an atomic exchange, and some targets only | |
6116 | support a reduced form with the second argument being a constant 1. | |
48e1416a | 6117 | EXP is the CALL_EXPR; TARGET is an optional place for us to store |
c2f47e15 | 6118 | the results. */ |
b6a5fc45 | 6119 | |
6120 | static rtx | |
3754d046 | 6121 | expand_builtin_sync_lock_test_and_set (machine_mode mode, tree exp, |
1cd6e20d | 6122 | rtx target) |
b6a5fc45 | 6123 | { |
041e0215 | 6124 | rtx val, mem; |
b6a5fc45 | 6125 | |
6126 | /* Expand the operands. */ | |
c2f47e15 | 6127 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); |
1cd6e20d | 6128 | val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); |
6129 | ||
7821cde1 | 6130 | return expand_sync_lock_test_and_set (target, mem, val); |
1cd6e20d | 6131 | } |
6132 | ||
6133 | /* Expand the __sync_lock_release intrinsic. EXP is the CALL_EXPR. */ | |
6134 | ||
6135 | static void | |
3754d046 | 6136 | expand_builtin_sync_lock_release (machine_mode mode, tree exp) |
1cd6e20d | 6137 | { |
6138 | rtx mem; | |
6139 | ||
6140 | /* Expand the operands. */ | |
6141 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
6142 | ||
a372f7ca | 6143 | expand_atomic_store (mem, const0_rtx, MEMMODEL_SYNC_RELEASE, true); |
1cd6e20d | 6144 | } |
6145 | ||
6146 | /* Given an integer representing an ``enum memmodel'', verify its | |
6147 | correctness and return the memory model enum. */ | |
6148 | ||
6149 | static enum memmodel | |
6150 | get_memmodel (tree exp) | |
6151 | { | |
6152 | rtx op; | |
7f738025 | 6153 | unsigned HOST_WIDE_INT val; |
2cb724f9 | 6154 | source_location loc |
6155 | = expansion_point_location_if_in_system_header (input_location); | |
1cd6e20d | 6156 | |
6157 | /* If the parameter is not a constant, it's a run time value so we'll just | |
6158 | convert it to MEMMODEL_SEQ_CST to avoid annoying runtime checking. */ | |
6159 | if (TREE_CODE (exp) != INTEGER_CST) | |
6160 | return MEMMODEL_SEQ_CST; | |
6161 | ||
6162 | op = expand_normal (exp); | |
7f738025 | 6163 | |
6164 | val = INTVAL (op); | |
6165 | if (targetm.memmodel_check) | |
6166 | val = targetm.memmodel_check (val); | |
6167 | else if (val & ~MEMMODEL_MASK) | |
6168 | { | |
2cb724f9 | 6169 | warning_at (loc, OPT_Winvalid_memory_model, |
6170 | "unknown architecture specifier in memory model to builtin"); | |
7f738025 | 6171 | return MEMMODEL_SEQ_CST; |
6172 | } | |
6173 | ||
a372f7ca | 6174 | /* Should never see a user explicit SYNC memodel model, so >= LAST works. */ |
6175 | if (memmodel_base (val) >= MEMMODEL_LAST) | |
1cd6e20d | 6176 | { |
2cb724f9 | 6177 | warning_at (loc, OPT_Winvalid_memory_model, |
6178 | "invalid memory model argument to builtin"); | |
1cd6e20d | 6179 | return MEMMODEL_SEQ_CST; |
6180 | } | |
7f738025 | 6181 | |
3070f133 | 6182 | /* Workaround for Bugzilla 59448. GCC doesn't track consume properly, so |
6183 | be conservative and promote consume to acquire. */ | |
6184 | if (val == MEMMODEL_CONSUME) | |
6185 | val = MEMMODEL_ACQUIRE; | |
6186 | ||
7f738025 | 6187 | return (enum memmodel) val; |
1cd6e20d | 6188 | } |
6189 | ||
6190 | /* Expand the __atomic_exchange intrinsic: | |
6191 | TYPE __atomic_exchange (TYPE *object, TYPE desired, enum memmodel) | |
6192 | EXP is the CALL_EXPR. | |
6193 | TARGET is an optional place for us to store the results. */ | |
6194 | ||
6195 | static rtx | |
3754d046 | 6196 | expand_builtin_atomic_exchange (machine_mode mode, tree exp, rtx target) |
1cd6e20d | 6197 | { |
6198 | rtx val, mem; | |
6199 | enum memmodel model; | |
6200 | ||
6201 | model = get_memmodel (CALL_EXPR_ARG (exp, 2)); | |
1cd6e20d | 6202 | |
6203 | if (!flag_inline_atomics) | |
6204 | return NULL_RTX; | |
6205 | ||
6206 | /* Expand the operands. */ | |
6207 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
6208 | val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); | |
6209 | ||
7821cde1 | 6210 | return expand_atomic_exchange (target, mem, val, model); |
1cd6e20d | 6211 | } |
6212 | ||
6213 | /* Expand the __atomic_compare_exchange intrinsic: | |
6214 | bool __atomic_compare_exchange (TYPE *object, TYPE *expect, | |
6215 | TYPE desired, BOOL weak, | |
6216 | enum memmodel success, | |
6217 | enum memmodel failure) | |
6218 | EXP is the CALL_EXPR. | |
6219 | TARGET is an optional place for us to store the results. */ | |
6220 | ||
6221 | static rtx | |
3754d046 | 6222 | expand_builtin_atomic_compare_exchange (machine_mode mode, tree exp, |
1cd6e20d | 6223 | rtx target) |
6224 | { | |
1e0c0b35 | 6225 | rtx expect, desired, mem, oldval; |
6226 | rtx_code_label *label; | |
1cd6e20d | 6227 | enum memmodel success, failure; |
6228 | tree weak; | |
6229 | bool is_weak; | |
2cb724f9 | 6230 | source_location loc |
6231 | = expansion_point_location_if_in_system_header (input_location); | |
1cd6e20d | 6232 | |
6233 | success = get_memmodel (CALL_EXPR_ARG (exp, 4)); | |
6234 | failure = get_memmodel (CALL_EXPR_ARG (exp, 5)); | |
6235 | ||
086f4e33 | 6236 | if (failure > success) |
6237 | { | |
2cb724f9 | 6238 | warning_at (loc, OPT_Winvalid_memory_model, |
6239 | "failure memory model cannot be stronger than success " | |
6240 | "memory model for %<__atomic_compare_exchange%>"); | |
086f4e33 | 6241 | success = MEMMODEL_SEQ_CST; |
6242 | } | |
6243 | ||
a372f7ca | 6244 | if (is_mm_release (failure) || is_mm_acq_rel (failure)) |
1cd6e20d | 6245 | { |
2cb724f9 | 6246 | warning_at (loc, OPT_Winvalid_memory_model, |
6247 | "invalid failure memory model for " | |
6248 | "%<__atomic_compare_exchange%>"); | |
086f4e33 | 6249 | failure = MEMMODEL_SEQ_CST; |
6250 | success = MEMMODEL_SEQ_CST; | |
1cd6e20d | 6251 | } |
6252 | ||
086f4e33 | 6253 | |
1cd6e20d | 6254 | if (!flag_inline_atomics) |
6255 | return NULL_RTX; | |
6256 | ||
6257 | /* Expand the operands. */ | |
6258 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
6259 | ||
6260 | expect = expand_normal (CALL_EXPR_ARG (exp, 1)); | |
6261 | expect = convert_memory_address (Pmode, expect); | |
c401b131 | 6262 | expect = gen_rtx_MEM (mode, expect); |
1cd6e20d | 6263 | desired = expand_expr_force_mode (CALL_EXPR_ARG (exp, 2), mode); |
6264 | ||
6265 | weak = CALL_EXPR_ARG (exp, 3); | |
6266 | is_weak = false; | |
e913b5cd | 6267 | if (tree_fits_shwi_p (weak) && tree_to_shwi (weak) != 0) |
1cd6e20d | 6268 | is_weak = true; |
6269 | ||
d86e3752 | 6270 | if (target == const0_rtx) |
6271 | target = NULL; | |
d86e3752 | 6272 | |
3c29a9ea | 6273 | /* Lest the rtl backend create a race condition with an imporoper store |
6274 | to memory, always create a new pseudo for OLDVAL. */ | |
6275 | oldval = NULL; | |
6276 | ||
6277 | if (!expand_atomic_compare_and_swap (&target, &oldval, mem, expect, desired, | |
ba885f6a | 6278 | is_weak, success, failure)) |
1cd6e20d | 6279 | return NULL_RTX; |
6280 | ||
d86e3752 | 6281 | /* Conditionally store back to EXPECT, lest we create a race condition |
6282 | with an improper store to memory. */ | |
6283 | /* ??? With a rearrangement of atomics at the gimple level, we can handle | |
6284 | the normal case where EXPECT is totally private, i.e. a register. At | |
6285 | which point the store can be unconditional. */ | |
6286 | label = gen_label_rtx (); | |
62589f76 | 6287 | emit_cmp_and_jump_insns (target, const0_rtx, NE, NULL, |
6288 | GET_MODE (target), 1, label); | |
d86e3752 | 6289 | emit_move_insn (expect, oldval); |
6290 | emit_label (label); | |
c401b131 | 6291 | |
1cd6e20d | 6292 | return target; |
6293 | } | |
6294 | ||
5a5ef659 | 6295 | /* Helper function for expand_ifn_atomic_compare_exchange - expand |
6296 | internal ATOMIC_COMPARE_EXCHANGE call into __atomic_compare_exchange_N | |
6297 | call. The weak parameter must be dropped to match the expected parameter | |
6298 | list and the expected argument changed from value to pointer to memory | |
6299 | slot. */ | |
6300 | ||
6301 | static void | |
6302 | expand_ifn_atomic_compare_exchange_into_call (gcall *call, machine_mode mode) | |
6303 | { | |
6304 | unsigned int z; | |
6305 | vec<tree, va_gc> *vec; | |
6306 | ||
6307 | vec_alloc (vec, 5); | |
6308 | vec->quick_push (gimple_call_arg (call, 0)); | |
6309 | tree expected = gimple_call_arg (call, 1); | |
6310 | rtx x = assign_stack_temp_for_type (mode, GET_MODE_SIZE (mode), | |
6311 | TREE_TYPE (expected)); | |
6312 | rtx expd = expand_expr (expected, x, mode, EXPAND_NORMAL); | |
6313 | if (expd != x) | |
6314 | emit_move_insn (x, expd); | |
6315 | tree v = make_tree (TREE_TYPE (expected), x); | |
6316 | vec->quick_push (build1 (ADDR_EXPR, | |
6317 | build_pointer_type (TREE_TYPE (expected)), v)); | |
6318 | vec->quick_push (gimple_call_arg (call, 2)); | |
6319 | /* Skip the boolean weak parameter. */ | |
6320 | for (z = 4; z < 6; z++) | |
6321 | vec->quick_push (gimple_call_arg (call, z)); | |
5eaf31bb | 6322 | /* At present we only have BUILT_IN_ATOMIC_COMPARE_EXCHANGE_{1,2,4,8,16}. */ |
52acb7ae | 6323 | unsigned int bytes_log2 = exact_log2 (GET_MODE_SIZE (mode).to_constant ()); |
5eaf31bb | 6324 | gcc_assert (bytes_log2 < 5); |
5a5ef659 | 6325 | built_in_function fncode |
6326 | = (built_in_function) ((int) BUILT_IN_ATOMIC_COMPARE_EXCHANGE_1 | |
5eaf31bb | 6327 | + bytes_log2); |
5a5ef659 | 6328 | tree fndecl = builtin_decl_explicit (fncode); |
6329 | tree fn = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fndecl)), | |
6330 | fndecl); | |
6331 | tree exp = build_call_vec (boolean_type_node, fn, vec); | |
6332 | tree lhs = gimple_call_lhs (call); | |
6333 | rtx boolret = expand_call (exp, NULL_RTX, lhs == NULL_TREE); | |
6334 | if (lhs) | |
6335 | { | |
6336 | rtx target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE); | |
6337 | if (GET_MODE (boolret) != mode) | |
6338 | boolret = convert_modes (mode, GET_MODE (boolret), boolret, 1); | |
6339 | x = force_reg (mode, x); | |
6340 | write_complex_part (target, boolret, true); | |
6341 | write_complex_part (target, x, false); | |
6342 | } | |
6343 | } | |
6344 | ||
6345 | /* Expand IFN_ATOMIC_COMPARE_EXCHANGE internal function. */ | |
6346 | ||
6347 | void | |
6348 | expand_ifn_atomic_compare_exchange (gcall *call) | |
6349 | { | |
6350 | int size = tree_to_shwi (gimple_call_arg (call, 3)) & 255; | |
6351 | gcc_assert (size == 1 || size == 2 || size == 4 || size == 8 || size == 16); | |
517be012 | 6352 | machine_mode mode = int_mode_for_size (BITS_PER_UNIT * size, 0).require (); |
5a5ef659 | 6353 | rtx expect, desired, mem, oldval, boolret; |
6354 | enum memmodel success, failure; | |
6355 | tree lhs; | |
6356 | bool is_weak; | |
6357 | source_location loc | |
6358 | = expansion_point_location_if_in_system_header (gimple_location (call)); | |
6359 | ||
6360 | success = get_memmodel (gimple_call_arg (call, 4)); | |
6361 | failure = get_memmodel (gimple_call_arg (call, 5)); | |
6362 | ||
6363 | if (failure > success) | |
6364 | { | |
6365 | warning_at (loc, OPT_Winvalid_memory_model, | |
6366 | "failure memory model cannot be stronger than success " | |
6367 | "memory model for %<__atomic_compare_exchange%>"); | |
6368 | success = MEMMODEL_SEQ_CST; | |
6369 | } | |
6370 | ||
6371 | if (is_mm_release (failure) || is_mm_acq_rel (failure)) | |
6372 | { | |
6373 | warning_at (loc, OPT_Winvalid_memory_model, | |
6374 | "invalid failure memory model for " | |
6375 | "%<__atomic_compare_exchange%>"); | |
6376 | failure = MEMMODEL_SEQ_CST; | |
6377 | success = MEMMODEL_SEQ_CST; | |
6378 | } | |
6379 | ||
6380 | if (!flag_inline_atomics) | |
6381 | { | |
6382 | expand_ifn_atomic_compare_exchange_into_call (call, mode); | |
6383 | return; | |
6384 | } | |
6385 | ||
6386 | /* Expand the operands. */ | |
6387 | mem = get_builtin_sync_mem (gimple_call_arg (call, 0), mode); | |
6388 | ||
6389 | expect = expand_expr_force_mode (gimple_call_arg (call, 1), mode); | |
6390 | desired = expand_expr_force_mode (gimple_call_arg (call, 2), mode); | |
6391 | ||
6392 | is_weak = (tree_to_shwi (gimple_call_arg (call, 3)) & 256) != 0; | |
6393 | ||
6394 | boolret = NULL; | |
6395 | oldval = NULL; | |
6396 | ||
6397 | if (!expand_atomic_compare_and_swap (&boolret, &oldval, mem, expect, desired, | |
6398 | is_weak, success, failure)) | |
6399 | { | |
6400 | expand_ifn_atomic_compare_exchange_into_call (call, mode); | |
6401 | return; | |
6402 | } | |
6403 | ||
6404 | lhs = gimple_call_lhs (call); | |
6405 | if (lhs) | |
6406 | { | |
6407 | rtx target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE); | |
6408 | if (GET_MODE (boolret) != mode) | |
6409 | boolret = convert_modes (mode, GET_MODE (boolret), boolret, 1); | |
6410 | write_complex_part (target, boolret, true); | |
6411 | write_complex_part (target, oldval, false); | |
6412 | } | |
6413 | } | |
6414 | ||
1cd6e20d | 6415 | /* Expand the __atomic_load intrinsic: |
6416 | TYPE __atomic_load (TYPE *object, enum memmodel) | |
6417 | EXP is the CALL_EXPR. | |
6418 | TARGET is an optional place for us to store the results. */ | |
6419 | ||
6420 | static rtx | |
3754d046 | 6421 | expand_builtin_atomic_load (machine_mode mode, tree exp, rtx target) |
1cd6e20d | 6422 | { |
6423 | rtx mem; | |
6424 | enum memmodel model; | |
6425 | ||
6426 | model = get_memmodel (CALL_EXPR_ARG (exp, 1)); | |
a372f7ca | 6427 | if (is_mm_release (model) || is_mm_acq_rel (model)) |
1cd6e20d | 6428 | { |
2cb724f9 | 6429 | source_location loc |
6430 | = expansion_point_location_if_in_system_header (input_location); | |
6431 | warning_at (loc, OPT_Winvalid_memory_model, | |
6432 | "invalid memory model for %<__atomic_load%>"); | |
086f4e33 | 6433 | model = MEMMODEL_SEQ_CST; |
1cd6e20d | 6434 | } |
6435 | ||
6436 | if (!flag_inline_atomics) | |
6437 | return NULL_RTX; | |
6438 | ||
6439 | /* Expand the operand. */ | |
6440 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
6441 | ||
6442 | return expand_atomic_load (target, mem, model); | |
6443 | } | |
6444 | ||
6445 | ||
6446 | /* Expand the __atomic_store intrinsic: | |
6447 | void __atomic_store (TYPE *object, TYPE desired, enum memmodel) | |
6448 | EXP is the CALL_EXPR. | |
6449 | TARGET is an optional place for us to store the results. */ | |
6450 | ||
6451 | static rtx | |
3754d046 | 6452 | expand_builtin_atomic_store (machine_mode mode, tree exp) |
1cd6e20d | 6453 | { |
6454 | rtx mem, val; | |
6455 | enum memmodel model; | |
6456 | ||
6457 | model = get_memmodel (CALL_EXPR_ARG (exp, 2)); | |
a372f7ca | 6458 | if (!(is_mm_relaxed (model) || is_mm_seq_cst (model) |
6459 | || is_mm_release (model))) | |
1cd6e20d | 6460 | { |
2cb724f9 | 6461 | source_location loc |
6462 | = expansion_point_location_if_in_system_header (input_location); | |
6463 | warning_at (loc, OPT_Winvalid_memory_model, | |
6464 | "invalid memory model for %<__atomic_store%>"); | |
086f4e33 | 6465 | model = MEMMODEL_SEQ_CST; |
1cd6e20d | 6466 | } |
6467 | ||
6468 | if (!flag_inline_atomics) | |
6469 | return NULL_RTX; | |
6470 | ||
6471 | /* Expand the operands. */ | |
6472 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
6473 | val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); | |
6474 | ||
8808bf16 | 6475 | return expand_atomic_store (mem, val, model, false); |
1cd6e20d | 6476 | } |
6477 | ||
6478 | /* Expand the __atomic_fetch_XXX intrinsic: | |
6479 | TYPE __atomic_fetch_XXX (TYPE *object, TYPE val, enum memmodel) | |
6480 | EXP is the CALL_EXPR. | |
6481 | TARGET is an optional place for us to store the results. | |
6482 | CODE is the operation, PLUS, MINUS, ADD, XOR, or IOR. | |
6483 | FETCH_AFTER is true if returning the result of the operation. | |
6484 | FETCH_AFTER is false if returning the value before the operation. | |
6485 | IGNORE is true if the result is not used. | |
6486 | EXT_CALL is the correct builtin for an external call if this cannot be | |
6487 | resolved to an instruction sequence. */ | |
6488 | ||
6489 | static rtx | |
3754d046 | 6490 | expand_builtin_atomic_fetch_op (machine_mode mode, tree exp, rtx target, |
1cd6e20d | 6491 | enum rtx_code code, bool fetch_after, |
6492 | bool ignore, enum built_in_function ext_call) | |
6493 | { | |
6494 | rtx val, mem, ret; | |
6495 | enum memmodel model; | |
6496 | tree fndecl; | |
6497 | tree addr; | |
6498 | ||
6499 | model = get_memmodel (CALL_EXPR_ARG (exp, 2)); | |
6500 | ||
6501 | /* Expand the operands. */ | |
6502 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
6503 | val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); | |
6504 | ||
6505 | /* Only try generating instructions if inlining is turned on. */ | |
6506 | if (flag_inline_atomics) | |
6507 | { | |
6508 | ret = expand_atomic_fetch_op (target, mem, val, code, model, fetch_after); | |
6509 | if (ret) | |
6510 | return ret; | |
6511 | } | |
6512 | ||
6513 | /* Return if a different routine isn't needed for the library call. */ | |
6514 | if (ext_call == BUILT_IN_NONE) | |
6515 | return NULL_RTX; | |
6516 | ||
6517 | /* Change the call to the specified function. */ | |
6518 | fndecl = get_callee_fndecl (exp); | |
6519 | addr = CALL_EXPR_FN (exp); | |
6520 | STRIP_NOPS (addr); | |
6521 | ||
6522 | gcc_assert (TREE_OPERAND (addr, 0) == fndecl); | |
9af5ce0c | 6523 | TREE_OPERAND (addr, 0) = builtin_decl_explicit (ext_call); |
1cd6e20d | 6524 | |
a2f95d97 | 6525 | /* If we will emit code after the call, the call can not be a tail call. |
6526 | If it is emitted as a tail call, a barrier is emitted after it, and | |
6527 | then all trailing code is removed. */ | |
6528 | if (!ignore) | |
6529 | CALL_EXPR_TAILCALL (exp) = 0; | |
6530 | ||
1cd6e20d | 6531 | /* Expand the call here so we can emit trailing code. */ |
6532 | ret = expand_call (exp, target, ignore); | |
6533 | ||
6534 | /* Replace the original function just in case it matters. */ | |
6535 | TREE_OPERAND (addr, 0) = fndecl; | |
6536 | ||
6537 | /* Then issue the arithmetic correction to return the right result. */ | |
6538 | if (!ignore) | |
c449f851 | 6539 | { |
6540 | if (code == NOT) | |
6541 | { | |
6542 | ret = expand_simple_binop (mode, AND, ret, val, NULL_RTX, true, | |
6543 | OPTAB_LIB_WIDEN); | |
6544 | ret = expand_simple_unop (mode, NOT, ret, target, true); | |
6545 | } | |
6546 | else | |
6547 | ret = expand_simple_binop (mode, code, ret, val, target, true, | |
6548 | OPTAB_LIB_WIDEN); | |
6549 | } | |
1cd6e20d | 6550 | return ret; |
6551 | } | |
6552 | ||
9c1a31e4 | 6553 | /* Expand IFN_ATOMIC_BIT_TEST_AND_* internal function. */ |
6554 | ||
6555 | void | |
6556 | expand_ifn_atomic_bit_test_and (gcall *call) | |
6557 | { | |
6558 | tree ptr = gimple_call_arg (call, 0); | |
6559 | tree bit = gimple_call_arg (call, 1); | |
6560 | tree flag = gimple_call_arg (call, 2); | |
6561 | tree lhs = gimple_call_lhs (call); | |
6562 | enum memmodel model = MEMMODEL_SYNC_SEQ_CST; | |
6563 | machine_mode mode = TYPE_MODE (TREE_TYPE (flag)); | |
6564 | enum rtx_code code; | |
6565 | optab optab; | |
6566 | struct expand_operand ops[5]; | |
6567 | ||
6568 | gcc_assert (flag_inline_atomics); | |
6569 | ||
6570 | if (gimple_call_num_args (call) == 4) | |
6571 | model = get_memmodel (gimple_call_arg (call, 3)); | |
6572 | ||
6573 | rtx mem = get_builtin_sync_mem (ptr, mode); | |
6574 | rtx val = expand_expr_force_mode (bit, mode); | |
6575 | ||
6576 | switch (gimple_call_internal_fn (call)) | |
6577 | { | |
6578 | case IFN_ATOMIC_BIT_TEST_AND_SET: | |
6579 | code = IOR; | |
6580 | optab = atomic_bit_test_and_set_optab; | |
6581 | break; | |
6582 | case IFN_ATOMIC_BIT_TEST_AND_COMPLEMENT: | |
6583 | code = XOR; | |
6584 | optab = atomic_bit_test_and_complement_optab; | |
6585 | break; | |
6586 | case IFN_ATOMIC_BIT_TEST_AND_RESET: | |
6587 | code = AND; | |
6588 | optab = atomic_bit_test_and_reset_optab; | |
6589 | break; | |
6590 | default: | |
6591 | gcc_unreachable (); | |
6592 | } | |
6593 | ||
6594 | if (lhs == NULL_TREE) | |
6595 | { | |
6596 | val = expand_simple_binop (mode, ASHIFT, const1_rtx, | |
6597 | val, NULL_RTX, true, OPTAB_DIRECT); | |
6598 | if (code == AND) | |
6599 | val = expand_simple_unop (mode, NOT, val, NULL_RTX, true); | |
6600 | expand_atomic_fetch_op (const0_rtx, mem, val, code, model, false); | |
6601 | return; | |
6602 | } | |
6603 | ||
6604 | rtx target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE); | |
6605 | enum insn_code icode = direct_optab_handler (optab, mode); | |
6606 | gcc_assert (icode != CODE_FOR_nothing); | |
6607 | create_output_operand (&ops[0], target, mode); | |
6608 | create_fixed_operand (&ops[1], mem); | |
6609 | create_convert_operand_to (&ops[2], val, mode, true); | |
6610 | create_integer_operand (&ops[3], model); | |
6611 | create_integer_operand (&ops[4], integer_onep (flag)); | |
6612 | if (maybe_expand_insn (icode, 5, ops)) | |
6613 | return; | |
6614 | ||
6615 | rtx bitval = val; | |
6616 | val = expand_simple_binop (mode, ASHIFT, const1_rtx, | |
6617 | val, NULL_RTX, true, OPTAB_DIRECT); | |
6618 | rtx maskval = val; | |
6619 | if (code == AND) | |
6620 | val = expand_simple_unop (mode, NOT, val, NULL_RTX, true); | |
6621 | rtx result = expand_atomic_fetch_op (gen_reg_rtx (mode), mem, val, | |
6622 | code, model, false); | |
6623 | if (integer_onep (flag)) | |
6624 | { | |
6625 | result = expand_simple_binop (mode, ASHIFTRT, result, bitval, | |
6626 | NULL_RTX, true, OPTAB_DIRECT); | |
6627 | result = expand_simple_binop (mode, AND, result, const1_rtx, target, | |
6628 | true, OPTAB_DIRECT); | |
6629 | } | |
6630 | else | |
6631 | result = expand_simple_binop (mode, AND, result, maskval, target, true, | |
6632 | OPTAB_DIRECT); | |
6633 | if (result != target) | |
6634 | emit_move_insn (target, result); | |
6635 | } | |
6636 | ||
10b744a3 | 6637 | /* Expand an atomic clear operation. |
6638 | void _atomic_clear (BOOL *obj, enum memmodel) | |
6639 | EXP is the call expression. */ | |
6640 | ||
6641 | static rtx | |
6642 | expand_builtin_atomic_clear (tree exp) | |
6643 | { | |
3754d046 | 6644 | machine_mode mode; |
10b744a3 | 6645 | rtx mem, ret; |
6646 | enum memmodel model; | |
6647 | ||
517be012 | 6648 | mode = int_mode_for_size (BOOL_TYPE_SIZE, 0).require (); |
10b744a3 | 6649 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); |
6650 | model = get_memmodel (CALL_EXPR_ARG (exp, 1)); | |
6651 | ||
a372f7ca | 6652 | if (is_mm_consume (model) || is_mm_acquire (model) || is_mm_acq_rel (model)) |
10b744a3 | 6653 | { |
2cb724f9 | 6654 | source_location loc |
6655 | = expansion_point_location_if_in_system_header (input_location); | |
6656 | warning_at (loc, OPT_Winvalid_memory_model, | |
6657 | "invalid memory model for %<__atomic_store%>"); | |
086f4e33 | 6658 | model = MEMMODEL_SEQ_CST; |
10b744a3 | 6659 | } |
6660 | ||
6661 | /* Try issuing an __atomic_store, and allow fallback to __sync_lock_release. | |
6662 | Failing that, a store is issued by __atomic_store. The only way this can | |
6663 | fail is if the bool type is larger than a word size. Unlikely, but | |
6664 | handle it anyway for completeness. Assume a single threaded model since | |
6665 | there is no atomic support in this case, and no barriers are required. */ | |
6666 | ret = expand_atomic_store (mem, const0_rtx, model, true); | |
6667 | if (!ret) | |
6668 | emit_move_insn (mem, const0_rtx); | |
6669 | return const0_rtx; | |
6670 | } | |
6671 | ||
6672 | /* Expand an atomic test_and_set operation. | |
6673 | bool _atomic_test_and_set (BOOL *obj, enum memmodel) | |
6674 | EXP is the call expression. */ | |
6675 | ||
6676 | static rtx | |
7821cde1 | 6677 | expand_builtin_atomic_test_and_set (tree exp, rtx target) |
10b744a3 | 6678 | { |
7821cde1 | 6679 | rtx mem; |
10b744a3 | 6680 | enum memmodel model; |
3754d046 | 6681 | machine_mode mode; |
10b744a3 | 6682 | |
517be012 | 6683 | mode = int_mode_for_size (BOOL_TYPE_SIZE, 0).require (); |
10b744a3 | 6684 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); |
6685 | model = get_memmodel (CALL_EXPR_ARG (exp, 1)); | |
6686 | ||
7821cde1 | 6687 | return expand_atomic_test_and_set (target, mem, model); |
10b744a3 | 6688 | } |
6689 | ||
6690 | ||
1cd6e20d | 6691 | /* Return true if (optional) argument ARG1 of size ARG0 is always lock free on |
6692 | this architecture. If ARG1 is NULL, use typical alignment for size ARG0. */ | |
6693 | ||
6694 | static tree | |
6695 | fold_builtin_atomic_always_lock_free (tree arg0, tree arg1) | |
6696 | { | |
6697 | int size; | |
3754d046 | 6698 | machine_mode mode; |
1cd6e20d | 6699 | unsigned int mode_align, type_align; |
6700 | ||
6701 | if (TREE_CODE (arg0) != INTEGER_CST) | |
6702 | return NULL_TREE; | |
b6a5fc45 | 6703 | |
517be012 | 6704 | /* We need a corresponding integer mode for the access to be lock-free. */ |
1cd6e20d | 6705 | size = INTVAL (expand_normal (arg0)) * BITS_PER_UNIT; |
517be012 | 6706 | if (!int_mode_for_size (size, 0).exists (&mode)) |
6707 | return boolean_false_node; | |
6708 | ||
1cd6e20d | 6709 | mode_align = GET_MODE_ALIGNMENT (mode); |
6710 | ||
4ca99588 | 6711 | if (TREE_CODE (arg1) == INTEGER_CST) |
6712 | { | |
6713 | unsigned HOST_WIDE_INT val = UINTVAL (expand_normal (arg1)); | |
6714 | ||
6715 | /* Either this argument is null, or it's a fake pointer encoding | |
6716 | the alignment of the object. */ | |
ac29ece2 | 6717 | val = least_bit_hwi (val); |
4ca99588 | 6718 | val *= BITS_PER_UNIT; |
6719 | ||
6720 | if (val == 0 || mode_align < val) | |
6721 | type_align = mode_align; | |
6722 | else | |
6723 | type_align = val; | |
6724 | } | |
1cd6e20d | 6725 | else |
6726 | { | |
6727 | tree ttype = TREE_TYPE (arg1); | |
6728 | ||
6729 | /* This function is usually invoked and folded immediately by the front | |
6730 | end before anything else has a chance to look at it. The pointer | |
6731 | parameter at this point is usually cast to a void *, so check for that | |
6732 | and look past the cast. */ | |
2f8a2ead | 6733 | if (CONVERT_EXPR_P (arg1) |
6734 | && POINTER_TYPE_P (ttype) | |
6735 | && VOID_TYPE_P (TREE_TYPE (ttype)) | |
6736 | && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (arg1, 0)))) | |
1cd6e20d | 6737 | arg1 = TREE_OPERAND (arg1, 0); |
6738 | ||
6739 | ttype = TREE_TYPE (arg1); | |
6740 | gcc_assert (POINTER_TYPE_P (ttype)); | |
6741 | ||
6742 | /* Get the underlying type of the object. */ | |
6743 | ttype = TREE_TYPE (ttype); | |
6744 | type_align = TYPE_ALIGN (ttype); | |
6745 | } | |
6746 | ||
47ae02b7 | 6747 | /* If the object has smaller alignment, the lock free routines cannot |
1cd6e20d | 6748 | be used. */ |
6749 | if (type_align < mode_align) | |
06308d2a | 6750 | return boolean_false_node; |
1cd6e20d | 6751 | |
6752 | /* Check if a compare_and_swap pattern exists for the mode which represents | |
6753 | the required size. The pattern is not allowed to fail, so the existence | |
d5f5fa27 | 6754 | of the pattern indicates support is present. Also require that an |
6755 | atomic load exists for the required size. */ | |
6756 | if (can_compare_and_swap_p (mode, true) && can_atomic_load_p (mode)) | |
06308d2a | 6757 | return boolean_true_node; |
1cd6e20d | 6758 | else |
06308d2a | 6759 | return boolean_false_node; |
1cd6e20d | 6760 | } |
6761 | ||
6762 | /* Return true if the parameters to call EXP represent an object which will | |
6763 | always generate lock free instructions. The first argument represents the | |
6764 | size of the object, and the second parameter is a pointer to the object | |
6765 | itself. If NULL is passed for the object, then the result is based on | |
6766 | typical alignment for an object of the specified size. Otherwise return | |
6767 | false. */ | |
6768 | ||
6769 | static rtx | |
6770 | expand_builtin_atomic_always_lock_free (tree exp) | |
6771 | { | |
6772 | tree size; | |
6773 | tree arg0 = CALL_EXPR_ARG (exp, 0); | |
6774 | tree arg1 = CALL_EXPR_ARG (exp, 1); | |
6775 | ||
6776 | if (TREE_CODE (arg0) != INTEGER_CST) | |
6777 | { | |
6778 | error ("non-constant argument 1 to __atomic_always_lock_free"); | |
6779 | return const0_rtx; | |
6780 | } | |
6781 | ||
6782 | size = fold_builtin_atomic_always_lock_free (arg0, arg1); | |
06308d2a | 6783 | if (size == boolean_true_node) |
1cd6e20d | 6784 | return const1_rtx; |
6785 | return const0_rtx; | |
6786 | } | |
6787 | ||
6788 | /* Return a one or zero if it can be determined that object ARG1 of size ARG | |
6789 | is lock free on this architecture. */ | |
6790 | ||
6791 | static tree | |
6792 | fold_builtin_atomic_is_lock_free (tree arg0, tree arg1) | |
6793 | { | |
6794 | if (!flag_inline_atomics) | |
6795 | return NULL_TREE; | |
6796 | ||
6797 | /* If it isn't always lock free, don't generate a result. */ | |
06308d2a | 6798 | if (fold_builtin_atomic_always_lock_free (arg0, arg1) == boolean_true_node) |
6799 | return boolean_true_node; | |
1cd6e20d | 6800 | |
6801 | return NULL_TREE; | |
6802 | } | |
6803 | ||
6804 | /* Return true if the parameters to call EXP represent an object which will | |
6805 | always generate lock free instructions. The first argument represents the | |
6806 | size of the object, and the second parameter is a pointer to the object | |
6807 | itself. If NULL is passed for the object, then the result is based on | |
6808 | typical alignment for an object of the specified size. Otherwise return | |
6809 | NULL*/ | |
6810 | ||
6811 | static rtx | |
6812 | expand_builtin_atomic_is_lock_free (tree exp) | |
6813 | { | |
6814 | tree size; | |
6815 | tree arg0 = CALL_EXPR_ARG (exp, 0); | |
6816 | tree arg1 = CALL_EXPR_ARG (exp, 1); | |
6817 | ||
6818 | if (!INTEGRAL_TYPE_P (TREE_TYPE (arg0))) | |
6819 | { | |
6820 | error ("non-integer argument 1 to __atomic_is_lock_free"); | |
6821 | return NULL_RTX; | |
6822 | } | |
6823 | ||
6824 | if (!flag_inline_atomics) | |
6825 | return NULL_RTX; | |
6826 | ||
6827 | /* If the value is known at compile time, return the RTX for it. */ | |
6828 | size = fold_builtin_atomic_is_lock_free (arg0, arg1); | |
06308d2a | 6829 | if (size == boolean_true_node) |
1cd6e20d | 6830 | return const1_rtx; |
6831 | ||
6832 | return NULL_RTX; | |
6833 | } | |
6834 | ||
1cd6e20d | 6835 | /* Expand the __atomic_thread_fence intrinsic: |
6836 | void __atomic_thread_fence (enum memmodel) | |
6837 | EXP is the CALL_EXPR. */ | |
6838 | ||
6839 | static void | |
6840 | expand_builtin_atomic_thread_fence (tree exp) | |
6841 | { | |
fe54c06b | 6842 | enum memmodel model = get_memmodel (CALL_EXPR_ARG (exp, 0)); |
6843 | expand_mem_thread_fence (model); | |
1cd6e20d | 6844 | } |
6845 | ||
6846 | /* Expand the __atomic_signal_fence intrinsic: | |
6847 | void __atomic_signal_fence (enum memmodel) | |
6848 | EXP is the CALL_EXPR. */ | |
6849 | ||
6850 | static void | |
6851 | expand_builtin_atomic_signal_fence (tree exp) | |
6852 | { | |
fe54c06b | 6853 | enum memmodel model = get_memmodel (CALL_EXPR_ARG (exp, 0)); |
6854 | expand_mem_signal_fence (model); | |
b6a5fc45 | 6855 | } |
6856 | ||
6857 | /* Expand the __sync_synchronize intrinsic. */ | |
6858 | ||
6859 | static void | |
2797f13a | 6860 | expand_builtin_sync_synchronize (void) |
b6a5fc45 | 6861 | { |
a372f7ca | 6862 | expand_mem_thread_fence (MEMMODEL_SYNC_SEQ_CST); |
b6a5fc45 | 6863 | } |
6864 | ||
badaa04c | 6865 | static rtx |
6866 | expand_builtin_thread_pointer (tree exp, rtx target) | |
6867 | { | |
6868 | enum insn_code icode; | |
6869 | if (!validate_arglist (exp, VOID_TYPE)) | |
6870 | return const0_rtx; | |
6871 | icode = direct_optab_handler (get_thread_pointer_optab, Pmode); | |
6872 | if (icode != CODE_FOR_nothing) | |
6873 | { | |
6874 | struct expand_operand op; | |
3ed779c3 | 6875 | /* If the target is not sutitable then create a new target. */ |
6876 | if (target == NULL_RTX | |
6877 | || !REG_P (target) | |
6878 | || GET_MODE (target) != Pmode) | |
badaa04c | 6879 | target = gen_reg_rtx (Pmode); |
6880 | create_output_operand (&op, target, Pmode); | |
6881 | expand_insn (icode, 1, &op); | |
6882 | return target; | |
6883 | } | |
6884 | error ("__builtin_thread_pointer is not supported on this target"); | |
6885 | return const0_rtx; | |
6886 | } | |
6887 | ||
6888 | static void | |
6889 | expand_builtin_set_thread_pointer (tree exp) | |
6890 | { | |
6891 | enum insn_code icode; | |
6892 | if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) | |
6893 | return; | |
6894 | icode = direct_optab_handler (set_thread_pointer_optab, Pmode); | |
6895 | if (icode != CODE_FOR_nothing) | |
6896 | { | |
6897 | struct expand_operand op; | |
6898 | rtx val = expand_expr (CALL_EXPR_ARG (exp, 0), NULL_RTX, | |
6899 | Pmode, EXPAND_NORMAL); | |
6f343c10 | 6900 | create_input_operand (&op, val, Pmode); |
badaa04c | 6901 | expand_insn (icode, 1, &op); |
6902 | return; | |
6903 | } | |
6904 | error ("__builtin_set_thread_pointer is not supported on this target"); | |
6905 | } | |
6906 | ||
53800dbe | 6907 | \f |
0e80b01d | 6908 | /* Emit code to restore the current value of stack. */ |
6909 | ||
6910 | static void | |
6911 | expand_stack_restore (tree var) | |
6912 | { | |
1e0c0b35 | 6913 | rtx_insn *prev; |
6914 | rtx sa = expand_normal (var); | |
0e80b01d | 6915 | |
6916 | sa = convert_memory_address (Pmode, sa); | |
6917 | ||
6918 | prev = get_last_insn (); | |
6919 | emit_stack_restore (SAVE_BLOCK, sa); | |
97354ae4 | 6920 | |
6921 | record_new_stack_level (); | |
6922 | ||
0e80b01d | 6923 | fixup_args_size_notes (prev, get_last_insn (), 0); |
6924 | } | |
6925 | ||
0e80b01d | 6926 | /* Emit code to save the current value of stack. */ |
6927 | ||
6928 | static rtx | |
6929 | expand_stack_save (void) | |
6930 | { | |
6931 | rtx ret = NULL_RTX; | |
6932 | ||
0e80b01d | 6933 | emit_stack_save (SAVE_BLOCK, &ret); |
6934 | return ret; | |
6935 | } | |
6936 | ||
a7babc1e | 6937 | /* Emit code to get the openacc gang, worker or vector id or size. */ |
6938 | ||
6939 | static rtx | |
6940 | expand_builtin_goacc_parlevel_id_size (tree exp, rtx target, int ignore) | |
6941 | { | |
6942 | const char *name; | |
6943 | rtx fallback_retval; | |
6944 | rtx_insn *(*gen_fn) (rtx, rtx); | |
6945 | switch (DECL_FUNCTION_CODE (get_callee_fndecl (exp))) | |
6946 | { | |
6947 | case BUILT_IN_GOACC_PARLEVEL_ID: | |
6948 | name = "__builtin_goacc_parlevel_id"; | |
6949 | fallback_retval = const0_rtx; | |
6950 | gen_fn = targetm.gen_oacc_dim_pos; | |
6951 | break; | |
6952 | case BUILT_IN_GOACC_PARLEVEL_SIZE: | |
6953 | name = "__builtin_goacc_parlevel_size"; | |
6954 | fallback_retval = const1_rtx; | |
6955 | gen_fn = targetm.gen_oacc_dim_size; | |
6956 | break; | |
6957 | default: | |
6958 | gcc_unreachable (); | |
6959 | } | |
6960 | ||
6961 | if (oacc_get_fn_attrib (current_function_decl) == NULL_TREE) | |
6962 | { | |
6963 | error ("%qs only supported in OpenACC code", name); | |
6964 | return const0_rtx; | |
6965 | } | |
6966 | ||
6967 | tree arg = CALL_EXPR_ARG (exp, 0); | |
6968 | if (TREE_CODE (arg) != INTEGER_CST) | |
6969 | { | |
6970 | error ("non-constant argument 0 to %qs", name); | |
6971 | return const0_rtx; | |
6972 | } | |
6973 | ||
6974 | int dim = TREE_INT_CST_LOW (arg); | |
6975 | switch (dim) | |
6976 | { | |
6977 | case GOMP_DIM_GANG: | |
6978 | case GOMP_DIM_WORKER: | |
6979 | case GOMP_DIM_VECTOR: | |
6980 | break; | |
6981 | default: | |
6982 | error ("illegal argument 0 to %qs", name); | |
6983 | return const0_rtx; | |
6984 | } | |
6985 | ||
6986 | if (ignore) | |
6987 | return target; | |
6988 | ||
2b895374 | 6989 | if (target == NULL_RTX) |
6990 | target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp))); | |
6991 | ||
a7babc1e | 6992 | if (!targetm.have_oacc_dim_size ()) |
6993 | { | |
6994 | emit_move_insn (target, fallback_retval); | |
6995 | return target; | |
6996 | } | |
6997 | ||
6998 | rtx reg = MEM_P (target) ? gen_reg_rtx (GET_MODE (target)) : target; | |
6999 | emit_insn (gen_fn (reg, GEN_INT (dim))); | |
7000 | if (reg != target) | |
7001 | emit_move_insn (target, reg); | |
7002 | ||
7003 | return target; | |
7004 | } | |
ca4c3545 | 7005 | |
b3e6ae76 | 7006 | /* Expand a string compare operation using a sequence of char comparison |
a950155e | 7007 | to get rid of the calling overhead, with result going to TARGET if |
7008 | that's convenient. | |
7009 | ||
7010 | VAR_STR is the variable string source; | |
7011 | CONST_STR is the constant string source; | |
7012 | LENGTH is the number of chars to compare; | |
7013 | CONST_STR_N indicates which source string is the constant string; | |
7014 | IS_MEMCMP indicates whether it's a memcmp or strcmp. | |
b3e6ae76 | 7015 | |
a950155e | 7016 | to: (assume const_str_n is 2, i.e., arg2 is a constant string) |
7017 | ||
0dbefa15 | 7018 | target = (int) (unsigned char) var_str[0] |
7019 | - (int) (unsigned char) const_str[0]; | |
a950155e | 7020 | if (target != 0) |
7021 | goto ne_label; | |
7022 | ... | |
0dbefa15 | 7023 | target = (int) (unsigned char) var_str[length - 2] |
7024 | - (int) (unsigned char) const_str[length - 2]; | |
a950155e | 7025 | if (target != 0) |
7026 | goto ne_label; | |
0dbefa15 | 7027 | target = (int) (unsigned char) var_str[length - 1] |
7028 | - (int) (unsigned char) const_str[length - 1]; | |
a950155e | 7029 | ne_label: |
7030 | */ | |
7031 | ||
7032 | static rtx | |
b3e6ae76 | 7033 | inline_string_cmp (rtx target, tree var_str, const char *const_str, |
a950155e | 7034 | unsigned HOST_WIDE_INT length, |
0dbefa15 | 7035 | int const_str_n, machine_mode mode) |
a950155e | 7036 | { |
7037 | HOST_WIDE_INT offset = 0; | |
b3e6ae76 | 7038 | rtx var_rtx_array |
a950155e | 7039 | = get_memory_rtx (var_str, build_int_cst (unsigned_type_node,length)); |
7040 | rtx var_rtx = NULL_RTX; | |
b3e6ae76 | 7041 | rtx const_rtx = NULL_RTX; |
7042 | rtx result = target ? target : gen_reg_rtx (mode); | |
7043 | rtx_code_label *ne_label = gen_label_rtx (); | |
0dbefa15 | 7044 | tree unit_type_node = unsigned_char_type_node; |
b3e6ae76 | 7045 | scalar_int_mode unit_mode |
7046 | = as_a <scalar_int_mode> TYPE_MODE (unit_type_node); | |
a950155e | 7047 | |
7048 | start_sequence (); | |
7049 | ||
7050 | for (unsigned HOST_WIDE_INT i = 0; i < length; i++) | |
7051 | { | |
b3e6ae76 | 7052 | var_rtx |
a950155e | 7053 | = adjust_address (var_rtx_array, TYPE_MODE (unit_type_node), offset); |
b3e6ae76 | 7054 | const_rtx = c_readstr (const_str + offset, unit_mode); |
a950155e | 7055 | rtx op0 = (const_str_n == 1) ? const_rtx : var_rtx; |
7056 | rtx op1 = (const_str_n == 1) ? var_rtx : const_rtx; | |
b3e6ae76 | 7057 | |
0dbefa15 | 7058 | op0 = convert_modes (mode, unit_mode, op0, 1); |
7059 | op1 = convert_modes (mode, unit_mode, op1, 1); | |
b3e6ae76 | 7060 | result = expand_simple_binop (mode, MINUS, op0, op1, |
0dbefa15 | 7061 | result, 1, OPTAB_WIDEN); |
b3e6ae76 | 7062 | if (i < length - 1) |
7063 | emit_cmp_and_jump_insns (result, CONST0_RTX (mode), NE, NULL_RTX, | |
7064 | mode, true, ne_label); | |
7065 | offset += GET_MODE_SIZE (unit_mode); | |
a950155e | 7066 | } |
7067 | ||
7068 | emit_label (ne_label); | |
7069 | rtx_insn *insns = get_insns (); | |
7070 | end_sequence (); | |
7071 | emit_insn (insns); | |
7072 | ||
7073 | return result; | |
7074 | } | |
7075 | ||
b3e6ae76 | 7076 | /* Inline expansion a call to str(n)cmp, with result going to |
a950155e | 7077 | TARGET if that's convenient. |
7078 | If the call is not been inlined, return NULL_RTX. */ | |
7079 | static rtx | |
0dbefa15 | 7080 | inline_expand_builtin_string_cmp (tree exp, rtx target) |
a950155e | 7081 | { |
7082 | tree fndecl = get_callee_fndecl (exp); | |
7083 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
7084 | unsigned HOST_WIDE_INT length = 0; | |
7085 | bool is_ncmp = (fcode == BUILT_IN_STRNCMP || fcode == BUILT_IN_MEMCMP); | |
7086 | ||
9c7661c8 | 7087 | /* Do NOT apply this inlining expansion when optimizing for size or |
7088 | optimization level below 2. */ | |
7089 | if (optimize < 2 || optimize_insn_for_size_p ()) | |
7090 | return NULL_RTX; | |
7091 | ||
a950155e | 7092 | gcc_checking_assert (fcode == BUILT_IN_STRCMP |
b3e6ae76 | 7093 | || fcode == BUILT_IN_STRNCMP |
a950155e | 7094 | || fcode == BUILT_IN_MEMCMP); |
7095 | ||
0dbefa15 | 7096 | /* On a target where the type of the call (int) has same or narrower presicion |
7097 | than unsigned char, give up the inlining expansion. */ | |
7098 | if (TYPE_PRECISION (unsigned_char_type_node) | |
7099 | >= TYPE_PRECISION (TREE_TYPE (exp))) | |
7100 | return NULL_RTX; | |
7101 | ||
a950155e | 7102 | tree arg1 = CALL_EXPR_ARG (exp, 0); |
7103 | tree arg2 = CALL_EXPR_ARG (exp, 1); | |
7104 | tree len3_tree = is_ncmp ? CALL_EXPR_ARG (exp, 2) : NULL_TREE; | |
7105 | ||
7106 | unsigned HOST_WIDE_INT len1 = 0; | |
7107 | unsigned HOST_WIDE_INT len2 = 0; | |
7108 | unsigned HOST_WIDE_INT len3 = 0; | |
7109 | ||
7110 | const char *src_str1 = c_getstr (arg1, &len1); | |
7111 | const char *src_str2 = c_getstr (arg2, &len2); | |
b3e6ae76 | 7112 | |
a950155e | 7113 | /* If neither strings is constant string, the call is not qualify. */ |
7114 | if (!src_str1 && !src_str2) | |
7115 | return NULL_RTX; | |
7116 | ||
7117 | /* For strncmp, if the length is not a const, not qualify. */ | |
7118 | if (is_ncmp && !tree_fits_uhwi_p (len3_tree)) | |
7119 | return NULL_RTX; | |
7120 | ||
7121 | int const_str_n = 0; | |
7122 | if (!len1) | |
7123 | const_str_n = 2; | |
7124 | else if (!len2) | |
7125 | const_str_n = 1; | |
7126 | else if (len2 > len1) | |
7127 | const_str_n = 1; | |
7128 | else | |
7129 | const_str_n = 2; | |
7130 | ||
7131 | gcc_checking_assert (const_str_n > 0); | |
7132 | length = (const_str_n == 1) ? len1 : len2; | |
7133 | ||
7134 | if (is_ncmp && (len3 = tree_to_uhwi (len3_tree)) < length) | |
7135 | length = len3; | |
7136 | ||
b3e6ae76 | 7137 | /* If the length of the comparision is larger than the threshold, |
a950155e | 7138 | do nothing. */ |
b3e6ae76 | 7139 | if (length > (unsigned HOST_WIDE_INT) |
a950155e | 7140 | PARAM_VALUE (BUILTIN_STRING_CMP_INLINE_LENGTH)) |
7141 | return NULL_RTX; | |
7142 | ||
7143 | machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); | |
7144 | ||
7145 | /* Now, start inline expansion the call. */ | |
b3e6ae76 | 7146 | return inline_string_cmp (target, (const_str_n == 1) ? arg2 : arg1, |
a950155e | 7147 | (const_str_n == 1) ? src_str1 : src_str2, length, |
0dbefa15 | 7148 | const_str_n, mode); |
a950155e | 7149 | } |
7150 | ||
123081ef | 7151 | /* Expand a call to __builtin_speculation_safe_value_<N>. MODE |
7152 | represents the size of the first argument to that call, or VOIDmode | |
7153 | if the argument is a pointer. IGNORE will be true if the result | |
7154 | isn't used. */ | |
7155 | static rtx | |
7156 | expand_speculation_safe_value (machine_mode mode, tree exp, rtx target, | |
7157 | bool ignore) | |
7158 | { | |
7159 | rtx val, failsafe; | |
7160 | unsigned nargs = call_expr_nargs (exp); | |
7161 | ||
7162 | tree arg0 = CALL_EXPR_ARG (exp, 0); | |
7163 | ||
7164 | if (mode == VOIDmode) | |
7165 | { | |
7166 | mode = TYPE_MODE (TREE_TYPE (arg0)); | |
7167 | gcc_assert (GET_MODE_CLASS (mode) == MODE_INT); | |
7168 | } | |
7169 | ||
7170 | val = expand_expr (arg0, NULL_RTX, mode, EXPAND_NORMAL); | |
7171 | ||
7172 | /* An optional second argument can be used as a failsafe value on | |
7173 | some machines. If it isn't present, then the failsafe value is | |
7174 | assumed to be 0. */ | |
7175 | if (nargs > 1) | |
7176 | { | |
7177 | tree arg1 = CALL_EXPR_ARG (exp, 1); | |
7178 | failsafe = expand_expr (arg1, NULL_RTX, mode, EXPAND_NORMAL); | |
7179 | } | |
7180 | else | |
7181 | failsafe = const0_rtx; | |
7182 | ||
7183 | /* If the result isn't used, the behavior is undefined. It would be | |
7184 | nice to emit a warning here, but path splitting means this might | |
7185 | happen with legitimate code. So simply drop the builtin | |
7186 | expansion in that case; we've handled any side-effects above. */ | |
7187 | if (ignore) | |
7188 | return const0_rtx; | |
7189 | ||
7190 | /* If we don't have a suitable target, create one to hold the result. */ | |
7191 | if (target == NULL || GET_MODE (target) != mode) | |
7192 | target = gen_reg_rtx (mode); | |
7193 | ||
7194 | if (GET_MODE (val) != mode && GET_MODE (val) != VOIDmode) | |
7195 | val = convert_modes (mode, VOIDmode, val, false); | |
7196 | ||
7197 | return targetm.speculation_safe_value (mode, target, val, failsafe); | |
7198 | } | |
7199 | ||
53800dbe | 7200 | /* Expand an expression EXP that calls a built-in function, |
7201 | with result going to TARGET if that's convenient | |
7202 | (and in mode MODE if that's convenient). | |
7203 | SUBTARGET may be used as the target for computing one of EXP's operands. | |
7204 | IGNORE is nonzero if the value is to be ignored. */ | |
7205 | ||
7206 | rtx | |
3754d046 | 7207 | expand_builtin (tree exp, rtx target, rtx subtarget, machine_mode mode, |
aecda0d6 | 7208 | int ignore) |
53800dbe | 7209 | { |
c6e6ecb1 | 7210 | tree fndecl = get_callee_fndecl (exp); |
53800dbe | 7211 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); |
3754d046 | 7212 | machine_mode target_mode = TYPE_MODE (TREE_TYPE (exp)); |
67fa4078 | 7213 | int flags; |
53800dbe | 7214 | |
4e2f4ed5 | 7215 | if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD) |
7216 | return targetm.expand_builtin (exp, target, subtarget, mode, ignore); | |
7217 | ||
f9acf11a | 7218 | /* When ASan is enabled, we don't want to expand some memory/string |
7219 | builtins and rely on libsanitizer's hooks. This allows us to avoid | |
7220 | redundant checks and be sure, that possible overflow will be detected | |
7221 | by ASan. */ | |
7222 | ||
7223 | if ((flag_sanitize & SANITIZE_ADDRESS) && asan_intercepted_p (fcode)) | |
7224 | return expand_call (exp, target, ignore); | |
7225 | ||
53800dbe | 7226 | /* When not optimizing, generate calls to library functions for a certain |
7227 | set of builtins. */ | |
cd9ff771 | 7228 | if (!optimize |
b6a5fc45 | 7229 | && !called_as_built_in (fndecl) |
73037a1e | 7230 | && fcode != BUILT_IN_FORK |
7231 | && fcode != BUILT_IN_EXECL | |
7232 | && fcode != BUILT_IN_EXECV | |
7233 | && fcode != BUILT_IN_EXECLP | |
7234 | && fcode != BUILT_IN_EXECLE | |
7235 | && fcode != BUILT_IN_EXECVP | |
7236 | && fcode != BUILT_IN_EXECVE | |
2b34677f | 7237 | && !ALLOCA_FUNCTION_CODE_P (fcode) |
1e42d5c6 | 7238 | && fcode != BUILT_IN_FREE) |
cd9ff771 | 7239 | return expand_call (exp, target, ignore); |
53800dbe | 7240 | |
8d6d7930 | 7241 | /* The built-in function expanders test for target == const0_rtx |
7242 | to determine whether the function's result will be ignored. */ | |
7243 | if (ignore) | |
7244 | target = const0_rtx; | |
7245 | ||
7246 | /* If the result of a pure or const built-in function is ignored, and | |
7247 | none of its arguments are volatile, we can avoid expanding the | |
7248 | built-in call and just evaluate the arguments for side-effects. */ | |
7249 | if (target == const0_rtx | |
67fa4078 | 7250 | && ((flags = flags_from_decl_or_type (fndecl)) & (ECF_CONST | ECF_PURE)) |
7251 | && !(flags & ECF_LOOPING_CONST_OR_PURE)) | |
8d6d7930 | 7252 | { |
7253 | bool volatilep = false; | |
7254 | tree arg; | |
c2f47e15 | 7255 | call_expr_arg_iterator iter; |
8d6d7930 | 7256 | |
c2f47e15 | 7257 | FOR_EACH_CALL_EXPR_ARG (arg, iter, exp) |
7258 | if (TREE_THIS_VOLATILE (arg)) | |
8d6d7930 | 7259 | { |
7260 | volatilep = true; | |
7261 | break; | |
7262 | } | |
7263 | ||
7264 | if (! volatilep) | |
7265 | { | |
c2f47e15 | 7266 | FOR_EACH_CALL_EXPR_ARG (arg, iter, exp) |
7267 | expand_expr (arg, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
8d6d7930 | 7268 | return const0_rtx; |
7269 | } | |
7270 | } | |
7271 | ||
53800dbe | 7272 | switch (fcode) |
7273 | { | |
4f35b1fc | 7274 | CASE_FLT_FN (BUILT_IN_FABS): |
012f068a | 7275 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FABS): |
8aa32773 | 7276 | case BUILT_IN_FABSD32: |
7277 | case BUILT_IN_FABSD64: | |
7278 | case BUILT_IN_FABSD128: | |
c2f47e15 | 7279 | target = expand_builtin_fabs (exp, target, subtarget); |
78a74442 | 7280 | if (target) |
a0c938f0 | 7281 | return target; |
78a74442 | 7282 | break; |
7283 | ||
4f35b1fc | 7284 | CASE_FLT_FN (BUILT_IN_COPYSIGN): |
012f068a | 7285 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_COPYSIGN): |
c2f47e15 | 7286 | target = expand_builtin_copysign (exp, target, subtarget); |
270436f3 | 7287 | if (target) |
7288 | return target; | |
7289 | break; | |
7290 | ||
7d3f6cc7 | 7291 | /* Just do a normal library call if we were unable to fold |
7292 | the values. */ | |
4f35b1fc | 7293 | CASE_FLT_FN (BUILT_IN_CABS): |
78a74442 | 7294 | break; |
53800dbe | 7295 | |
7e0713b1 | 7296 | CASE_FLT_FN (BUILT_IN_FMA): |
8c32188e | 7297 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMA): |
7e0713b1 | 7298 | target = expand_builtin_mathfn_ternary (exp, target, subtarget); |
7299 | if (target) | |
7300 | return target; | |
7301 | break; | |
7302 | ||
a67a90e5 | 7303 | CASE_FLT_FN (BUILT_IN_ILOGB): |
7304 | if (! flag_unsafe_math_optimizations) | |
7305 | break; | |
12f08300 | 7306 | gcc_fallthrough (); |
7307 | CASE_FLT_FN (BUILT_IN_ISINF): | |
7308 | CASE_FLT_FN (BUILT_IN_FINITE): | |
7309 | case BUILT_IN_ISFINITE: | |
7310 | case BUILT_IN_ISNORMAL: | |
f97eea22 | 7311 | target = expand_builtin_interclass_mathfn (exp, target); |
a67a90e5 | 7312 | if (target) |
7313 | return target; | |
7314 | break; | |
7315 | ||
80ff6494 | 7316 | CASE_FLT_FN (BUILT_IN_ICEIL): |
4f35b1fc | 7317 | CASE_FLT_FN (BUILT_IN_LCEIL): |
7318 | CASE_FLT_FN (BUILT_IN_LLCEIL): | |
7319 | CASE_FLT_FN (BUILT_IN_LFLOOR): | |
80ff6494 | 7320 | CASE_FLT_FN (BUILT_IN_IFLOOR): |
4f35b1fc | 7321 | CASE_FLT_FN (BUILT_IN_LLFLOOR): |
ff1b14e4 | 7322 | target = expand_builtin_int_roundingfn (exp, target); |
ad52b9b7 | 7323 | if (target) |
7324 | return target; | |
7325 | break; | |
7326 | ||
80ff6494 | 7327 | CASE_FLT_FN (BUILT_IN_IRINT): |
7d3afc77 | 7328 | CASE_FLT_FN (BUILT_IN_LRINT): |
7329 | CASE_FLT_FN (BUILT_IN_LLRINT): | |
80ff6494 | 7330 | CASE_FLT_FN (BUILT_IN_IROUND): |
ef2f1a10 | 7331 | CASE_FLT_FN (BUILT_IN_LROUND): |
7332 | CASE_FLT_FN (BUILT_IN_LLROUND): | |
ff1b14e4 | 7333 | target = expand_builtin_int_roundingfn_2 (exp, target); |
7d3afc77 | 7334 | if (target) |
7335 | return target; | |
7336 | break; | |
7337 | ||
4f35b1fc | 7338 | CASE_FLT_FN (BUILT_IN_POWI): |
f97eea22 | 7339 | target = expand_builtin_powi (exp, target); |
757c219d | 7340 | if (target) |
7341 | return target; | |
7342 | break; | |
7343 | ||
d735c391 | 7344 | CASE_FLT_FN (BUILT_IN_CEXPI): |
f97eea22 | 7345 | target = expand_builtin_cexpi (exp, target); |
d735c391 | 7346 | gcc_assert (target); |
7347 | return target; | |
7348 | ||
4f35b1fc | 7349 | CASE_FLT_FN (BUILT_IN_SIN): |
7350 | CASE_FLT_FN (BUILT_IN_COS): | |
6b43bae4 | 7351 | if (! flag_unsafe_math_optimizations) |
7352 | break; | |
7353 | target = expand_builtin_mathfn_3 (exp, target, subtarget); | |
7354 | if (target) | |
7355 | return target; | |
7356 | break; | |
7357 | ||
c3147c1a | 7358 | CASE_FLT_FN (BUILT_IN_SINCOS): |
7359 | if (! flag_unsafe_math_optimizations) | |
7360 | break; | |
7361 | target = expand_builtin_sincos (exp); | |
7362 | if (target) | |
7363 | return target; | |
7364 | break; | |
7365 | ||
53800dbe | 7366 | case BUILT_IN_APPLY_ARGS: |
7367 | return expand_builtin_apply_args (); | |
7368 | ||
7369 | /* __builtin_apply (FUNCTION, ARGUMENTS, ARGSIZE) invokes | |
7370 | FUNCTION with a copy of the parameters described by | |
7371 | ARGUMENTS, and ARGSIZE. It returns a block of memory | |
7372 | allocated on the stack into which is stored all the registers | |
7373 | that might possibly be used for returning the result of a | |
7374 | function. ARGUMENTS is the value returned by | |
7375 | __builtin_apply_args. ARGSIZE is the number of bytes of | |
7376 | arguments that must be copied. ??? How should this value be | |
7377 | computed? We'll also need a safe worst case value for varargs | |
7378 | functions. */ | |
7379 | case BUILT_IN_APPLY: | |
c2f47e15 | 7380 | if (!validate_arglist (exp, POINTER_TYPE, |
0eb671f7 | 7381 | POINTER_TYPE, INTEGER_TYPE, VOID_TYPE) |
c2f47e15 | 7382 | && !validate_arglist (exp, REFERENCE_TYPE, |
0eb671f7 | 7383 | POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
53800dbe | 7384 | return const0_rtx; |
7385 | else | |
7386 | { | |
53800dbe | 7387 | rtx ops[3]; |
7388 | ||
c2f47e15 | 7389 | ops[0] = expand_normal (CALL_EXPR_ARG (exp, 0)); |
7390 | ops[1] = expand_normal (CALL_EXPR_ARG (exp, 1)); | |
7391 | ops[2] = expand_normal (CALL_EXPR_ARG (exp, 2)); | |
53800dbe | 7392 | |
7393 | return expand_builtin_apply (ops[0], ops[1], ops[2]); | |
7394 | } | |
7395 | ||
7396 | /* __builtin_return (RESULT) causes the function to return the | |
7397 | value described by RESULT. RESULT is address of the block of | |
7398 | memory returned by __builtin_apply. */ | |
7399 | case BUILT_IN_RETURN: | |
c2f47e15 | 7400 | if (validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) |
7401 | expand_builtin_return (expand_normal (CALL_EXPR_ARG (exp, 0))); | |
53800dbe | 7402 | return const0_rtx; |
7403 | ||
7404 | case BUILT_IN_SAVEREGS: | |
a66c9326 | 7405 | return expand_builtin_saveregs (); |
53800dbe | 7406 | |
48dc2227 | 7407 | case BUILT_IN_VA_ARG_PACK: |
7408 | /* All valid uses of __builtin_va_arg_pack () are removed during | |
7409 | inlining. */ | |
b8c23db3 | 7410 | error ("%Kinvalid use of %<__builtin_va_arg_pack ()%>", exp); |
48dc2227 | 7411 | return const0_rtx; |
7412 | ||
4e1d7ea4 | 7413 | case BUILT_IN_VA_ARG_PACK_LEN: |
7414 | /* All valid uses of __builtin_va_arg_pack_len () are removed during | |
7415 | inlining. */ | |
b8c23db3 | 7416 | error ("%Kinvalid use of %<__builtin_va_arg_pack_len ()%>", exp); |
4e1d7ea4 | 7417 | return const0_rtx; |
7418 | ||
53800dbe | 7419 | /* Return the address of the first anonymous stack arg. */ |
7420 | case BUILT_IN_NEXT_ARG: | |
c2f47e15 | 7421 | if (fold_builtin_next_arg (exp, false)) |
a0c938f0 | 7422 | return const0_rtx; |
79012a9d | 7423 | return expand_builtin_next_arg (); |
53800dbe | 7424 | |
ac8fb6db | 7425 | case BUILT_IN_CLEAR_CACHE: |
7426 | target = expand_builtin___clear_cache (exp); | |
7427 | if (target) | |
7428 | return target; | |
7429 | break; | |
7430 | ||
53800dbe | 7431 | case BUILT_IN_CLASSIFY_TYPE: |
c2f47e15 | 7432 | return expand_builtin_classify_type (exp); |
53800dbe | 7433 | |
7434 | case BUILT_IN_CONSTANT_P: | |
4ee9c684 | 7435 | return const0_rtx; |
53800dbe | 7436 | |
7437 | case BUILT_IN_FRAME_ADDRESS: | |
7438 | case BUILT_IN_RETURN_ADDRESS: | |
c2f47e15 | 7439 | return expand_builtin_frame_address (fndecl, exp); |
53800dbe | 7440 | |
7441 | /* Returns the address of the area where the structure is returned. | |
7442 | 0 otherwise. */ | |
7443 | case BUILT_IN_AGGREGATE_INCOMING_ADDRESS: | |
c2f47e15 | 7444 | if (call_expr_nargs (exp) != 0 |
9342ee68 | 7445 | || ! AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl))) |
e16ceb8e | 7446 | || !MEM_P (DECL_RTL (DECL_RESULT (current_function_decl)))) |
9342ee68 | 7447 | return const0_rtx; |
53800dbe | 7448 | else |
9342ee68 | 7449 | return XEXP (DECL_RTL (DECL_RESULT (current_function_decl)), 0); |
53800dbe | 7450 | |
2b34677f | 7451 | CASE_BUILT_IN_ALLOCA: |
2b29cc6a | 7452 | target = expand_builtin_alloca (exp); |
53800dbe | 7453 | if (target) |
7454 | return target; | |
7455 | break; | |
7456 | ||
d08919a7 | 7457 | case BUILT_IN_ASAN_ALLOCAS_UNPOISON: |
7458 | return expand_asan_emit_allocas_unpoison (exp); | |
7459 | ||
4ee9c684 | 7460 | case BUILT_IN_STACK_SAVE: |
7461 | return expand_stack_save (); | |
7462 | ||
7463 | case BUILT_IN_STACK_RESTORE: | |
c2f47e15 | 7464 | expand_stack_restore (CALL_EXPR_ARG (exp, 0)); |
4ee9c684 | 7465 | return const0_rtx; |
7466 | ||
74bdbe96 | 7467 | case BUILT_IN_BSWAP16: |
42791117 | 7468 | case BUILT_IN_BSWAP32: |
7469 | case BUILT_IN_BSWAP64: | |
74bdbe96 | 7470 | target = expand_builtin_bswap (target_mode, exp, target, subtarget); |
42791117 | 7471 | if (target) |
7472 | return target; | |
7473 | break; | |
7474 | ||
4f35b1fc | 7475 | CASE_INT_FN (BUILT_IN_FFS): |
c2f47e15 | 7476 | target = expand_builtin_unop (target_mode, exp, target, |
efb070c8 | 7477 | subtarget, ffs_optab); |
6a08d0ab | 7478 | if (target) |
7479 | return target; | |
7480 | break; | |
7481 | ||
4f35b1fc | 7482 | CASE_INT_FN (BUILT_IN_CLZ): |
c2f47e15 | 7483 | target = expand_builtin_unop (target_mode, exp, target, |
efb070c8 | 7484 | subtarget, clz_optab); |
6a08d0ab | 7485 | if (target) |
7486 | return target; | |
7487 | break; | |
7488 | ||
4f35b1fc | 7489 | CASE_INT_FN (BUILT_IN_CTZ): |
c2f47e15 | 7490 | target = expand_builtin_unop (target_mode, exp, target, |
efb070c8 | 7491 | subtarget, ctz_optab); |
6a08d0ab | 7492 | if (target) |
7493 | return target; | |
7494 | break; | |
7495 | ||
d8492bd3 | 7496 | CASE_INT_FN (BUILT_IN_CLRSB): |
d8492bd3 | 7497 | target = expand_builtin_unop (target_mode, exp, target, |
7498 | subtarget, clrsb_optab); | |
7499 | if (target) | |
7500 | return target; | |
7501 | break; | |
7502 | ||
4f35b1fc | 7503 | CASE_INT_FN (BUILT_IN_POPCOUNT): |
c2f47e15 | 7504 | target = expand_builtin_unop (target_mode, exp, target, |
efb070c8 | 7505 | subtarget, popcount_optab); |
6a08d0ab | 7506 | if (target) |
7507 | return target; | |
7508 | break; | |
7509 | ||
4f35b1fc | 7510 | CASE_INT_FN (BUILT_IN_PARITY): |
c2f47e15 | 7511 | target = expand_builtin_unop (target_mode, exp, target, |
efb070c8 | 7512 | subtarget, parity_optab); |
53800dbe | 7513 | if (target) |
7514 | return target; | |
7515 | break; | |
7516 | ||
7517 | case BUILT_IN_STRLEN: | |
c2f47e15 | 7518 | target = expand_builtin_strlen (exp, target, target_mode); |
53800dbe | 7519 | if (target) |
7520 | return target; | |
7521 | break; | |
7522 | ||
864bd5de | 7523 | case BUILT_IN_STRNLEN: |
7524 | target = expand_builtin_strnlen (exp, target, target_mode); | |
7525 | if (target) | |
7526 | return target; | |
7527 | break; | |
7528 | ||
5aef8938 | 7529 | case BUILT_IN_STRCAT: |
7530 | target = expand_builtin_strcat (exp, target); | |
7531 | if (target) | |
7532 | return target; | |
7533 | break; | |
7534 | ||
53800dbe | 7535 | case BUILT_IN_STRCPY: |
a65c4d64 | 7536 | target = expand_builtin_strcpy (exp, target); |
53800dbe | 7537 | if (target) |
7538 | return target; | |
7539 | break; | |
bf8e3599 | 7540 | |
5aef8938 | 7541 | case BUILT_IN_STRNCAT: |
7542 | target = expand_builtin_strncat (exp, target); | |
7543 | if (target) | |
7544 | return target; | |
7545 | break; | |
7546 | ||
ed09096d | 7547 | case BUILT_IN_STRNCPY: |
a65c4d64 | 7548 | target = expand_builtin_strncpy (exp, target); |
ed09096d | 7549 | if (target) |
7550 | return target; | |
7551 | break; | |
bf8e3599 | 7552 | |
3b824fa6 | 7553 | case BUILT_IN_STPCPY: |
dc369150 | 7554 | target = expand_builtin_stpcpy (exp, target, mode); |
3b824fa6 | 7555 | if (target) |
7556 | return target; | |
7557 | break; | |
7558 | ||
4d317237 | 7559 | case BUILT_IN_STPNCPY: |
7560 | target = expand_builtin_stpncpy (exp, target); | |
7561 | if (target) | |
7562 | return target; | |
7563 | break; | |
7564 | ||
8d6c6ef5 | 7565 | case BUILT_IN_MEMCHR: |
7566 | target = expand_builtin_memchr (exp, target); | |
7567 | if (target) | |
7568 | return target; | |
7569 | break; | |
7570 | ||
53800dbe | 7571 | case BUILT_IN_MEMCPY: |
a65c4d64 | 7572 | target = expand_builtin_memcpy (exp, target); |
3b824fa6 | 7573 | if (target) |
7574 | return target; | |
7575 | break; | |
7576 | ||
4d317237 | 7577 | case BUILT_IN_MEMMOVE: |
7578 | target = expand_builtin_memmove (exp, target); | |
7579 | if (target) | |
7580 | return target; | |
7581 | break; | |
7582 | ||
3b824fa6 | 7583 | case BUILT_IN_MEMPCPY: |
d0fbba1a | 7584 | target = expand_builtin_mempcpy (exp, target); |
53800dbe | 7585 | if (target) |
7586 | return target; | |
7587 | break; | |
7588 | ||
7589 | case BUILT_IN_MEMSET: | |
c2f47e15 | 7590 | target = expand_builtin_memset (exp, target, mode); |
53800dbe | 7591 | if (target) |
7592 | return target; | |
7593 | break; | |
7594 | ||
ffc83088 | 7595 | case BUILT_IN_BZERO: |
0b25db21 | 7596 | target = expand_builtin_bzero (exp); |
ffc83088 | 7597 | if (target) |
7598 | return target; | |
7599 | break; | |
7600 | ||
b3e6ae76 | 7601 | /* Expand it as BUILT_IN_MEMCMP_EQ first. If not successful, change it |
72dbc21d | 7602 | back to a BUILT_IN_STRCMP. Remember to delete the 3rd paramater |
7603 | when changing it to a strcmp call. */ | |
7604 | case BUILT_IN_STRCMP_EQ: | |
7605 | target = expand_builtin_memcmp (exp, target, true); | |
7606 | if (target) | |
7607 | return target; | |
7608 | ||
7609 | /* Change this call back to a BUILT_IN_STRCMP. */ | |
b3e6ae76 | 7610 | TREE_OPERAND (exp, 1) |
72dbc21d | 7611 | = build_fold_addr_expr (builtin_decl_explicit (BUILT_IN_STRCMP)); |
7612 | ||
7613 | /* Delete the last parameter. */ | |
7614 | unsigned int i; | |
7615 | vec<tree, va_gc> *arg_vec; | |
7616 | vec_alloc (arg_vec, 2); | |
7617 | for (i = 0; i < 2; i++) | |
7618 | arg_vec->quick_push (CALL_EXPR_ARG (exp, i)); | |
7619 | exp = build_call_vec (TREE_TYPE (exp), CALL_EXPR_FN (exp), arg_vec); | |
7620 | /* FALLTHROUGH */ | |
7621 | ||
53800dbe | 7622 | case BUILT_IN_STRCMP: |
a65c4d64 | 7623 | target = expand_builtin_strcmp (exp, target); |
53800dbe | 7624 | if (target) |
7625 | return target; | |
7626 | break; | |
7627 | ||
72dbc21d | 7628 | /* Expand it as BUILT_IN_MEMCMP_EQ first. If not successful, change it |
7629 | back to a BUILT_IN_STRNCMP. */ | |
7630 | case BUILT_IN_STRNCMP_EQ: | |
7631 | target = expand_builtin_memcmp (exp, target, true); | |
7632 | if (target) | |
7633 | return target; | |
7634 | ||
7635 | /* Change it back to a BUILT_IN_STRNCMP. */ | |
b3e6ae76 | 7636 | TREE_OPERAND (exp, 1) |
72dbc21d | 7637 | = build_fold_addr_expr (builtin_decl_explicit (BUILT_IN_STRNCMP)); |
7638 | /* FALLTHROUGH */ | |
7639 | ||
ed09096d | 7640 | case BUILT_IN_STRNCMP: |
7641 | target = expand_builtin_strncmp (exp, target, mode); | |
7642 | if (target) | |
7643 | return target; | |
7644 | break; | |
7645 | ||
071f1696 | 7646 | case BUILT_IN_BCMP: |
53800dbe | 7647 | case BUILT_IN_MEMCMP: |
3e346f54 | 7648 | case BUILT_IN_MEMCMP_EQ: |
7649 | target = expand_builtin_memcmp (exp, target, fcode == BUILT_IN_MEMCMP_EQ); | |
53800dbe | 7650 | if (target) |
7651 | return target; | |
3e346f54 | 7652 | if (fcode == BUILT_IN_MEMCMP_EQ) |
7653 | { | |
7654 | tree newdecl = builtin_decl_explicit (BUILT_IN_MEMCMP); | |
7655 | TREE_OPERAND (exp, 1) = build_fold_addr_expr (newdecl); | |
7656 | } | |
53800dbe | 7657 | break; |
53800dbe | 7658 | |
7659 | case BUILT_IN_SETJMP: | |
12f08300 | 7660 | /* This should have been lowered to the builtins below. */ |
2c8a1497 | 7661 | gcc_unreachable (); |
7662 | ||
7663 | case BUILT_IN_SETJMP_SETUP: | |
7664 | /* __builtin_setjmp_setup is passed a pointer to an array of five words | |
7665 | and the receiver label. */ | |
c2f47e15 | 7666 | if (validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
2c8a1497 | 7667 | { |
c2f47e15 | 7668 | rtx buf_addr = expand_expr (CALL_EXPR_ARG (exp, 0), subtarget, |
2c8a1497 | 7669 | VOIDmode, EXPAND_NORMAL); |
c2f47e15 | 7670 | tree label = TREE_OPERAND (CALL_EXPR_ARG (exp, 1), 0); |
9ed997be | 7671 | rtx_insn *label_r = label_rtx (label); |
2c8a1497 | 7672 | |
7673 | /* This is copied from the handling of non-local gotos. */ | |
7674 | expand_builtin_setjmp_setup (buf_addr, label_r); | |
7675 | nonlocal_goto_handler_labels | |
a4de1c23 | 7676 | = gen_rtx_INSN_LIST (VOIDmode, label_r, |
2c8a1497 | 7677 | nonlocal_goto_handler_labels); |
7678 | /* ??? Do not let expand_label treat us as such since we would | |
7679 | not want to be both on the list of non-local labels and on | |
7680 | the list of forced labels. */ | |
7681 | FORCED_LABEL (label) = 0; | |
7682 | return const0_rtx; | |
7683 | } | |
7684 | break; | |
7685 | ||
2c8a1497 | 7686 | case BUILT_IN_SETJMP_RECEIVER: |
7687 | /* __builtin_setjmp_receiver is passed the receiver label. */ | |
c2f47e15 | 7688 | if (validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) |
2c8a1497 | 7689 | { |
c2f47e15 | 7690 | tree label = TREE_OPERAND (CALL_EXPR_ARG (exp, 0), 0); |
9ed997be | 7691 | rtx_insn *label_r = label_rtx (label); |
2c8a1497 | 7692 | |
7693 | expand_builtin_setjmp_receiver (label_r); | |
7694 | return const0_rtx; | |
7695 | } | |
6b7f6858 | 7696 | break; |
53800dbe | 7697 | |
7698 | /* __builtin_longjmp is passed a pointer to an array of five words. | |
7699 | It's similar to the C library longjmp function but works with | |
7700 | __builtin_setjmp above. */ | |
7701 | case BUILT_IN_LONGJMP: | |
c2f47e15 | 7702 | if (validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
53800dbe | 7703 | { |
c2f47e15 | 7704 | rtx buf_addr = expand_expr (CALL_EXPR_ARG (exp, 0), subtarget, |
8ec3c5c2 | 7705 | VOIDmode, EXPAND_NORMAL); |
c2f47e15 | 7706 | rtx value = expand_normal (CALL_EXPR_ARG (exp, 1)); |
53800dbe | 7707 | |
7708 | if (value != const1_rtx) | |
7709 | { | |
1e5fcbe2 | 7710 | error ("%<__builtin_longjmp%> second argument must be 1"); |
53800dbe | 7711 | return const0_rtx; |
7712 | } | |
7713 | ||
7714 | expand_builtin_longjmp (buf_addr, value); | |
7715 | return const0_rtx; | |
7716 | } | |
2c8a1497 | 7717 | break; |
53800dbe | 7718 | |
4ee9c684 | 7719 | case BUILT_IN_NONLOCAL_GOTO: |
c2f47e15 | 7720 | target = expand_builtin_nonlocal_goto (exp); |
4ee9c684 | 7721 | if (target) |
7722 | return target; | |
7723 | break; | |
7724 | ||
843d08a9 | 7725 | /* This updates the setjmp buffer that is its argument with the value |
7726 | of the current stack pointer. */ | |
7727 | case BUILT_IN_UPDATE_SETJMP_BUF: | |
c2f47e15 | 7728 | if (validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) |
843d08a9 | 7729 | { |
7730 | rtx buf_addr | |
c2f47e15 | 7731 | = expand_normal (CALL_EXPR_ARG (exp, 0)); |
843d08a9 | 7732 | |
7733 | expand_builtin_update_setjmp_buf (buf_addr); | |
7734 | return const0_rtx; | |
7735 | } | |
7736 | break; | |
7737 | ||
53800dbe | 7738 | case BUILT_IN_TRAP: |
a0ef1725 | 7739 | expand_builtin_trap (); |
53800dbe | 7740 | return const0_rtx; |
7741 | ||
d2b48f0c | 7742 | case BUILT_IN_UNREACHABLE: |
7743 | expand_builtin_unreachable (); | |
7744 | return const0_rtx; | |
7745 | ||
4f35b1fc | 7746 | CASE_FLT_FN (BUILT_IN_SIGNBIT): |
004e23c4 | 7747 | case BUILT_IN_SIGNBITD32: |
7748 | case BUILT_IN_SIGNBITD64: | |
7749 | case BUILT_IN_SIGNBITD128: | |
27f261ef | 7750 | target = expand_builtin_signbit (exp, target); |
7751 | if (target) | |
7752 | return target; | |
7753 | break; | |
7754 | ||
53800dbe | 7755 | /* Various hooks for the DWARF 2 __throw routine. */ |
7756 | case BUILT_IN_UNWIND_INIT: | |
7757 | expand_builtin_unwind_init (); | |
7758 | return const0_rtx; | |
7759 | case BUILT_IN_DWARF_CFA: | |
7760 | return virtual_cfa_rtx; | |
7761 | #ifdef DWARF2_UNWIND_INFO | |
f8f023a5 | 7762 | case BUILT_IN_DWARF_SP_COLUMN: |
7763 | return expand_builtin_dwarf_sp_column (); | |
695e919b | 7764 | case BUILT_IN_INIT_DWARF_REG_SIZES: |
c2f47e15 | 7765 | expand_builtin_init_dwarf_reg_sizes (CALL_EXPR_ARG (exp, 0)); |
695e919b | 7766 | return const0_rtx; |
53800dbe | 7767 | #endif |
7768 | case BUILT_IN_FROB_RETURN_ADDR: | |
c2f47e15 | 7769 | return expand_builtin_frob_return_addr (CALL_EXPR_ARG (exp, 0)); |
53800dbe | 7770 | case BUILT_IN_EXTRACT_RETURN_ADDR: |
c2f47e15 | 7771 | return expand_builtin_extract_return_addr (CALL_EXPR_ARG (exp, 0)); |
53800dbe | 7772 | case BUILT_IN_EH_RETURN: |
c2f47e15 | 7773 | expand_builtin_eh_return (CALL_EXPR_ARG (exp, 0), |
7774 | CALL_EXPR_ARG (exp, 1)); | |
53800dbe | 7775 | return const0_rtx; |
df4b504c | 7776 | case BUILT_IN_EH_RETURN_DATA_REGNO: |
c2f47e15 | 7777 | return expand_builtin_eh_return_data_regno (exp); |
26093bf4 | 7778 | case BUILT_IN_EXTEND_POINTER: |
c2f47e15 | 7779 | return expand_builtin_extend_pointer (CALL_EXPR_ARG (exp, 0)); |
e38def9c | 7780 | case BUILT_IN_EH_POINTER: |
7781 | return expand_builtin_eh_pointer (exp); | |
7782 | case BUILT_IN_EH_FILTER: | |
7783 | return expand_builtin_eh_filter (exp); | |
7784 | case BUILT_IN_EH_COPY_VALUES: | |
7785 | return expand_builtin_eh_copy_values (exp); | |
26093bf4 | 7786 | |
7ccc713a | 7787 | case BUILT_IN_VA_START: |
c2f47e15 | 7788 | return expand_builtin_va_start (exp); |
a66c9326 | 7789 | case BUILT_IN_VA_END: |
c2f47e15 | 7790 | return expand_builtin_va_end (exp); |
a66c9326 | 7791 | case BUILT_IN_VA_COPY: |
c2f47e15 | 7792 | return expand_builtin_va_copy (exp); |
89cfe6e5 | 7793 | case BUILT_IN_EXPECT: |
c2f47e15 | 7794 | return expand_builtin_expect (exp, target); |
01107f42 | 7795 | case BUILT_IN_EXPECT_WITH_PROBABILITY: |
7796 | return expand_builtin_expect_with_probability (exp, target); | |
fca0886c | 7797 | case BUILT_IN_ASSUME_ALIGNED: |
7798 | return expand_builtin_assume_aligned (exp, target); | |
5e3608d8 | 7799 | case BUILT_IN_PREFETCH: |
c2f47e15 | 7800 | expand_builtin_prefetch (exp); |
5e3608d8 | 7801 | return const0_rtx; |
7802 | ||
4ee9c684 | 7803 | case BUILT_IN_INIT_TRAMPOLINE: |
c307f106 | 7804 | return expand_builtin_init_trampoline (exp, true); |
7805 | case BUILT_IN_INIT_HEAP_TRAMPOLINE: | |
7806 | return expand_builtin_init_trampoline (exp, false); | |
4ee9c684 | 7807 | case BUILT_IN_ADJUST_TRAMPOLINE: |
c2f47e15 | 7808 | return expand_builtin_adjust_trampoline (exp); |
4ee9c684 | 7809 | |
a27e3913 | 7810 | case BUILT_IN_INIT_DESCRIPTOR: |
7811 | return expand_builtin_init_descriptor (exp); | |
7812 | case BUILT_IN_ADJUST_DESCRIPTOR: | |
7813 | return expand_builtin_adjust_descriptor (exp); | |
7814 | ||
73673831 | 7815 | case BUILT_IN_FORK: |
7816 | case BUILT_IN_EXECL: | |
7817 | case BUILT_IN_EXECV: | |
7818 | case BUILT_IN_EXECLP: | |
7819 | case BUILT_IN_EXECLE: | |
7820 | case BUILT_IN_EXECVP: | |
7821 | case BUILT_IN_EXECVE: | |
c2f47e15 | 7822 | target = expand_builtin_fork_or_exec (fndecl, exp, target, ignore); |
73673831 | 7823 | if (target) |
7824 | return target; | |
7825 | break; | |
53800dbe | 7826 | |
2797f13a | 7827 | case BUILT_IN_SYNC_FETCH_AND_ADD_1: |
7828 | case BUILT_IN_SYNC_FETCH_AND_ADD_2: | |
7829 | case BUILT_IN_SYNC_FETCH_AND_ADD_4: | |
7830 | case BUILT_IN_SYNC_FETCH_AND_ADD_8: | |
7831 | case BUILT_IN_SYNC_FETCH_AND_ADD_16: | |
7832 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_ADD_1); | |
1cd6e20d | 7833 | target = expand_builtin_sync_operation (mode, exp, PLUS, false, target); |
b6a5fc45 | 7834 | if (target) |
7835 | return target; | |
7836 | break; | |
7837 | ||
2797f13a | 7838 | case BUILT_IN_SYNC_FETCH_AND_SUB_1: |
7839 | case BUILT_IN_SYNC_FETCH_AND_SUB_2: | |
7840 | case BUILT_IN_SYNC_FETCH_AND_SUB_4: | |
7841 | case BUILT_IN_SYNC_FETCH_AND_SUB_8: | |
7842 | case BUILT_IN_SYNC_FETCH_AND_SUB_16: | |
7843 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_SUB_1); | |
1cd6e20d | 7844 | target = expand_builtin_sync_operation (mode, exp, MINUS, false, target); |
b6a5fc45 | 7845 | if (target) |
7846 | return target; | |
7847 | break; | |
7848 | ||
2797f13a | 7849 | case BUILT_IN_SYNC_FETCH_AND_OR_1: |
7850 | case BUILT_IN_SYNC_FETCH_AND_OR_2: | |
7851 | case BUILT_IN_SYNC_FETCH_AND_OR_4: | |
7852 | case BUILT_IN_SYNC_FETCH_AND_OR_8: | |
7853 | case BUILT_IN_SYNC_FETCH_AND_OR_16: | |
7854 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_OR_1); | |
1cd6e20d | 7855 | target = expand_builtin_sync_operation (mode, exp, IOR, false, target); |
b6a5fc45 | 7856 | if (target) |
7857 | return target; | |
7858 | break; | |
7859 | ||
2797f13a | 7860 | case BUILT_IN_SYNC_FETCH_AND_AND_1: |
7861 | case BUILT_IN_SYNC_FETCH_AND_AND_2: | |
7862 | case BUILT_IN_SYNC_FETCH_AND_AND_4: | |
7863 | case BUILT_IN_SYNC_FETCH_AND_AND_8: | |
7864 | case BUILT_IN_SYNC_FETCH_AND_AND_16: | |
7865 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_AND_1); | |
1cd6e20d | 7866 | target = expand_builtin_sync_operation (mode, exp, AND, false, target); |
b6a5fc45 | 7867 | if (target) |
7868 | return target; | |
7869 | break; | |
7870 | ||
2797f13a | 7871 | case BUILT_IN_SYNC_FETCH_AND_XOR_1: |
7872 | case BUILT_IN_SYNC_FETCH_AND_XOR_2: | |
7873 | case BUILT_IN_SYNC_FETCH_AND_XOR_4: | |
7874 | case BUILT_IN_SYNC_FETCH_AND_XOR_8: | |
7875 | case BUILT_IN_SYNC_FETCH_AND_XOR_16: | |
7876 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_XOR_1); | |
1cd6e20d | 7877 | target = expand_builtin_sync_operation (mode, exp, XOR, false, target); |
b6a5fc45 | 7878 | if (target) |
7879 | return target; | |
7880 | break; | |
7881 | ||
2797f13a | 7882 | case BUILT_IN_SYNC_FETCH_AND_NAND_1: |
7883 | case BUILT_IN_SYNC_FETCH_AND_NAND_2: | |
7884 | case BUILT_IN_SYNC_FETCH_AND_NAND_4: | |
7885 | case BUILT_IN_SYNC_FETCH_AND_NAND_8: | |
7886 | case BUILT_IN_SYNC_FETCH_AND_NAND_16: | |
7887 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_NAND_1); | |
1cd6e20d | 7888 | target = expand_builtin_sync_operation (mode, exp, NOT, false, target); |
b6a5fc45 | 7889 | if (target) |
7890 | return target; | |
7891 | break; | |
7892 | ||
2797f13a | 7893 | case BUILT_IN_SYNC_ADD_AND_FETCH_1: |
7894 | case BUILT_IN_SYNC_ADD_AND_FETCH_2: | |
7895 | case BUILT_IN_SYNC_ADD_AND_FETCH_4: | |
7896 | case BUILT_IN_SYNC_ADD_AND_FETCH_8: | |
7897 | case BUILT_IN_SYNC_ADD_AND_FETCH_16: | |
7898 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_ADD_AND_FETCH_1); | |
1cd6e20d | 7899 | target = expand_builtin_sync_operation (mode, exp, PLUS, true, target); |
b6a5fc45 | 7900 | if (target) |
7901 | return target; | |
7902 | break; | |
7903 | ||
2797f13a | 7904 | case BUILT_IN_SYNC_SUB_AND_FETCH_1: |
7905 | case BUILT_IN_SYNC_SUB_AND_FETCH_2: | |
7906 | case BUILT_IN_SYNC_SUB_AND_FETCH_4: | |
7907 | case BUILT_IN_SYNC_SUB_AND_FETCH_8: | |
7908 | case BUILT_IN_SYNC_SUB_AND_FETCH_16: | |
7909 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_SUB_AND_FETCH_1); | |
1cd6e20d | 7910 | target = expand_builtin_sync_operation (mode, exp, MINUS, true, target); |
b6a5fc45 | 7911 | if (target) |
7912 | return target; | |
7913 | break; | |
7914 | ||
2797f13a | 7915 | case BUILT_IN_SYNC_OR_AND_FETCH_1: |
7916 | case BUILT_IN_SYNC_OR_AND_FETCH_2: | |
7917 | case BUILT_IN_SYNC_OR_AND_FETCH_4: | |
7918 | case BUILT_IN_SYNC_OR_AND_FETCH_8: | |
7919 | case BUILT_IN_SYNC_OR_AND_FETCH_16: | |
7920 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_OR_AND_FETCH_1); | |
1cd6e20d | 7921 | target = expand_builtin_sync_operation (mode, exp, IOR, true, target); |
b6a5fc45 | 7922 | if (target) |
7923 | return target; | |
7924 | break; | |
7925 | ||
2797f13a | 7926 | case BUILT_IN_SYNC_AND_AND_FETCH_1: |
7927 | case BUILT_IN_SYNC_AND_AND_FETCH_2: | |
7928 | case BUILT_IN_SYNC_AND_AND_FETCH_4: | |
7929 | case BUILT_IN_SYNC_AND_AND_FETCH_8: | |
7930 | case BUILT_IN_SYNC_AND_AND_FETCH_16: | |
7931 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_AND_AND_FETCH_1); | |
1cd6e20d | 7932 | target = expand_builtin_sync_operation (mode, exp, AND, true, target); |
b6a5fc45 | 7933 | if (target) |
7934 | return target; | |
7935 | break; | |
7936 | ||
2797f13a | 7937 | case BUILT_IN_SYNC_XOR_AND_FETCH_1: |
7938 | case BUILT_IN_SYNC_XOR_AND_FETCH_2: | |
7939 | case BUILT_IN_SYNC_XOR_AND_FETCH_4: | |
7940 | case BUILT_IN_SYNC_XOR_AND_FETCH_8: | |
7941 | case BUILT_IN_SYNC_XOR_AND_FETCH_16: | |
7942 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_XOR_AND_FETCH_1); | |
1cd6e20d | 7943 | target = expand_builtin_sync_operation (mode, exp, XOR, true, target); |
b6a5fc45 | 7944 | if (target) |
7945 | return target; | |
7946 | break; | |
7947 | ||
2797f13a | 7948 | case BUILT_IN_SYNC_NAND_AND_FETCH_1: |
7949 | case BUILT_IN_SYNC_NAND_AND_FETCH_2: | |
7950 | case BUILT_IN_SYNC_NAND_AND_FETCH_4: | |
7951 | case BUILT_IN_SYNC_NAND_AND_FETCH_8: | |
7952 | case BUILT_IN_SYNC_NAND_AND_FETCH_16: | |
7953 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_NAND_AND_FETCH_1); | |
1cd6e20d | 7954 | target = expand_builtin_sync_operation (mode, exp, NOT, true, target); |
b6a5fc45 | 7955 | if (target) |
7956 | return target; | |
7957 | break; | |
7958 | ||
2797f13a | 7959 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_1: |
7960 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_2: | |
7961 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_4: | |
7962 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_8: | |
7963 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_16: | |
a601d32a | 7964 | if (mode == VOIDmode) |
7965 | mode = TYPE_MODE (boolean_type_node); | |
b6a5fc45 | 7966 | if (!target || !register_operand (target, mode)) |
7967 | target = gen_reg_rtx (mode); | |
3e272de8 | 7968 | |
2797f13a | 7969 | mode = get_builtin_sync_mode |
7970 | (fcode - BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_1); | |
c2f47e15 | 7971 | target = expand_builtin_compare_and_swap (mode, exp, true, target); |
b6a5fc45 | 7972 | if (target) |
7973 | return target; | |
7974 | break; | |
7975 | ||
2797f13a | 7976 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_1: |
7977 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_2: | |
7978 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_4: | |
7979 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_8: | |
7980 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_16: | |
7981 | mode = get_builtin_sync_mode | |
7982 | (fcode - BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_1); | |
c2f47e15 | 7983 | target = expand_builtin_compare_and_swap (mode, exp, false, target); |
b6a5fc45 | 7984 | if (target) |
7985 | return target; | |
7986 | break; | |
7987 | ||
2797f13a | 7988 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_1: |
7989 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_2: | |
7990 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_4: | |
7991 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_8: | |
7992 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_16: | |
7993 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_LOCK_TEST_AND_SET_1); | |
7994 | target = expand_builtin_sync_lock_test_and_set (mode, exp, target); | |
b6a5fc45 | 7995 | if (target) |
7996 | return target; | |
7997 | break; | |
7998 | ||
2797f13a | 7999 | case BUILT_IN_SYNC_LOCK_RELEASE_1: |
8000 | case BUILT_IN_SYNC_LOCK_RELEASE_2: | |
8001 | case BUILT_IN_SYNC_LOCK_RELEASE_4: | |
8002 | case BUILT_IN_SYNC_LOCK_RELEASE_8: | |
8003 | case BUILT_IN_SYNC_LOCK_RELEASE_16: | |
8004 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_LOCK_RELEASE_1); | |
8005 | expand_builtin_sync_lock_release (mode, exp); | |
b6a5fc45 | 8006 | return const0_rtx; |
8007 | ||
2797f13a | 8008 | case BUILT_IN_SYNC_SYNCHRONIZE: |
8009 | expand_builtin_sync_synchronize (); | |
b6a5fc45 | 8010 | return const0_rtx; |
8011 | ||
1cd6e20d | 8012 | case BUILT_IN_ATOMIC_EXCHANGE_1: |
8013 | case BUILT_IN_ATOMIC_EXCHANGE_2: | |
8014 | case BUILT_IN_ATOMIC_EXCHANGE_4: | |
8015 | case BUILT_IN_ATOMIC_EXCHANGE_8: | |
8016 | case BUILT_IN_ATOMIC_EXCHANGE_16: | |
8017 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_EXCHANGE_1); | |
8018 | target = expand_builtin_atomic_exchange (mode, exp, target); | |
8019 | if (target) | |
8020 | return target; | |
8021 | break; | |
8022 | ||
8023 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_1: | |
8024 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_2: | |
8025 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_4: | |
8026 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_8: | |
8027 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_16: | |
2c201ad1 | 8028 | { |
8029 | unsigned int nargs, z; | |
f1f41a6c | 8030 | vec<tree, va_gc> *vec; |
2c201ad1 | 8031 | |
8032 | mode = | |
8033 | get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_COMPARE_EXCHANGE_1); | |
8034 | target = expand_builtin_atomic_compare_exchange (mode, exp, target); | |
8035 | if (target) | |
8036 | return target; | |
8037 | ||
8038 | /* If this is turned into an external library call, the weak parameter | |
8039 | must be dropped to match the expected parameter list. */ | |
8040 | nargs = call_expr_nargs (exp); | |
f1f41a6c | 8041 | vec_alloc (vec, nargs - 1); |
2c201ad1 | 8042 | for (z = 0; z < 3; z++) |
f1f41a6c | 8043 | vec->quick_push (CALL_EXPR_ARG (exp, z)); |
2c201ad1 | 8044 | /* Skip the boolean weak parameter. */ |
8045 | for (z = 4; z < 6; z++) | |
f1f41a6c | 8046 | vec->quick_push (CALL_EXPR_ARG (exp, z)); |
2c201ad1 | 8047 | exp = build_call_vec (TREE_TYPE (exp), CALL_EXPR_FN (exp), vec); |
8048 | break; | |
8049 | } | |
1cd6e20d | 8050 | |
8051 | case BUILT_IN_ATOMIC_LOAD_1: | |
8052 | case BUILT_IN_ATOMIC_LOAD_2: | |
8053 | case BUILT_IN_ATOMIC_LOAD_4: | |
8054 | case BUILT_IN_ATOMIC_LOAD_8: | |
8055 | case BUILT_IN_ATOMIC_LOAD_16: | |
8056 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_LOAD_1); | |
8057 | target = expand_builtin_atomic_load (mode, exp, target); | |
8058 | if (target) | |
8059 | return target; | |
8060 | break; | |
8061 | ||
8062 | case BUILT_IN_ATOMIC_STORE_1: | |
8063 | case BUILT_IN_ATOMIC_STORE_2: | |
8064 | case BUILT_IN_ATOMIC_STORE_4: | |
8065 | case BUILT_IN_ATOMIC_STORE_8: | |
8066 | case BUILT_IN_ATOMIC_STORE_16: | |
8067 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_STORE_1); | |
8068 | target = expand_builtin_atomic_store (mode, exp); | |
8069 | if (target) | |
8070 | return const0_rtx; | |
8071 | break; | |
8072 | ||
8073 | case BUILT_IN_ATOMIC_ADD_FETCH_1: | |
8074 | case BUILT_IN_ATOMIC_ADD_FETCH_2: | |
8075 | case BUILT_IN_ATOMIC_ADD_FETCH_4: | |
8076 | case BUILT_IN_ATOMIC_ADD_FETCH_8: | |
8077 | case BUILT_IN_ATOMIC_ADD_FETCH_16: | |
8078 | { | |
8079 | enum built_in_function lib; | |
8080 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_ADD_FETCH_1); | |
8081 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_ADD_1 + | |
8082 | (fcode - BUILT_IN_ATOMIC_ADD_FETCH_1)); | |
8083 | target = expand_builtin_atomic_fetch_op (mode, exp, target, PLUS, true, | |
8084 | ignore, lib); | |
8085 | if (target) | |
8086 | return target; | |
8087 | break; | |
8088 | } | |
8089 | case BUILT_IN_ATOMIC_SUB_FETCH_1: | |
8090 | case BUILT_IN_ATOMIC_SUB_FETCH_2: | |
8091 | case BUILT_IN_ATOMIC_SUB_FETCH_4: | |
8092 | case BUILT_IN_ATOMIC_SUB_FETCH_8: | |
8093 | case BUILT_IN_ATOMIC_SUB_FETCH_16: | |
8094 | { | |
8095 | enum built_in_function lib; | |
8096 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_SUB_FETCH_1); | |
8097 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_SUB_1 + | |
8098 | (fcode - BUILT_IN_ATOMIC_SUB_FETCH_1)); | |
8099 | target = expand_builtin_atomic_fetch_op (mode, exp, target, MINUS, true, | |
8100 | ignore, lib); | |
8101 | if (target) | |
8102 | return target; | |
8103 | break; | |
8104 | } | |
8105 | case BUILT_IN_ATOMIC_AND_FETCH_1: | |
8106 | case BUILT_IN_ATOMIC_AND_FETCH_2: | |
8107 | case BUILT_IN_ATOMIC_AND_FETCH_4: | |
8108 | case BUILT_IN_ATOMIC_AND_FETCH_8: | |
8109 | case BUILT_IN_ATOMIC_AND_FETCH_16: | |
8110 | { | |
8111 | enum built_in_function lib; | |
8112 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_AND_FETCH_1); | |
8113 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_AND_1 + | |
8114 | (fcode - BUILT_IN_ATOMIC_AND_FETCH_1)); | |
8115 | target = expand_builtin_atomic_fetch_op (mode, exp, target, AND, true, | |
8116 | ignore, lib); | |
8117 | if (target) | |
8118 | return target; | |
8119 | break; | |
8120 | } | |
8121 | case BUILT_IN_ATOMIC_NAND_FETCH_1: | |
8122 | case BUILT_IN_ATOMIC_NAND_FETCH_2: | |
8123 | case BUILT_IN_ATOMIC_NAND_FETCH_4: | |
8124 | case BUILT_IN_ATOMIC_NAND_FETCH_8: | |
8125 | case BUILT_IN_ATOMIC_NAND_FETCH_16: | |
8126 | { | |
8127 | enum built_in_function lib; | |
8128 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_NAND_FETCH_1); | |
8129 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_NAND_1 + | |
8130 | (fcode - BUILT_IN_ATOMIC_NAND_FETCH_1)); | |
8131 | target = expand_builtin_atomic_fetch_op (mode, exp, target, NOT, true, | |
8132 | ignore, lib); | |
8133 | if (target) | |
8134 | return target; | |
8135 | break; | |
8136 | } | |
8137 | case BUILT_IN_ATOMIC_XOR_FETCH_1: | |
8138 | case BUILT_IN_ATOMIC_XOR_FETCH_2: | |
8139 | case BUILT_IN_ATOMIC_XOR_FETCH_4: | |
8140 | case BUILT_IN_ATOMIC_XOR_FETCH_8: | |
8141 | case BUILT_IN_ATOMIC_XOR_FETCH_16: | |
8142 | { | |
8143 | enum built_in_function lib; | |
8144 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_XOR_FETCH_1); | |
8145 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_XOR_1 + | |
8146 | (fcode - BUILT_IN_ATOMIC_XOR_FETCH_1)); | |
8147 | target = expand_builtin_atomic_fetch_op (mode, exp, target, XOR, true, | |
8148 | ignore, lib); | |
8149 | if (target) | |
8150 | return target; | |
8151 | break; | |
8152 | } | |
8153 | case BUILT_IN_ATOMIC_OR_FETCH_1: | |
8154 | case BUILT_IN_ATOMIC_OR_FETCH_2: | |
8155 | case BUILT_IN_ATOMIC_OR_FETCH_4: | |
8156 | case BUILT_IN_ATOMIC_OR_FETCH_8: | |
8157 | case BUILT_IN_ATOMIC_OR_FETCH_16: | |
8158 | { | |
8159 | enum built_in_function lib; | |
8160 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_OR_FETCH_1); | |
8161 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_OR_1 + | |
8162 | (fcode - BUILT_IN_ATOMIC_OR_FETCH_1)); | |
8163 | target = expand_builtin_atomic_fetch_op (mode, exp, target, IOR, true, | |
8164 | ignore, lib); | |
8165 | if (target) | |
8166 | return target; | |
8167 | break; | |
8168 | } | |
8169 | case BUILT_IN_ATOMIC_FETCH_ADD_1: | |
8170 | case BUILT_IN_ATOMIC_FETCH_ADD_2: | |
8171 | case BUILT_IN_ATOMIC_FETCH_ADD_4: | |
8172 | case BUILT_IN_ATOMIC_FETCH_ADD_8: | |
8173 | case BUILT_IN_ATOMIC_FETCH_ADD_16: | |
8174 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_ADD_1); | |
8175 | target = expand_builtin_atomic_fetch_op (mode, exp, target, PLUS, false, | |
8176 | ignore, BUILT_IN_NONE); | |
8177 | if (target) | |
8178 | return target; | |
8179 | break; | |
8180 | ||
8181 | case BUILT_IN_ATOMIC_FETCH_SUB_1: | |
8182 | case BUILT_IN_ATOMIC_FETCH_SUB_2: | |
8183 | case BUILT_IN_ATOMIC_FETCH_SUB_4: | |
8184 | case BUILT_IN_ATOMIC_FETCH_SUB_8: | |
8185 | case BUILT_IN_ATOMIC_FETCH_SUB_16: | |
8186 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_SUB_1); | |
8187 | target = expand_builtin_atomic_fetch_op (mode, exp, target, MINUS, false, | |
8188 | ignore, BUILT_IN_NONE); | |
8189 | if (target) | |
8190 | return target; | |
8191 | break; | |
8192 | ||
8193 | case BUILT_IN_ATOMIC_FETCH_AND_1: | |
8194 | case BUILT_IN_ATOMIC_FETCH_AND_2: | |
8195 | case BUILT_IN_ATOMIC_FETCH_AND_4: | |
8196 | case BUILT_IN_ATOMIC_FETCH_AND_8: | |
8197 | case BUILT_IN_ATOMIC_FETCH_AND_16: | |
8198 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_AND_1); | |
8199 | target = expand_builtin_atomic_fetch_op (mode, exp, target, AND, false, | |
8200 | ignore, BUILT_IN_NONE); | |
8201 | if (target) | |
8202 | return target; | |
8203 | break; | |
8204 | ||
8205 | case BUILT_IN_ATOMIC_FETCH_NAND_1: | |
8206 | case BUILT_IN_ATOMIC_FETCH_NAND_2: | |
8207 | case BUILT_IN_ATOMIC_FETCH_NAND_4: | |
8208 | case BUILT_IN_ATOMIC_FETCH_NAND_8: | |
8209 | case BUILT_IN_ATOMIC_FETCH_NAND_16: | |
8210 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_NAND_1); | |
8211 | target = expand_builtin_atomic_fetch_op (mode, exp, target, NOT, false, | |
8212 | ignore, BUILT_IN_NONE); | |
8213 | if (target) | |
8214 | return target; | |
8215 | break; | |
8216 | ||
8217 | case BUILT_IN_ATOMIC_FETCH_XOR_1: | |
8218 | case BUILT_IN_ATOMIC_FETCH_XOR_2: | |
8219 | case BUILT_IN_ATOMIC_FETCH_XOR_4: | |
8220 | case BUILT_IN_ATOMIC_FETCH_XOR_8: | |
8221 | case BUILT_IN_ATOMIC_FETCH_XOR_16: | |
8222 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_XOR_1); | |
8223 | target = expand_builtin_atomic_fetch_op (mode, exp, target, XOR, false, | |
8224 | ignore, BUILT_IN_NONE); | |
8225 | if (target) | |
8226 | return target; | |
8227 | break; | |
8228 | ||
8229 | case BUILT_IN_ATOMIC_FETCH_OR_1: | |
8230 | case BUILT_IN_ATOMIC_FETCH_OR_2: | |
8231 | case BUILT_IN_ATOMIC_FETCH_OR_4: | |
8232 | case BUILT_IN_ATOMIC_FETCH_OR_8: | |
8233 | case BUILT_IN_ATOMIC_FETCH_OR_16: | |
8234 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_OR_1); | |
8235 | target = expand_builtin_atomic_fetch_op (mode, exp, target, IOR, false, | |
8236 | ignore, BUILT_IN_NONE); | |
8237 | if (target) | |
8238 | return target; | |
8239 | break; | |
10b744a3 | 8240 | |
8241 | case BUILT_IN_ATOMIC_TEST_AND_SET: | |
7821cde1 | 8242 | return expand_builtin_atomic_test_and_set (exp, target); |
10b744a3 | 8243 | |
8244 | case BUILT_IN_ATOMIC_CLEAR: | |
8245 | return expand_builtin_atomic_clear (exp); | |
1cd6e20d | 8246 | |
8247 | case BUILT_IN_ATOMIC_ALWAYS_LOCK_FREE: | |
8248 | return expand_builtin_atomic_always_lock_free (exp); | |
8249 | ||
8250 | case BUILT_IN_ATOMIC_IS_LOCK_FREE: | |
8251 | target = expand_builtin_atomic_is_lock_free (exp); | |
8252 | if (target) | |
8253 | return target; | |
8254 | break; | |
8255 | ||
8256 | case BUILT_IN_ATOMIC_THREAD_FENCE: | |
8257 | expand_builtin_atomic_thread_fence (exp); | |
8258 | return const0_rtx; | |
8259 | ||
8260 | case BUILT_IN_ATOMIC_SIGNAL_FENCE: | |
8261 | expand_builtin_atomic_signal_fence (exp); | |
8262 | return const0_rtx; | |
8263 | ||
0a39fd54 | 8264 | case BUILT_IN_OBJECT_SIZE: |
8265 | return expand_builtin_object_size (exp); | |
8266 | ||
8267 | case BUILT_IN_MEMCPY_CHK: | |
8268 | case BUILT_IN_MEMPCPY_CHK: | |
8269 | case BUILT_IN_MEMMOVE_CHK: | |
8270 | case BUILT_IN_MEMSET_CHK: | |
8271 | target = expand_builtin_memory_chk (exp, target, mode, fcode); | |
8272 | if (target) | |
8273 | return target; | |
8274 | break; | |
8275 | ||
8276 | case BUILT_IN_STRCPY_CHK: | |
8277 | case BUILT_IN_STPCPY_CHK: | |
8278 | case BUILT_IN_STRNCPY_CHK: | |
1063acde | 8279 | case BUILT_IN_STPNCPY_CHK: |
0a39fd54 | 8280 | case BUILT_IN_STRCAT_CHK: |
b356dfef | 8281 | case BUILT_IN_STRNCAT_CHK: |
0a39fd54 | 8282 | case BUILT_IN_SNPRINTF_CHK: |
8283 | case BUILT_IN_VSNPRINTF_CHK: | |
8284 | maybe_emit_chk_warning (exp, fcode); | |
8285 | break; | |
8286 | ||
8287 | case BUILT_IN_SPRINTF_CHK: | |
8288 | case BUILT_IN_VSPRINTF_CHK: | |
8289 | maybe_emit_sprintf_chk_warning (exp, fcode); | |
8290 | break; | |
8291 | ||
2c281b15 | 8292 | case BUILT_IN_FREE: |
f74ea1c2 | 8293 | if (warn_free_nonheap_object) |
8294 | maybe_emit_free_warning (exp); | |
2c281b15 | 8295 | break; |
8296 | ||
badaa04c | 8297 | case BUILT_IN_THREAD_POINTER: |
8298 | return expand_builtin_thread_pointer (exp, target); | |
8299 | ||
8300 | case BUILT_IN_SET_THREAD_POINTER: | |
8301 | expand_builtin_set_thread_pointer (exp); | |
8302 | return const0_rtx; | |
8303 | ||
ca4c3545 | 8304 | case BUILT_IN_ACC_ON_DEVICE: |
1ae4e7aa | 8305 | /* Do library call, if we failed to expand the builtin when |
8306 | folding. */ | |
ca4c3545 | 8307 | break; |
8308 | ||
a7babc1e | 8309 | case BUILT_IN_GOACC_PARLEVEL_ID: |
8310 | case BUILT_IN_GOACC_PARLEVEL_SIZE: | |
8311 | return expand_builtin_goacc_parlevel_id_size (exp, target, ignore); | |
8312 | ||
123081ef | 8313 | case BUILT_IN_SPECULATION_SAFE_VALUE_PTR: |
8314 | return expand_speculation_safe_value (VOIDmode, exp, target, ignore); | |
8315 | ||
8316 | case BUILT_IN_SPECULATION_SAFE_VALUE_1: | |
8317 | case BUILT_IN_SPECULATION_SAFE_VALUE_2: | |
8318 | case BUILT_IN_SPECULATION_SAFE_VALUE_4: | |
8319 | case BUILT_IN_SPECULATION_SAFE_VALUE_8: | |
8320 | case BUILT_IN_SPECULATION_SAFE_VALUE_16: | |
8321 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SPECULATION_SAFE_VALUE_1); | |
8322 | return expand_speculation_safe_value (mode, exp, target, ignore); | |
8323 | ||
92482ee0 | 8324 | default: /* just do library call, if unknown builtin */ |
146c1b4f | 8325 | break; |
53800dbe | 8326 | } |
8327 | ||
8328 | /* The switch statement above can drop through to cause the function | |
8329 | to be called normally. */ | |
8330 | return expand_call (exp, target, ignore); | |
8331 | } | |
650e4c94 | 8332 | |
805e22b2 | 8333 | /* Determine whether a tree node represents a call to a built-in |
52203a9d | 8334 | function. If the tree T is a call to a built-in function with |
8335 | the right number of arguments of the appropriate types, return | |
8336 | the DECL_FUNCTION_CODE of the call, e.g. BUILT_IN_SQRT. | |
8337 | Otherwise the return value is END_BUILTINS. */ | |
aecda0d6 | 8338 | |
805e22b2 | 8339 | enum built_in_function |
b7bf20db | 8340 | builtin_mathfn_code (const_tree t) |
805e22b2 | 8341 | { |
b7bf20db | 8342 | const_tree fndecl, arg, parmlist; |
8343 | const_tree argtype, parmtype; | |
8344 | const_call_expr_arg_iterator iter; | |
805e22b2 | 8345 | |
d44e3710 | 8346 | if (TREE_CODE (t) != CALL_EXPR) |
805e22b2 | 8347 | return END_BUILTINS; |
8348 | ||
c6e6ecb1 | 8349 | fndecl = get_callee_fndecl (t); |
a0e9bfbb | 8350 | if (fndecl == NULL_TREE || !fndecl_built_in_p (fndecl, BUILT_IN_NORMAL)) |
8351 | return END_BUILTINS; | |
805e22b2 | 8352 | |
52203a9d | 8353 | parmlist = TYPE_ARG_TYPES (TREE_TYPE (fndecl)); |
b7bf20db | 8354 | init_const_call_expr_arg_iterator (t, &iter); |
52203a9d | 8355 | for (; parmlist; parmlist = TREE_CHAIN (parmlist)) |
e9f80ff5 | 8356 | { |
52203a9d | 8357 | /* If a function doesn't take a variable number of arguments, |
8358 | the last element in the list will have type `void'. */ | |
8359 | parmtype = TREE_VALUE (parmlist); | |
8360 | if (VOID_TYPE_P (parmtype)) | |
8361 | { | |
b7bf20db | 8362 | if (more_const_call_expr_args_p (&iter)) |
52203a9d | 8363 | return END_BUILTINS; |
8364 | return DECL_FUNCTION_CODE (fndecl); | |
8365 | } | |
8366 | ||
b7bf20db | 8367 | if (! more_const_call_expr_args_p (&iter)) |
e9f80ff5 | 8368 | return END_BUILTINS; |
48e1416a | 8369 | |
b7bf20db | 8370 | arg = next_const_call_expr_arg (&iter); |
c2f47e15 | 8371 | argtype = TREE_TYPE (arg); |
52203a9d | 8372 | |
8373 | if (SCALAR_FLOAT_TYPE_P (parmtype)) | |
8374 | { | |
8375 | if (! SCALAR_FLOAT_TYPE_P (argtype)) | |
8376 | return END_BUILTINS; | |
8377 | } | |
8378 | else if (COMPLEX_FLOAT_TYPE_P (parmtype)) | |
8379 | { | |
8380 | if (! COMPLEX_FLOAT_TYPE_P (argtype)) | |
8381 | return END_BUILTINS; | |
8382 | } | |
8383 | else if (POINTER_TYPE_P (parmtype)) | |
8384 | { | |
8385 | if (! POINTER_TYPE_P (argtype)) | |
8386 | return END_BUILTINS; | |
8387 | } | |
8388 | else if (INTEGRAL_TYPE_P (parmtype)) | |
8389 | { | |
8390 | if (! INTEGRAL_TYPE_P (argtype)) | |
8391 | return END_BUILTINS; | |
8392 | } | |
8393 | else | |
e9f80ff5 | 8394 | return END_BUILTINS; |
e9f80ff5 | 8395 | } |
8396 | ||
52203a9d | 8397 | /* Variable-length argument list. */ |
805e22b2 | 8398 | return DECL_FUNCTION_CODE (fndecl); |
8399 | } | |
8400 | ||
c2f47e15 | 8401 | /* Fold a call to __builtin_constant_p, if we know its argument ARG will |
8402 | evaluate to a constant. */ | |
650e4c94 | 8403 | |
8404 | static tree | |
c2f47e15 | 8405 | fold_builtin_constant_p (tree arg) |
650e4c94 | 8406 | { |
650e4c94 | 8407 | /* We return 1 for a numeric type that's known to be a constant |
8408 | value at compile-time or for an aggregate type that's a | |
8409 | literal constant. */ | |
c2f47e15 | 8410 | STRIP_NOPS (arg); |
650e4c94 | 8411 | |
8412 | /* If we know this is a constant, emit the constant of one. */ | |
c2f47e15 | 8413 | if (CONSTANT_CLASS_P (arg) |
8414 | || (TREE_CODE (arg) == CONSTRUCTOR | |
8415 | && TREE_CONSTANT (arg))) | |
650e4c94 | 8416 | return integer_one_node; |
c2f47e15 | 8417 | if (TREE_CODE (arg) == ADDR_EXPR) |
adcfa3a3 | 8418 | { |
c2f47e15 | 8419 | tree op = TREE_OPERAND (arg, 0); |
adcfa3a3 | 8420 | if (TREE_CODE (op) == STRING_CST |
8421 | || (TREE_CODE (op) == ARRAY_REF | |
8422 | && integer_zerop (TREE_OPERAND (op, 1)) | |
8423 | && TREE_CODE (TREE_OPERAND (op, 0)) == STRING_CST)) | |
8424 | return integer_one_node; | |
8425 | } | |
650e4c94 | 8426 | |
1fb4300c | 8427 | /* If this expression has side effects, show we don't know it to be a |
8428 | constant. Likewise if it's a pointer or aggregate type since in | |
8429 | those case we only want literals, since those are only optimized | |
f97c71a1 | 8430 | when generating RTL, not later. |
8431 | And finally, if we are compiling an initializer, not code, we | |
8432 | need to return a definite result now; there's not going to be any | |
8433 | more optimization done. */ | |
c2f47e15 | 8434 | if (TREE_SIDE_EFFECTS (arg) |
8435 | || AGGREGATE_TYPE_P (TREE_TYPE (arg)) | |
8436 | || POINTER_TYPE_P (TREE_TYPE (arg)) | |
47be647d | 8437 | || cfun == 0 |
0b049e15 | 8438 | || folding_initializer |
8439 | || force_folding_builtin_constant_p) | |
650e4c94 | 8440 | return integer_zero_node; |
8441 | ||
c2f47e15 | 8442 | return NULL_TREE; |
650e4c94 | 8443 | } |
8444 | ||
01107f42 | 8445 | /* Create builtin_expect or builtin_expect_with_probability |
8446 | with PRED and EXPECTED as its arguments and return it as a truthvalue. | |
8447 | Fortran FE can also produce builtin_expect with PREDICTOR as third argument. | |
8448 | builtin_expect_with_probability instead uses third argument as PROBABILITY | |
8449 | value. */ | |
4ee9c684 | 8450 | |
8451 | static tree | |
c83059be | 8452 | build_builtin_expect_predicate (location_t loc, tree pred, tree expected, |
01107f42 | 8453 | tree predictor, tree probability) |
4ee9c684 | 8454 | { |
76f5a783 | 8455 | tree fn, arg_types, pred_type, expected_type, call_expr, ret_type; |
4ee9c684 | 8456 | |
01107f42 | 8457 | fn = builtin_decl_explicit (probability == NULL_TREE ? BUILT_IN_EXPECT |
8458 | : BUILT_IN_EXPECT_WITH_PROBABILITY); | |
76f5a783 | 8459 | arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn)); |
8460 | ret_type = TREE_TYPE (TREE_TYPE (fn)); | |
8461 | pred_type = TREE_VALUE (arg_types); | |
8462 | expected_type = TREE_VALUE (TREE_CHAIN (arg_types)); | |
8463 | ||
389dd41b | 8464 | pred = fold_convert_loc (loc, pred_type, pred); |
8465 | expected = fold_convert_loc (loc, expected_type, expected); | |
01107f42 | 8466 | |
8467 | if (probability) | |
8468 | call_expr = build_call_expr_loc (loc, fn, 3, pred, expected, probability); | |
8469 | else | |
8470 | call_expr = build_call_expr_loc (loc, fn, predictor ? 3 : 2, pred, expected, | |
8471 | predictor); | |
76f5a783 | 8472 | |
8473 | return build2 (NE_EXPR, TREE_TYPE (pred), call_expr, | |
8474 | build_int_cst (ret_type, 0)); | |
8475 | } | |
8476 | ||
01107f42 | 8477 | /* Fold a call to builtin_expect with arguments ARG0, ARG1, ARG2, ARG3. Return |
76f5a783 | 8478 | NULL_TREE if no simplification is possible. */ |
8479 | ||
c83059be | 8480 | tree |
01107f42 | 8481 | fold_builtin_expect (location_t loc, tree arg0, tree arg1, tree arg2, |
8482 | tree arg3) | |
76f5a783 | 8483 | { |
083bada9 | 8484 | tree inner, fndecl, inner_arg0; |
76f5a783 | 8485 | enum tree_code code; |
8486 | ||
083bada9 | 8487 | /* Distribute the expected value over short-circuiting operators. |
8488 | See through the cast from truthvalue_type_node to long. */ | |
8489 | inner_arg0 = arg0; | |
d09ef31a | 8490 | while (CONVERT_EXPR_P (inner_arg0) |
083bada9 | 8491 | && INTEGRAL_TYPE_P (TREE_TYPE (inner_arg0)) |
8492 | && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (inner_arg0, 0)))) | |
8493 | inner_arg0 = TREE_OPERAND (inner_arg0, 0); | |
8494 | ||
76f5a783 | 8495 | /* If this is a builtin_expect within a builtin_expect keep the |
8496 | inner one. See through a comparison against a constant. It | |
8497 | might have been added to create a thruthvalue. */ | |
083bada9 | 8498 | inner = inner_arg0; |
8499 | ||
76f5a783 | 8500 | if (COMPARISON_CLASS_P (inner) |
8501 | && TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST) | |
8502 | inner = TREE_OPERAND (inner, 0); | |
8503 | ||
8504 | if (TREE_CODE (inner) == CALL_EXPR | |
8505 | && (fndecl = get_callee_fndecl (inner)) | |
a0e9bfbb | 8506 | && (fndecl_built_in_p (fndecl, BUILT_IN_EXPECT) |
8507 | || fndecl_built_in_p (fndecl, BUILT_IN_EXPECT_WITH_PROBABILITY))) | |
76f5a783 | 8508 | return arg0; |
8509 | ||
083bada9 | 8510 | inner = inner_arg0; |
76f5a783 | 8511 | code = TREE_CODE (inner); |
8512 | if (code == TRUTH_ANDIF_EXPR || code == TRUTH_ORIF_EXPR) | |
8513 | { | |
8514 | tree op0 = TREE_OPERAND (inner, 0); | |
8515 | tree op1 = TREE_OPERAND (inner, 1); | |
2f2a7720 | 8516 | arg1 = save_expr (arg1); |
76f5a783 | 8517 | |
01107f42 | 8518 | op0 = build_builtin_expect_predicate (loc, op0, arg1, arg2, arg3); |
8519 | op1 = build_builtin_expect_predicate (loc, op1, arg1, arg2, arg3); | |
76f5a783 | 8520 | inner = build2 (code, TREE_TYPE (inner), op0, op1); |
8521 | ||
389dd41b | 8522 | return fold_convert_loc (loc, TREE_TYPE (arg0), inner); |
76f5a783 | 8523 | } |
8524 | ||
8525 | /* If the argument isn't invariant then there's nothing else we can do. */ | |
083bada9 | 8526 | if (!TREE_CONSTANT (inner_arg0)) |
c2f47e15 | 8527 | return NULL_TREE; |
4ee9c684 | 8528 | |
76f5a783 | 8529 | /* If we expect that a comparison against the argument will fold to |
8530 | a constant return the constant. In practice, this means a true | |
8531 | constant or the address of a non-weak symbol. */ | |
083bada9 | 8532 | inner = inner_arg0; |
4ee9c684 | 8533 | STRIP_NOPS (inner); |
8534 | if (TREE_CODE (inner) == ADDR_EXPR) | |
8535 | { | |
8536 | do | |
8537 | { | |
8538 | inner = TREE_OPERAND (inner, 0); | |
8539 | } | |
8540 | while (TREE_CODE (inner) == COMPONENT_REF | |
8541 | || TREE_CODE (inner) == ARRAY_REF); | |
53e9c5c4 | 8542 | if (VAR_OR_FUNCTION_DECL_P (inner) && DECL_WEAK (inner)) |
c2f47e15 | 8543 | return NULL_TREE; |
4ee9c684 | 8544 | } |
8545 | ||
76f5a783 | 8546 | /* Otherwise, ARG0 already has the proper type for the return value. */ |
8547 | return arg0; | |
4ee9c684 | 8548 | } |
8549 | ||
c2f47e15 | 8550 | /* Fold a call to __builtin_classify_type with argument ARG. */ |
27d0c333 | 8551 | |
539a3a92 | 8552 | static tree |
c2f47e15 | 8553 | fold_builtin_classify_type (tree arg) |
539a3a92 | 8554 | { |
c2f47e15 | 8555 | if (arg == 0) |
7002a1c8 | 8556 | return build_int_cst (integer_type_node, no_type_class); |
539a3a92 | 8557 | |
7002a1c8 | 8558 | return build_int_cst (integer_type_node, type_to_class (TREE_TYPE (arg))); |
539a3a92 | 8559 | } |
8560 | ||
c2f47e15 | 8561 | /* Fold a call to __builtin_strlen with argument ARG. */ |
e6e27594 | 8562 | |
8563 | static tree | |
c7cbde74 | 8564 | fold_builtin_strlen (location_t loc, tree type, tree arg) |
e6e27594 | 8565 | { |
c2f47e15 | 8566 | if (!validate_arg (arg, POINTER_TYPE)) |
e6e27594 | 8567 | return NULL_TREE; |
8568 | else | |
8569 | { | |
2b84b289 | 8570 | c_strlen_data data; |
8571 | memset (&data, 0, sizeof (c_strlen_data)); | |
8572 | tree len = c_strlen (arg, 0, &data); | |
e6e27594 | 8573 | |
8574 | if (len) | |
c7cbde74 | 8575 | return fold_convert_loc (loc, type, len); |
e6e27594 | 8576 | |
2b84b289 | 8577 | if (!data.decl) |
8578 | c_strlen (arg, 1, &data); | |
7af57b1c | 8579 | |
2b84b289 | 8580 | if (data.decl) |
7af57b1c | 8581 | { |
8582 | if (EXPR_HAS_LOCATION (arg)) | |
8583 | loc = EXPR_LOCATION (arg); | |
8584 | else if (loc == UNKNOWN_LOCATION) | |
8585 | loc = input_location; | |
2b84b289 | 8586 | warn_string_no_nul (loc, "strlen", arg, data.decl); |
7af57b1c | 8587 | } |
8588 | ||
e6e27594 | 8589 | return NULL_TREE; |
8590 | } | |
8591 | } | |
8592 | ||
92c43e3c | 8593 | /* Fold a call to __builtin_inf or __builtin_huge_val. */ |
8594 | ||
8595 | static tree | |
389dd41b | 8596 | fold_builtin_inf (location_t loc, tree type, int warn) |
92c43e3c | 8597 | { |
aa870c1b | 8598 | REAL_VALUE_TYPE real; |
8599 | ||
40f4dbd5 | 8600 | /* __builtin_inff is intended to be usable to define INFINITY on all |
8601 | targets. If an infinity is not available, INFINITY expands "to a | |
8602 | positive constant of type float that overflows at translation | |
8603 | time", footnote "In this case, using INFINITY will violate the | |
8604 | constraint in 6.4.4 and thus require a diagnostic." (C99 7.12#4). | |
8605 | Thus we pedwarn to ensure this constraint violation is | |
8606 | diagnosed. */ | |
92c43e3c | 8607 | if (!MODE_HAS_INFINITIES (TYPE_MODE (type)) && warn) |
389dd41b | 8608 | pedwarn (loc, 0, "target format does not support infinity"); |
92c43e3c | 8609 | |
aa870c1b | 8610 | real_inf (&real); |
8611 | return build_real (type, real); | |
92c43e3c | 8612 | } |
8613 | ||
d735c391 | 8614 | /* Fold function call to builtin sincos, sincosf, or sincosl. Return |
8615 | NULL_TREE if no simplification can be made. */ | |
8616 | ||
8617 | static tree | |
389dd41b | 8618 | fold_builtin_sincos (location_t loc, |
8619 | tree arg0, tree arg1, tree arg2) | |
d735c391 | 8620 | { |
c2f47e15 | 8621 | tree type; |
6c21be92 | 8622 | tree fndecl, call = NULL_TREE; |
d735c391 | 8623 | |
c2f47e15 | 8624 | if (!validate_arg (arg0, REAL_TYPE) |
8625 | || !validate_arg (arg1, POINTER_TYPE) | |
8626 | || !validate_arg (arg2, POINTER_TYPE)) | |
d735c391 | 8627 | return NULL_TREE; |
8628 | ||
d735c391 | 8629 | type = TREE_TYPE (arg0); |
d735c391 | 8630 | |
8631 | /* Calculate the result when the argument is a constant. */ | |
e3240774 | 8632 | built_in_function fn = mathfn_built_in_2 (type, CFN_BUILT_IN_CEXPI); |
6c21be92 | 8633 | if (fn == END_BUILTINS) |
d735c391 | 8634 | return NULL_TREE; |
8635 | ||
6c21be92 | 8636 | /* Canonicalize sincos to cexpi. */ |
8637 | if (TREE_CODE (arg0) == REAL_CST) | |
8638 | { | |
8639 | tree complex_type = build_complex_type (type); | |
744fe358 | 8640 | call = fold_const_call (as_combined_fn (fn), complex_type, arg0); |
6c21be92 | 8641 | } |
8642 | if (!call) | |
8643 | { | |
8644 | if (!targetm.libc_has_function (function_c99_math_complex) | |
8645 | || !builtin_decl_implicit_p (fn)) | |
8646 | return NULL_TREE; | |
8647 | fndecl = builtin_decl_explicit (fn); | |
8648 | call = build_call_expr_loc (loc, fndecl, 1, arg0); | |
8649 | call = builtin_save_expr (call); | |
8650 | } | |
d735c391 | 8651 | |
8234e9d3 | 8652 | tree ptype = build_pointer_type (type); |
8653 | arg1 = fold_convert (ptype, arg1); | |
8654 | arg2 = fold_convert (ptype, arg2); | |
a75b1c71 | 8655 | return build2 (COMPOUND_EXPR, void_type_node, |
d735c391 | 8656 | build2 (MODIFY_EXPR, void_type_node, |
389dd41b | 8657 | build_fold_indirect_ref_loc (loc, arg1), |
6c21be92 | 8658 | fold_build1_loc (loc, IMAGPART_EXPR, type, call)), |
d735c391 | 8659 | build2 (MODIFY_EXPR, void_type_node, |
389dd41b | 8660 | build_fold_indirect_ref_loc (loc, arg2), |
6c21be92 | 8661 | fold_build1_loc (loc, REALPART_EXPR, type, call))); |
d735c391 | 8662 | } |
8663 | ||
c2f47e15 | 8664 | /* Fold function call to builtin memcmp with arguments ARG1 and ARG2. |
8665 | Return NULL_TREE if no simplification can be made. */ | |
9c8a1629 | 8666 | |
8667 | static tree | |
389dd41b | 8668 | fold_builtin_memcmp (location_t loc, tree arg1, tree arg2, tree len) |
9c8a1629 | 8669 | { |
c2f47e15 | 8670 | if (!validate_arg (arg1, POINTER_TYPE) |
8671 | || !validate_arg (arg2, POINTER_TYPE) | |
8672 | || !validate_arg (len, INTEGER_TYPE)) | |
8673 | return NULL_TREE; | |
9c8a1629 | 8674 | |
8675 | /* If the LEN parameter is zero, return zero. */ | |
8676 | if (integer_zerop (len)) | |
389dd41b | 8677 | return omit_two_operands_loc (loc, integer_type_node, integer_zero_node, |
c4fef134 | 8678 | arg1, arg2); |
9c8a1629 | 8679 | |
8680 | /* If ARG1 and ARG2 are the same (and not volatile), return zero. */ | |
8681 | if (operand_equal_p (arg1, arg2, 0)) | |
389dd41b | 8682 | return omit_one_operand_loc (loc, integer_type_node, integer_zero_node, len); |
c4fef134 | 8683 | |
c4fef134 | 8684 | /* If len parameter is one, return an expression corresponding to |
8685 | (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */ | |
e913b5cd | 8686 | if (tree_fits_uhwi_p (len) && tree_to_uhwi (len) == 1) |
c4fef134 | 8687 | { |
8688 | tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0); | |
4f1b71c0 | 8689 | tree cst_uchar_ptr_node |
8690 | = build_pointer_type_for_mode (cst_uchar_node, ptr_mode, true); | |
8691 | ||
389dd41b | 8692 | tree ind1 |
8693 | = fold_convert_loc (loc, integer_type_node, | |
8694 | build1 (INDIRECT_REF, cst_uchar_node, | |
8695 | fold_convert_loc (loc, | |
8696 | cst_uchar_ptr_node, | |
c4fef134 | 8697 | arg1))); |
389dd41b | 8698 | tree ind2 |
8699 | = fold_convert_loc (loc, integer_type_node, | |
8700 | build1 (INDIRECT_REF, cst_uchar_node, | |
8701 | fold_convert_loc (loc, | |
8702 | cst_uchar_ptr_node, | |
c4fef134 | 8703 | arg2))); |
389dd41b | 8704 | return fold_build2_loc (loc, MINUS_EXPR, integer_type_node, ind1, ind2); |
c4fef134 | 8705 | } |
9c8a1629 | 8706 | |
c2f47e15 | 8707 | return NULL_TREE; |
9c8a1629 | 8708 | } |
8709 | ||
c2f47e15 | 8710 | /* Fold a call to builtin isascii with argument ARG. */ |
d49367d4 | 8711 | |
8712 | static tree | |
389dd41b | 8713 | fold_builtin_isascii (location_t loc, tree arg) |
d49367d4 | 8714 | { |
c2f47e15 | 8715 | if (!validate_arg (arg, INTEGER_TYPE)) |
8716 | return NULL_TREE; | |
d49367d4 | 8717 | else |
8718 | { | |
8719 | /* Transform isascii(c) -> ((c & ~0x7f) == 0). */ | |
c90b5d40 | 8720 | arg = fold_build2 (BIT_AND_EXPR, integer_type_node, arg, |
7002a1c8 | 8721 | build_int_cst (integer_type_node, |
c90b5d40 | 8722 | ~ (unsigned HOST_WIDE_INT) 0x7f)); |
389dd41b | 8723 | return fold_build2_loc (loc, EQ_EXPR, integer_type_node, |
7002a1c8 | 8724 | arg, integer_zero_node); |
d49367d4 | 8725 | } |
8726 | } | |
8727 | ||
c2f47e15 | 8728 | /* Fold a call to builtin toascii with argument ARG. */ |
d49367d4 | 8729 | |
8730 | static tree | |
389dd41b | 8731 | fold_builtin_toascii (location_t loc, tree arg) |
d49367d4 | 8732 | { |
c2f47e15 | 8733 | if (!validate_arg (arg, INTEGER_TYPE)) |
8734 | return NULL_TREE; | |
48e1416a | 8735 | |
c2f47e15 | 8736 | /* Transform toascii(c) -> (c & 0x7f). */ |
389dd41b | 8737 | return fold_build2_loc (loc, BIT_AND_EXPR, integer_type_node, arg, |
7002a1c8 | 8738 | build_int_cst (integer_type_node, 0x7f)); |
d49367d4 | 8739 | } |
8740 | ||
c2f47e15 | 8741 | /* Fold a call to builtin isdigit with argument ARG. */ |
df1cf42e | 8742 | |
8743 | static tree | |
389dd41b | 8744 | fold_builtin_isdigit (location_t loc, tree arg) |
df1cf42e | 8745 | { |
c2f47e15 | 8746 | if (!validate_arg (arg, INTEGER_TYPE)) |
8747 | return NULL_TREE; | |
df1cf42e | 8748 | else |
8749 | { | |
8750 | /* Transform isdigit(c) -> (unsigned)(c) - '0' <= 9. */ | |
624d37a6 | 8751 | /* According to the C standard, isdigit is unaffected by locale. |
8752 | However, it definitely is affected by the target character set. */ | |
624d37a6 | 8753 | unsigned HOST_WIDE_INT target_digit0 |
8754 | = lang_hooks.to_target_charset ('0'); | |
8755 | ||
8756 | if (target_digit0 == 0) | |
8757 | return NULL_TREE; | |
8758 | ||
389dd41b | 8759 | arg = fold_convert_loc (loc, unsigned_type_node, arg); |
c90b5d40 | 8760 | arg = fold_build2 (MINUS_EXPR, unsigned_type_node, arg, |
8761 | build_int_cst (unsigned_type_node, target_digit0)); | |
389dd41b | 8762 | return fold_build2_loc (loc, LE_EXPR, integer_type_node, arg, |
f2532264 | 8763 | build_int_cst (unsigned_type_node, 9)); |
df1cf42e | 8764 | } |
8765 | } | |
27f261ef | 8766 | |
c2f47e15 | 8767 | /* Fold a call to fabs, fabsf or fabsl with argument ARG. */ |
d1aade50 | 8768 | |
8769 | static tree | |
389dd41b | 8770 | fold_builtin_fabs (location_t loc, tree arg, tree type) |
d1aade50 | 8771 | { |
c2f47e15 | 8772 | if (!validate_arg (arg, REAL_TYPE)) |
8773 | return NULL_TREE; | |
d1aade50 | 8774 | |
389dd41b | 8775 | arg = fold_convert_loc (loc, type, arg); |
389dd41b | 8776 | return fold_build1_loc (loc, ABS_EXPR, type, arg); |
d1aade50 | 8777 | } |
8778 | ||
c2f47e15 | 8779 | /* Fold a call to abs, labs, llabs or imaxabs with argument ARG. */ |
d1aade50 | 8780 | |
8781 | static tree | |
389dd41b | 8782 | fold_builtin_abs (location_t loc, tree arg, tree type) |
d1aade50 | 8783 | { |
c2f47e15 | 8784 | if (!validate_arg (arg, INTEGER_TYPE)) |
8785 | return NULL_TREE; | |
d1aade50 | 8786 | |
389dd41b | 8787 | arg = fold_convert_loc (loc, type, arg); |
389dd41b | 8788 | return fold_build1_loc (loc, ABS_EXPR, type, arg); |
d1aade50 | 8789 | } |
8790 | ||
abe4dcf6 | 8791 | /* Fold a call to builtin carg(a+bi) -> atan2(b,a). */ |
8792 | ||
8793 | static tree | |
389dd41b | 8794 | fold_builtin_carg (location_t loc, tree arg, tree type) |
abe4dcf6 | 8795 | { |
239d491a | 8796 | if (validate_arg (arg, COMPLEX_TYPE) |
8797 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg))) == REAL_TYPE) | |
abe4dcf6 | 8798 | { |
8799 | tree atan2_fn = mathfn_built_in (type, BUILT_IN_ATAN2); | |
48e1416a | 8800 | |
abe4dcf6 | 8801 | if (atan2_fn) |
8802 | { | |
c2f47e15 | 8803 | tree new_arg = builtin_save_expr (arg); |
389dd41b | 8804 | tree r_arg = fold_build1_loc (loc, REALPART_EXPR, type, new_arg); |
8805 | tree i_arg = fold_build1_loc (loc, IMAGPART_EXPR, type, new_arg); | |
8806 | return build_call_expr_loc (loc, atan2_fn, 2, i_arg, r_arg); | |
abe4dcf6 | 8807 | } |
8808 | } | |
48e1416a | 8809 | |
abe4dcf6 | 8810 | return NULL_TREE; |
8811 | } | |
8812 | ||
3838b9ae | 8813 | /* Fold a call to builtin frexp, we can assume the base is 2. */ |
8814 | ||
8815 | static tree | |
389dd41b | 8816 | fold_builtin_frexp (location_t loc, tree arg0, tree arg1, tree rettype) |
3838b9ae | 8817 | { |
8818 | if (! validate_arg (arg0, REAL_TYPE) || ! validate_arg (arg1, POINTER_TYPE)) | |
8819 | return NULL_TREE; | |
48e1416a | 8820 | |
3838b9ae | 8821 | STRIP_NOPS (arg0); |
48e1416a | 8822 | |
3838b9ae | 8823 | if (!(TREE_CODE (arg0) == REAL_CST && ! TREE_OVERFLOW (arg0))) |
8824 | return NULL_TREE; | |
48e1416a | 8825 | |
389dd41b | 8826 | arg1 = build_fold_indirect_ref_loc (loc, arg1); |
3838b9ae | 8827 | |
8828 | /* Proceed if a valid pointer type was passed in. */ | |
8829 | if (TYPE_MAIN_VARIANT (TREE_TYPE (arg1)) == integer_type_node) | |
8830 | { | |
8831 | const REAL_VALUE_TYPE *const value = TREE_REAL_CST_PTR (arg0); | |
8832 | tree frac, exp; | |
48e1416a | 8833 | |
3838b9ae | 8834 | switch (value->cl) |
8835 | { | |
8836 | case rvc_zero: | |
8837 | /* For +-0, return (*exp = 0, +-0). */ | |
8838 | exp = integer_zero_node; | |
8839 | frac = arg0; | |
8840 | break; | |
8841 | case rvc_nan: | |
8842 | case rvc_inf: | |
8843 | /* For +-NaN or +-Inf, *exp is unspecified, return arg0. */ | |
389dd41b | 8844 | return omit_one_operand_loc (loc, rettype, arg0, arg1); |
3838b9ae | 8845 | case rvc_normal: |
8846 | { | |
8847 | /* Since the frexp function always expects base 2, and in | |
8848 | GCC normalized significands are already in the range | |
8849 | [0.5, 1.0), we have exactly what frexp wants. */ | |
8850 | REAL_VALUE_TYPE frac_rvt = *value; | |
8851 | SET_REAL_EXP (&frac_rvt, 0); | |
8852 | frac = build_real (rettype, frac_rvt); | |
7002a1c8 | 8853 | exp = build_int_cst (integer_type_node, REAL_EXP (value)); |
3838b9ae | 8854 | } |
8855 | break; | |
8856 | default: | |
8857 | gcc_unreachable (); | |
8858 | } | |
48e1416a | 8859 | |
3838b9ae | 8860 | /* Create the COMPOUND_EXPR (*arg1 = trunc, frac). */ |
389dd41b | 8861 | arg1 = fold_build2_loc (loc, MODIFY_EXPR, rettype, arg1, exp); |
3838b9ae | 8862 | TREE_SIDE_EFFECTS (arg1) = 1; |
389dd41b | 8863 | return fold_build2_loc (loc, COMPOUND_EXPR, rettype, arg1, frac); |
3838b9ae | 8864 | } |
8865 | ||
8866 | return NULL_TREE; | |
8867 | } | |
8868 | ||
ebf8b4f5 | 8869 | /* Fold a call to builtin modf. */ |
8870 | ||
8871 | static tree | |
389dd41b | 8872 | fold_builtin_modf (location_t loc, tree arg0, tree arg1, tree rettype) |
ebf8b4f5 | 8873 | { |
8874 | if (! validate_arg (arg0, REAL_TYPE) || ! validate_arg (arg1, POINTER_TYPE)) | |
8875 | return NULL_TREE; | |
48e1416a | 8876 | |
ebf8b4f5 | 8877 | STRIP_NOPS (arg0); |
48e1416a | 8878 | |
ebf8b4f5 | 8879 | if (!(TREE_CODE (arg0) == REAL_CST && ! TREE_OVERFLOW (arg0))) |
8880 | return NULL_TREE; | |
48e1416a | 8881 | |
389dd41b | 8882 | arg1 = build_fold_indirect_ref_loc (loc, arg1); |
ebf8b4f5 | 8883 | |
8884 | /* Proceed if a valid pointer type was passed in. */ | |
8885 | if (TYPE_MAIN_VARIANT (TREE_TYPE (arg1)) == TYPE_MAIN_VARIANT (rettype)) | |
8886 | { | |
8887 | const REAL_VALUE_TYPE *const value = TREE_REAL_CST_PTR (arg0); | |
8888 | REAL_VALUE_TYPE trunc, frac; | |
8889 | ||
8890 | switch (value->cl) | |
8891 | { | |
8892 | case rvc_nan: | |
8893 | case rvc_zero: | |
8894 | /* For +-NaN or +-0, return (*arg1 = arg0, arg0). */ | |
8895 | trunc = frac = *value; | |
8896 | break; | |
8897 | case rvc_inf: | |
8898 | /* For +-Inf, return (*arg1 = arg0, +-0). */ | |
8899 | frac = dconst0; | |
8900 | frac.sign = value->sign; | |
8901 | trunc = *value; | |
8902 | break; | |
8903 | case rvc_normal: | |
8904 | /* Return (*arg1 = trunc(arg0), arg0-trunc(arg0)). */ | |
8905 | real_trunc (&trunc, VOIDmode, value); | |
8906 | real_arithmetic (&frac, MINUS_EXPR, value, &trunc); | |
8907 | /* If the original number was negative and already | |
8908 | integral, then the fractional part is -0.0. */ | |
8909 | if (value->sign && frac.cl == rvc_zero) | |
8910 | frac.sign = value->sign; | |
8911 | break; | |
8912 | } | |
48e1416a | 8913 | |
ebf8b4f5 | 8914 | /* Create the COMPOUND_EXPR (*arg1 = trunc, frac). */ |
389dd41b | 8915 | arg1 = fold_build2_loc (loc, MODIFY_EXPR, rettype, arg1, |
ebf8b4f5 | 8916 | build_real (rettype, trunc)); |
8917 | TREE_SIDE_EFFECTS (arg1) = 1; | |
389dd41b | 8918 | return fold_build2_loc (loc, COMPOUND_EXPR, rettype, arg1, |
ebf8b4f5 | 8919 | build_real (rettype, frac)); |
8920 | } | |
48e1416a | 8921 | |
ebf8b4f5 | 8922 | return NULL_TREE; |
8923 | } | |
8924 | ||
12f08300 | 8925 | /* Given a location LOC, an interclass builtin function decl FNDECL |
8926 | and its single argument ARG, return an folded expression computing | |
8927 | the same, or NULL_TREE if we either couldn't or didn't want to fold | |
8928 | (the latter happen if there's an RTL instruction available). */ | |
8929 | ||
8930 | static tree | |
8931 | fold_builtin_interclass_mathfn (location_t loc, tree fndecl, tree arg) | |
8932 | { | |
8933 | machine_mode mode; | |
8934 | ||
8935 | if (!validate_arg (arg, REAL_TYPE)) | |
8936 | return NULL_TREE; | |
8937 | ||
8938 | if (interclass_mathfn_icode (arg, fndecl) != CODE_FOR_nothing) | |
8939 | return NULL_TREE; | |
8940 | ||
8941 | mode = TYPE_MODE (TREE_TYPE (arg)); | |
8942 | ||
8943 | bool is_ibm_extended = MODE_COMPOSITE_P (mode); | |
7f38718f | 8944 | |
12f08300 | 8945 | /* If there is no optab, try generic code. */ |
8946 | switch (DECL_FUNCTION_CODE (fndecl)) | |
8947 | { | |
8948 | tree result; | |
a65c4d64 | 8949 | |
12f08300 | 8950 | CASE_FLT_FN (BUILT_IN_ISINF): |
8951 | { | |
8952 | /* isinf(x) -> isgreater(fabs(x),DBL_MAX). */ | |
8953 | tree const isgr_fn = builtin_decl_explicit (BUILT_IN_ISGREATER); | |
8954 | tree type = TREE_TYPE (arg); | |
8955 | REAL_VALUE_TYPE r; | |
8956 | char buf[128]; | |
8957 | ||
8958 | if (is_ibm_extended) | |
8959 | { | |
8960 | /* NaN and Inf are encoded in the high-order double value | |
8961 | only. The low-order value is not significant. */ | |
8962 | type = double_type_node; | |
8963 | mode = DFmode; | |
8964 | arg = fold_build1_loc (loc, NOP_EXPR, type, arg); | |
8965 | } | |
8966 | get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf)); | |
8967 | real_from_string (&r, buf); | |
8968 | result = build_call_expr (isgr_fn, 2, | |
8969 | fold_build1_loc (loc, ABS_EXPR, type, arg), | |
8970 | build_real (type, r)); | |
8971 | return result; | |
8972 | } | |
8973 | CASE_FLT_FN (BUILT_IN_FINITE): | |
8974 | case BUILT_IN_ISFINITE: | |
8975 | { | |
8976 | /* isfinite(x) -> islessequal(fabs(x),DBL_MAX). */ | |
8977 | tree const isle_fn = builtin_decl_explicit (BUILT_IN_ISLESSEQUAL); | |
8978 | tree type = TREE_TYPE (arg); | |
8979 | REAL_VALUE_TYPE r; | |
8980 | char buf[128]; | |
8981 | ||
8982 | if (is_ibm_extended) | |
8983 | { | |
8984 | /* NaN and Inf are encoded in the high-order double value | |
8985 | only. The low-order value is not significant. */ | |
8986 | type = double_type_node; | |
8987 | mode = DFmode; | |
8988 | arg = fold_build1_loc (loc, NOP_EXPR, type, arg); | |
8989 | } | |
8990 | get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf)); | |
8991 | real_from_string (&r, buf); | |
8992 | result = build_call_expr (isle_fn, 2, | |
8993 | fold_build1_loc (loc, ABS_EXPR, type, arg), | |
8994 | build_real (type, r)); | |
8995 | /*result = fold_build2_loc (loc, UNGT_EXPR, | |
8996 | TREE_TYPE (TREE_TYPE (fndecl)), | |
8997 | fold_build1_loc (loc, ABS_EXPR, type, arg), | |
8998 | build_real (type, r)); | |
8999 | result = fold_build1_loc (loc, TRUTH_NOT_EXPR, | |
9000 | TREE_TYPE (TREE_TYPE (fndecl)), | |
9001 | result);*/ | |
9002 | return result; | |
9003 | } | |
9004 | case BUILT_IN_ISNORMAL: | |
9005 | { | |
9006 | /* isnormal(x) -> isgreaterequal(fabs(x),DBL_MIN) & | |
9007 | islessequal(fabs(x),DBL_MAX). */ | |
9008 | tree const isle_fn = builtin_decl_explicit (BUILT_IN_ISLESSEQUAL); | |
9009 | tree type = TREE_TYPE (arg); | |
9010 | tree orig_arg, max_exp, min_exp; | |
9011 | machine_mode orig_mode = mode; | |
9012 | REAL_VALUE_TYPE rmax, rmin; | |
9013 | char buf[128]; | |
9014 | ||
9015 | orig_arg = arg = builtin_save_expr (arg); | |
9016 | if (is_ibm_extended) | |
9017 | { | |
9018 | /* Use double to test the normal range of IBM extended | |
9019 | precision. Emin for IBM extended precision is | |
9020 | different to emin for IEEE double, being 53 higher | |
9021 | since the low double exponent is at least 53 lower | |
9022 | than the high double exponent. */ | |
9023 | type = double_type_node; | |
9024 | mode = DFmode; | |
9025 | arg = fold_build1_loc (loc, NOP_EXPR, type, arg); | |
9026 | } | |
9027 | arg = fold_build1_loc (loc, ABS_EXPR, type, arg); | |
9028 | ||
9029 | get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf)); | |
9030 | real_from_string (&rmax, buf); | |
9031 | sprintf (buf, "0x1p%d", REAL_MODE_FORMAT (orig_mode)->emin - 1); | |
9032 | real_from_string (&rmin, buf); | |
9033 | max_exp = build_real (type, rmax); | |
9034 | min_exp = build_real (type, rmin); | |
9035 | ||
9036 | max_exp = build_call_expr (isle_fn, 2, arg, max_exp); | |
9037 | if (is_ibm_extended) | |
9038 | { | |
9039 | /* Testing the high end of the range is done just using | |
9040 | the high double, using the same test as isfinite(). | |
9041 | For the subnormal end of the range we first test the | |
9042 | high double, then if its magnitude is equal to the | |
9043 | limit of 0x1p-969, we test whether the low double is | |
9044 | non-zero and opposite sign to the high double. */ | |
9045 | tree const islt_fn = builtin_decl_explicit (BUILT_IN_ISLESS); | |
9046 | tree const isgt_fn = builtin_decl_explicit (BUILT_IN_ISGREATER); | |
9047 | tree gt_min = build_call_expr (isgt_fn, 2, arg, min_exp); | |
9048 | tree eq_min = fold_build2 (EQ_EXPR, integer_type_node, | |
9049 | arg, min_exp); | |
9050 | tree as_complex = build1 (VIEW_CONVERT_EXPR, | |
9051 | complex_double_type_node, orig_arg); | |
9052 | tree hi_dbl = build1 (REALPART_EXPR, type, as_complex); | |
9053 | tree lo_dbl = build1 (IMAGPART_EXPR, type, as_complex); | |
9054 | tree zero = build_real (type, dconst0); | |
9055 | tree hilt = build_call_expr (islt_fn, 2, hi_dbl, zero); | |
9056 | tree lolt = build_call_expr (islt_fn, 2, lo_dbl, zero); | |
9057 | tree logt = build_call_expr (isgt_fn, 2, lo_dbl, zero); | |
9058 | tree ok_lo = fold_build1 (TRUTH_NOT_EXPR, integer_type_node, | |
9059 | fold_build3 (COND_EXPR, | |
9060 | integer_type_node, | |
9061 | hilt, logt, lolt)); | |
9062 | eq_min = fold_build2 (TRUTH_ANDIF_EXPR, integer_type_node, | |
9063 | eq_min, ok_lo); | |
9064 | min_exp = fold_build2 (TRUTH_ORIF_EXPR, integer_type_node, | |
9065 | gt_min, eq_min); | |
9066 | } | |
9067 | else | |
9068 | { | |
9069 | tree const isge_fn | |
9070 | = builtin_decl_explicit (BUILT_IN_ISGREATEREQUAL); | |
9071 | min_exp = build_call_expr (isge_fn, 2, arg, min_exp); | |
9072 | } | |
9073 | result = fold_build2 (BIT_AND_EXPR, integer_type_node, | |
9074 | max_exp, min_exp); | |
9075 | return result; | |
9076 | } | |
9077 | default: | |
9078 | break; | |
9079 | } | |
9080 | ||
9081 | return NULL_TREE; | |
9082 | } | |
9083 | ||
9084 | /* Fold a call to __builtin_isnan(), __builtin_isinf, __builtin_finite. | |
c2f47e15 | 9085 | ARG is the argument for the call. */ |
726069ba | 9086 | |
9087 | static tree | |
12f08300 | 9088 | fold_builtin_classify (location_t loc, tree fndecl, tree arg, int builtin_index) |
726069ba | 9089 | { |
12f08300 | 9090 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); |
9091 | ||
c2f47e15 | 9092 | if (!validate_arg (arg, REAL_TYPE)) |
d43cee80 | 9093 | return NULL_TREE; |
726069ba | 9094 | |
726069ba | 9095 | switch (builtin_index) |
9096 | { | |
12f08300 | 9097 | case BUILT_IN_ISINF: |
9098 | if (!HONOR_INFINITIES (arg)) | |
9099 | return omit_one_operand_loc (loc, type, integer_zero_node, arg); | |
9100 | ||
9101 | return NULL_TREE; | |
9102 | ||
c319d56a | 9103 | case BUILT_IN_ISINF_SIGN: |
9104 | { | |
9105 | /* isinf_sign(x) -> isinf(x) ? (signbit(x) ? -1 : 1) : 0 */ | |
9106 | /* In a boolean context, GCC will fold the inner COND_EXPR to | |
9107 | 1. So e.g. "if (isinf_sign(x))" would be folded to just | |
9108 | "if (isinf(x) ? 1 : 0)" which becomes "if (isinf(x))". */ | |
6cfc7001 | 9109 | tree signbit_fn = builtin_decl_explicit (BUILT_IN_SIGNBIT); |
b9a16870 | 9110 | tree isinf_fn = builtin_decl_explicit (BUILT_IN_ISINF); |
c319d56a | 9111 | tree tmp = NULL_TREE; |
9112 | ||
9113 | arg = builtin_save_expr (arg); | |
9114 | ||
9115 | if (signbit_fn && isinf_fn) | |
9116 | { | |
389dd41b | 9117 | tree signbit_call = build_call_expr_loc (loc, signbit_fn, 1, arg); |
9118 | tree isinf_call = build_call_expr_loc (loc, isinf_fn, 1, arg); | |
c319d56a | 9119 | |
389dd41b | 9120 | signbit_call = fold_build2_loc (loc, NE_EXPR, integer_type_node, |
c319d56a | 9121 | signbit_call, integer_zero_node); |
389dd41b | 9122 | isinf_call = fold_build2_loc (loc, NE_EXPR, integer_type_node, |
c319d56a | 9123 | isinf_call, integer_zero_node); |
48e1416a | 9124 | |
389dd41b | 9125 | tmp = fold_build3_loc (loc, COND_EXPR, integer_type_node, signbit_call, |
c319d56a | 9126 | integer_minus_one_node, integer_one_node); |
389dd41b | 9127 | tmp = fold_build3_loc (loc, COND_EXPR, integer_type_node, |
9128 | isinf_call, tmp, | |
c319d56a | 9129 | integer_zero_node); |
9130 | } | |
9131 | ||
9132 | return tmp; | |
9133 | } | |
9134 | ||
12f08300 | 9135 | case BUILT_IN_ISFINITE: |
9136 | if (!HONOR_NANS (arg) | |
9137 | && !HONOR_INFINITIES (arg)) | |
9138 | return omit_one_operand_loc (loc, type, integer_one_node, arg); | |
9139 | ||
9140 | return NULL_TREE; | |
9141 | ||
9142 | case BUILT_IN_ISNAN: | |
9143 | if (!HONOR_NANS (arg)) | |
9144 | return omit_one_operand_loc (loc, type, integer_zero_node, arg); | |
9145 | ||
9146 | { | |
9147 | bool is_ibm_extended = MODE_COMPOSITE_P (TYPE_MODE (TREE_TYPE (arg))); | |
9148 | if (is_ibm_extended) | |
9149 | { | |
9150 | /* NaN and Inf are encoded in the high-order double value | |
9151 | only. The low-order value is not significant. */ | |
9152 | arg = fold_build1_loc (loc, NOP_EXPR, double_type_node, arg); | |
9153 | } | |
9154 | } | |
9155 | arg = builtin_save_expr (arg); | |
9156 | return fold_build2_loc (loc, UNORDERED_EXPR, type, arg, arg); | |
9157 | ||
726069ba | 9158 | default: |
64db345d | 9159 | gcc_unreachable (); |
726069ba | 9160 | } |
9161 | } | |
9162 | ||
12f08300 | 9163 | /* Fold a call to __builtin_fpclassify(int, int, int, int, int, ...). |
9164 | This builtin will generate code to return the appropriate floating | |
9165 | point classification depending on the value of the floating point | |
9166 | number passed in. The possible return values must be supplied as | |
9167 | int arguments to the call in the following order: FP_NAN, FP_INFINITE, | |
9168 | FP_NORMAL, FP_SUBNORMAL and FP_ZERO. The ellipses is for exactly | |
9169 | one floating point argument which is "type generic". */ | |
9170 | ||
9171 | static tree | |
9172 | fold_builtin_fpclassify (location_t loc, tree *args, int nargs) | |
9173 | { | |
9174 | tree fp_nan, fp_infinite, fp_normal, fp_subnormal, fp_zero, | |
9175 | arg, type, res, tmp; | |
9176 | machine_mode mode; | |
9177 | REAL_VALUE_TYPE r; | |
9178 | char buf[128]; | |
9179 | ||
9180 | /* Verify the required arguments in the original call. */ | |
9181 | if (nargs != 6 | |
9182 | || !validate_arg (args[0], INTEGER_TYPE) | |
9183 | || !validate_arg (args[1], INTEGER_TYPE) | |
9184 | || !validate_arg (args[2], INTEGER_TYPE) | |
9185 | || !validate_arg (args[3], INTEGER_TYPE) | |
9186 | || !validate_arg (args[4], INTEGER_TYPE) | |
9187 | || !validate_arg (args[5], REAL_TYPE)) | |
9188 | return NULL_TREE; | |
9189 | ||
9190 | fp_nan = args[0]; | |
9191 | fp_infinite = args[1]; | |
9192 | fp_normal = args[2]; | |
9193 | fp_subnormal = args[3]; | |
9194 | fp_zero = args[4]; | |
9195 | arg = args[5]; | |
9196 | type = TREE_TYPE (arg); | |
9197 | mode = TYPE_MODE (type); | |
9198 | arg = builtin_save_expr (fold_build1_loc (loc, ABS_EXPR, type, arg)); | |
9199 | ||
9200 | /* fpclassify(x) -> | |
9201 | isnan(x) ? FP_NAN : | |
9202 | (fabs(x) == Inf ? FP_INFINITE : | |
9203 | (fabs(x) >= DBL_MIN ? FP_NORMAL : | |
9204 | (x == 0 ? FP_ZERO : FP_SUBNORMAL))). */ | |
9205 | ||
9206 | tmp = fold_build2_loc (loc, EQ_EXPR, integer_type_node, arg, | |
9207 | build_real (type, dconst0)); | |
9208 | res = fold_build3_loc (loc, COND_EXPR, integer_type_node, | |
9209 | tmp, fp_zero, fp_subnormal); | |
9210 | ||
9211 | sprintf (buf, "0x1p%d", REAL_MODE_FORMAT (mode)->emin - 1); | |
9212 | real_from_string (&r, buf); | |
9213 | tmp = fold_build2_loc (loc, GE_EXPR, integer_type_node, | |
9214 | arg, build_real (type, r)); | |
9215 | res = fold_build3_loc (loc, COND_EXPR, integer_type_node, tmp, fp_normal, res); | |
9216 | ||
9217 | if (HONOR_INFINITIES (mode)) | |
9218 | { | |
9219 | real_inf (&r); | |
9220 | tmp = fold_build2_loc (loc, EQ_EXPR, integer_type_node, arg, | |
9221 | build_real (type, r)); | |
9222 | res = fold_build3_loc (loc, COND_EXPR, integer_type_node, tmp, | |
9223 | fp_infinite, res); | |
9224 | } | |
9225 | ||
9226 | if (HONOR_NANS (mode)) | |
9227 | { | |
9228 | tmp = fold_build2_loc (loc, ORDERED_EXPR, integer_type_node, arg, arg); | |
9229 | res = fold_build3_loc (loc, COND_EXPR, integer_type_node, tmp, res, fp_nan); | |
9230 | } | |
9231 | ||
9232 | return res; | |
9233 | } | |
9234 | ||
9bc9f15f | 9235 | /* Fold a call to an unordered comparison function such as |
d5019fe8 | 9236 | __builtin_isgreater(). FNDECL is the FUNCTION_DECL for the function |
c2f47e15 | 9237 | being called and ARG0 and ARG1 are the arguments for the call. |
726069ba | 9238 | UNORDERED_CODE and ORDERED_CODE are comparison codes that give |
9239 | the opposite of the desired result. UNORDERED_CODE is used | |
9240 | for modes that can hold NaNs and ORDERED_CODE is used for | |
9241 | the rest. */ | |
9bc9f15f | 9242 | |
9243 | static tree | |
389dd41b | 9244 | fold_builtin_unordered_cmp (location_t loc, tree fndecl, tree arg0, tree arg1, |
9bc9f15f | 9245 | enum tree_code unordered_code, |
9246 | enum tree_code ordered_code) | |
9247 | { | |
859f903a | 9248 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); |
9bc9f15f | 9249 | enum tree_code code; |
6978db0d | 9250 | tree type0, type1; |
9251 | enum tree_code code0, code1; | |
9252 | tree cmp_type = NULL_TREE; | |
9bc9f15f | 9253 | |
6978db0d | 9254 | type0 = TREE_TYPE (arg0); |
9255 | type1 = TREE_TYPE (arg1); | |
a0c938f0 | 9256 | |
6978db0d | 9257 | code0 = TREE_CODE (type0); |
9258 | code1 = TREE_CODE (type1); | |
a0c938f0 | 9259 | |
6978db0d | 9260 | if (code0 == REAL_TYPE && code1 == REAL_TYPE) |
9261 | /* Choose the wider of two real types. */ | |
9262 | cmp_type = TYPE_PRECISION (type0) >= TYPE_PRECISION (type1) | |
9263 | ? type0 : type1; | |
9264 | else if (code0 == REAL_TYPE && code1 == INTEGER_TYPE) | |
9265 | cmp_type = type0; | |
9266 | else if (code0 == INTEGER_TYPE && code1 == REAL_TYPE) | |
9267 | cmp_type = type1; | |
a0c938f0 | 9268 | |
389dd41b | 9269 | arg0 = fold_convert_loc (loc, cmp_type, arg0); |
9270 | arg1 = fold_convert_loc (loc, cmp_type, arg1); | |
859f903a | 9271 | |
9272 | if (unordered_code == UNORDERED_EXPR) | |
9273 | { | |
93633022 | 9274 | if (!HONOR_NANS (arg0)) |
389dd41b | 9275 | return omit_two_operands_loc (loc, type, integer_zero_node, arg0, arg1); |
9276 | return fold_build2_loc (loc, UNORDERED_EXPR, type, arg0, arg1); | |
859f903a | 9277 | } |
9bc9f15f | 9278 | |
93633022 | 9279 | code = HONOR_NANS (arg0) ? unordered_code : ordered_code; |
389dd41b | 9280 | return fold_build1_loc (loc, TRUTH_NOT_EXPR, type, |
9281 | fold_build2_loc (loc, code, type, arg0, arg1)); | |
9bc9f15f | 9282 | } |
9283 | ||
0c93c8a9 | 9284 | /* Fold __builtin_{,s,u}{add,sub,mul}{,l,ll}_overflow, either into normal |
9285 | arithmetics if it can never overflow, or into internal functions that | |
9286 | return both result of arithmetics and overflowed boolean flag in | |
732905bb | 9287 | a complex integer result, or some other check for overflow. |
9288 | Similarly fold __builtin_{add,sub,mul}_overflow_p to just the overflow | |
9289 | checking part of that. */ | |
0c93c8a9 | 9290 | |
9291 | static tree | |
9292 | fold_builtin_arith_overflow (location_t loc, enum built_in_function fcode, | |
9293 | tree arg0, tree arg1, tree arg2) | |
9294 | { | |
9295 | enum internal_fn ifn = IFN_LAST; | |
732905bb | 9296 | /* The code of the expression corresponding to the type-generic |
9297 | built-in, or ERROR_MARK for the type-specific ones. */ | |
9298 | enum tree_code opcode = ERROR_MARK; | |
9299 | bool ovf_only = false; | |
9300 | ||
0c93c8a9 | 9301 | switch (fcode) |
9302 | { | |
732905bb | 9303 | case BUILT_IN_ADD_OVERFLOW_P: |
9304 | ovf_only = true; | |
9305 | /* FALLTHRU */ | |
0c93c8a9 | 9306 | case BUILT_IN_ADD_OVERFLOW: |
732905bb | 9307 | opcode = PLUS_EXPR; |
9308 | /* FALLTHRU */ | |
0c93c8a9 | 9309 | case BUILT_IN_SADD_OVERFLOW: |
9310 | case BUILT_IN_SADDL_OVERFLOW: | |
9311 | case BUILT_IN_SADDLL_OVERFLOW: | |
9312 | case BUILT_IN_UADD_OVERFLOW: | |
9313 | case BUILT_IN_UADDL_OVERFLOW: | |
9314 | case BUILT_IN_UADDLL_OVERFLOW: | |
9315 | ifn = IFN_ADD_OVERFLOW; | |
9316 | break; | |
732905bb | 9317 | case BUILT_IN_SUB_OVERFLOW_P: |
9318 | ovf_only = true; | |
9319 | /* FALLTHRU */ | |
0c93c8a9 | 9320 | case BUILT_IN_SUB_OVERFLOW: |
732905bb | 9321 | opcode = MINUS_EXPR; |
9322 | /* FALLTHRU */ | |
0c93c8a9 | 9323 | case BUILT_IN_SSUB_OVERFLOW: |
9324 | case BUILT_IN_SSUBL_OVERFLOW: | |
9325 | case BUILT_IN_SSUBLL_OVERFLOW: | |
9326 | case BUILT_IN_USUB_OVERFLOW: | |
9327 | case BUILT_IN_USUBL_OVERFLOW: | |
9328 | case BUILT_IN_USUBLL_OVERFLOW: | |
9329 | ifn = IFN_SUB_OVERFLOW; | |
9330 | break; | |
732905bb | 9331 | case BUILT_IN_MUL_OVERFLOW_P: |
9332 | ovf_only = true; | |
9333 | /* FALLTHRU */ | |
0c93c8a9 | 9334 | case BUILT_IN_MUL_OVERFLOW: |
732905bb | 9335 | opcode = MULT_EXPR; |
9336 | /* FALLTHRU */ | |
0c93c8a9 | 9337 | case BUILT_IN_SMUL_OVERFLOW: |
9338 | case BUILT_IN_SMULL_OVERFLOW: | |
9339 | case BUILT_IN_SMULLL_OVERFLOW: | |
9340 | case BUILT_IN_UMUL_OVERFLOW: | |
9341 | case BUILT_IN_UMULL_OVERFLOW: | |
9342 | case BUILT_IN_UMULLL_OVERFLOW: | |
9343 | ifn = IFN_MUL_OVERFLOW; | |
9344 | break; | |
9345 | default: | |
9346 | gcc_unreachable (); | |
9347 | } | |
732905bb | 9348 | |
9349 | /* For the "generic" overloads, the first two arguments can have different | |
9350 | types and the last argument determines the target type to use to check | |
9351 | for overflow. The arguments of the other overloads all have the same | |
9352 | type. */ | |
9353 | tree type = ovf_only ? TREE_TYPE (arg2) : TREE_TYPE (TREE_TYPE (arg2)); | |
9354 | ||
9355 | /* For the __builtin_{add,sub,mul}_overflow_p builtins, when the first two | |
9356 | arguments are constant, attempt to fold the built-in call into a constant | |
9357 | expression indicating whether or not it detected an overflow. */ | |
9358 | if (ovf_only | |
9359 | && TREE_CODE (arg0) == INTEGER_CST | |
9360 | && TREE_CODE (arg1) == INTEGER_CST) | |
9361 | /* Perform the computation in the target type and check for overflow. */ | |
9362 | return omit_one_operand_loc (loc, boolean_type_node, | |
9363 | arith_overflowed_p (opcode, type, arg0, arg1) | |
9364 | ? boolean_true_node : boolean_false_node, | |
9365 | arg2); | |
9366 | ||
0c93c8a9 | 9367 | tree ctype = build_complex_type (type); |
9368 | tree call = build_call_expr_internal_loc (loc, ifn, ctype, | |
9369 | 2, arg0, arg1); | |
9370 | tree tgt = save_expr (call); | |
9371 | tree intres = build1_loc (loc, REALPART_EXPR, type, tgt); | |
9372 | tree ovfres = build1_loc (loc, IMAGPART_EXPR, type, tgt); | |
9373 | ovfres = fold_convert_loc (loc, boolean_type_node, ovfres); | |
732905bb | 9374 | |
9375 | if (ovf_only) | |
9376 | return omit_one_operand_loc (loc, boolean_type_node, ovfres, arg2); | |
9377 | ||
9378 | tree mem_arg2 = build_fold_indirect_ref_loc (loc, arg2); | |
0c93c8a9 | 9379 | tree store |
9380 | = fold_build2_loc (loc, MODIFY_EXPR, void_type_node, mem_arg2, intres); | |
9381 | return build2_loc (loc, COMPOUND_EXPR, boolean_type_node, store, ovfres); | |
9382 | } | |
9383 | ||
c388a0cf | 9384 | /* Fold a call to __builtin_FILE to a constant string. */ |
9385 | ||
9386 | static inline tree | |
9387 | fold_builtin_FILE (location_t loc) | |
9388 | { | |
9389 | if (const char *fname = LOCATION_FILE (loc)) | |
859b51f8 | 9390 | { |
9391 | /* The documentation says this builtin is equivalent to the preprocessor | |
9392 | __FILE__ macro so it appears appropriate to use the same file prefix | |
9393 | mappings. */ | |
9394 | fname = remap_macro_filename (fname); | |
c388a0cf | 9395 | return build_string_literal (strlen (fname) + 1, fname); |
859b51f8 | 9396 | } |
c388a0cf | 9397 | |
9398 | return build_string_literal (1, ""); | |
9399 | } | |
9400 | ||
9401 | /* Fold a call to __builtin_FUNCTION to a constant string. */ | |
9402 | ||
9403 | static inline tree | |
9404 | fold_builtin_FUNCTION () | |
9405 | { | |
c2d38635 | 9406 | const char *name = ""; |
9407 | ||
c388a0cf | 9408 | if (current_function_decl) |
c2d38635 | 9409 | name = lang_hooks.decl_printable_name (current_function_decl, 0); |
c388a0cf | 9410 | |
c2d38635 | 9411 | return build_string_literal (strlen (name) + 1, name); |
c388a0cf | 9412 | } |
9413 | ||
9414 | /* Fold a call to __builtin_LINE to an integer constant. */ | |
9415 | ||
9416 | static inline tree | |
9417 | fold_builtin_LINE (location_t loc, tree type) | |
9418 | { | |
9419 | return build_int_cst (type, LOCATION_LINE (loc)); | |
9420 | } | |
9421 | ||
c2f47e15 | 9422 | /* Fold a call to built-in function FNDECL with 0 arguments. |
e80cc485 | 9423 | This function returns NULL_TREE if no simplification was possible. */ |
650e4c94 | 9424 | |
4ee9c684 | 9425 | static tree |
e80cc485 | 9426 | fold_builtin_0 (location_t loc, tree fndecl) |
650e4c94 | 9427 | { |
e9f80ff5 | 9428 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); |
c2f47e15 | 9429 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); |
189b3398 | 9430 | switch (fcode) |
650e4c94 | 9431 | { |
c388a0cf | 9432 | case BUILT_IN_FILE: |
9433 | return fold_builtin_FILE (loc); | |
9434 | ||
9435 | case BUILT_IN_FUNCTION: | |
9436 | return fold_builtin_FUNCTION (); | |
9437 | ||
9438 | case BUILT_IN_LINE: | |
9439 | return fold_builtin_LINE (loc, type); | |
9440 | ||
c2f47e15 | 9441 | CASE_FLT_FN (BUILT_IN_INF): |
012f068a | 9442 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_INF): |
c2f47e15 | 9443 | case BUILT_IN_INFD32: |
9444 | case BUILT_IN_INFD64: | |
9445 | case BUILT_IN_INFD128: | |
389dd41b | 9446 | return fold_builtin_inf (loc, type, true); |
7c2f0500 | 9447 | |
c2f47e15 | 9448 | CASE_FLT_FN (BUILT_IN_HUGE_VAL): |
012f068a | 9449 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_HUGE_VAL): |
389dd41b | 9450 | return fold_builtin_inf (loc, type, false); |
7c2f0500 | 9451 | |
c2f47e15 | 9452 | case BUILT_IN_CLASSIFY_TYPE: |
9453 | return fold_builtin_classify_type (NULL_TREE); | |
7c2f0500 | 9454 | |
c2f47e15 | 9455 | default: |
9456 | break; | |
9457 | } | |
9458 | return NULL_TREE; | |
9459 | } | |
7c2f0500 | 9460 | |
c2f47e15 | 9461 | /* Fold a call to built-in function FNDECL with 1 argument, ARG0. |
e80cc485 | 9462 | This function returns NULL_TREE if no simplification was possible. */ |
7c2f0500 | 9463 | |
c2f47e15 | 9464 | static tree |
e80cc485 | 9465 | fold_builtin_1 (location_t loc, tree fndecl, tree arg0) |
c2f47e15 | 9466 | { |
9467 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); | |
9468 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
6c21be92 | 9469 | |
9470 | if (TREE_CODE (arg0) == ERROR_MARK) | |
9471 | return NULL_TREE; | |
9472 | ||
744fe358 | 9473 | if (tree ret = fold_const_call (as_combined_fn (fcode), type, arg0)) |
6c21be92 | 9474 | return ret; |
9475 | ||
c2f47e15 | 9476 | switch (fcode) |
9477 | { | |
650e4c94 | 9478 | case BUILT_IN_CONSTANT_P: |
7c2f0500 | 9479 | { |
c2f47e15 | 9480 | tree val = fold_builtin_constant_p (arg0); |
7c2f0500 | 9481 | |
7c2f0500 | 9482 | /* Gimplification will pull the CALL_EXPR for the builtin out of |
9483 | an if condition. When not optimizing, we'll not CSE it back. | |
9484 | To avoid link error types of regressions, return false now. */ | |
9485 | if (!val && !optimize) | |
9486 | val = integer_zero_node; | |
9487 | ||
9488 | return val; | |
9489 | } | |
650e4c94 | 9490 | |
539a3a92 | 9491 | case BUILT_IN_CLASSIFY_TYPE: |
c2f47e15 | 9492 | return fold_builtin_classify_type (arg0); |
539a3a92 | 9493 | |
650e4c94 | 9494 | case BUILT_IN_STRLEN: |
c7cbde74 | 9495 | return fold_builtin_strlen (loc, type, arg0); |
650e4c94 | 9496 | |
4f35b1fc | 9497 | CASE_FLT_FN (BUILT_IN_FABS): |
012f068a | 9498 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FABS): |
8aa32773 | 9499 | case BUILT_IN_FABSD32: |
9500 | case BUILT_IN_FABSD64: | |
9501 | case BUILT_IN_FABSD128: | |
389dd41b | 9502 | return fold_builtin_fabs (loc, arg0, type); |
d1aade50 | 9503 | |
9504 | case BUILT_IN_ABS: | |
9505 | case BUILT_IN_LABS: | |
9506 | case BUILT_IN_LLABS: | |
9507 | case BUILT_IN_IMAXABS: | |
389dd41b | 9508 | return fold_builtin_abs (loc, arg0, type); |
c63f4ad3 | 9509 | |
4f35b1fc | 9510 | CASE_FLT_FN (BUILT_IN_CONJ): |
239d491a | 9511 | if (validate_arg (arg0, COMPLEX_TYPE) |
48e1416a | 9512 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg0))) == REAL_TYPE) |
389dd41b | 9513 | return fold_build1_loc (loc, CONJ_EXPR, type, arg0); |
c2f47e15 | 9514 | break; |
36d3581d | 9515 | |
4f35b1fc | 9516 | CASE_FLT_FN (BUILT_IN_CREAL): |
239d491a | 9517 | if (validate_arg (arg0, COMPLEX_TYPE) |
48e1416a | 9518 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg0))) == REAL_TYPE) |
7082509e | 9519 | return non_lvalue_loc (loc, fold_build1_loc (loc, REALPART_EXPR, type, arg0)); |
c2f47e15 | 9520 | break; |
36d3581d | 9521 | |
4f35b1fc | 9522 | CASE_FLT_FN (BUILT_IN_CIMAG): |
b0ce8887 | 9523 | if (validate_arg (arg0, COMPLEX_TYPE) |
9524 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg0))) == REAL_TYPE) | |
389dd41b | 9525 | return non_lvalue_loc (loc, fold_build1_loc (loc, IMAGPART_EXPR, type, arg0)); |
c2f47e15 | 9526 | break; |
36d3581d | 9527 | |
6c21be92 | 9528 | CASE_FLT_FN (BUILT_IN_CARG): |
9529 | return fold_builtin_carg (loc, arg0, type); | |
c2373fdb | 9530 | |
6c21be92 | 9531 | case BUILT_IN_ISASCII: |
9532 | return fold_builtin_isascii (loc, arg0); | |
48e1416a | 9533 | |
6c21be92 | 9534 | case BUILT_IN_TOASCII: |
9535 | return fold_builtin_toascii (loc, arg0); | |
48e1416a | 9536 | |
6c21be92 | 9537 | case BUILT_IN_ISDIGIT: |
9538 | return fold_builtin_isdigit (loc, arg0); | |
48e1416a | 9539 | |
12f08300 | 9540 | CASE_FLT_FN (BUILT_IN_FINITE): |
9541 | case BUILT_IN_FINITED32: | |
9542 | case BUILT_IN_FINITED64: | |
9543 | case BUILT_IN_FINITED128: | |
9544 | case BUILT_IN_ISFINITE: | |
9545 | { | |
9546 | tree ret = fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISFINITE); | |
9547 | if (ret) | |
9548 | return ret; | |
9549 | return fold_builtin_interclass_mathfn (loc, fndecl, arg0); | |
9550 | } | |
9551 | ||
9552 | CASE_FLT_FN (BUILT_IN_ISINF): | |
9553 | case BUILT_IN_ISINFD32: | |
9554 | case BUILT_IN_ISINFD64: | |
9555 | case BUILT_IN_ISINFD128: | |
9556 | { | |
9557 | tree ret = fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISINF); | |
9558 | if (ret) | |
9559 | return ret; | |
9560 | return fold_builtin_interclass_mathfn (loc, fndecl, arg0); | |
9561 | } | |
9562 | ||
9563 | case BUILT_IN_ISNORMAL: | |
9564 | return fold_builtin_interclass_mathfn (loc, fndecl, arg0); | |
9565 | ||
6c21be92 | 9566 | case BUILT_IN_ISINF_SIGN: |
12f08300 | 9567 | return fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISINF_SIGN); |
9568 | ||
9569 | CASE_FLT_FN (BUILT_IN_ISNAN): | |
9570 | case BUILT_IN_ISNAND32: | |
9571 | case BUILT_IN_ISNAND64: | |
9572 | case BUILT_IN_ISNAND128: | |
9573 | return fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISNAN); | |
48e1416a | 9574 | |
6c21be92 | 9575 | case BUILT_IN_FREE: |
9576 | if (integer_zerop (arg0)) | |
9577 | return build_empty_stmt (loc); | |
d064d976 | 9578 | break; |
c63f4ad3 | 9579 | |
6c21be92 | 9580 | default: |
8b4af95f | 9581 | break; |
6c21be92 | 9582 | } |
805e22b2 | 9583 | |
6c21be92 | 9584 | return NULL_TREE; |
3bc5c41b | 9585 | |
6c21be92 | 9586 | } |
728bac60 | 9587 | |
6c21be92 | 9588 | /* Fold a call to built-in function FNDECL with 2 arguments, ARG0 and ARG1. |
9589 | This function returns NULL_TREE if no simplification was possible. */ | |
c2f47e15 | 9590 | |
9591 | static tree | |
e80cc485 | 9592 | fold_builtin_2 (location_t loc, tree fndecl, tree arg0, tree arg1) |
c2f47e15 | 9593 | { |
9594 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); | |
9595 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
9596 | ||
6c21be92 | 9597 | if (TREE_CODE (arg0) == ERROR_MARK |
9598 | || TREE_CODE (arg1) == ERROR_MARK) | |
9599 | return NULL_TREE; | |
e5407ca6 | 9600 | |
744fe358 | 9601 | if (tree ret = fold_const_call (as_combined_fn (fcode), type, arg0, arg1)) |
6c21be92 | 9602 | return ret; |
e84da7c1 | 9603 | |
6c21be92 | 9604 | switch (fcode) |
9605 | { | |
e84da7c1 | 9606 | CASE_FLT_FN_REENT (BUILT_IN_GAMMA): /* GAMMA_R */ |
9607 | CASE_FLT_FN_REENT (BUILT_IN_LGAMMA): /* LGAMMA_R */ | |
9608 | if (validate_arg (arg0, REAL_TYPE) | |
9af5ce0c | 9609 | && validate_arg (arg1, POINTER_TYPE)) |
e84da7c1 | 9610 | return do_mpfr_lgamma_r (arg0, arg1, type); |
9611 | break; | |
c2f47e15 | 9612 | |
3838b9ae | 9613 | CASE_FLT_FN (BUILT_IN_FREXP): |
389dd41b | 9614 | return fold_builtin_frexp (loc, arg0, arg1, type); |
3838b9ae | 9615 | |
ebf8b4f5 | 9616 | CASE_FLT_FN (BUILT_IN_MODF): |
389dd41b | 9617 | return fold_builtin_modf (loc, arg0, arg1, type); |
ebf8b4f5 | 9618 | |
c2f47e15 | 9619 | case BUILT_IN_STRSPN: |
389dd41b | 9620 | return fold_builtin_strspn (loc, arg0, arg1); |
c2f47e15 | 9621 | |
9622 | case BUILT_IN_STRCSPN: | |
389dd41b | 9623 | return fold_builtin_strcspn (loc, arg0, arg1); |
c2f47e15 | 9624 | |
c2f47e15 | 9625 | case BUILT_IN_STRPBRK: |
389dd41b | 9626 | return fold_builtin_strpbrk (loc, arg0, arg1, type); |
c2f47e15 | 9627 | |
9628 | case BUILT_IN_EXPECT: | |
01107f42 | 9629 | return fold_builtin_expect (loc, arg0, arg1, NULL_TREE, NULL_TREE); |
c2f47e15 | 9630 | |
9bc9f15f | 9631 | case BUILT_IN_ISGREATER: |
389dd41b | 9632 | return fold_builtin_unordered_cmp (loc, fndecl, |
9633 | arg0, arg1, UNLE_EXPR, LE_EXPR); | |
9bc9f15f | 9634 | case BUILT_IN_ISGREATEREQUAL: |
389dd41b | 9635 | return fold_builtin_unordered_cmp (loc, fndecl, |
9636 | arg0, arg1, UNLT_EXPR, LT_EXPR); | |
9bc9f15f | 9637 | case BUILT_IN_ISLESS: |
389dd41b | 9638 | return fold_builtin_unordered_cmp (loc, fndecl, |
9639 | arg0, arg1, UNGE_EXPR, GE_EXPR); | |
9bc9f15f | 9640 | case BUILT_IN_ISLESSEQUAL: |
389dd41b | 9641 | return fold_builtin_unordered_cmp (loc, fndecl, |
9642 | arg0, arg1, UNGT_EXPR, GT_EXPR); | |
9bc9f15f | 9643 | case BUILT_IN_ISLESSGREATER: |
389dd41b | 9644 | return fold_builtin_unordered_cmp (loc, fndecl, |
9645 | arg0, arg1, UNEQ_EXPR, EQ_EXPR); | |
9bc9f15f | 9646 | case BUILT_IN_ISUNORDERED: |
389dd41b | 9647 | return fold_builtin_unordered_cmp (loc, fndecl, |
9648 | arg0, arg1, UNORDERED_EXPR, | |
d5019fe8 | 9649 | NOP_EXPR); |
9bc9f15f | 9650 | |
7c2f0500 | 9651 | /* We do the folding for va_start in the expander. */ |
9652 | case BUILT_IN_VA_START: | |
9653 | break; | |
f0613857 | 9654 | |
0a39fd54 | 9655 | case BUILT_IN_OBJECT_SIZE: |
c2f47e15 | 9656 | return fold_builtin_object_size (arg0, arg1); |
0a39fd54 | 9657 | |
1cd6e20d | 9658 | case BUILT_IN_ATOMIC_ALWAYS_LOCK_FREE: |
9659 | return fold_builtin_atomic_always_lock_free (arg0, arg1); | |
9660 | ||
9661 | case BUILT_IN_ATOMIC_IS_LOCK_FREE: | |
9662 | return fold_builtin_atomic_is_lock_free (arg0, arg1); | |
9663 | ||
c2f47e15 | 9664 | default: |
9665 | break; | |
9666 | } | |
9667 | return NULL_TREE; | |
9668 | } | |
9669 | ||
9670 | /* Fold a call to built-in function FNDECL with 3 arguments, ARG0, ARG1, | |
e80cc485 | 9671 | and ARG2. |
c2f47e15 | 9672 | This function returns NULL_TREE if no simplification was possible. */ |
9673 | ||
9674 | static tree | |
389dd41b | 9675 | fold_builtin_3 (location_t loc, tree fndecl, |
e80cc485 | 9676 | tree arg0, tree arg1, tree arg2) |
c2f47e15 | 9677 | { |
9678 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); | |
9679 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
6c21be92 | 9680 | |
9681 | if (TREE_CODE (arg0) == ERROR_MARK | |
9682 | || TREE_CODE (arg1) == ERROR_MARK | |
9683 | || TREE_CODE (arg2) == ERROR_MARK) | |
9684 | return NULL_TREE; | |
9685 | ||
744fe358 | 9686 | if (tree ret = fold_const_call (as_combined_fn (fcode), type, |
9687 | arg0, arg1, arg2)) | |
6c21be92 | 9688 | return ret; |
9689 | ||
c2f47e15 | 9690 | switch (fcode) |
9691 | { | |
9692 | ||
9693 | CASE_FLT_FN (BUILT_IN_SINCOS): | |
389dd41b | 9694 | return fold_builtin_sincos (loc, arg0, arg1, arg2); |
c2f47e15 | 9695 | |
e5407ca6 | 9696 | CASE_FLT_FN (BUILT_IN_REMQUO): |
9697 | if (validate_arg (arg0, REAL_TYPE) | |
9af5ce0c | 9698 | && validate_arg (arg1, REAL_TYPE) |
9699 | && validate_arg (arg2, POINTER_TYPE)) | |
e5407ca6 | 9700 | return do_mpfr_remquo (arg0, arg1, arg2); |
9701 | break; | |
e5407ca6 | 9702 | |
c2f47e15 | 9703 | case BUILT_IN_MEMCMP: |
7f38a6aa | 9704 | return fold_builtin_memcmp (loc, arg0, arg1, arg2); |
c2f47e15 | 9705 | |
c83059be | 9706 | case BUILT_IN_EXPECT: |
01107f42 | 9707 | return fold_builtin_expect (loc, arg0, arg1, arg2, NULL_TREE); |
9708 | ||
9709 | case BUILT_IN_EXPECT_WITH_PROBABILITY: | |
9710 | return fold_builtin_expect (loc, arg0, arg1, NULL_TREE, arg2); | |
c83059be | 9711 | |
0c93c8a9 | 9712 | case BUILT_IN_ADD_OVERFLOW: |
9713 | case BUILT_IN_SUB_OVERFLOW: | |
9714 | case BUILT_IN_MUL_OVERFLOW: | |
732905bb | 9715 | case BUILT_IN_ADD_OVERFLOW_P: |
9716 | case BUILT_IN_SUB_OVERFLOW_P: | |
9717 | case BUILT_IN_MUL_OVERFLOW_P: | |
0c93c8a9 | 9718 | case BUILT_IN_SADD_OVERFLOW: |
9719 | case BUILT_IN_SADDL_OVERFLOW: | |
9720 | case BUILT_IN_SADDLL_OVERFLOW: | |
9721 | case BUILT_IN_SSUB_OVERFLOW: | |
9722 | case BUILT_IN_SSUBL_OVERFLOW: | |
9723 | case BUILT_IN_SSUBLL_OVERFLOW: | |
9724 | case BUILT_IN_SMUL_OVERFLOW: | |
9725 | case BUILT_IN_SMULL_OVERFLOW: | |
9726 | case BUILT_IN_SMULLL_OVERFLOW: | |
9727 | case BUILT_IN_UADD_OVERFLOW: | |
9728 | case BUILT_IN_UADDL_OVERFLOW: | |
9729 | case BUILT_IN_UADDLL_OVERFLOW: | |
9730 | case BUILT_IN_USUB_OVERFLOW: | |
9731 | case BUILT_IN_USUBL_OVERFLOW: | |
9732 | case BUILT_IN_USUBLL_OVERFLOW: | |
9733 | case BUILT_IN_UMUL_OVERFLOW: | |
9734 | case BUILT_IN_UMULL_OVERFLOW: | |
9735 | case BUILT_IN_UMULLL_OVERFLOW: | |
9736 | return fold_builtin_arith_overflow (loc, fcode, arg0, arg1, arg2); | |
9737 | ||
650e4c94 | 9738 | default: |
9739 | break; | |
9740 | } | |
c2f47e15 | 9741 | return NULL_TREE; |
9742 | } | |
650e4c94 | 9743 | |
c2f47e15 | 9744 | /* Fold a call to built-in function FNDECL. ARGS is an array of NARGS |
9d884767 | 9745 | arguments. IGNORE is true if the result of the |
9746 | function call is ignored. This function returns NULL_TREE if no | |
9747 | simplification was possible. */ | |
48e1416a | 9748 | |
2165588a | 9749 | tree |
e80cc485 | 9750 | fold_builtin_n (location_t loc, tree fndecl, tree *args, int nargs, bool) |
c2f47e15 | 9751 | { |
9752 | tree ret = NULL_TREE; | |
a7f5bb2d | 9753 | |
c2f47e15 | 9754 | switch (nargs) |
9755 | { | |
9756 | case 0: | |
e80cc485 | 9757 | ret = fold_builtin_0 (loc, fndecl); |
c2f47e15 | 9758 | break; |
9759 | case 1: | |
e80cc485 | 9760 | ret = fold_builtin_1 (loc, fndecl, args[0]); |
c2f47e15 | 9761 | break; |
9762 | case 2: | |
e80cc485 | 9763 | ret = fold_builtin_2 (loc, fndecl, args[0], args[1]); |
c2f47e15 | 9764 | break; |
9765 | case 3: | |
e80cc485 | 9766 | ret = fold_builtin_3 (loc, fndecl, args[0], args[1], args[2]); |
c2f47e15 | 9767 | break; |
c2f47e15 | 9768 | default: |
12f08300 | 9769 | ret = fold_builtin_varargs (loc, fndecl, args, nargs); |
c2f47e15 | 9770 | break; |
9771 | } | |
9772 | if (ret) | |
9773 | { | |
75a70cf9 | 9774 | ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret); |
389dd41b | 9775 | SET_EXPR_LOCATION (ret, loc); |
c2f47e15 | 9776 | return ret; |
9777 | } | |
9778 | return NULL_TREE; | |
9779 | } | |
9780 | ||
0e80b01d | 9781 | /* Construct a new CALL_EXPR to FNDECL using the tail of the argument |
9782 | list ARGS along with N new arguments in NEWARGS. SKIP is the number | |
9783 | of arguments in ARGS to be omitted. OLDNARGS is the number of | |
9784 | elements in ARGS. */ | |
c2f47e15 | 9785 | |
9786 | static tree | |
0e80b01d | 9787 | rewrite_call_expr_valist (location_t loc, int oldnargs, tree *args, |
9788 | int skip, tree fndecl, int n, va_list newargs) | |
c2f47e15 | 9789 | { |
0e80b01d | 9790 | int nargs = oldnargs - skip + n; |
9791 | tree *buffer; | |
c2f47e15 | 9792 | |
0e80b01d | 9793 | if (n > 0) |
c2f47e15 | 9794 | { |
0e80b01d | 9795 | int i, j; |
c2f47e15 | 9796 | |
0e80b01d | 9797 | buffer = XALLOCAVEC (tree, nargs); |
9798 | for (i = 0; i < n; i++) | |
9799 | buffer[i] = va_arg (newargs, tree); | |
9800 | for (j = skip; j < oldnargs; j++, i++) | |
9801 | buffer[i] = args[j]; | |
9802 | } | |
9803 | else | |
9804 | buffer = args + skip; | |
19fbe3a4 | 9805 | |
0e80b01d | 9806 | return build_call_expr_loc_array (loc, fndecl, nargs, buffer); |
9807 | } | |
c2f47e15 | 9808 | |
198622c0 | 9809 | /* Return true if FNDECL shouldn't be folded right now. |
9810 | If a built-in function has an inline attribute always_inline | |
9811 | wrapper, defer folding it after always_inline functions have | |
9812 | been inlined, otherwise e.g. -D_FORTIFY_SOURCE checking | |
9813 | might not be performed. */ | |
9814 | ||
51d2c51e | 9815 | bool |
198622c0 | 9816 | avoid_folding_inline_builtin (tree fndecl) |
9817 | { | |
9818 | return (DECL_DECLARED_INLINE_P (fndecl) | |
9819 | && DECL_DISREGARD_INLINE_LIMITS (fndecl) | |
9820 | && cfun | |
9821 | && !cfun->always_inline_functions_inlined | |
9822 | && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fndecl))); | |
9823 | } | |
9824 | ||
4ee9c684 | 9825 | /* A wrapper function for builtin folding that prevents warnings for |
491e04ef | 9826 | "statement without effect" and the like, caused by removing the |
4ee9c684 | 9827 | call node earlier than the warning is generated. */ |
9828 | ||
9829 | tree | |
389dd41b | 9830 | fold_call_expr (location_t loc, tree exp, bool ignore) |
4ee9c684 | 9831 | { |
c2f47e15 | 9832 | tree ret = NULL_TREE; |
9833 | tree fndecl = get_callee_fndecl (exp); | |
a0e9bfbb | 9834 | if (fndecl && fndecl_built_in_p (fndecl) |
48dc2227 | 9835 | /* If CALL_EXPR_VA_ARG_PACK is set, the arguments aren't finalized |
9836 | yet. Defer folding until we see all the arguments | |
9837 | (after inlining). */ | |
9838 | && !CALL_EXPR_VA_ARG_PACK (exp)) | |
9839 | { | |
9840 | int nargs = call_expr_nargs (exp); | |
9841 | ||
9842 | /* Before gimplification CALL_EXPR_VA_ARG_PACK is not set, but | |
9843 | instead last argument is __builtin_va_arg_pack (). Defer folding | |
9844 | even in that case, until arguments are finalized. */ | |
9845 | if (nargs && TREE_CODE (CALL_EXPR_ARG (exp, nargs - 1)) == CALL_EXPR) | |
9846 | { | |
9847 | tree fndecl2 = get_callee_fndecl (CALL_EXPR_ARG (exp, nargs - 1)); | |
a0e9bfbb | 9848 | if (fndecl2 && fndecl_built_in_p (fndecl2, BUILT_IN_VA_ARG_PACK)) |
48dc2227 | 9849 | return NULL_TREE; |
9850 | } | |
9851 | ||
198622c0 | 9852 | if (avoid_folding_inline_builtin (fndecl)) |
9853 | return NULL_TREE; | |
9854 | ||
c2f47e15 | 9855 | if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD) |
97d67146 | 9856 | return targetm.fold_builtin (fndecl, call_expr_nargs (exp), |
9857 | CALL_EXPR_ARGP (exp), ignore); | |
c2f47e15 | 9858 | else |
9859 | { | |
9d884767 | 9860 | tree *args = CALL_EXPR_ARGP (exp); |
9861 | ret = fold_builtin_n (loc, fndecl, args, nargs, ignore); | |
c2f47e15 | 9862 | if (ret) |
389dd41b | 9863 | return ret; |
c2f47e15 | 9864 | } |
4ee9c684 | 9865 | } |
c2f47e15 | 9866 | return NULL_TREE; |
9867 | } | |
48e1416a | 9868 | |
9d884767 | 9869 | /* Fold a CALL_EXPR with type TYPE with FN as the function expression. |
9870 | N arguments are passed in the array ARGARRAY. Return a folded | |
9871 | expression or NULL_TREE if no simplification was possible. */ | |
805e22b2 | 9872 | |
9873 | tree | |
9d884767 | 9874 | fold_builtin_call_array (location_t loc, tree, |
d01f58f9 | 9875 | tree fn, |
9876 | int n, | |
9877 | tree *argarray) | |
7e15618b | 9878 | { |
9d884767 | 9879 | if (TREE_CODE (fn) != ADDR_EXPR) |
9880 | return NULL_TREE; | |
c2f47e15 | 9881 | |
9d884767 | 9882 | tree fndecl = TREE_OPERAND (fn, 0); |
9883 | if (TREE_CODE (fndecl) == FUNCTION_DECL | |
a0e9bfbb | 9884 | && fndecl_built_in_p (fndecl)) |
9d884767 | 9885 | { |
9886 | /* If last argument is __builtin_va_arg_pack (), arguments to this | |
9887 | function are not finalized yet. Defer folding until they are. */ | |
9888 | if (n && TREE_CODE (argarray[n - 1]) == CALL_EXPR) | |
9889 | { | |
9890 | tree fndecl2 = get_callee_fndecl (argarray[n - 1]); | |
a0e9bfbb | 9891 | if (fndecl2 && fndecl_built_in_p (fndecl2, BUILT_IN_VA_ARG_PACK)) |
9d884767 | 9892 | return NULL_TREE; |
9893 | } | |
9894 | if (avoid_folding_inline_builtin (fndecl)) | |
9895 | return NULL_TREE; | |
9896 | if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD) | |
9897 | return targetm.fold_builtin (fndecl, n, argarray, false); | |
9898 | else | |
9899 | return fold_builtin_n (loc, fndecl, argarray, n, false); | |
9900 | } | |
c2f47e15 | 9901 | |
9d884767 | 9902 | return NULL_TREE; |
c2f47e15 | 9903 | } |
9904 | ||
af1409ad | 9905 | /* Construct a new CALL_EXPR using the tail of the argument list of EXP |
9906 | along with N new arguments specified as the "..." parameters. SKIP | |
9907 | is the number of arguments in EXP to be omitted. This function is used | |
9908 | to do varargs-to-varargs transformations. */ | |
9909 | ||
9910 | static tree | |
9911 | rewrite_call_expr (location_t loc, tree exp, int skip, tree fndecl, int n, ...) | |
9912 | { | |
9913 | va_list ap; | |
9914 | tree t; | |
9915 | ||
9916 | va_start (ap, n); | |
9917 | t = rewrite_call_expr_valist (loc, call_expr_nargs (exp), | |
9918 | CALL_EXPR_ARGP (exp), skip, fndecl, n, ap); | |
9919 | va_end (ap); | |
c2f47e15 | 9920 | |
af1409ad | 9921 | return t; |
c2f47e15 | 9922 | } |
9923 | ||
9924 | /* Validate a single argument ARG against a tree code CODE representing | |
184fac50 | 9925 | a type. Return true when argument is valid. */ |
48e1416a | 9926 | |
c2f47e15 | 9927 | static bool |
184fac50 | 9928 | validate_arg (const_tree arg, enum tree_code code) |
c2f47e15 | 9929 | { |
9930 | if (!arg) | |
9931 | return false; | |
9932 | else if (code == POINTER_TYPE) | |
184fac50 | 9933 | return POINTER_TYPE_P (TREE_TYPE (arg)); |
c7f617c2 | 9934 | else if (code == INTEGER_TYPE) |
9935 | return INTEGRAL_TYPE_P (TREE_TYPE (arg)); | |
c2f47e15 | 9936 | return code == TREE_CODE (TREE_TYPE (arg)); |
7e15618b | 9937 | } |
0eb671f7 | 9938 | |
75a70cf9 | 9939 | /* This function validates the types of a function call argument list |
9940 | against a specified list of tree_codes. If the last specifier is a 0, | |
9941 | that represents an ellipses, otherwise the last specifier must be a | |
9942 | VOID_TYPE. | |
9943 | ||
9944 | This is the GIMPLE version of validate_arglist. Eventually we want to | |
9945 | completely convert builtins.c to work from GIMPLEs and the tree based | |
9946 | validate_arglist will then be removed. */ | |
9947 | ||
9948 | bool | |
1a91d914 | 9949 | validate_gimple_arglist (const gcall *call, ...) |
75a70cf9 | 9950 | { |
9951 | enum tree_code code; | |
9952 | bool res = 0; | |
9953 | va_list ap; | |
9954 | const_tree arg; | |
9955 | size_t i; | |
9956 | ||
9957 | va_start (ap, call); | |
9958 | i = 0; | |
9959 | ||
9960 | do | |
9961 | { | |
d62e827b | 9962 | code = (enum tree_code) va_arg (ap, int); |
75a70cf9 | 9963 | switch (code) |
9964 | { | |
9965 | case 0: | |
9966 | /* This signifies an ellipses, any further arguments are all ok. */ | |
9967 | res = true; | |
9968 | goto end; | |
9969 | case VOID_TYPE: | |
9970 | /* This signifies an endlink, if no arguments remain, return | |
9971 | true, otherwise return false. */ | |
9972 | res = (i == gimple_call_num_args (call)); | |
9973 | goto end; | |
9974 | default: | |
9975 | /* If no parameters remain or the parameter's code does not | |
9976 | match the specified code, return false. Otherwise continue | |
9977 | checking any remaining arguments. */ | |
9978 | arg = gimple_call_arg (call, i++); | |
9979 | if (!validate_arg (arg, code)) | |
9980 | goto end; | |
9981 | break; | |
9982 | } | |
9983 | } | |
9984 | while (1); | |
9985 | ||
9986 | /* We need gotos here since we can only have one VA_CLOSE in a | |
9987 | function. */ | |
9988 | end: ; | |
9989 | va_end (ap); | |
9990 | ||
9991 | return res; | |
9992 | } | |
9993 | ||
fc2a2dcb | 9994 | /* Default target-specific builtin expander that does nothing. */ |
9995 | ||
9996 | rtx | |
aecda0d6 | 9997 | default_expand_builtin (tree exp ATTRIBUTE_UNUSED, |
9998 | rtx target ATTRIBUTE_UNUSED, | |
9999 | rtx subtarget ATTRIBUTE_UNUSED, | |
3754d046 | 10000 | machine_mode mode ATTRIBUTE_UNUSED, |
aecda0d6 | 10001 | int ignore ATTRIBUTE_UNUSED) |
fc2a2dcb | 10002 | { |
10003 | return NULL_RTX; | |
10004 | } | |
c7926a82 | 10005 | |
01537105 | 10006 | /* Returns true is EXP represents data that would potentially reside |
10007 | in a readonly section. */ | |
10008 | ||
b9ea678c | 10009 | bool |
01537105 | 10010 | readonly_data_expr (tree exp) |
10011 | { | |
10012 | STRIP_NOPS (exp); | |
10013 | ||
9ff0637e | 10014 | if (TREE_CODE (exp) != ADDR_EXPR) |
10015 | return false; | |
10016 | ||
10017 | exp = get_base_address (TREE_OPERAND (exp, 0)); | |
10018 | if (!exp) | |
10019 | return false; | |
10020 | ||
10021 | /* Make sure we call decl_readonly_section only for trees it | |
10022 | can handle (since it returns true for everything it doesn't | |
10023 | understand). */ | |
491e04ef | 10024 | if (TREE_CODE (exp) == STRING_CST |
9ff0637e | 10025 | || TREE_CODE (exp) == CONSTRUCTOR |
53e9c5c4 | 10026 | || (VAR_P (exp) && TREE_STATIC (exp))) |
9ff0637e | 10027 | return decl_readonly_section (exp, 0); |
01537105 | 10028 | else |
10029 | return false; | |
10030 | } | |
4ee9c684 | 10031 | |
c2f47e15 | 10032 | /* Simplify a call to the strpbrk builtin. S1 and S2 are the arguments |
10033 | to the call, and TYPE is its return type. | |
4ee9c684 | 10034 | |
c2f47e15 | 10035 | Return NULL_TREE if no simplification was possible, otherwise return the |
4ee9c684 | 10036 | simplified form of the call as a tree. |
10037 | ||
10038 | The simplified form may be a constant or other expression which | |
10039 | computes the same value, but in a more efficient manner (including | |
10040 | calls to other builtin functions). | |
10041 | ||
10042 | The call may contain arguments which need to be evaluated, but | |
10043 | which are not useful to determine the result of the call. In | |
10044 | this case we return a chain of COMPOUND_EXPRs. The LHS of each | |
10045 | COMPOUND_EXPR will be an argument which must be evaluated. | |
10046 | COMPOUND_EXPRs are chained through their RHS. The RHS of the last | |
10047 | COMPOUND_EXPR in the chain will contain the tree for the simplified | |
10048 | form of the builtin function call. */ | |
10049 | ||
10050 | static tree | |
389dd41b | 10051 | fold_builtin_strpbrk (location_t loc, tree s1, tree s2, tree type) |
4ee9c684 | 10052 | { |
c2f47e15 | 10053 | if (!validate_arg (s1, POINTER_TYPE) |
10054 | || !validate_arg (s2, POINTER_TYPE)) | |
10055 | return NULL_TREE; | |
4ee9c684 | 10056 | else |
10057 | { | |
4ee9c684 | 10058 | tree fn; |
10059 | const char *p1, *p2; | |
10060 | ||
10061 | p2 = c_getstr (s2); | |
10062 | if (p2 == NULL) | |
c2f47e15 | 10063 | return NULL_TREE; |
4ee9c684 | 10064 | |
10065 | p1 = c_getstr (s1); | |
10066 | if (p1 != NULL) | |
10067 | { | |
10068 | const char *r = strpbrk (p1, p2); | |
daa1d5f5 | 10069 | tree tem; |
4ee9c684 | 10070 | |
10071 | if (r == NULL) | |
779b4c41 | 10072 | return build_int_cst (TREE_TYPE (s1), 0); |
4ee9c684 | 10073 | |
10074 | /* Return an offset into the constant string argument. */ | |
2cc66f2a | 10075 | tem = fold_build_pointer_plus_hwi_loc (loc, s1, r - p1); |
389dd41b | 10076 | return fold_convert_loc (loc, type, tem); |
4ee9c684 | 10077 | } |
10078 | ||
10079 | if (p2[0] == '\0') | |
05abc81b | 10080 | /* strpbrk(x, "") == NULL. |
10081 | Evaluate and ignore s1 in case it had side-effects. */ | |
44bfe16d | 10082 | return omit_one_operand_loc (loc, type, integer_zero_node, s1); |
4ee9c684 | 10083 | |
10084 | if (p2[1] != '\0') | |
c2f47e15 | 10085 | return NULL_TREE; /* Really call strpbrk. */ |
4ee9c684 | 10086 | |
b9a16870 | 10087 | fn = builtin_decl_implicit (BUILT_IN_STRCHR); |
4ee9c684 | 10088 | if (!fn) |
c2f47e15 | 10089 | return NULL_TREE; |
4ee9c684 | 10090 | |
10091 | /* New argument list transforming strpbrk(s1, s2) to | |
10092 | strchr(s1, s2[0]). */ | |
7002a1c8 | 10093 | return build_call_expr_loc (loc, fn, 2, s1, |
10094 | build_int_cst (integer_type_node, p2[0])); | |
4ee9c684 | 10095 | } |
10096 | } | |
10097 | ||
c2f47e15 | 10098 | /* Simplify a call to the strspn builtin. S1 and S2 are the arguments |
10099 | to the call. | |
4ee9c684 | 10100 | |
c2f47e15 | 10101 | Return NULL_TREE if no simplification was possible, otherwise return the |
4ee9c684 | 10102 | simplified form of the call as a tree. |
10103 | ||
10104 | The simplified form may be a constant or other expression which | |
10105 | computes the same value, but in a more efficient manner (including | |
10106 | calls to other builtin functions). | |
10107 | ||
10108 | The call may contain arguments which need to be evaluated, but | |
10109 | which are not useful to determine the result of the call. In | |
10110 | this case we return a chain of COMPOUND_EXPRs. The LHS of each | |
10111 | COMPOUND_EXPR will be an argument which must be evaluated. | |
10112 | COMPOUND_EXPRs are chained through their RHS. The RHS of the last | |
10113 | COMPOUND_EXPR in the chain will contain the tree for the simplified | |
10114 | form of the builtin function call. */ | |
10115 | ||
10116 | static tree | |
389dd41b | 10117 | fold_builtin_strspn (location_t loc, tree s1, tree s2) |
4ee9c684 | 10118 | { |
c2f47e15 | 10119 | if (!validate_arg (s1, POINTER_TYPE) |
10120 | || !validate_arg (s2, POINTER_TYPE)) | |
10121 | return NULL_TREE; | |
4ee9c684 | 10122 | else |
10123 | { | |
4ee9c684 | 10124 | const char *p1 = c_getstr (s1), *p2 = c_getstr (s2); |
10125 | ||
c2f47e15 | 10126 | /* If either argument is "", return NULL_TREE. */ |
4ee9c684 | 10127 | if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0')) |
9bc9f15f | 10128 | /* Evaluate and ignore both arguments in case either one has |
10129 | side-effects. */ | |
389dd41b | 10130 | return omit_two_operands_loc (loc, size_type_node, size_zero_node, |
9bc9f15f | 10131 | s1, s2); |
c2f47e15 | 10132 | return NULL_TREE; |
4ee9c684 | 10133 | } |
10134 | } | |
10135 | ||
c2f47e15 | 10136 | /* Simplify a call to the strcspn builtin. S1 and S2 are the arguments |
10137 | to the call. | |
4ee9c684 | 10138 | |
c2f47e15 | 10139 | Return NULL_TREE if no simplification was possible, otherwise return the |
4ee9c684 | 10140 | simplified form of the call as a tree. |
10141 | ||
10142 | The simplified form may be a constant or other expression which | |
10143 | computes the same value, but in a more efficient manner (including | |
10144 | calls to other builtin functions). | |
10145 | ||
10146 | The call may contain arguments which need to be evaluated, but | |
10147 | which are not useful to determine the result of the call. In | |
10148 | this case we return a chain of COMPOUND_EXPRs. The LHS of each | |
10149 | COMPOUND_EXPR will be an argument which must be evaluated. | |
10150 | COMPOUND_EXPRs are chained through their RHS. The RHS of the last | |
10151 | COMPOUND_EXPR in the chain will contain the tree for the simplified | |
10152 | form of the builtin function call. */ | |
10153 | ||
10154 | static tree | |
389dd41b | 10155 | fold_builtin_strcspn (location_t loc, tree s1, tree s2) |
4ee9c684 | 10156 | { |
c2f47e15 | 10157 | if (!validate_arg (s1, POINTER_TYPE) |
10158 | || !validate_arg (s2, POINTER_TYPE)) | |
10159 | return NULL_TREE; | |
4ee9c684 | 10160 | else |
10161 | { | |
c2f47e15 | 10162 | /* If the first argument is "", return NULL_TREE. */ |
b5e46e2c | 10163 | const char *p1 = c_getstr (s1); |
4ee9c684 | 10164 | if (p1 && *p1 == '\0') |
10165 | { | |
10166 | /* Evaluate and ignore argument s2 in case it has | |
10167 | side-effects. */ | |
389dd41b | 10168 | return omit_one_operand_loc (loc, size_type_node, |
39761420 | 10169 | size_zero_node, s2); |
4ee9c684 | 10170 | } |
10171 | ||
10172 | /* If the second argument is "", return __builtin_strlen(s1). */ | |
b5e46e2c | 10173 | const char *p2 = c_getstr (s2); |
4ee9c684 | 10174 | if (p2 && *p2 == '\0') |
10175 | { | |
b9a16870 | 10176 | tree fn = builtin_decl_implicit (BUILT_IN_STRLEN); |
4ee9c684 | 10177 | |
10178 | /* If the replacement _DECL isn't initialized, don't do the | |
10179 | transformation. */ | |
10180 | if (!fn) | |
c2f47e15 | 10181 | return NULL_TREE; |
4ee9c684 | 10182 | |
389dd41b | 10183 | return build_call_expr_loc (loc, fn, 1, s1); |
4ee9c684 | 10184 | } |
c2f47e15 | 10185 | return NULL_TREE; |
4ee9c684 | 10186 | } |
10187 | } | |
10188 | ||
c2f47e15 | 10189 | /* Fold the next_arg or va_start call EXP. Returns true if there was an error |
743b0c6a | 10190 | produced. False otherwise. This is done so that we don't output the error |
10191 | or warning twice or three times. */ | |
75a70cf9 | 10192 | |
743b0c6a | 10193 | bool |
c2f47e15 | 10194 | fold_builtin_next_arg (tree exp, bool va_start_p) |
4ee9c684 | 10195 | { |
10196 | tree fntype = TREE_TYPE (current_function_decl); | |
c2f47e15 | 10197 | int nargs = call_expr_nargs (exp); |
10198 | tree arg; | |
d98fd4a4 | 10199 | /* There is good chance the current input_location points inside the |
10200 | definition of the va_start macro (perhaps on the token for | |
10201 | builtin) in a system header, so warnings will not be emitted. | |
10202 | Use the location in real source code. */ | |
10203 | source_location current_location = | |
10204 | linemap_unwind_to_first_non_reserved_loc (line_table, input_location, | |
10205 | NULL); | |
4ee9c684 | 10206 | |
257d99c3 | 10207 | if (!stdarg_p (fntype)) |
743b0c6a | 10208 | { |
10209 | error ("%<va_start%> used in function with fixed args"); | |
10210 | return true; | |
10211 | } | |
c2f47e15 | 10212 | |
10213 | if (va_start_p) | |
79012a9d | 10214 | { |
c2f47e15 | 10215 | if (va_start_p && (nargs != 2)) |
10216 | { | |
10217 | error ("wrong number of arguments to function %<va_start%>"); | |
10218 | return true; | |
10219 | } | |
10220 | arg = CALL_EXPR_ARG (exp, 1); | |
79012a9d | 10221 | } |
10222 | /* We use __builtin_va_start (ap, 0, 0) or __builtin_next_arg (0, 0) | |
10223 | when we checked the arguments and if needed issued a warning. */ | |
c2f47e15 | 10224 | else |
4ee9c684 | 10225 | { |
c2f47e15 | 10226 | if (nargs == 0) |
10227 | { | |
10228 | /* Evidently an out of date version of <stdarg.h>; can't validate | |
10229 | va_start's second argument, but can still work as intended. */ | |
d98fd4a4 | 10230 | warning_at (current_location, |
7edb1062 | 10231 | OPT_Wvarargs, |
10232 | "%<__builtin_next_arg%> called without an argument"); | |
c2f47e15 | 10233 | return true; |
10234 | } | |
10235 | else if (nargs > 1) | |
a0c938f0 | 10236 | { |
c2f47e15 | 10237 | error ("wrong number of arguments to function %<__builtin_next_arg%>"); |
a0c938f0 | 10238 | return true; |
10239 | } | |
c2f47e15 | 10240 | arg = CALL_EXPR_ARG (exp, 0); |
10241 | } | |
10242 | ||
a8dd994c | 10243 | if (TREE_CODE (arg) == SSA_NAME) |
10244 | arg = SSA_NAME_VAR (arg); | |
10245 | ||
c2f47e15 | 10246 | /* We destructively modify the call to be __builtin_va_start (ap, 0) |
48e1416a | 10247 | or __builtin_next_arg (0) the first time we see it, after checking |
c2f47e15 | 10248 | the arguments and if needed issuing a warning. */ |
10249 | if (!integer_zerop (arg)) | |
10250 | { | |
10251 | tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl)); | |
79012a9d | 10252 | |
4ee9c684 | 10253 | /* Strip off all nops for the sake of the comparison. This |
10254 | is not quite the same as STRIP_NOPS. It does more. | |
10255 | We must also strip off INDIRECT_EXPR for C++ reference | |
10256 | parameters. */ | |
72dd6141 | 10257 | while (CONVERT_EXPR_P (arg) |
4ee9c684 | 10258 | || TREE_CODE (arg) == INDIRECT_REF) |
10259 | arg = TREE_OPERAND (arg, 0); | |
10260 | if (arg != last_parm) | |
a0c938f0 | 10261 | { |
b08cf617 | 10262 | /* FIXME: Sometimes with the tree optimizers we can get the |
10263 | not the last argument even though the user used the last | |
10264 | argument. We just warn and set the arg to be the last | |
10265 | argument so that we will get wrong-code because of | |
10266 | it. */ | |
d98fd4a4 | 10267 | warning_at (current_location, |
7edb1062 | 10268 | OPT_Wvarargs, |
d98fd4a4 | 10269 | "second parameter of %<va_start%> not last named argument"); |
743b0c6a | 10270 | } |
24158ad7 | 10271 | |
10272 | /* Undefined by C99 7.15.1.4p4 (va_start): | |
10273 | "If the parameter parmN is declared with the register storage | |
10274 | class, with a function or array type, or with a type that is | |
10275 | not compatible with the type that results after application of | |
10276 | the default argument promotions, the behavior is undefined." | |
10277 | */ | |
10278 | else if (DECL_REGISTER (arg)) | |
d98fd4a4 | 10279 | { |
10280 | warning_at (current_location, | |
7edb1062 | 10281 | OPT_Wvarargs, |
67cf9b55 | 10282 | "undefined behavior when second parameter of " |
d98fd4a4 | 10283 | "%<va_start%> is declared with %<register%> storage"); |
10284 | } | |
24158ad7 | 10285 | |
79012a9d | 10286 | /* We want to verify the second parameter just once before the tree |
a0c938f0 | 10287 | optimizers are run and then avoid keeping it in the tree, |
10288 | as otherwise we could warn even for correct code like: | |
10289 | void foo (int i, ...) | |
10290 | { va_list ap; i++; va_start (ap, i); va_end (ap); } */ | |
c2f47e15 | 10291 | if (va_start_p) |
10292 | CALL_EXPR_ARG (exp, 1) = integer_zero_node; | |
10293 | else | |
10294 | CALL_EXPR_ARG (exp, 0) = integer_zero_node; | |
743b0c6a | 10295 | } |
10296 | return false; | |
4ee9c684 | 10297 | } |
10298 | ||
10299 | ||
c2f47e15 | 10300 | /* Expand a call EXP to __builtin_object_size. */ |
0a39fd54 | 10301 | |
f7715905 | 10302 | static rtx |
0a39fd54 | 10303 | expand_builtin_object_size (tree exp) |
10304 | { | |
10305 | tree ost; | |
10306 | int object_size_type; | |
10307 | tree fndecl = get_callee_fndecl (exp); | |
0a39fd54 | 10308 | |
c2f47e15 | 10309 | if (!validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
0a39fd54 | 10310 | { |
8c41abe8 | 10311 | error ("%Kfirst argument of %qD must be a pointer, second integer constant", |
b8c23db3 | 10312 | exp, fndecl); |
0a39fd54 | 10313 | expand_builtin_trap (); |
10314 | return const0_rtx; | |
10315 | } | |
10316 | ||
c2f47e15 | 10317 | ost = CALL_EXPR_ARG (exp, 1); |
0a39fd54 | 10318 | STRIP_NOPS (ost); |
10319 | ||
10320 | if (TREE_CODE (ost) != INTEGER_CST | |
10321 | || tree_int_cst_sgn (ost) < 0 | |
10322 | || compare_tree_int (ost, 3) > 0) | |
10323 | { | |
8c41abe8 | 10324 | error ("%Klast argument of %qD is not integer constant between 0 and 3", |
b8c23db3 | 10325 | exp, fndecl); |
0a39fd54 | 10326 | expand_builtin_trap (); |
10327 | return const0_rtx; | |
10328 | } | |
10329 | ||
e913b5cd | 10330 | object_size_type = tree_to_shwi (ost); |
0a39fd54 | 10331 | |
10332 | return object_size_type < 2 ? constm1_rtx : const0_rtx; | |
10333 | } | |
10334 | ||
10335 | /* Expand EXP, a call to the __mem{cpy,pcpy,move,set}_chk builtin. | |
10336 | FCODE is the BUILT_IN_* to use. | |
c2f47e15 | 10337 | Return NULL_RTX if we failed; the caller should emit a normal call, |
0a39fd54 | 10338 | otherwise try to get the result in TARGET, if convenient (and in |
10339 | mode MODE if that's convenient). */ | |
10340 | ||
10341 | static rtx | |
3754d046 | 10342 | expand_builtin_memory_chk (tree exp, rtx target, machine_mode mode, |
0a39fd54 | 10343 | enum built_in_function fcode) |
10344 | { | |
c2f47e15 | 10345 | if (!validate_arglist (exp, |
0a39fd54 | 10346 | POINTER_TYPE, |
10347 | fcode == BUILT_IN_MEMSET_CHK | |
10348 | ? INTEGER_TYPE : POINTER_TYPE, | |
10349 | INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
c2f47e15 | 10350 | return NULL_RTX; |
0a39fd54 | 10351 | |
e6a18b5a | 10352 | tree dest = CALL_EXPR_ARG (exp, 0); |
10353 | tree src = CALL_EXPR_ARG (exp, 1); | |
10354 | tree len = CALL_EXPR_ARG (exp, 2); | |
10355 | tree size = CALL_EXPR_ARG (exp, 3); | |
0a39fd54 | 10356 | |
e6a18b5a | 10357 | bool sizes_ok = check_access (exp, dest, src, len, /*maxread=*/NULL_TREE, |
10358 | /*str=*/NULL_TREE, size); | |
5aef8938 | 10359 | |
10360 | if (!tree_fits_uhwi_p (size)) | |
c2f47e15 | 10361 | return NULL_RTX; |
0a39fd54 | 10362 | |
e913b5cd | 10363 | if (tree_fits_uhwi_p (len) || integer_all_onesp (size)) |
0a39fd54 | 10364 | { |
5aef8938 | 10365 | /* Avoid transforming the checking call to an ordinary one when |
10366 | an overflow has been detected or when the call couldn't be | |
10367 | validated because the size is not constant. */ | |
10368 | if (!sizes_ok && !integer_all_onesp (size) && tree_int_cst_lt (size, len)) | |
10369 | return NULL_RTX; | |
0a39fd54 | 10370 | |
5aef8938 | 10371 | tree fn = NULL_TREE; |
0a39fd54 | 10372 | /* If __builtin_mem{cpy,pcpy,move,set}_chk is used, assume |
10373 | mem{cpy,pcpy,move,set} is available. */ | |
10374 | switch (fcode) | |
10375 | { | |
10376 | case BUILT_IN_MEMCPY_CHK: | |
b9a16870 | 10377 | fn = builtin_decl_explicit (BUILT_IN_MEMCPY); |
0a39fd54 | 10378 | break; |
10379 | case BUILT_IN_MEMPCPY_CHK: | |
b9a16870 | 10380 | fn = builtin_decl_explicit (BUILT_IN_MEMPCPY); |
0a39fd54 | 10381 | break; |
10382 | case BUILT_IN_MEMMOVE_CHK: | |
b9a16870 | 10383 | fn = builtin_decl_explicit (BUILT_IN_MEMMOVE); |
0a39fd54 | 10384 | break; |
10385 | case BUILT_IN_MEMSET_CHK: | |
b9a16870 | 10386 | fn = builtin_decl_explicit (BUILT_IN_MEMSET); |
0a39fd54 | 10387 | break; |
10388 | default: | |
10389 | break; | |
10390 | } | |
10391 | ||
10392 | if (! fn) | |
c2f47e15 | 10393 | return NULL_RTX; |
0a39fd54 | 10394 | |
0568e9c1 | 10395 | fn = build_call_nofold_loc (EXPR_LOCATION (exp), fn, 3, dest, src, len); |
a65c4d64 | 10396 | gcc_assert (TREE_CODE (fn) == CALL_EXPR); |
10397 | CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp); | |
0a39fd54 | 10398 | return expand_expr (fn, target, mode, EXPAND_NORMAL); |
10399 | } | |
10400 | else if (fcode == BUILT_IN_MEMSET_CHK) | |
c2f47e15 | 10401 | return NULL_RTX; |
0a39fd54 | 10402 | else |
10403 | { | |
957d0361 | 10404 | unsigned int dest_align = get_pointer_alignment (dest); |
0a39fd54 | 10405 | |
10406 | /* If DEST is not a pointer type, call the normal function. */ | |
10407 | if (dest_align == 0) | |
c2f47e15 | 10408 | return NULL_RTX; |
0a39fd54 | 10409 | |
10410 | /* If SRC and DEST are the same (and not volatile), do nothing. */ | |
10411 | if (operand_equal_p (src, dest, 0)) | |
10412 | { | |
10413 | tree expr; | |
10414 | ||
10415 | if (fcode != BUILT_IN_MEMPCPY_CHK) | |
10416 | { | |
10417 | /* Evaluate and ignore LEN in case it has side-effects. */ | |
10418 | expand_expr (len, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
10419 | return expand_expr (dest, target, mode, EXPAND_NORMAL); | |
10420 | } | |
10421 | ||
2cc66f2a | 10422 | expr = fold_build_pointer_plus (dest, len); |
0a39fd54 | 10423 | return expand_expr (expr, target, mode, EXPAND_NORMAL); |
10424 | } | |
10425 | ||
10426 | /* __memmove_chk special case. */ | |
10427 | if (fcode == BUILT_IN_MEMMOVE_CHK) | |
10428 | { | |
957d0361 | 10429 | unsigned int src_align = get_pointer_alignment (src); |
0a39fd54 | 10430 | |
10431 | if (src_align == 0) | |
c2f47e15 | 10432 | return NULL_RTX; |
0a39fd54 | 10433 | |
10434 | /* If src is categorized for a readonly section we can use | |
10435 | normal __memcpy_chk. */ | |
10436 | if (readonly_data_expr (src)) | |
10437 | { | |
b9a16870 | 10438 | tree fn = builtin_decl_explicit (BUILT_IN_MEMCPY_CHK); |
0a39fd54 | 10439 | if (!fn) |
c2f47e15 | 10440 | return NULL_RTX; |
0568e9c1 | 10441 | fn = build_call_nofold_loc (EXPR_LOCATION (exp), fn, 4, |
10442 | dest, src, len, size); | |
a65c4d64 | 10443 | gcc_assert (TREE_CODE (fn) == CALL_EXPR); |
10444 | CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp); | |
0a39fd54 | 10445 | return expand_expr (fn, target, mode, EXPAND_NORMAL); |
10446 | } | |
10447 | } | |
c2f47e15 | 10448 | return NULL_RTX; |
0a39fd54 | 10449 | } |
10450 | } | |
10451 | ||
10452 | /* Emit warning if a buffer overflow is detected at compile time. */ | |
10453 | ||
10454 | static void | |
10455 | maybe_emit_chk_warning (tree exp, enum built_in_function fcode) | |
10456 | { | |
5aef8938 | 10457 | /* The source string. */ |
10458 | tree srcstr = NULL_TREE; | |
10459 | /* The size of the destination object. */ | |
10460 | tree objsize = NULL_TREE; | |
10461 | /* The string that is being concatenated with (as in __strcat_chk) | |
10462 | or null if it isn't. */ | |
10463 | tree catstr = NULL_TREE; | |
10464 | /* The maximum length of the source sequence in a bounded operation | |
10465 | (such as __strncat_chk) or null if the operation isn't bounded | |
10466 | (such as __strcat_chk). */ | |
e6a18b5a | 10467 | tree maxread = NULL_TREE; |
f3969b49 | 10468 | /* The exact size of the access (such as in __strncpy_chk). */ |
10469 | tree size = NULL_TREE; | |
0a39fd54 | 10470 | |
10471 | switch (fcode) | |
10472 | { | |
10473 | case BUILT_IN_STRCPY_CHK: | |
10474 | case BUILT_IN_STPCPY_CHK: | |
5aef8938 | 10475 | srcstr = CALL_EXPR_ARG (exp, 1); |
10476 | objsize = CALL_EXPR_ARG (exp, 2); | |
10477 | break; | |
10478 | ||
0a39fd54 | 10479 | case BUILT_IN_STRCAT_CHK: |
5aef8938 | 10480 | /* For __strcat_chk the warning will be emitted only if overflowing |
10481 | by at least strlen (dest) + 1 bytes. */ | |
10482 | catstr = CALL_EXPR_ARG (exp, 0); | |
10483 | srcstr = CALL_EXPR_ARG (exp, 1); | |
10484 | objsize = CALL_EXPR_ARG (exp, 2); | |
0a39fd54 | 10485 | break; |
5aef8938 | 10486 | |
b356dfef | 10487 | case BUILT_IN_STRNCAT_CHK: |
5aef8938 | 10488 | catstr = CALL_EXPR_ARG (exp, 0); |
10489 | srcstr = CALL_EXPR_ARG (exp, 1); | |
e6a18b5a | 10490 | maxread = CALL_EXPR_ARG (exp, 2); |
5aef8938 | 10491 | objsize = CALL_EXPR_ARG (exp, 3); |
10492 | break; | |
10493 | ||
0a39fd54 | 10494 | case BUILT_IN_STRNCPY_CHK: |
1063acde | 10495 | case BUILT_IN_STPNCPY_CHK: |
5aef8938 | 10496 | srcstr = CALL_EXPR_ARG (exp, 1); |
f3969b49 | 10497 | size = CALL_EXPR_ARG (exp, 2); |
5aef8938 | 10498 | objsize = CALL_EXPR_ARG (exp, 3); |
0a39fd54 | 10499 | break; |
5aef8938 | 10500 | |
0a39fd54 | 10501 | case BUILT_IN_SNPRINTF_CHK: |
10502 | case BUILT_IN_VSNPRINTF_CHK: | |
e6a18b5a | 10503 | maxread = CALL_EXPR_ARG (exp, 1); |
5aef8938 | 10504 | objsize = CALL_EXPR_ARG (exp, 3); |
0a39fd54 | 10505 | break; |
10506 | default: | |
10507 | gcc_unreachable (); | |
10508 | } | |
10509 | ||
e6a18b5a | 10510 | if (catstr && maxread) |
0a39fd54 | 10511 | { |
5aef8938 | 10512 | /* Check __strncat_chk. There is no way to determine the length |
10513 | of the string to which the source string is being appended so | |
10514 | just warn when the length of the source string is not known. */ | |
8d6c6ef5 | 10515 | check_strncat_sizes (exp, objsize); |
10516 | return; | |
0a39fd54 | 10517 | } |
0a39fd54 | 10518 | |
e6a18b5a | 10519 | /* The destination argument is the first one for all built-ins above. */ |
10520 | tree dst = CALL_EXPR_ARG (exp, 0); | |
10521 | ||
10522 | check_access (exp, dst, srcstr, size, maxread, srcstr, objsize); | |
0a39fd54 | 10523 | } |
10524 | ||
10525 | /* Emit warning if a buffer overflow is detected at compile time | |
10526 | in __sprintf_chk/__vsprintf_chk calls. */ | |
10527 | ||
10528 | static void | |
10529 | maybe_emit_sprintf_chk_warning (tree exp, enum built_in_function fcode) | |
10530 | { | |
1e4adcfc | 10531 | tree size, len, fmt; |
0a39fd54 | 10532 | const char *fmt_str; |
c2f47e15 | 10533 | int nargs = call_expr_nargs (exp); |
0a39fd54 | 10534 | |
10535 | /* Verify the required arguments in the original call. */ | |
48e1416a | 10536 | |
c2f47e15 | 10537 | if (nargs < 4) |
0a39fd54 | 10538 | return; |
c2f47e15 | 10539 | size = CALL_EXPR_ARG (exp, 2); |
10540 | fmt = CALL_EXPR_ARG (exp, 3); | |
0a39fd54 | 10541 | |
e913b5cd | 10542 | if (! tree_fits_uhwi_p (size) || integer_all_onesp (size)) |
0a39fd54 | 10543 | return; |
10544 | ||
10545 | /* Check whether the format is a literal string constant. */ | |
10546 | fmt_str = c_getstr (fmt); | |
10547 | if (fmt_str == NULL) | |
10548 | return; | |
10549 | ||
d4473c84 | 10550 | if (!init_target_chars ()) |
99eabcc1 | 10551 | return; |
10552 | ||
0a39fd54 | 10553 | /* If the format doesn't contain % args or %%, we know its size. */ |
99eabcc1 | 10554 | if (strchr (fmt_str, target_percent) == 0) |
0a39fd54 | 10555 | len = build_int_cstu (size_type_node, strlen (fmt_str)); |
10556 | /* If the format is "%s" and first ... argument is a string literal, | |
10557 | we know it too. */ | |
c2f47e15 | 10558 | else if (fcode == BUILT_IN_SPRINTF_CHK |
10559 | && strcmp (fmt_str, target_percent_s) == 0) | |
0a39fd54 | 10560 | { |
10561 | tree arg; | |
10562 | ||
c2f47e15 | 10563 | if (nargs < 5) |
0a39fd54 | 10564 | return; |
c2f47e15 | 10565 | arg = CALL_EXPR_ARG (exp, 4); |
0a39fd54 | 10566 | if (! POINTER_TYPE_P (TREE_TYPE (arg))) |
10567 | return; | |
10568 | ||
10569 | len = c_strlen (arg, 1); | |
e913b5cd | 10570 | if (!len || ! tree_fits_uhwi_p (len)) |
0a39fd54 | 10571 | return; |
10572 | } | |
10573 | else | |
10574 | return; | |
10575 | ||
5aef8938 | 10576 | /* Add one for the terminating nul. */ |
10577 | len = fold_build2 (PLUS_EXPR, TREE_TYPE (len), len, size_one_node); | |
e6a18b5a | 10578 | |
10579 | check_access (exp, /*dst=*/NULL_TREE, /*src=*/NULL_TREE, /*size=*/NULL_TREE, | |
10580 | /*maxread=*/NULL_TREE, len, size); | |
0a39fd54 | 10581 | } |
10582 | ||
2c281b15 | 10583 | /* Emit warning if a free is called with address of a variable. */ |
10584 | ||
10585 | static void | |
10586 | maybe_emit_free_warning (tree exp) | |
10587 | { | |
10588 | tree arg = CALL_EXPR_ARG (exp, 0); | |
10589 | ||
10590 | STRIP_NOPS (arg); | |
10591 | if (TREE_CODE (arg) != ADDR_EXPR) | |
10592 | return; | |
10593 | ||
10594 | arg = get_base_address (TREE_OPERAND (arg, 0)); | |
182cf5a9 | 10595 | if (arg == NULL || INDIRECT_REF_P (arg) || TREE_CODE (arg) == MEM_REF) |
2c281b15 | 10596 | return; |
10597 | ||
10598 | if (SSA_VAR_P (arg)) | |
f74ea1c2 | 10599 | warning_at (tree_nonartificial_location (exp), OPT_Wfree_nonheap_object, |
10600 | "%Kattempt to free a non-heap object %qD", exp, arg); | |
2c281b15 | 10601 | else |
f74ea1c2 | 10602 | warning_at (tree_nonartificial_location (exp), OPT_Wfree_nonheap_object, |
10603 | "%Kattempt to free a non-heap object", exp); | |
2c281b15 | 10604 | } |
10605 | ||
c2f47e15 | 10606 | /* Fold a call to __builtin_object_size with arguments PTR and OST, |
10607 | if possible. */ | |
0a39fd54 | 10608 | |
f7715905 | 10609 | static tree |
c2f47e15 | 10610 | fold_builtin_object_size (tree ptr, tree ost) |
0a39fd54 | 10611 | { |
a6caa15f | 10612 | unsigned HOST_WIDE_INT bytes; |
0a39fd54 | 10613 | int object_size_type; |
10614 | ||
c2f47e15 | 10615 | if (!validate_arg (ptr, POINTER_TYPE) |
10616 | || !validate_arg (ost, INTEGER_TYPE)) | |
10617 | return NULL_TREE; | |
0a39fd54 | 10618 | |
0a39fd54 | 10619 | STRIP_NOPS (ost); |
10620 | ||
10621 | if (TREE_CODE (ost) != INTEGER_CST | |
10622 | || tree_int_cst_sgn (ost) < 0 | |
10623 | || compare_tree_int (ost, 3) > 0) | |
c2f47e15 | 10624 | return NULL_TREE; |
0a39fd54 | 10625 | |
e913b5cd | 10626 | object_size_type = tree_to_shwi (ost); |
0a39fd54 | 10627 | |
10628 | /* __builtin_object_size doesn't evaluate side-effects in its arguments; | |
10629 | if there are any side-effects, it returns (size_t) -1 for types 0 and 1 | |
10630 | and (size_t) 0 for types 2 and 3. */ | |
10631 | if (TREE_SIDE_EFFECTS (ptr)) | |
697bbc3f | 10632 | return build_int_cst_type (size_type_node, object_size_type < 2 ? -1 : 0); |
0a39fd54 | 10633 | |
10634 | if (TREE_CODE (ptr) == ADDR_EXPR) | |
a6caa15f | 10635 | { |
4e91a07b | 10636 | compute_builtin_object_size (ptr, object_size_type, &bytes); |
6da74b21 | 10637 | if (wi::fits_to_tree_p (bytes, size_type_node)) |
10638 | return build_int_cstu (size_type_node, bytes); | |
a6caa15f | 10639 | } |
0a39fd54 | 10640 | else if (TREE_CODE (ptr) == SSA_NAME) |
10641 | { | |
0a39fd54 | 10642 | /* If object size is not known yet, delay folding until |
10643 | later. Maybe subsequent passes will help determining | |
10644 | it. */ | |
4e91a07b | 10645 | if (compute_builtin_object_size (ptr, object_size_type, &bytes) |
10646 | && wi::fits_to_tree_p (bytes, size_type_node)) | |
6da74b21 | 10647 | return build_int_cstu (size_type_node, bytes); |
0a39fd54 | 10648 | } |
10649 | ||
a6caa15f | 10650 | return NULL_TREE; |
0a39fd54 | 10651 | } |
10652 | ||
12f08300 | 10653 | /* Builtins with folding operations that operate on "..." arguments |
10654 | need special handling; we need to store the arguments in a convenient | |
10655 | data structure before attempting any folding. Fortunately there are | |
10656 | only a few builtins that fall into this category. FNDECL is the | |
10657 | function, EXP is the CALL_EXPR for the call. */ | |
10658 | ||
10659 | static tree | |
10660 | fold_builtin_varargs (location_t loc, tree fndecl, tree *args, int nargs) | |
10661 | { | |
10662 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
10663 | tree ret = NULL_TREE; | |
10664 | ||
10665 | switch (fcode) | |
10666 | { | |
10667 | case BUILT_IN_FPCLASSIFY: | |
10668 | ret = fold_builtin_fpclassify (loc, args, nargs); | |
10669 | break; | |
10670 | ||
10671 | default: | |
10672 | break; | |
10673 | } | |
10674 | if (ret) | |
10675 | { | |
10676 | ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret); | |
10677 | SET_EXPR_LOCATION (ret, loc); | |
10678 | TREE_NO_WARNING (ret) = 1; | |
10679 | return ret; | |
10680 | } | |
10681 | return NULL_TREE; | |
10682 | } | |
10683 | ||
99eabcc1 | 10684 | /* Initialize format string characters in the target charset. */ |
10685 | ||
b9ea678c | 10686 | bool |
99eabcc1 | 10687 | init_target_chars (void) |
10688 | { | |
10689 | static bool init; | |
10690 | if (!init) | |
10691 | { | |
10692 | target_newline = lang_hooks.to_target_charset ('\n'); | |
10693 | target_percent = lang_hooks.to_target_charset ('%'); | |
10694 | target_c = lang_hooks.to_target_charset ('c'); | |
10695 | target_s = lang_hooks.to_target_charset ('s'); | |
10696 | if (target_newline == 0 || target_percent == 0 || target_c == 0 | |
10697 | || target_s == 0) | |
10698 | return false; | |
10699 | ||
10700 | target_percent_c[0] = target_percent; | |
10701 | target_percent_c[1] = target_c; | |
10702 | target_percent_c[2] = '\0'; | |
10703 | ||
10704 | target_percent_s[0] = target_percent; | |
10705 | target_percent_s[1] = target_s; | |
10706 | target_percent_s[2] = '\0'; | |
10707 | ||
10708 | target_percent_s_newline[0] = target_percent; | |
10709 | target_percent_s_newline[1] = target_s; | |
10710 | target_percent_s_newline[2] = target_newline; | |
10711 | target_percent_s_newline[3] = '\0'; | |
a0c938f0 | 10712 | |
99eabcc1 | 10713 | init = true; |
10714 | } | |
10715 | return true; | |
10716 | } | |
bffb7645 | 10717 | |
f0c477f2 | 10718 | /* Helper function for do_mpfr_arg*(). Ensure M is a normal number |
10719 | and no overflow/underflow occurred. INEXACT is true if M was not | |
fa7637bd | 10720 | exactly calculated. TYPE is the tree type for the result. This |
f0c477f2 | 10721 | function assumes that you cleared the MPFR flags and then |
10722 | calculated M to see if anything subsequently set a flag prior to | |
10723 | entering this function. Return NULL_TREE if any checks fail. */ | |
10724 | ||
10725 | static tree | |
d4473c84 | 10726 | do_mpfr_ckconv (mpfr_srcptr m, tree type, int inexact) |
f0c477f2 | 10727 | { |
10728 | /* Proceed iff we get a normal number, i.e. not NaN or Inf and no | |
10729 | overflow/underflow occurred. If -frounding-math, proceed iff the | |
10730 | result of calling FUNC was exact. */ | |
d4473c84 | 10731 | if (mpfr_number_p (m) && !mpfr_overflow_p () && !mpfr_underflow_p () |
f0c477f2 | 10732 | && (!flag_rounding_math || !inexact)) |
10733 | { | |
10734 | REAL_VALUE_TYPE rr; | |
10735 | ||
66fa16e6 | 10736 | real_from_mpfr (&rr, m, type, GMP_RNDN); |
f0c477f2 | 10737 | /* Proceed iff GCC's REAL_VALUE_TYPE can hold the MPFR value, |
10738 | check for overflow/underflow. If the REAL_VALUE_TYPE is zero | |
10739 | but the mpft_t is not, then we underflowed in the | |
10740 | conversion. */ | |
776a7bab | 10741 | if (real_isfinite (&rr) |
f0c477f2 | 10742 | && (rr.cl == rvc_zero) == (mpfr_zero_p (m) != 0)) |
10743 | { | |
10744 | REAL_VALUE_TYPE rmode; | |
10745 | ||
10746 | real_convert (&rmode, TYPE_MODE (type), &rr); | |
10747 | /* Proceed iff the specified mode can hold the value. */ | |
10748 | if (real_identical (&rmode, &rr)) | |
10749 | return build_real (type, rmode); | |
10750 | } | |
10751 | } | |
10752 | return NULL_TREE; | |
10753 | } | |
10754 | ||
239d491a | 10755 | /* Helper function for do_mpc_arg*(). Ensure M is a normal complex |
10756 | number and no overflow/underflow occurred. INEXACT is true if M | |
10757 | was not exactly calculated. TYPE is the tree type for the result. | |
10758 | This function assumes that you cleared the MPFR flags and then | |
10759 | calculated M to see if anything subsequently set a flag prior to | |
652d9409 | 10760 | entering this function. Return NULL_TREE if any checks fail, if |
10761 | FORCE_CONVERT is true, then bypass the checks. */ | |
239d491a | 10762 | |
10763 | static tree | |
652d9409 | 10764 | do_mpc_ckconv (mpc_srcptr m, tree type, int inexact, int force_convert) |
239d491a | 10765 | { |
10766 | /* Proceed iff we get a normal number, i.e. not NaN or Inf and no | |
10767 | overflow/underflow occurred. If -frounding-math, proceed iff the | |
10768 | result of calling FUNC was exact. */ | |
652d9409 | 10769 | if (force_convert |
10770 | || (mpfr_number_p (mpc_realref (m)) && mpfr_number_p (mpc_imagref (m)) | |
10771 | && !mpfr_overflow_p () && !mpfr_underflow_p () | |
10772 | && (!flag_rounding_math || !inexact))) | |
239d491a | 10773 | { |
10774 | REAL_VALUE_TYPE re, im; | |
10775 | ||
b0e7c4d4 | 10776 | real_from_mpfr (&re, mpc_realref (m), TREE_TYPE (type), GMP_RNDN); |
10777 | real_from_mpfr (&im, mpc_imagref (m), TREE_TYPE (type), GMP_RNDN); | |
239d491a | 10778 | /* Proceed iff GCC's REAL_VALUE_TYPE can hold the MPFR values, |
10779 | check for overflow/underflow. If the REAL_VALUE_TYPE is zero | |
10780 | but the mpft_t is not, then we underflowed in the | |
10781 | conversion. */ | |
652d9409 | 10782 | if (force_convert |
10783 | || (real_isfinite (&re) && real_isfinite (&im) | |
10784 | && (re.cl == rvc_zero) == (mpfr_zero_p (mpc_realref (m)) != 0) | |
10785 | && (im.cl == rvc_zero) == (mpfr_zero_p (mpc_imagref (m)) != 0))) | |
239d491a | 10786 | { |
10787 | REAL_VALUE_TYPE re_mode, im_mode; | |
10788 | ||
10789 | real_convert (&re_mode, TYPE_MODE (TREE_TYPE (type)), &re); | |
10790 | real_convert (&im_mode, TYPE_MODE (TREE_TYPE (type)), &im); | |
10791 | /* Proceed iff the specified mode can hold the value. */ | |
652d9409 | 10792 | if (force_convert |
10793 | || (real_identical (&re_mode, &re) | |
10794 | && real_identical (&im_mode, &im))) | |
239d491a | 10795 | return build_complex (type, build_real (TREE_TYPE (type), re_mode), |
10796 | build_real (TREE_TYPE (type), im_mode)); | |
10797 | } | |
10798 | } | |
10799 | return NULL_TREE; | |
10800 | } | |
239d491a | 10801 | |
e5407ca6 | 10802 | /* If arguments ARG0 and ARG1 are REAL_CSTs, call mpfr_remquo() to set |
10803 | the pointer *(ARG_QUO) and return the result. The type is taken | |
10804 | from the type of ARG0 and is used for setting the precision of the | |
10805 | calculation and results. */ | |
10806 | ||
10807 | static tree | |
10808 | do_mpfr_remquo (tree arg0, tree arg1, tree arg_quo) | |
10809 | { | |
10810 | tree const type = TREE_TYPE (arg0); | |
10811 | tree result = NULL_TREE; | |
48e1416a | 10812 | |
e5407ca6 | 10813 | STRIP_NOPS (arg0); |
10814 | STRIP_NOPS (arg1); | |
48e1416a | 10815 | |
e5407ca6 | 10816 | /* To proceed, MPFR must exactly represent the target floating point |
10817 | format, which only happens when the target base equals two. */ | |
10818 | if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2 | |
10819 | && TREE_CODE (arg0) == REAL_CST && !TREE_OVERFLOW (arg0) | |
10820 | && TREE_CODE (arg1) == REAL_CST && !TREE_OVERFLOW (arg1)) | |
10821 | { | |
10822 | const REAL_VALUE_TYPE *const ra0 = TREE_REAL_CST_PTR (arg0); | |
10823 | const REAL_VALUE_TYPE *const ra1 = TREE_REAL_CST_PTR (arg1); | |
10824 | ||
776a7bab | 10825 | if (real_isfinite (ra0) && real_isfinite (ra1)) |
e5407ca6 | 10826 | { |
e2eb2b7f | 10827 | const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type)); |
10828 | const int prec = fmt->p; | |
10829 | const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN; | |
e5407ca6 | 10830 | tree result_rem; |
10831 | long integer_quo; | |
10832 | mpfr_t m0, m1; | |
10833 | ||
10834 | mpfr_inits2 (prec, m0, m1, NULL); | |
10835 | mpfr_from_real (m0, ra0, GMP_RNDN); | |
10836 | mpfr_from_real (m1, ra1, GMP_RNDN); | |
10837 | mpfr_clear_flags (); | |
e2eb2b7f | 10838 | mpfr_remquo (m0, &integer_quo, m0, m1, rnd); |
e5407ca6 | 10839 | /* Remquo is independent of the rounding mode, so pass |
10840 | inexact=0 to do_mpfr_ckconv(). */ | |
10841 | result_rem = do_mpfr_ckconv (m0, type, /*inexact=*/ 0); | |
10842 | mpfr_clears (m0, m1, NULL); | |
10843 | if (result_rem) | |
10844 | { | |
10845 | /* MPFR calculates quo in the host's long so it may | |
10846 | return more bits in quo than the target int can hold | |
10847 | if sizeof(host long) > sizeof(target int). This can | |
10848 | happen even for native compilers in LP64 mode. In | |
10849 | these cases, modulo the quo value with the largest | |
10850 | number that the target int can hold while leaving one | |
10851 | bit for the sign. */ | |
10852 | if (sizeof (integer_quo) * CHAR_BIT > INT_TYPE_SIZE) | |
10853 | integer_quo %= (long)(1UL << (INT_TYPE_SIZE - 1)); | |
10854 | ||
10855 | /* Dereference the quo pointer argument. */ | |
10856 | arg_quo = build_fold_indirect_ref (arg_quo); | |
10857 | /* Proceed iff a valid pointer type was passed in. */ | |
10858 | if (TYPE_MAIN_VARIANT (TREE_TYPE (arg_quo)) == integer_type_node) | |
10859 | { | |
10860 | /* Set the value. */ | |
7002a1c8 | 10861 | tree result_quo |
10862 | = fold_build2 (MODIFY_EXPR, TREE_TYPE (arg_quo), arg_quo, | |
10863 | build_int_cst (TREE_TYPE (arg_quo), | |
10864 | integer_quo)); | |
e5407ca6 | 10865 | TREE_SIDE_EFFECTS (result_quo) = 1; |
10866 | /* Combine the quo assignment with the rem. */ | |
10867 | result = non_lvalue (fold_build2 (COMPOUND_EXPR, type, | |
10868 | result_quo, result_rem)); | |
10869 | } | |
10870 | } | |
10871 | } | |
10872 | } | |
10873 | return result; | |
10874 | } | |
e84da7c1 | 10875 | |
10876 | /* If ARG is a REAL_CST, call mpfr_lgamma() on it and return the | |
10877 | resulting value as a tree with type TYPE. The mpfr precision is | |
10878 | set to the precision of TYPE. We assume that this mpfr function | |
10879 | returns zero if the result could be calculated exactly within the | |
10880 | requested precision. In addition, the integer pointer represented | |
10881 | by ARG_SG will be dereferenced and set to the appropriate signgam | |
10882 | (-1,1) value. */ | |
10883 | ||
10884 | static tree | |
10885 | do_mpfr_lgamma_r (tree arg, tree arg_sg, tree type) | |
10886 | { | |
10887 | tree result = NULL_TREE; | |
10888 | ||
10889 | STRIP_NOPS (arg); | |
48e1416a | 10890 | |
e84da7c1 | 10891 | /* To proceed, MPFR must exactly represent the target floating point |
10892 | format, which only happens when the target base equals two. Also | |
10893 | verify ARG is a constant and that ARG_SG is an int pointer. */ | |
10894 | if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2 | |
10895 | && TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg) | |
10896 | && TREE_CODE (TREE_TYPE (arg_sg)) == POINTER_TYPE | |
10897 | && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (arg_sg))) == integer_type_node) | |
10898 | { | |
10899 | const REAL_VALUE_TYPE *const ra = TREE_REAL_CST_PTR (arg); | |
10900 | ||
10901 | /* In addition to NaN and Inf, the argument cannot be zero or a | |
10902 | negative integer. */ | |
776a7bab | 10903 | if (real_isfinite (ra) |
e84da7c1 | 10904 | && ra->cl != rvc_zero |
9af5ce0c | 10905 | && !(real_isneg (ra) && real_isinteger (ra, TYPE_MODE (type)))) |
e84da7c1 | 10906 | { |
e2eb2b7f | 10907 | const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type)); |
10908 | const int prec = fmt->p; | |
10909 | const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN; | |
e84da7c1 | 10910 | int inexact, sg; |
10911 | mpfr_t m; | |
10912 | tree result_lg; | |
10913 | ||
10914 | mpfr_init2 (m, prec); | |
10915 | mpfr_from_real (m, ra, GMP_RNDN); | |
10916 | mpfr_clear_flags (); | |
e2eb2b7f | 10917 | inexact = mpfr_lgamma (m, &sg, m, rnd); |
e84da7c1 | 10918 | result_lg = do_mpfr_ckconv (m, type, inexact); |
10919 | mpfr_clear (m); | |
10920 | if (result_lg) | |
10921 | { | |
10922 | tree result_sg; | |
10923 | ||
10924 | /* Dereference the arg_sg pointer argument. */ | |
10925 | arg_sg = build_fold_indirect_ref (arg_sg); | |
10926 | /* Assign the signgam value into *arg_sg. */ | |
10927 | result_sg = fold_build2 (MODIFY_EXPR, | |
10928 | TREE_TYPE (arg_sg), arg_sg, | |
7002a1c8 | 10929 | build_int_cst (TREE_TYPE (arg_sg), sg)); |
e84da7c1 | 10930 | TREE_SIDE_EFFECTS (result_sg) = 1; |
10931 | /* Combine the signgam assignment with the lgamma result. */ | |
10932 | result = non_lvalue (fold_build2 (COMPOUND_EXPR, type, | |
10933 | result_sg, result_lg)); | |
10934 | } | |
10935 | } | |
10936 | } | |
10937 | ||
10938 | return result; | |
10939 | } | |
75a70cf9 | 10940 | |
c699fab8 | 10941 | /* If arguments ARG0 and ARG1 are a COMPLEX_CST, call the two-argument |
10942 | mpc function FUNC on it and return the resulting value as a tree | |
10943 | with type TYPE. The mpfr precision is set to the precision of | |
10944 | TYPE. We assume that function FUNC returns zero if the result | |
652d9409 | 10945 | could be calculated exactly within the requested precision. If |
10946 | DO_NONFINITE is true, then fold expressions containing Inf or NaN | |
10947 | in the arguments and/or results. */ | |
c699fab8 | 10948 | |
63e89698 | 10949 | tree |
652d9409 | 10950 | do_mpc_arg2 (tree arg0, tree arg1, tree type, int do_nonfinite, |
c699fab8 | 10951 | int (*func)(mpc_ptr, mpc_srcptr, mpc_srcptr, mpc_rnd_t)) |
10952 | { | |
10953 | tree result = NULL_TREE; | |
48e1416a | 10954 | |
c699fab8 | 10955 | STRIP_NOPS (arg0); |
10956 | STRIP_NOPS (arg1); | |
10957 | ||
10958 | /* To proceed, MPFR must exactly represent the target floating point | |
10959 | format, which only happens when the target base equals two. */ | |
10960 | if (TREE_CODE (arg0) == COMPLEX_CST && !TREE_OVERFLOW (arg0) | |
10961 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg0))) == REAL_TYPE | |
10962 | && TREE_CODE (arg1) == COMPLEX_CST && !TREE_OVERFLOW (arg1) | |
10963 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg1))) == REAL_TYPE | |
10964 | && REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (TREE_TYPE (arg0))))->b == 2) | |
10965 | { | |
10966 | const REAL_VALUE_TYPE *const re0 = TREE_REAL_CST_PTR (TREE_REALPART (arg0)); | |
10967 | const REAL_VALUE_TYPE *const im0 = TREE_REAL_CST_PTR (TREE_IMAGPART (arg0)); | |
10968 | const REAL_VALUE_TYPE *const re1 = TREE_REAL_CST_PTR (TREE_REALPART (arg1)); | |
10969 | const REAL_VALUE_TYPE *const im1 = TREE_REAL_CST_PTR (TREE_IMAGPART (arg1)); | |
10970 | ||
652d9409 | 10971 | if (do_nonfinite |
10972 | || (real_isfinite (re0) && real_isfinite (im0) | |
10973 | && real_isfinite (re1) && real_isfinite (im1))) | |
c699fab8 | 10974 | { |
10975 | const struct real_format *const fmt = | |
10976 | REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (type))); | |
10977 | const int prec = fmt->p; | |
10978 | const mp_rnd_t rnd = fmt->round_towards_zero ? GMP_RNDZ : GMP_RNDN; | |
10979 | const mpc_rnd_t crnd = fmt->round_towards_zero ? MPC_RNDZZ : MPC_RNDNN; | |
10980 | int inexact; | |
10981 | mpc_t m0, m1; | |
48e1416a | 10982 | |
c699fab8 | 10983 | mpc_init2 (m0, prec); |
10984 | mpc_init2 (m1, prec); | |
9af5ce0c | 10985 | mpfr_from_real (mpc_realref (m0), re0, rnd); |
10986 | mpfr_from_real (mpc_imagref (m0), im0, rnd); | |
10987 | mpfr_from_real (mpc_realref (m1), re1, rnd); | |
10988 | mpfr_from_real (mpc_imagref (m1), im1, rnd); | |
c699fab8 | 10989 | mpfr_clear_flags (); |
10990 | inexact = func (m0, m0, m1, crnd); | |
652d9409 | 10991 | result = do_mpc_ckconv (m0, type, inexact, do_nonfinite); |
c699fab8 | 10992 | mpc_clear (m0); |
10993 | mpc_clear (m1); | |
10994 | } | |
10995 | } | |
10996 | ||
10997 | return result; | |
10998 | } | |
239d491a | 10999 | |
75a70cf9 | 11000 | /* A wrapper function for builtin folding that prevents warnings for |
11001 | "statement without effect" and the like, caused by removing the | |
11002 | call node earlier than the warning is generated. */ | |
11003 | ||
11004 | tree | |
1a91d914 | 11005 | fold_call_stmt (gcall *stmt, bool ignore) |
75a70cf9 | 11006 | { |
11007 | tree ret = NULL_TREE; | |
11008 | tree fndecl = gimple_call_fndecl (stmt); | |
389dd41b | 11009 | location_t loc = gimple_location (stmt); |
a0e9bfbb | 11010 | if (fndecl && fndecl_built_in_p (fndecl) |
75a70cf9 | 11011 | && !gimple_call_va_arg_pack_p (stmt)) |
11012 | { | |
11013 | int nargs = gimple_call_num_args (stmt); | |
9845fb99 | 11014 | tree *args = (nargs > 0 |
11015 | ? gimple_call_arg_ptr (stmt, 0) | |
11016 | : &error_mark_node); | |
75a70cf9 | 11017 | |
198622c0 | 11018 | if (avoid_folding_inline_builtin (fndecl)) |
11019 | return NULL_TREE; | |
75a70cf9 | 11020 | if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD) |
11021 | { | |
9845fb99 | 11022 | return targetm.fold_builtin (fndecl, nargs, args, ignore); |
75a70cf9 | 11023 | } |
11024 | else | |
11025 | { | |
9d884767 | 11026 | ret = fold_builtin_n (loc, fndecl, args, nargs, ignore); |
75a70cf9 | 11027 | if (ret) |
11028 | { | |
11029 | /* Propagate location information from original call to | |
11030 | expansion of builtin. Otherwise things like | |
11031 | maybe_emit_chk_warning, that operate on the expansion | |
11032 | of a builtin, will use the wrong location information. */ | |
11033 | if (gimple_has_location (stmt)) | |
11034 | { | |
11035 | tree realret = ret; | |
11036 | if (TREE_CODE (ret) == NOP_EXPR) | |
11037 | realret = TREE_OPERAND (ret, 0); | |
11038 | if (CAN_HAVE_LOCATION_P (realret) | |
11039 | && !EXPR_HAS_LOCATION (realret)) | |
389dd41b | 11040 | SET_EXPR_LOCATION (realret, loc); |
75a70cf9 | 11041 | return realret; |
11042 | } | |
11043 | return ret; | |
11044 | } | |
11045 | } | |
11046 | } | |
11047 | return NULL_TREE; | |
11048 | } | |
7bfefa9d | 11049 | |
b9a16870 | 11050 | /* Look up the function in builtin_decl that corresponds to DECL |
7bfefa9d | 11051 | and set ASMSPEC as its user assembler name. DECL must be a |
11052 | function decl that declares a builtin. */ | |
11053 | ||
11054 | void | |
11055 | set_builtin_user_assembler_name (tree decl, const char *asmspec) | |
11056 | { | |
a0e9bfbb | 11057 | gcc_assert (fndecl_built_in_p (decl, BUILT_IN_NORMAL) |
7bfefa9d | 11058 | && asmspec != 0); |
11059 | ||
61ffc71a | 11060 | tree builtin = builtin_decl_explicit (DECL_FUNCTION_CODE (decl)); |
4d8e0d6d | 11061 | set_user_assembler_name (builtin, asmspec); |
61ffc71a | 11062 | |
11063 | if (DECL_FUNCTION_CODE (decl) == BUILT_IN_FFS | |
11064 | && INT_TYPE_SIZE < BITS_PER_WORD) | |
7bfefa9d | 11065 | { |
44504d18 | 11066 | scalar_int_mode mode = int_mode_for_size (INT_TYPE_SIZE, 0).require (); |
61ffc71a | 11067 | set_user_assembler_libfunc ("ffs", asmspec); |
44504d18 | 11068 | set_optab_libfunc (ffs_optab, mode, "ffs"); |
7bfefa9d | 11069 | } |
11070 | } | |
a6b74a67 | 11071 | |
11072 | /* Return true if DECL is a builtin that expands to a constant or similarly | |
11073 | simple code. */ | |
11074 | bool | |
11075 | is_simple_builtin (tree decl) | |
11076 | { | |
a0e9bfbb | 11077 | if (decl && fndecl_built_in_p (decl, BUILT_IN_NORMAL)) |
a6b74a67 | 11078 | switch (DECL_FUNCTION_CODE (decl)) |
11079 | { | |
11080 | /* Builtins that expand to constants. */ | |
11081 | case BUILT_IN_CONSTANT_P: | |
11082 | case BUILT_IN_EXPECT: | |
11083 | case BUILT_IN_OBJECT_SIZE: | |
11084 | case BUILT_IN_UNREACHABLE: | |
11085 | /* Simple register moves or loads from stack. */ | |
fca0886c | 11086 | case BUILT_IN_ASSUME_ALIGNED: |
a6b74a67 | 11087 | case BUILT_IN_RETURN_ADDRESS: |
11088 | case BUILT_IN_EXTRACT_RETURN_ADDR: | |
11089 | case BUILT_IN_FROB_RETURN_ADDR: | |
11090 | case BUILT_IN_RETURN: | |
11091 | case BUILT_IN_AGGREGATE_INCOMING_ADDRESS: | |
11092 | case BUILT_IN_FRAME_ADDRESS: | |
11093 | case BUILT_IN_VA_END: | |
11094 | case BUILT_IN_STACK_SAVE: | |
11095 | case BUILT_IN_STACK_RESTORE: | |
11096 | /* Exception state returns or moves registers around. */ | |
11097 | case BUILT_IN_EH_FILTER: | |
11098 | case BUILT_IN_EH_POINTER: | |
11099 | case BUILT_IN_EH_COPY_VALUES: | |
11100 | return true; | |
11101 | ||
11102 | default: | |
11103 | return false; | |
11104 | } | |
11105 | ||
11106 | return false; | |
11107 | } | |
11108 | ||
11109 | /* Return true if DECL is a builtin that is not expensive, i.e., they are | |
11110 | most probably expanded inline into reasonably simple code. This is a | |
11111 | superset of is_simple_builtin. */ | |
11112 | bool | |
11113 | is_inexpensive_builtin (tree decl) | |
11114 | { | |
11115 | if (!decl) | |
11116 | return false; | |
11117 | else if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_MD) | |
11118 | return true; | |
11119 | else if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL) | |
11120 | switch (DECL_FUNCTION_CODE (decl)) | |
11121 | { | |
11122 | case BUILT_IN_ABS: | |
2b34677f | 11123 | CASE_BUILT_IN_ALLOCA: |
74bdbe96 | 11124 | case BUILT_IN_BSWAP16: |
a6b74a67 | 11125 | case BUILT_IN_BSWAP32: |
11126 | case BUILT_IN_BSWAP64: | |
11127 | case BUILT_IN_CLZ: | |
11128 | case BUILT_IN_CLZIMAX: | |
11129 | case BUILT_IN_CLZL: | |
11130 | case BUILT_IN_CLZLL: | |
11131 | case BUILT_IN_CTZ: | |
11132 | case BUILT_IN_CTZIMAX: | |
11133 | case BUILT_IN_CTZL: | |
11134 | case BUILT_IN_CTZLL: | |
11135 | case BUILT_IN_FFS: | |
11136 | case BUILT_IN_FFSIMAX: | |
11137 | case BUILT_IN_FFSL: | |
11138 | case BUILT_IN_FFSLL: | |
11139 | case BUILT_IN_IMAXABS: | |
11140 | case BUILT_IN_FINITE: | |
11141 | case BUILT_IN_FINITEF: | |
11142 | case BUILT_IN_FINITEL: | |
11143 | case BUILT_IN_FINITED32: | |
11144 | case BUILT_IN_FINITED64: | |
11145 | case BUILT_IN_FINITED128: | |
11146 | case BUILT_IN_FPCLASSIFY: | |
11147 | case BUILT_IN_ISFINITE: | |
11148 | case BUILT_IN_ISINF_SIGN: | |
11149 | case BUILT_IN_ISINF: | |
11150 | case BUILT_IN_ISINFF: | |
11151 | case BUILT_IN_ISINFL: | |
11152 | case BUILT_IN_ISINFD32: | |
11153 | case BUILT_IN_ISINFD64: | |
11154 | case BUILT_IN_ISINFD128: | |
11155 | case BUILT_IN_ISNAN: | |
11156 | case BUILT_IN_ISNANF: | |
11157 | case BUILT_IN_ISNANL: | |
11158 | case BUILT_IN_ISNAND32: | |
11159 | case BUILT_IN_ISNAND64: | |
11160 | case BUILT_IN_ISNAND128: | |
11161 | case BUILT_IN_ISNORMAL: | |
11162 | case BUILT_IN_ISGREATER: | |
11163 | case BUILT_IN_ISGREATEREQUAL: | |
11164 | case BUILT_IN_ISLESS: | |
11165 | case BUILT_IN_ISLESSEQUAL: | |
11166 | case BUILT_IN_ISLESSGREATER: | |
11167 | case BUILT_IN_ISUNORDERED: | |
11168 | case BUILT_IN_VA_ARG_PACK: | |
11169 | case BUILT_IN_VA_ARG_PACK_LEN: | |
11170 | case BUILT_IN_VA_COPY: | |
11171 | case BUILT_IN_TRAP: | |
11172 | case BUILT_IN_SAVEREGS: | |
11173 | case BUILT_IN_POPCOUNTL: | |
11174 | case BUILT_IN_POPCOUNTLL: | |
11175 | case BUILT_IN_POPCOUNTIMAX: | |
11176 | case BUILT_IN_POPCOUNT: | |
11177 | case BUILT_IN_PARITYL: | |
11178 | case BUILT_IN_PARITYLL: | |
11179 | case BUILT_IN_PARITYIMAX: | |
11180 | case BUILT_IN_PARITY: | |
11181 | case BUILT_IN_LABS: | |
11182 | case BUILT_IN_LLABS: | |
11183 | case BUILT_IN_PREFETCH: | |
ca4c3545 | 11184 | case BUILT_IN_ACC_ON_DEVICE: |
a6b74a67 | 11185 | return true; |
11186 | ||
11187 | default: | |
11188 | return is_simple_builtin (decl); | |
11189 | } | |
11190 | ||
11191 | return false; | |
11192 | } | |
507a998e | 11193 | |
11194 | /* Return true if T is a constant and the value cast to a target char | |
11195 | can be represented by a host char. | |
11196 | Store the casted char constant in *P if so. */ | |
11197 | ||
11198 | bool | |
11199 | target_char_cst_p (tree t, char *p) | |
11200 | { | |
11201 | if (!tree_fits_uhwi_p (t) || CHAR_TYPE_SIZE != HOST_BITS_PER_CHAR) | |
11202 | return false; | |
11203 | ||
11204 | *p = (char)tree_to_uhwi (t); | |
11205 | return true; | |
11206 | } | |
e6a18b5a | 11207 | |
11208 | /* Return the maximum object size. */ | |
11209 | ||
11210 | tree | |
11211 | max_object_size (void) | |
11212 | { | |
11213 | /* To do: Make this a configurable parameter. */ | |
11214 | return TYPE_MAX_VALUE (ptrdiff_type_node); | |
11215 | } |