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53800dbe | 1 | /* Expand builtin functions. |
aad93da1 | 2 | Copyright (C) 1988-2017 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" |
34 | #include "tm_p.h" | |
35 | #include "stringpool.h" | |
c296f633 | 36 | #include "tree-vrp.h" |
7c29e30e | 37 | #include "tree-ssanames.h" |
38 | #include "expmed.h" | |
39 | #include "optabs.h" | |
7c29e30e | 40 | #include "emit-rtl.h" |
41 | #include "recog.h" | |
7c29e30e | 42 | #include "diagnostic-core.h" |
b20a8bb4 | 43 | #include "alias.h" |
b20a8bb4 | 44 | #include "fold-const.h" |
6c21be92 | 45 | #include "fold-const-call.h" |
9ed99284 | 46 | #include "stor-layout.h" |
47 | #include "calls.h" | |
48 | #include "varasm.h" | |
49 | #include "tree-object-size.h" | |
dae0b5cb | 50 | #include "realmpfr.h" |
94ea8568 | 51 | #include "cfgrtl.h" |
53800dbe | 52 | #include "except.h" |
d53441c8 | 53 | #include "dojump.h" |
54 | #include "explow.h" | |
d53441c8 | 55 | #include "stmt.h" |
53800dbe | 56 | #include "expr.h" |
d8fc4d0b | 57 | #include "libfuncs.h" |
53800dbe | 58 | #include "output.h" |
59 | #include "typeclass.h" | |
63c62881 | 60 | #include "langhooks.h" |
162719b3 | 61 | #include "value-prof.h" |
3b9c3a16 | 62 | #include "builtins.h" |
30a86690 | 63 | #include "stringpool.h" |
64 | #include "attribs.h" | |
f9acf11a | 65 | #include "asan.h" |
d037099f | 66 | #include "cilk.h" |
058a1b7a | 67 | #include "tree-chkp.h" |
68 | #include "rtl-chkp.h" | |
1f24b8e9 | 69 | #include "internal-fn.h" |
e3240774 | 70 | #include "case-cfn-macros.h" |
732905bb | 71 | #include "gimple-fold.h" |
5aef8938 | 72 | #include "intl.h" |
5383fb56 | 73 | |
3b9c3a16 | 74 | struct target_builtins default_target_builtins; |
75 | #if SWITCHABLE_TARGET | |
76 | struct target_builtins *this_target_builtins = &default_target_builtins; | |
77 | #endif | |
78 | ||
ab7943b9 | 79 | /* Define the names of the builtin function types and codes. */ |
96423453 | 80 | const char *const built_in_class_names[BUILT_IN_LAST] |
ab7943b9 | 81 | = {"NOT_BUILT_IN", "BUILT_IN_FRONTEND", "BUILT_IN_MD", "BUILT_IN_NORMAL"}; |
82 | ||
9cfddb70 | 83 | #define DEF_BUILTIN(X, N, C, T, LT, B, F, NA, AT, IM, COND) #X, |
0dfc45b5 | 84 | const char * built_in_names[(int) END_BUILTINS] = |
4e9d90c7 | 85 | { |
86 | #include "builtins.def" | |
87 | }; | |
ab7943b9 | 88 | |
cffdfb3d | 89 | /* Setup an array of builtin_info_type, make sure each element decl is |
df94cd3b | 90 | initialized to NULL_TREE. */ |
cffdfb3d | 91 | builtin_info_type builtin_info[(int)END_BUILTINS]; |
df94cd3b | 92 | |
0b049e15 | 93 | /* Non-zero if __builtin_constant_p should be folded right away. */ |
94 | bool force_folding_builtin_constant_p; | |
95 | ||
3754d046 | 96 | static rtx c_readstr (const char *, machine_mode); |
aecda0d6 | 97 | static int target_char_cast (tree, char *); |
d8ae1baa | 98 | static rtx get_memory_rtx (tree, tree); |
aecda0d6 | 99 | static int apply_args_size (void); |
100 | static int apply_result_size (void); | |
aecda0d6 | 101 | static rtx result_vector (int, rtx); |
aecda0d6 | 102 | static void expand_builtin_prefetch (tree); |
103 | static rtx expand_builtin_apply_args (void); | |
104 | static rtx expand_builtin_apply_args_1 (void); | |
105 | static rtx expand_builtin_apply (rtx, rtx, rtx); | |
106 | static void expand_builtin_return (rtx); | |
107 | static enum type_class type_to_class (tree); | |
108 | static rtx expand_builtin_classify_type (tree); | |
6b43bae4 | 109 | static rtx expand_builtin_mathfn_3 (tree, rtx, rtx); |
7e0713b1 | 110 | static rtx expand_builtin_mathfn_ternary (tree, rtx, rtx); |
f97eea22 | 111 | static rtx expand_builtin_interclass_mathfn (tree, rtx); |
c3147c1a | 112 | static rtx expand_builtin_sincos (tree); |
f97eea22 | 113 | static rtx expand_builtin_cexpi (tree, rtx); |
ff1b14e4 | 114 | static rtx expand_builtin_int_roundingfn (tree, rtx); |
115 | static rtx expand_builtin_int_roundingfn_2 (tree, rtx); | |
79012a9d | 116 | static rtx expand_builtin_next_arg (void); |
aecda0d6 | 117 | static rtx expand_builtin_va_start (tree); |
118 | static rtx expand_builtin_va_end (tree); | |
119 | static rtx expand_builtin_va_copy (tree); | |
a65c4d64 | 120 | static rtx expand_builtin_strcmp (tree, rtx); |
3754d046 | 121 | static rtx expand_builtin_strncmp (tree, rtx, machine_mode); |
122 | static rtx builtin_memcpy_read_str (void *, HOST_WIDE_INT, machine_mode); | |
8d6c6ef5 | 123 | static rtx expand_builtin_memchr (tree, rtx); |
a65c4d64 | 124 | static rtx expand_builtin_memcpy (tree, rtx); |
f21337ef | 125 | static rtx expand_builtin_memcpy_with_bounds (tree, rtx); |
d0fbba1a | 126 | static rtx expand_builtin_memory_copy_args (tree dest, tree src, tree len, |
127 | rtx target, tree exp, int endp); | |
4d317237 | 128 | static rtx expand_builtin_memmove (tree, rtx); |
d0fbba1a | 129 | static rtx expand_builtin_mempcpy (tree, rtx); |
130 | static rtx expand_builtin_mempcpy_with_bounds (tree, rtx); | |
131 | static rtx expand_builtin_mempcpy_args (tree, tree, tree, rtx, tree, int); | |
5aef8938 | 132 | static rtx expand_builtin_strcat (tree, rtx); |
a65c4d64 | 133 | static rtx expand_builtin_strcpy (tree, rtx); |
134 | static rtx expand_builtin_strcpy_args (tree, tree, rtx); | |
3754d046 | 135 | static rtx expand_builtin_stpcpy (tree, rtx, machine_mode); |
4d317237 | 136 | static rtx expand_builtin_stpncpy (tree, rtx); |
5aef8938 | 137 | static rtx expand_builtin_strncat (tree, rtx); |
a65c4d64 | 138 | static rtx expand_builtin_strncpy (tree, rtx); |
3754d046 | 139 | static rtx builtin_memset_gen_str (void *, HOST_WIDE_INT, machine_mode); |
140 | static rtx expand_builtin_memset (tree, rtx, machine_mode); | |
f21337ef | 141 | static rtx expand_builtin_memset_with_bounds (tree, rtx, machine_mode); |
3754d046 | 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); |
2b29cc6a | 145 | static rtx expand_builtin_alloca (tree); |
3754d046 | 146 | static rtx expand_builtin_unop (machine_mode, tree, rtx, rtx, optab); |
aecda0d6 | 147 | static rtx expand_builtin_frame_address (tree, tree); |
389dd41b | 148 | static tree stabilize_va_list_loc (location_t, tree, int); |
aecda0d6 | 149 | static rtx expand_builtin_expect (tree, rtx); |
150 | static tree fold_builtin_constant_p (tree); | |
151 | static tree fold_builtin_classify_type (tree); | |
c7cbde74 | 152 | static tree fold_builtin_strlen (location_t, tree, tree); |
389dd41b | 153 | static tree fold_builtin_inf (location_t, tree, int); |
389dd41b | 154 | static tree rewrite_call_expr (location_t, tree, int, tree, int, ...); |
184fac50 | 155 | static bool validate_arg (const_tree, enum tree_code code); |
aecda0d6 | 156 | static rtx expand_builtin_fabs (tree, rtx, rtx); |
27f261ef | 157 | static rtx expand_builtin_signbit (tree, rtx); |
389dd41b | 158 | static tree fold_builtin_memcmp (location_t, tree, tree, tree); |
389dd41b | 159 | static tree fold_builtin_isascii (location_t, tree); |
160 | static tree fold_builtin_toascii (location_t, tree); | |
161 | static tree fold_builtin_isdigit (location_t, tree); | |
162 | static tree fold_builtin_fabs (location_t, tree, tree); | |
163 | static tree fold_builtin_abs (location_t, tree, tree); | |
164 | static tree fold_builtin_unordered_cmp (location_t, tree, tree, tree, enum tree_code, | |
d5019fe8 | 165 | enum tree_code); |
e80cc485 | 166 | static tree fold_builtin_0 (location_t, tree); |
167 | static tree fold_builtin_1 (location_t, tree, tree); | |
168 | static tree fold_builtin_2 (location_t, tree, tree, tree); | |
169 | static tree fold_builtin_3 (location_t, tree, tree, tree, tree); | |
12f08300 | 170 | static tree fold_builtin_varargs (location_t, tree, tree*, int); |
389dd41b | 171 | |
172 | static tree fold_builtin_strpbrk (location_t, tree, tree, tree); | |
389dd41b | 173 | static tree fold_builtin_strspn (location_t, tree, tree); |
174 | static tree fold_builtin_strcspn (location_t, tree, tree); | |
4ee9c684 | 175 | |
0a39fd54 | 176 | static rtx expand_builtin_object_size (tree); |
3754d046 | 177 | static rtx expand_builtin_memory_chk (tree, rtx, machine_mode, |
0a39fd54 | 178 | enum built_in_function); |
179 | static void maybe_emit_chk_warning (tree, enum built_in_function); | |
180 | static void maybe_emit_sprintf_chk_warning (tree, enum built_in_function); | |
2c281b15 | 181 | static void maybe_emit_free_warning (tree); |
c2f47e15 | 182 | static tree fold_builtin_object_size (tree, tree); |
99eabcc1 | 183 | |
e788f202 | 184 | unsigned HOST_WIDE_INT target_newline; |
b9ea678c | 185 | unsigned HOST_WIDE_INT target_percent; |
99eabcc1 | 186 | static unsigned HOST_WIDE_INT target_c; |
187 | static unsigned HOST_WIDE_INT target_s; | |
aea88c77 | 188 | char target_percent_c[3]; |
b9ea678c | 189 | char target_percent_s[3]; |
e788f202 | 190 | char target_percent_s_newline[4]; |
e5407ca6 | 191 | static tree do_mpfr_remquo (tree, tree, tree); |
e84da7c1 | 192 | static tree do_mpfr_lgamma_r (tree, tree, tree); |
1cd6e20d | 193 | static void expand_builtin_sync_synchronize (void); |
0a39fd54 | 194 | |
7bfefa9d | 195 | /* Return true if NAME starts with __builtin_ or __sync_. */ |
196 | ||
b29139ad | 197 | static bool |
1c47b3e8 | 198 | is_builtin_name (const char *name) |
b6a5fc45 | 199 | { |
b6a5fc45 | 200 | if (strncmp (name, "__builtin_", 10) == 0) |
201 | return true; | |
202 | if (strncmp (name, "__sync_", 7) == 0) | |
203 | return true; | |
1cd6e20d | 204 | if (strncmp (name, "__atomic_", 9) == 0) |
205 | return true; | |
a89e6c15 | 206 | if (flag_cilkplus |
d037099f | 207 | && (!strcmp (name, "__cilkrts_detach") |
208 | || !strcmp (name, "__cilkrts_pop_frame"))) | |
209 | return true; | |
b6a5fc45 | 210 | return false; |
211 | } | |
4ee9c684 | 212 | |
7bfefa9d | 213 | |
214 | /* Return true if DECL is a function symbol representing a built-in. */ | |
215 | ||
216 | bool | |
217 | is_builtin_fn (tree decl) | |
218 | { | |
219 | return TREE_CODE (decl) == FUNCTION_DECL && DECL_BUILT_IN (decl); | |
220 | } | |
221 | ||
1c47b3e8 | 222 | /* Return true if NODE should be considered for inline expansion regardless |
223 | of the optimization level. This means whenever a function is invoked with | |
224 | its "internal" name, which normally contains the prefix "__builtin". */ | |
225 | ||
ae62deea | 226 | bool |
1c47b3e8 | 227 | called_as_built_in (tree node) |
228 | { | |
229 | /* Note that we must use DECL_NAME, not DECL_ASSEMBLER_NAME_SET_P since | |
230 | we want the name used to call the function, not the name it | |
231 | will have. */ | |
232 | const char *name = IDENTIFIER_POINTER (DECL_NAME (node)); | |
233 | return is_builtin_name (name); | |
234 | } | |
235 | ||
ceea063b | 236 | /* Compute values M and N such that M divides (address of EXP - N) and such |
237 | that N < M. If these numbers can be determined, store M in alignp and N in | |
238 | *BITPOSP and return true. Otherwise return false and store BITS_PER_UNIT to | |
239 | *alignp and any bit-offset to *bitposp. | |
0d8f7716 | 240 | |
241 | Note that the address (and thus the alignment) computed here is based | |
242 | on the address to which a symbol resolves, whereas DECL_ALIGN is based | |
243 | on the address at which an object is actually located. These two | |
244 | addresses are not always the same. For example, on ARM targets, | |
245 | the address &foo of a Thumb function foo() has the lowest bit set, | |
3482bf13 | 246 | whereas foo() itself starts on an even address. |
698537d1 | 247 | |
3482bf13 | 248 | If ADDR_P is true we are taking the address of the memory reference EXP |
249 | and thus cannot rely on the access taking place. */ | |
250 | ||
251 | static bool | |
252 | get_object_alignment_2 (tree exp, unsigned int *alignp, | |
253 | unsigned HOST_WIDE_INT *bitposp, bool addr_p) | |
698537d1 | 254 | { |
98ab9e8f | 255 | HOST_WIDE_INT bitsize, bitpos; |
256 | tree offset; | |
3754d046 | 257 | machine_mode mode; |
292237f3 | 258 | int unsignedp, reversep, volatilep; |
c8a2b4ff | 259 | unsigned int align = BITS_PER_UNIT; |
ceea063b | 260 | bool known_alignment = false; |
698537d1 | 261 | |
98ab9e8f | 262 | /* Get the innermost object and the constant (bitpos) and possibly |
263 | variable (offset) offset of the access. */ | |
292237f3 | 264 | exp = get_inner_reference (exp, &bitsize, &bitpos, &offset, &mode, |
b3b6e4b5 | 265 | &unsignedp, &reversep, &volatilep); |
98ab9e8f | 266 | |
267 | /* Extract alignment information from the innermost object and | |
268 | possibly adjust bitpos and offset. */ | |
3482bf13 | 269 | if (TREE_CODE (exp) == FUNCTION_DECL) |
0d8f7716 | 270 | { |
3482bf13 | 271 | /* Function addresses can encode extra information besides their |
272 | alignment. However, if TARGET_PTRMEMFUNC_VBIT_LOCATION | |
273 | allows the low bit to be used as a virtual bit, we know | |
274 | that the address itself must be at least 2-byte aligned. */ | |
275 | if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn) | |
276 | align = 2 * BITS_PER_UNIT; | |
0d8f7716 | 277 | } |
3482bf13 | 278 | else if (TREE_CODE (exp) == LABEL_DECL) |
279 | ; | |
280 | else if (TREE_CODE (exp) == CONST_DECL) | |
98ab9e8f | 281 | { |
3482bf13 | 282 | /* The alignment of a CONST_DECL is determined by its initializer. */ |
283 | exp = DECL_INITIAL (exp); | |
98ab9e8f | 284 | align = TYPE_ALIGN (TREE_TYPE (exp)); |
3482bf13 | 285 | if (CONSTANT_CLASS_P (exp)) |
286 | align = (unsigned) CONSTANT_ALIGNMENT (exp, align); | |
e532afed | 287 | |
3482bf13 | 288 | known_alignment = true; |
98ab9e8f | 289 | } |
3482bf13 | 290 | else if (DECL_P (exp)) |
ceea063b | 291 | { |
3482bf13 | 292 | align = DECL_ALIGN (exp); |
ceea063b | 293 | known_alignment = true; |
ceea063b | 294 | } |
3482bf13 | 295 | else if (TREE_CODE (exp) == INDIRECT_REF |
296 | || TREE_CODE (exp) == MEM_REF | |
297 | || TREE_CODE (exp) == TARGET_MEM_REF) | |
98ab9e8f | 298 | { |
299 | tree addr = TREE_OPERAND (exp, 0); | |
ceea063b | 300 | unsigned ptr_align; |
301 | unsigned HOST_WIDE_INT ptr_bitpos; | |
ab1e78e5 | 302 | unsigned HOST_WIDE_INT ptr_bitmask = ~0; |
ceea063b | 303 | |
ab1e78e5 | 304 | /* If the address is explicitely aligned, handle that. */ |
98ab9e8f | 305 | if (TREE_CODE (addr) == BIT_AND_EXPR |
306 | && TREE_CODE (TREE_OPERAND (addr, 1)) == INTEGER_CST) | |
307 | { | |
ab1e78e5 | 308 | ptr_bitmask = TREE_INT_CST_LOW (TREE_OPERAND (addr, 1)); |
309 | ptr_bitmask *= BITS_PER_UNIT; | |
ac29ece2 | 310 | align = least_bit_hwi (ptr_bitmask); |
98ab9e8f | 311 | addr = TREE_OPERAND (addr, 0); |
312 | } | |
ceea063b | 313 | |
3482bf13 | 314 | known_alignment |
315 | = get_pointer_alignment_1 (addr, &ptr_align, &ptr_bitpos); | |
3482bf13 | 316 | align = MAX (ptr_align, align); |
317 | ||
ab1e78e5 | 318 | /* Re-apply explicit alignment to the bitpos. */ |
319 | ptr_bitpos &= ptr_bitmask; | |
320 | ||
4083990a | 321 | /* The alignment of the pointer operand in a TARGET_MEM_REF |
322 | has to take the variable offset parts into account. */ | |
3482bf13 | 323 | if (TREE_CODE (exp) == TARGET_MEM_REF) |
153c3b50 | 324 | { |
3482bf13 | 325 | if (TMR_INDEX (exp)) |
326 | { | |
327 | unsigned HOST_WIDE_INT step = 1; | |
328 | if (TMR_STEP (exp)) | |
f9ae6f95 | 329 | step = TREE_INT_CST_LOW (TMR_STEP (exp)); |
ac29ece2 | 330 | align = MIN (align, least_bit_hwi (step) * BITS_PER_UNIT); |
3482bf13 | 331 | } |
332 | if (TMR_INDEX2 (exp)) | |
333 | align = BITS_PER_UNIT; | |
334 | known_alignment = false; | |
153c3b50 | 335 | } |
ceea063b | 336 | |
3482bf13 | 337 | /* When EXP is an actual memory reference then we can use |
338 | TYPE_ALIGN of a pointer indirection to derive alignment. | |
339 | Do so only if get_pointer_alignment_1 did not reveal absolute | |
4083990a | 340 | alignment knowledge and if using that alignment would |
341 | improve the situation. */ | |
700a9760 | 342 | unsigned int talign; |
4083990a | 343 | if (!addr_p && !known_alignment |
700a9760 | 344 | && (talign = min_align_of_type (TREE_TYPE (exp)) * BITS_PER_UNIT) |
345 | && talign > align) | |
346 | align = talign; | |
4083990a | 347 | else |
348 | { | |
349 | /* Else adjust bitpos accordingly. */ | |
350 | bitpos += ptr_bitpos; | |
351 | if (TREE_CODE (exp) == MEM_REF | |
352 | || TREE_CODE (exp) == TARGET_MEM_REF) | |
e913b5cd | 353 | bitpos += mem_ref_offset (exp).to_short_addr () * BITS_PER_UNIT; |
4083990a | 354 | } |
98ab9e8f | 355 | } |
3482bf13 | 356 | else if (TREE_CODE (exp) == STRING_CST) |
153c3b50 | 357 | { |
3482bf13 | 358 | /* STRING_CST are the only constant objects we allow to be not |
359 | wrapped inside a CONST_DECL. */ | |
360 | align = TYPE_ALIGN (TREE_TYPE (exp)); | |
3482bf13 | 361 | if (CONSTANT_CLASS_P (exp)) |
362 | align = (unsigned) CONSTANT_ALIGNMENT (exp, align); | |
e532afed | 363 | |
3482bf13 | 364 | known_alignment = true; |
98ab9e8f | 365 | } |
98ab9e8f | 366 | |
367 | /* If there is a non-constant offset part extract the maximum | |
368 | alignment that can prevail. */ | |
c8a2b4ff | 369 | if (offset) |
98ab9e8f | 370 | { |
ad464c56 | 371 | unsigned int trailing_zeros = tree_ctz (offset); |
c8a2b4ff | 372 | if (trailing_zeros < HOST_BITS_PER_INT) |
98ab9e8f | 373 | { |
c8a2b4ff | 374 | unsigned int inner = (1U << trailing_zeros) * BITS_PER_UNIT; |
375 | if (inner) | |
376 | align = MIN (align, inner); | |
98ab9e8f | 377 | } |
98ab9e8f | 378 | } |
379 | ||
3482bf13 | 380 | *alignp = align; |
381 | *bitposp = bitpos & (*alignp - 1); | |
ceea063b | 382 | return known_alignment; |
0c883ef3 | 383 | } |
384 | ||
3482bf13 | 385 | /* For a memory reference expression EXP compute values M and N such that M |
386 | divides (&EXP - N) and such that N < M. If these numbers can be determined, | |
387 | store M in alignp and N in *BITPOSP and return true. Otherwise return false | |
388 | and store BITS_PER_UNIT to *alignp and any bit-offset to *bitposp. */ | |
389 | ||
390 | bool | |
391 | get_object_alignment_1 (tree exp, unsigned int *alignp, | |
392 | unsigned HOST_WIDE_INT *bitposp) | |
393 | { | |
394 | return get_object_alignment_2 (exp, alignp, bitposp, false); | |
395 | } | |
396 | ||
957d0361 | 397 | /* Return the alignment in bits of EXP, an object. */ |
0c883ef3 | 398 | |
399 | unsigned int | |
957d0361 | 400 | get_object_alignment (tree exp) |
0c883ef3 | 401 | { |
402 | unsigned HOST_WIDE_INT bitpos = 0; | |
403 | unsigned int align; | |
404 | ||
ceea063b | 405 | get_object_alignment_1 (exp, &align, &bitpos); |
0c883ef3 | 406 | |
98ab9e8f | 407 | /* align and bitpos now specify known low bits of the pointer. |
408 | ptr & (align - 1) == bitpos. */ | |
409 | ||
410 | if (bitpos != 0) | |
ac29ece2 | 411 | align = least_bit_hwi (bitpos); |
957d0361 | 412 | return align; |
698537d1 | 413 | } |
414 | ||
ceea063b | 415 | /* For a pointer valued expression EXP compute values M and N such that M |
416 | divides (EXP - N) and such that N < M. If these numbers can be determined, | |
3482bf13 | 417 | store M in alignp and N in *BITPOSP and return true. Return false if |
418 | the results are just a conservative approximation. | |
53800dbe | 419 | |
ceea063b | 420 | If EXP is not a pointer, false is returned too. */ |
53800dbe | 421 | |
ceea063b | 422 | bool |
423 | get_pointer_alignment_1 (tree exp, unsigned int *alignp, | |
424 | unsigned HOST_WIDE_INT *bitposp) | |
53800dbe | 425 | { |
153c3b50 | 426 | STRIP_NOPS (exp); |
535e2026 | 427 | |
153c3b50 | 428 | if (TREE_CODE (exp) == ADDR_EXPR) |
3482bf13 | 429 | return get_object_alignment_2 (TREE_OPERAND (exp, 0), |
430 | alignp, bitposp, true); | |
906a9403 | 431 | else if (TREE_CODE (exp) == POINTER_PLUS_EXPR) |
432 | { | |
433 | unsigned int align; | |
434 | unsigned HOST_WIDE_INT bitpos; | |
435 | bool res = get_pointer_alignment_1 (TREE_OPERAND (exp, 0), | |
436 | &align, &bitpos); | |
437 | if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST) | |
438 | bitpos += TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)) * BITS_PER_UNIT; | |
439 | else | |
440 | { | |
441 | unsigned int trailing_zeros = tree_ctz (TREE_OPERAND (exp, 1)); | |
442 | if (trailing_zeros < HOST_BITS_PER_INT) | |
443 | { | |
444 | unsigned int inner = (1U << trailing_zeros) * BITS_PER_UNIT; | |
445 | if (inner) | |
446 | align = MIN (align, inner); | |
447 | } | |
448 | } | |
449 | *alignp = align; | |
450 | *bitposp = bitpos & (align - 1); | |
451 | return res; | |
452 | } | |
153c3b50 | 453 | else if (TREE_CODE (exp) == SSA_NAME |
454 | && POINTER_TYPE_P (TREE_TYPE (exp))) | |
53800dbe | 455 | { |
ceea063b | 456 | unsigned int ptr_align, ptr_misalign; |
153c3b50 | 457 | struct ptr_info_def *pi = SSA_NAME_PTR_INFO (exp); |
ceea063b | 458 | |
459 | if (pi && get_ptr_info_alignment (pi, &ptr_align, &ptr_misalign)) | |
460 | { | |
461 | *bitposp = ptr_misalign * BITS_PER_UNIT; | |
462 | *alignp = ptr_align * BITS_PER_UNIT; | |
d10da77a | 463 | /* Make sure to return a sensible alignment when the multiplication |
464 | by BITS_PER_UNIT overflowed. */ | |
465 | if (*alignp == 0) | |
466 | *alignp = 1u << (HOST_BITS_PER_INT - 1); | |
3482bf13 | 467 | /* We cannot really tell whether this result is an approximation. */ |
b428654a | 468 | return false; |
ceea063b | 469 | } |
470 | else | |
69fbc3aa | 471 | { |
472 | *bitposp = 0; | |
ceea063b | 473 | *alignp = BITS_PER_UNIT; |
474 | return false; | |
69fbc3aa | 475 | } |
53800dbe | 476 | } |
0bb8b39a | 477 | else if (TREE_CODE (exp) == INTEGER_CST) |
478 | { | |
479 | *alignp = BIGGEST_ALIGNMENT; | |
f9ae6f95 | 480 | *bitposp = ((TREE_INT_CST_LOW (exp) * BITS_PER_UNIT) |
0bb8b39a | 481 | & (BIGGEST_ALIGNMENT - 1)); |
482 | return true; | |
483 | } | |
153c3b50 | 484 | |
69fbc3aa | 485 | *bitposp = 0; |
ceea063b | 486 | *alignp = BITS_PER_UNIT; |
487 | return false; | |
53800dbe | 488 | } |
489 | ||
69fbc3aa | 490 | /* Return the alignment in bits of EXP, a pointer valued expression. |
491 | The alignment returned is, by default, the alignment of the thing that | |
492 | EXP points to. If it is not a POINTER_TYPE, 0 is returned. | |
493 | ||
494 | Otherwise, look at the expression to see if we can do better, i.e., if the | |
495 | expression is actually pointing at an object whose alignment is tighter. */ | |
496 | ||
497 | unsigned int | |
498 | get_pointer_alignment (tree exp) | |
499 | { | |
500 | unsigned HOST_WIDE_INT bitpos = 0; | |
501 | unsigned int align; | |
ceea063b | 502 | |
503 | get_pointer_alignment_1 (exp, &align, &bitpos); | |
69fbc3aa | 504 | |
505 | /* align and bitpos now specify known low bits of the pointer. | |
506 | ptr & (align - 1) == bitpos. */ | |
507 | ||
508 | if (bitpos != 0) | |
ac29ece2 | 509 | align = least_bit_hwi (bitpos); |
69fbc3aa | 510 | |
511 | return align; | |
512 | } | |
513 | ||
c62d63d4 | 514 | /* Return the number of non-zero elements in the sequence |
515 | [ PTR, PTR + MAXELTS ) where each element's size is ELTSIZE bytes. | |
516 | ELTSIZE must be a power of 2 less than 8. Used by c_strlen. */ | |
517 | ||
518 | static unsigned | |
519 | string_length (const void *ptr, unsigned eltsize, unsigned maxelts) | |
520 | { | |
521 | gcc_checking_assert (eltsize == 1 || eltsize == 2 || eltsize == 4); | |
522 | ||
523 | unsigned n; | |
524 | ||
525 | if (eltsize == 1) | |
526 | { | |
527 | /* Optimize the common case of plain char. */ | |
528 | for (n = 0; n < maxelts; n++) | |
529 | { | |
530 | const char *elt = (const char*) ptr + n; | |
531 | if (!*elt) | |
532 | break; | |
533 | } | |
534 | } | |
535 | else | |
536 | { | |
537 | for (n = 0; n < maxelts; n++) | |
538 | { | |
539 | const char *elt = (const char*) ptr + n * eltsize; | |
540 | if (!memcmp (elt, "\0\0\0\0", eltsize)) | |
541 | break; | |
542 | } | |
543 | } | |
544 | return n; | |
545 | } | |
546 | ||
547 | /* Compute the length of a null-terminated character string or wide | |
548 | character string handling character sizes of 1, 2, and 4 bytes. | |
549 | TREE_STRING_LENGTH is not the right way because it evaluates to | |
550 | the size of the character array in bytes (as opposed to characters) | |
551 | and because it can contain a zero byte in the middle. | |
53800dbe | 552 | |
4172d65e | 553 | ONLY_VALUE should be nonzero if the result is not going to be emitted |
c09841f6 | 554 | into the instruction stream and zero if it is going to be expanded. |
4172d65e | 555 | E.g. with i++ ? "foo" : "bar", if ONLY_VALUE is nonzero, constant 3 |
681fab1e | 556 | is returned, otherwise NULL, since |
557 | len = c_strlen (src, 1); if (len) expand_expr (len, ...); would not | |
558 | evaluate the side-effects. | |
559 | ||
6bda159e | 560 | If ONLY_VALUE is two then we do not emit warnings about out-of-bound |
561 | accesses. Note that this implies the result is not going to be emitted | |
562 | into the instruction stream. | |
563 | ||
902de8ed | 564 | The value returned is of type `ssizetype'. |
565 | ||
53800dbe | 566 | Unfortunately, string_constant can't access the values of const char |
567 | arrays with initializers, so neither can we do so here. */ | |
568 | ||
4ee9c684 | 569 | tree |
681fab1e | 570 | c_strlen (tree src, int only_value) |
53800dbe | 571 | { |
681fab1e | 572 | STRIP_NOPS (src); |
573 | if (TREE_CODE (src) == COND_EXPR | |
574 | && (only_value || !TREE_SIDE_EFFECTS (TREE_OPERAND (src, 0)))) | |
575 | { | |
576 | tree len1, len2; | |
577 | ||
578 | len1 = c_strlen (TREE_OPERAND (src, 1), only_value); | |
579 | len2 = c_strlen (TREE_OPERAND (src, 2), only_value); | |
0862b7e9 | 580 | if (tree_int_cst_equal (len1, len2)) |
681fab1e | 581 | return len1; |
582 | } | |
583 | ||
584 | if (TREE_CODE (src) == COMPOUND_EXPR | |
585 | && (only_value || !TREE_SIDE_EFFECTS (TREE_OPERAND (src, 0)))) | |
586 | return c_strlen (TREE_OPERAND (src, 1), only_value); | |
587 | ||
c62d63d4 | 588 | location_t loc = EXPR_LOC_OR_LOC (src, input_location); |
da136652 | 589 | |
c62d63d4 | 590 | /* Offset from the beginning of the string in bytes. */ |
591 | tree byteoff; | |
592 | src = string_constant (src, &byteoff); | |
53800dbe | 593 | if (src == 0) |
c2f47e15 | 594 | return NULL_TREE; |
902de8ed | 595 | |
c62d63d4 | 596 | /* Determine the size of the string element. */ |
597 | unsigned eltsize | |
598 | = tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (src)))); | |
599 | ||
600 | /* Set MAXELTS to sizeof (SRC) / sizeof (*SRC) - 1, the maximum possible | |
601 | length of SRC. */ | |
602 | unsigned maxelts = TREE_STRING_LENGTH (src) / eltsize - 1; | |
603 | ||
604 | /* PTR can point to the byte representation of any string type, including | |
605 | char* and wchar_t*. */ | |
606 | const char *ptr = TREE_STRING_POINTER (src); | |
902de8ed | 607 | |
c62d63d4 | 608 | if (byteoff && TREE_CODE (byteoff) != INTEGER_CST) |
53800dbe | 609 | { |
610 | /* If the string has an internal zero byte (e.g., "foo\0bar"), we can't | |
611 | compute the offset to the following null if we don't know where to | |
612 | start searching for it. */ | |
c62d63d4 | 613 | if (string_length (ptr, eltsize, maxelts) < maxelts) |
614 | { | |
615 | /* Return when an embedded null character is found. */ | |
c2f47e15 | 616 | return NULL_TREE; |
c62d63d4 | 617 | } |
902de8ed | 618 | |
53800dbe | 619 | /* We don't know the starting offset, but we do know that the string |
620 | has no internal zero bytes. We can assume that the offset falls | |
621 | within the bounds of the string; otherwise, the programmer deserves | |
622 | what he gets. Subtract the offset from the length of the string, | |
902de8ed | 623 | and return that. This would perhaps not be valid if we were dealing |
624 | with named arrays in addition to literal string constants. */ | |
625 | ||
c62d63d4 | 626 | return size_diffop_loc (loc, size_int (maxelts * eltsize), byteoff); |
53800dbe | 627 | } |
628 | ||
c62d63d4 | 629 | /* Offset from the beginning of the string in elements. */ |
630 | HOST_WIDE_INT eltoff; | |
631 | ||
53800dbe | 632 | /* We have a known offset into the string. Start searching there for |
27d0c333 | 633 | a null character if we can represent it as a single HOST_WIDE_INT. */ |
c62d63d4 | 634 | if (byteoff == 0) |
635 | eltoff = 0; | |
636 | else if (! tree_fits_shwi_p (byteoff)) | |
637 | eltoff = -1; | |
53800dbe | 638 | else |
c62d63d4 | 639 | eltoff = tree_to_shwi (byteoff) / eltsize; |
902de8ed | 640 | |
1f63a7d6 | 641 | /* If the offset is known to be out of bounds, warn, and call strlen at |
642 | runtime. */ | |
c62d63d4 | 643 | if (eltoff < 0 || eltoff > maxelts) |
53800dbe | 644 | { |
1f63a7d6 | 645 | /* Suppress multiple warnings for propagated constant strings. */ |
2f1c4f17 | 646 | if (only_value != 2 |
647 | && !TREE_NO_WARNING (src)) | |
1f63a7d6 | 648 | { |
c62d63d4 | 649 | warning_at (loc, 0, "offset %qwi outside bounds of constant string", |
650 | eltoff); | |
1f63a7d6 | 651 | TREE_NO_WARNING (src) = 1; |
652 | } | |
c2f47e15 | 653 | return NULL_TREE; |
53800dbe | 654 | } |
902de8ed | 655 | |
53800dbe | 656 | /* Use strlen to search for the first zero byte. Since any strings |
657 | constructed with build_string will have nulls appended, we win even | |
658 | if we get handed something like (char[4])"abcd". | |
659 | ||
c62d63d4 | 660 | Since ELTOFF is our starting index into the string, no further |
53800dbe | 661 | calculation is needed. */ |
c62d63d4 | 662 | unsigned len = string_length (ptr + eltoff * eltsize, eltsize, |
663 | maxelts - eltoff); | |
664 | ||
665 | return ssize_int (len); | |
53800dbe | 666 | } |
667 | ||
e913b5cd | 668 | /* Return a constant integer corresponding to target reading |
8c85fcb7 | 669 | GET_MODE_BITSIZE (MODE) bits from string constant STR. */ |
ecc318ff | 670 | |
6840589f | 671 | static rtx |
3754d046 | 672 | c_readstr (const char *str, machine_mode mode) |
6840589f | 673 | { |
6840589f | 674 | HOST_WIDE_INT ch; |
675 | unsigned int i, j; | |
e913b5cd | 676 | HOST_WIDE_INT tmp[MAX_BITSIZE_MODE_ANY_INT / HOST_BITS_PER_WIDE_INT]; |
0407eaee | 677 | |
678 | gcc_assert (GET_MODE_CLASS (mode) == MODE_INT); | |
e913b5cd | 679 | unsigned int len = (GET_MODE_PRECISION (mode) + HOST_BITS_PER_WIDE_INT - 1) |
680 | / HOST_BITS_PER_WIDE_INT; | |
681 | ||
a12aa4cc | 682 | gcc_assert (len <= MAX_BITSIZE_MODE_ANY_INT / HOST_BITS_PER_WIDE_INT); |
e913b5cd | 683 | for (i = 0; i < len; i++) |
684 | tmp[i] = 0; | |
6840589f | 685 | |
6840589f | 686 | ch = 1; |
687 | for (i = 0; i < GET_MODE_SIZE (mode); i++) | |
688 | { | |
689 | j = i; | |
690 | if (WORDS_BIG_ENDIAN) | |
691 | j = GET_MODE_SIZE (mode) - i - 1; | |
692 | if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN | |
ad8f8e52 | 693 | && GET_MODE_SIZE (mode) >= UNITS_PER_WORD) |
6840589f | 694 | j = j + UNITS_PER_WORD - 2 * (j % UNITS_PER_WORD) - 1; |
695 | j *= BITS_PER_UNIT; | |
7d3f6cc7 | 696 | |
6840589f | 697 | if (ch) |
698 | ch = (unsigned char) str[i]; | |
e913b5cd | 699 | tmp[j / HOST_BITS_PER_WIDE_INT] |= ch << (j % HOST_BITS_PER_WIDE_INT); |
6840589f | 700 | } |
ddb1be65 | 701 | |
ab2c1de8 | 702 | wide_int c = wide_int::from_array (tmp, len, GET_MODE_PRECISION (mode)); |
e913b5cd | 703 | return immed_wide_int_const (c, mode); |
6840589f | 704 | } |
705 | ||
ecc318ff | 706 | /* Cast a target constant CST to target CHAR and if that value fits into |
5206b159 | 707 | host char type, return zero and put that value into variable pointed to by |
ecc318ff | 708 | P. */ |
709 | ||
710 | static int | |
aecda0d6 | 711 | target_char_cast (tree cst, char *p) |
ecc318ff | 712 | { |
713 | unsigned HOST_WIDE_INT val, hostval; | |
714 | ||
c19686c5 | 715 | if (TREE_CODE (cst) != INTEGER_CST |
ecc318ff | 716 | || CHAR_TYPE_SIZE > HOST_BITS_PER_WIDE_INT) |
717 | return 1; | |
718 | ||
e913b5cd | 719 | /* Do not care if it fits or not right here. */ |
f9ae6f95 | 720 | val = TREE_INT_CST_LOW (cst); |
e913b5cd | 721 | |
ecc318ff | 722 | if (CHAR_TYPE_SIZE < HOST_BITS_PER_WIDE_INT) |
edc19fd0 | 723 | val &= (HOST_WIDE_INT_1U << CHAR_TYPE_SIZE) - 1; |
ecc318ff | 724 | |
725 | hostval = val; | |
726 | if (HOST_BITS_PER_CHAR < HOST_BITS_PER_WIDE_INT) | |
edc19fd0 | 727 | hostval &= (HOST_WIDE_INT_1U << HOST_BITS_PER_CHAR) - 1; |
ecc318ff | 728 | |
729 | if (val != hostval) | |
730 | return 1; | |
731 | ||
732 | *p = hostval; | |
733 | return 0; | |
734 | } | |
735 | ||
4ee9c684 | 736 | /* Similar to save_expr, but assumes that arbitrary code is not executed |
737 | in between the multiple evaluations. In particular, we assume that a | |
738 | non-addressable local variable will not be modified. */ | |
739 | ||
740 | static tree | |
741 | builtin_save_expr (tree exp) | |
742 | { | |
f6c35aa4 | 743 | if (TREE_CODE (exp) == SSA_NAME |
744 | || (TREE_ADDRESSABLE (exp) == 0 | |
745 | && (TREE_CODE (exp) == PARM_DECL | |
53e9c5c4 | 746 | || (VAR_P (exp) && !TREE_STATIC (exp))))) |
4ee9c684 | 747 | return exp; |
748 | ||
749 | return save_expr (exp); | |
750 | } | |
751 | ||
53800dbe | 752 | /* Given TEM, a pointer to a stack frame, follow the dynamic chain COUNT |
753 | times to get the address of either a higher stack frame, or a return | |
754 | address located within it (depending on FNDECL_CODE). */ | |
902de8ed | 755 | |
c626df3d | 756 | static rtx |
869d0ef0 | 757 | expand_builtin_return_addr (enum built_in_function fndecl_code, int count) |
53800dbe | 758 | { |
759 | int i; | |
869d0ef0 | 760 | rtx tem = INITIAL_FRAME_ADDRESS_RTX; |
3f840859 | 761 | if (tem == NULL_RTX) |
e3e15c50 | 762 | { |
3f840859 | 763 | /* For a zero count with __builtin_return_address, we don't care what |
764 | frame address we return, because target-specific definitions will | |
765 | override us. Therefore frame pointer elimination is OK, and using | |
766 | the soft frame pointer is OK. | |
767 | ||
768 | For a nonzero count, or a zero count with __builtin_frame_address, | |
769 | we require a stable offset from the current frame pointer to the | |
770 | previous one, so we must use the hard frame pointer, and | |
771 | we must disable frame pointer elimination. */ | |
772 | if (count == 0 && fndecl_code == BUILT_IN_RETURN_ADDRESS) | |
773 | tem = frame_pointer_rtx; | |
774 | else | |
775 | { | |
776 | tem = hard_frame_pointer_rtx; | |
e3e15c50 | 777 | |
3f840859 | 778 | /* Tell reload not to eliminate the frame pointer. */ |
779 | crtl->accesses_prior_frames = 1; | |
780 | } | |
e3e15c50 | 781 | } |
869d0ef0 | 782 | |
53800dbe | 783 | if (count > 0) |
784 | SETUP_FRAME_ADDRESSES (); | |
53800dbe | 785 | |
3a69c60c | 786 | /* On the SPARC, the return address is not in the frame, it is in a |
53800dbe | 787 | register. There is no way to access it off of the current frame |
788 | pointer, but it can be accessed off the previous frame pointer by | |
789 | reading the value from the register window save area. */ | |
a26d6c60 | 790 | if (RETURN_ADDR_IN_PREVIOUS_FRAME && fndecl_code == BUILT_IN_RETURN_ADDRESS) |
53800dbe | 791 | count--; |
53800dbe | 792 | |
793 | /* Scan back COUNT frames to the specified frame. */ | |
794 | for (i = 0; i < count; i++) | |
795 | { | |
796 | /* Assume the dynamic chain pointer is in the word that the | |
797 | frame address points to, unless otherwise specified. */ | |
53800dbe | 798 | tem = DYNAMIC_CHAIN_ADDRESS (tem); |
53800dbe | 799 | tem = memory_address (Pmode, tem); |
00060fc2 | 800 | tem = gen_frame_mem (Pmode, tem); |
83fc1478 | 801 | tem = copy_to_reg (tem); |
53800dbe | 802 | } |
803 | ||
3a69c60c | 804 | /* For __builtin_frame_address, return what we've got. But, on |
805 | the SPARC for example, we may have to add a bias. */ | |
53800dbe | 806 | if (fndecl_code == BUILT_IN_FRAME_ADDRESS) |
3a69c60c | 807 | return FRAME_ADDR_RTX (tem); |
53800dbe | 808 | |
3a69c60c | 809 | /* For __builtin_return_address, get the return address from that frame. */ |
53800dbe | 810 | #ifdef RETURN_ADDR_RTX |
811 | tem = RETURN_ADDR_RTX (count, tem); | |
812 | #else | |
813 | tem = memory_address (Pmode, | |
29c05e22 | 814 | plus_constant (Pmode, tem, GET_MODE_SIZE (Pmode))); |
00060fc2 | 815 | tem = gen_frame_mem (Pmode, tem); |
53800dbe | 816 | #endif |
817 | return tem; | |
818 | } | |
819 | ||
f7c44134 | 820 | /* Alias set used for setjmp buffer. */ |
32c2fdea | 821 | static alias_set_type setjmp_alias_set = -1; |
f7c44134 | 822 | |
6b7f6858 | 823 | /* Construct the leading half of a __builtin_setjmp call. Control will |
2c8a1497 | 824 | return to RECEIVER_LABEL. This is also called directly by the SJLJ |
825 | exception handling code. */ | |
53800dbe | 826 | |
6b7f6858 | 827 | void |
aecda0d6 | 828 | expand_builtin_setjmp_setup (rtx buf_addr, rtx receiver_label) |
53800dbe | 829 | { |
3754d046 | 830 | machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); |
53800dbe | 831 | rtx stack_save; |
f7c44134 | 832 | rtx mem; |
53800dbe | 833 | |
f7c44134 | 834 | if (setjmp_alias_set == -1) |
835 | setjmp_alias_set = new_alias_set (); | |
836 | ||
85d654dd | 837 | buf_addr = convert_memory_address (Pmode, buf_addr); |
53800dbe | 838 | |
37ae8504 | 839 | buf_addr = force_reg (Pmode, force_operand (buf_addr, NULL_RTX)); |
53800dbe | 840 | |
6b7f6858 | 841 | /* We store the frame pointer and the address of receiver_label in |
842 | the buffer and use the rest of it for the stack save area, which | |
843 | is machine-dependent. */ | |
53800dbe | 844 | |
f7c44134 | 845 | mem = gen_rtx_MEM (Pmode, buf_addr); |
ab6ab77e | 846 | set_mem_alias_set (mem, setjmp_alias_set); |
e3e026e8 | 847 | emit_move_insn (mem, targetm.builtin_setjmp_frame_value ()); |
f7c44134 | 848 | |
29c05e22 | 849 | mem = gen_rtx_MEM (Pmode, plus_constant (Pmode, buf_addr, |
850 | GET_MODE_SIZE (Pmode))), | |
ab6ab77e | 851 | set_mem_alias_set (mem, setjmp_alias_set); |
f7c44134 | 852 | |
853 | emit_move_insn (validize_mem (mem), | |
6b7f6858 | 854 | force_reg (Pmode, gen_rtx_LABEL_REF (Pmode, receiver_label))); |
53800dbe | 855 | |
856 | stack_save = gen_rtx_MEM (sa_mode, | |
29c05e22 | 857 | plus_constant (Pmode, buf_addr, |
53800dbe | 858 | 2 * GET_MODE_SIZE (Pmode))); |
ab6ab77e | 859 | set_mem_alias_set (stack_save, setjmp_alias_set); |
e9c97615 | 860 | emit_stack_save (SAVE_NONLOCAL, &stack_save); |
53800dbe | 861 | |
862 | /* If there is further processing to do, do it. */ | |
a3c81e61 | 863 | if (targetm.have_builtin_setjmp_setup ()) |
864 | emit_insn (targetm.gen_builtin_setjmp_setup (buf_addr)); | |
53800dbe | 865 | |
29f09705 | 866 | /* We have a nonlocal label. */ |
18d50ae6 | 867 | cfun->has_nonlocal_label = 1; |
6b7f6858 | 868 | } |
53800dbe | 869 | |
2c8a1497 | 870 | /* Construct the trailing part of a __builtin_setjmp call. This is |
4598ade9 | 871 | also called directly by the SJLJ exception handling code. |
872 | If RECEIVER_LABEL is NULL, instead contruct a nonlocal goto handler. */ | |
6b7f6858 | 873 | |
874 | void | |
a3c81e61 | 875 | expand_builtin_setjmp_receiver (rtx receiver_label) |
6b7f6858 | 876 | { |
82c7907c | 877 | rtx chain; |
878 | ||
4598ade9 | 879 | /* Mark the FP as used when we get here, so we have to make sure it's |
53800dbe | 880 | marked as used by this function. */ |
18b42941 | 881 | emit_use (hard_frame_pointer_rtx); |
53800dbe | 882 | |
883 | /* Mark the static chain as clobbered here so life information | |
884 | doesn't get messed up for it. */ | |
82c7907c | 885 | chain = targetm.calls.static_chain (current_function_decl, true); |
886 | if (chain && REG_P (chain)) | |
887 | emit_clobber (chain); | |
53800dbe | 888 | |
889 | /* Now put in the code to restore the frame pointer, and argument | |
491e04ef | 890 | pointer, if needed. */ |
a3c81e61 | 891 | if (! targetm.have_nonlocal_goto ()) |
62dcb5c8 | 892 | { |
893 | /* First adjust our frame pointer to its actual value. It was | |
894 | previously set to the start of the virtual area corresponding to | |
895 | the stacked variables when we branched here and now needs to be | |
896 | adjusted to the actual hardware fp value. | |
897 | ||
898 | Assignments to virtual registers are converted by | |
899 | instantiate_virtual_regs into the corresponding assignment | |
900 | to the underlying register (fp in this case) that makes | |
901 | the original assignment true. | |
902 | So the following insn will actually be decrementing fp by | |
903 | STARTING_FRAME_OFFSET. */ | |
904 | emit_move_insn (virtual_stack_vars_rtx, hard_frame_pointer_rtx); | |
905 | ||
906 | /* Restoring the frame pointer also modifies the hard frame pointer. | |
907 | Mark it used (so that the previous assignment remains live once | |
908 | the frame pointer is eliminated) and clobbered (to represent the | |
909 | implicit update from the assignment). */ | |
910 | emit_use (hard_frame_pointer_rtx); | |
911 | emit_clobber (hard_frame_pointer_rtx); | |
912 | } | |
53800dbe | 913 | |
a494b6d7 | 914 | if (!HARD_FRAME_POINTER_IS_ARG_POINTER && fixed_regs[ARG_POINTER_REGNUM]) |
53800dbe | 915 | { |
4598ade9 | 916 | /* If the argument pointer can be eliminated in favor of the |
917 | frame pointer, we don't need to restore it. We assume here | |
918 | that if such an elimination is present, it can always be used. | |
919 | This is the case on all known machines; if we don't make this | |
920 | assumption, we do unnecessary saving on many machines. */ | |
53800dbe | 921 | size_t i; |
e99c3a1d | 922 | static const struct elims {const int from, to;} elim_regs[] = ELIMINABLE_REGS; |
53800dbe | 923 | |
3098b2d3 | 924 | for (i = 0; i < ARRAY_SIZE (elim_regs); i++) |
53800dbe | 925 | if (elim_regs[i].from == ARG_POINTER_REGNUM |
926 | && elim_regs[i].to == HARD_FRAME_POINTER_REGNUM) | |
927 | break; | |
928 | ||
3098b2d3 | 929 | if (i == ARRAY_SIZE (elim_regs)) |
53800dbe | 930 | { |
931 | /* Now restore our arg pointer from the address at which it | |
05927e40 | 932 | was saved in our stack frame. */ |
27a7a23a | 933 | emit_move_insn (crtl->args.internal_arg_pointer, |
b079a207 | 934 | copy_to_reg (get_arg_pointer_save_area ())); |
53800dbe | 935 | } |
936 | } | |
53800dbe | 937 | |
a3c81e61 | 938 | if (receiver_label != NULL && targetm.have_builtin_setjmp_receiver ()) |
939 | emit_insn (targetm.gen_builtin_setjmp_receiver (receiver_label)); | |
940 | else if (targetm.have_nonlocal_goto_receiver ()) | |
941 | emit_insn (targetm.gen_nonlocal_goto_receiver ()); | |
53800dbe | 942 | else |
a3c81e61 | 943 | { /* Nothing */ } |
57f6bb94 | 944 | |
3072d30e | 945 | /* We must not allow the code we just generated to be reordered by |
946 | scheduling. Specifically, the update of the frame pointer must | |
62dcb5c8 | 947 | happen immediately, not later. */ |
3072d30e | 948 | emit_insn (gen_blockage ()); |
6b7f6858 | 949 | } |
53800dbe | 950 | |
53800dbe | 951 | /* __builtin_longjmp is passed a pointer to an array of five words (not |
952 | all will be used on all machines). It operates similarly to the C | |
953 | library function of the same name, but is more efficient. Much of | |
2c8a1497 | 954 | the code below is copied from the handling of non-local gotos. */ |
53800dbe | 955 | |
c626df3d | 956 | static void |
aecda0d6 | 957 | expand_builtin_longjmp (rtx buf_addr, rtx value) |
53800dbe | 958 | { |
1e0c0b35 | 959 | rtx fp, lab, stack; |
960 | rtx_insn *insn, *last; | |
3754d046 | 961 | machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); |
53800dbe | 962 | |
48e1416a | 963 | /* DRAP is needed for stack realign if longjmp is expanded to current |
27a7a23a | 964 | function */ |
965 | if (SUPPORTS_STACK_ALIGNMENT) | |
966 | crtl->need_drap = true; | |
967 | ||
f7c44134 | 968 | if (setjmp_alias_set == -1) |
969 | setjmp_alias_set = new_alias_set (); | |
970 | ||
85d654dd | 971 | buf_addr = convert_memory_address (Pmode, buf_addr); |
479e4d5e | 972 | |
53800dbe | 973 | buf_addr = force_reg (Pmode, buf_addr); |
974 | ||
82c7907c | 975 | /* We require that the user must pass a second argument of 1, because |
976 | that is what builtin_setjmp will return. */ | |
64db345d | 977 | gcc_assert (value == const1_rtx); |
53800dbe | 978 | |
4712c7d6 | 979 | last = get_last_insn (); |
a3c81e61 | 980 | if (targetm.have_builtin_longjmp ()) |
981 | emit_insn (targetm.gen_builtin_longjmp (buf_addr)); | |
53800dbe | 982 | else |
53800dbe | 983 | { |
984 | fp = gen_rtx_MEM (Pmode, buf_addr); | |
29c05e22 | 985 | lab = gen_rtx_MEM (Pmode, plus_constant (Pmode, buf_addr, |
53800dbe | 986 | GET_MODE_SIZE (Pmode))); |
987 | ||
29c05e22 | 988 | stack = gen_rtx_MEM (sa_mode, plus_constant (Pmode, buf_addr, |
53800dbe | 989 | 2 * GET_MODE_SIZE (Pmode))); |
ab6ab77e | 990 | set_mem_alias_set (fp, setjmp_alias_set); |
991 | set_mem_alias_set (lab, setjmp_alias_set); | |
992 | set_mem_alias_set (stack, setjmp_alias_set); | |
53800dbe | 993 | |
994 | /* Pick up FP, label, and SP from the block and jump. This code is | |
995 | from expand_goto in stmt.c; see there for detailed comments. */ | |
a3c81e61 | 996 | if (targetm.have_nonlocal_goto ()) |
53800dbe | 997 | /* We have to pass a value to the nonlocal_goto pattern that will |
998 | get copied into the static_chain pointer, but it does not matter | |
999 | what that value is, because builtin_setjmp does not use it. */ | |
a3c81e61 | 1000 | emit_insn (targetm.gen_nonlocal_goto (value, lab, stack, fp)); |
53800dbe | 1001 | else |
53800dbe | 1002 | { |
1003 | lab = copy_to_reg (lab); | |
1004 | ||
18b42941 | 1005 | emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode))); |
1006 | emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx)); | |
2a871ad1 | 1007 | |
53800dbe | 1008 | emit_move_insn (hard_frame_pointer_rtx, fp); |
e9c97615 | 1009 | emit_stack_restore (SAVE_NONLOCAL, stack); |
53800dbe | 1010 | |
18b42941 | 1011 | emit_use (hard_frame_pointer_rtx); |
1012 | emit_use (stack_pointer_rtx); | |
53800dbe | 1013 | emit_indirect_jump (lab); |
1014 | } | |
1015 | } | |
615166bb | 1016 | |
1017 | /* Search backwards and mark the jump insn as a non-local goto. | |
1018 | Note that this precludes the use of __builtin_longjmp to a | |
1019 | __builtin_setjmp target in the same function. However, we've | |
1020 | already cautioned the user that these functions are for | |
1021 | internal exception handling use only. */ | |
449c0509 | 1022 | for (insn = get_last_insn (); insn; insn = PREV_INSN (insn)) |
1023 | { | |
64db345d | 1024 | gcc_assert (insn != last); |
7d3f6cc7 | 1025 | |
6d7dc5b9 | 1026 | if (JUMP_P (insn)) |
449c0509 | 1027 | { |
a1ddb869 | 1028 | add_reg_note (insn, REG_NON_LOCAL_GOTO, const0_rtx); |
449c0509 | 1029 | break; |
1030 | } | |
6d7dc5b9 | 1031 | else if (CALL_P (insn)) |
9342ee68 | 1032 | break; |
449c0509 | 1033 | } |
53800dbe | 1034 | } |
1035 | ||
0e80b01d | 1036 | static inline bool |
1037 | more_const_call_expr_args_p (const const_call_expr_arg_iterator *iter) | |
1038 | { | |
1039 | return (iter->i < iter->n); | |
1040 | } | |
1041 | ||
1042 | /* This function validates the types of a function call argument list | |
1043 | against a specified list of tree_codes. If the last specifier is a 0, | |
5cfa3fc8 | 1044 | that represents an ellipsis, otherwise the last specifier must be a |
0e80b01d | 1045 | VOID_TYPE. */ |
1046 | ||
1047 | static bool | |
1048 | validate_arglist (const_tree callexpr, ...) | |
1049 | { | |
1050 | enum tree_code code; | |
1051 | bool res = 0; | |
1052 | va_list ap; | |
1053 | const_call_expr_arg_iterator iter; | |
1054 | const_tree arg; | |
1055 | ||
1056 | va_start (ap, callexpr); | |
1057 | init_const_call_expr_arg_iterator (callexpr, &iter); | |
1058 | ||
5cfa3fc8 | 1059 | /* Get a bitmap of pointer argument numbers declared attribute nonnull. */ |
184fac50 | 1060 | tree fn = CALL_EXPR_FN (callexpr); |
1061 | bitmap argmap = get_nonnull_args (TREE_TYPE (TREE_TYPE (fn))); | |
5cfa3fc8 | 1062 | |
1063 | for (unsigned argno = 1; ; ++argno) | |
0e80b01d | 1064 | { |
1065 | code = (enum tree_code) va_arg (ap, int); | |
5cfa3fc8 | 1066 | |
0e80b01d | 1067 | switch (code) |
1068 | { | |
1069 | case 0: | |
1070 | /* This signifies an ellipses, any further arguments are all ok. */ | |
1071 | res = true; | |
1072 | goto end; | |
1073 | case VOID_TYPE: | |
1074 | /* This signifies an endlink, if no arguments remain, return | |
1075 | true, otherwise return false. */ | |
1076 | res = !more_const_call_expr_args_p (&iter); | |
1077 | goto end; | |
5cfa3fc8 | 1078 | case POINTER_TYPE: |
1079 | /* The actual argument must be nonnull when either the whole | |
1080 | called function has been declared nonnull, or when the formal | |
1081 | argument corresponding to the actual argument has been. */ | |
184fac50 | 1082 | if (argmap |
1083 | && (bitmap_empty_p (argmap) || bitmap_bit_p (argmap, argno))) | |
1084 | { | |
1085 | arg = next_const_call_expr_arg (&iter); | |
1086 | if (!validate_arg (arg, code) || integer_zerop (arg)) | |
1087 | goto end; | |
1088 | break; | |
1089 | } | |
5cfa3fc8 | 1090 | /* FALLTHRU */ |
0e80b01d | 1091 | default: |
1092 | /* If no parameters remain or the parameter's code does not | |
1093 | match the specified code, return false. Otherwise continue | |
1094 | checking any remaining arguments. */ | |
1095 | arg = next_const_call_expr_arg (&iter); | |
184fac50 | 1096 | if (!validate_arg (arg, code)) |
0e80b01d | 1097 | goto end; |
1098 | break; | |
1099 | } | |
1100 | } | |
0e80b01d | 1101 | |
1102 | /* We need gotos here since we can only have one VA_CLOSE in a | |
1103 | function. */ | |
1104 | end: ; | |
1105 | va_end (ap); | |
1106 | ||
5cfa3fc8 | 1107 | BITMAP_FREE (argmap); |
1108 | ||
0e80b01d | 1109 | return res; |
1110 | } | |
1111 | ||
4ee9c684 | 1112 | /* Expand a call to __builtin_nonlocal_goto. We're passed the target label |
1113 | and the address of the save area. */ | |
1114 | ||
1115 | static rtx | |
c2f47e15 | 1116 | expand_builtin_nonlocal_goto (tree exp) |
4ee9c684 | 1117 | { |
1118 | tree t_label, t_save_area; | |
1e0c0b35 | 1119 | rtx r_label, r_save_area, r_fp, r_sp; |
1120 | rtx_insn *insn; | |
4ee9c684 | 1121 | |
c2f47e15 | 1122 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
4ee9c684 | 1123 | return NULL_RTX; |
1124 | ||
c2f47e15 | 1125 | t_label = CALL_EXPR_ARG (exp, 0); |
1126 | t_save_area = CALL_EXPR_ARG (exp, 1); | |
4ee9c684 | 1127 | |
8ec3c5c2 | 1128 | r_label = expand_normal (t_label); |
3dce56cc | 1129 | r_label = convert_memory_address (Pmode, r_label); |
8ec3c5c2 | 1130 | r_save_area = expand_normal (t_save_area); |
3dce56cc | 1131 | r_save_area = convert_memory_address (Pmode, r_save_area); |
d1ff492e | 1132 | /* Copy the address of the save location to a register just in case it was |
1133 | based on the frame pointer. */ | |
51adbc8a | 1134 | r_save_area = copy_to_reg (r_save_area); |
4ee9c684 | 1135 | r_fp = gen_rtx_MEM (Pmode, r_save_area); |
1136 | r_sp = gen_rtx_MEM (STACK_SAVEAREA_MODE (SAVE_NONLOCAL), | |
29c05e22 | 1137 | plus_constant (Pmode, r_save_area, |
1138 | GET_MODE_SIZE (Pmode))); | |
4ee9c684 | 1139 | |
18d50ae6 | 1140 | crtl->has_nonlocal_goto = 1; |
4ee9c684 | 1141 | |
4ee9c684 | 1142 | /* ??? We no longer need to pass the static chain value, afaik. */ |
a3c81e61 | 1143 | if (targetm.have_nonlocal_goto ()) |
1144 | emit_insn (targetm.gen_nonlocal_goto (const0_rtx, r_label, r_sp, r_fp)); | |
4ee9c684 | 1145 | else |
4ee9c684 | 1146 | { |
1147 | r_label = copy_to_reg (r_label); | |
1148 | ||
18b42941 | 1149 | emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode))); |
1150 | emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx)); | |
491e04ef | 1151 | |
d1ff492e | 1152 | /* Restore frame pointer for containing function. */ |
4ee9c684 | 1153 | emit_move_insn (hard_frame_pointer_rtx, r_fp); |
e9c97615 | 1154 | emit_stack_restore (SAVE_NONLOCAL, r_sp); |
491e04ef | 1155 | |
4ee9c684 | 1156 | /* USE of hard_frame_pointer_rtx added for consistency; |
1157 | not clear if really needed. */ | |
18b42941 | 1158 | emit_use (hard_frame_pointer_rtx); |
1159 | emit_use (stack_pointer_rtx); | |
ad0d0af8 | 1160 | |
1161 | /* If the architecture is using a GP register, we must | |
1162 | conservatively assume that the target function makes use of it. | |
1163 | The prologue of functions with nonlocal gotos must therefore | |
1164 | initialize the GP register to the appropriate value, and we | |
1165 | must then make sure that this value is live at the point | |
1166 | of the jump. (Note that this doesn't necessarily apply | |
1167 | to targets with a nonlocal_goto pattern; they are free | |
1168 | to implement it in their own way. Note also that this is | |
1169 | a no-op if the GP register is a global invariant.) */ | |
1e826931 | 1170 | unsigned regnum = PIC_OFFSET_TABLE_REGNUM; |
1171 | if (regnum != INVALID_REGNUM && fixed_regs[regnum]) | |
18b42941 | 1172 | emit_use (pic_offset_table_rtx); |
ad0d0af8 | 1173 | |
4ee9c684 | 1174 | emit_indirect_jump (r_label); |
1175 | } | |
491e04ef | 1176 | |
4ee9c684 | 1177 | /* Search backwards to the jump insn and mark it as a |
1178 | non-local goto. */ | |
1179 | for (insn = get_last_insn (); insn; insn = PREV_INSN (insn)) | |
1180 | { | |
6d7dc5b9 | 1181 | if (JUMP_P (insn)) |
4ee9c684 | 1182 | { |
a1ddb869 | 1183 | add_reg_note (insn, REG_NON_LOCAL_GOTO, const0_rtx); |
4ee9c684 | 1184 | break; |
1185 | } | |
6d7dc5b9 | 1186 | else if (CALL_P (insn)) |
4ee9c684 | 1187 | break; |
1188 | } | |
1189 | ||
1190 | return const0_rtx; | |
1191 | } | |
1192 | ||
843d08a9 | 1193 | /* __builtin_update_setjmp_buf is passed a pointer to an array of five words |
1194 | (not all will be used on all machines) that was passed to __builtin_setjmp. | |
97354ae4 | 1195 | It updates the stack pointer in that block to the current value. This is |
1196 | also called directly by the SJLJ exception handling code. */ | |
843d08a9 | 1197 | |
97354ae4 | 1198 | void |
843d08a9 | 1199 | expand_builtin_update_setjmp_buf (rtx buf_addr) |
1200 | { | |
3754d046 | 1201 | machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); |
d1ff492e | 1202 | rtx stack_save |
843d08a9 | 1203 | = gen_rtx_MEM (sa_mode, |
1204 | memory_address | |
1205 | (sa_mode, | |
29c05e22 | 1206 | plus_constant (Pmode, buf_addr, |
1207 | 2 * GET_MODE_SIZE (Pmode)))); | |
843d08a9 | 1208 | |
e9c97615 | 1209 | emit_stack_save (SAVE_NONLOCAL, &stack_save); |
843d08a9 | 1210 | } |
1211 | ||
5e3608d8 | 1212 | /* Expand a call to __builtin_prefetch. For a target that does not support |
1213 | data prefetch, evaluate the memory address argument in case it has side | |
1214 | effects. */ | |
1215 | ||
1216 | static void | |
c2f47e15 | 1217 | expand_builtin_prefetch (tree exp) |
5e3608d8 | 1218 | { |
1219 | tree arg0, arg1, arg2; | |
c2f47e15 | 1220 | int nargs; |
5e3608d8 | 1221 | rtx op0, op1, op2; |
1222 | ||
c2f47e15 | 1223 | if (!validate_arglist (exp, POINTER_TYPE, 0)) |
26a5cadb | 1224 | return; |
1225 | ||
c2f47e15 | 1226 | arg0 = CALL_EXPR_ARG (exp, 0); |
1227 | ||
26a5cadb | 1228 | /* Arguments 1 and 2 are optional; argument 1 (read/write) defaults to |
1229 | zero (read) and argument 2 (locality) defaults to 3 (high degree of | |
1230 | locality). */ | |
c2f47e15 | 1231 | nargs = call_expr_nargs (exp); |
1232 | if (nargs > 1) | |
1233 | arg1 = CALL_EXPR_ARG (exp, 1); | |
26a5cadb | 1234 | else |
c2f47e15 | 1235 | arg1 = integer_zero_node; |
1236 | if (nargs > 2) | |
1237 | arg2 = CALL_EXPR_ARG (exp, 2); | |
1238 | else | |
2512209b | 1239 | arg2 = integer_three_node; |
5e3608d8 | 1240 | |
1241 | /* Argument 0 is an address. */ | |
1242 | op0 = expand_expr (arg0, NULL_RTX, Pmode, EXPAND_NORMAL); | |
1243 | ||
1244 | /* Argument 1 (read/write flag) must be a compile-time constant int. */ | |
1245 | if (TREE_CODE (arg1) != INTEGER_CST) | |
1246 | { | |
07e3a3d2 | 1247 | error ("second argument to %<__builtin_prefetch%> must be a constant"); |
9342ee68 | 1248 | arg1 = integer_zero_node; |
5e3608d8 | 1249 | } |
8ec3c5c2 | 1250 | op1 = expand_normal (arg1); |
5e3608d8 | 1251 | /* Argument 1 must be either zero or one. */ |
1252 | if (INTVAL (op1) != 0 && INTVAL (op1) != 1) | |
1253 | { | |
c3ceba8e | 1254 | warning (0, "invalid second argument to %<__builtin_prefetch%>;" |
07e3a3d2 | 1255 | " using zero"); |
5e3608d8 | 1256 | op1 = const0_rtx; |
1257 | } | |
1258 | ||
1259 | /* Argument 2 (locality) must be a compile-time constant int. */ | |
1260 | if (TREE_CODE (arg2) != INTEGER_CST) | |
1261 | { | |
07e3a3d2 | 1262 | error ("third argument to %<__builtin_prefetch%> must be a constant"); |
5e3608d8 | 1263 | arg2 = integer_zero_node; |
1264 | } | |
8ec3c5c2 | 1265 | op2 = expand_normal (arg2); |
5e3608d8 | 1266 | /* Argument 2 must be 0, 1, 2, or 3. */ |
1267 | if (INTVAL (op2) < 0 || INTVAL (op2) > 3) | |
1268 | { | |
c3ceba8e | 1269 | warning (0, "invalid third argument to %<__builtin_prefetch%>; using zero"); |
5e3608d8 | 1270 | op2 = const0_rtx; |
1271 | } | |
1272 | ||
1d375a79 | 1273 | if (targetm.have_prefetch ()) |
5e3608d8 | 1274 | { |
8786db1e | 1275 | struct expand_operand ops[3]; |
1276 | ||
1277 | create_address_operand (&ops[0], op0); | |
1278 | create_integer_operand (&ops[1], INTVAL (op1)); | |
1279 | create_integer_operand (&ops[2], INTVAL (op2)); | |
1d375a79 | 1280 | if (maybe_expand_insn (targetm.code_for_prefetch, 3, ops)) |
8786db1e | 1281 | return; |
5e3608d8 | 1282 | } |
0a534ba7 | 1283 | |
f0ce3b1f | 1284 | /* Don't do anything with direct references to volatile memory, but |
1285 | generate code to handle other side effects. */ | |
e16ceb8e | 1286 | if (!MEM_P (op0) && side_effects_p (op0)) |
f0ce3b1f | 1287 | emit_insn (op0); |
5e3608d8 | 1288 | } |
1289 | ||
f7c44134 | 1290 | /* Get a MEM rtx for expression EXP which is the address of an operand |
d8ae1baa | 1291 | to be used in a string instruction (cmpstrsi, movmemsi, ..). LEN is |
1292 | the maximum length of the block of memory that might be accessed or | |
1293 | NULL if unknown. */ | |
f7c44134 | 1294 | |
53800dbe | 1295 | static rtx |
d8ae1baa | 1296 | get_memory_rtx (tree exp, tree len) |
53800dbe | 1297 | { |
ad0a178f | 1298 | tree orig_exp = exp; |
1299 | rtx addr, mem; | |
ad0a178f | 1300 | |
1301 | /* When EXP is not resolved SAVE_EXPR, MEM_ATTRS can be still derived | |
1302 | from its expression, for expr->a.b only <variable>.a.b is recorded. */ | |
1303 | if (TREE_CODE (exp) == SAVE_EXPR && !SAVE_EXPR_RESOLVED_P (exp)) | |
1304 | exp = TREE_OPERAND (exp, 0); | |
1305 | ||
1306 | addr = expand_expr (orig_exp, NULL_RTX, ptr_mode, EXPAND_NORMAL); | |
1307 | mem = gen_rtx_MEM (BLKmode, memory_address (BLKmode, addr)); | |
2a631e19 | 1308 | |
f7c44134 | 1309 | /* Get an expression we can use to find the attributes to assign to MEM. |
5dd3f78f | 1310 | First remove any nops. */ |
72dd6141 | 1311 | while (CONVERT_EXPR_P (exp) |
f7c44134 | 1312 | && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
1313 | exp = TREE_OPERAND (exp, 0); | |
1314 | ||
5dd3f78f | 1315 | /* Build a MEM_REF representing the whole accessed area as a byte blob, |
1316 | (as builtin stringops may alias with anything). */ | |
1317 | exp = fold_build2 (MEM_REF, | |
1318 | build_array_type (char_type_node, | |
1319 | build_range_type (sizetype, | |
1320 | size_one_node, len)), | |
1321 | exp, build_int_cst (ptr_type_node, 0)); | |
1322 | ||
1323 | /* If the MEM_REF has no acceptable address, try to get the base object | |
1324 | from the original address we got, and build an all-aliasing | |
1325 | unknown-sized access to that one. */ | |
1326 | if (is_gimple_mem_ref_addr (TREE_OPERAND (exp, 0))) | |
1327 | set_mem_attributes (mem, exp, 0); | |
1328 | else if (TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR | |
1329 | && (exp = get_base_address (TREE_OPERAND (TREE_OPERAND (exp, 0), | |
1330 | 0)))) | |
eec8e941 | 1331 | { |
5dd3f78f | 1332 | exp = build_fold_addr_expr (exp); |
1333 | exp = fold_build2 (MEM_REF, | |
1334 | build_array_type (char_type_node, | |
1335 | build_range_type (sizetype, | |
1336 | size_zero_node, | |
1337 | NULL)), | |
1338 | exp, build_int_cst (ptr_type_node, 0)); | |
a1a25d19 | 1339 | set_mem_attributes (mem, exp, 0); |
eec8e941 | 1340 | } |
5dd3f78f | 1341 | set_mem_alias_set (mem, 0); |
53800dbe | 1342 | return mem; |
1343 | } | |
1344 | \f | |
1345 | /* Built-in functions to perform an untyped call and return. */ | |
1346 | ||
3b9c3a16 | 1347 | #define apply_args_mode \ |
1348 | (this_target_builtins->x_apply_args_mode) | |
1349 | #define apply_result_mode \ | |
1350 | (this_target_builtins->x_apply_result_mode) | |
53800dbe | 1351 | |
53800dbe | 1352 | /* Return the size required for the block returned by __builtin_apply_args, |
1353 | and initialize apply_args_mode. */ | |
1354 | ||
1355 | static int | |
aecda0d6 | 1356 | apply_args_size (void) |
53800dbe | 1357 | { |
1358 | static int size = -1; | |
58e9ce8f | 1359 | int align; |
1360 | unsigned int regno; | |
3754d046 | 1361 | machine_mode mode; |
53800dbe | 1362 | |
1363 | /* The values computed by this function never change. */ | |
1364 | if (size < 0) | |
1365 | { | |
1366 | /* The first value is the incoming arg-pointer. */ | |
1367 | size = GET_MODE_SIZE (Pmode); | |
1368 | ||
1369 | /* The second value is the structure value address unless this is | |
1370 | passed as an "invisible" first argument. */ | |
6812c89e | 1371 | if (targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0)) |
53800dbe | 1372 | size += GET_MODE_SIZE (Pmode); |
1373 | ||
1374 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1375 | if (FUNCTION_ARG_REGNO_P (regno)) | |
1376 | { | |
4bac51c9 | 1377 | mode = targetm.calls.get_raw_arg_mode (regno); |
0862b7e9 | 1378 | |
64db345d | 1379 | gcc_assert (mode != VOIDmode); |
53800dbe | 1380 | |
1381 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1382 | if (size % align != 0) | |
1383 | size = CEIL (size, align) * align; | |
53800dbe | 1384 | size += GET_MODE_SIZE (mode); |
1385 | apply_args_mode[regno] = mode; | |
1386 | } | |
1387 | else | |
1388 | { | |
1389 | apply_args_mode[regno] = VOIDmode; | |
53800dbe | 1390 | } |
1391 | } | |
1392 | return size; | |
1393 | } | |
1394 | ||
1395 | /* Return the size required for the block returned by __builtin_apply, | |
1396 | and initialize apply_result_mode. */ | |
1397 | ||
1398 | static int | |
aecda0d6 | 1399 | apply_result_size (void) |
53800dbe | 1400 | { |
1401 | static int size = -1; | |
1402 | int align, regno; | |
3754d046 | 1403 | machine_mode mode; |
53800dbe | 1404 | |
1405 | /* The values computed by this function never change. */ | |
1406 | if (size < 0) | |
1407 | { | |
1408 | size = 0; | |
1409 | ||
1410 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
e1ce1485 | 1411 | if (targetm.calls.function_value_regno_p (regno)) |
53800dbe | 1412 | { |
4bac51c9 | 1413 | mode = targetm.calls.get_raw_result_mode (regno); |
0862b7e9 | 1414 | |
64db345d | 1415 | gcc_assert (mode != VOIDmode); |
53800dbe | 1416 | |
1417 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1418 | if (size % align != 0) | |
1419 | size = CEIL (size, align) * align; | |
1420 | size += GET_MODE_SIZE (mode); | |
1421 | apply_result_mode[regno] = mode; | |
1422 | } | |
1423 | else | |
1424 | apply_result_mode[regno] = VOIDmode; | |
1425 | ||
1426 | /* Allow targets that use untyped_call and untyped_return to override | |
1427 | the size so that machine-specific information can be stored here. */ | |
1428 | #ifdef APPLY_RESULT_SIZE | |
1429 | size = APPLY_RESULT_SIZE; | |
1430 | #endif | |
1431 | } | |
1432 | return size; | |
1433 | } | |
1434 | ||
53800dbe | 1435 | /* Create a vector describing the result block RESULT. If SAVEP is true, |
1436 | the result block is used to save the values; otherwise it is used to | |
1437 | restore the values. */ | |
1438 | ||
1439 | static rtx | |
aecda0d6 | 1440 | result_vector (int savep, rtx result) |
53800dbe | 1441 | { |
1442 | int regno, size, align, nelts; | |
3754d046 | 1443 | machine_mode mode; |
53800dbe | 1444 | rtx reg, mem; |
364c0c59 | 1445 | rtx *savevec = XALLOCAVEC (rtx, FIRST_PSEUDO_REGISTER); |
bf8e3599 | 1446 | |
53800dbe | 1447 | size = nelts = 0; |
1448 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1449 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
1450 | { | |
1451 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1452 | if (size % align != 0) | |
1453 | size = CEIL (size, align) * align; | |
1454 | reg = gen_rtx_REG (mode, savep ? regno : INCOMING_REGNO (regno)); | |
e513d163 | 1455 | mem = adjust_address (result, mode, size); |
53800dbe | 1456 | savevec[nelts++] = (savep |
d1f9b275 | 1457 | ? gen_rtx_SET (mem, reg) |
1458 | : gen_rtx_SET (reg, mem)); | |
53800dbe | 1459 | size += GET_MODE_SIZE (mode); |
1460 | } | |
1461 | return gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (nelts, savevec)); | |
1462 | } | |
53800dbe | 1463 | |
1464 | /* Save the state required to perform an untyped call with the same | |
1465 | arguments as were passed to the current function. */ | |
1466 | ||
1467 | static rtx | |
aecda0d6 | 1468 | expand_builtin_apply_args_1 (void) |
53800dbe | 1469 | { |
1c7e61a7 | 1470 | rtx registers, tem; |
53800dbe | 1471 | int size, align, regno; |
3754d046 | 1472 | machine_mode mode; |
6812c89e | 1473 | rtx struct_incoming_value = targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 1); |
53800dbe | 1474 | |
1475 | /* Create a block where the arg-pointer, structure value address, | |
1476 | and argument registers can be saved. */ | |
1477 | registers = assign_stack_local (BLKmode, apply_args_size (), -1); | |
1478 | ||
1479 | /* Walk past the arg-pointer and structure value address. */ | |
1480 | size = GET_MODE_SIZE (Pmode); | |
6812c89e | 1481 | if (targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0)) |
53800dbe | 1482 | size += GET_MODE_SIZE (Pmode); |
1483 | ||
1484 | /* Save each register used in calling a function to the block. */ | |
1485 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1486 | if ((mode = apply_args_mode[regno]) != VOIDmode) | |
1487 | { | |
53800dbe | 1488 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; |
1489 | if (size % align != 0) | |
1490 | size = CEIL (size, align) * align; | |
1491 | ||
1492 | tem = gen_rtx_REG (mode, INCOMING_REGNO (regno)); | |
1493 | ||
e513d163 | 1494 | emit_move_insn (adjust_address (registers, mode, size), tem); |
53800dbe | 1495 | size += GET_MODE_SIZE (mode); |
1496 | } | |
1497 | ||
1498 | /* Save the arg pointer to the block. */ | |
27a7a23a | 1499 | tem = copy_to_reg (crtl->args.internal_arg_pointer); |
1c7e61a7 | 1500 | /* We need the pointer as the caller actually passed them to us, not |
9d4b544c | 1501 | as we might have pretended they were passed. Make sure it's a valid |
1502 | operand, as emit_move_insn isn't expected to handle a PLUS. */ | |
3764c94e | 1503 | if (STACK_GROWS_DOWNWARD) |
1504 | tem | |
1505 | = force_operand (plus_constant (Pmode, tem, | |
1506 | crtl->args.pretend_args_size), | |
1507 | NULL_RTX); | |
1c7e61a7 | 1508 | emit_move_insn (adjust_address (registers, Pmode, 0), tem); |
0862b7e9 | 1509 | |
53800dbe | 1510 | size = GET_MODE_SIZE (Pmode); |
1511 | ||
1512 | /* Save the structure value address unless this is passed as an | |
1513 | "invisible" first argument. */ | |
45550790 | 1514 | if (struct_incoming_value) |
53800dbe | 1515 | { |
e513d163 | 1516 | emit_move_insn (adjust_address (registers, Pmode, size), |
45550790 | 1517 | copy_to_reg (struct_incoming_value)); |
53800dbe | 1518 | size += GET_MODE_SIZE (Pmode); |
1519 | } | |
1520 | ||
1521 | /* Return the address of the block. */ | |
1522 | return copy_addr_to_reg (XEXP (registers, 0)); | |
1523 | } | |
1524 | ||
1525 | /* __builtin_apply_args returns block of memory allocated on | |
1526 | the stack into which is stored the arg pointer, structure | |
1527 | value address, static chain, and all the registers that might | |
1528 | possibly be used in performing a function call. The code is | |
1529 | moved to the start of the function so the incoming values are | |
1530 | saved. */ | |
27d0c333 | 1531 | |
53800dbe | 1532 | static rtx |
aecda0d6 | 1533 | expand_builtin_apply_args (void) |
53800dbe | 1534 | { |
1535 | /* Don't do __builtin_apply_args more than once in a function. | |
1536 | Save the result of the first call and reuse it. */ | |
1537 | if (apply_args_value != 0) | |
1538 | return apply_args_value; | |
1539 | { | |
1540 | /* When this function is called, it means that registers must be | |
1541 | saved on entry to this function. So we migrate the | |
1542 | call to the first insn of this function. */ | |
1543 | rtx temp; | |
53800dbe | 1544 | |
1545 | start_sequence (); | |
1546 | temp = expand_builtin_apply_args_1 (); | |
9ed997be | 1547 | rtx_insn *seq = get_insns (); |
53800dbe | 1548 | end_sequence (); |
1549 | ||
1550 | apply_args_value = temp; | |
1551 | ||
31d3e01c | 1552 | /* Put the insns after the NOTE that starts the function. |
1553 | If this is inside a start_sequence, make the outer-level insn | |
53800dbe | 1554 | chain current, so the code is placed at the start of the |
0ef1a651 | 1555 | function. If internal_arg_pointer is a non-virtual pseudo, |
1556 | it needs to be placed after the function that initializes | |
1557 | that pseudo. */ | |
53800dbe | 1558 | push_topmost_sequence (); |
0ef1a651 | 1559 | if (REG_P (crtl->args.internal_arg_pointer) |
1560 | && REGNO (crtl->args.internal_arg_pointer) > LAST_VIRTUAL_REGISTER) | |
1561 | emit_insn_before (seq, parm_birth_insn); | |
1562 | else | |
1563 | emit_insn_before (seq, NEXT_INSN (entry_of_function ())); | |
53800dbe | 1564 | pop_topmost_sequence (); |
1565 | return temp; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | /* Perform an untyped call and save the state required to perform an | |
1570 | untyped return of whatever value was returned by the given function. */ | |
1571 | ||
1572 | static rtx | |
aecda0d6 | 1573 | expand_builtin_apply (rtx function, rtx arguments, rtx argsize) |
53800dbe | 1574 | { |
1575 | int size, align, regno; | |
3754d046 | 1576 | machine_mode mode; |
1e0c0b35 | 1577 | rtx incoming_args, result, reg, dest, src; |
1578 | rtx_call_insn *call_insn; | |
53800dbe | 1579 | rtx old_stack_level = 0; |
1580 | rtx call_fusage = 0; | |
6812c89e | 1581 | rtx struct_value = targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0); |
53800dbe | 1582 | |
85d654dd | 1583 | arguments = convert_memory_address (Pmode, arguments); |
726ec87c | 1584 | |
53800dbe | 1585 | /* Create a block where the return registers can be saved. */ |
1586 | result = assign_stack_local (BLKmode, apply_result_size (), -1); | |
1587 | ||
53800dbe | 1588 | /* Fetch the arg pointer from the ARGUMENTS block. */ |
1589 | incoming_args = gen_reg_rtx (Pmode); | |
726ec87c | 1590 | emit_move_insn (incoming_args, gen_rtx_MEM (Pmode, arguments)); |
3764c94e | 1591 | if (!STACK_GROWS_DOWNWARD) |
1592 | incoming_args = expand_simple_binop (Pmode, MINUS, incoming_args, argsize, | |
1593 | incoming_args, 0, OPTAB_LIB_WIDEN); | |
53800dbe | 1594 | |
04a46d40 | 1595 | /* Push a new argument block and copy the arguments. Do not allow |
1596 | the (potential) memcpy call below to interfere with our stack | |
1597 | manipulations. */ | |
53800dbe | 1598 | do_pending_stack_adjust (); |
04a46d40 | 1599 | NO_DEFER_POP; |
53800dbe | 1600 | |
2358393e | 1601 | /* Save the stack with nonlocal if available. */ |
71512c05 | 1602 | if (targetm.have_save_stack_nonlocal ()) |
e9c97615 | 1603 | emit_stack_save (SAVE_NONLOCAL, &old_stack_level); |
53800dbe | 1604 | else |
e9c97615 | 1605 | emit_stack_save (SAVE_BLOCK, &old_stack_level); |
53800dbe | 1606 | |
59647703 | 1607 | /* Allocate a block of memory onto the stack and copy the memory |
990495a7 | 1608 | arguments to the outgoing arguments address. We can pass TRUE |
1609 | as the 4th argument because we just saved the stack pointer | |
1610 | and will restore it right after the call. */ | |
5be42b39 | 1611 | allocate_dynamic_stack_space (argsize, 0, BIGGEST_ALIGNMENT, true); |
27a7a23a | 1612 | |
1613 | /* Set DRAP flag to true, even though allocate_dynamic_stack_space | |
1614 | may have already set current_function_calls_alloca to true. | |
1615 | current_function_calls_alloca won't be set if argsize is zero, | |
1616 | so we have to guarantee need_drap is true here. */ | |
1617 | if (SUPPORTS_STACK_ALIGNMENT) | |
1618 | crtl->need_drap = true; | |
1619 | ||
59647703 | 1620 | dest = virtual_outgoing_args_rtx; |
3764c94e | 1621 | if (!STACK_GROWS_DOWNWARD) |
1622 | { | |
1623 | if (CONST_INT_P (argsize)) | |
1624 | dest = plus_constant (Pmode, dest, -INTVAL (argsize)); | |
1625 | else | |
1626 | dest = gen_rtx_PLUS (Pmode, dest, negate_rtx (Pmode, argsize)); | |
1627 | } | |
2a631e19 | 1628 | dest = gen_rtx_MEM (BLKmode, dest); |
1629 | set_mem_align (dest, PARM_BOUNDARY); | |
1630 | src = gen_rtx_MEM (BLKmode, incoming_args); | |
1631 | set_mem_align (src, PARM_BOUNDARY); | |
0378dbdc | 1632 | emit_block_move (dest, src, argsize, BLOCK_OP_NORMAL); |
53800dbe | 1633 | |
1634 | /* Refer to the argument block. */ | |
1635 | apply_args_size (); | |
1636 | arguments = gen_rtx_MEM (BLKmode, arguments); | |
2a631e19 | 1637 | set_mem_align (arguments, PARM_BOUNDARY); |
53800dbe | 1638 | |
1639 | /* Walk past the arg-pointer and structure value address. */ | |
1640 | size = GET_MODE_SIZE (Pmode); | |
45550790 | 1641 | if (struct_value) |
53800dbe | 1642 | size += GET_MODE_SIZE (Pmode); |
1643 | ||
1644 | /* Restore each of the registers previously saved. Make USE insns | |
1645 | for each of these registers for use in making the call. */ | |
1646 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1647 | if ((mode = apply_args_mode[regno]) != VOIDmode) | |
1648 | { | |
1649 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1650 | if (size % align != 0) | |
1651 | size = CEIL (size, align) * align; | |
1652 | reg = gen_rtx_REG (mode, regno); | |
e513d163 | 1653 | emit_move_insn (reg, adjust_address (arguments, mode, size)); |
53800dbe | 1654 | use_reg (&call_fusage, reg); |
1655 | size += GET_MODE_SIZE (mode); | |
1656 | } | |
1657 | ||
1658 | /* Restore the structure value address unless this is passed as an | |
1659 | "invisible" first argument. */ | |
1660 | size = GET_MODE_SIZE (Pmode); | |
45550790 | 1661 | if (struct_value) |
53800dbe | 1662 | { |
1663 | rtx value = gen_reg_rtx (Pmode); | |
e513d163 | 1664 | emit_move_insn (value, adjust_address (arguments, Pmode, size)); |
45550790 | 1665 | emit_move_insn (struct_value, value); |
8ad4c111 | 1666 | if (REG_P (struct_value)) |
45550790 | 1667 | use_reg (&call_fusage, struct_value); |
53800dbe | 1668 | size += GET_MODE_SIZE (Pmode); |
1669 | } | |
1670 | ||
1671 | /* All arguments and registers used for the call are set up by now! */ | |
82c7907c | 1672 | function = prepare_call_address (NULL, function, NULL, &call_fusage, 0, 0); |
53800dbe | 1673 | |
1674 | /* Ensure address is valid. SYMBOL_REF is already valid, so no need, | |
1675 | and we don't want to load it into a register as an optimization, | |
1676 | because prepare_call_address already did it if it should be done. */ | |
1677 | if (GET_CODE (function) != SYMBOL_REF) | |
1678 | function = memory_address (FUNCTION_MODE, function); | |
1679 | ||
1680 | /* Generate the actual call instruction and save the return value. */ | |
1d99ab0a | 1681 | if (targetm.have_untyped_call ()) |
1682 | { | |
1683 | rtx mem = gen_rtx_MEM (FUNCTION_MODE, function); | |
1684 | emit_call_insn (targetm.gen_untyped_call (mem, result, | |
1685 | result_vector (1, result))); | |
1686 | } | |
7f265a08 | 1687 | else if (targetm.have_call_value ()) |
53800dbe | 1688 | { |
1689 | rtx valreg = 0; | |
1690 | ||
1691 | /* Locate the unique return register. It is not possible to | |
1692 | express a call that sets more than one return register using | |
1693 | call_value; use untyped_call for that. In fact, untyped_call | |
1694 | only needs to save the return registers in the given block. */ | |
1695 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1696 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
1697 | { | |
7f265a08 | 1698 | gcc_assert (!valreg); /* have_untyped_call required. */ |
7d3f6cc7 | 1699 | |
53800dbe | 1700 | valreg = gen_rtx_REG (mode, regno); |
1701 | } | |
1702 | ||
7f265a08 | 1703 | emit_insn (targetm.gen_call_value (valreg, |
1704 | gen_rtx_MEM (FUNCTION_MODE, function), | |
1705 | const0_rtx, NULL_RTX, const0_rtx)); | |
53800dbe | 1706 | |
e513d163 | 1707 | emit_move_insn (adjust_address (result, GET_MODE (valreg), 0), valreg); |
53800dbe | 1708 | } |
1709 | else | |
64db345d | 1710 | gcc_unreachable (); |
53800dbe | 1711 | |
d5f9786f | 1712 | /* Find the CALL insn we just emitted, and attach the register usage |
1713 | information. */ | |
1714 | call_insn = last_call_insn (); | |
1715 | add_function_usage_to (call_insn, call_fusage); | |
53800dbe | 1716 | |
1717 | /* Restore the stack. */ | |
71512c05 | 1718 | if (targetm.have_save_stack_nonlocal ()) |
e9c97615 | 1719 | emit_stack_restore (SAVE_NONLOCAL, old_stack_level); |
53800dbe | 1720 | else |
e9c97615 | 1721 | emit_stack_restore (SAVE_BLOCK, old_stack_level); |
9af5ce0c | 1722 | fixup_args_size_notes (call_insn, get_last_insn (), 0); |
53800dbe | 1723 | |
04a46d40 | 1724 | OK_DEFER_POP; |
1725 | ||
53800dbe | 1726 | /* Return the address of the result block. */ |
85d654dd | 1727 | result = copy_addr_to_reg (XEXP (result, 0)); |
1728 | return convert_memory_address (ptr_mode, result); | |
53800dbe | 1729 | } |
1730 | ||
1731 | /* Perform an untyped return. */ | |
1732 | ||
1733 | static void | |
aecda0d6 | 1734 | expand_builtin_return (rtx result) |
53800dbe | 1735 | { |
1736 | int size, align, regno; | |
3754d046 | 1737 | machine_mode mode; |
53800dbe | 1738 | rtx reg; |
57c26b3a | 1739 | rtx_insn *call_fusage = 0; |
53800dbe | 1740 | |
85d654dd | 1741 | result = convert_memory_address (Pmode, result); |
726ec87c | 1742 | |
53800dbe | 1743 | apply_result_size (); |
1744 | result = gen_rtx_MEM (BLKmode, result); | |
1745 | ||
1d99ab0a | 1746 | if (targetm.have_untyped_return ()) |
53800dbe | 1747 | { |
1d99ab0a | 1748 | rtx vector = result_vector (0, result); |
1749 | emit_jump_insn (targetm.gen_untyped_return (result, vector)); | |
53800dbe | 1750 | emit_barrier (); |
1751 | return; | |
1752 | } | |
53800dbe | 1753 | |
1754 | /* Restore the return value and note that each value is used. */ | |
1755 | size = 0; | |
1756 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
1757 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
1758 | { | |
1759 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
1760 | if (size % align != 0) | |
1761 | size = CEIL (size, align) * align; | |
1762 | reg = gen_rtx_REG (mode, INCOMING_REGNO (regno)); | |
e513d163 | 1763 | emit_move_insn (reg, adjust_address (result, mode, size)); |
53800dbe | 1764 | |
1765 | push_to_sequence (call_fusage); | |
18b42941 | 1766 | emit_use (reg); |
53800dbe | 1767 | call_fusage = get_insns (); |
1768 | end_sequence (); | |
1769 | size += GET_MODE_SIZE (mode); | |
1770 | } | |
1771 | ||
1772 | /* Put the USE insns before the return. */ | |
31d3e01c | 1773 | emit_insn (call_fusage); |
53800dbe | 1774 | |
1775 | /* Return whatever values was restored by jumping directly to the end | |
1776 | of the function. */ | |
62380d2d | 1777 | expand_naked_return (); |
53800dbe | 1778 | } |
1779 | ||
539a3a92 | 1780 | /* Used by expand_builtin_classify_type and fold_builtin_classify_type. */ |
27d0c333 | 1781 | |
539a3a92 | 1782 | static enum type_class |
aecda0d6 | 1783 | type_to_class (tree type) |
539a3a92 | 1784 | { |
1785 | switch (TREE_CODE (type)) | |
1786 | { | |
1787 | case VOID_TYPE: return void_type_class; | |
1788 | case INTEGER_TYPE: return integer_type_class; | |
539a3a92 | 1789 | case ENUMERAL_TYPE: return enumeral_type_class; |
1790 | case BOOLEAN_TYPE: return boolean_type_class; | |
1791 | case POINTER_TYPE: return pointer_type_class; | |
1792 | case REFERENCE_TYPE: return reference_type_class; | |
1793 | case OFFSET_TYPE: return offset_type_class; | |
1794 | case REAL_TYPE: return real_type_class; | |
1795 | case COMPLEX_TYPE: return complex_type_class; | |
1796 | case FUNCTION_TYPE: return function_type_class; | |
1797 | case METHOD_TYPE: return method_type_class; | |
1798 | case RECORD_TYPE: return record_type_class; | |
1799 | case UNION_TYPE: | |
1800 | case QUAL_UNION_TYPE: return union_type_class; | |
1801 | case ARRAY_TYPE: return (TYPE_STRING_FLAG (type) | |
1802 | ? string_type_class : array_type_class); | |
539a3a92 | 1803 | case LANG_TYPE: return lang_type_class; |
1804 | default: return no_type_class; | |
1805 | } | |
1806 | } | |
bf8e3599 | 1807 | |
c2f47e15 | 1808 | /* Expand a call EXP to __builtin_classify_type. */ |
27d0c333 | 1809 | |
53800dbe | 1810 | static rtx |
c2f47e15 | 1811 | expand_builtin_classify_type (tree exp) |
53800dbe | 1812 | { |
c2f47e15 | 1813 | if (call_expr_nargs (exp)) |
1814 | return GEN_INT (type_to_class (TREE_TYPE (CALL_EXPR_ARG (exp, 0)))); | |
53800dbe | 1815 | return GEN_INT (no_type_class); |
1816 | } | |
1817 | ||
07976da7 | 1818 | /* This helper macro, meant to be used in mathfn_built_in below, |
1819 | determines which among a set of three builtin math functions is | |
1820 | appropriate for a given type mode. The `F' and `L' cases are | |
1821 | automatically generated from the `double' case. */ | |
e3240774 | 1822 | #define CASE_MATHFN(MATHFN) \ |
1823 | CASE_CFN_##MATHFN: \ | |
1824 | fcode = BUILT_IN_##MATHFN; fcodef = BUILT_IN_##MATHFN##F ; \ | |
1825 | fcodel = BUILT_IN_##MATHFN##L ; break; | |
cd2656b0 | 1826 | /* Similar to above, but appends _R after any F/L suffix. */ |
e3240774 | 1827 | #define CASE_MATHFN_REENT(MATHFN) \ |
1828 | case CFN_BUILT_IN_##MATHFN##_R: \ | |
1829 | case CFN_BUILT_IN_##MATHFN##F_R: \ | |
1830 | case CFN_BUILT_IN_##MATHFN##L_R: \ | |
1831 | fcode = BUILT_IN_##MATHFN##_R; fcodef = BUILT_IN_##MATHFN##F_R ; \ | |
1832 | fcodel = BUILT_IN_##MATHFN##L_R ; break; | |
07976da7 | 1833 | |
6c21be92 | 1834 | /* Return a function equivalent to FN but operating on floating-point |
1835 | values of type TYPE, or END_BUILTINS if no such function exists. | |
e3240774 | 1836 | This is purely an operation on function codes; it does not guarantee |
1837 | that the target actually has an implementation of the function. */ | |
c319d56a | 1838 | |
6c21be92 | 1839 | static built_in_function |
e3240774 | 1840 | mathfn_built_in_2 (tree type, combined_fn fn) |
0a68165a | 1841 | { |
6c21be92 | 1842 | built_in_function fcode, fcodef, fcodel; |
07976da7 | 1843 | |
1844 | switch (fn) | |
1845 | { | |
e3240774 | 1846 | CASE_MATHFN (ACOS) |
1847 | CASE_MATHFN (ACOSH) | |
1848 | CASE_MATHFN (ASIN) | |
1849 | CASE_MATHFN (ASINH) | |
1850 | CASE_MATHFN (ATAN) | |
1851 | CASE_MATHFN (ATAN2) | |
1852 | CASE_MATHFN (ATANH) | |
1853 | CASE_MATHFN (CBRT) | |
1854 | CASE_MATHFN (CEIL) | |
1855 | CASE_MATHFN (CEXPI) | |
1856 | CASE_MATHFN (COPYSIGN) | |
1857 | CASE_MATHFN (COS) | |
1858 | CASE_MATHFN (COSH) | |
1859 | CASE_MATHFN (DREM) | |
1860 | CASE_MATHFN (ERF) | |
1861 | CASE_MATHFN (ERFC) | |
1862 | CASE_MATHFN (EXP) | |
1863 | CASE_MATHFN (EXP10) | |
1864 | CASE_MATHFN (EXP2) | |
1865 | CASE_MATHFN (EXPM1) | |
1866 | CASE_MATHFN (FABS) | |
1867 | CASE_MATHFN (FDIM) | |
1868 | CASE_MATHFN (FLOOR) | |
1869 | CASE_MATHFN (FMA) | |
1870 | CASE_MATHFN (FMAX) | |
1871 | CASE_MATHFN (FMIN) | |
1872 | CASE_MATHFN (FMOD) | |
1873 | CASE_MATHFN (FREXP) | |
1874 | CASE_MATHFN (GAMMA) | |
1875 | CASE_MATHFN_REENT (GAMMA) /* GAMMA_R */ | |
1876 | CASE_MATHFN (HUGE_VAL) | |
1877 | CASE_MATHFN (HYPOT) | |
1878 | CASE_MATHFN (ILOGB) | |
1879 | CASE_MATHFN (ICEIL) | |
1880 | CASE_MATHFN (IFLOOR) | |
1881 | CASE_MATHFN (INF) | |
1882 | CASE_MATHFN (IRINT) | |
1883 | CASE_MATHFN (IROUND) | |
1884 | CASE_MATHFN (ISINF) | |
1885 | CASE_MATHFN (J0) | |
1886 | CASE_MATHFN (J1) | |
1887 | CASE_MATHFN (JN) | |
1888 | CASE_MATHFN (LCEIL) | |
1889 | CASE_MATHFN (LDEXP) | |
1890 | CASE_MATHFN (LFLOOR) | |
1891 | CASE_MATHFN (LGAMMA) | |
1892 | CASE_MATHFN_REENT (LGAMMA) /* LGAMMA_R */ | |
1893 | CASE_MATHFN (LLCEIL) | |
1894 | CASE_MATHFN (LLFLOOR) | |
1895 | CASE_MATHFN (LLRINT) | |
1896 | CASE_MATHFN (LLROUND) | |
1897 | CASE_MATHFN (LOG) | |
1898 | CASE_MATHFN (LOG10) | |
1899 | CASE_MATHFN (LOG1P) | |
1900 | CASE_MATHFN (LOG2) | |
1901 | CASE_MATHFN (LOGB) | |
1902 | CASE_MATHFN (LRINT) | |
1903 | CASE_MATHFN (LROUND) | |
1904 | CASE_MATHFN (MODF) | |
1905 | CASE_MATHFN (NAN) | |
1906 | CASE_MATHFN (NANS) | |
1907 | CASE_MATHFN (NEARBYINT) | |
1908 | CASE_MATHFN (NEXTAFTER) | |
1909 | CASE_MATHFN (NEXTTOWARD) | |
1910 | CASE_MATHFN (POW) | |
1911 | CASE_MATHFN (POWI) | |
1912 | CASE_MATHFN (POW10) | |
1913 | CASE_MATHFN (REMAINDER) | |
1914 | CASE_MATHFN (REMQUO) | |
1915 | CASE_MATHFN (RINT) | |
1916 | CASE_MATHFN (ROUND) | |
1917 | CASE_MATHFN (SCALB) | |
1918 | CASE_MATHFN (SCALBLN) | |
1919 | CASE_MATHFN (SCALBN) | |
1920 | CASE_MATHFN (SIGNBIT) | |
1921 | CASE_MATHFN (SIGNIFICAND) | |
1922 | CASE_MATHFN (SIN) | |
1923 | CASE_MATHFN (SINCOS) | |
1924 | CASE_MATHFN (SINH) | |
1925 | CASE_MATHFN (SQRT) | |
1926 | CASE_MATHFN (TAN) | |
1927 | CASE_MATHFN (TANH) | |
1928 | CASE_MATHFN (TGAMMA) | |
1929 | CASE_MATHFN (TRUNC) | |
1930 | CASE_MATHFN (Y0) | |
1931 | CASE_MATHFN (Y1) | |
1932 | CASE_MATHFN (YN) | |
07976da7 | 1933 | |
e3240774 | 1934 | default: |
1935 | return END_BUILTINS; | |
1936 | } | |
07976da7 | 1937 | |
96b9f485 | 1938 | if (TYPE_MAIN_VARIANT (type) == double_type_node) |
6c21be92 | 1939 | return fcode; |
96b9f485 | 1940 | else if (TYPE_MAIN_VARIANT (type) == float_type_node) |
6c21be92 | 1941 | return fcodef; |
96b9f485 | 1942 | else if (TYPE_MAIN_VARIANT (type) == long_double_type_node) |
6c21be92 | 1943 | return fcodel; |
07976da7 | 1944 | else |
6c21be92 | 1945 | return END_BUILTINS; |
1946 | } | |
1947 | ||
1948 | /* Return mathematic function equivalent to FN but operating directly on TYPE, | |
1949 | if available. If IMPLICIT_P is true use the implicit builtin declaration, | |
1950 | otherwise use the explicit declaration. If we can't do the conversion, | |
1951 | return null. */ | |
1952 | ||
1953 | static tree | |
e3240774 | 1954 | mathfn_built_in_1 (tree type, combined_fn fn, bool implicit_p) |
6c21be92 | 1955 | { |
1956 | built_in_function fcode2 = mathfn_built_in_2 (type, fn); | |
1957 | if (fcode2 == END_BUILTINS) | |
c2f47e15 | 1958 | return NULL_TREE; |
b9a16870 | 1959 | |
1960 | if (implicit_p && !builtin_decl_implicit_p (fcode2)) | |
1961 | return NULL_TREE; | |
1962 | ||
1963 | return builtin_decl_explicit (fcode2); | |
0a68165a | 1964 | } |
1965 | ||
e3240774 | 1966 | /* Like mathfn_built_in_1, but always use the implicit array. */ |
c319d56a | 1967 | |
1968 | tree | |
e3240774 | 1969 | mathfn_built_in (tree type, combined_fn fn) |
c319d56a | 1970 | { |
1971 | return mathfn_built_in_1 (type, fn, /*implicit=*/ 1); | |
1972 | } | |
1973 | ||
e3240774 | 1974 | /* Like mathfn_built_in_1, but take a built_in_function and |
1975 | always use the implicit array. */ | |
1976 | ||
1977 | tree | |
1978 | mathfn_built_in (tree type, enum built_in_function fn) | |
1979 | { | |
1980 | return mathfn_built_in_1 (type, as_combined_fn (fn), /*implicit=*/ 1); | |
1981 | } | |
1982 | ||
1f24b8e9 | 1983 | /* If BUILT_IN_NORMAL function FNDECL has an associated internal function, |
1984 | return its code, otherwise return IFN_LAST. Note that this function | |
1985 | only tests whether the function is defined in internals.def, not whether | |
1986 | it is actually available on the target. */ | |
1987 | ||
1988 | internal_fn | |
1989 | associated_internal_fn (tree fndecl) | |
1990 | { | |
1991 | gcc_checking_assert (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL); | |
1992 | tree return_type = TREE_TYPE (TREE_TYPE (fndecl)); | |
1993 | switch (DECL_FUNCTION_CODE (fndecl)) | |
1994 | { | |
1995 | #define DEF_INTERNAL_FLT_FN(NAME, FLAGS, OPTAB, TYPE) \ | |
1996 | CASE_FLT_FN (BUILT_IN_##NAME): return IFN_##NAME; | |
c9452b7c | 1997 | #define DEF_INTERNAL_INT_FN(NAME, FLAGS, OPTAB, TYPE) \ |
1998 | CASE_INT_FN (BUILT_IN_##NAME): return IFN_##NAME; | |
1f24b8e9 | 1999 | #include "internal-fn.def" |
2000 | ||
2001 | CASE_FLT_FN (BUILT_IN_POW10): | |
2002 | return IFN_EXP10; | |
2003 | ||
2004 | CASE_FLT_FN (BUILT_IN_DREM): | |
2005 | return IFN_REMAINDER; | |
2006 | ||
2007 | CASE_FLT_FN (BUILT_IN_SCALBN): | |
2008 | CASE_FLT_FN (BUILT_IN_SCALBLN): | |
2009 | if (REAL_MODE_FORMAT (TYPE_MODE (return_type))->b == 2) | |
2010 | return IFN_LDEXP; | |
2011 | return IFN_LAST; | |
2012 | ||
2013 | default: | |
2014 | return IFN_LAST; | |
2015 | } | |
2016 | } | |
2017 | ||
2018 | /* If CALL is a call to a BUILT_IN_NORMAL function that could be replaced | |
2019 | on the current target by a call to an internal function, return the | |
2020 | code of that internal function, otherwise return IFN_LAST. The caller | |
2021 | is responsible for ensuring that any side-effects of the built-in | |
2022 | call are dealt with correctly. E.g. if CALL sets errno, the caller | |
2023 | must decide that the errno result isn't needed or make it available | |
2024 | in some other way. */ | |
2025 | ||
2026 | internal_fn | |
2027 | replacement_internal_fn (gcall *call) | |
2028 | { | |
2029 | if (gimple_call_builtin_p (call, BUILT_IN_NORMAL)) | |
2030 | { | |
2031 | internal_fn ifn = associated_internal_fn (gimple_call_fndecl (call)); | |
2032 | if (ifn != IFN_LAST) | |
2033 | { | |
2034 | tree_pair types = direct_internal_fn_types (ifn, call); | |
acdfe9e0 | 2035 | optimization_type opt_type = bb_optimization_type (gimple_bb (call)); |
2036 | if (direct_internal_fn_supported_p (ifn, types, opt_type)) | |
1f24b8e9 | 2037 | return ifn; |
2038 | } | |
2039 | } | |
2040 | return IFN_LAST; | |
2041 | } | |
2042 | ||
7e0713b1 | 2043 | /* Expand a call to the builtin trinary math functions (fma). |
2044 | Return NULL_RTX if a normal call should be emitted rather than expanding the | |
2045 | function in-line. EXP is the expression that is a call to the builtin | |
2046 | function; if convenient, the result should be placed in TARGET. | |
2047 | SUBTARGET may be used as the target for computing one of EXP's | |
2048 | operands. */ | |
2049 | ||
2050 | static rtx | |
2051 | expand_builtin_mathfn_ternary (tree exp, rtx target, rtx subtarget) | |
2052 | { | |
2053 | optab builtin_optab; | |
1e0c0b35 | 2054 | rtx op0, op1, op2, result; |
2055 | rtx_insn *insns; | |
7e0713b1 | 2056 | tree fndecl = get_callee_fndecl (exp); |
2057 | tree arg0, arg1, arg2; | |
3754d046 | 2058 | machine_mode mode; |
7e0713b1 | 2059 | |
2060 | if (!validate_arglist (exp, REAL_TYPE, REAL_TYPE, REAL_TYPE, VOID_TYPE)) | |
2061 | return NULL_RTX; | |
2062 | ||
2063 | arg0 = CALL_EXPR_ARG (exp, 0); | |
2064 | arg1 = CALL_EXPR_ARG (exp, 1); | |
2065 | arg2 = CALL_EXPR_ARG (exp, 2); | |
2066 | ||
2067 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2068 | { | |
2069 | CASE_FLT_FN (BUILT_IN_FMA): | |
2070 | builtin_optab = fma_optab; break; | |
2071 | default: | |
2072 | gcc_unreachable (); | |
2073 | } | |
2074 | ||
2075 | /* Make a suitable register to place result in. */ | |
2076 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
2077 | ||
2078 | /* Before working hard, check whether the instruction is available. */ | |
2079 | if (optab_handler (builtin_optab, mode) == CODE_FOR_nothing) | |
2080 | return NULL_RTX; | |
2081 | ||
de2e453e | 2082 | result = gen_reg_rtx (mode); |
7e0713b1 | 2083 | |
2084 | /* Always stabilize the argument list. */ | |
2085 | CALL_EXPR_ARG (exp, 0) = arg0 = builtin_save_expr (arg0); | |
2086 | CALL_EXPR_ARG (exp, 1) = arg1 = builtin_save_expr (arg1); | |
2087 | CALL_EXPR_ARG (exp, 2) = arg2 = builtin_save_expr (arg2); | |
2088 | ||
2089 | op0 = expand_expr (arg0, subtarget, VOIDmode, EXPAND_NORMAL); | |
2090 | op1 = expand_normal (arg1); | |
2091 | op2 = expand_normal (arg2); | |
2092 | ||
2093 | start_sequence (); | |
2094 | ||
de2e453e | 2095 | /* Compute into RESULT. |
2096 | Set RESULT to wherever the result comes back. */ | |
2097 | result = expand_ternary_op (mode, builtin_optab, op0, op1, op2, | |
2098 | result, 0); | |
7e0713b1 | 2099 | |
2100 | /* If we were unable to expand via the builtin, stop the sequence | |
2101 | (without outputting the insns) and call to the library function | |
2102 | with the stabilized argument list. */ | |
de2e453e | 2103 | if (result == 0) |
7e0713b1 | 2104 | { |
2105 | end_sequence (); | |
2106 | return expand_call (exp, target, target == const0_rtx); | |
2107 | } | |
2108 | ||
2109 | /* Output the entire sequence. */ | |
2110 | insns = get_insns (); | |
2111 | end_sequence (); | |
2112 | emit_insn (insns); | |
2113 | ||
de2e453e | 2114 | return result; |
7e0713b1 | 2115 | } |
2116 | ||
6b43bae4 | 2117 | /* Expand a call to the builtin sin and cos math functions. |
c2f47e15 | 2118 | Return NULL_RTX if a normal call should be emitted rather than expanding the |
6b43bae4 | 2119 | function in-line. EXP is the expression that is a call to the builtin |
2120 | function; if convenient, the result should be placed in TARGET. | |
2121 | SUBTARGET may be used as the target for computing one of EXP's | |
2122 | operands. */ | |
2123 | ||
2124 | static rtx | |
2125 | expand_builtin_mathfn_3 (tree exp, rtx target, rtx subtarget) | |
2126 | { | |
2127 | optab builtin_optab; | |
1e0c0b35 | 2128 | rtx op0; |
2129 | rtx_insn *insns; | |
6b43bae4 | 2130 | tree fndecl = get_callee_fndecl (exp); |
3754d046 | 2131 | machine_mode mode; |
abfea505 | 2132 | tree arg; |
6b43bae4 | 2133 | |
c2f47e15 | 2134 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
2135 | return NULL_RTX; | |
6b43bae4 | 2136 | |
c2f47e15 | 2137 | arg = CALL_EXPR_ARG (exp, 0); |
6b43bae4 | 2138 | |
2139 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2140 | { | |
4f35b1fc | 2141 | CASE_FLT_FN (BUILT_IN_SIN): |
2142 | CASE_FLT_FN (BUILT_IN_COS): | |
6b43bae4 | 2143 | builtin_optab = sincos_optab; break; |
2144 | default: | |
64db345d | 2145 | gcc_unreachable (); |
6b43bae4 | 2146 | } |
2147 | ||
2148 | /* Make a suitable register to place result in. */ | |
2149 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
2150 | ||
6b43bae4 | 2151 | /* Check if sincos insn is available, otherwise fallback |
0bed3869 | 2152 | to sin or cos insn. */ |
d6bf3b14 | 2153 | if (optab_handler (builtin_optab, mode) == CODE_FOR_nothing) |
6b43bae4 | 2154 | switch (DECL_FUNCTION_CODE (fndecl)) |
2155 | { | |
4f35b1fc | 2156 | CASE_FLT_FN (BUILT_IN_SIN): |
6b43bae4 | 2157 | builtin_optab = sin_optab; break; |
4f35b1fc | 2158 | CASE_FLT_FN (BUILT_IN_COS): |
6b43bae4 | 2159 | builtin_optab = cos_optab; break; |
2160 | default: | |
64db345d | 2161 | gcc_unreachable (); |
6b43bae4 | 2162 | } |
6b43bae4 | 2163 | |
2164 | /* Before working hard, check whether the instruction is available. */ | |
d6bf3b14 | 2165 | if (optab_handler (builtin_optab, mode) != CODE_FOR_nothing) |
6b43bae4 | 2166 | { |
de2e453e | 2167 | rtx result = gen_reg_rtx (mode); |
6b43bae4 | 2168 | |
2169 | /* Wrap the computation of the argument in a SAVE_EXPR, as we may | |
2170 | need to expand the argument again. This way, we will not perform | |
2171 | side-effects more the once. */ | |
abfea505 | 2172 | CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg); |
6b43bae4 | 2173 | |
1db6d067 | 2174 | op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL); |
6b43bae4 | 2175 | |
6b43bae4 | 2176 | start_sequence (); |
2177 | ||
de2e453e | 2178 | /* Compute into RESULT. |
2179 | Set RESULT to wherever the result comes back. */ | |
6b43bae4 | 2180 | if (builtin_optab == sincos_optab) |
2181 | { | |
de2e453e | 2182 | int ok; |
7d3f6cc7 | 2183 | |
6b43bae4 | 2184 | switch (DECL_FUNCTION_CODE (fndecl)) |
2185 | { | |
4f35b1fc | 2186 | CASE_FLT_FN (BUILT_IN_SIN): |
de2e453e | 2187 | ok = expand_twoval_unop (builtin_optab, op0, 0, result, 0); |
6b43bae4 | 2188 | break; |
4f35b1fc | 2189 | CASE_FLT_FN (BUILT_IN_COS): |
de2e453e | 2190 | ok = expand_twoval_unop (builtin_optab, op0, result, 0, 0); |
6b43bae4 | 2191 | break; |
2192 | default: | |
64db345d | 2193 | gcc_unreachable (); |
6b43bae4 | 2194 | } |
de2e453e | 2195 | gcc_assert (ok); |
6b43bae4 | 2196 | } |
2197 | else | |
de2e453e | 2198 | result = expand_unop (mode, builtin_optab, op0, result, 0); |
6b43bae4 | 2199 | |
de2e453e | 2200 | if (result != 0) |
6b43bae4 | 2201 | { |
6b43bae4 | 2202 | /* Output the entire sequence. */ |
2203 | insns = get_insns (); | |
2204 | end_sequence (); | |
2205 | emit_insn (insns); | |
de2e453e | 2206 | return result; |
6b43bae4 | 2207 | } |
2208 | ||
2209 | /* If we were unable to expand via the builtin, stop the sequence | |
2210 | (without outputting the insns) and call to the library function | |
2211 | with the stabilized argument list. */ | |
2212 | end_sequence (); | |
2213 | } | |
2214 | ||
de2e453e | 2215 | return expand_call (exp, target, target == const0_rtx); |
6b43bae4 | 2216 | } |
2217 | ||
a65c4d64 | 2218 | /* Given an interclass math builtin decl FNDECL and it's argument ARG |
2219 | return an RTL instruction code that implements the functionality. | |
2220 | If that isn't possible or available return CODE_FOR_nothing. */ | |
a67a90e5 | 2221 | |
a65c4d64 | 2222 | static enum insn_code |
2223 | interclass_mathfn_icode (tree arg, tree fndecl) | |
a67a90e5 | 2224 | { |
a65c4d64 | 2225 | bool errno_set = false; |
6cdd383a | 2226 | optab builtin_optab = unknown_optab; |
3754d046 | 2227 | machine_mode mode; |
a67a90e5 | 2228 | |
2229 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2230 | { | |
2231 | CASE_FLT_FN (BUILT_IN_ILOGB): | |
12f08300 | 2232 | errno_set = true; builtin_optab = ilogb_optab; break; |
2233 | CASE_FLT_FN (BUILT_IN_ISINF): | |
2234 | builtin_optab = isinf_optab; break; | |
2235 | case BUILT_IN_ISNORMAL: | |
2236 | case BUILT_IN_ISFINITE: | |
2237 | CASE_FLT_FN (BUILT_IN_FINITE): | |
2238 | case BUILT_IN_FINITED32: | |
2239 | case BUILT_IN_FINITED64: | |
2240 | case BUILT_IN_FINITED128: | |
2241 | case BUILT_IN_ISINFD32: | |
2242 | case BUILT_IN_ISINFD64: | |
2243 | case BUILT_IN_ISINFD128: | |
2244 | /* These builtins have no optabs (yet). */ | |
cde061c1 | 2245 | break; |
a67a90e5 | 2246 | default: |
2247 | gcc_unreachable (); | |
2248 | } | |
2249 | ||
2250 | /* There's no easy way to detect the case we need to set EDOM. */ | |
2251 | if (flag_errno_math && errno_set) | |
a65c4d64 | 2252 | return CODE_FOR_nothing; |
a67a90e5 | 2253 | |
2254 | /* Optab mode depends on the mode of the input argument. */ | |
2255 | mode = TYPE_MODE (TREE_TYPE (arg)); | |
2256 | ||
cde061c1 | 2257 | if (builtin_optab) |
d6bf3b14 | 2258 | return optab_handler (builtin_optab, mode); |
a65c4d64 | 2259 | return CODE_FOR_nothing; |
2260 | } | |
2261 | ||
2262 | /* Expand a call to one of the builtin math functions that operate on | |
12f08300 | 2263 | floating point argument and output an integer result (ilogb, isinf, |
2264 | isnan, etc). | |
a65c4d64 | 2265 | Return 0 if a normal call should be emitted rather than expanding the |
2266 | function in-line. EXP is the expression that is a call to the builtin | |
f97eea22 | 2267 | function; if convenient, the result should be placed in TARGET. */ |
a65c4d64 | 2268 | |
2269 | static rtx | |
f97eea22 | 2270 | expand_builtin_interclass_mathfn (tree exp, rtx target) |
a65c4d64 | 2271 | { |
2272 | enum insn_code icode = CODE_FOR_nothing; | |
2273 | rtx op0; | |
2274 | tree fndecl = get_callee_fndecl (exp); | |
3754d046 | 2275 | machine_mode mode; |
a65c4d64 | 2276 | tree arg; |
2277 | ||
2278 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) | |
2279 | return NULL_RTX; | |
2280 | ||
2281 | arg = CALL_EXPR_ARG (exp, 0); | |
2282 | icode = interclass_mathfn_icode (arg, fndecl); | |
2283 | mode = TYPE_MODE (TREE_TYPE (arg)); | |
2284 | ||
a67a90e5 | 2285 | if (icode != CODE_FOR_nothing) |
2286 | { | |
8786db1e | 2287 | struct expand_operand ops[1]; |
1e0c0b35 | 2288 | rtx_insn *last = get_last_insn (); |
4e2a2fb4 | 2289 | tree orig_arg = arg; |
a67a90e5 | 2290 | |
2291 | /* Wrap the computation of the argument in a SAVE_EXPR, as we may | |
2292 | need to expand the argument again. This way, we will not perform | |
2293 | side-effects more the once. */ | |
abfea505 | 2294 | CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg); |
a67a90e5 | 2295 | |
f97eea22 | 2296 | op0 = expand_expr (arg, NULL_RTX, VOIDmode, EXPAND_NORMAL); |
a67a90e5 | 2297 | |
2298 | if (mode != GET_MODE (op0)) | |
2299 | op0 = convert_to_mode (mode, op0, 0); | |
2300 | ||
8786db1e | 2301 | create_output_operand (&ops[0], target, TYPE_MODE (TREE_TYPE (exp))); |
2302 | if (maybe_legitimize_operands (icode, 0, 1, ops) | |
2303 | && maybe_emit_unop_insn (icode, ops[0].value, op0, UNKNOWN)) | |
2304 | return ops[0].value; | |
2305 | ||
4e2a2fb4 | 2306 | delete_insns_since (last); |
2307 | CALL_EXPR_ARG (exp, 0) = orig_arg; | |
a67a90e5 | 2308 | } |
2309 | ||
a65c4d64 | 2310 | return NULL_RTX; |
a67a90e5 | 2311 | } |
2312 | ||
c3147c1a | 2313 | /* Expand a call to the builtin sincos math function. |
c2f47e15 | 2314 | Return NULL_RTX if a normal call should be emitted rather than expanding the |
c3147c1a | 2315 | function in-line. EXP is the expression that is a call to the builtin |
2316 | function. */ | |
2317 | ||
2318 | static rtx | |
2319 | expand_builtin_sincos (tree exp) | |
2320 | { | |
2321 | rtx op0, op1, op2, target1, target2; | |
3754d046 | 2322 | machine_mode mode; |
c3147c1a | 2323 | tree arg, sinp, cosp; |
2324 | int result; | |
389dd41b | 2325 | location_t loc = EXPR_LOCATION (exp); |
be5575b2 | 2326 | tree alias_type, alias_off; |
c3147c1a | 2327 | |
c2f47e15 | 2328 | if (!validate_arglist (exp, REAL_TYPE, |
2329 | POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) | |
2330 | return NULL_RTX; | |
c3147c1a | 2331 | |
c2f47e15 | 2332 | arg = CALL_EXPR_ARG (exp, 0); |
2333 | sinp = CALL_EXPR_ARG (exp, 1); | |
2334 | cosp = CALL_EXPR_ARG (exp, 2); | |
c3147c1a | 2335 | |
2336 | /* Make a suitable register to place result in. */ | |
2337 | mode = TYPE_MODE (TREE_TYPE (arg)); | |
2338 | ||
2339 | /* Check if sincos insn is available, otherwise emit the call. */ | |
d6bf3b14 | 2340 | if (optab_handler (sincos_optab, mode) == CODE_FOR_nothing) |
c3147c1a | 2341 | return NULL_RTX; |
2342 | ||
2343 | target1 = gen_reg_rtx (mode); | |
2344 | target2 = gen_reg_rtx (mode); | |
2345 | ||
8ec3c5c2 | 2346 | op0 = expand_normal (arg); |
be5575b2 | 2347 | alias_type = build_pointer_type_for_mode (TREE_TYPE (arg), ptr_mode, true); |
2348 | alias_off = build_int_cst (alias_type, 0); | |
2349 | op1 = expand_normal (fold_build2_loc (loc, MEM_REF, TREE_TYPE (arg), | |
2350 | sinp, alias_off)); | |
2351 | op2 = expand_normal (fold_build2_loc (loc, MEM_REF, TREE_TYPE (arg), | |
2352 | cosp, alias_off)); | |
c3147c1a | 2353 | |
2354 | /* Compute into target1 and target2. | |
2355 | Set TARGET to wherever the result comes back. */ | |
2356 | result = expand_twoval_unop (sincos_optab, op0, target2, target1, 0); | |
2357 | gcc_assert (result); | |
2358 | ||
2359 | /* Move target1 and target2 to the memory locations indicated | |
2360 | by op1 and op2. */ | |
2361 | emit_move_insn (op1, target1); | |
2362 | emit_move_insn (op2, target2); | |
2363 | ||
2364 | return const0_rtx; | |
2365 | } | |
2366 | ||
d735c391 | 2367 | /* Expand a call to the internal cexpi builtin to the sincos math function. |
2368 | EXP is the expression that is a call to the builtin function; if convenient, | |
f97eea22 | 2369 | the result should be placed in TARGET. */ |
d735c391 | 2370 | |
2371 | static rtx | |
f97eea22 | 2372 | expand_builtin_cexpi (tree exp, rtx target) |
d735c391 | 2373 | { |
2374 | tree fndecl = get_callee_fndecl (exp); | |
d735c391 | 2375 | tree arg, type; |
3754d046 | 2376 | machine_mode mode; |
d735c391 | 2377 | rtx op0, op1, op2; |
389dd41b | 2378 | location_t loc = EXPR_LOCATION (exp); |
d735c391 | 2379 | |
c2f47e15 | 2380 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
2381 | return NULL_RTX; | |
d735c391 | 2382 | |
c2f47e15 | 2383 | arg = CALL_EXPR_ARG (exp, 0); |
d735c391 | 2384 | type = TREE_TYPE (arg); |
2385 | mode = TYPE_MODE (TREE_TYPE (arg)); | |
2386 | ||
2387 | /* Try expanding via a sincos optab, fall back to emitting a libcall | |
18b8d8ae | 2388 | to sincos or cexp. We are sure we have sincos or cexp because cexpi |
2389 | is only generated from sincos, cexp or if we have either of them. */ | |
d6bf3b14 | 2390 | if (optab_handler (sincos_optab, mode) != CODE_FOR_nothing) |
d735c391 | 2391 | { |
2392 | op1 = gen_reg_rtx (mode); | |
2393 | op2 = gen_reg_rtx (mode); | |
2394 | ||
f97eea22 | 2395 | op0 = expand_expr (arg, NULL_RTX, VOIDmode, EXPAND_NORMAL); |
d735c391 | 2396 | |
2397 | /* Compute into op1 and op2. */ | |
2398 | expand_twoval_unop (sincos_optab, op0, op2, op1, 0); | |
2399 | } | |
30f690e0 | 2400 | else if (targetm.libc_has_function (function_sincos)) |
d735c391 | 2401 | { |
c2f47e15 | 2402 | tree call, fn = NULL_TREE; |
d735c391 | 2403 | tree top1, top2; |
2404 | rtx op1a, op2a; | |
2405 | ||
2406 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF) | |
b9a16870 | 2407 | fn = builtin_decl_explicit (BUILT_IN_SINCOSF); |
d735c391 | 2408 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI) |
b9a16870 | 2409 | fn = builtin_decl_explicit (BUILT_IN_SINCOS); |
d735c391 | 2410 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL) |
b9a16870 | 2411 | fn = builtin_decl_explicit (BUILT_IN_SINCOSL); |
c2f47e15 | 2412 | else |
2413 | gcc_unreachable (); | |
48e1416a | 2414 | |
0ab48139 | 2415 | op1 = assign_temp (TREE_TYPE (arg), 1, 1); |
2416 | op2 = assign_temp (TREE_TYPE (arg), 1, 1); | |
99182918 | 2417 | op1a = copy_addr_to_reg (XEXP (op1, 0)); |
2418 | op2a = copy_addr_to_reg (XEXP (op2, 0)); | |
d735c391 | 2419 | top1 = make_tree (build_pointer_type (TREE_TYPE (arg)), op1a); |
2420 | top2 = make_tree (build_pointer_type (TREE_TYPE (arg)), op2a); | |
2421 | ||
d735c391 | 2422 | /* Make sure not to fold the sincos call again. */ |
2423 | call = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn); | |
c2f47e15 | 2424 | expand_normal (build_call_nary (TREE_TYPE (TREE_TYPE (fn)), |
2425 | call, 3, arg, top1, top2)); | |
d735c391 | 2426 | } |
18b8d8ae | 2427 | else |
2428 | { | |
0ecbc158 | 2429 | tree call, fn = NULL_TREE, narg; |
18b8d8ae | 2430 | tree ctype = build_complex_type (type); |
2431 | ||
0ecbc158 | 2432 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF) |
b9a16870 | 2433 | fn = builtin_decl_explicit (BUILT_IN_CEXPF); |
0ecbc158 | 2434 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI) |
b9a16870 | 2435 | fn = builtin_decl_explicit (BUILT_IN_CEXP); |
0ecbc158 | 2436 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL) |
b9a16870 | 2437 | fn = builtin_decl_explicit (BUILT_IN_CEXPL); |
c2f47e15 | 2438 | else |
2439 | gcc_unreachable (); | |
fc0dfa6e | 2440 | |
2441 | /* If we don't have a decl for cexp create one. This is the | |
2442 | friendliest fallback if the user calls __builtin_cexpi | |
2443 | without full target C99 function support. */ | |
2444 | if (fn == NULL_TREE) | |
2445 | { | |
2446 | tree fntype; | |
2447 | const char *name = NULL; | |
2448 | ||
2449 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF) | |
2450 | name = "cexpf"; | |
2451 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI) | |
2452 | name = "cexp"; | |
2453 | else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL) | |
2454 | name = "cexpl"; | |
2455 | ||
2456 | fntype = build_function_type_list (ctype, ctype, NULL_TREE); | |
2457 | fn = build_fn_decl (name, fntype); | |
2458 | } | |
2459 | ||
389dd41b | 2460 | narg = fold_build2_loc (loc, COMPLEX_EXPR, ctype, |
18b8d8ae | 2461 | build_real (type, dconst0), arg); |
2462 | ||
2463 | /* Make sure not to fold the cexp call again. */ | |
2464 | call = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn); | |
48e1416a | 2465 | return expand_expr (build_call_nary (ctype, call, 1, narg), |
1db6d067 | 2466 | target, VOIDmode, EXPAND_NORMAL); |
18b8d8ae | 2467 | } |
d735c391 | 2468 | |
2469 | /* Now build the proper return type. */ | |
2470 | return expand_expr (build2 (COMPLEX_EXPR, build_complex_type (type), | |
2471 | make_tree (TREE_TYPE (arg), op2), | |
2472 | make_tree (TREE_TYPE (arg), op1)), | |
1db6d067 | 2473 | target, VOIDmode, EXPAND_NORMAL); |
d735c391 | 2474 | } |
2475 | ||
a65c4d64 | 2476 | /* Conveniently construct a function call expression. FNDECL names the |
2477 | function to be called, N is the number of arguments, and the "..." | |
2478 | parameters are the argument expressions. Unlike build_call_exr | |
2479 | this doesn't fold the call, hence it will always return a CALL_EXPR. */ | |
2480 | ||
2481 | static tree | |
2482 | build_call_nofold_loc (location_t loc, tree fndecl, int n, ...) | |
2483 | { | |
2484 | va_list ap; | |
2485 | tree fntype = TREE_TYPE (fndecl); | |
2486 | tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl); | |
2487 | ||
2488 | va_start (ap, n); | |
2489 | fn = build_call_valist (TREE_TYPE (fntype), fn, n, ap); | |
2490 | va_end (ap); | |
2491 | SET_EXPR_LOCATION (fn, loc); | |
2492 | return fn; | |
2493 | } | |
a65c4d64 | 2494 | |
7d3afc77 | 2495 | /* Expand a call to one of the builtin rounding functions gcc defines |
2496 | as an extension (lfloor and lceil). As these are gcc extensions we | |
2497 | do not need to worry about setting errno to EDOM. | |
ad52b9b7 | 2498 | If expanding via optab fails, lower expression to (int)(floor(x)). |
2499 | EXP is the expression that is a call to the builtin function; | |
ff1b14e4 | 2500 | if convenient, the result should be placed in TARGET. */ |
ad52b9b7 | 2501 | |
2502 | static rtx | |
ff1b14e4 | 2503 | expand_builtin_int_roundingfn (tree exp, rtx target) |
ad52b9b7 | 2504 | { |
9c42dd28 | 2505 | convert_optab builtin_optab; |
1e0c0b35 | 2506 | rtx op0, tmp; |
2507 | rtx_insn *insns; | |
ad52b9b7 | 2508 | tree fndecl = get_callee_fndecl (exp); |
ad52b9b7 | 2509 | enum built_in_function fallback_fn; |
2510 | tree fallback_fndecl; | |
3754d046 | 2511 | machine_mode mode; |
4de0924f | 2512 | tree arg; |
ad52b9b7 | 2513 | |
c2f47e15 | 2514 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
ad52b9b7 | 2515 | gcc_unreachable (); |
2516 | ||
c2f47e15 | 2517 | arg = CALL_EXPR_ARG (exp, 0); |
ad52b9b7 | 2518 | |
2519 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2520 | { | |
80ff6494 | 2521 | CASE_FLT_FN (BUILT_IN_ICEIL): |
4f35b1fc | 2522 | CASE_FLT_FN (BUILT_IN_LCEIL): |
2523 | CASE_FLT_FN (BUILT_IN_LLCEIL): | |
ac148751 | 2524 | builtin_optab = lceil_optab; |
2525 | fallback_fn = BUILT_IN_CEIL; | |
2526 | break; | |
2527 | ||
80ff6494 | 2528 | CASE_FLT_FN (BUILT_IN_IFLOOR): |
4f35b1fc | 2529 | CASE_FLT_FN (BUILT_IN_LFLOOR): |
2530 | CASE_FLT_FN (BUILT_IN_LLFLOOR): | |
ad52b9b7 | 2531 | builtin_optab = lfloor_optab; |
2532 | fallback_fn = BUILT_IN_FLOOR; | |
2533 | break; | |
2534 | ||
2535 | default: | |
2536 | gcc_unreachable (); | |
2537 | } | |
2538 | ||
2539 | /* Make a suitable register to place result in. */ | |
2540 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
2541 | ||
9c42dd28 | 2542 | target = gen_reg_rtx (mode); |
ad52b9b7 | 2543 | |
9c42dd28 | 2544 | /* Wrap the computation of the argument in a SAVE_EXPR, as we may |
2545 | need to expand the argument again. This way, we will not perform | |
2546 | side-effects more the once. */ | |
abfea505 | 2547 | CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg); |
ad52b9b7 | 2548 | |
ff1b14e4 | 2549 | op0 = expand_expr (arg, NULL, VOIDmode, EXPAND_NORMAL); |
ad52b9b7 | 2550 | |
9c42dd28 | 2551 | start_sequence (); |
ad52b9b7 | 2552 | |
9c42dd28 | 2553 | /* Compute into TARGET. */ |
2554 | if (expand_sfix_optab (target, op0, builtin_optab)) | |
2555 | { | |
2556 | /* Output the entire sequence. */ | |
2557 | insns = get_insns (); | |
ad52b9b7 | 2558 | end_sequence (); |
9c42dd28 | 2559 | emit_insn (insns); |
2560 | return target; | |
ad52b9b7 | 2561 | } |
2562 | ||
9c42dd28 | 2563 | /* If we were unable to expand via the builtin, stop the sequence |
2564 | (without outputting the insns). */ | |
2565 | end_sequence (); | |
2566 | ||
ad52b9b7 | 2567 | /* Fall back to floating point rounding optab. */ |
2568 | fallback_fndecl = mathfn_built_in (TREE_TYPE (arg), fallback_fn); | |
fc0dfa6e | 2569 | |
2570 | /* For non-C99 targets we may end up without a fallback fndecl here | |
2571 | if the user called __builtin_lfloor directly. In this case emit | |
2572 | a call to the floor/ceil variants nevertheless. This should result | |
2573 | in the best user experience for not full C99 targets. */ | |
2574 | if (fallback_fndecl == NULL_TREE) | |
2575 | { | |
2576 | tree fntype; | |
2577 | const char *name = NULL; | |
2578 | ||
2579 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2580 | { | |
80ff6494 | 2581 | case BUILT_IN_ICEIL: |
fc0dfa6e | 2582 | case BUILT_IN_LCEIL: |
2583 | case BUILT_IN_LLCEIL: | |
2584 | name = "ceil"; | |
2585 | break; | |
80ff6494 | 2586 | case BUILT_IN_ICEILF: |
fc0dfa6e | 2587 | case BUILT_IN_LCEILF: |
2588 | case BUILT_IN_LLCEILF: | |
2589 | name = "ceilf"; | |
2590 | break; | |
80ff6494 | 2591 | case BUILT_IN_ICEILL: |
fc0dfa6e | 2592 | case BUILT_IN_LCEILL: |
2593 | case BUILT_IN_LLCEILL: | |
2594 | name = "ceill"; | |
2595 | break; | |
80ff6494 | 2596 | case BUILT_IN_IFLOOR: |
fc0dfa6e | 2597 | case BUILT_IN_LFLOOR: |
2598 | case BUILT_IN_LLFLOOR: | |
2599 | name = "floor"; | |
2600 | break; | |
80ff6494 | 2601 | case BUILT_IN_IFLOORF: |
fc0dfa6e | 2602 | case BUILT_IN_LFLOORF: |
2603 | case BUILT_IN_LLFLOORF: | |
2604 | name = "floorf"; | |
2605 | break; | |
80ff6494 | 2606 | case BUILT_IN_IFLOORL: |
fc0dfa6e | 2607 | case BUILT_IN_LFLOORL: |
2608 | case BUILT_IN_LLFLOORL: | |
2609 | name = "floorl"; | |
2610 | break; | |
2611 | default: | |
2612 | gcc_unreachable (); | |
2613 | } | |
2614 | ||
2615 | fntype = build_function_type_list (TREE_TYPE (arg), | |
2616 | TREE_TYPE (arg), NULL_TREE); | |
2617 | fallback_fndecl = build_fn_decl (name, fntype); | |
2618 | } | |
2619 | ||
0568e9c1 | 2620 | exp = build_call_nofold_loc (EXPR_LOCATION (exp), fallback_fndecl, 1, arg); |
ad52b9b7 | 2621 | |
d4c690af | 2622 | tmp = expand_normal (exp); |
933eb13a | 2623 | tmp = maybe_emit_group_store (tmp, TREE_TYPE (exp)); |
ad52b9b7 | 2624 | |
2625 | /* Truncate the result of floating point optab to integer | |
2626 | via expand_fix (). */ | |
2627 | target = gen_reg_rtx (mode); | |
2628 | expand_fix (target, tmp, 0); | |
2629 | ||
2630 | return target; | |
2631 | } | |
2632 | ||
7d3afc77 | 2633 | /* Expand a call to one of the builtin math functions doing integer |
2634 | conversion (lrint). | |
2635 | Return 0 if a normal call should be emitted rather than expanding the | |
2636 | function in-line. EXP is the expression that is a call to the builtin | |
ff1b14e4 | 2637 | function; if convenient, the result should be placed in TARGET. */ |
7d3afc77 | 2638 | |
2639 | static rtx | |
ff1b14e4 | 2640 | expand_builtin_int_roundingfn_2 (tree exp, rtx target) |
7d3afc77 | 2641 | { |
5f51ee59 | 2642 | convert_optab builtin_optab; |
1e0c0b35 | 2643 | rtx op0; |
2644 | rtx_insn *insns; | |
7d3afc77 | 2645 | tree fndecl = get_callee_fndecl (exp); |
4de0924f | 2646 | tree arg; |
3754d046 | 2647 | machine_mode mode; |
e951f9a4 | 2648 | enum built_in_function fallback_fn = BUILT_IN_NONE; |
7d3afc77 | 2649 | |
c2f47e15 | 2650 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
2651 | gcc_unreachable (); | |
48e1416a | 2652 | |
c2f47e15 | 2653 | arg = CALL_EXPR_ARG (exp, 0); |
7d3afc77 | 2654 | |
2655 | switch (DECL_FUNCTION_CODE (fndecl)) | |
2656 | { | |
80ff6494 | 2657 | CASE_FLT_FN (BUILT_IN_IRINT): |
e951f9a4 | 2658 | fallback_fn = BUILT_IN_LRINT; |
3c77f69c | 2659 | gcc_fallthrough (); |
7d3afc77 | 2660 | CASE_FLT_FN (BUILT_IN_LRINT): |
2661 | CASE_FLT_FN (BUILT_IN_LLRINT): | |
e951f9a4 | 2662 | builtin_optab = lrint_optab; |
2663 | break; | |
80ff6494 | 2664 | |
2665 | CASE_FLT_FN (BUILT_IN_IROUND): | |
e951f9a4 | 2666 | fallback_fn = BUILT_IN_LROUND; |
3c77f69c | 2667 | gcc_fallthrough (); |
ef2f1a10 | 2668 | CASE_FLT_FN (BUILT_IN_LROUND): |
2669 | CASE_FLT_FN (BUILT_IN_LLROUND): | |
e951f9a4 | 2670 | builtin_optab = lround_optab; |
2671 | break; | |
80ff6494 | 2672 | |
7d3afc77 | 2673 | default: |
2674 | gcc_unreachable (); | |
2675 | } | |
2676 | ||
e951f9a4 | 2677 | /* There's no easy way to detect the case we need to set EDOM. */ |
2678 | if (flag_errno_math && fallback_fn == BUILT_IN_NONE) | |
2679 | return NULL_RTX; | |
2680 | ||
7d3afc77 | 2681 | /* Make a suitable register to place result in. */ |
2682 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
2683 | ||
e951f9a4 | 2684 | /* There's no easy way to detect the case we need to set EDOM. */ |
2685 | if (!flag_errno_math) | |
2686 | { | |
de2e453e | 2687 | rtx result = gen_reg_rtx (mode); |
7d3afc77 | 2688 | |
e951f9a4 | 2689 | /* Wrap the computation of the argument in a SAVE_EXPR, as we may |
2690 | need to expand the argument again. This way, we will not perform | |
2691 | side-effects more the once. */ | |
2692 | CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg); | |
7d3afc77 | 2693 | |
e951f9a4 | 2694 | op0 = expand_expr (arg, NULL, VOIDmode, EXPAND_NORMAL); |
7d3afc77 | 2695 | |
e951f9a4 | 2696 | start_sequence (); |
7d3afc77 | 2697 | |
de2e453e | 2698 | if (expand_sfix_optab (result, op0, builtin_optab)) |
e951f9a4 | 2699 | { |
2700 | /* Output the entire sequence. */ | |
2701 | insns = get_insns (); | |
2702 | end_sequence (); | |
2703 | emit_insn (insns); | |
de2e453e | 2704 | return result; |
e951f9a4 | 2705 | } |
2706 | ||
2707 | /* If we were unable to expand via the builtin, stop the sequence | |
2708 | (without outputting the insns) and call to the library function | |
2709 | with the stabilized argument list. */ | |
7d3afc77 | 2710 | end_sequence (); |
2711 | } | |
2712 | ||
e951f9a4 | 2713 | if (fallback_fn != BUILT_IN_NONE) |
2714 | { | |
2715 | /* Fall back to rounding to long int. Use implicit_p 0 - for non-C99 | |
2716 | targets, (int) round (x) should never be transformed into | |
2717 | BUILT_IN_IROUND and if __builtin_iround is called directly, emit | |
2718 | a call to lround in the hope that the target provides at least some | |
2719 | C99 functions. This should result in the best user experience for | |
2720 | not full C99 targets. */ | |
e3240774 | 2721 | tree fallback_fndecl = mathfn_built_in_1 |
2722 | (TREE_TYPE (arg), as_combined_fn (fallback_fn), 0); | |
e951f9a4 | 2723 | |
2724 | exp = build_call_nofold_loc (EXPR_LOCATION (exp), | |
2725 | fallback_fndecl, 1, arg); | |
2726 | ||
2727 | target = expand_call (exp, NULL_RTX, target == const0_rtx); | |
933eb13a | 2728 | target = maybe_emit_group_store (target, TREE_TYPE (exp)); |
e951f9a4 | 2729 | return convert_to_mode (mode, target, 0); |
2730 | } | |
5f51ee59 | 2731 | |
de2e453e | 2732 | return expand_call (exp, target, target == const0_rtx); |
7d3afc77 | 2733 | } |
2734 | ||
c2f47e15 | 2735 | /* Expand a call to the powi built-in mathematical function. Return NULL_RTX if |
757c219d | 2736 | a normal call should be emitted rather than expanding the function |
2737 | in-line. EXP is the expression that is a call to the builtin | |
2738 | function; if convenient, the result should be placed in TARGET. */ | |
2739 | ||
2740 | static rtx | |
f97eea22 | 2741 | expand_builtin_powi (tree exp, rtx target) |
757c219d | 2742 | { |
757c219d | 2743 | tree arg0, arg1; |
2744 | rtx op0, op1; | |
3754d046 | 2745 | machine_mode mode; |
2746 | machine_mode mode2; | |
757c219d | 2747 | |
c2f47e15 | 2748 | if (! validate_arglist (exp, REAL_TYPE, INTEGER_TYPE, VOID_TYPE)) |
2749 | return NULL_RTX; | |
757c219d | 2750 | |
c2f47e15 | 2751 | arg0 = CALL_EXPR_ARG (exp, 0); |
2752 | arg1 = CALL_EXPR_ARG (exp, 1); | |
757c219d | 2753 | mode = TYPE_MODE (TREE_TYPE (exp)); |
2754 | ||
757c219d | 2755 | /* Emit a libcall to libgcc. */ |
2756 | ||
c2f47e15 | 2757 | /* Mode of the 2nd argument must match that of an int. */ |
d0405f40 | 2758 | mode2 = mode_for_size (INT_TYPE_SIZE, MODE_INT, 0); |
2759 | ||
757c219d | 2760 | if (target == NULL_RTX) |
2761 | target = gen_reg_rtx (mode); | |
2762 | ||
f97eea22 | 2763 | op0 = expand_expr (arg0, NULL_RTX, mode, EXPAND_NORMAL); |
757c219d | 2764 | if (GET_MODE (op0) != mode) |
2765 | op0 = convert_to_mode (mode, op0, 0); | |
1db6d067 | 2766 | op1 = expand_expr (arg1, NULL_RTX, mode2, EXPAND_NORMAL); |
d0405f40 | 2767 | if (GET_MODE (op1) != mode2) |
2768 | op1 = convert_to_mode (mode2, op1, 0); | |
757c219d | 2769 | |
f36b9f69 | 2770 | target = emit_library_call_value (optab_libfunc (powi_optab, mode), |
2dd6f9ed | 2771 | target, LCT_CONST, mode, 2, |
d0405f40 | 2772 | op0, mode, op1, mode2); |
757c219d | 2773 | |
2774 | return target; | |
2775 | } | |
2776 | ||
48e1416a | 2777 | /* Expand expression EXP which is a call to the strlen builtin. Return |
c2f47e15 | 2778 | NULL_RTX if we failed the caller should emit a normal call, otherwise |
aed0bd19 | 2779 | try to get the result in TARGET, if convenient. */ |
f7c44134 | 2780 | |
53800dbe | 2781 | static rtx |
c2f47e15 | 2782 | expand_builtin_strlen (tree exp, rtx target, |
3754d046 | 2783 | machine_mode target_mode) |
53800dbe | 2784 | { |
c2f47e15 | 2785 | if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) |
2786 | return NULL_RTX; | |
53800dbe | 2787 | else |
2788 | { | |
8786db1e | 2789 | struct expand_operand ops[4]; |
911c0150 | 2790 | rtx pat; |
c2f47e15 | 2791 | tree len; |
2792 | tree src = CALL_EXPR_ARG (exp, 0); | |
1e0c0b35 | 2793 | rtx src_reg; |
2794 | rtx_insn *before_strlen; | |
19a4dce4 | 2795 | machine_mode insn_mode; |
ef2c4a29 | 2796 | enum insn_code icode = CODE_FOR_nothing; |
153c3b50 | 2797 | unsigned int align; |
6248e345 | 2798 | |
2799 | /* If the length can be computed at compile-time, return it. */ | |
681fab1e | 2800 | len = c_strlen (src, 0); |
6248e345 | 2801 | if (len) |
80cd7a5e | 2802 | return expand_expr (len, target, target_mode, EXPAND_NORMAL); |
6248e345 | 2803 | |
681fab1e | 2804 | /* If the length can be computed at compile-time and is constant |
2805 | integer, but there are side-effects in src, evaluate | |
2806 | src for side-effects, then return len. | |
2807 | E.g. x = strlen (i++ ? "xfoo" + 1 : "bar"); | |
2808 | can be optimized into: i++; x = 3; */ | |
2809 | len = c_strlen (src, 1); | |
2810 | if (len && TREE_CODE (len) == INTEGER_CST) | |
2811 | { | |
2812 | expand_expr (src, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2813 | return expand_expr (len, target, target_mode, EXPAND_NORMAL); | |
2814 | } | |
2815 | ||
957d0361 | 2816 | align = get_pointer_alignment (src) / BITS_PER_UNIT; |
53800dbe | 2817 | |
53800dbe | 2818 | /* If SRC is not a pointer type, don't do this operation inline. */ |
2819 | if (align == 0) | |
c2f47e15 | 2820 | return NULL_RTX; |
53800dbe | 2821 | |
911c0150 | 2822 | /* Bail out if we can't compute strlen in the right mode. */ |
19a4dce4 | 2823 | FOR_EACH_MODE_FROM (insn_mode, target_mode) |
53800dbe | 2824 | { |
d6bf3b14 | 2825 | icode = optab_handler (strlen_optab, insn_mode); |
53800dbe | 2826 | if (icode != CODE_FOR_nothing) |
c28ae87f | 2827 | break; |
53800dbe | 2828 | } |
2829 | if (insn_mode == VOIDmode) | |
c2f47e15 | 2830 | return NULL_RTX; |
53800dbe | 2831 | |
911c0150 | 2832 | /* Make a place to hold the source address. We will not expand |
2833 | the actual source until we are sure that the expansion will | |
2834 | not fail -- there are trees that cannot be expanded twice. */ | |
2835 | src_reg = gen_reg_rtx (Pmode); | |
53800dbe | 2836 | |
911c0150 | 2837 | /* Mark the beginning of the strlen sequence so we can emit the |
2838 | source operand later. */ | |
f0ce3b1f | 2839 | before_strlen = get_last_insn (); |
53800dbe | 2840 | |
8786db1e | 2841 | create_output_operand (&ops[0], target, insn_mode); |
2842 | create_fixed_operand (&ops[1], gen_rtx_MEM (BLKmode, src_reg)); | |
2843 | create_integer_operand (&ops[2], 0); | |
2844 | create_integer_operand (&ops[3], align); | |
2845 | if (!maybe_expand_insn (icode, 4, ops)) | |
c2f47e15 | 2846 | return NULL_RTX; |
911c0150 | 2847 | |
2848 | /* Now that we are assured of success, expand the source. */ | |
2849 | start_sequence (); | |
499eee58 | 2850 | pat = expand_expr (src, src_reg, Pmode, EXPAND_NORMAL); |
911c0150 | 2851 | if (pat != src_reg) |
499eee58 | 2852 | { |
2853 | #ifdef POINTERS_EXTEND_UNSIGNED | |
2854 | if (GET_MODE (pat) != Pmode) | |
2855 | pat = convert_to_mode (Pmode, pat, | |
2856 | POINTERS_EXTEND_UNSIGNED); | |
2857 | #endif | |
2858 | emit_move_insn (src_reg, pat); | |
2859 | } | |
31d3e01c | 2860 | pat = get_insns (); |
911c0150 | 2861 | end_sequence (); |
bceb0d1f | 2862 | |
2863 | if (before_strlen) | |
2864 | emit_insn_after (pat, before_strlen); | |
2865 | else | |
2866 | emit_insn_before (pat, get_insns ()); | |
53800dbe | 2867 | |
2868 | /* Return the value in the proper mode for this function. */ | |
8786db1e | 2869 | if (GET_MODE (ops[0].value) == target_mode) |
2870 | target = ops[0].value; | |
53800dbe | 2871 | else if (target != 0) |
8786db1e | 2872 | convert_move (target, ops[0].value, 0); |
53800dbe | 2873 | else |
8786db1e | 2874 | target = convert_to_mode (target_mode, ops[0].value, 0); |
911c0150 | 2875 | |
2876 | return target; | |
53800dbe | 2877 | } |
2878 | } | |
2879 | ||
6840589f | 2880 | /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE) |
2881 | bytes from constant string DATA + OFFSET and return it as target | |
2882 | constant. */ | |
2883 | ||
2884 | static rtx | |
aecda0d6 | 2885 | builtin_memcpy_read_str (void *data, HOST_WIDE_INT offset, |
3754d046 | 2886 | machine_mode mode) |
6840589f | 2887 | { |
2888 | const char *str = (const char *) data; | |
2889 | ||
64db345d | 2890 | gcc_assert (offset >= 0 |
2891 | && ((unsigned HOST_WIDE_INT) offset + GET_MODE_SIZE (mode) | |
2892 | <= strlen (str) + 1)); | |
6840589f | 2893 | |
2894 | return c_readstr (str + offset, mode); | |
2895 | } | |
2896 | ||
36d63243 | 2897 | /* LEN specify length of the block of memcpy/memset operation. |
9db0f34d | 2898 | Figure out its range and put it into MIN_SIZE/MAX_SIZE. |
2899 | In some cases we can make very likely guess on max size, then we | |
2900 | set it into PROBABLE_MAX_SIZE. */ | |
36d63243 | 2901 | |
2902 | static void | |
2903 | determine_block_size (tree len, rtx len_rtx, | |
2904 | unsigned HOST_WIDE_INT *min_size, | |
9db0f34d | 2905 | unsigned HOST_WIDE_INT *max_size, |
2906 | unsigned HOST_WIDE_INT *probable_max_size) | |
36d63243 | 2907 | { |
2908 | if (CONST_INT_P (len_rtx)) | |
2909 | { | |
4e140a5c | 2910 | *min_size = *max_size = *probable_max_size = UINTVAL (len_rtx); |
36d63243 | 2911 | return; |
2912 | } | |
2913 | else | |
2914 | { | |
9c1be15e | 2915 | wide_int min, max; |
9db0f34d | 2916 | enum value_range_type range_type = VR_UNDEFINED; |
2917 | ||
2918 | /* Determine bounds from the type. */ | |
2919 | if (tree_fits_uhwi_p (TYPE_MIN_VALUE (TREE_TYPE (len)))) | |
2920 | *min_size = tree_to_uhwi (TYPE_MIN_VALUE (TREE_TYPE (len))); | |
2921 | else | |
2922 | *min_size = 0; | |
2923 | if (tree_fits_uhwi_p (TYPE_MAX_VALUE (TREE_TYPE (len)))) | |
4e140a5c | 2924 | *probable_max_size = *max_size |
2925 | = tree_to_uhwi (TYPE_MAX_VALUE (TREE_TYPE (len))); | |
9db0f34d | 2926 | else |
2927 | *probable_max_size = *max_size = GET_MODE_MASK (GET_MODE (len_rtx)); | |
2928 | ||
2929 | if (TREE_CODE (len) == SSA_NAME) | |
2930 | range_type = get_range_info (len, &min, &max); | |
2931 | if (range_type == VR_RANGE) | |
36d63243 | 2932 | { |
fe5ad926 | 2933 | if (wi::fits_uhwi_p (min) && *min_size < min.to_uhwi ()) |
36d63243 | 2934 | *min_size = min.to_uhwi (); |
fe5ad926 | 2935 | if (wi::fits_uhwi_p (max) && *max_size > max.to_uhwi ()) |
9db0f34d | 2936 | *probable_max_size = *max_size = max.to_uhwi (); |
36d63243 | 2937 | } |
9db0f34d | 2938 | else if (range_type == VR_ANTI_RANGE) |
36d63243 | 2939 | { |
4a474a5a | 2940 | /* Anti range 0...N lets us to determine minimal size to N+1. */ |
fe5ad926 | 2941 | if (min == 0) |
9db0f34d | 2942 | { |
9c1be15e | 2943 | if (wi::fits_uhwi_p (max) && max.to_uhwi () + 1 != 0) |
2944 | *min_size = max.to_uhwi () + 1; | |
9db0f34d | 2945 | } |
2946 | /* Code like | |
2947 | ||
2948 | int n; | |
2949 | if (n < 100) | |
4a474a5a | 2950 | memcpy (a, b, n) |
9db0f34d | 2951 | |
2952 | Produce anti range allowing negative values of N. We still | |
2953 | can use the information and make a guess that N is not negative. | |
2954 | */ | |
fe5ad926 | 2955 | else if (!wi::leu_p (max, 1 << 30) && wi::fits_uhwi_p (min)) |
2956 | *probable_max_size = min.to_uhwi () - 1; | |
36d63243 | 2957 | } |
2958 | } | |
2959 | gcc_checking_assert (*max_size <= | |
2960 | (unsigned HOST_WIDE_INT) | |
2961 | GET_MODE_MASK (GET_MODE (len_rtx))); | |
2962 | } | |
2963 | ||
5aef8938 | 2964 | /* Try to verify that the sizes and lengths of the arguments to a string |
2965 | manipulation function given by EXP are within valid bounds and that | |
2966 | the operation does not lead to buffer overflow. Arguments other than | |
2967 | EXP may be null. When non-null, the arguments have the following | |
2968 | meaning: | |
2969 | SIZE is the user-supplied size argument to the function (such as in | |
2970 | memcpy(d, s, SIZE) or strncpy(d, s, SIZE). It specifies the exact | |
2971 | number of bytes to write. | |
2972 | MAXLEN is the user-supplied bound on the length of the source sequence | |
2973 | (such as in strncat(d, s, N). It specifies the upper limit on the number | |
2974 | of bytes to write. | |
ae33f654 | 2975 | SRC is the source string (such as in strcpy(d, s)) when the expression |
5aef8938 | 2976 | EXP is a string function call (as opposed to a memory call like memcpy). |
8d6c6ef5 | 2977 | As an exception, SRC can also be an integer denoting the precomputed |
2978 | size of the source string or object (for functions like memcpy). | |
5aef8938 | 2979 | OBJSIZE is the size of the destination object specified by the last |
2980 | argument to the _chk builtins, typically resulting from the expansion | |
2981 | of __builtin_object_size (such as in __builtin___strcpy_chk(d, s, | |
2982 | OBJSIZE). | |
2983 | ||
2984 | When SIZE is null LEN is checked to verify that it doesn't exceed | |
2985 | SIZE_MAX. | |
2986 | ||
2987 | If the call is successfully verified as safe from buffer overflow | |
2988 | the function returns true, otherwise false.. */ | |
2989 | ||
2990 | static bool | |
8d6c6ef5 | 2991 | check_sizes (int opt, tree exp, tree size, tree maxlen, tree src, tree objsize) |
5aef8938 | 2992 | { |
2993 | /* The size of the largest object is half the address space, or | |
2994 | SSIZE_MAX. (This is way too permissive.) */ | |
2995 | tree maxobjsize = TYPE_MAX_VALUE (ssizetype); | |
2996 | ||
2997 | tree slen = NULL_TREE; | |
2998 | ||
8d6c6ef5 | 2999 | tree range[2] = { NULL_TREE, NULL_TREE }; |
3000 | ||
5aef8938 | 3001 | /* Set to true when the exact number of bytes written by a string |
3002 | function like strcpy is not known and the only thing that is | |
3003 | known is that it must be at least one (for the terminating nul). */ | |
3004 | bool at_least_one = false; | |
8d6c6ef5 | 3005 | if (src) |
5aef8938 | 3006 | { |
8d6c6ef5 | 3007 | /* SRC is normally a pointer to string but as a special case |
5aef8938 | 3008 | it can be an integer denoting the length of a string. */ |
8d6c6ef5 | 3009 | if (POINTER_TYPE_P (TREE_TYPE (src))) |
5aef8938 | 3010 | { |
3011 | /* Try to determine the range of lengths the source string | |
8d6c6ef5 | 3012 | refers to. If it can be determined and is less than |
3013 | the upper bound given by MAXLEN add one to it for | |
5aef8938 | 3014 | the terminating nul. Otherwise, set it to one for |
8d6c6ef5 | 3015 | the same reason, or to MAXLEN as appropriate. */ |
3016 | get_range_strlen (src, range); | |
3017 | if (range[0] && (!maxlen || TREE_CODE (maxlen) == INTEGER_CST)) | |
3018 | { | |
3019 | if (maxlen && tree_int_cst_le (maxlen, range[0])) | |
3020 | range[0] = range[1] = maxlen; | |
3021 | else | |
3022 | range[0] = fold_build2 (PLUS_EXPR, size_type_node, | |
3023 | range[0], size_one_node); | |
3024 | ||
3025 | if (maxlen && tree_int_cst_le (maxlen, range[1])) | |
3026 | range[1] = maxlen; | |
3027 | else if (!integer_all_onesp (range[1])) | |
3028 | range[1] = fold_build2 (PLUS_EXPR, size_type_node, | |
3029 | range[1], size_one_node); | |
3030 | ||
3031 | slen = range[0]; | |
3032 | } | |
5aef8938 | 3033 | else |
3034 | { | |
3035 | at_least_one = true; | |
3036 | slen = size_one_node; | |
3037 | } | |
3038 | } | |
3039 | else | |
8d6c6ef5 | 3040 | slen = src; |
5aef8938 | 3041 | } |
3042 | ||
3043 | if (!size && !maxlen) | |
3044 | { | |
3045 | /* When the only available piece of data is the object size | |
3046 | there is nothing to do. */ | |
3047 | if (!slen) | |
3048 | return true; | |
3049 | ||
3050 | /* Otherwise, when the length of the source sequence is known | |
3051 | (as with with strlen), set SIZE to it. */ | |
8d6c6ef5 | 3052 | if (!range[0]) |
3053 | size = slen; | |
5aef8938 | 3054 | } |
3055 | ||
3056 | if (!objsize) | |
3057 | objsize = maxobjsize; | |
3058 | ||
3059 | /* The SIZE is exact if it's non-null, constant, and in range of | |
3060 | unsigned HOST_WIDE_INT. */ | |
3061 | bool exactsize = size && tree_fits_uhwi_p (size); | |
3062 | ||
5aef8938 | 3063 | if (size) |
3064 | get_size_range (size, range); | |
3065 | ||
3066 | /* First check the number of bytes to be written against the maximum | |
3067 | object size. */ | |
3068 | if (range[0] && tree_int_cst_lt (maxobjsize, range[0])) | |
3069 | { | |
3070 | location_t loc = tree_nonartificial_location (exp); | |
4d317237 | 3071 | loc = expansion_point_location_if_in_system_header (loc); |
5aef8938 | 3072 | |
3073 | if (range[0] == range[1]) | |
3074 | warning_at (loc, opt, | |
9098b938 | 3075 | "%K%qD specified size %E " |
8d6c6ef5 | 3076 | "exceeds maximum object size %E", |
3077 | exp, get_callee_fndecl (exp), range[0], maxobjsize); | |
5aef8938 | 3078 | else |
3079 | warning_at (loc, opt, | |
9098b938 | 3080 | "%K%qD specified size between %E and %E " |
8d6c6ef5 | 3081 | "exceeds maximum object size %E", |
5aef8938 | 3082 | exp, get_callee_fndecl (exp), |
8d6c6ef5 | 3083 | range[0], range[1], maxobjsize); |
5aef8938 | 3084 | return false; |
3085 | } | |
3086 | ||
3087 | /* Next check the number of bytes to be written against the destination | |
3088 | object size. */ | |
3089 | if (range[0] || !exactsize || integer_all_onesp (size)) | |
3090 | { | |
3091 | if (range[0] | |
3092 | && ((tree_fits_uhwi_p (objsize) | |
3093 | && tree_int_cst_lt (objsize, range[0])) | |
3094 | || (tree_fits_uhwi_p (size) | |
3095 | && tree_int_cst_lt (size, range[0])))) | |
3096 | { | |
5aef8938 | 3097 | location_t loc = tree_nonartificial_location (exp); |
4d317237 | 3098 | loc = expansion_point_location_if_in_system_header (loc); |
5aef8938 | 3099 | |
8d6c6ef5 | 3100 | if (size == slen && at_least_one) |
3101 | { | |
3102 | /* This is a call to strcpy with a destination of 0 size | |
3103 | and a source of unknown length. The call will write | |
3104 | at least one byte past the end of the destination. */ | |
3105 | warning_at (loc, opt, | |
9098b938 | 3106 | "%K%qD writing %E or more bytes into a region " |
8d6c6ef5 | 3107 | "of size %E overflows the destination", |
3108 | exp, get_callee_fndecl (exp), range[0], objsize); | |
3109 | } | |
3110 | else if (tree_int_cst_equal (range[0], range[1])) | |
5aef8938 | 3111 | warning_at (loc, opt, |
8d6c6ef5 | 3112 | (integer_onep (range[0]) |
9098b938 | 3113 | ? G_("%K%qD writing %E byte into a region " |
8d6c6ef5 | 3114 | "of size %E overflows the destination") |
3115 | : G_("%K%qD writing %E bytes into a region " | |
3116 | "of size %E overflows the destination")), | |
3117 | exp, get_callee_fndecl (exp), range[0], objsize); | |
3118 | else if (tree_int_cst_sign_bit (range[1])) | |
3119 | { | |
3120 | /* Avoid printing the upper bound if it's invalid. */ | |
3121 | warning_at (loc, opt, | |
9098b938 | 3122 | "%K%qD writing %E or more bytes into a region " |
8d6c6ef5 | 3123 | "of size %E overflows the destination", |
3124 | exp, get_callee_fndecl (exp), range[0], objsize); | |
3125 | } | |
5aef8938 | 3126 | else |
3127 | warning_at (loc, opt, | |
9098b938 | 3128 | "%K%qD writing between %E and %E bytes into " |
8d6c6ef5 | 3129 | "a region of size %E overflows the destination", |
3130 | exp, get_callee_fndecl (exp), range[0], range[1], | |
3131 | objsize); | |
5aef8938 | 3132 | |
3133 | /* Return error when an overflow has been detected. */ | |
3134 | return false; | |
3135 | } | |
3136 | } | |
3137 | ||
3138 | /* Check the maximum length of the source sequence against the size | |
3139 | of the destination object if known, or against the maximum size | |
3140 | of an object. */ | |
3141 | if (maxlen) | |
3142 | { | |
3143 | get_size_range (maxlen, range); | |
3144 | ||
3145 | if (range[0] && objsize && tree_fits_uhwi_p (objsize)) | |
3146 | { | |
3147 | location_t loc = tree_nonartificial_location (exp); | |
4d317237 | 3148 | loc = expansion_point_location_if_in_system_header (loc); |
5aef8938 | 3149 | |
3150 | if (tree_int_cst_lt (maxobjsize, range[0])) | |
3151 | { | |
3152 | /* Warn about crazy big sizes first since that's more | |
3153 | likely to be meaningful than saying that the bound | |
3154 | is greater than the object size if both are big. */ | |
3155 | if (range[0] == range[1]) | |
3156 | warning_at (loc, opt, | |
9098b938 | 3157 | "%K%qD specified bound %E " |
8d6c6ef5 | 3158 | "exceeds maximum object size %E", |
5aef8938 | 3159 | exp, get_callee_fndecl (exp), |
8d6c6ef5 | 3160 | range[0], maxobjsize); |
5aef8938 | 3161 | else |
3162 | warning_at (loc, opt, | |
9098b938 | 3163 | "%K%qD specified bound between %E and %E " |
8d6c6ef5 | 3164 | "exceeds maximum object size %E", |
5aef8938 | 3165 | exp, get_callee_fndecl (exp), |
8d6c6ef5 | 3166 | range[0], range[1], maxobjsize); |
5aef8938 | 3167 | |
3168 | return false; | |
3169 | } | |
3170 | ||
3171 | if (objsize != maxobjsize && tree_int_cst_lt (objsize, range[0])) | |
3172 | { | |
8d6c6ef5 | 3173 | if (tree_int_cst_equal (range[0], range[1])) |
5aef8938 | 3174 | warning_at (loc, opt, |
9098b938 | 3175 | "%K%qD specified bound %E " |
8d6c6ef5 | 3176 | "exceeds destination size %E", |
5aef8938 | 3177 | exp, get_callee_fndecl (exp), |
8d6c6ef5 | 3178 | range[0], objsize); |
5aef8938 | 3179 | else |
3180 | warning_at (loc, opt, | |
9098b938 | 3181 | "%K%qD specified bound between %E and %E " |
8d6c6ef5 | 3182 | "exceeds destination size %E", |
5aef8938 | 3183 | exp, get_callee_fndecl (exp), |
8d6c6ef5 | 3184 | range[0], range[1], objsize); |
5aef8938 | 3185 | return false; |
3186 | } | |
3187 | } | |
3188 | } | |
3189 | ||
8d6c6ef5 | 3190 | if (slen |
3191 | && slen == src | |
3192 | && size && range[0] | |
3193 | && tree_int_cst_lt (slen, range[0])) | |
3194 | { | |
3195 | location_t loc = tree_nonartificial_location (exp); | |
3196 | ||
3197 | if (tree_int_cst_equal (range[0], range[1])) | |
3198 | warning_at (loc, opt, | |
3199 | (tree_int_cst_equal (range[0], integer_one_node) | |
9098b938 | 3200 | ? G_("%K%qD reading %E byte from a region of size %E") |
8d6c6ef5 | 3201 | : G_("%K%qD reading %E bytes from a region of size %E")), |
3202 | exp, get_callee_fndecl (exp), range[0], slen); | |
3203 | else if (tree_int_cst_sign_bit (range[1])) | |
3204 | { | |
3205 | /* Avoid printing the upper bound if it's invalid. */ | |
3206 | warning_at (loc, opt, | |
9098b938 | 3207 | "%K%qD reading %E or more bytes from a region " |
8d6c6ef5 | 3208 | "of size %E", |
3209 | exp, get_callee_fndecl (exp), range[0], slen); | |
3210 | } | |
3211 | else | |
3212 | warning_at (loc, opt, | |
9098b938 | 3213 | "%K%qD reading between %E and %E bytes from a region " |
8d6c6ef5 | 3214 | "of size %E", |
3215 | exp, get_callee_fndecl (exp), range[0], range[1], slen); | |
3216 | return false; | |
3217 | } | |
3218 | ||
5aef8938 | 3219 | return true; |
3220 | } | |
3221 | ||
3222 | /* Helper to compute the size of the object referenced by the DEST | |
3223 | expression which must of of pointer type, using Object Size type | |
3224 | OSTYPE (only the least significant 2 bits are used). Return | |
3225 | the size of the object if successful or NULL when the size cannot | |
3226 | be determined. */ | |
3227 | ||
3228 | static inline tree | |
8d6c6ef5 | 3229 | compute_objsize (tree dest, int ostype) |
5aef8938 | 3230 | { |
3231 | unsigned HOST_WIDE_INT size; | |
3232 | if (compute_builtin_object_size (dest, ostype & 3, &size)) | |
3233 | return build_int_cst (sizetype, size); | |
3234 | ||
3235 | return NULL_TREE; | |
3236 | } | |
3237 | ||
3238 | /* Helper to determine and check the sizes of the source and the destination | |
8d6c6ef5 | 3239 | of calls to __builtin_{bzero,memcpy,mempcpy,memset} calls. EXP is the |
3240 | call expression, DEST is the destination argument, SRC is the source | |
3241 | argument or null, and LEN is the number of bytes. Use Object Size type-0 | |
3242 | regardless of the OPT_Wstringop_overflow_ setting. Return true on success | |
5aef8938 | 3243 | (no overflow or invalid sizes), false otherwise. */ |
3244 | ||
3245 | static bool | |
8d6c6ef5 | 3246 | check_memop_sizes (tree exp, tree dest, tree src, tree size) |
5aef8938 | 3247 | { |
3248 | if (!warn_stringop_overflow) | |
3249 | return true; | |
3250 | ||
3251 | /* For functions like memset and memcpy that operate on raw memory | |
8d6c6ef5 | 3252 | try to determine the size of the largest source and destination |
3253 | object using type-0 Object Size regardless of the object size | |
3254 | type specified by the option. */ | |
3255 | tree srcsize = src ? compute_objsize (src, 0) : NULL_TREE; | |
3256 | tree dstsize = compute_objsize (dest, 0); | |
5aef8938 | 3257 | |
3258 | return check_sizes (OPT_Wstringop_overflow_, exp, | |
8d6c6ef5 | 3259 | size, /*maxlen=*/NULL_TREE, srcsize, dstsize); |
3260 | } | |
3261 | ||
3262 | /* Validate memchr arguments without performing any expansion. | |
3263 | Return NULL_RTX. */ | |
3264 | ||
3265 | static rtx | |
3266 | expand_builtin_memchr (tree exp, rtx) | |
3267 | { | |
3268 | if (!validate_arglist (exp, | |
3269 | POINTER_TYPE, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
3270 | return NULL_RTX; | |
3271 | ||
3272 | tree arg1 = CALL_EXPR_ARG (exp, 0); | |
3273 | tree len = CALL_EXPR_ARG (exp, 2); | |
3274 | ||
3275 | /* Diagnose calls where the specified length exceeds the size | |
3276 | of the object. */ | |
3277 | if (warn_stringop_overflow) | |
3278 | { | |
3279 | tree size = compute_objsize (arg1, 0); | |
3280 | check_sizes (OPT_Wstringop_overflow_, | |
3281 | exp, len, /*maxlen=*/NULL_TREE, | |
3282 | size, /*objsize=*/NULL_TREE); | |
3283 | } | |
3284 | ||
3285 | return NULL_RTX; | |
5aef8938 | 3286 | } |
3287 | ||
c2f47e15 | 3288 | /* Expand a call EXP to the memcpy builtin. |
3289 | Return NULL_RTX if we failed, the caller should emit a normal call, | |
3b824fa6 | 3290 | otherwise try to get the result in TARGET, if convenient (and in |
9fe0e1b8 | 3291 | mode MODE if that's convenient). */ |
c2f47e15 | 3292 | |
53800dbe | 3293 | static rtx |
a65c4d64 | 3294 | expand_builtin_memcpy (tree exp, rtx target) |
53800dbe | 3295 | { |
c2f47e15 | 3296 | if (!validate_arglist (exp, |
3297 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
3298 | return NULL_RTX; | |
5aef8938 | 3299 | |
3300 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3301 | tree src = CALL_EXPR_ARG (exp, 1); | |
3302 | tree len = CALL_EXPR_ARG (exp, 2); | |
3303 | ||
8d6c6ef5 | 3304 | check_memop_sizes (exp, dest, src, len); |
5aef8938 | 3305 | |
d0fbba1a | 3306 | return expand_builtin_memory_copy_args (dest, src, len, target, exp, |
3307 | /*endp=*/ 0); | |
f21337ef | 3308 | } |
6840589f | 3309 | |
4d317237 | 3310 | /* Check a call EXP to the memmove built-in for validity. |
3311 | Return NULL_RTX on both success and failure. */ | |
3312 | ||
3313 | static rtx | |
3314 | expand_builtin_memmove (tree exp, rtx) | |
3315 | { | |
3316 | if (!validate_arglist (exp, | |
3317 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
3318 | return NULL_RTX; | |
3319 | ||
3320 | tree dest = CALL_EXPR_ARG (exp, 0); | |
8d6c6ef5 | 3321 | tree src = CALL_EXPR_ARG (exp, 1); |
4d317237 | 3322 | tree len = CALL_EXPR_ARG (exp, 2); |
3323 | ||
8d6c6ef5 | 3324 | check_memop_sizes (exp, dest, src, len); |
4d317237 | 3325 | |
3326 | return NULL_RTX; | |
3327 | } | |
3328 | ||
f21337ef | 3329 | /* Expand an instrumented call EXP to the memcpy builtin. |
3330 | Return NULL_RTX if we failed, the caller should emit a normal call, | |
3331 | otherwise try to get the result in TARGET, if convenient (and in | |
3332 | mode MODE if that's convenient). */ | |
53800dbe | 3333 | |
f21337ef | 3334 | static rtx |
3335 | expand_builtin_memcpy_with_bounds (tree exp, rtx target) | |
3336 | { | |
3337 | if (!validate_arglist (exp, | |
3338 | POINTER_TYPE, POINTER_BOUNDS_TYPE, | |
3339 | POINTER_TYPE, POINTER_BOUNDS_TYPE, | |
3340 | INTEGER_TYPE, VOID_TYPE)) | |
3341 | return NULL_RTX; | |
3342 | else | |
3343 | { | |
3344 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3345 | tree src = CALL_EXPR_ARG (exp, 2); | |
3346 | tree len = CALL_EXPR_ARG (exp, 4); | |
d0fbba1a | 3347 | rtx res = expand_builtin_memory_copy_args (dest, src, len, target, exp, |
3348 | /*end_p=*/ 0); | |
53800dbe | 3349 | |
f21337ef | 3350 | /* Return src bounds with the result. */ |
3351 | if (res) | |
e5716f7e | 3352 | { |
17d388d8 | 3353 | rtx bnd = force_reg (targetm.chkp_bound_mode (), |
f21337ef | 3354 | expand_normal (CALL_EXPR_ARG (exp, 1))); |
3355 | res = chkp_join_splitted_slot (res, bnd); | |
e5716f7e | 3356 | } |
f21337ef | 3357 | return res; |
53800dbe | 3358 | } |
3359 | } | |
3360 | ||
c2f47e15 | 3361 | /* Expand a call EXP to the mempcpy builtin. |
3362 | Return NULL_RTX if we failed; the caller should emit a normal call, | |
647661c6 | 3363 | otherwise try to get the result in TARGET, if convenient (and in |
9fe0e1b8 | 3364 | mode MODE if that's convenient). If ENDP is 0 return the |
3365 | destination pointer, if ENDP is 1 return the end pointer ala | |
3366 | mempcpy, and if ENDP is 2 return the end pointer minus one ala | |
3367 | stpcpy. */ | |
647661c6 | 3368 | |
3369 | static rtx | |
d0fbba1a | 3370 | expand_builtin_mempcpy (tree exp, rtx target) |
647661c6 | 3371 | { |
c2f47e15 | 3372 | if (!validate_arglist (exp, |
3373 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
3374 | return NULL_RTX; | |
5aef8938 | 3375 | |
3376 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3377 | tree src = CALL_EXPR_ARG (exp, 1); | |
3378 | tree len = CALL_EXPR_ARG (exp, 2); | |
3379 | ||
3380 | /* Avoid expanding mempcpy into memcpy when the call is determined | |
3381 | to overflow the buffer. This also prevents the same overflow | |
3382 | from being diagnosed again when expanding memcpy. */ | |
8d6c6ef5 | 3383 | if (!check_memop_sizes (exp, dest, src, len)) |
5aef8938 | 3384 | return NULL_RTX; |
3385 | ||
3386 | return expand_builtin_mempcpy_args (dest, src, len, | |
d0fbba1a | 3387 | target, exp, /*endp=*/ 1); |
f21337ef | 3388 | } |
3389 | ||
3390 | /* Expand an instrumented call EXP to the mempcpy builtin. | |
3391 | Return NULL_RTX if we failed, the caller should emit a normal call, | |
3392 | otherwise try to get the result in TARGET, if convenient (and in | |
3393 | mode MODE if that's convenient). */ | |
3394 | ||
3395 | static rtx | |
d0fbba1a | 3396 | expand_builtin_mempcpy_with_bounds (tree exp, rtx target) |
f21337ef | 3397 | { |
3398 | if (!validate_arglist (exp, | |
3399 | POINTER_TYPE, POINTER_BOUNDS_TYPE, | |
3400 | POINTER_TYPE, POINTER_BOUNDS_TYPE, | |
3401 | INTEGER_TYPE, VOID_TYPE)) | |
3402 | return NULL_RTX; | |
3403 | else | |
3404 | { | |
3405 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3406 | tree src = CALL_EXPR_ARG (exp, 2); | |
3407 | tree len = CALL_EXPR_ARG (exp, 4); | |
3408 | rtx res = expand_builtin_mempcpy_args (dest, src, len, target, | |
d0fbba1a | 3409 | exp, 1); |
f21337ef | 3410 | |
3411 | /* Return src bounds with the result. */ | |
3412 | if (res) | |
3413 | { | |
17d388d8 | 3414 | rtx bnd = force_reg (targetm.chkp_bound_mode (), |
f21337ef | 3415 | expand_normal (CALL_EXPR_ARG (exp, 1))); |
3416 | res = chkp_join_splitted_slot (res, bnd); | |
3417 | } | |
3418 | return res; | |
c2f47e15 | 3419 | } |
3420 | } | |
3421 | ||
d0fbba1a | 3422 | /* Helper function to do the actual work for expand of memory copy family |
3423 | functions (memcpy, mempcpy, stpcpy). Expansing should assign LEN bytes | |
3424 | of memory from SRC to DEST and assign to TARGET if convenient. | |
3425 | If ENDP is 0 return the | |
3426 | destination pointer, if ENDP is 1 return the end pointer ala | |
3427 | mempcpy, and if ENDP is 2 return the end pointer minus one ala | |
3428 | stpcpy. */ | |
c2f47e15 | 3429 | |
3430 | static rtx | |
d0fbba1a | 3431 | expand_builtin_memory_copy_args (tree dest, tree src, tree len, |
3432 | rtx target, tree exp, int endp) | |
c2f47e15 | 3433 | { |
d0fbba1a | 3434 | const char *src_str; |
3435 | unsigned int src_align = get_pointer_alignment (src); | |
3436 | unsigned int dest_align = get_pointer_alignment (dest); | |
3437 | rtx dest_mem, src_mem, dest_addr, len_rtx; | |
3438 | HOST_WIDE_INT expected_size = -1; | |
3439 | unsigned int expected_align = 0; | |
3440 | unsigned HOST_WIDE_INT min_size; | |
3441 | unsigned HOST_WIDE_INT max_size; | |
3442 | unsigned HOST_WIDE_INT probable_max_size; | |
f21337ef | 3443 | |
d0fbba1a | 3444 | /* If DEST is not a pointer type, call the normal function. */ |
3445 | if (dest_align == 0) | |
3446 | return NULL_RTX; | |
a0c938f0 | 3447 | |
d0fbba1a | 3448 | /* If either SRC is not a pointer type, don't do this |
3449 | operation in-line. */ | |
3450 | if (src_align == 0) | |
3451 | return NULL_RTX; | |
9fe0e1b8 | 3452 | |
d0fbba1a | 3453 | if (currently_expanding_gimple_stmt) |
3454 | stringop_block_profile (currently_expanding_gimple_stmt, | |
3455 | &expected_align, &expected_size); | |
0862b7e9 | 3456 | |
d0fbba1a | 3457 | if (expected_align < dest_align) |
3458 | expected_align = dest_align; | |
3459 | dest_mem = get_memory_rtx (dest, len); | |
3460 | set_mem_align (dest_mem, dest_align); | |
3461 | len_rtx = expand_normal (len); | |
3462 | determine_block_size (len, len_rtx, &min_size, &max_size, | |
3463 | &probable_max_size); | |
3464 | src_str = c_getstr (src); | |
647661c6 | 3465 | |
d0fbba1a | 3466 | /* If SRC is a string constant and block move would be done |
3467 | by pieces, we can avoid loading the string from memory | |
3468 | and only stored the computed constants. */ | |
3469 | if (src_str | |
3470 | && CONST_INT_P (len_rtx) | |
3471 | && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1 | |
3472 | && can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str, | |
3473 | CONST_CAST (char *, src_str), | |
3474 | dest_align, false)) | |
3475 | { | |
3476 | dest_mem = store_by_pieces (dest_mem, INTVAL (len_rtx), | |
3477 | builtin_memcpy_read_str, | |
d72123ce | 3478 | CONST_CAST (char *, src_str), |
d0fbba1a | 3479 | dest_align, false, endp); |
3480 | dest_mem = force_operand (XEXP (dest_mem, 0), target); | |
3481 | dest_mem = convert_memory_address (ptr_mode, dest_mem); | |
3482 | return dest_mem; | |
3483 | } | |
647661c6 | 3484 | |
d0fbba1a | 3485 | src_mem = get_memory_rtx (src, len); |
3486 | set_mem_align (src_mem, src_align); | |
9fe0e1b8 | 3487 | |
d0fbba1a | 3488 | /* Copy word part most expediently. */ |
3489 | dest_addr = emit_block_move_hints (dest_mem, src_mem, len_rtx, | |
3490 | CALL_EXPR_TAILCALL (exp) | |
3491 | && (endp == 0 || target == const0_rtx) | |
3492 | ? BLOCK_OP_TAILCALL : BLOCK_OP_NORMAL, | |
3493 | expected_align, expected_size, | |
3494 | min_size, max_size, probable_max_size); | |
3495 | ||
3496 | if (dest_addr == 0) | |
3497 | { | |
3498 | dest_addr = force_operand (XEXP (dest_mem, 0), target); | |
3499 | dest_addr = convert_memory_address (ptr_mode, dest_addr); | |
3500 | } | |
3501 | ||
3502 | if (endp && target != const0_rtx) | |
3503 | { | |
3504 | dest_addr = gen_rtx_PLUS (ptr_mode, dest_addr, len_rtx); | |
3505 | /* stpcpy pointer to last byte. */ | |
3506 | if (endp == 2) | |
3507 | dest_addr = gen_rtx_MINUS (ptr_mode, dest_addr, const1_rtx); | |
d72123ce | 3508 | } |
d0fbba1a | 3509 | |
3510 | return dest_addr; | |
3511 | } | |
3512 | ||
3513 | static rtx | |
3514 | expand_builtin_mempcpy_args (tree dest, tree src, tree len, | |
3515 | rtx target, tree orig_exp, int endp) | |
3516 | { | |
3517 | return expand_builtin_memory_copy_args (dest, src, len, target, orig_exp, | |
3518 | endp); | |
647661c6 | 3519 | } |
3520 | ||
c2f47e15 | 3521 | /* Expand into a movstr instruction, if one is available. Return NULL_RTX if |
727c62dd | 3522 | we failed, the caller should emit a normal call, otherwise try to |
3523 | get the result in TARGET, if convenient. If ENDP is 0 return the | |
3524 | destination pointer, if ENDP is 1 return the end pointer ala | |
3525 | mempcpy, and if ENDP is 2 return the end pointer minus one ala | |
3526 | stpcpy. */ | |
3527 | ||
3528 | static rtx | |
3529 | expand_movstr (tree dest, tree src, rtx target, int endp) | |
3530 | { | |
8786db1e | 3531 | struct expand_operand ops[3]; |
727c62dd | 3532 | rtx dest_mem; |
3533 | rtx src_mem; | |
727c62dd | 3534 | |
8d74dc42 | 3535 | if (!targetm.have_movstr ()) |
c2f47e15 | 3536 | return NULL_RTX; |
727c62dd | 3537 | |
d8ae1baa | 3538 | dest_mem = get_memory_rtx (dest, NULL); |
3539 | src_mem = get_memory_rtx (src, NULL); | |
727c62dd | 3540 | if (!endp) |
3541 | { | |
3542 | target = force_reg (Pmode, XEXP (dest_mem, 0)); | |
3543 | dest_mem = replace_equiv_address (dest_mem, target); | |
727c62dd | 3544 | } |
3545 | ||
8786db1e | 3546 | create_output_operand (&ops[0], endp ? target : NULL_RTX, Pmode); |
3547 | create_fixed_operand (&ops[1], dest_mem); | |
3548 | create_fixed_operand (&ops[2], src_mem); | |
8d74dc42 | 3549 | if (!maybe_expand_insn (targetm.code_for_movstr, 3, ops)) |
1e1d5623 | 3550 | return NULL_RTX; |
727c62dd | 3551 | |
8786db1e | 3552 | if (endp && target != const0_rtx) |
c5aba89c | 3553 | { |
8786db1e | 3554 | target = ops[0].value; |
3555 | /* movstr is supposed to set end to the address of the NUL | |
3556 | terminator. If the caller requested a mempcpy-like return value, | |
3557 | adjust it. */ | |
3558 | if (endp == 1) | |
3559 | { | |
29c05e22 | 3560 | rtx tem = plus_constant (GET_MODE (target), |
3561 | gen_lowpart (GET_MODE (target), target), 1); | |
8786db1e | 3562 | emit_move_insn (target, force_operand (tem, NULL_RTX)); |
3563 | } | |
c5aba89c | 3564 | } |
727c62dd | 3565 | return target; |
3566 | } | |
3567 | ||
5aef8938 | 3568 | /* Do some very basic size validation of a call to the strcpy builtin |
3569 | given by EXP. Return NULL_RTX to have the built-in expand to a call | |
3570 | to the library function. */ | |
3571 | ||
3572 | static rtx | |
3573 | expand_builtin_strcat (tree exp, rtx) | |
3574 | { | |
3575 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE) | |
3576 | || !warn_stringop_overflow) | |
3577 | return NULL_RTX; | |
3578 | ||
3579 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3580 | tree src = CALL_EXPR_ARG (exp, 1); | |
3581 | ||
3582 | /* There is no way here to determine the length of the string in | |
3583 | the destination to which the SRC string is being appended so | |
3584 | just diagnose cases when the souce string is longer than | |
3585 | the destination object. */ | |
3586 | ||
8d6c6ef5 | 3587 | tree destsize = compute_objsize (dest, warn_stringop_overflow - 1); |
5aef8938 | 3588 | |
3589 | check_sizes (OPT_Wstringop_overflow_, | |
3590 | exp, /*size=*/NULL_TREE, /*maxlen=*/NULL_TREE, src, destsize); | |
3591 | ||
3592 | return NULL_RTX; | |
3593 | } | |
3594 | ||
48e1416a | 3595 | /* Expand expression EXP, which is a call to the strcpy builtin. Return |
3596 | NULL_RTX if we failed the caller should emit a normal call, otherwise | |
c2f47e15 | 3597 | try to get the result in TARGET, if convenient (and in mode MODE if that's |
6f428e8b | 3598 | convenient). */ |
902de8ed | 3599 | |
53800dbe | 3600 | static rtx |
a65c4d64 | 3601 | expand_builtin_strcpy (tree exp, rtx target) |
53800dbe | 3602 | { |
5aef8938 | 3603 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
3604 | return NULL_RTX; | |
3605 | ||
3606 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3607 | tree src = CALL_EXPR_ARG (exp, 1); | |
3608 | ||
3609 | if (warn_stringop_overflow) | |
3610 | { | |
8d6c6ef5 | 3611 | tree destsize = compute_objsize (dest, warn_stringop_overflow - 1); |
5aef8938 | 3612 | check_sizes (OPT_Wstringop_overflow_, |
3613 | exp, /*size=*/NULL_TREE, /*maxlen=*/NULL_TREE, src, destsize); | |
3614 | } | |
3615 | ||
3616 | return expand_builtin_strcpy_args (dest, src, target); | |
c2f47e15 | 3617 | } |
3618 | ||
3619 | /* Helper function to do the actual work for expand_builtin_strcpy. The | |
3620 | arguments to the builtin_strcpy call DEST and SRC are broken out | |
3621 | so that this can also be called without constructing an actual CALL_EXPR. | |
3622 | The other arguments and return value are the same as for | |
3623 | expand_builtin_strcpy. */ | |
3624 | ||
3625 | static rtx | |
a65c4d64 | 3626 | expand_builtin_strcpy_args (tree dest, tree src, rtx target) |
c2f47e15 | 3627 | { |
c2f47e15 | 3628 | return expand_movstr (dest, src, target, /*endp=*/0); |
53800dbe | 3629 | } |
3630 | ||
c2f47e15 | 3631 | /* Expand a call EXP to the stpcpy builtin. |
3632 | Return NULL_RTX if we failed the caller should emit a normal call, | |
3b824fa6 | 3633 | otherwise try to get the result in TARGET, if convenient (and in |
3634 | mode MODE if that's convenient). */ | |
3635 | ||
3636 | static rtx | |
3754d046 | 3637 | expand_builtin_stpcpy (tree exp, rtx target, machine_mode mode) |
3b824fa6 | 3638 | { |
c2f47e15 | 3639 | tree dst, src; |
389dd41b | 3640 | location_t loc = EXPR_LOCATION (exp); |
c2f47e15 | 3641 | |
3642 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) | |
3643 | return NULL_RTX; | |
3644 | ||
3645 | dst = CALL_EXPR_ARG (exp, 0); | |
3646 | src = CALL_EXPR_ARG (exp, 1); | |
3647 | ||
4d317237 | 3648 | if (warn_stringop_overflow) |
3649 | { | |
8d6c6ef5 | 3650 | tree destsize = compute_objsize (dst, warn_stringop_overflow - 1); |
4d317237 | 3651 | check_sizes (OPT_Wstringop_overflow_, |
3652 | exp, /*size=*/NULL_TREE, /*maxlen=*/NULL_TREE, src, destsize); | |
3653 | } | |
3654 | ||
727c62dd | 3655 | /* If return value is ignored, transform stpcpy into strcpy. */ |
b9a16870 | 3656 | if (target == const0_rtx && builtin_decl_implicit (BUILT_IN_STRCPY)) |
978836e5 | 3657 | { |
b9a16870 | 3658 | tree fn = builtin_decl_implicit (BUILT_IN_STRCPY); |
0568e9c1 | 3659 | tree result = build_call_nofold_loc (loc, fn, 2, dst, src); |
c8b17b2e | 3660 | return expand_expr (result, target, mode, EXPAND_NORMAL); |
978836e5 | 3661 | } |
3b824fa6 | 3662 | else |
3663 | { | |
c2f47e15 | 3664 | tree len, lenp1; |
727c62dd | 3665 | rtx ret; |
647661c6 | 3666 | |
9fe0e1b8 | 3667 | /* Ensure we get an actual string whose length can be evaluated at |
a0c938f0 | 3668 | compile-time, not an expression containing a string. This is |
3669 | because the latter will potentially produce pessimized code | |
3670 | when used to produce the return value. */ | |
681fab1e | 3671 | if (! c_getstr (src) || ! (len = c_strlen (src, 0))) |
c2f47e15 | 3672 | return expand_movstr (dst, src, target, /*endp=*/2); |
3b824fa6 | 3673 | |
389dd41b | 3674 | lenp1 = size_binop_loc (loc, PLUS_EXPR, len, ssize_int (1)); |
a65c4d64 | 3675 | ret = expand_builtin_mempcpy_args (dst, src, lenp1, |
d0fbba1a | 3676 | target, exp, /*endp=*/2); |
727c62dd | 3677 | |
3678 | if (ret) | |
3679 | return ret; | |
3680 | ||
3681 | if (TREE_CODE (len) == INTEGER_CST) | |
3682 | { | |
8ec3c5c2 | 3683 | rtx len_rtx = expand_normal (len); |
727c62dd | 3684 | |
971ba038 | 3685 | if (CONST_INT_P (len_rtx)) |
727c62dd | 3686 | { |
a65c4d64 | 3687 | ret = expand_builtin_strcpy_args (dst, src, target); |
727c62dd | 3688 | |
3689 | if (ret) | |
3690 | { | |
3691 | if (! target) | |
7ac87324 | 3692 | { |
3693 | if (mode != VOIDmode) | |
3694 | target = gen_reg_rtx (mode); | |
3695 | else | |
3696 | target = gen_reg_rtx (GET_MODE (ret)); | |
3697 | } | |
727c62dd | 3698 | if (GET_MODE (target) != GET_MODE (ret)) |
3699 | ret = gen_lowpart (GET_MODE (target), ret); | |
3700 | ||
29c05e22 | 3701 | ret = plus_constant (GET_MODE (ret), ret, INTVAL (len_rtx)); |
c5aba89c | 3702 | ret = emit_move_insn (target, force_operand (ret, NULL_RTX)); |
64db345d | 3703 | gcc_assert (ret); |
727c62dd | 3704 | |
3705 | return target; | |
3706 | } | |
3707 | } | |
3708 | } | |
3709 | ||
c2f47e15 | 3710 | return expand_movstr (dst, src, target, /*endp=*/2); |
3b824fa6 | 3711 | } |
3712 | } | |
3713 | ||
4d317237 | 3714 | /* Check a call EXP to the stpncpy built-in for validity. |
3715 | Return NULL_RTX on both success and failure. */ | |
3716 | ||
3717 | static rtx | |
3718 | expand_builtin_stpncpy (tree exp, rtx) | |
3719 | { | |
3720 | if (!validate_arglist (exp, | |
3721 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE) | |
3722 | || !warn_stringop_overflow) | |
3723 | return NULL_RTX; | |
3724 | ||
aca1a787 | 3725 | /* The source and destination of the call. */ |
4d317237 | 3726 | tree dest = CALL_EXPR_ARG (exp, 0); |
3727 | tree src = CALL_EXPR_ARG (exp, 1); | |
3728 | ||
aca1a787 | 3729 | /* The exact number of bytes to write (not the maximum). */ |
4d317237 | 3730 | tree len = CALL_EXPR_ARG (exp, 2); |
4d317237 | 3731 | |
aca1a787 | 3732 | /* The size of the destination object. */ |
8d6c6ef5 | 3733 | tree destsize = compute_objsize (dest, warn_stringop_overflow - 1); |
4d317237 | 3734 | |
4d317237 | 3735 | check_sizes (OPT_Wstringop_overflow_, |
aca1a787 | 3736 | exp, len, /*maxlen=*/NULL_TREE, src, destsize); |
4d317237 | 3737 | |
3738 | return NULL_RTX; | |
3739 | } | |
3740 | ||
6840589f | 3741 | /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE) |
3742 | bytes from constant string DATA + OFFSET and return it as target | |
3743 | constant. */ | |
3744 | ||
09879952 | 3745 | rtx |
aecda0d6 | 3746 | builtin_strncpy_read_str (void *data, HOST_WIDE_INT offset, |
3754d046 | 3747 | machine_mode mode) |
6840589f | 3748 | { |
3749 | const char *str = (const char *) data; | |
3750 | ||
3751 | if ((unsigned HOST_WIDE_INT) offset > strlen (str)) | |
3752 | return const0_rtx; | |
3753 | ||
3754 | return c_readstr (str + offset, mode); | |
3755 | } | |
3756 | ||
5aef8938 | 3757 | /* Helper to check the sizes of sequences and the destination of calls |
3758 | to __builtin_strncat and __builtin___strncat_chk. Returns true on | |
3759 | success (no overflow or invalid sizes), false otherwise. */ | |
3760 | ||
3761 | static bool | |
3762 | check_strncat_sizes (tree exp, tree objsize) | |
3763 | { | |
3764 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3765 | tree src = CALL_EXPR_ARG (exp, 1); | |
3766 | tree maxlen = CALL_EXPR_ARG (exp, 2); | |
3767 | ||
3768 | /* Try to determine the range of lengths that the source expression | |
3769 | refers to. */ | |
3770 | tree lenrange[2]; | |
3771 | get_range_strlen (src, lenrange); | |
3772 | ||
3773 | /* Try to verify that the destination is big enough for the shortest | |
3774 | string. */ | |
3775 | ||
3776 | if (!objsize && warn_stringop_overflow) | |
3777 | { | |
3778 | /* If it hasn't been provided by __strncat_chk, try to determine | |
3779 | the size of the destination object into which the source is | |
3780 | being copied. */ | |
8d6c6ef5 | 3781 | objsize = compute_objsize (dest, warn_stringop_overflow - 1); |
5aef8938 | 3782 | } |
3783 | ||
3784 | /* Add one for the terminating nul. */ | |
3785 | tree srclen = (lenrange[0] | |
3786 | ? fold_build2 (PLUS_EXPR, size_type_node, lenrange[0], | |
3787 | size_one_node) | |
3788 | : NULL_TREE); | |
3789 | ||
3790 | /* Strncat copies at most MAXLEN bytes and always appends the terminating | |
3791 | nul so the specified upper bound should never be equal to (or greater | |
3792 | than) the size of the destination. */ | |
3793 | if (tree_fits_uhwi_p (maxlen) && tree_fits_uhwi_p (objsize) | |
3794 | && tree_int_cst_equal (objsize, maxlen)) | |
3795 | { | |
4d317237 | 3796 | location_t loc = tree_nonartificial_location (exp); |
3797 | loc = expansion_point_location_if_in_system_header (loc); | |
3798 | ||
3799 | warning_at (loc, OPT_Wstringop_overflow_, | |
9098b938 | 3800 | "%K%qD specified bound %E equals destination size", |
8d6c6ef5 | 3801 | exp, get_callee_fndecl (exp), maxlen); |
5aef8938 | 3802 | |
3803 | return false; | |
3804 | } | |
3805 | ||
3806 | if (!srclen | |
3807 | || (maxlen && tree_fits_uhwi_p (maxlen) | |
3808 | && tree_fits_uhwi_p (srclen) | |
3809 | && tree_int_cst_lt (maxlen, srclen))) | |
3810 | srclen = maxlen; | |
3811 | ||
3812 | /* The number of bytes to write is LEN but check_sizes will also | |
3813 | check SRCLEN if LEN's value isn't known. */ | |
3814 | return check_sizes (OPT_Wstringop_overflow_, | |
3815 | exp, /*size=*/NULL_TREE, maxlen, srclen, objsize); | |
3816 | } | |
3817 | ||
3818 | /* Similar to expand_builtin_strcat, do some very basic size validation | |
3819 | of a call to the strcpy builtin given by EXP. Return NULL_RTX to have | |
3820 | the built-in expand to a call to the library function. */ | |
3821 | ||
3822 | static rtx | |
3823 | expand_builtin_strncat (tree exp, rtx) | |
3824 | { | |
3825 | if (!validate_arglist (exp, | |
3826 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE) | |
3827 | || !warn_stringop_overflow) | |
3828 | return NULL_RTX; | |
3829 | ||
3830 | tree dest = CALL_EXPR_ARG (exp, 0); | |
3831 | tree src = CALL_EXPR_ARG (exp, 1); | |
3832 | /* The upper bound on the number of bytes to write. */ | |
3833 | tree maxlen = CALL_EXPR_ARG (exp, 2); | |
3834 | /* The length of the source sequence. */ | |
3835 | tree slen = c_strlen (src, 1); | |
3836 | ||
3837 | /* Try to determine the range of lengths that the source expression | |
3838 | refers to. */ | |
3839 | tree lenrange[2]; | |
3840 | if (slen) | |
3841 | lenrange[0] = lenrange[1] = slen; | |
3842 | else | |
3843 | get_range_strlen (src, lenrange); | |
3844 | ||
3845 | /* Try to verify that the destination is big enough for the shortest | |
3846 | string. First try to determine the size of the destination object | |
3847 | into which the source is being copied. */ | |
8d6c6ef5 | 3848 | tree destsize = compute_objsize (dest, warn_stringop_overflow - 1); |
5aef8938 | 3849 | |
3850 | /* Add one for the terminating nul. */ | |
3851 | tree srclen = (lenrange[0] | |
3852 | ? fold_build2 (PLUS_EXPR, size_type_node, lenrange[0], | |
3853 | size_one_node) | |
3854 | : NULL_TREE); | |
3855 | ||
3856 | /* Strncat copies at most MAXLEN bytes and always appends the terminating | |
3857 | nul so the specified upper bound should never be equal to (or greater | |
3858 | than) the size of the destination. */ | |
3859 | if (tree_fits_uhwi_p (maxlen) && tree_fits_uhwi_p (destsize) | |
3860 | && tree_int_cst_equal (destsize, maxlen)) | |
3861 | { | |
4d317237 | 3862 | location_t loc = tree_nonartificial_location (exp); |
3863 | loc = expansion_point_location_if_in_system_header (loc); | |
3864 | ||
3865 | warning_at (loc, OPT_Wstringop_overflow_, | |
9098b938 | 3866 | "%K%qD specified bound %E equals destination size", |
8d6c6ef5 | 3867 | exp, get_callee_fndecl (exp), maxlen); |
5aef8938 | 3868 | |
3869 | return NULL_RTX; | |
3870 | } | |
3871 | ||
3872 | if (!srclen | |
3873 | || (maxlen && tree_fits_uhwi_p (maxlen) | |
3874 | && tree_fits_uhwi_p (srclen) | |
3875 | && tree_int_cst_lt (maxlen, srclen))) | |
3876 | srclen = maxlen; | |
3877 | ||
3878 | /* The number of bytes to write is LEN but check_sizes will also | |
3879 | check SRCLEN if LEN's value isn't known. */ | |
3880 | check_sizes (OPT_Wstringop_overflow_, | |
3881 | exp, /*size=*/NULL_TREE, maxlen, srclen, destsize); | |
3882 | ||
3883 | return NULL_RTX; | |
3884 | } | |
3885 | ||
48e1416a | 3886 | /* Expand expression EXP, which is a call to the strncpy builtin. Return |
c2f47e15 | 3887 | NULL_RTX if we failed the caller should emit a normal call. */ |
ed09096d | 3888 | |
3889 | static rtx | |
a65c4d64 | 3890 | expand_builtin_strncpy (tree exp, rtx target) |
ed09096d | 3891 | { |
389dd41b | 3892 | location_t loc = EXPR_LOCATION (exp); |
c2f47e15 | 3893 | |
3894 | if (validate_arglist (exp, | |
3895 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
ed09096d | 3896 | { |
c2f47e15 | 3897 | tree dest = CALL_EXPR_ARG (exp, 0); |
3898 | tree src = CALL_EXPR_ARG (exp, 1); | |
5aef8938 | 3899 | /* The number of bytes to write (not the maximum). */ |
c2f47e15 | 3900 | tree len = CALL_EXPR_ARG (exp, 2); |
5aef8938 | 3901 | /* The length of the source sequence. */ |
c2f47e15 | 3902 | tree slen = c_strlen (src, 1); |
6840589f | 3903 | |
5aef8938 | 3904 | if (warn_stringop_overflow) |
3905 | { | |
8d6c6ef5 | 3906 | tree destsize = compute_objsize (dest, |
3907 | warn_stringop_overflow - 1); | |
5aef8938 | 3908 | |
3909 | /* The number of bytes to write is LEN but check_sizes will also | |
3910 | check SLEN if LEN's value isn't known. */ | |
3911 | check_sizes (OPT_Wstringop_overflow_, | |
8d6c6ef5 | 3912 | exp, len, /*maxlen=*/NULL_TREE, src, destsize); |
5aef8938 | 3913 | } |
3914 | ||
8ff6a5cd | 3915 | /* We must be passed a constant len and src parameter. */ |
e913b5cd | 3916 | if (!tree_fits_uhwi_p (len) || !slen || !tree_fits_uhwi_p (slen)) |
c2f47e15 | 3917 | return NULL_RTX; |
ed09096d | 3918 | |
389dd41b | 3919 | slen = size_binop_loc (loc, PLUS_EXPR, slen, ssize_int (1)); |
ed09096d | 3920 | |
3921 | /* We're required to pad with trailing zeros if the requested | |
a0c938f0 | 3922 | len is greater than strlen(s2)+1. In that case try to |
6840589f | 3923 | use store_by_pieces, if it fails, punt. */ |
ed09096d | 3924 | if (tree_int_cst_lt (slen, len)) |
6840589f | 3925 | { |
957d0361 | 3926 | unsigned int dest_align = get_pointer_alignment (dest); |
c2f47e15 | 3927 | const char *p = c_getstr (src); |
6840589f | 3928 | rtx dest_mem; |
3929 | ||
e913b5cd | 3930 | if (!p || dest_align == 0 || !tree_fits_uhwi_p (len) |
3931 | || !can_store_by_pieces (tree_to_uhwi (len), | |
6840589f | 3932 | builtin_strncpy_read_str, |
364c0c59 | 3933 | CONST_CAST (char *, p), |
3934 | dest_align, false)) | |
c2f47e15 | 3935 | return NULL_RTX; |
6840589f | 3936 | |
d8ae1baa | 3937 | dest_mem = get_memory_rtx (dest, len); |
e913b5cd | 3938 | store_by_pieces (dest_mem, tree_to_uhwi (len), |
6840589f | 3939 | builtin_strncpy_read_str, |
364c0c59 | 3940 | CONST_CAST (char *, p), dest_align, false, 0); |
a65c4d64 | 3941 | dest_mem = force_operand (XEXP (dest_mem, 0), target); |
85d654dd | 3942 | dest_mem = convert_memory_address (ptr_mode, dest_mem); |
e5716f7e | 3943 | return dest_mem; |
6840589f | 3944 | } |
ed09096d | 3945 | } |
c2f47e15 | 3946 | return NULL_RTX; |
ed09096d | 3947 | } |
3948 | ||
ecc318ff | 3949 | /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE) |
3950 | bytes from constant string DATA + OFFSET and return it as target | |
3951 | constant. */ | |
3952 | ||
f656b751 | 3953 | rtx |
aecda0d6 | 3954 | builtin_memset_read_str (void *data, HOST_WIDE_INT offset ATTRIBUTE_UNUSED, |
3754d046 | 3955 | machine_mode mode) |
ecc318ff | 3956 | { |
3957 | const char *c = (const char *) data; | |
364c0c59 | 3958 | char *p = XALLOCAVEC (char, GET_MODE_SIZE (mode)); |
ecc318ff | 3959 | |
3960 | memset (p, *c, GET_MODE_SIZE (mode)); | |
3961 | ||
3962 | return c_readstr (p, mode); | |
3963 | } | |
3964 | ||
a7ec6974 | 3965 | /* Callback routine for store_by_pieces. Return the RTL of a register |
3966 | containing GET_MODE_SIZE (MODE) consecutive copies of the unsigned | |
3967 | char value given in the RTL register data. For example, if mode is | |
3968 | 4 bytes wide, return the RTL for 0x01010101*data. */ | |
3969 | ||
3970 | static rtx | |
aecda0d6 | 3971 | builtin_memset_gen_str (void *data, HOST_WIDE_INT offset ATTRIBUTE_UNUSED, |
3754d046 | 3972 | machine_mode mode) |
a7ec6974 | 3973 | { |
3974 | rtx target, coeff; | |
3975 | size_t size; | |
3976 | char *p; | |
3977 | ||
3978 | size = GET_MODE_SIZE (mode); | |
f0ce3b1f | 3979 | if (size == 1) |
3980 | return (rtx) data; | |
a7ec6974 | 3981 | |
364c0c59 | 3982 | p = XALLOCAVEC (char, size); |
a7ec6974 | 3983 | memset (p, 1, size); |
3984 | coeff = c_readstr (p, mode); | |
3985 | ||
f0ce3b1f | 3986 | target = convert_to_mode (mode, (rtx) data, 1); |
a7ec6974 | 3987 | target = expand_mult (mode, target, coeff, NULL_RTX, 1); |
3988 | return force_reg (mode, target); | |
3989 | } | |
3990 | ||
48e1416a | 3991 | /* Expand expression EXP, which is a call to the memset builtin. Return |
3992 | NULL_RTX if we failed the caller should emit a normal call, otherwise | |
c2f47e15 | 3993 | try to get the result in TARGET, if convenient (and in mode MODE if that's |
6f428e8b | 3994 | convenient). */ |
902de8ed | 3995 | |
53800dbe | 3996 | static rtx |
3754d046 | 3997 | expand_builtin_memset (tree exp, rtx target, machine_mode mode) |
53800dbe | 3998 | { |
c2f47e15 | 3999 | if (!validate_arglist (exp, |
4000 | POINTER_TYPE, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
4001 | return NULL_RTX; | |
5aef8938 | 4002 | |
4003 | tree dest = CALL_EXPR_ARG (exp, 0); | |
4004 | tree val = CALL_EXPR_ARG (exp, 1); | |
4005 | tree len = CALL_EXPR_ARG (exp, 2); | |
4006 | ||
8d6c6ef5 | 4007 | check_memop_sizes (exp, dest, NULL_TREE, len); |
5aef8938 | 4008 | |
4009 | return expand_builtin_memset_args (dest, val, len, target, mode, exp); | |
c2f47e15 | 4010 | } |
53800dbe | 4011 | |
f21337ef | 4012 | /* Expand expression EXP, which is an instrumented call to the memset builtin. |
4013 | Return NULL_RTX if we failed the caller should emit a normal call, otherwise | |
4014 | try to get the result in TARGET, if convenient (and in mode MODE if that's | |
4015 | convenient). */ | |
4016 | ||
4017 | static rtx | |
4018 | expand_builtin_memset_with_bounds (tree exp, rtx target, machine_mode mode) | |
4019 | { | |
4020 | if (!validate_arglist (exp, | |
4021 | POINTER_TYPE, POINTER_BOUNDS_TYPE, | |
4022 | INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
4023 | return NULL_RTX; | |
4024 | else | |
4025 | { | |
4026 | tree dest = CALL_EXPR_ARG (exp, 0); | |
4027 | tree val = CALL_EXPR_ARG (exp, 2); | |
4028 | tree len = CALL_EXPR_ARG (exp, 3); | |
4029 | rtx res = expand_builtin_memset_args (dest, val, len, target, mode, exp); | |
4030 | ||
4031 | /* Return src bounds with the result. */ | |
4032 | if (res) | |
4033 | { | |
17d388d8 | 4034 | rtx bnd = force_reg (targetm.chkp_bound_mode (), |
f21337ef | 4035 | expand_normal (CALL_EXPR_ARG (exp, 1))); |
4036 | res = chkp_join_splitted_slot (res, bnd); | |
4037 | } | |
4038 | return res; | |
4039 | } | |
4040 | } | |
4041 | ||
c2f47e15 | 4042 | /* Helper function to do the actual work for expand_builtin_memset. The |
4043 | arguments to the builtin_memset call DEST, VAL, and LEN are broken out | |
4044 | so that this can also be called without constructing an actual CALL_EXPR. | |
4045 | The other arguments and return value are the same as for | |
4046 | expand_builtin_memset. */ | |
6b961939 | 4047 | |
c2f47e15 | 4048 | static rtx |
4049 | expand_builtin_memset_args (tree dest, tree val, tree len, | |
3754d046 | 4050 | rtx target, machine_mode mode, tree orig_exp) |
c2f47e15 | 4051 | { |
4052 | tree fndecl, fn; | |
4053 | enum built_in_function fcode; | |
3754d046 | 4054 | machine_mode val_mode; |
c2f47e15 | 4055 | char c; |
4056 | unsigned int dest_align; | |
4057 | rtx dest_mem, dest_addr, len_rtx; | |
4058 | HOST_WIDE_INT expected_size = -1; | |
4059 | unsigned int expected_align = 0; | |
36d63243 | 4060 | unsigned HOST_WIDE_INT min_size; |
4061 | unsigned HOST_WIDE_INT max_size; | |
9db0f34d | 4062 | unsigned HOST_WIDE_INT probable_max_size; |
53800dbe | 4063 | |
957d0361 | 4064 | dest_align = get_pointer_alignment (dest); |
162719b3 | 4065 | |
c2f47e15 | 4066 | /* If DEST is not a pointer type, don't do this operation in-line. */ |
4067 | if (dest_align == 0) | |
4068 | return NULL_RTX; | |
6f428e8b | 4069 | |
8cee8dc0 | 4070 | if (currently_expanding_gimple_stmt) |
4071 | stringop_block_profile (currently_expanding_gimple_stmt, | |
4072 | &expected_align, &expected_size); | |
75a70cf9 | 4073 | |
c2f47e15 | 4074 | if (expected_align < dest_align) |
4075 | expected_align = dest_align; | |
6b961939 | 4076 | |
c2f47e15 | 4077 | /* If the LEN parameter is zero, return DEST. */ |
4078 | if (integer_zerop (len)) | |
4079 | { | |
4080 | /* Evaluate and ignore VAL in case it has side-effects. */ | |
4081 | expand_expr (val, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
4082 | return expand_expr (dest, target, mode, EXPAND_NORMAL); | |
4083 | } | |
7a3e5564 | 4084 | |
c2f47e15 | 4085 | /* Stabilize the arguments in case we fail. */ |
4086 | dest = builtin_save_expr (dest); | |
4087 | val = builtin_save_expr (val); | |
4088 | len = builtin_save_expr (len); | |
a7ec6974 | 4089 | |
c2f47e15 | 4090 | len_rtx = expand_normal (len); |
9db0f34d | 4091 | determine_block_size (len, len_rtx, &min_size, &max_size, |
4092 | &probable_max_size); | |
c2f47e15 | 4093 | dest_mem = get_memory_rtx (dest, len); |
03a5dda9 | 4094 | val_mode = TYPE_MODE (unsigned_char_type_node); |
a7ec6974 | 4095 | |
c2f47e15 | 4096 | if (TREE_CODE (val) != INTEGER_CST) |
4097 | { | |
4098 | rtx val_rtx; | |
a7ec6974 | 4099 | |
c2f47e15 | 4100 | val_rtx = expand_normal (val); |
03a5dda9 | 4101 | val_rtx = convert_to_mode (val_mode, val_rtx, 0); |
53800dbe | 4102 | |
c2f47e15 | 4103 | /* Assume that we can memset by pieces if we can store |
4104 | * the coefficients by pieces (in the required modes). | |
4105 | * We can't pass builtin_memset_gen_str as that emits RTL. */ | |
4106 | c = 1; | |
e913b5cd | 4107 | if (tree_fits_uhwi_p (len) |
4108 | && can_store_by_pieces (tree_to_uhwi (len), | |
4b297e2e | 4109 | builtin_memset_read_str, &c, dest_align, |
4110 | true)) | |
c2f47e15 | 4111 | { |
03a5dda9 | 4112 | val_rtx = force_reg (val_mode, val_rtx); |
e913b5cd | 4113 | store_by_pieces (dest_mem, tree_to_uhwi (len), |
4b297e2e | 4114 | builtin_memset_gen_str, val_rtx, dest_align, |
4115 | true, 0); | |
c2f47e15 | 4116 | } |
4117 | else if (!set_storage_via_setmem (dest_mem, len_rtx, val_rtx, | |
4118 | dest_align, expected_align, | |
9db0f34d | 4119 | expected_size, min_size, max_size, |
4120 | probable_max_size)) | |
6b961939 | 4121 | goto do_libcall; |
48e1416a | 4122 | |
c2f47e15 | 4123 | dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX); |
4124 | dest_mem = convert_memory_address (ptr_mode, dest_mem); | |
4125 | return dest_mem; | |
4126 | } | |
53800dbe | 4127 | |
c2f47e15 | 4128 | if (target_char_cast (val, &c)) |
4129 | goto do_libcall; | |
ecc318ff | 4130 | |
c2f47e15 | 4131 | if (c) |
4132 | { | |
e913b5cd | 4133 | if (tree_fits_uhwi_p (len) |
4134 | && can_store_by_pieces (tree_to_uhwi (len), | |
4b297e2e | 4135 | builtin_memset_read_str, &c, dest_align, |
4136 | true)) | |
e913b5cd | 4137 | store_by_pieces (dest_mem, tree_to_uhwi (len), |
4b297e2e | 4138 | builtin_memset_read_str, &c, dest_align, true, 0); |
03a5dda9 | 4139 | else if (!set_storage_via_setmem (dest_mem, len_rtx, |
4140 | gen_int_mode (c, val_mode), | |
c2f47e15 | 4141 | dest_align, expected_align, |
9db0f34d | 4142 | expected_size, min_size, max_size, |
4143 | probable_max_size)) | |
c2f47e15 | 4144 | goto do_libcall; |
48e1416a | 4145 | |
c2f47e15 | 4146 | dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX); |
4147 | dest_mem = convert_memory_address (ptr_mode, dest_mem); | |
4148 | return dest_mem; | |
4149 | } | |
ecc318ff | 4150 | |
c2f47e15 | 4151 | set_mem_align (dest_mem, dest_align); |
4152 | dest_addr = clear_storage_hints (dest_mem, len_rtx, | |
4153 | CALL_EXPR_TAILCALL (orig_exp) | |
4154 | ? BLOCK_OP_TAILCALL : BLOCK_OP_NORMAL, | |
36d63243 | 4155 | expected_align, expected_size, |
9db0f34d | 4156 | min_size, max_size, |
4157 | probable_max_size); | |
53800dbe | 4158 | |
c2f47e15 | 4159 | if (dest_addr == 0) |
4160 | { | |
4161 | dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX); | |
4162 | dest_addr = convert_memory_address (ptr_mode, dest_addr); | |
4163 | } | |
53800dbe | 4164 | |
c2f47e15 | 4165 | return dest_addr; |
6b961939 | 4166 | |
c2f47e15 | 4167 | do_libcall: |
4168 | fndecl = get_callee_fndecl (orig_exp); | |
4169 | fcode = DECL_FUNCTION_CODE (fndecl); | |
f21337ef | 4170 | if (fcode == BUILT_IN_MEMSET |
4171 | || fcode == BUILT_IN_CHKP_MEMSET_NOBND_NOCHK_CHKP) | |
0568e9c1 | 4172 | fn = build_call_nofold_loc (EXPR_LOCATION (orig_exp), fndecl, 3, |
4173 | dest, val, len); | |
c2f47e15 | 4174 | else if (fcode == BUILT_IN_BZERO) |
0568e9c1 | 4175 | fn = build_call_nofold_loc (EXPR_LOCATION (orig_exp), fndecl, 2, |
4176 | dest, len); | |
c2f47e15 | 4177 | else |
4178 | gcc_unreachable (); | |
a65c4d64 | 4179 | gcc_assert (TREE_CODE (fn) == CALL_EXPR); |
4180 | CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (orig_exp); | |
c2f47e15 | 4181 | return expand_call (fn, target, target == const0_rtx); |
53800dbe | 4182 | } |
4183 | ||
48e1416a | 4184 | /* Expand expression EXP, which is a call to the bzero builtin. Return |
c2f47e15 | 4185 | NULL_RTX if we failed the caller should emit a normal call. */ |
27d0c333 | 4186 | |
ffc83088 | 4187 | static rtx |
0b25db21 | 4188 | expand_builtin_bzero (tree exp) |
ffc83088 | 4189 | { |
c2f47e15 | 4190 | if (!validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
7369e7ba | 4191 | return NULL_RTX; |
ffc83088 | 4192 | |
5aef8938 | 4193 | tree dest = CALL_EXPR_ARG (exp, 0); |
4194 | tree size = CALL_EXPR_ARG (exp, 1); | |
4195 | ||
8d6c6ef5 | 4196 | check_memop_sizes (exp, dest, NULL_TREE, size); |
bf8e3599 | 4197 | |
7369e7ba | 4198 | /* New argument list transforming bzero(ptr x, int y) to |
6f428e8b | 4199 | memset(ptr x, int 0, size_t y). This is done this way |
4200 | so that if it isn't expanded inline, we fallback to | |
4201 | calling bzero instead of memset. */ | |
bf8e3599 | 4202 | |
5aef8938 | 4203 | location_t loc = EXPR_LOCATION (exp); |
4204 | ||
c2f47e15 | 4205 | return expand_builtin_memset_args (dest, integer_zero_node, |
a0553bff | 4206 | fold_convert_loc (loc, |
4207 | size_type_node, size), | |
c2f47e15 | 4208 | const0_rtx, VOIDmode, exp); |
ffc83088 | 4209 | } |
4210 | ||
d6f01a40 | 4211 | /* Try to expand cmpstr operation ICODE with the given operands. |
4212 | Return the result rtx on success, otherwise return null. */ | |
4213 | ||
4214 | static rtx | |
4215 | expand_cmpstr (insn_code icode, rtx target, rtx arg1_rtx, rtx arg2_rtx, | |
4216 | HOST_WIDE_INT align) | |
4217 | { | |
4218 | machine_mode insn_mode = insn_data[icode].operand[0].mode; | |
4219 | ||
4220 | if (target && (!REG_P (target) || HARD_REGISTER_P (target))) | |
4221 | target = NULL_RTX; | |
4222 | ||
4223 | struct expand_operand ops[4]; | |
4224 | create_output_operand (&ops[0], target, insn_mode); | |
4225 | create_fixed_operand (&ops[1], arg1_rtx); | |
4226 | create_fixed_operand (&ops[2], arg2_rtx); | |
4227 | create_integer_operand (&ops[3], align); | |
4228 | if (maybe_expand_insn (icode, 4, ops)) | |
4229 | return ops[0].value; | |
4230 | return NULL_RTX; | |
4231 | } | |
4232 | ||
7a3f89b5 | 4233 | /* Expand expression EXP, which is a call to the memcmp built-in function. |
bd021c1c | 4234 | Return NULL_RTX if we failed and the caller should emit a normal call, |
3e346f54 | 4235 | otherwise try to get the result in TARGET, if convenient. |
4236 | RESULT_EQ is true if we can relax the returned value to be either zero | |
4237 | or nonzero, without caring about the sign. */ | |
27d0c333 | 4238 | |
53800dbe | 4239 | static rtx |
3e346f54 | 4240 | expand_builtin_memcmp (tree exp, rtx target, bool result_eq) |
53800dbe | 4241 | { |
c2f47e15 | 4242 | if (!validate_arglist (exp, |
4243 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
4244 | return NULL_RTX; | |
6f428e8b | 4245 | |
ea368aac | 4246 | tree arg1 = CALL_EXPR_ARG (exp, 0); |
4247 | tree arg2 = CALL_EXPR_ARG (exp, 1); | |
4248 | tree len = CALL_EXPR_ARG (exp, 2); | |
8d6c6ef5 | 4249 | |
4250 | /* Diagnose calls where the specified length exceeds the size of either | |
4251 | object. */ | |
4252 | if (warn_stringop_overflow) | |
4253 | { | |
4254 | tree size = compute_objsize (arg1, 0); | |
4255 | if (check_sizes (OPT_Wstringop_overflow_, | |
4256 | exp, len, /*maxlen=*/NULL_TREE, | |
4257 | size, /*objsize=*/NULL_TREE)) | |
4258 | { | |
4259 | size = compute_objsize (arg2, 0); | |
4260 | check_sizes (OPT_Wstringop_overflow_, | |
4261 | exp, len, /*maxlen=*/NULL_TREE, | |
4262 | size, /*objsize=*/NULL_TREE); | |
4263 | } | |
4264 | } | |
4265 | ||
3e346f54 | 4266 | machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); |
4267 | location_t loc = EXPR_LOCATION (exp); | |
b428c0a5 | 4268 | |
ea368aac | 4269 | unsigned int arg1_align = get_pointer_alignment (arg1) / BITS_PER_UNIT; |
4270 | unsigned int arg2_align = get_pointer_alignment (arg2) / BITS_PER_UNIT; | |
53800dbe | 4271 | |
ea368aac | 4272 | /* If we don't have POINTER_TYPE, call the function. */ |
4273 | if (arg1_align == 0 || arg2_align == 0) | |
4274 | return NULL_RTX; | |
53800dbe | 4275 | |
ea368aac | 4276 | rtx arg1_rtx = get_memory_rtx (arg1, len); |
4277 | rtx arg2_rtx = get_memory_rtx (arg2, len); | |
3e346f54 | 4278 | rtx len_rtx = expand_normal (fold_convert_loc (loc, sizetype, len)); |
53800dbe | 4279 | |
ea368aac | 4280 | /* Set MEM_SIZE as appropriate. */ |
3e346f54 | 4281 | if (CONST_INT_P (len_rtx)) |
ea368aac | 4282 | { |
3e346f54 | 4283 | set_mem_size (arg1_rtx, INTVAL (len_rtx)); |
4284 | set_mem_size (arg2_rtx, INTVAL (len_rtx)); | |
ea368aac | 4285 | } |
83f88f8e | 4286 | |
3e346f54 | 4287 | by_pieces_constfn constfn = NULL; |
4288 | ||
719f3058 | 4289 | const char *src_str = c_getstr (arg2); |
4290 | if (result_eq && src_str == NULL) | |
4291 | { | |
4292 | src_str = c_getstr (arg1); | |
4293 | if (src_str != NULL) | |
092db747 | 4294 | std::swap (arg1_rtx, arg2_rtx); |
719f3058 | 4295 | } |
3e346f54 | 4296 | |
4297 | /* If SRC is a string constant and block move would be done | |
4298 | by pieces, we can avoid loading the string from memory | |
4299 | and only stored the computed constants. */ | |
4300 | if (src_str | |
4301 | && CONST_INT_P (len_rtx) | |
4302 | && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1) | |
4303 | constfn = builtin_memcpy_read_str; | |
4304 | ||
4305 | rtx result = emit_block_cmp_hints (arg1_rtx, arg2_rtx, len_rtx, | |
4306 | TREE_TYPE (len), target, | |
4307 | result_eq, constfn, | |
4308 | CONST_CAST (char *, src_str)); | |
4309 | ||
ea368aac | 4310 | if (result) |
4311 | { | |
4312 | /* Return the value in the proper mode for this function. */ | |
4313 | if (GET_MODE (result) == mode) | |
4314 | return result; | |
83f88f8e | 4315 | |
ea368aac | 4316 | if (target != 0) |
4317 | { | |
4318 | convert_move (target, result, 0); | |
4319 | return target; | |
4320 | } | |
0cd832f0 | 4321 | |
53800dbe | 4322 | return convert_to_mode (mode, result, 0); |
ea368aac | 4323 | } |
53800dbe | 4324 | |
61ffc71a | 4325 | return NULL_RTX; |
6f428e8b | 4326 | } |
4327 | ||
c2f47e15 | 4328 | /* Expand expression EXP, which is a call to the strcmp builtin. Return NULL_RTX |
53800dbe | 4329 | if we failed the caller should emit a normal call, otherwise try to get |
4330 | the result in TARGET, if convenient. */ | |
902de8ed | 4331 | |
53800dbe | 4332 | static rtx |
a65c4d64 | 4333 | expand_builtin_strcmp (tree exp, ATTRIBUTE_UNUSED rtx target) |
53800dbe | 4334 | { |
c2f47e15 | 4335 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
4336 | return NULL_RTX; | |
bf8e3599 | 4337 | |
d6f01a40 | 4338 | insn_code cmpstr_icode = direct_optab_handler (cmpstr_optab, SImode); |
4339 | insn_code cmpstrn_icode = direct_optab_handler (cmpstrn_optab, SImode); | |
4340 | if (cmpstr_icode != CODE_FOR_nothing || cmpstrn_icode != CODE_FOR_nothing) | |
6ac5504b | 4341 | { |
4342 | rtx arg1_rtx, arg2_rtx; | |
6ac5504b | 4343 | tree fndecl, fn; |
c2f47e15 | 4344 | tree arg1 = CALL_EXPR_ARG (exp, 0); |
4345 | tree arg2 = CALL_EXPR_ARG (exp, 1); | |
d6f01a40 | 4346 | rtx result = NULL_RTX; |
a0c938f0 | 4347 | |
957d0361 | 4348 | unsigned int arg1_align = get_pointer_alignment (arg1) / BITS_PER_UNIT; |
4349 | unsigned int arg2_align = get_pointer_alignment (arg2) / BITS_PER_UNIT; | |
6ac5504b | 4350 | |
4351 | /* If we don't have POINTER_TYPE, call the function. */ | |
4352 | if (arg1_align == 0 || arg2_align == 0) | |
c2f47e15 | 4353 | return NULL_RTX; |
7a3f89b5 | 4354 | |
6ac5504b | 4355 | /* Stabilize the arguments in case gen_cmpstr(n)si fail. */ |
4356 | arg1 = builtin_save_expr (arg1); | |
4357 | arg2 = builtin_save_expr (arg2); | |
7a3f89b5 | 4358 | |
d8ae1baa | 4359 | arg1_rtx = get_memory_rtx (arg1, NULL); |
4360 | arg2_rtx = get_memory_rtx (arg2, NULL); | |
53800dbe | 4361 | |
6ac5504b | 4362 | /* Try to call cmpstrsi. */ |
d6f01a40 | 4363 | if (cmpstr_icode != CODE_FOR_nothing) |
4364 | result = expand_cmpstr (cmpstr_icode, target, arg1_rtx, arg2_rtx, | |
4365 | MIN (arg1_align, arg2_align)); | |
4366 | ||
6ac5504b | 4367 | /* Try to determine at least one length and call cmpstrnsi. */ |
d6f01a40 | 4368 | if (!result && cmpstrn_icode != CODE_FOR_nothing) |
6ac5504b | 4369 | { |
4370 | tree len; | |
4371 | rtx arg3_rtx; | |
4372 | ||
6ac5504b | 4373 | tree len1 = c_strlen (arg1, 1); |
4374 | tree len2 = c_strlen (arg2, 1); | |
4375 | ||
4376 | if (len1) | |
4377 | len1 = size_binop (PLUS_EXPR, ssize_int (1), len1); | |
4378 | if (len2) | |
4379 | len2 = size_binop (PLUS_EXPR, ssize_int (1), len2); | |
4380 | ||
4381 | /* If we don't have a constant length for the first, use the length | |
4382 | of the second, if we know it. We don't require a constant for | |
4383 | this case; some cost analysis could be done if both are available | |
4384 | but neither is constant. For now, assume they're equally cheap, | |
4385 | unless one has side effects. If both strings have constant lengths, | |
4386 | use the smaller. */ | |
4387 | ||
4388 | if (!len1) | |
4389 | len = len2; | |
4390 | else if (!len2) | |
4391 | len = len1; | |
4392 | else if (TREE_SIDE_EFFECTS (len1)) | |
4393 | len = len2; | |
4394 | else if (TREE_SIDE_EFFECTS (len2)) | |
4395 | len = len1; | |
4396 | else if (TREE_CODE (len1) != INTEGER_CST) | |
4397 | len = len2; | |
4398 | else if (TREE_CODE (len2) != INTEGER_CST) | |
4399 | len = len1; | |
4400 | else if (tree_int_cst_lt (len1, len2)) | |
4401 | len = len1; | |
4402 | else | |
4403 | len = len2; | |
4404 | ||
4405 | /* If both arguments have side effects, we cannot optimize. */ | |
d6f01a40 | 4406 | if (len && !TREE_SIDE_EFFECTS (len)) |
4407 | { | |
4408 | arg3_rtx = expand_normal (len); | |
ea368aac | 4409 | result = expand_cmpstrn_or_cmpmem |
4410 | (cmpstrn_icode, target, arg1_rtx, arg2_rtx, TREE_TYPE (len), | |
4411 | arg3_rtx, MIN (arg1_align, arg2_align)); | |
d6f01a40 | 4412 | } |
6ac5504b | 4413 | } |
3f8aefe2 | 4414 | |
d6f01a40 | 4415 | if (result) |
6ac5504b | 4416 | { |
6ac5504b | 4417 | /* Return the value in the proper mode for this function. */ |
d6f01a40 | 4418 | machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); |
6ac5504b | 4419 | if (GET_MODE (result) == mode) |
4420 | return result; | |
4421 | if (target == 0) | |
4422 | return convert_to_mode (mode, result, 0); | |
4423 | convert_move (target, result, 0); | |
4424 | return target; | |
4425 | } | |
902de8ed | 4426 | |
6ac5504b | 4427 | /* Expand the library call ourselves using a stabilized argument |
4428 | list to avoid re-evaluating the function's arguments twice. */ | |
6ac5504b | 4429 | fndecl = get_callee_fndecl (exp); |
0568e9c1 | 4430 | fn = build_call_nofold_loc (EXPR_LOCATION (exp), fndecl, 2, arg1, arg2); |
a65c4d64 | 4431 | gcc_assert (TREE_CODE (fn) == CALL_EXPR); |
4432 | CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp); | |
6ac5504b | 4433 | return expand_call (fn, target, target == const0_rtx); |
4434 | } | |
c2f47e15 | 4435 | return NULL_RTX; |
83d79705 | 4436 | } |
53800dbe | 4437 | |
48e1416a | 4438 | /* Expand expression EXP, which is a call to the strncmp builtin. Return |
c2f47e15 | 4439 | NULL_RTX if we failed the caller should emit a normal call, otherwise try to get |
ed09096d | 4440 | the result in TARGET, if convenient. */ |
27d0c333 | 4441 | |
ed09096d | 4442 | static rtx |
a65c4d64 | 4443 | expand_builtin_strncmp (tree exp, ATTRIBUTE_UNUSED rtx target, |
3754d046 | 4444 | ATTRIBUTE_UNUSED machine_mode mode) |
ed09096d | 4445 | { |
a65c4d64 | 4446 | location_t loc ATTRIBUTE_UNUSED = EXPR_LOCATION (exp); |
389dd41b | 4447 | |
c2f47e15 | 4448 | if (!validate_arglist (exp, |
4449 | POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
4450 | return NULL_RTX; | |
ed09096d | 4451 | |
6e34e617 | 4452 | /* If c_strlen can determine an expression for one of the string |
6ac5504b | 4453 | lengths, and it doesn't have side effects, then emit cmpstrnsi |
7a3f89b5 | 4454 | using length MIN(strlen(string)+1, arg3). */ |
d6f01a40 | 4455 | insn_code cmpstrn_icode = direct_optab_handler (cmpstrn_optab, SImode); |
4456 | if (cmpstrn_icode != CODE_FOR_nothing) | |
7a3f89b5 | 4457 | { |
175cdef4 | 4458 | tree len, len1, len2, len3; |
7a3f89b5 | 4459 | rtx arg1_rtx, arg2_rtx, arg3_rtx; |
d6f01a40 | 4460 | rtx result; |
0b25db21 | 4461 | tree fndecl, fn; |
c2f47e15 | 4462 | tree arg1 = CALL_EXPR_ARG (exp, 0); |
4463 | tree arg2 = CALL_EXPR_ARG (exp, 1); | |
4464 | tree arg3 = CALL_EXPR_ARG (exp, 2); | |
6f428e8b | 4465 | |
957d0361 | 4466 | unsigned int arg1_align = get_pointer_alignment (arg1) / BITS_PER_UNIT; |
4467 | unsigned int arg2_align = get_pointer_alignment (arg2) / BITS_PER_UNIT; | |
bf8e3599 | 4468 | |
681fab1e | 4469 | len1 = c_strlen (arg1, 1); |
4470 | len2 = c_strlen (arg2, 1); | |
7a3f89b5 | 4471 | |
4472 | if (len1) | |
389dd41b | 4473 | len1 = size_binop_loc (loc, PLUS_EXPR, ssize_int (1), len1); |
7a3f89b5 | 4474 | if (len2) |
389dd41b | 4475 | len2 = size_binop_loc (loc, PLUS_EXPR, ssize_int (1), len2); |
7a3f89b5 | 4476 | |
175cdef4 | 4477 | len3 = fold_convert_loc (loc, sizetype, arg3); |
4478 | ||
7a3f89b5 | 4479 | /* If we don't have a constant length for the first, use the length |
175cdef4 | 4480 | of the second, if we know it. If neither string is constant length, |
4481 | use the given length argument. We don't require a constant for | |
7a3f89b5 | 4482 | this case; some cost analysis could be done if both are available |
4483 | but neither is constant. For now, assume they're equally cheap, | |
4484 | unless one has side effects. If both strings have constant lengths, | |
4485 | use the smaller. */ | |
4486 | ||
175cdef4 | 4487 | if (!len1 && !len2) |
4488 | len = len3; | |
4489 | else if (!len1) | |
7a3f89b5 | 4490 | len = len2; |
4491 | else if (!len2) | |
4492 | len = len1; | |
4493 | else if (TREE_SIDE_EFFECTS (len1)) | |
4494 | len = len2; | |
4495 | else if (TREE_SIDE_EFFECTS (len2)) | |
4496 | len = len1; | |
4497 | else if (TREE_CODE (len1) != INTEGER_CST) | |
4498 | len = len2; | |
4499 | else if (TREE_CODE (len2) != INTEGER_CST) | |
4500 | len = len1; | |
4501 | else if (tree_int_cst_lt (len1, len2)) | |
4502 | len = len1; | |
4503 | else | |
4504 | len = len2; | |
6e34e617 | 4505 | |
175cdef4 | 4506 | /* If we are not using the given length, we must incorporate it here. |
4507 | The actual new length parameter will be MIN(len,arg3) in this case. */ | |
4508 | if (len != len3) | |
4509 | len = fold_build2_loc (loc, MIN_EXPR, TREE_TYPE (len), len, len3); | |
a65c4d64 | 4510 | arg1_rtx = get_memory_rtx (arg1, len); |
4511 | arg2_rtx = get_memory_rtx (arg2, len); | |
4512 | arg3_rtx = expand_normal (len); | |
ea368aac | 4513 | result = expand_cmpstrn_or_cmpmem (cmpstrn_icode, target, arg1_rtx, |
4514 | arg2_rtx, TREE_TYPE (len), arg3_rtx, | |
4515 | MIN (arg1_align, arg2_align)); | |
d6f01a40 | 4516 | if (result) |
a65c4d64 | 4517 | { |
a65c4d64 | 4518 | /* Return the value in the proper mode for this function. */ |
4519 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
4520 | if (GET_MODE (result) == mode) | |
4521 | return result; | |
4522 | if (target == 0) | |
4523 | return convert_to_mode (mode, result, 0); | |
4524 | convert_move (target, result, 0); | |
4525 | return target; | |
4526 | } | |
27d0c333 | 4527 | |
a65c4d64 | 4528 | /* Expand the library call ourselves using a stabilized argument |
4529 | list to avoid re-evaluating the function's arguments twice. */ | |
4530 | fndecl = get_callee_fndecl (exp); | |
0568e9c1 | 4531 | fn = build_call_nofold_loc (EXPR_LOCATION (exp), fndecl, 3, |
4532 | arg1, arg2, len); | |
a65c4d64 | 4533 | gcc_assert (TREE_CODE (fn) == CALL_EXPR); |
4534 | CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp); | |
4535 | return expand_call (fn, target, target == const0_rtx); | |
4536 | } | |
c2f47e15 | 4537 | return NULL_RTX; |
49f0327b | 4538 | } |
4539 | ||
a66c9326 | 4540 | /* Expand a call to __builtin_saveregs, generating the result in TARGET, |
4541 | if that's convenient. */ | |
902de8ed | 4542 | |
a66c9326 | 4543 | rtx |
aecda0d6 | 4544 | expand_builtin_saveregs (void) |
53800dbe | 4545 | { |
1e0c0b35 | 4546 | rtx val; |
4547 | rtx_insn *seq; | |
53800dbe | 4548 | |
4549 | /* Don't do __builtin_saveregs more than once in a function. | |
4550 | Save the result of the first call and reuse it. */ | |
4551 | if (saveregs_value != 0) | |
4552 | return saveregs_value; | |
53800dbe | 4553 | |
a66c9326 | 4554 | /* When this function is called, it means that registers must be |
4555 | saved on entry to this function. So we migrate the call to the | |
4556 | first insn of this function. */ | |
4557 | ||
4558 | start_sequence (); | |
53800dbe | 4559 | |
a66c9326 | 4560 | /* Do whatever the machine needs done in this case. */ |
45550790 | 4561 | val = targetm.calls.expand_builtin_saveregs (); |
53800dbe | 4562 | |
a66c9326 | 4563 | seq = get_insns (); |
4564 | end_sequence (); | |
53800dbe | 4565 | |
a66c9326 | 4566 | saveregs_value = val; |
53800dbe | 4567 | |
31d3e01c | 4568 | /* Put the insns after the NOTE that starts the function. If this |
4569 | is inside a start_sequence, make the outer-level insn chain current, so | |
a66c9326 | 4570 | the code is placed at the start of the function. */ |
4571 | push_topmost_sequence (); | |
0ec80471 | 4572 | emit_insn_after (seq, entry_of_function ()); |
a66c9326 | 4573 | pop_topmost_sequence (); |
4574 | ||
4575 | return val; | |
53800dbe | 4576 | } |
4577 | ||
79012a9d | 4578 | /* Expand a call to __builtin_next_arg. */ |
27d0c333 | 4579 | |
53800dbe | 4580 | static rtx |
79012a9d | 4581 | expand_builtin_next_arg (void) |
53800dbe | 4582 | { |
79012a9d | 4583 | /* Checking arguments is already done in fold_builtin_next_arg |
4584 | that must be called before this function. */ | |
940ddc5c | 4585 | return expand_binop (ptr_mode, add_optab, |
abe32cce | 4586 | crtl->args.internal_arg_pointer, |
4587 | crtl->args.arg_offset_rtx, | |
53800dbe | 4588 | NULL_RTX, 0, OPTAB_LIB_WIDEN); |
4589 | } | |
4590 | ||
a66c9326 | 4591 | /* Make it easier for the backends by protecting the valist argument |
4592 | from multiple evaluations. */ | |
4593 | ||
4594 | static tree | |
389dd41b | 4595 | stabilize_va_list_loc (location_t loc, tree valist, int needs_lvalue) |
a66c9326 | 4596 | { |
5f57a8b1 | 4597 | tree vatype = targetm.canonical_va_list_type (TREE_TYPE (valist)); |
4598 | ||
182cf5a9 | 4599 | /* The current way of determining the type of valist is completely |
4600 | bogus. We should have the information on the va builtin instead. */ | |
4601 | if (!vatype) | |
4602 | vatype = targetm.fn_abi_va_list (cfun->decl); | |
5f57a8b1 | 4603 | |
4604 | if (TREE_CODE (vatype) == ARRAY_TYPE) | |
a66c9326 | 4605 | { |
2d47cc32 | 4606 | if (TREE_SIDE_EFFECTS (valist)) |
4607 | valist = save_expr (valist); | |
11a61dea | 4608 | |
2d47cc32 | 4609 | /* For this case, the backends will be expecting a pointer to |
5f57a8b1 | 4610 | vatype, but it's possible we've actually been given an array |
4611 | (an actual TARGET_CANONICAL_VA_LIST_TYPE (valist)). | |
2d47cc32 | 4612 | So fix it. */ |
4613 | if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE) | |
8a15c04a | 4614 | { |
5f57a8b1 | 4615 | tree p1 = build_pointer_type (TREE_TYPE (vatype)); |
389dd41b | 4616 | valist = build_fold_addr_expr_with_type_loc (loc, valist, p1); |
8a15c04a | 4617 | } |
a66c9326 | 4618 | } |
11a61dea | 4619 | else |
a66c9326 | 4620 | { |
182cf5a9 | 4621 | tree pt = build_pointer_type (vatype); |
11a61dea | 4622 | |
2d47cc32 | 4623 | if (! needs_lvalue) |
4624 | { | |
11a61dea | 4625 | if (! TREE_SIDE_EFFECTS (valist)) |
4626 | return valist; | |
bf8e3599 | 4627 | |
389dd41b | 4628 | valist = fold_build1_loc (loc, ADDR_EXPR, pt, valist); |
a66c9326 | 4629 | TREE_SIDE_EFFECTS (valist) = 1; |
a66c9326 | 4630 | } |
2d47cc32 | 4631 | |
11a61dea | 4632 | if (TREE_SIDE_EFFECTS (valist)) |
2d47cc32 | 4633 | valist = save_expr (valist); |
182cf5a9 | 4634 | valist = fold_build2_loc (loc, MEM_REF, |
4635 | vatype, valist, build_int_cst (pt, 0)); | |
a66c9326 | 4636 | } |
4637 | ||
4638 | return valist; | |
4639 | } | |
4640 | ||
2e15d750 | 4641 | /* The "standard" definition of va_list is void*. */ |
4642 | ||
4643 | tree | |
4644 | std_build_builtin_va_list (void) | |
4645 | { | |
4646 | return ptr_type_node; | |
4647 | } | |
4648 | ||
5f57a8b1 | 4649 | /* The "standard" abi va_list is va_list_type_node. */ |
4650 | ||
4651 | tree | |
4652 | std_fn_abi_va_list (tree fndecl ATTRIBUTE_UNUSED) | |
4653 | { | |
4654 | return va_list_type_node; | |
4655 | } | |
4656 | ||
4657 | /* The "standard" type of va_list is va_list_type_node. */ | |
4658 | ||
4659 | tree | |
4660 | std_canonical_va_list_type (tree type) | |
4661 | { | |
4662 | tree wtype, htype; | |
4663 | ||
5f57a8b1 | 4664 | wtype = va_list_type_node; |
4665 | htype = type; | |
b6da2e41 | 4666 | |
4667 | if (TREE_CODE (wtype) == ARRAY_TYPE) | |
5f57a8b1 | 4668 | { |
4669 | /* If va_list is an array type, the argument may have decayed | |
4670 | to a pointer type, e.g. by being passed to another function. | |
4671 | In that case, unwrap both types so that we can compare the | |
4672 | underlying records. */ | |
4673 | if (TREE_CODE (htype) == ARRAY_TYPE | |
4674 | || POINTER_TYPE_P (htype)) | |
4675 | { | |
4676 | wtype = TREE_TYPE (wtype); | |
4677 | htype = TREE_TYPE (htype); | |
4678 | } | |
4679 | } | |
4680 | if (TYPE_MAIN_VARIANT (wtype) == TYPE_MAIN_VARIANT (htype)) | |
4681 | return va_list_type_node; | |
4682 | ||
4683 | return NULL_TREE; | |
4684 | } | |
4685 | ||
a66c9326 | 4686 | /* The "standard" implementation of va_start: just assign `nextarg' to |
4687 | the variable. */ | |
27d0c333 | 4688 | |
a66c9326 | 4689 | void |
aecda0d6 | 4690 | std_expand_builtin_va_start (tree valist, rtx nextarg) |
a66c9326 | 4691 | { |
f03c17bc | 4692 | rtx va_r = expand_expr (valist, NULL_RTX, VOIDmode, EXPAND_WRITE); |
4693 | convert_move (va_r, nextarg, 0); | |
058a1b7a | 4694 | |
4695 | /* We do not have any valid bounds for the pointer, so | |
4696 | just store zero bounds for it. */ | |
4697 | if (chkp_function_instrumented_p (current_function_decl)) | |
4698 | chkp_expand_bounds_reset_for_mem (valist, | |
4699 | make_tree (TREE_TYPE (valist), | |
4700 | nextarg)); | |
a66c9326 | 4701 | } |
4702 | ||
c2f47e15 | 4703 | /* Expand EXP, a call to __builtin_va_start. */ |
27d0c333 | 4704 | |
a66c9326 | 4705 | static rtx |
c2f47e15 | 4706 | expand_builtin_va_start (tree exp) |
a66c9326 | 4707 | { |
4708 | rtx nextarg; | |
c2f47e15 | 4709 | tree valist; |
389dd41b | 4710 | location_t loc = EXPR_LOCATION (exp); |
a66c9326 | 4711 | |
c2f47e15 | 4712 | if (call_expr_nargs (exp) < 2) |
cb166087 | 4713 | { |
389dd41b | 4714 | error_at (loc, "too few arguments to function %<va_start%>"); |
cb166087 | 4715 | return const0_rtx; |
4716 | } | |
a66c9326 | 4717 | |
c2f47e15 | 4718 | if (fold_builtin_next_arg (exp, true)) |
79012a9d | 4719 | return const0_rtx; |
7c2f0500 | 4720 | |
79012a9d | 4721 | nextarg = expand_builtin_next_arg (); |
389dd41b | 4722 | valist = stabilize_va_list_loc (loc, CALL_EXPR_ARG (exp, 0), 1); |
a66c9326 | 4723 | |
8a58ed0a | 4724 | if (targetm.expand_builtin_va_start) |
4725 | targetm.expand_builtin_va_start (valist, nextarg); | |
4726 | else | |
4727 | std_expand_builtin_va_start (valist, nextarg); | |
a66c9326 | 4728 | |
4729 | return const0_rtx; | |
4730 | } | |
4731 | ||
c2f47e15 | 4732 | /* Expand EXP, a call to __builtin_va_end. */ |
f7c44134 | 4733 | |
a66c9326 | 4734 | static rtx |
c2f47e15 | 4735 | expand_builtin_va_end (tree exp) |
a66c9326 | 4736 | { |
c2f47e15 | 4737 | tree valist = CALL_EXPR_ARG (exp, 0); |
8a15c04a | 4738 | |
8a15c04a | 4739 | /* Evaluate for side effects, if needed. I hate macros that don't |
4740 | do that. */ | |
4741 | if (TREE_SIDE_EFFECTS (valist)) | |
4742 | expand_expr (valist, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
a66c9326 | 4743 | |
4744 | return const0_rtx; | |
4745 | } | |
4746 | ||
c2f47e15 | 4747 | /* Expand EXP, a call to __builtin_va_copy. We do this as a |
a66c9326 | 4748 | builtin rather than just as an assignment in stdarg.h because of the |
4749 | nastiness of array-type va_list types. */ | |
f7c44134 | 4750 | |
a66c9326 | 4751 | static rtx |
c2f47e15 | 4752 | expand_builtin_va_copy (tree exp) |
a66c9326 | 4753 | { |
4754 | tree dst, src, t; | |
389dd41b | 4755 | location_t loc = EXPR_LOCATION (exp); |
a66c9326 | 4756 | |
c2f47e15 | 4757 | dst = CALL_EXPR_ARG (exp, 0); |
4758 | src = CALL_EXPR_ARG (exp, 1); | |
a66c9326 | 4759 | |
389dd41b | 4760 | dst = stabilize_va_list_loc (loc, dst, 1); |
4761 | src = stabilize_va_list_loc (loc, src, 0); | |
a66c9326 | 4762 | |
5f57a8b1 | 4763 | gcc_assert (cfun != NULL && cfun->decl != NULL_TREE); |
4764 | ||
4765 | if (TREE_CODE (targetm.fn_abi_va_list (cfun->decl)) != ARRAY_TYPE) | |
a66c9326 | 4766 | { |
5f57a8b1 | 4767 | t = build2 (MODIFY_EXPR, targetm.fn_abi_va_list (cfun->decl), dst, src); |
a66c9326 | 4768 | TREE_SIDE_EFFECTS (t) = 1; |
4769 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
4770 | } | |
4771 | else | |
4772 | { | |
11a61dea | 4773 | rtx dstb, srcb, size; |
4774 | ||
4775 | /* Evaluate to pointers. */ | |
4776 | dstb = expand_expr (dst, NULL_RTX, Pmode, EXPAND_NORMAL); | |
4777 | srcb = expand_expr (src, NULL_RTX, Pmode, EXPAND_NORMAL); | |
5f57a8b1 | 4778 | size = expand_expr (TYPE_SIZE_UNIT (targetm.fn_abi_va_list (cfun->decl)), |
4779 | NULL_RTX, VOIDmode, EXPAND_NORMAL); | |
11a61dea | 4780 | |
85d654dd | 4781 | dstb = convert_memory_address (Pmode, dstb); |
4782 | srcb = convert_memory_address (Pmode, srcb); | |
726ec87c | 4783 | |
11a61dea | 4784 | /* "Dereference" to BLKmode memories. */ |
4785 | dstb = gen_rtx_MEM (BLKmode, dstb); | |
ab6ab77e | 4786 | set_mem_alias_set (dstb, get_alias_set (TREE_TYPE (TREE_TYPE (dst)))); |
5f57a8b1 | 4787 | set_mem_align (dstb, TYPE_ALIGN (targetm.fn_abi_va_list (cfun->decl))); |
11a61dea | 4788 | srcb = gen_rtx_MEM (BLKmode, srcb); |
ab6ab77e | 4789 | set_mem_alias_set (srcb, get_alias_set (TREE_TYPE (TREE_TYPE (src)))); |
5f57a8b1 | 4790 | set_mem_align (srcb, TYPE_ALIGN (targetm.fn_abi_va_list (cfun->decl))); |
11a61dea | 4791 | |
4792 | /* Copy. */ | |
0378dbdc | 4793 | emit_block_move (dstb, srcb, size, BLOCK_OP_NORMAL); |
a66c9326 | 4794 | } |
4795 | ||
4796 | return const0_rtx; | |
4797 | } | |
4798 | ||
53800dbe | 4799 | /* Expand a call to one of the builtin functions __builtin_frame_address or |
4800 | __builtin_return_address. */ | |
27d0c333 | 4801 | |
53800dbe | 4802 | static rtx |
c2f47e15 | 4803 | expand_builtin_frame_address (tree fndecl, tree exp) |
53800dbe | 4804 | { |
53800dbe | 4805 | /* The argument must be a nonnegative integer constant. |
4806 | It counts the number of frames to scan up the stack. | |
5b252e95 | 4807 | The value is either the frame pointer value or the return |
4808 | address saved in that frame. */ | |
c2f47e15 | 4809 | if (call_expr_nargs (exp) == 0) |
53800dbe | 4810 | /* Warning about missing arg was already issued. */ |
4811 | return const0_rtx; | |
e913b5cd | 4812 | else if (! tree_fits_uhwi_p (CALL_EXPR_ARG (exp, 0))) |
53800dbe | 4813 | { |
5b252e95 | 4814 | error ("invalid argument to %qD", fndecl); |
53800dbe | 4815 | return const0_rtx; |
4816 | } | |
4817 | else | |
4818 | { | |
5b252e95 | 4819 | /* Number of frames to scan up the stack. */ |
4820 | unsigned HOST_WIDE_INT count = tree_to_uhwi (CALL_EXPR_ARG (exp, 0)); | |
4821 | ||
4822 | rtx tem = expand_builtin_return_addr (DECL_FUNCTION_CODE (fndecl), count); | |
53800dbe | 4823 | |
4824 | /* Some ports cannot access arbitrary stack frames. */ | |
4825 | if (tem == NULL) | |
4826 | { | |
5b252e95 | 4827 | warning (0, "unsupported argument to %qD", fndecl); |
53800dbe | 4828 | return const0_rtx; |
4829 | } | |
4830 | ||
5b252e95 | 4831 | if (count) |
4832 | { | |
4833 | /* Warn since no effort is made to ensure that any frame | |
4834 | beyond the current one exists or can be safely reached. */ | |
4835 | warning (OPT_Wframe_address, "calling %qD with " | |
4836 | "a nonzero argument is unsafe", fndecl); | |
4837 | } | |
4838 | ||
53800dbe | 4839 | /* For __builtin_frame_address, return what we've got. */ |
4840 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
4841 | return tem; | |
4842 | ||
8ad4c111 | 4843 | if (!REG_P (tem) |
53800dbe | 4844 | && ! CONSTANT_P (tem)) |
99182918 | 4845 | tem = copy_addr_to_reg (tem); |
53800dbe | 4846 | return tem; |
4847 | } | |
4848 | } | |
4849 | ||
990495a7 | 4850 | /* Expand EXP, a call to the alloca builtin. Return NULL_RTX if we |
2b29cc6a | 4851 | failed and the caller should emit a normal call. */ |
15c6cf6b | 4852 | |
53800dbe | 4853 | static rtx |
2b29cc6a | 4854 | expand_builtin_alloca (tree exp) |
53800dbe | 4855 | { |
4856 | rtx op0; | |
15c6cf6b | 4857 | rtx result; |
581bf1c2 | 4858 | unsigned int align; |
370e45b9 | 4859 | tree fndecl = get_callee_fndecl (exp); |
4860 | bool alloca_with_align = (DECL_FUNCTION_CODE (fndecl) | |
581bf1c2 | 4861 | == BUILT_IN_ALLOCA_WITH_ALIGN); |
2b29cc6a | 4862 | bool alloca_for_var = CALL_ALLOCA_FOR_VAR_P (exp); |
370e45b9 | 4863 | bool valid_arglist |
581bf1c2 | 4864 | = (alloca_with_align |
4865 | ? validate_arglist (exp, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE) | |
4866 | : validate_arglist (exp, INTEGER_TYPE, VOID_TYPE)); | |
4867 | ||
4868 | if (!valid_arglist) | |
c2f47e15 | 4869 | return NULL_RTX; |
53800dbe | 4870 | |
370e45b9 | 4871 | if ((alloca_with_align && !warn_vla_limit) |
4872 | || (!alloca_with_align && !warn_alloca_limit)) | |
4873 | { | |
4874 | /* -Walloca-larger-than and -Wvla-larger-than settings override | |
4875 | the more general -Walloc-size-larger-than so unless either of | |
4876 | the former options is specified check the alloca arguments for | |
4877 | overflow. */ | |
4878 | tree args[] = { CALL_EXPR_ARG (exp, 0), NULL_TREE }; | |
4879 | int idx[] = { 0, -1 }; | |
4880 | maybe_warn_alloc_args_overflow (fndecl, exp, args, idx); | |
4881 | } | |
4882 | ||
53800dbe | 4883 | /* Compute the argument. */ |
c2f47e15 | 4884 | op0 = expand_normal (CALL_EXPR_ARG (exp, 0)); |
53800dbe | 4885 | |
581bf1c2 | 4886 | /* Compute the alignment. */ |
4887 | align = (alloca_with_align | |
f9ae6f95 | 4888 | ? TREE_INT_CST_LOW (CALL_EXPR_ARG (exp, 1)) |
581bf1c2 | 4889 | : BIGGEST_ALIGNMENT); |
4890 | ||
2b29cc6a | 4891 | /* Allocate the desired space. If the allocation stems from the declaration |
4892 | of a variable-sized object, it cannot accumulate. */ | |
4893 | result = allocate_dynamic_stack_space (op0, 0, align, alloca_for_var); | |
85d654dd | 4894 | result = convert_memory_address (ptr_mode, result); |
15c6cf6b | 4895 | |
4896 | return result; | |
53800dbe | 4897 | } |
4898 | ||
d08919a7 | 4899 | /* Emit a call to __asan_allocas_unpoison call in EXP. Replace second argument |
4900 | of the call with virtual_stack_dynamic_rtx because in asan pass we emit a | |
4901 | dummy value into second parameter relying on this function to perform the | |
4902 | change. See motivation for this in comment to handle_builtin_stack_restore | |
4903 | function. */ | |
4904 | ||
4905 | static rtx | |
4906 | expand_asan_emit_allocas_unpoison (tree exp) | |
4907 | { | |
4908 | tree arg0 = CALL_EXPR_ARG (exp, 0); | |
cd2ee6ee | 4909 | rtx top = expand_expr (arg0, NULL_RTX, ptr_mode, EXPAND_NORMAL); |
4910 | rtx bot = convert_memory_address (ptr_mode, virtual_stack_dynamic_rtx); | |
d08919a7 | 4911 | rtx ret = init_one_libfunc ("__asan_allocas_unpoison"); |
4912 | ret = emit_library_call_value (ret, NULL_RTX, LCT_NORMAL, ptr_mode, 2, top, | |
cd2ee6ee | 4913 | ptr_mode, bot, ptr_mode); |
d08919a7 | 4914 | return ret; |
4915 | } | |
4916 | ||
74bdbe96 | 4917 | /* Expand a call to bswap builtin in EXP. |
4918 | Return NULL_RTX if a normal call should be emitted rather than expanding the | |
4919 | function in-line. If convenient, the result should be placed in TARGET. | |
4920 | SUBTARGET may be used as the target for computing one of EXP's operands. */ | |
42791117 | 4921 | |
4922 | static rtx | |
3754d046 | 4923 | expand_builtin_bswap (machine_mode target_mode, tree exp, rtx target, |
74bdbe96 | 4924 | rtx subtarget) |
42791117 | 4925 | { |
42791117 | 4926 | tree arg; |
4927 | rtx op0; | |
4928 | ||
c2f47e15 | 4929 | if (!validate_arglist (exp, INTEGER_TYPE, VOID_TYPE)) |
4930 | return NULL_RTX; | |
42791117 | 4931 | |
c2f47e15 | 4932 | arg = CALL_EXPR_ARG (exp, 0); |
74bdbe96 | 4933 | op0 = expand_expr (arg, |
4934 | subtarget && GET_MODE (subtarget) == target_mode | |
4935 | ? subtarget : NULL_RTX, | |
4936 | target_mode, EXPAND_NORMAL); | |
4937 | if (GET_MODE (op0) != target_mode) | |
4938 | op0 = convert_to_mode (target_mode, op0, 1); | |
42791117 | 4939 | |
74bdbe96 | 4940 | target = expand_unop (target_mode, bswap_optab, op0, target, 1); |
42791117 | 4941 | |
4942 | gcc_assert (target); | |
4943 | ||
74bdbe96 | 4944 | return convert_to_mode (target_mode, target, 1); |
42791117 | 4945 | } |
4946 | ||
c2f47e15 | 4947 | /* Expand a call to a unary builtin in EXP. |
4948 | Return NULL_RTX if a normal call should be emitted rather than expanding the | |
53800dbe | 4949 | function in-line. If convenient, the result should be placed in TARGET. |
4950 | SUBTARGET may be used as the target for computing one of EXP's operands. */ | |
15c6cf6b | 4951 | |
53800dbe | 4952 | static rtx |
3754d046 | 4953 | expand_builtin_unop (machine_mode target_mode, tree exp, rtx target, |
aecda0d6 | 4954 | rtx subtarget, optab op_optab) |
53800dbe | 4955 | { |
4956 | rtx op0; | |
c2f47e15 | 4957 | |
4958 | if (!validate_arglist (exp, INTEGER_TYPE, VOID_TYPE)) | |
4959 | return NULL_RTX; | |
53800dbe | 4960 | |
4961 | /* Compute the argument. */ | |
f97eea22 | 4962 | op0 = expand_expr (CALL_EXPR_ARG (exp, 0), |
4963 | (subtarget | |
4964 | && (TYPE_MODE (TREE_TYPE (CALL_EXPR_ARG (exp, 0))) | |
4965 | == GET_MODE (subtarget))) ? subtarget : NULL_RTX, | |
1db6d067 | 4966 | VOIDmode, EXPAND_NORMAL); |
6a08d0ab | 4967 | /* Compute op, into TARGET if possible. |
53800dbe | 4968 | Set TARGET to wherever the result comes back. */ |
c2f47e15 | 4969 | target = expand_unop (TYPE_MODE (TREE_TYPE (CALL_EXPR_ARG (exp, 0))), |
6aaa1f9e | 4970 | op_optab, op0, target, op_optab != clrsb_optab); |
64db345d | 4971 | gcc_assert (target); |
7d3f6cc7 | 4972 | |
efb070c8 | 4973 | return convert_to_mode (target_mode, target, 0); |
53800dbe | 4974 | } |
89cfe6e5 | 4975 | |
48e1416a | 4976 | /* Expand a call to __builtin_expect. We just return our argument |
5a74f77e | 4977 | as the builtin_expect semantic should've been already executed by |
4978 | tree branch prediction pass. */ | |
89cfe6e5 | 4979 | |
4980 | static rtx | |
c2f47e15 | 4981 | expand_builtin_expect (tree exp, rtx target) |
89cfe6e5 | 4982 | { |
1e4adcfc | 4983 | tree arg; |
89cfe6e5 | 4984 | |
c2f47e15 | 4985 | if (call_expr_nargs (exp) < 2) |
89cfe6e5 | 4986 | return const0_rtx; |
c2f47e15 | 4987 | arg = CALL_EXPR_ARG (exp, 0); |
89cfe6e5 | 4988 | |
c2f47e15 | 4989 | target = expand_expr (arg, target, VOIDmode, EXPAND_NORMAL); |
5a74f77e | 4990 | /* When guessing was done, the hints should be already stripped away. */ |
07311427 | 4991 | gcc_assert (!flag_guess_branch_prob |
852f689e | 4992 | || optimize == 0 || seen_error ()); |
89cfe6e5 | 4993 | return target; |
4994 | } | |
689df48e | 4995 | |
fca0886c | 4996 | /* Expand a call to __builtin_assume_aligned. We just return our first |
4997 | argument as the builtin_assume_aligned semantic should've been already | |
4998 | executed by CCP. */ | |
4999 | ||
5000 | static rtx | |
5001 | expand_builtin_assume_aligned (tree exp, rtx target) | |
5002 | { | |
5003 | if (call_expr_nargs (exp) < 2) | |
5004 | return const0_rtx; | |
5005 | target = expand_expr (CALL_EXPR_ARG (exp, 0), target, VOIDmode, | |
5006 | EXPAND_NORMAL); | |
5007 | gcc_assert (!TREE_SIDE_EFFECTS (CALL_EXPR_ARG (exp, 1)) | |
5008 | && (call_expr_nargs (exp) < 3 | |
5009 | || !TREE_SIDE_EFFECTS (CALL_EXPR_ARG (exp, 2)))); | |
5010 | return target; | |
5011 | } | |
5012 | ||
c22de3f0 | 5013 | void |
aecda0d6 | 5014 | expand_builtin_trap (void) |
a0ef1725 | 5015 | { |
4db8dd0c | 5016 | if (targetm.have_trap ()) |
f73960eb | 5017 | { |
4db8dd0c | 5018 | rtx_insn *insn = emit_insn (targetm.gen_trap ()); |
f73960eb | 5019 | /* For trap insns when not accumulating outgoing args force |
5020 | REG_ARGS_SIZE note to prevent crossjumping of calls with | |
5021 | different args sizes. */ | |
5022 | if (!ACCUMULATE_OUTGOING_ARGS) | |
5023 | add_reg_note (insn, REG_ARGS_SIZE, GEN_INT (stack_pointer_delta)); | |
5024 | } | |
a0ef1725 | 5025 | else |
61ffc71a | 5026 | { |
5027 | tree fn = builtin_decl_implicit (BUILT_IN_ABORT); | |
5028 | tree call_expr = build_call_expr (fn, 0); | |
5029 | expand_call (call_expr, NULL_RTX, false); | |
5030 | } | |
5031 | ||
a0ef1725 | 5032 | emit_barrier (); |
5033 | } | |
78a74442 | 5034 | |
d2b48f0c | 5035 | /* Expand a call to __builtin_unreachable. We do nothing except emit |
5036 | a barrier saying that control flow will not pass here. | |
5037 | ||
5038 | It is the responsibility of the program being compiled to ensure | |
5039 | that control flow does never reach __builtin_unreachable. */ | |
5040 | static void | |
5041 | expand_builtin_unreachable (void) | |
5042 | { | |
5043 | emit_barrier (); | |
5044 | } | |
5045 | ||
c2f47e15 | 5046 | /* Expand EXP, a call to fabs, fabsf or fabsl. |
5047 | Return NULL_RTX if a normal call should be emitted rather than expanding | |
78a74442 | 5048 | the function inline. If convenient, the result should be placed |
5049 | in TARGET. SUBTARGET may be used as the target for computing | |
5050 | the operand. */ | |
5051 | ||
5052 | static rtx | |
c2f47e15 | 5053 | expand_builtin_fabs (tree exp, rtx target, rtx subtarget) |
78a74442 | 5054 | { |
3754d046 | 5055 | machine_mode mode; |
78a74442 | 5056 | tree arg; |
5057 | rtx op0; | |
5058 | ||
c2f47e15 | 5059 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
5060 | return NULL_RTX; | |
78a74442 | 5061 | |
c2f47e15 | 5062 | arg = CALL_EXPR_ARG (exp, 0); |
c7f617c2 | 5063 | CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg); |
78a74442 | 5064 | mode = TYPE_MODE (TREE_TYPE (arg)); |
1db6d067 | 5065 | op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL); |
78a74442 | 5066 | return expand_abs (mode, op0, target, 0, safe_from_p (target, arg, 1)); |
5067 | } | |
5068 | ||
c2f47e15 | 5069 | /* Expand EXP, a call to copysign, copysignf, or copysignl. |
270436f3 | 5070 | Return NULL is a normal call should be emitted rather than expanding the |
5071 | function inline. If convenient, the result should be placed in TARGET. | |
5072 | SUBTARGET may be used as the target for computing the operand. */ | |
5073 | ||
5074 | static rtx | |
c2f47e15 | 5075 | expand_builtin_copysign (tree exp, rtx target, rtx subtarget) |
270436f3 | 5076 | { |
5077 | rtx op0, op1; | |
5078 | tree arg; | |
5079 | ||
c2f47e15 | 5080 | if (!validate_arglist (exp, REAL_TYPE, REAL_TYPE, VOID_TYPE)) |
5081 | return NULL_RTX; | |
270436f3 | 5082 | |
c2f47e15 | 5083 | arg = CALL_EXPR_ARG (exp, 0); |
8ec3c5c2 | 5084 | op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL); |
270436f3 | 5085 | |
c2f47e15 | 5086 | arg = CALL_EXPR_ARG (exp, 1); |
8ec3c5c2 | 5087 | op1 = expand_normal (arg); |
270436f3 | 5088 | |
5089 | return expand_copysign (op0, op1, target); | |
5090 | } | |
5091 | ||
ac8fb6db | 5092 | /* Expand a call to __builtin___clear_cache. */ |
5093 | ||
5094 | static rtx | |
32e17df0 | 5095 | expand_builtin___clear_cache (tree exp) |
ac8fb6db | 5096 | { |
32e17df0 | 5097 | if (!targetm.code_for_clear_cache) |
5098 | { | |
ac8fb6db | 5099 | #ifdef CLEAR_INSN_CACHE |
32e17df0 | 5100 | /* There is no "clear_cache" insn, and __clear_cache() in libgcc |
5101 | does something. Just do the default expansion to a call to | |
5102 | __clear_cache(). */ | |
5103 | return NULL_RTX; | |
ac8fb6db | 5104 | #else |
32e17df0 | 5105 | /* There is no "clear_cache" insn, and __clear_cache() in libgcc |
5106 | does nothing. There is no need to call it. Do nothing. */ | |
5107 | return const0_rtx; | |
ac8fb6db | 5108 | #endif /* CLEAR_INSN_CACHE */ |
32e17df0 | 5109 | } |
5110 | ||
ac8fb6db | 5111 | /* We have a "clear_cache" insn, and it will handle everything. */ |
5112 | tree begin, end; | |
5113 | rtx begin_rtx, end_rtx; | |
ac8fb6db | 5114 | |
5115 | /* We must not expand to a library call. If we did, any | |
5116 | fallback library function in libgcc that might contain a call to | |
5117 | __builtin___clear_cache() would recurse infinitely. */ | |
5118 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) | |
5119 | { | |
5120 | error ("both arguments to %<__builtin___clear_cache%> must be pointers"); | |
5121 | return const0_rtx; | |
5122 | } | |
5123 | ||
32e17df0 | 5124 | if (targetm.have_clear_cache ()) |
ac8fb6db | 5125 | { |
8786db1e | 5126 | struct expand_operand ops[2]; |
ac8fb6db | 5127 | |
5128 | begin = CALL_EXPR_ARG (exp, 0); | |
5129 | begin_rtx = expand_expr (begin, NULL_RTX, Pmode, EXPAND_NORMAL); | |
ac8fb6db | 5130 | |
5131 | end = CALL_EXPR_ARG (exp, 1); | |
5132 | end_rtx = expand_expr (end, NULL_RTX, Pmode, EXPAND_NORMAL); | |
ac8fb6db | 5133 | |
8786db1e | 5134 | create_address_operand (&ops[0], begin_rtx); |
5135 | create_address_operand (&ops[1], end_rtx); | |
32e17df0 | 5136 | if (maybe_expand_insn (targetm.code_for_clear_cache, 2, ops)) |
8786db1e | 5137 | return const0_rtx; |
ac8fb6db | 5138 | } |
5139 | return const0_rtx; | |
ac8fb6db | 5140 | } |
5141 | ||
4ee9c684 | 5142 | /* Given a trampoline address, make sure it satisfies TRAMPOLINE_ALIGNMENT. */ |
5143 | ||
5144 | static rtx | |
5145 | round_trampoline_addr (rtx tramp) | |
5146 | { | |
5147 | rtx temp, addend, mask; | |
5148 | ||
5149 | /* If we don't need too much alignment, we'll have been guaranteed | |
5150 | proper alignment by get_trampoline_type. */ | |
5151 | if (TRAMPOLINE_ALIGNMENT <= STACK_BOUNDARY) | |
5152 | return tramp; | |
5153 | ||
5154 | /* Round address up to desired boundary. */ | |
5155 | temp = gen_reg_rtx (Pmode); | |
0359f9f5 | 5156 | addend = gen_int_mode (TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT - 1, Pmode); |
5157 | mask = gen_int_mode (-TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT, Pmode); | |
4ee9c684 | 5158 | |
5159 | temp = expand_simple_binop (Pmode, PLUS, tramp, addend, | |
5160 | temp, 0, OPTAB_LIB_WIDEN); | |
5161 | tramp = expand_simple_binop (Pmode, AND, temp, mask, | |
5162 | temp, 0, OPTAB_LIB_WIDEN); | |
5163 | ||
5164 | return tramp; | |
5165 | } | |
5166 | ||
5167 | static rtx | |
c307f106 | 5168 | expand_builtin_init_trampoline (tree exp, bool onstack) |
4ee9c684 | 5169 | { |
5170 | tree t_tramp, t_func, t_chain; | |
82c7907c | 5171 | rtx m_tramp, r_tramp, r_chain, tmp; |
4ee9c684 | 5172 | |
c2f47e15 | 5173 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, |
4ee9c684 | 5174 | POINTER_TYPE, VOID_TYPE)) |
5175 | return NULL_RTX; | |
5176 | ||
c2f47e15 | 5177 | t_tramp = CALL_EXPR_ARG (exp, 0); |
5178 | t_func = CALL_EXPR_ARG (exp, 1); | |
5179 | t_chain = CALL_EXPR_ARG (exp, 2); | |
4ee9c684 | 5180 | |
8ec3c5c2 | 5181 | r_tramp = expand_normal (t_tramp); |
82c7907c | 5182 | m_tramp = gen_rtx_MEM (BLKmode, r_tramp); |
5183 | MEM_NOTRAP_P (m_tramp) = 1; | |
5184 | ||
c307f106 | 5185 | /* If ONSTACK, the TRAMP argument should be the address of a field |
5186 | within the local function's FRAME decl. Either way, let's see if | |
5187 | we can fill in the MEM_ATTRs for this memory. */ | |
82c7907c | 5188 | if (TREE_CODE (t_tramp) == ADDR_EXPR) |
f4146cb8 | 5189 | set_mem_attributes (m_tramp, TREE_OPERAND (t_tramp, 0), true); |
82c7907c | 5190 | |
c307f106 | 5191 | /* Creator of a heap trampoline is responsible for making sure the |
5192 | address is aligned to at least STACK_BOUNDARY. Normally malloc | |
5193 | will ensure this anyhow. */ | |
82c7907c | 5194 | tmp = round_trampoline_addr (r_tramp); |
5195 | if (tmp != r_tramp) | |
5196 | { | |
5197 | m_tramp = change_address (m_tramp, BLKmode, tmp); | |
5198 | set_mem_align (m_tramp, TRAMPOLINE_ALIGNMENT); | |
5b2a69fa | 5199 | set_mem_size (m_tramp, TRAMPOLINE_SIZE); |
82c7907c | 5200 | } |
5201 | ||
5202 | /* The FUNC argument should be the address of the nested function. | |
5203 | Extract the actual function decl to pass to the hook. */ | |
5204 | gcc_assert (TREE_CODE (t_func) == ADDR_EXPR); | |
5205 | t_func = TREE_OPERAND (t_func, 0); | |
5206 | gcc_assert (TREE_CODE (t_func) == FUNCTION_DECL); | |
5207 | ||
8ec3c5c2 | 5208 | r_chain = expand_normal (t_chain); |
4ee9c684 | 5209 | |
5210 | /* Generate insns to initialize the trampoline. */ | |
82c7907c | 5211 | targetm.calls.trampoline_init (m_tramp, t_func, r_chain); |
4ee9c684 | 5212 | |
c307f106 | 5213 | if (onstack) |
5214 | { | |
5215 | trampolines_created = 1; | |
8bc8a8f4 | 5216 | |
a27e3913 | 5217 | if (targetm.calls.custom_function_descriptors != 0) |
5218 | warning_at (DECL_SOURCE_LOCATION (t_func), OPT_Wtrampolines, | |
5219 | "trampoline generated for nested function %qD", t_func); | |
c307f106 | 5220 | } |
8bc8a8f4 | 5221 | |
4ee9c684 | 5222 | return const0_rtx; |
5223 | } | |
5224 | ||
5225 | static rtx | |
c2f47e15 | 5226 | expand_builtin_adjust_trampoline (tree exp) |
4ee9c684 | 5227 | { |
5228 | rtx tramp; | |
5229 | ||
c2f47e15 | 5230 | if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) |
4ee9c684 | 5231 | return NULL_RTX; |
5232 | ||
c2f47e15 | 5233 | tramp = expand_normal (CALL_EXPR_ARG (exp, 0)); |
4ee9c684 | 5234 | tramp = round_trampoline_addr (tramp); |
82c7907c | 5235 | if (targetm.calls.trampoline_adjust_address) |
5236 | tramp = targetm.calls.trampoline_adjust_address (tramp); | |
4ee9c684 | 5237 | |
5238 | return tramp; | |
5239 | } | |
5240 | ||
a27e3913 | 5241 | /* Expand a call to the builtin descriptor initialization routine. |
5242 | A descriptor is made up of a couple of pointers to the static | |
5243 | chain and the code entry in this order. */ | |
5244 | ||
5245 | static rtx | |
5246 | expand_builtin_init_descriptor (tree exp) | |
5247 | { | |
5248 | tree t_descr, t_func, t_chain; | |
5249 | rtx m_descr, r_descr, r_func, r_chain; | |
5250 | ||
5251 | if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, POINTER_TYPE, | |
5252 | VOID_TYPE)) | |
5253 | return NULL_RTX; | |
5254 | ||
5255 | t_descr = CALL_EXPR_ARG (exp, 0); | |
5256 | t_func = CALL_EXPR_ARG (exp, 1); | |
5257 | t_chain = CALL_EXPR_ARG (exp, 2); | |
5258 | ||
5259 | r_descr = expand_normal (t_descr); | |
5260 | m_descr = gen_rtx_MEM (BLKmode, r_descr); | |
5261 | MEM_NOTRAP_P (m_descr) = 1; | |
5262 | ||
5263 | r_func = expand_normal (t_func); | |
5264 | r_chain = expand_normal (t_chain); | |
5265 | ||
5266 | /* Generate insns to initialize the descriptor. */ | |
5267 | emit_move_insn (adjust_address_nv (m_descr, ptr_mode, 0), r_chain); | |
5268 | emit_move_insn (adjust_address_nv (m_descr, ptr_mode, | |
5269 | POINTER_SIZE / BITS_PER_UNIT), r_func); | |
5270 | ||
5271 | return const0_rtx; | |
5272 | } | |
5273 | ||
5274 | /* Expand a call to the builtin descriptor adjustment routine. */ | |
5275 | ||
5276 | static rtx | |
5277 | expand_builtin_adjust_descriptor (tree exp) | |
5278 | { | |
5279 | rtx tramp; | |
5280 | ||
5281 | if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) | |
5282 | return NULL_RTX; | |
5283 | ||
5284 | tramp = expand_normal (CALL_EXPR_ARG (exp, 0)); | |
5285 | ||
5286 | /* Unalign the descriptor to allow runtime identification. */ | |
5287 | tramp = plus_constant (ptr_mode, tramp, | |
5288 | targetm.calls.custom_function_descriptors); | |
5289 | ||
5290 | return force_operand (tramp, NULL_RTX); | |
5291 | } | |
5292 | ||
93f564d6 | 5293 | /* Expand the call EXP to the built-in signbit, signbitf or signbitl |
5294 | function. The function first checks whether the back end provides | |
5295 | an insn to implement signbit for the respective mode. If not, it | |
5296 | checks whether the floating point format of the value is such that | |
10902624 | 5297 | the sign bit can be extracted. If that is not the case, error out. |
5298 | EXP is the expression that is a call to the builtin function; if | |
5299 | convenient, the result should be placed in TARGET. */ | |
27f261ef | 5300 | static rtx |
5301 | expand_builtin_signbit (tree exp, rtx target) | |
5302 | { | |
5303 | const struct real_format *fmt; | |
3754d046 | 5304 | machine_mode fmode, imode, rmode; |
c2f47e15 | 5305 | tree arg; |
ca4f1f5b | 5306 | int word, bitpos; |
27eda240 | 5307 | enum insn_code icode; |
27f261ef | 5308 | rtx temp; |
389dd41b | 5309 | location_t loc = EXPR_LOCATION (exp); |
27f261ef | 5310 | |
c2f47e15 | 5311 | if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE)) |
5312 | return NULL_RTX; | |
27f261ef | 5313 | |
c2f47e15 | 5314 | arg = CALL_EXPR_ARG (exp, 0); |
27f261ef | 5315 | fmode = TYPE_MODE (TREE_TYPE (arg)); |
5316 | rmode = TYPE_MODE (TREE_TYPE (exp)); | |
5317 | fmt = REAL_MODE_FORMAT (fmode); | |
5318 | ||
93f564d6 | 5319 | arg = builtin_save_expr (arg); |
5320 | ||
5321 | /* Expand the argument yielding a RTX expression. */ | |
5322 | temp = expand_normal (arg); | |
5323 | ||
5324 | /* Check if the back end provides an insn that handles signbit for the | |
5325 | argument's mode. */ | |
d6bf3b14 | 5326 | icode = optab_handler (signbit_optab, fmode); |
27eda240 | 5327 | if (icode != CODE_FOR_nothing) |
93f564d6 | 5328 | { |
1e0c0b35 | 5329 | rtx_insn *last = get_last_insn (); |
93f564d6 | 5330 | target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp))); |
4e2a2fb4 | 5331 | if (maybe_emit_unop_insn (icode, target, temp, UNKNOWN)) |
5332 | return target; | |
5333 | delete_insns_since (last); | |
93f564d6 | 5334 | } |
5335 | ||
27f261ef | 5336 | /* For floating point formats without a sign bit, implement signbit |
5337 | as "ARG < 0.0". */ | |
8d564692 | 5338 | bitpos = fmt->signbit_ro; |
ca4f1f5b | 5339 | if (bitpos < 0) |
27f261ef | 5340 | { |
5341 | /* But we can't do this if the format supports signed zero. */ | |
10902624 | 5342 | gcc_assert (!fmt->has_signed_zero || !HONOR_SIGNED_ZEROS (fmode)); |
27f261ef | 5343 | |
389dd41b | 5344 | arg = fold_build2_loc (loc, LT_EXPR, TREE_TYPE (exp), arg, |
49d00087 | 5345 | build_real (TREE_TYPE (arg), dconst0)); |
27f261ef | 5346 | return expand_expr (arg, target, VOIDmode, EXPAND_NORMAL); |
5347 | } | |
5348 | ||
ca4f1f5b | 5349 | if (GET_MODE_SIZE (fmode) <= UNITS_PER_WORD) |
27f261ef | 5350 | { |
ca4f1f5b | 5351 | imode = int_mode_for_mode (fmode); |
10902624 | 5352 | gcc_assert (imode != BLKmode); |
ca4f1f5b | 5353 | temp = gen_lowpart (imode, temp); |
24fd4260 | 5354 | } |
5355 | else | |
5356 | { | |
ca4f1f5b | 5357 | imode = word_mode; |
5358 | /* Handle targets with different FP word orders. */ | |
5359 | if (FLOAT_WORDS_BIG_ENDIAN) | |
a0c938f0 | 5360 | word = (GET_MODE_BITSIZE (fmode) - bitpos) / BITS_PER_WORD; |
ca4f1f5b | 5361 | else |
a0c938f0 | 5362 | word = bitpos / BITS_PER_WORD; |
ca4f1f5b | 5363 | temp = operand_subword_force (temp, word, fmode); |
5364 | bitpos = bitpos % BITS_PER_WORD; | |
5365 | } | |
5366 | ||
44b0f1d0 | 5367 | /* Force the intermediate word_mode (or narrower) result into a |
5368 | register. This avoids attempting to create paradoxical SUBREGs | |
5369 | of floating point modes below. */ | |
5370 | temp = force_reg (imode, temp); | |
5371 | ||
ca4f1f5b | 5372 | /* If the bitpos is within the "result mode" lowpart, the operation |
5373 | can be implement with a single bitwise AND. Otherwise, we need | |
5374 | a right shift and an AND. */ | |
5375 | ||
5376 | if (bitpos < GET_MODE_BITSIZE (rmode)) | |
5377 | { | |
796b6678 | 5378 | wide_int mask = wi::set_bit_in_zero (bitpos, GET_MODE_PRECISION (rmode)); |
27f261ef | 5379 | |
4a46f016 | 5380 | if (GET_MODE_SIZE (imode) > GET_MODE_SIZE (rmode)) |
ca4f1f5b | 5381 | temp = gen_lowpart (rmode, temp); |
24fd4260 | 5382 | temp = expand_binop (rmode, and_optab, temp, |
e913b5cd | 5383 | immed_wide_int_const (mask, rmode), |
ca4f1f5b | 5384 | NULL_RTX, 1, OPTAB_LIB_WIDEN); |
27f261ef | 5385 | } |
ca4f1f5b | 5386 | else |
5387 | { | |
5388 | /* Perform a logical right shift to place the signbit in the least | |
a0c938f0 | 5389 | significant bit, then truncate the result to the desired mode |
ca4f1f5b | 5390 | and mask just this bit. */ |
f5ff0b21 | 5391 | temp = expand_shift (RSHIFT_EXPR, imode, temp, bitpos, NULL_RTX, 1); |
ca4f1f5b | 5392 | temp = gen_lowpart (rmode, temp); |
5393 | temp = expand_binop (rmode, and_optab, temp, const1_rtx, | |
5394 | NULL_RTX, 1, OPTAB_LIB_WIDEN); | |
5395 | } | |
5396 | ||
27f261ef | 5397 | return temp; |
5398 | } | |
73673831 | 5399 | |
5400 | /* Expand fork or exec calls. TARGET is the desired target of the | |
c2f47e15 | 5401 | call. EXP is the call. FN is the |
73673831 | 5402 | identificator of the actual function. IGNORE is nonzero if the |
5403 | value is to be ignored. */ | |
5404 | ||
5405 | static rtx | |
c2f47e15 | 5406 | expand_builtin_fork_or_exec (tree fn, tree exp, rtx target, int ignore) |
73673831 | 5407 | { |
5408 | tree id, decl; | |
5409 | tree call; | |
5410 | ||
5411 | /* If we are not profiling, just call the function. */ | |
5412 | if (!profile_arc_flag) | |
5413 | return NULL_RTX; | |
5414 | ||
5415 | /* Otherwise call the wrapper. This should be equivalent for the rest of | |
5416 | compiler, so the code does not diverge, and the wrapper may run the | |
9c9bad97 | 5417 | code necessary for keeping the profiling sane. */ |
73673831 | 5418 | |
5419 | switch (DECL_FUNCTION_CODE (fn)) | |
5420 | { | |
5421 | case BUILT_IN_FORK: | |
5422 | id = get_identifier ("__gcov_fork"); | |
5423 | break; | |
5424 | ||
5425 | case BUILT_IN_EXECL: | |
5426 | id = get_identifier ("__gcov_execl"); | |
5427 | break; | |
5428 | ||
5429 | case BUILT_IN_EXECV: | |
5430 | id = get_identifier ("__gcov_execv"); | |
5431 | break; | |
5432 | ||
5433 | case BUILT_IN_EXECLP: | |
5434 | id = get_identifier ("__gcov_execlp"); | |
5435 | break; | |
5436 | ||
5437 | case BUILT_IN_EXECLE: | |
5438 | id = get_identifier ("__gcov_execle"); | |
5439 | break; | |
5440 | ||
5441 | case BUILT_IN_EXECVP: | |
5442 | id = get_identifier ("__gcov_execvp"); | |
5443 | break; | |
5444 | ||
5445 | case BUILT_IN_EXECVE: | |
5446 | id = get_identifier ("__gcov_execve"); | |
5447 | break; | |
5448 | ||
5449 | default: | |
64db345d | 5450 | gcc_unreachable (); |
73673831 | 5451 | } |
5452 | ||
e60a6f7b | 5453 | decl = build_decl (DECL_SOURCE_LOCATION (fn), |
5454 | FUNCTION_DECL, id, TREE_TYPE (fn)); | |
73673831 | 5455 | DECL_EXTERNAL (decl) = 1; |
5456 | TREE_PUBLIC (decl) = 1; | |
5457 | DECL_ARTIFICIAL (decl) = 1; | |
5458 | TREE_NOTHROW (decl) = 1; | |
e82d310b | 5459 | DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT; |
5460 | DECL_VISIBILITY_SPECIFIED (decl) = 1; | |
389dd41b | 5461 | call = rewrite_call_expr (EXPR_LOCATION (exp), exp, 0, decl, 0); |
73673831 | 5462 | return expand_call (call, target, ignore); |
c2f47e15 | 5463 | } |
48e1416a | 5464 | |
b6a5fc45 | 5465 | |
5466 | \f | |
3e272de8 | 5467 | /* Reconstitute a mode for a __sync intrinsic operation. Since the type of |
5468 | the pointer in these functions is void*, the tree optimizers may remove | |
5469 | casts. The mode computed in expand_builtin isn't reliable either, due | |
5470 | to __sync_bool_compare_and_swap. | |
5471 | ||
5472 | FCODE_DIFF should be fcode - base, where base is the FOO_1 code for the | |
5473 | group of builtins. This gives us log2 of the mode size. */ | |
5474 | ||
3754d046 | 5475 | static inline machine_mode |
3e272de8 | 5476 | get_builtin_sync_mode (int fcode_diff) |
5477 | { | |
ad3a13b5 | 5478 | /* The size is not negotiable, so ask not to get BLKmode in return |
5479 | if the target indicates that a smaller size would be better. */ | |
5480 | return mode_for_size (BITS_PER_UNIT << fcode_diff, MODE_INT, 0); | |
3e272de8 | 5481 | } |
5482 | ||
041e0215 | 5483 | /* Expand the memory expression LOC and return the appropriate memory operand |
5484 | for the builtin_sync operations. */ | |
5485 | ||
5486 | static rtx | |
3754d046 | 5487 | get_builtin_sync_mem (tree loc, machine_mode mode) |
041e0215 | 5488 | { |
5489 | rtx addr, mem; | |
5490 | ||
7f4d56ad | 5491 | addr = expand_expr (loc, NULL_RTX, ptr_mode, EXPAND_SUM); |
5492 | addr = convert_memory_address (Pmode, addr); | |
041e0215 | 5493 | |
5494 | /* Note that we explicitly do not want any alias information for this | |
5495 | memory, so that we kill all other live memories. Otherwise we don't | |
5496 | satisfy the full barrier semantics of the intrinsic. */ | |
5497 | mem = validize_mem (gen_rtx_MEM (mode, addr)); | |
5498 | ||
153c3b50 | 5499 | /* The alignment needs to be at least according to that of the mode. */ |
5500 | set_mem_align (mem, MAX (GET_MODE_ALIGNMENT (mode), | |
957d0361 | 5501 | get_pointer_alignment (loc))); |
c94cfd1c | 5502 | set_mem_alias_set (mem, ALIAS_SET_MEMORY_BARRIER); |
041e0215 | 5503 | MEM_VOLATILE_P (mem) = 1; |
5504 | ||
5505 | return mem; | |
5506 | } | |
5507 | ||
1cd6e20d | 5508 | /* Make sure an argument is in the right mode. |
5509 | EXP is the tree argument. | |
5510 | MODE is the mode it should be in. */ | |
5511 | ||
5512 | static rtx | |
3754d046 | 5513 | expand_expr_force_mode (tree exp, machine_mode mode) |
1cd6e20d | 5514 | { |
5515 | rtx val; | |
3754d046 | 5516 | machine_mode old_mode; |
1cd6e20d | 5517 | |
5518 | val = expand_expr (exp, NULL_RTX, mode, EXPAND_NORMAL); | |
5519 | /* If VAL is promoted to a wider mode, convert it back to MODE. Take care | |
5520 | of CONST_INTs, where we know the old_mode only from the call argument. */ | |
5521 | ||
5522 | old_mode = GET_MODE (val); | |
5523 | if (old_mode == VOIDmode) | |
5524 | old_mode = TYPE_MODE (TREE_TYPE (exp)); | |
5525 | val = convert_modes (mode, old_mode, val, 1); | |
5526 | return val; | |
5527 | } | |
5528 | ||
5529 | ||
b6a5fc45 | 5530 | /* Expand the __sync_xxx_and_fetch and __sync_fetch_and_xxx intrinsics. |
c2f47e15 | 5531 | EXP is the CALL_EXPR. CODE is the rtx code |
b6a5fc45 | 5532 | that corresponds to the arithmetic or logical operation from the name; |
5533 | an exception here is that NOT actually means NAND. TARGET is an optional | |
5534 | place for us to store the results; AFTER is true if this is the | |
1cd6e20d | 5535 | fetch_and_xxx form. */ |
b6a5fc45 | 5536 | |
5537 | static rtx | |
3754d046 | 5538 | expand_builtin_sync_operation (machine_mode mode, tree exp, |
3e272de8 | 5539 | enum rtx_code code, bool after, |
1cd6e20d | 5540 | rtx target) |
b6a5fc45 | 5541 | { |
041e0215 | 5542 | rtx val, mem; |
e60a6f7b | 5543 | location_t loc = EXPR_LOCATION (exp); |
b6a5fc45 | 5544 | |
cf73e559 | 5545 | if (code == NOT && warn_sync_nand) |
5546 | { | |
5547 | tree fndecl = get_callee_fndecl (exp); | |
5548 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
5549 | ||
5550 | static bool warned_f_a_n, warned_n_a_f; | |
5551 | ||
5552 | switch (fcode) | |
5553 | { | |
2797f13a | 5554 | case BUILT_IN_SYNC_FETCH_AND_NAND_1: |
5555 | case BUILT_IN_SYNC_FETCH_AND_NAND_2: | |
5556 | case BUILT_IN_SYNC_FETCH_AND_NAND_4: | |
5557 | case BUILT_IN_SYNC_FETCH_AND_NAND_8: | |
5558 | case BUILT_IN_SYNC_FETCH_AND_NAND_16: | |
cf73e559 | 5559 | if (warned_f_a_n) |
5560 | break; | |
5561 | ||
b9a16870 | 5562 | fndecl = builtin_decl_implicit (BUILT_IN_SYNC_FETCH_AND_NAND_N); |
e60a6f7b | 5563 | inform (loc, "%qD changed semantics in GCC 4.4", fndecl); |
cf73e559 | 5564 | warned_f_a_n = true; |
5565 | break; | |
5566 | ||
2797f13a | 5567 | case BUILT_IN_SYNC_NAND_AND_FETCH_1: |
5568 | case BUILT_IN_SYNC_NAND_AND_FETCH_2: | |
5569 | case BUILT_IN_SYNC_NAND_AND_FETCH_4: | |
5570 | case BUILT_IN_SYNC_NAND_AND_FETCH_8: | |
5571 | case BUILT_IN_SYNC_NAND_AND_FETCH_16: | |
cf73e559 | 5572 | if (warned_n_a_f) |
5573 | break; | |
5574 | ||
b9a16870 | 5575 | fndecl = builtin_decl_implicit (BUILT_IN_SYNC_NAND_AND_FETCH_N); |
e60a6f7b | 5576 | inform (loc, "%qD changed semantics in GCC 4.4", fndecl); |
cf73e559 | 5577 | warned_n_a_f = true; |
5578 | break; | |
5579 | ||
5580 | default: | |
5581 | gcc_unreachable (); | |
5582 | } | |
5583 | } | |
5584 | ||
b6a5fc45 | 5585 | /* Expand the operands. */ |
c2f47e15 | 5586 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); |
1cd6e20d | 5587 | val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); |
b6a5fc45 | 5588 | |
a372f7ca | 5589 | return expand_atomic_fetch_op (target, mem, val, code, MEMMODEL_SYNC_SEQ_CST, |
1cd6e20d | 5590 | after); |
b6a5fc45 | 5591 | } |
5592 | ||
5593 | /* Expand the __sync_val_compare_and_swap and __sync_bool_compare_and_swap | |
c2f47e15 | 5594 | intrinsics. EXP is the CALL_EXPR. IS_BOOL is |
b6a5fc45 | 5595 | true if this is the boolean form. TARGET is a place for us to store the |
5596 | results; this is NOT optional if IS_BOOL is true. */ | |
5597 | ||
5598 | static rtx | |
3754d046 | 5599 | expand_builtin_compare_and_swap (machine_mode mode, tree exp, |
3e272de8 | 5600 | bool is_bool, rtx target) |
b6a5fc45 | 5601 | { |
041e0215 | 5602 | rtx old_val, new_val, mem; |
ba885f6a | 5603 | rtx *pbool, *poval; |
b6a5fc45 | 5604 | |
5605 | /* Expand the operands. */ | |
c2f47e15 | 5606 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); |
1cd6e20d | 5607 | old_val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); |
5608 | new_val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 2), mode); | |
b6a5fc45 | 5609 | |
ba885f6a | 5610 | pbool = poval = NULL; |
5611 | if (target != const0_rtx) | |
5612 | { | |
5613 | if (is_bool) | |
5614 | pbool = ⌖ | |
5615 | else | |
5616 | poval = ⌖ | |
5617 | } | |
5618 | if (!expand_atomic_compare_and_swap (pbool, poval, mem, old_val, new_val, | |
a372f7ca | 5619 | false, MEMMODEL_SYNC_SEQ_CST, |
5620 | MEMMODEL_SYNC_SEQ_CST)) | |
1cd6e20d | 5621 | return NULL_RTX; |
c2f47e15 | 5622 | |
1cd6e20d | 5623 | return target; |
b6a5fc45 | 5624 | } |
5625 | ||
5626 | /* Expand the __sync_lock_test_and_set intrinsic. Note that the most | |
5627 | general form is actually an atomic exchange, and some targets only | |
5628 | support a reduced form with the second argument being a constant 1. | |
48e1416a | 5629 | EXP is the CALL_EXPR; TARGET is an optional place for us to store |
c2f47e15 | 5630 | the results. */ |
b6a5fc45 | 5631 | |
5632 | static rtx | |
3754d046 | 5633 | expand_builtin_sync_lock_test_and_set (machine_mode mode, tree exp, |
1cd6e20d | 5634 | rtx target) |
b6a5fc45 | 5635 | { |
041e0215 | 5636 | rtx val, mem; |
b6a5fc45 | 5637 | |
5638 | /* Expand the operands. */ | |
c2f47e15 | 5639 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); |
1cd6e20d | 5640 | val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); |
5641 | ||
7821cde1 | 5642 | return expand_sync_lock_test_and_set (target, mem, val); |
1cd6e20d | 5643 | } |
5644 | ||
5645 | /* Expand the __sync_lock_release intrinsic. EXP is the CALL_EXPR. */ | |
5646 | ||
5647 | static void | |
3754d046 | 5648 | expand_builtin_sync_lock_release (machine_mode mode, tree exp) |
1cd6e20d | 5649 | { |
5650 | rtx mem; | |
5651 | ||
5652 | /* Expand the operands. */ | |
5653 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
5654 | ||
a372f7ca | 5655 | expand_atomic_store (mem, const0_rtx, MEMMODEL_SYNC_RELEASE, true); |
1cd6e20d | 5656 | } |
5657 | ||
5658 | /* Given an integer representing an ``enum memmodel'', verify its | |
5659 | correctness and return the memory model enum. */ | |
5660 | ||
5661 | static enum memmodel | |
5662 | get_memmodel (tree exp) | |
5663 | { | |
5664 | rtx op; | |
7f738025 | 5665 | unsigned HOST_WIDE_INT val; |
2cb724f9 | 5666 | source_location loc |
5667 | = expansion_point_location_if_in_system_header (input_location); | |
1cd6e20d | 5668 | |
5669 | /* If the parameter is not a constant, it's a run time value so we'll just | |
5670 | convert it to MEMMODEL_SEQ_CST to avoid annoying runtime checking. */ | |
5671 | if (TREE_CODE (exp) != INTEGER_CST) | |
5672 | return MEMMODEL_SEQ_CST; | |
5673 | ||
5674 | op = expand_normal (exp); | |
7f738025 | 5675 | |
5676 | val = INTVAL (op); | |
5677 | if (targetm.memmodel_check) | |
5678 | val = targetm.memmodel_check (val); | |
5679 | else if (val & ~MEMMODEL_MASK) | |
5680 | { | |
2cb724f9 | 5681 | warning_at (loc, OPT_Winvalid_memory_model, |
5682 | "unknown architecture specifier in memory model to builtin"); | |
7f738025 | 5683 | return MEMMODEL_SEQ_CST; |
5684 | } | |
5685 | ||
a372f7ca | 5686 | /* Should never see a user explicit SYNC memodel model, so >= LAST works. */ |
5687 | if (memmodel_base (val) >= MEMMODEL_LAST) | |
1cd6e20d | 5688 | { |
2cb724f9 | 5689 | warning_at (loc, OPT_Winvalid_memory_model, |
5690 | "invalid memory model argument to builtin"); | |
1cd6e20d | 5691 | return MEMMODEL_SEQ_CST; |
5692 | } | |
7f738025 | 5693 | |
3070f133 | 5694 | /* Workaround for Bugzilla 59448. GCC doesn't track consume properly, so |
5695 | be conservative and promote consume to acquire. */ | |
5696 | if (val == MEMMODEL_CONSUME) | |
5697 | val = MEMMODEL_ACQUIRE; | |
5698 | ||
7f738025 | 5699 | return (enum memmodel) val; |
1cd6e20d | 5700 | } |
5701 | ||
5702 | /* Expand the __atomic_exchange intrinsic: | |
5703 | TYPE __atomic_exchange (TYPE *object, TYPE desired, enum memmodel) | |
5704 | EXP is the CALL_EXPR. | |
5705 | TARGET is an optional place for us to store the results. */ | |
5706 | ||
5707 | static rtx | |
3754d046 | 5708 | expand_builtin_atomic_exchange (machine_mode mode, tree exp, rtx target) |
1cd6e20d | 5709 | { |
5710 | rtx val, mem; | |
5711 | enum memmodel model; | |
5712 | ||
5713 | model = get_memmodel (CALL_EXPR_ARG (exp, 2)); | |
1cd6e20d | 5714 | |
5715 | if (!flag_inline_atomics) | |
5716 | return NULL_RTX; | |
5717 | ||
5718 | /* Expand the operands. */ | |
5719 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
5720 | val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); | |
5721 | ||
7821cde1 | 5722 | return expand_atomic_exchange (target, mem, val, model); |
1cd6e20d | 5723 | } |
5724 | ||
5725 | /* Expand the __atomic_compare_exchange intrinsic: | |
5726 | bool __atomic_compare_exchange (TYPE *object, TYPE *expect, | |
5727 | TYPE desired, BOOL weak, | |
5728 | enum memmodel success, | |
5729 | enum memmodel failure) | |
5730 | EXP is the CALL_EXPR. | |
5731 | TARGET is an optional place for us to store the results. */ | |
5732 | ||
5733 | static rtx | |
3754d046 | 5734 | expand_builtin_atomic_compare_exchange (machine_mode mode, tree exp, |
1cd6e20d | 5735 | rtx target) |
5736 | { | |
1e0c0b35 | 5737 | rtx expect, desired, mem, oldval; |
5738 | rtx_code_label *label; | |
1cd6e20d | 5739 | enum memmodel success, failure; |
5740 | tree weak; | |
5741 | bool is_weak; | |
2cb724f9 | 5742 | source_location loc |
5743 | = expansion_point_location_if_in_system_header (input_location); | |
1cd6e20d | 5744 | |
5745 | success = get_memmodel (CALL_EXPR_ARG (exp, 4)); | |
5746 | failure = get_memmodel (CALL_EXPR_ARG (exp, 5)); | |
5747 | ||
086f4e33 | 5748 | if (failure > success) |
5749 | { | |
2cb724f9 | 5750 | warning_at (loc, OPT_Winvalid_memory_model, |
5751 | "failure memory model cannot be stronger than success " | |
5752 | "memory model for %<__atomic_compare_exchange%>"); | |
086f4e33 | 5753 | success = MEMMODEL_SEQ_CST; |
5754 | } | |
5755 | ||
a372f7ca | 5756 | if (is_mm_release (failure) || is_mm_acq_rel (failure)) |
1cd6e20d | 5757 | { |
2cb724f9 | 5758 | warning_at (loc, OPT_Winvalid_memory_model, |
5759 | "invalid failure memory model for " | |
5760 | "%<__atomic_compare_exchange%>"); | |
086f4e33 | 5761 | failure = MEMMODEL_SEQ_CST; |
5762 | success = MEMMODEL_SEQ_CST; | |
1cd6e20d | 5763 | } |
5764 | ||
086f4e33 | 5765 | |
1cd6e20d | 5766 | if (!flag_inline_atomics) |
5767 | return NULL_RTX; | |
5768 | ||
5769 | /* Expand the operands. */ | |
5770 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
5771 | ||
5772 | expect = expand_normal (CALL_EXPR_ARG (exp, 1)); | |
5773 | expect = convert_memory_address (Pmode, expect); | |
c401b131 | 5774 | expect = gen_rtx_MEM (mode, expect); |
1cd6e20d | 5775 | desired = expand_expr_force_mode (CALL_EXPR_ARG (exp, 2), mode); |
5776 | ||
5777 | weak = CALL_EXPR_ARG (exp, 3); | |
5778 | is_weak = false; | |
e913b5cd | 5779 | if (tree_fits_shwi_p (weak) && tree_to_shwi (weak) != 0) |
1cd6e20d | 5780 | is_weak = true; |
5781 | ||
d86e3752 | 5782 | if (target == const0_rtx) |
5783 | target = NULL; | |
d86e3752 | 5784 | |
3c29a9ea | 5785 | /* Lest the rtl backend create a race condition with an imporoper store |
5786 | to memory, always create a new pseudo for OLDVAL. */ | |
5787 | oldval = NULL; | |
5788 | ||
5789 | if (!expand_atomic_compare_and_swap (&target, &oldval, mem, expect, desired, | |
ba885f6a | 5790 | is_weak, success, failure)) |
1cd6e20d | 5791 | return NULL_RTX; |
5792 | ||
d86e3752 | 5793 | /* Conditionally store back to EXPECT, lest we create a race condition |
5794 | with an improper store to memory. */ | |
5795 | /* ??? With a rearrangement of atomics at the gimple level, we can handle | |
5796 | the normal case where EXPECT is totally private, i.e. a register. At | |
5797 | which point the store can be unconditional. */ | |
5798 | label = gen_label_rtx (); | |
62589f76 | 5799 | emit_cmp_and_jump_insns (target, const0_rtx, NE, NULL, |
5800 | GET_MODE (target), 1, label); | |
d86e3752 | 5801 | emit_move_insn (expect, oldval); |
5802 | emit_label (label); | |
c401b131 | 5803 | |
1cd6e20d | 5804 | return target; |
5805 | } | |
5806 | ||
5a5ef659 | 5807 | /* Helper function for expand_ifn_atomic_compare_exchange - expand |
5808 | internal ATOMIC_COMPARE_EXCHANGE call into __atomic_compare_exchange_N | |
5809 | call. The weak parameter must be dropped to match the expected parameter | |
5810 | list and the expected argument changed from value to pointer to memory | |
5811 | slot. */ | |
5812 | ||
5813 | static void | |
5814 | expand_ifn_atomic_compare_exchange_into_call (gcall *call, machine_mode mode) | |
5815 | { | |
5816 | unsigned int z; | |
5817 | vec<tree, va_gc> *vec; | |
5818 | ||
5819 | vec_alloc (vec, 5); | |
5820 | vec->quick_push (gimple_call_arg (call, 0)); | |
5821 | tree expected = gimple_call_arg (call, 1); | |
5822 | rtx x = assign_stack_temp_for_type (mode, GET_MODE_SIZE (mode), | |
5823 | TREE_TYPE (expected)); | |
5824 | rtx expd = expand_expr (expected, x, mode, EXPAND_NORMAL); | |
5825 | if (expd != x) | |
5826 | emit_move_insn (x, expd); | |
5827 | tree v = make_tree (TREE_TYPE (expected), x); | |
5828 | vec->quick_push (build1 (ADDR_EXPR, | |
5829 | build_pointer_type (TREE_TYPE (expected)), v)); | |
5830 | vec->quick_push (gimple_call_arg (call, 2)); | |
5831 | /* Skip the boolean weak parameter. */ | |
5832 | for (z = 4; z < 6; z++) | |
5833 | vec->quick_push (gimple_call_arg (call, z)); | |
5834 | built_in_function fncode | |
5835 | = (built_in_function) ((int) BUILT_IN_ATOMIC_COMPARE_EXCHANGE_1 | |
5836 | + exact_log2 (GET_MODE_SIZE (mode))); | |
5837 | tree fndecl = builtin_decl_explicit (fncode); | |
5838 | tree fn = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fndecl)), | |
5839 | fndecl); | |
5840 | tree exp = build_call_vec (boolean_type_node, fn, vec); | |
5841 | tree lhs = gimple_call_lhs (call); | |
5842 | rtx boolret = expand_call (exp, NULL_RTX, lhs == NULL_TREE); | |
5843 | if (lhs) | |
5844 | { | |
5845 | rtx target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE); | |
5846 | if (GET_MODE (boolret) != mode) | |
5847 | boolret = convert_modes (mode, GET_MODE (boolret), boolret, 1); | |
5848 | x = force_reg (mode, x); | |
5849 | write_complex_part (target, boolret, true); | |
5850 | write_complex_part (target, x, false); | |
5851 | } | |
5852 | } | |
5853 | ||
5854 | /* Expand IFN_ATOMIC_COMPARE_EXCHANGE internal function. */ | |
5855 | ||
5856 | void | |
5857 | expand_ifn_atomic_compare_exchange (gcall *call) | |
5858 | { | |
5859 | int size = tree_to_shwi (gimple_call_arg (call, 3)) & 255; | |
5860 | gcc_assert (size == 1 || size == 2 || size == 4 || size == 8 || size == 16); | |
5861 | machine_mode mode = mode_for_size (BITS_PER_UNIT * size, MODE_INT, 0); | |
5862 | rtx expect, desired, mem, oldval, boolret; | |
5863 | enum memmodel success, failure; | |
5864 | tree lhs; | |
5865 | bool is_weak; | |
5866 | source_location loc | |
5867 | = expansion_point_location_if_in_system_header (gimple_location (call)); | |
5868 | ||
5869 | success = get_memmodel (gimple_call_arg (call, 4)); | |
5870 | failure = get_memmodel (gimple_call_arg (call, 5)); | |
5871 | ||
5872 | if (failure > success) | |
5873 | { | |
5874 | warning_at (loc, OPT_Winvalid_memory_model, | |
5875 | "failure memory model cannot be stronger than success " | |
5876 | "memory model for %<__atomic_compare_exchange%>"); | |
5877 | success = MEMMODEL_SEQ_CST; | |
5878 | } | |
5879 | ||
5880 | if (is_mm_release (failure) || is_mm_acq_rel (failure)) | |
5881 | { | |
5882 | warning_at (loc, OPT_Winvalid_memory_model, | |
5883 | "invalid failure memory model for " | |
5884 | "%<__atomic_compare_exchange%>"); | |
5885 | failure = MEMMODEL_SEQ_CST; | |
5886 | success = MEMMODEL_SEQ_CST; | |
5887 | } | |
5888 | ||
5889 | if (!flag_inline_atomics) | |
5890 | { | |
5891 | expand_ifn_atomic_compare_exchange_into_call (call, mode); | |
5892 | return; | |
5893 | } | |
5894 | ||
5895 | /* Expand the operands. */ | |
5896 | mem = get_builtin_sync_mem (gimple_call_arg (call, 0), mode); | |
5897 | ||
5898 | expect = expand_expr_force_mode (gimple_call_arg (call, 1), mode); | |
5899 | desired = expand_expr_force_mode (gimple_call_arg (call, 2), mode); | |
5900 | ||
5901 | is_weak = (tree_to_shwi (gimple_call_arg (call, 3)) & 256) != 0; | |
5902 | ||
5903 | boolret = NULL; | |
5904 | oldval = NULL; | |
5905 | ||
5906 | if (!expand_atomic_compare_and_swap (&boolret, &oldval, mem, expect, desired, | |
5907 | is_weak, success, failure)) | |
5908 | { | |
5909 | expand_ifn_atomic_compare_exchange_into_call (call, mode); | |
5910 | return; | |
5911 | } | |
5912 | ||
5913 | lhs = gimple_call_lhs (call); | |
5914 | if (lhs) | |
5915 | { | |
5916 | rtx target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE); | |
5917 | if (GET_MODE (boolret) != mode) | |
5918 | boolret = convert_modes (mode, GET_MODE (boolret), boolret, 1); | |
5919 | write_complex_part (target, boolret, true); | |
5920 | write_complex_part (target, oldval, false); | |
5921 | } | |
5922 | } | |
5923 | ||
1cd6e20d | 5924 | /* Expand the __atomic_load intrinsic: |
5925 | TYPE __atomic_load (TYPE *object, enum memmodel) | |
5926 | EXP is the CALL_EXPR. | |
5927 | TARGET is an optional place for us to store the results. */ | |
5928 | ||
5929 | static rtx | |
3754d046 | 5930 | expand_builtin_atomic_load (machine_mode mode, tree exp, rtx target) |
1cd6e20d | 5931 | { |
5932 | rtx mem; | |
5933 | enum memmodel model; | |
5934 | ||
5935 | model = get_memmodel (CALL_EXPR_ARG (exp, 1)); | |
a372f7ca | 5936 | if (is_mm_release (model) || is_mm_acq_rel (model)) |
1cd6e20d | 5937 | { |
2cb724f9 | 5938 | source_location loc |
5939 | = expansion_point_location_if_in_system_header (input_location); | |
5940 | warning_at (loc, OPT_Winvalid_memory_model, | |
5941 | "invalid memory model for %<__atomic_load%>"); | |
086f4e33 | 5942 | model = MEMMODEL_SEQ_CST; |
1cd6e20d | 5943 | } |
5944 | ||
5945 | if (!flag_inline_atomics) | |
5946 | return NULL_RTX; | |
5947 | ||
5948 | /* Expand the operand. */ | |
5949 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
5950 | ||
5951 | return expand_atomic_load (target, mem, model); | |
5952 | } | |
5953 | ||
5954 | ||
5955 | /* Expand the __atomic_store intrinsic: | |
5956 | void __atomic_store (TYPE *object, TYPE desired, enum memmodel) | |
5957 | EXP is the CALL_EXPR. | |
5958 | TARGET is an optional place for us to store the results. */ | |
5959 | ||
5960 | static rtx | |
3754d046 | 5961 | expand_builtin_atomic_store (machine_mode mode, tree exp) |
1cd6e20d | 5962 | { |
5963 | rtx mem, val; | |
5964 | enum memmodel model; | |
5965 | ||
5966 | model = get_memmodel (CALL_EXPR_ARG (exp, 2)); | |
a372f7ca | 5967 | if (!(is_mm_relaxed (model) || is_mm_seq_cst (model) |
5968 | || is_mm_release (model))) | |
1cd6e20d | 5969 | { |
2cb724f9 | 5970 | source_location loc |
5971 | = expansion_point_location_if_in_system_header (input_location); | |
5972 | warning_at (loc, OPT_Winvalid_memory_model, | |
5973 | "invalid memory model for %<__atomic_store%>"); | |
086f4e33 | 5974 | model = MEMMODEL_SEQ_CST; |
1cd6e20d | 5975 | } |
5976 | ||
5977 | if (!flag_inline_atomics) | |
5978 | return NULL_RTX; | |
5979 | ||
5980 | /* Expand the operands. */ | |
5981 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
5982 | val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); | |
5983 | ||
8808bf16 | 5984 | return expand_atomic_store (mem, val, model, false); |
1cd6e20d | 5985 | } |
5986 | ||
5987 | /* Expand the __atomic_fetch_XXX intrinsic: | |
5988 | TYPE __atomic_fetch_XXX (TYPE *object, TYPE val, enum memmodel) | |
5989 | EXP is the CALL_EXPR. | |
5990 | TARGET is an optional place for us to store the results. | |
5991 | CODE is the operation, PLUS, MINUS, ADD, XOR, or IOR. | |
5992 | FETCH_AFTER is true if returning the result of the operation. | |
5993 | FETCH_AFTER is false if returning the value before the operation. | |
5994 | IGNORE is true if the result is not used. | |
5995 | EXT_CALL is the correct builtin for an external call if this cannot be | |
5996 | resolved to an instruction sequence. */ | |
5997 | ||
5998 | static rtx | |
3754d046 | 5999 | expand_builtin_atomic_fetch_op (machine_mode mode, tree exp, rtx target, |
1cd6e20d | 6000 | enum rtx_code code, bool fetch_after, |
6001 | bool ignore, enum built_in_function ext_call) | |
6002 | { | |
6003 | rtx val, mem, ret; | |
6004 | enum memmodel model; | |
6005 | tree fndecl; | |
6006 | tree addr; | |
6007 | ||
6008 | model = get_memmodel (CALL_EXPR_ARG (exp, 2)); | |
6009 | ||
6010 | /* Expand the operands. */ | |
6011 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
6012 | val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); | |
6013 | ||
6014 | /* Only try generating instructions if inlining is turned on. */ | |
6015 | if (flag_inline_atomics) | |
6016 | { | |
6017 | ret = expand_atomic_fetch_op (target, mem, val, code, model, fetch_after); | |
6018 | if (ret) | |
6019 | return ret; | |
6020 | } | |
6021 | ||
6022 | /* Return if a different routine isn't needed for the library call. */ | |
6023 | if (ext_call == BUILT_IN_NONE) | |
6024 | return NULL_RTX; | |
6025 | ||
6026 | /* Change the call to the specified function. */ | |
6027 | fndecl = get_callee_fndecl (exp); | |
6028 | addr = CALL_EXPR_FN (exp); | |
6029 | STRIP_NOPS (addr); | |
6030 | ||
6031 | gcc_assert (TREE_OPERAND (addr, 0) == fndecl); | |
9af5ce0c | 6032 | TREE_OPERAND (addr, 0) = builtin_decl_explicit (ext_call); |
1cd6e20d | 6033 | |
a2f95d97 | 6034 | /* If we will emit code after the call, the call can not be a tail call. |
6035 | If it is emitted as a tail call, a barrier is emitted after it, and | |
6036 | then all trailing code is removed. */ | |
6037 | if (!ignore) | |
6038 | CALL_EXPR_TAILCALL (exp) = 0; | |
6039 | ||
1cd6e20d | 6040 | /* Expand the call here so we can emit trailing code. */ |
6041 | ret = expand_call (exp, target, ignore); | |
6042 | ||
6043 | /* Replace the original function just in case it matters. */ | |
6044 | TREE_OPERAND (addr, 0) = fndecl; | |
6045 | ||
6046 | /* Then issue the arithmetic correction to return the right result. */ | |
6047 | if (!ignore) | |
c449f851 | 6048 | { |
6049 | if (code == NOT) | |
6050 | { | |
6051 | ret = expand_simple_binop (mode, AND, ret, val, NULL_RTX, true, | |
6052 | OPTAB_LIB_WIDEN); | |
6053 | ret = expand_simple_unop (mode, NOT, ret, target, true); | |
6054 | } | |
6055 | else | |
6056 | ret = expand_simple_binop (mode, code, ret, val, target, true, | |
6057 | OPTAB_LIB_WIDEN); | |
6058 | } | |
1cd6e20d | 6059 | return ret; |
6060 | } | |
6061 | ||
9c1a31e4 | 6062 | /* Expand IFN_ATOMIC_BIT_TEST_AND_* internal function. */ |
6063 | ||
6064 | void | |
6065 | expand_ifn_atomic_bit_test_and (gcall *call) | |
6066 | { | |
6067 | tree ptr = gimple_call_arg (call, 0); | |
6068 | tree bit = gimple_call_arg (call, 1); | |
6069 | tree flag = gimple_call_arg (call, 2); | |
6070 | tree lhs = gimple_call_lhs (call); | |
6071 | enum memmodel model = MEMMODEL_SYNC_SEQ_CST; | |
6072 | machine_mode mode = TYPE_MODE (TREE_TYPE (flag)); | |
6073 | enum rtx_code code; | |
6074 | optab optab; | |
6075 | struct expand_operand ops[5]; | |
6076 | ||
6077 | gcc_assert (flag_inline_atomics); | |
6078 | ||
6079 | if (gimple_call_num_args (call) == 4) | |
6080 | model = get_memmodel (gimple_call_arg (call, 3)); | |
6081 | ||
6082 | rtx mem = get_builtin_sync_mem (ptr, mode); | |
6083 | rtx val = expand_expr_force_mode (bit, mode); | |
6084 | ||
6085 | switch (gimple_call_internal_fn (call)) | |
6086 | { | |
6087 | case IFN_ATOMIC_BIT_TEST_AND_SET: | |
6088 | code = IOR; | |
6089 | optab = atomic_bit_test_and_set_optab; | |
6090 | break; | |
6091 | case IFN_ATOMIC_BIT_TEST_AND_COMPLEMENT: | |
6092 | code = XOR; | |
6093 | optab = atomic_bit_test_and_complement_optab; | |
6094 | break; | |
6095 | case IFN_ATOMIC_BIT_TEST_AND_RESET: | |
6096 | code = AND; | |
6097 | optab = atomic_bit_test_and_reset_optab; | |
6098 | break; | |
6099 | default: | |
6100 | gcc_unreachable (); | |
6101 | } | |
6102 | ||
6103 | if (lhs == NULL_TREE) | |
6104 | { | |
6105 | val = expand_simple_binop (mode, ASHIFT, const1_rtx, | |
6106 | val, NULL_RTX, true, OPTAB_DIRECT); | |
6107 | if (code == AND) | |
6108 | val = expand_simple_unop (mode, NOT, val, NULL_RTX, true); | |
6109 | expand_atomic_fetch_op (const0_rtx, mem, val, code, model, false); | |
6110 | return; | |
6111 | } | |
6112 | ||
6113 | rtx target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE); | |
6114 | enum insn_code icode = direct_optab_handler (optab, mode); | |
6115 | gcc_assert (icode != CODE_FOR_nothing); | |
6116 | create_output_operand (&ops[0], target, mode); | |
6117 | create_fixed_operand (&ops[1], mem); | |
6118 | create_convert_operand_to (&ops[2], val, mode, true); | |
6119 | create_integer_operand (&ops[3], model); | |
6120 | create_integer_operand (&ops[4], integer_onep (flag)); | |
6121 | if (maybe_expand_insn (icode, 5, ops)) | |
6122 | return; | |
6123 | ||
6124 | rtx bitval = val; | |
6125 | val = expand_simple_binop (mode, ASHIFT, const1_rtx, | |
6126 | val, NULL_RTX, true, OPTAB_DIRECT); | |
6127 | rtx maskval = val; | |
6128 | if (code == AND) | |
6129 | val = expand_simple_unop (mode, NOT, val, NULL_RTX, true); | |
6130 | rtx result = expand_atomic_fetch_op (gen_reg_rtx (mode), mem, val, | |
6131 | code, model, false); | |
6132 | if (integer_onep (flag)) | |
6133 | { | |
6134 | result = expand_simple_binop (mode, ASHIFTRT, result, bitval, | |
6135 | NULL_RTX, true, OPTAB_DIRECT); | |
6136 | result = expand_simple_binop (mode, AND, result, const1_rtx, target, | |
6137 | true, OPTAB_DIRECT); | |
6138 | } | |
6139 | else | |
6140 | result = expand_simple_binop (mode, AND, result, maskval, target, true, | |
6141 | OPTAB_DIRECT); | |
6142 | if (result != target) | |
6143 | emit_move_insn (target, result); | |
6144 | } | |
6145 | ||
10b744a3 | 6146 | /* Expand an atomic clear operation. |
6147 | void _atomic_clear (BOOL *obj, enum memmodel) | |
6148 | EXP is the call expression. */ | |
6149 | ||
6150 | static rtx | |
6151 | expand_builtin_atomic_clear (tree exp) | |
6152 | { | |
3754d046 | 6153 | machine_mode mode; |
10b744a3 | 6154 | rtx mem, ret; |
6155 | enum memmodel model; | |
6156 | ||
6157 | mode = mode_for_size (BOOL_TYPE_SIZE, MODE_INT, 0); | |
6158 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
6159 | model = get_memmodel (CALL_EXPR_ARG (exp, 1)); | |
6160 | ||
a372f7ca | 6161 | if (is_mm_consume (model) || is_mm_acquire (model) || is_mm_acq_rel (model)) |
10b744a3 | 6162 | { |
2cb724f9 | 6163 | source_location loc |
6164 | = expansion_point_location_if_in_system_header (input_location); | |
6165 | warning_at (loc, OPT_Winvalid_memory_model, | |
6166 | "invalid memory model for %<__atomic_store%>"); | |
086f4e33 | 6167 | model = MEMMODEL_SEQ_CST; |
10b744a3 | 6168 | } |
6169 | ||
6170 | /* Try issuing an __atomic_store, and allow fallback to __sync_lock_release. | |
6171 | Failing that, a store is issued by __atomic_store. The only way this can | |
6172 | fail is if the bool type is larger than a word size. Unlikely, but | |
6173 | handle it anyway for completeness. Assume a single threaded model since | |
6174 | there is no atomic support in this case, and no barriers are required. */ | |
6175 | ret = expand_atomic_store (mem, const0_rtx, model, true); | |
6176 | if (!ret) | |
6177 | emit_move_insn (mem, const0_rtx); | |
6178 | return const0_rtx; | |
6179 | } | |
6180 | ||
6181 | /* Expand an atomic test_and_set operation. | |
6182 | bool _atomic_test_and_set (BOOL *obj, enum memmodel) | |
6183 | EXP is the call expression. */ | |
6184 | ||
6185 | static rtx | |
7821cde1 | 6186 | expand_builtin_atomic_test_and_set (tree exp, rtx target) |
10b744a3 | 6187 | { |
7821cde1 | 6188 | rtx mem; |
10b744a3 | 6189 | enum memmodel model; |
3754d046 | 6190 | machine_mode mode; |
10b744a3 | 6191 | |
6192 | mode = mode_for_size (BOOL_TYPE_SIZE, MODE_INT, 0); | |
6193 | mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); | |
6194 | model = get_memmodel (CALL_EXPR_ARG (exp, 1)); | |
6195 | ||
7821cde1 | 6196 | return expand_atomic_test_and_set (target, mem, model); |
10b744a3 | 6197 | } |
6198 | ||
6199 | ||
1cd6e20d | 6200 | /* Return true if (optional) argument ARG1 of size ARG0 is always lock free on |
6201 | this architecture. If ARG1 is NULL, use typical alignment for size ARG0. */ | |
6202 | ||
6203 | static tree | |
6204 | fold_builtin_atomic_always_lock_free (tree arg0, tree arg1) | |
6205 | { | |
6206 | int size; | |
3754d046 | 6207 | machine_mode mode; |
1cd6e20d | 6208 | unsigned int mode_align, type_align; |
6209 | ||
6210 | if (TREE_CODE (arg0) != INTEGER_CST) | |
6211 | return NULL_TREE; | |
b6a5fc45 | 6212 | |
1cd6e20d | 6213 | size = INTVAL (expand_normal (arg0)) * BITS_PER_UNIT; |
6214 | mode = mode_for_size (size, MODE_INT, 0); | |
6215 | mode_align = GET_MODE_ALIGNMENT (mode); | |
6216 | ||
4ca99588 | 6217 | if (TREE_CODE (arg1) == INTEGER_CST) |
6218 | { | |
6219 | unsigned HOST_WIDE_INT val = UINTVAL (expand_normal (arg1)); | |
6220 | ||
6221 | /* Either this argument is null, or it's a fake pointer encoding | |
6222 | the alignment of the object. */ | |
ac29ece2 | 6223 | val = least_bit_hwi (val); |
4ca99588 | 6224 | val *= BITS_PER_UNIT; |
6225 | ||
6226 | if (val == 0 || mode_align < val) | |
6227 | type_align = mode_align; | |
6228 | else | |
6229 | type_align = val; | |
6230 | } | |
1cd6e20d | 6231 | else |
6232 | { | |
6233 | tree ttype = TREE_TYPE (arg1); | |
6234 | ||
6235 | /* This function is usually invoked and folded immediately by the front | |
6236 | end before anything else has a chance to look at it. The pointer | |
6237 | parameter at this point is usually cast to a void *, so check for that | |
6238 | and look past the cast. */ | |
2f8a2ead | 6239 | if (CONVERT_EXPR_P (arg1) |
6240 | && POINTER_TYPE_P (ttype) | |
6241 | && VOID_TYPE_P (TREE_TYPE (ttype)) | |
6242 | && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (arg1, 0)))) | |
1cd6e20d | 6243 | arg1 = TREE_OPERAND (arg1, 0); |
6244 | ||
6245 | ttype = TREE_TYPE (arg1); | |
6246 | gcc_assert (POINTER_TYPE_P (ttype)); | |
6247 | ||
6248 | /* Get the underlying type of the object. */ | |
6249 | ttype = TREE_TYPE (ttype); | |
6250 | type_align = TYPE_ALIGN (ttype); | |
6251 | } | |
6252 | ||
47ae02b7 | 6253 | /* If the object has smaller alignment, the lock free routines cannot |
1cd6e20d | 6254 | be used. */ |
6255 | if (type_align < mode_align) | |
06308d2a | 6256 | return boolean_false_node; |
1cd6e20d | 6257 | |
6258 | /* Check if a compare_and_swap pattern exists for the mode which represents | |
6259 | the required size. The pattern is not allowed to fail, so the existence | |
d5f5fa27 | 6260 | of the pattern indicates support is present. Also require that an |
6261 | atomic load exists for the required size. */ | |
6262 | if (can_compare_and_swap_p (mode, true) && can_atomic_load_p (mode)) | |
06308d2a | 6263 | return boolean_true_node; |
1cd6e20d | 6264 | else |
06308d2a | 6265 | return boolean_false_node; |
1cd6e20d | 6266 | } |
6267 | ||
6268 | /* Return true if the parameters to call EXP represent an object which will | |
6269 | always generate lock free instructions. The first argument represents the | |
6270 | size of the object, and the second parameter is a pointer to the object | |
6271 | itself. If NULL is passed for the object, then the result is based on | |
6272 | typical alignment for an object of the specified size. Otherwise return | |
6273 | false. */ | |
6274 | ||
6275 | static rtx | |
6276 | expand_builtin_atomic_always_lock_free (tree exp) | |
6277 | { | |
6278 | tree size; | |
6279 | tree arg0 = CALL_EXPR_ARG (exp, 0); | |
6280 | tree arg1 = CALL_EXPR_ARG (exp, 1); | |
6281 | ||
6282 | if (TREE_CODE (arg0) != INTEGER_CST) | |
6283 | { | |
6284 | error ("non-constant argument 1 to __atomic_always_lock_free"); | |
6285 | return const0_rtx; | |
6286 | } | |
6287 | ||
6288 | size = fold_builtin_atomic_always_lock_free (arg0, arg1); | |
06308d2a | 6289 | if (size == boolean_true_node) |
1cd6e20d | 6290 | return const1_rtx; |
6291 | return const0_rtx; | |
6292 | } | |
6293 | ||
6294 | /* Return a one or zero if it can be determined that object ARG1 of size ARG | |
6295 | is lock free on this architecture. */ | |
6296 | ||
6297 | static tree | |
6298 | fold_builtin_atomic_is_lock_free (tree arg0, tree arg1) | |
6299 | { | |
6300 | if (!flag_inline_atomics) | |
6301 | return NULL_TREE; | |
6302 | ||
6303 | /* If it isn't always lock free, don't generate a result. */ | |
06308d2a | 6304 | if (fold_builtin_atomic_always_lock_free (arg0, arg1) == boolean_true_node) |
6305 | return boolean_true_node; | |
1cd6e20d | 6306 | |
6307 | return NULL_TREE; | |
6308 | } | |
6309 | ||
6310 | /* Return true if the parameters to call EXP represent an object which will | |
6311 | always generate lock free instructions. The first argument represents the | |
6312 | size of the object, and the second parameter is a pointer to the object | |
6313 | itself. If NULL is passed for the object, then the result is based on | |
6314 | typical alignment for an object of the specified size. Otherwise return | |
6315 | NULL*/ | |
6316 | ||
6317 | static rtx | |
6318 | expand_builtin_atomic_is_lock_free (tree exp) | |
6319 | { | |
6320 | tree size; | |
6321 | tree arg0 = CALL_EXPR_ARG (exp, 0); | |
6322 | tree arg1 = CALL_EXPR_ARG (exp, 1); | |
6323 | ||
6324 | if (!INTEGRAL_TYPE_P (TREE_TYPE (arg0))) | |
6325 | { | |
6326 | error ("non-integer argument 1 to __atomic_is_lock_free"); | |
6327 | return NULL_RTX; | |
6328 | } | |
6329 | ||
6330 | if (!flag_inline_atomics) | |
6331 | return NULL_RTX; | |
6332 | ||
6333 | /* If the value is known at compile time, return the RTX for it. */ | |
6334 | size = fold_builtin_atomic_is_lock_free (arg0, arg1); | |
06308d2a | 6335 | if (size == boolean_true_node) |
1cd6e20d | 6336 | return const1_rtx; |
6337 | ||
6338 | return NULL_RTX; | |
6339 | } | |
6340 | ||
1cd6e20d | 6341 | /* Expand the __atomic_thread_fence intrinsic: |
6342 | void __atomic_thread_fence (enum memmodel) | |
6343 | EXP is the CALL_EXPR. */ | |
6344 | ||
6345 | static void | |
6346 | expand_builtin_atomic_thread_fence (tree exp) | |
6347 | { | |
fe54c06b | 6348 | enum memmodel model = get_memmodel (CALL_EXPR_ARG (exp, 0)); |
6349 | expand_mem_thread_fence (model); | |
1cd6e20d | 6350 | } |
6351 | ||
6352 | /* Expand the __atomic_signal_fence intrinsic: | |
6353 | void __atomic_signal_fence (enum memmodel) | |
6354 | EXP is the CALL_EXPR. */ | |
6355 | ||
6356 | static void | |
6357 | expand_builtin_atomic_signal_fence (tree exp) | |
6358 | { | |
fe54c06b | 6359 | enum memmodel model = get_memmodel (CALL_EXPR_ARG (exp, 0)); |
6360 | expand_mem_signal_fence (model); | |
b6a5fc45 | 6361 | } |
6362 | ||
6363 | /* Expand the __sync_synchronize intrinsic. */ | |
6364 | ||
6365 | static void | |
2797f13a | 6366 | expand_builtin_sync_synchronize (void) |
b6a5fc45 | 6367 | { |
a372f7ca | 6368 | expand_mem_thread_fence (MEMMODEL_SYNC_SEQ_CST); |
b6a5fc45 | 6369 | } |
6370 | ||
badaa04c | 6371 | static rtx |
6372 | expand_builtin_thread_pointer (tree exp, rtx target) | |
6373 | { | |
6374 | enum insn_code icode; | |
6375 | if (!validate_arglist (exp, VOID_TYPE)) | |
6376 | return const0_rtx; | |
6377 | icode = direct_optab_handler (get_thread_pointer_optab, Pmode); | |
6378 | if (icode != CODE_FOR_nothing) | |
6379 | { | |
6380 | struct expand_operand op; | |
3ed779c3 | 6381 | /* If the target is not sutitable then create a new target. */ |
6382 | if (target == NULL_RTX | |
6383 | || !REG_P (target) | |
6384 | || GET_MODE (target) != Pmode) | |
badaa04c | 6385 | target = gen_reg_rtx (Pmode); |
6386 | create_output_operand (&op, target, Pmode); | |
6387 | expand_insn (icode, 1, &op); | |
6388 | return target; | |
6389 | } | |
6390 | error ("__builtin_thread_pointer is not supported on this target"); | |
6391 | return const0_rtx; | |
6392 | } | |
6393 | ||
6394 | static void | |
6395 | expand_builtin_set_thread_pointer (tree exp) | |
6396 | { | |
6397 | enum insn_code icode; | |
6398 | if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) | |
6399 | return; | |
6400 | icode = direct_optab_handler (set_thread_pointer_optab, Pmode); | |
6401 | if (icode != CODE_FOR_nothing) | |
6402 | { | |
6403 | struct expand_operand op; | |
6404 | rtx val = expand_expr (CALL_EXPR_ARG (exp, 0), NULL_RTX, | |
6405 | Pmode, EXPAND_NORMAL); | |
6f343c10 | 6406 | create_input_operand (&op, val, Pmode); |
badaa04c | 6407 | expand_insn (icode, 1, &op); |
6408 | return; | |
6409 | } | |
6410 | error ("__builtin_set_thread_pointer is not supported on this target"); | |
6411 | } | |
6412 | ||
53800dbe | 6413 | \f |
0e80b01d | 6414 | /* Emit code to restore the current value of stack. */ |
6415 | ||
6416 | static void | |
6417 | expand_stack_restore (tree var) | |
6418 | { | |
1e0c0b35 | 6419 | rtx_insn *prev; |
6420 | rtx sa = expand_normal (var); | |
0e80b01d | 6421 | |
6422 | sa = convert_memory_address (Pmode, sa); | |
6423 | ||
6424 | prev = get_last_insn (); | |
6425 | emit_stack_restore (SAVE_BLOCK, sa); | |
97354ae4 | 6426 | |
6427 | record_new_stack_level (); | |
6428 | ||
0e80b01d | 6429 | fixup_args_size_notes (prev, get_last_insn (), 0); |
6430 | } | |
6431 | ||
0e80b01d | 6432 | /* Emit code to save the current value of stack. */ |
6433 | ||
6434 | static rtx | |
6435 | expand_stack_save (void) | |
6436 | { | |
6437 | rtx ret = NULL_RTX; | |
6438 | ||
0e80b01d | 6439 | emit_stack_save (SAVE_BLOCK, &ret); |
6440 | return ret; | |
6441 | } | |
6442 | ||
ca4c3545 | 6443 | |
53800dbe | 6444 | /* Expand an expression EXP that calls a built-in function, |
6445 | with result going to TARGET if that's convenient | |
6446 | (and in mode MODE if that's convenient). | |
6447 | SUBTARGET may be used as the target for computing one of EXP's operands. | |
6448 | IGNORE is nonzero if the value is to be ignored. */ | |
6449 | ||
6450 | rtx | |
3754d046 | 6451 | expand_builtin (tree exp, rtx target, rtx subtarget, machine_mode mode, |
aecda0d6 | 6452 | int ignore) |
53800dbe | 6453 | { |
c6e6ecb1 | 6454 | tree fndecl = get_callee_fndecl (exp); |
53800dbe | 6455 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); |
3754d046 | 6456 | machine_mode target_mode = TYPE_MODE (TREE_TYPE (exp)); |
67fa4078 | 6457 | int flags; |
53800dbe | 6458 | |
4e2f4ed5 | 6459 | if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD) |
6460 | return targetm.expand_builtin (exp, target, subtarget, mode, ignore); | |
6461 | ||
f9acf11a | 6462 | /* When ASan is enabled, we don't want to expand some memory/string |
6463 | builtins and rely on libsanitizer's hooks. This allows us to avoid | |
6464 | redundant checks and be sure, that possible overflow will be detected | |
6465 | by ASan. */ | |
6466 | ||
6467 | if ((flag_sanitize & SANITIZE_ADDRESS) && asan_intercepted_p (fcode)) | |
6468 | return expand_call (exp, target, ignore); | |
6469 | ||
53800dbe | 6470 | /* When not optimizing, generate calls to library functions for a certain |
6471 | set of builtins. */ | |
cd9ff771 | 6472 | if (!optimize |
b6a5fc45 | 6473 | && !called_as_built_in (fndecl) |
73037a1e | 6474 | && fcode != BUILT_IN_FORK |
6475 | && fcode != BUILT_IN_EXECL | |
6476 | && fcode != BUILT_IN_EXECV | |
6477 | && fcode != BUILT_IN_EXECLP | |
6478 | && fcode != BUILT_IN_EXECLE | |
6479 | && fcode != BUILT_IN_EXECVP | |
6480 | && fcode != BUILT_IN_EXECVE | |
2c281b15 | 6481 | && fcode != BUILT_IN_ALLOCA |
581bf1c2 | 6482 | && fcode != BUILT_IN_ALLOCA_WITH_ALIGN |
058a1b7a | 6483 | && fcode != BUILT_IN_FREE |
6484 | && fcode != BUILT_IN_CHKP_SET_PTR_BOUNDS | |
6485 | && fcode != BUILT_IN_CHKP_INIT_PTR_BOUNDS | |
6486 | && fcode != BUILT_IN_CHKP_NULL_PTR_BOUNDS | |
6487 | && fcode != BUILT_IN_CHKP_COPY_PTR_BOUNDS | |
6488 | && fcode != BUILT_IN_CHKP_NARROW_PTR_BOUNDS | |
6489 | && fcode != BUILT_IN_CHKP_STORE_PTR_BOUNDS | |
6490 | && fcode != BUILT_IN_CHKP_CHECK_PTR_LBOUNDS | |
6491 | && fcode != BUILT_IN_CHKP_CHECK_PTR_UBOUNDS | |
6492 | && fcode != BUILT_IN_CHKP_CHECK_PTR_BOUNDS | |
6493 | && fcode != BUILT_IN_CHKP_GET_PTR_LBOUND | |
6494 | && fcode != BUILT_IN_CHKP_GET_PTR_UBOUND | |
6495 | && fcode != BUILT_IN_CHKP_BNDRET) | |
cd9ff771 | 6496 | return expand_call (exp, target, ignore); |
53800dbe | 6497 | |
8d6d7930 | 6498 | /* The built-in function expanders test for target == const0_rtx |
6499 | to determine whether the function's result will be ignored. */ | |
6500 | if (ignore) | |
6501 | target = const0_rtx; | |
6502 | ||
6503 | /* If the result of a pure or const built-in function is ignored, and | |
6504 | none of its arguments are volatile, we can avoid expanding the | |
6505 | built-in call and just evaluate the arguments for side-effects. */ | |
6506 | if (target == const0_rtx | |
67fa4078 | 6507 | && ((flags = flags_from_decl_or_type (fndecl)) & (ECF_CONST | ECF_PURE)) |
6508 | && !(flags & ECF_LOOPING_CONST_OR_PURE)) | |
8d6d7930 | 6509 | { |
6510 | bool volatilep = false; | |
6511 | tree arg; | |
c2f47e15 | 6512 | call_expr_arg_iterator iter; |
8d6d7930 | 6513 | |
c2f47e15 | 6514 | FOR_EACH_CALL_EXPR_ARG (arg, iter, exp) |
6515 | if (TREE_THIS_VOLATILE (arg)) | |
8d6d7930 | 6516 | { |
6517 | volatilep = true; | |
6518 | break; | |
6519 | } | |
6520 | ||
6521 | if (! volatilep) | |
6522 | { | |
c2f47e15 | 6523 | FOR_EACH_CALL_EXPR_ARG (arg, iter, exp) |
6524 | expand_expr (arg, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
8d6d7930 | 6525 | return const0_rtx; |
6526 | } | |
6527 | } | |
6528 | ||
f21337ef | 6529 | /* expand_builtin_with_bounds is supposed to be used for |
6530 | instrumented builtin calls. */ | |
058a1b7a | 6531 | gcc_assert (!CALL_WITH_BOUNDS_P (exp)); |
6532 | ||
53800dbe | 6533 | switch (fcode) |
6534 | { | |
4f35b1fc | 6535 | CASE_FLT_FN (BUILT_IN_FABS): |
012f068a | 6536 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FABS): |
8aa32773 | 6537 | case BUILT_IN_FABSD32: |
6538 | case BUILT_IN_FABSD64: | |
6539 | case BUILT_IN_FABSD128: | |
c2f47e15 | 6540 | target = expand_builtin_fabs (exp, target, subtarget); |
78a74442 | 6541 | if (target) |
a0c938f0 | 6542 | return target; |
78a74442 | 6543 | break; |
6544 | ||
4f35b1fc | 6545 | CASE_FLT_FN (BUILT_IN_COPYSIGN): |
012f068a | 6546 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_COPYSIGN): |
c2f47e15 | 6547 | target = expand_builtin_copysign (exp, target, subtarget); |
270436f3 | 6548 | if (target) |
6549 | return target; | |
6550 | break; | |
6551 | ||
7d3f6cc7 | 6552 | /* Just do a normal library call if we were unable to fold |
6553 | the values. */ | |
4f35b1fc | 6554 | CASE_FLT_FN (BUILT_IN_CABS): |
78a74442 | 6555 | break; |
53800dbe | 6556 | |
7e0713b1 | 6557 | CASE_FLT_FN (BUILT_IN_FMA): |
6558 | target = expand_builtin_mathfn_ternary (exp, target, subtarget); | |
6559 | if (target) | |
6560 | return target; | |
6561 | break; | |
6562 | ||
a67a90e5 | 6563 | CASE_FLT_FN (BUILT_IN_ILOGB): |
6564 | if (! flag_unsafe_math_optimizations) | |
6565 | break; | |
12f08300 | 6566 | gcc_fallthrough (); |
6567 | CASE_FLT_FN (BUILT_IN_ISINF): | |
6568 | CASE_FLT_FN (BUILT_IN_FINITE): | |
6569 | case BUILT_IN_ISFINITE: | |
6570 | case BUILT_IN_ISNORMAL: | |
f97eea22 | 6571 | target = expand_builtin_interclass_mathfn (exp, target); |
a67a90e5 | 6572 | if (target) |
6573 | return target; | |
6574 | break; | |
6575 | ||
80ff6494 | 6576 | CASE_FLT_FN (BUILT_IN_ICEIL): |
4f35b1fc | 6577 | CASE_FLT_FN (BUILT_IN_LCEIL): |
6578 | CASE_FLT_FN (BUILT_IN_LLCEIL): | |
6579 | CASE_FLT_FN (BUILT_IN_LFLOOR): | |
80ff6494 | 6580 | CASE_FLT_FN (BUILT_IN_IFLOOR): |
4f35b1fc | 6581 | CASE_FLT_FN (BUILT_IN_LLFLOOR): |
ff1b14e4 | 6582 | target = expand_builtin_int_roundingfn (exp, target); |
ad52b9b7 | 6583 | if (target) |
6584 | return target; | |
6585 | break; | |
6586 | ||
80ff6494 | 6587 | CASE_FLT_FN (BUILT_IN_IRINT): |
7d3afc77 | 6588 | CASE_FLT_FN (BUILT_IN_LRINT): |
6589 | CASE_FLT_FN (BUILT_IN_LLRINT): | |
80ff6494 | 6590 | CASE_FLT_FN (BUILT_IN_IROUND): |
ef2f1a10 | 6591 | CASE_FLT_FN (BUILT_IN_LROUND): |
6592 | CASE_FLT_FN (BUILT_IN_LLROUND): | |
ff1b14e4 | 6593 | target = expand_builtin_int_roundingfn_2 (exp, target); |
7d3afc77 | 6594 | if (target) |
6595 | return target; | |
6596 | break; | |
6597 | ||
4f35b1fc | 6598 | CASE_FLT_FN (BUILT_IN_POWI): |
f97eea22 | 6599 | target = expand_builtin_powi (exp, target); |
757c219d | 6600 | if (target) |
6601 | return target; | |
6602 | break; | |
6603 | ||
d735c391 | 6604 | CASE_FLT_FN (BUILT_IN_CEXPI): |
f97eea22 | 6605 | target = expand_builtin_cexpi (exp, target); |
d735c391 | 6606 | gcc_assert (target); |
6607 | return target; | |
6608 | ||
4f35b1fc | 6609 | CASE_FLT_FN (BUILT_IN_SIN): |
6610 | CASE_FLT_FN (BUILT_IN_COS): | |
6b43bae4 | 6611 | if (! flag_unsafe_math_optimizations) |
6612 | break; | |
6613 | target = expand_builtin_mathfn_3 (exp, target, subtarget); | |
6614 | if (target) | |
6615 | return target; | |
6616 | break; | |
6617 | ||
c3147c1a | 6618 | CASE_FLT_FN (BUILT_IN_SINCOS): |
6619 | if (! flag_unsafe_math_optimizations) | |
6620 | break; | |
6621 | target = expand_builtin_sincos (exp); | |
6622 | if (target) | |
6623 | return target; | |
6624 | break; | |
6625 | ||
53800dbe | 6626 | case BUILT_IN_APPLY_ARGS: |
6627 | return expand_builtin_apply_args (); | |
6628 | ||
6629 | /* __builtin_apply (FUNCTION, ARGUMENTS, ARGSIZE) invokes | |
6630 | FUNCTION with a copy of the parameters described by | |
6631 | ARGUMENTS, and ARGSIZE. It returns a block of memory | |
6632 | allocated on the stack into which is stored all the registers | |
6633 | that might possibly be used for returning the result of a | |
6634 | function. ARGUMENTS is the value returned by | |
6635 | __builtin_apply_args. ARGSIZE is the number of bytes of | |
6636 | arguments that must be copied. ??? How should this value be | |
6637 | computed? We'll also need a safe worst case value for varargs | |
6638 | functions. */ | |
6639 | case BUILT_IN_APPLY: | |
c2f47e15 | 6640 | if (!validate_arglist (exp, POINTER_TYPE, |
0eb671f7 | 6641 | POINTER_TYPE, INTEGER_TYPE, VOID_TYPE) |
c2f47e15 | 6642 | && !validate_arglist (exp, REFERENCE_TYPE, |
0eb671f7 | 6643 | POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
53800dbe | 6644 | return const0_rtx; |
6645 | else | |
6646 | { | |
53800dbe | 6647 | rtx ops[3]; |
6648 | ||
c2f47e15 | 6649 | ops[0] = expand_normal (CALL_EXPR_ARG (exp, 0)); |
6650 | ops[1] = expand_normal (CALL_EXPR_ARG (exp, 1)); | |
6651 | ops[2] = expand_normal (CALL_EXPR_ARG (exp, 2)); | |
53800dbe | 6652 | |
6653 | return expand_builtin_apply (ops[0], ops[1], ops[2]); | |
6654 | } | |
6655 | ||
6656 | /* __builtin_return (RESULT) causes the function to return the | |
6657 | value described by RESULT. RESULT is address of the block of | |
6658 | memory returned by __builtin_apply. */ | |
6659 | case BUILT_IN_RETURN: | |
c2f47e15 | 6660 | if (validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) |
6661 | expand_builtin_return (expand_normal (CALL_EXPR_ARG (exp, 0))); | |
53800dbe | 6662 | return const0_rtx; |
6663 | ||
6664 | case BUILT_IN_SAVEREGS: | |
a66c9326 | 6665 | return expand_builtin_saveregs (); |
53800dbe | 6666 | |
48dc2227 | 6667 | case BUILT_IN_VA_ARG_PACK: |
6668 | /* All valid uses of __builtin_va_arg_pack () are removed during | |
6669 | inlining. */ | |
b8c23db3 | 6670 | error ("%Kinvalid use of %<__builtin_va_arg_pack ()%>", exp); |
48dc2227 | 6671 | return const0_rtx; |
6672 | ||
4e1d7ea4 | 6673 | case BUILT_IN_VA_ARG_PACK_LEN: |
6674 | /* All valid uses of __builtin_va_arg_pack_len () are removed during | |
6675 | inlining. */ | |
b8c23db3 | 6676 | error ("%Kinvalid use of %<__builtin_va_arg_pack_len ()%>", exp); |
4e1d7ea4 | 6677 | return const0_rtx; |
6678 | ||
53800dbe | 6679 | /* Return the address of the first anonymous stack arg. */ |
6680 | case BUILT_IN_NEXT_ARG: | |
c2f47e15 | 6681 | if (fold_builtin_next_arg (exp, false)) |
a0c938f0 | 6682 | return const0_rtx; |
79012a9d | 6683 | return expand_builtin_next_arg (); |
53800dbe | 6684 | |
ac8fb6db | 6685 | case BUILT_IN_CLEAR_CACHE: |
6686 | target = expand_builtin___clear_cache (exp); | |
6687 | if (target) | |
6688 | return target; | |
6689 | break; | |
6690 | ||
53800dbe | 6691 | case BUILT_IN_CLASSIFY_TYPE: |
c2f47e15 | 6692 | return expand_builtin_classify_type (exp); |
53800dbe | 6693 | |
6694 | case BUILT_IN_CONSTANT_P: | |
4ee9c684 | 6695 | return const0_rtx; |
53800dbe | 6696 | |
6697 | case BUILT_IN_FRAME_ADDRESS: | |
6698 | case BUILT_IN_RETURN_ADDRESS: | |
c2f47e15 | 6699 | return expand_builtin_frame_address (fndecl, exp); |
53800dbe | 6700 | |
6701 | /* Returns the address of the area where the structure is returned. | |
6702 | 0 otherwise. */ | |
6703 | case BUILT_IN_AGGREGATE_INCOMING_ADDRESS: | |
c2f47e15 | 6704 | if (call_expr_nargs (exp) != 0 |
9342ee68 | 6705 | || ! AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl))) |
e16ceb8e | 6706 | || !MEM_P (DECL_RTL (DECL_RESULT (current_function_decl)))) |
9342ee68 | 6707 | return const0_rtx; |
53800dbe | 6708 | else |
9342ee68 | 6709 | return XEXP (DECL_RTL (DECL_RESULT (current_function_decl)), 0); |
53800dbe | 6710 | |
6711 | case BUILT_IN_ALLOCA: | |
581bf1c2 | 6712 | case BUILT_IN_ALLOCA_WITH_ALIGN: |
2b29cc6a | 6713 | target = expand_builtin_alloca (exp); |
53800dbe | 6714 | if (target) |
6715 | return target; | |
6716 | break; | |
6717 | ||
d08919a7 | 6718 | case BUILT_IN_ASAN_ALLOCAS_UNPOISON: |
6719 | return expand_asan_emit_allocas_unpoison (exp); | |
6720 | ||
4ee9c684 | 6721 | case BUILT_IN_STACK_SAVE: |
6722 | return expand_stack_save (); | |
6723 | ||
6724 | case BUILT_IN_STACK_RESTORE: | |
c2f47e15 | 6725 | expand_stack_restore (CALL_EXPR_ARG (exp, 0)); |
4ee9c684 | 6726 | return const0_rtx; |
6727 | ||
74bdbe96 | 6728 | case BUILT_IN_BSWAP16: |
42791117 | 6729 | case BUILT_IN_BSWAP32: |
6730 | case BUILT_IN_BSWAP64: | |
74bdbe96 | 6731 | target = expand_builtin_bswap (target_mode, exp, target, subtarget); |
42791117 | 6732 | if (target) |
6733 | return target; | |
6734 | break; | |
6735 | ||
4f35b1fc | 6736 | CASE_INT_FN (BUILT_IN_FFS): |
c2f47e15 | 6737 | target = expand_builtin_unop (target_mode, exp, target, |
efb070c8 | 6738 | subtarget, ffs_optab); |
6a08d0ab | 6739 | if (target) |
6740 | return target; | |
6741 | break; | |
6742 | ||
4f35b1fc | 6743 | CASE_INT_FN (BUILT_IN_CLZ): |
c2f47e15 | 6744 | target = expand_builtin_unop (target_mode, exp, target, |
efb070c8 | 6745 | subtarget, clz_optab); |
6a08d0ab | 6746 | if (target) |
6747 | return target; | |
6748 | break; | |
6749 | ||
4f35b1fc | 6750 | CASE_INT_FN (BUILT_IN_CTZ): |
c2f47e15 | 6751 | target = expand_builtin_unop (target_mode, exp, target, |
efb070c8 | 6752 | subtarget, ctz_optab); |
6a08d0ab | 6753 | if (target) |
6754 | return target; | |
6755 | break; | |
6756 | ||
d8492bd3 | 6757 | CASE_INT_FN (BUILT_IN_CLRSB): |
d8492bd3 | 6758 | target = expand_builtin_unop (target_mode, exp, target, |
6759 | subtarget, clrsb_optab); | |
6760 | if (target) | |
6761 | return target; | |
6762 | break; | |
6763 | ||
4f35b1fc | 6764 | CASE_INT_FN (BUILT_IN_POPCOUNT): |
c2f47e15 | 6765 | target = expand_builtin_unop (target_mode, exp, target, |
efb070c8 | 6766 | subtarget, popcount_optab); |
6a08d0ab | 6767 | if (target) |
6768 | return target; | |
6769 | break; | |
6770 | ||
4f35b1fc | 6771 | CASE_INT_FN (BUILT_IN_PARITY): |
c2f47e15 | 6772 | target = expand_builtin_unop (target_mode, exp, target, |
efb070c8 | 6773 | subtarget, parity_optab); |
53800dbe | 6774 | if (target) |
6775 | return target; | |
6776 | break; | |
6777 | ||
6778 | case BUILT_IN_STRLEN: | |
c2f47e15 | 6779 | target = expand_builtin_strlen (exp, target, target_mode); |
53800dbe | 6780 | if (target) |
6781 | return target; | |
6782 | break; | |
6783 | ||
5aef8938 | 6784 | case BUILT_IN_STRCAT: |
6785 | target = expand_builtin_strcat (exp, target); | |
6786 | if (target) | |
6787 | return target; | |
6788 | break; | |
6789 | ||
53800dbe | 6790 | case BUILT_IN_STRCPY: |
a65c4d64 | 6791 | target = expand_builtin_strcpy (exp, target); |
53800dbe | 6792 | if (target) |
6793 | return target; | |
6794 | break; | |
bf8e3599 | 6795 | |
5aef8938 | 6796 | case BUILT_IN_STRNCAT: |
6797 | target = expand_builtin_strncat (exp, target); | |
6798 | if (target) | |
6799 | return target; | |
6800 | break; | |
6801 | ||
ed09096d | 6802 | case BUILT_IN_STRNCPY: |
a65c4d64 | 6803 | target = expand_builtin_strncpy (exp, target); |
ed09096d | 6804 | if (target) |
6805 | return target; | |
6806 | break; | |
bf8e3599 | 6807 | |
3b824fa6 | 6808 | case BUILT_IN_STPCPY: |
dc369150 | 6809 | target = expand_builtin_stpcpy (exp, target, mode); |
3b824fa6 | 6810 | if (target) |
6811 | return target; | |
6812 | break; | |
6813 | ||
4d317237 | 6814 | case BUILT_IN_STPNCPY: |
6815 | target = expand_builtin_stpncpy (exp, target); | |
6816 | if (target) | |
6817 | return target; | |
6818 | break; | |
6819 | ||
8d6c6ef5 | 6820 | case BUILT_IN_MEMCHR: |
6821 | target = expand_builtin_memchr (exp, target); | |
6822 | if (target) | |
6823 | return target; | |
6824 | break; | |
6825 | ||
53800dbe | 6826 | case BUILT_IN_MEMCPY: |
a65c4d64 | 6827 | target = expand_builtin_memcpy (exp, target); |
3b824fa6 | 6828 | if (target) |
6829 | return target; | |
6830 | break; | |
6831 | ||
4d317237 | 6832 | case BUILT_IN_MEMMOVE: |
6833 | target = expand_builtin_memmove (exp, target); | |
6834 | if (target) | |
6835 | return target; | |
6836 | break; | |
6837 | ||
3b824fa6 | 6838 | case BUILT_IN_MEMPCPY: |
d0fbba1a | 6839 | target = expand_builtin_mempcpy (exp, target); |
53800dbe | 6840 | if (target) |
6841 | return target; | |
6842 | break; | |
6843 | ||
6844 | case BUILT_IN_MEMSET: | |
c2f47e15 | 6845 | target = expand_builtin_memset (exp, target, mode); |
53800dbe | 6846 | if (target) |
6847 | return target; | |
6848 | break; | |
6849 | ||
ffc83088 | 6850 | case BUILT_IN_BZERO: |
0b25db21 | 6851 | target = expand_builtin_bzero (exp); |
ffc83088 | 6852 | if (target) |
6853 | return target; | |
6854 | break; | |
6855 | ||
53800dbe | 6856 | case BUILT_IN_STRCMP: |
a65c4d64 | 6857 | target = expand_builtin_strcmp (exp, target); |
53800dbe | 6858 | if (target) |
6859 | return target; | |
6860 | break; | |
6861 | ||
ed09096d | 6862 | case BUILT_IN_STRNCMP: |
6863 | target = expand_builtin_strncmp (exp, target, mode); | |
6864 | if (target) | |
6865 | return target; | |
6866 | break; | |
6867 | ||
071f1696 | 6868 | case BUILT_IN_BCMP: |
53800dbe | 6869 | case BUILT_IN_MEMCMP: |
3e346f54 | 6870 | case BUILT_IN_MEMCMP_EQ: |
6871 | target = expand_builtin_memcmp (exp, target, fcode == BUILT_IN_MEMCMP_EQ); | |
53800dbe | 6872 | if (target) |
6873 | return target; | |
3e346f54 | 6874 | if (fcode == BUILT_IN_MEMCMP_EQ) |
6875 | { | |
6876 | tree newdecl = builtin_decl_explicit (BUILT_IN_MEMCMP); | |
6877 | TREE_OPERAND (exp, 1) = build_fold_addr_expr (newdecl); | |
6878 | } | |
53800dbe | 6879 | break; |
53800dbe | 6880 | |
6881 | case BUILT_IN_SETJMP: | |
12f08300 | 6882 | /* This should have been lowered to the builtins below. */ |
2c8a1497 | 6883 | gcc_unreachable (); |
6884 | ||
6885 | case BUILT_IN_SETJMP_SETUP: | |
6886 | /* __builtin_setjmp_setup is passed a pointer to an array of five words | |
6887 | and the receiver label. */ | |
c2f47e15 | 6888 | if (validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)) |
2c8a1497 | 6889 | { |
c2f47e15 | 6890 | rtx buf_addr = expand_expr (CALL_EXPR_ARG (exp, 0), subtarget, |
2c8a1497 | 6891 | VOIDmode, EXPAND_NORMAL); |
c2f47e15 | 6892 | tree label = TREE_OPERAND (CALL_EXPR_ARG (exp, 1), 0); |
9ed997be | 6893 | rtx_insn *label_r = label_rtx (label); |
2c8a1497 | 6894 | |
6895 | /* This is copied from the handling of non-local gotos. */ | |
6896 | expand_builtin_setjmp_setup (buf_addr, label_r); | |
6897 | nonlocal_goto_handler_labels | |
a4de1c23 | 6898 | = gen_rtx_INSN_LIST (VOIDmode, label_r, |
2c8a1497 | 6899 | nonlocal_goto_handler_labels); |
6900 | /* ??? Do not let expand_label treat us as such since we would | |
6901 | not want to be both on the list of non-local labels and on | |
6902 | the list of forced labels. */ | |
6903 | FORCED_LABEL (label) = 0; | |
6904 | return const0_rtx; | |
6905 | } | |
6906 | break; | |
6907 | ||
2c8a1497 | 6908 | case BUILT_IN_SETJMP_RECEIVER: |
6909 | /* __builtin_setjmp_receiver is passed the receiver label. */ | |
c2f47e15 | 6910 | if (validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) |
2c8a1497 | 6911 | { |
c2f47e15 | 6912 | tree label = TREE_OPERAND (CALL_EXPR_ARG (exp, 0), 0); |
9ed997be | 6913 | rtx_insn *label_r = label_rtx (label); |
2c8a1497 | 6914 | |
6915 | expand_builtin_setjmp_receiver (label_r); | |
6916 | return const0_rtx; | |
6917 | } | |
6b7f6858 | 6918 | break; |
53800dbe | 6919 | |
6920 | /* __builtin_longjmp is passed a pointer to an array of five words. | |
6921 | It's similar to the C library longjmp function but works with | |
6922 | __builtin_setjmp above. */ | |
6923 | case BUILT_IN_LONGJMP: | |
c2f47e15 | 6924 | if (validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
53800dbe | 6925 | { |
c2f47e15 | 6926 | rtx buf_addr = expand_expr (CALL_EXPR_ARG (exp, 0), subtarget, |
8ec3c5c2 | 6927 | VOIDmode, EXPAND_NORMAL); |
c2f47e15 | 6928 | rtx value = expand_normal (CALL_EXPR_ARG (exp, 1)); |
53800dbe | 6929 | |
6930 | if (value != const1_rtx) | |
6931 | { | |
1e5fcbe2 | 6932 | error ("%<__builtin_longjmp%> second argument must be 1"); |
53800dbe | 6933 | return const0_rtx; |
6934 | } | |
6935 | ||
6936 | expand_builtin_longjmp (buf_addr, value); | |
6937 | return const0_rtx; | |
6938 | } | |
2c8a1497 | 6939 | break; |
53800dbe | 6940 | |
4ee9c684 | 6941 | case BUILT_IN_NONLOCAL_GOTO: |
c2f47e15 | 6942 | target = expand_builtin_nonlocal_goto (exp); |
4ee9c684 | 6943 | if (target) |
6944 | return target; | |
6945 | break; | |
6946 | ||
843d08a9 | 6947 | /* This updates the setjmp buffer that is its argument with the value |
6948 | of the current stack pointer. */ | |
6949 | case BUILT_IN_UPDATE_SETJMP_BUF: | |
c2f47e15 | 6950 | if (validate_arglist (exp, POINTER_TYPE, VOID_TYPE)) |
843d08a9 | 6951 | { |
6952 | rtx buf_addr | |
c2f47e15 | 6953 | = expand_normal (CALL_EXPR_ARG (exp, 0)); |
843d08a9 | 6954 | |
6955 | expand_builtin_update_setjmp_buf (buf_addr); | |
6956 | return const0_rtx; | |
6957 | } | |
6958 | break; | |
6959 | ||
53800dbe | 6960 | case BUILT_IN_TRAP: |
a0ef1725 | 6961 | expand_builtin_trap (); |
53800dbe | 6962 | return const0_rtx; |
6963 | ||
d2b48f0c | 6964 | case BUILT_IN_UNREACHABLE: |
6965 | expand_builtin_unreachable (); | |
6966 | return const0_rtx; | |
6967 | ||
4f35b1fc | 6968 | CASE_FLT_FN (BUILT_IN_SIGNBIT): |
004e23c4 | 6969 | case BUILT_IN_SIGNBITD32: |
6970 | case BUILT_IN_SIGNBITD64: | |
6971 | case BUILT_IN_SIGNBITD128: | |
27f261ef | 6972 | target = expand_builtin_signbit (exp, target); |
6973 | if (target) | |
6974 | return target; | |
6975 | break; | |
6976 | ||
53800dbe | 6977 | /* Various hooks for the DWARF 2 __throw routine. */ |
6978 | case BUILT_IN_UNWIND_INIT: | |
6979 | expand_builtin_unwind_init (); | |
6980 | return const0_rtx; | |
6981 | case BUILT_IN_DWARF_CFA: | |
6982 | return virtual_cfa_rtx; | |
6983 | #ifdef DWARF2_UNWIND_INFO | |
f8f023a5 | 6984 | case BUILT_IN_DWARF_SP_COLUMN: |
6985 | return expand_builtin_dwarf_sp_column (); | |
695e919b | 6986 | case BUILT_IN_INIT_DWARF_REG_SIZES: |
c2f47e15 | 6987 | expand_builtin_init_dwarf_reg_sizes (CALL_EXPR_ARG (exp, 0)); |
695e919b | 6988 | return const0_rtx; |
53800dbe | 6989 | #endif |
6990 | case BUILT_IN_FROB_RETURN_ADDR: | |
c2f47e15 | 6991 | return expand_builtin_frob_return_addr (CALL_EXPR_ARG (exp, 0)); |
53800dbe | 6992 | case BUILT_IN_EXTRACT_RETURN_ADDR: |
c2f47e15 | 6993 | return expand_builtin_extract_return_addr (CALL_EXPR_ARG (exp, 0)); |
53800dbe | 6994 | case BUILT_IN_EH_RETURN: |
c2f47e15 | 6995 | expand_builtin_eh_return (CALL_EXPR_ARG (exp, 0), |
6996 | CALL_EXPR_ARG (exp, 1)); | |
53800dbe | 6997 | return const0_rtx; |
df4b504c | 6998 | case BUILT_IN_EH_RETURN_DATA_REGNO: |
c2f47e15 | 6999 | return expand_builtin_eh_return_data_regno (exp); |
26093bf4 | 7000 | case BUILT_IN_EXTEND_POINTER: |
c2f47e15 | 7001 | return expand_builtin_extend_pointer (CALL_EXPR_ARG (exp, 0)); |
e38def9c | 7002 | case BUILT_IN_EH_POINTER: |
7003 | return expand_builtin_eh_pointer (exp); | |
7004 | case BUILT_IN_EH_FILTER: | |
7005 | return expand_builtin_eh_filter (exp); | |
7006 | case BUILT_IN_EH_COPY_VALUES: | |
7007 | return expand_builtin_eh_copy_values (exp); | |
26093bf4 | 7008 | |
7ccc713a | 7009 | case BUILT_IN_VA_START: |
c2f47e15 | 7010 | return expand_builtin_va_start (exp); |
a66c9326 | 7011 | case BUILT_IN_VA_END: |
c2f47e15 | 7012 | return expand_builtin_va_end (exp); |
a66c9326 | 7013 | case BUILT_IN_VA_COPY: |
c2f47e15 | 7014 | return expand_builtin_va_copy (exp); |
89cfe6e5 | 7015 | case BUILT_IN_EXPECT: |
c2f47e15 | 7016 | return expand_builtin_expect (exp, target); |
fca0886c | 7017 | case BUILT_IN_ASSUME_ALIGNED: |
7018 | return expand_builtin_assume_aligned (exp, target); | |
5e3608d8 | 7019 | case BUILT_IN_PREFETCH: |
c2f47e15 | 7020 | expand_builtin_prefetch (exp); |
5e3608d8 | 7021 | return const0_rtx; |
7022 | ||
4ee9c684 | 7023 | case BUILT_IN_INIT_TRAMPOLINE: |
c307f106 | 7024 | return expand_builtin_init_trampoline (exp, true); |
7025 | case BUILT_IN_INIT_HEAP_TRAMPOLINE: | |
7026 | return expand_builtin_init_trampoline (exp, false); | |
4ee9c684 | 7027 | case BUILT_IN_ADJUST_TRAMPOLINE: |
c2f47e15 | 7028 | return expand_builtin_adjust_trampoline (exp); |
4ee9c684 | 7029 | |
a27e3913 | 7030 | case BUILT_IN_INIT_DESCRIPTOR: |
7031 | return expand_builtin_init_descriptor (exp); | |
7032 | case BUILT_IN_ADJUST_DESCRIPTOR: | |
7033 | return expand_builtin_adjust_descriptor (exp); | |
7034 | ||
73673831 | 7035 | case BUILT_IN_FORK: |
7036 | case BUILT_IN_EXECL: | |
7037 | case BUILT_IN_EXECV: | |
7038 | case BUILT_IN_EXECLP: | |
7039 | case BUILT_IN_EXECLE: | |
7040 | case BUILT_IN_EXECVP: | |
7041 | case BUILT_IN_EXECVE: | |
c2f47e15 | 7042 | target = expand_builtin_fork_or_exec (fndecl, exp, target, ignore); |
73673831 | 7043 | if (target) |
7044 | return target; | |
7045 | break; | |
53800dbe | 7046 | |
2797f13a | 7047 | case BUILT_IN_SYNC_FETCH_AND_ADD_1: |
7048 | case BUILT_IN_SYNC_FETCH_AND_ADD_2: | |
7049 | case BUILT_IN_SYNC_FETCH_AND_ADD_4: | |
7050 | case BUILT_IN_SYNC_FETCH_AND_ADD_8: | |
7051 | case BUILT_IN_SYNC_FETCH_AND_ADD_16: | |
7052 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_ADD_1); | |
1cd6e20d | 7053 | target = expand_builtin_sync_operation (mode, exp, PLUS, false, target); |
b6a5fc45 | 7054 | if (target) |
7055 | return target; | |
7056 | break; | |
7057 | ||
2797f13a | 7058 | case BUILT_IN_SYNC_FETCH_AND_SUB_1: |
7059 | case BUILT_IN_SYNC_FETCH_AND_SUB_2: | |
7060 | case BUILT_IN_SYNC_FETCH_AND_SUB_4: | |
7061 | case BUILT_IN_SYNC_FETCH_AND_SUB_8: | |
7062 | case BUILT_IN_SYNC_FETCH_AND_SUB_16: | |
7063 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_SUB_1); | |
1cd6e20d | 7064 | target = expand_builtin_sync_operation (mode, exp, MINUS, false, target); |
b6a5fc45 | 7065 | if (target) |
7066 | return target; | |
7067 | break; | |
7068 | ||
2797f13a | 7069 | case BUILT_IN_SYNC_FETCH_AND_OR_1: |
7070 | case BUILT_IN_SYNC_FETCH_AND_OR_2: | |
7071 | case BUILT_IN_SYNC_FETCH_AND_OR_4: | |
7072 | case BUILT_IN_SYNC_FETCH_AND_OR_8: | |
7073 | case BUILT_IN_SYNC_FETCH_AND_OR_16: | |
7074 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_OR_1); | |
1cd6e20d | 7075 | target = expand_builtin_sync_operation (mode, exp, IOR, false, target); |
b6a5fc45 | 7076 | if (target) |
7077 | return target; | |
7078 | break; | |
7079 | ||
2797f13a | 7080 | case BUILT_IN_SYNC_FETCH_AND_AND_1: |
7081 | case BUILT_IN_SYNC_FETCH_AND_AND_2: | |
7082 | case BUILT_IN_SYNC_FETCH_AND_AND_4: | |
7083 | case BUILT_IN_SYNC_FETCH_AND_AND_8: | |
7084 | case BUILT_IN_SYNC_FETCH_AND_AND_16: | |
7085 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_AND_1); | |
1cd6e20d | 7086 | target = expand_builtin_sync_operation (mode, exp, AND, false, target); |
b6a5fc45 | 7087 | if (target) |
7088 | return target; | |
7089 | break; | |
7090 | ||
2797f13a | 7091 | case BUILT_IN_SYNC_FETCH_AND_XOR_1: |
7092 | case BUILT_IN_SYNC_FETCH_AND_XOR_2: | |
7093 | case BUILT_IN_SYNC_FETCH_AND_XOR_4: | |
7094 | case BUILT_IN_SYNC_FETCH_AND_XOR_8: | |
7095 | case BUILT_IN_SYNC_FETCH_AND_XOR_16: | |
7096 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_XOR_1); | |
1cd6e20d | 7097 | target = expand_builtin_sync_operation (mode, exp, XOR, false, target); |
b6a5fc45 | 7098 | if (target) |
7099 | return target; | |
7100 | break; | |
7101 | ||
2797f13a | 7102 | case BUILT_IN_SYNC_FETCH_AND_NAND_1: |
7103 | case BUILT_IN_SYNC_FETCH_AND_NAND_2: | |
7104 | case BUILT_IN_SYNC_FETCH_AND_NAND_4: | |
7105 | case BUILT_IN_SYNC_FETCH_AND_NAND_8: | |
7106 | case BUILT_IN_SYNC_FETCH_AND_NAND_16: | |
7107 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_FETCH_AND_NAND_1); | |
1cd6e20d | 7108 | target = expand_builtin_sync_operation (mode, exp, NOT, false, target); |
b6a5fc45 | 7109 | if (target) |
7110 | return target; | |
7111 | break; | |
7112 | ||
2797f13a | 7113 | case BUILT_IN_SYNC_ADD_AND_FETCH_1: |
7114 | case BUILT_IN_SYNC_ADD_AND_FETCH_2: | |
7115 | case BUILT_IN_SYNC_ADD_AND_FETCH_4: | |
7116 | case BUILT_IN_SYNC_ADD_AND_FETCH_8: | |
7117 | case BUILT_IN_SYNC_ADD_AND_FETCH_16: | |
7118 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_ADD_AND_FETCH_1); | |
1cd6e20d | 7119 | target = expand_builtin_sync_operation (mode, exp, PLUS, true, target); |
b6a5fc45 | 7120 | if (target) |
7121 | return target; | |
7122 | break; | |
7123 | ||
2797f13a | 7124 | case BUILT_IN_SYNC_SUB_AND_FETCH_1: |
7125 | case BUILT_IN_SYNC_SUB_AND_FETCH_2: | |
7126 | case BUILT_IN_SYNC_SUB_AND_FETCH_4: | |
7127 | case BUILT_IN_SYNC_SUB_AND_FETCH_8: | |
7128 | case BUILT_IN_SYNC_SUB_AND_FETCH_16: | |
7129 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_SUB_AND_FETCH_1); | |
1cd6e20d | 7130 | target = expand_builtin_sync_operation (mode, exp, MINUS, true, target); |
b6a5fc45 | 7131 | if (target) |
7132 | return target; | |
7133 | break; | |
7134 | ||
2797f13a | 7135 | case BUILT_IN_SYNC_OR_AND_FETCH_1: |
7136 | case BUILT_IN_SYNC_OR_AND_FETCH_2: | |
7137 | case BUILT_IN_SYNC_OR_AND_FETCH_4: | |
7138 | case BUILT_IN_SYNC_OR_AND_FETCH_8: | |
7139 | case BUILT_IN_SYNC_OR_AND_FETCH_16: | |
7140 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_OR_AND_FETCH_1); | |
1cd6e20d | 7141 | target = expand_builtin_sync_operation (mode, exp, IOR, true, target); |
b6a5fc45 | 7142 | if (target) |
7143 | return target; | |
7144 | break; | |
7145 | ||
2797f13a | 7146 | case BUILT_IN_SYNC_AND_AND_FETCH_1: |
7147 | case BUILT_IN_SYNC_AND_AND_FETCH_2: | |
7148 | case BUILT_IN_SYNC_AND_AND_FETCH_4: | |
7149 | case BUILT_IN_SYNC_AND_AND_FETCH_8: | |
7150 | case BUILT_IN_SYNC_AND_AND_FETCH_16: | |
7151 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_AND_AND_FETCH_1); | |
1cd6e20d | 7152 | target = expand_builtin_sync_operation (mode, exp, AND, true, target); |
b6a5fc45 | 7153 | if (target) |
7154 | return target; | |
7155 | break; | |
7156 | ||
2797f13a | 7157 | case BUILT_IN_SYNC_XOR_AND_FETCH_1: |
7158 | case BUILT_IN_SYNC_XOR_AND_FETCH_2: | |
7159 | case BUILT_IN_SYNC_XOR_AND_FETCH_4: | |
7160 | case BUILT_IN_SYNC_XOR_AND_FETCH_8: | |
7161 | case BUILT_IN_SYNC_XOR_AND_FETCH_16: | |
7162 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_XOR_AND_FETCH_1); | |
1cd6e20d | 7163 | target = expand_builtin_sync_operation (mode, exp, XOR, true, target); |
b6a5fc45 | 7164 | if (target) |
7165 | return target; | |
7166 | break; | |
7167 | ||
2797f13a | 7168 | case BUILT_IN_SYNC_NAND_AND_FETCH_1: |
7169 | case BUILT_IN_SYNC_NAND_AND_FETCH_2: | |
7170 | case BUILT_IN_SYNC_NAND_AND_FETCH_4: | |
7171 | case BUILT_IN_SYNC_NAND_AND_FETCH_8: | |
7172 | case BUILT_IN_SYNC_NAND_AND_FETCH_16: | |
7173 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_NAND_AND_FETCH_1); | |
1cd6e20d | 7174 | target = expand_builtin_sync_operation (mode, exp, NOT, true, target); |
b6a5fc45 | 7175 | if (target) |
7176 | return target; | |
7177 | break; | |
7178 | ||
2797f13a | 7179 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_1: |
7180 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_2: | |
7181 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_4: | |
7182 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_8: | |
7183 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_16: | |
a601d32a | 7184 | if (mode == VOIDmode) |
7185 | mode = TYPE_MODE (boolean_type_node); | |
b6a5fc45 | 7186 | if (!target || !register_operand (target, mode)) |
7187 | target = gen_reg_rtx (mode); | |
3e272de8 | 7188 | |
2797f13a | 7189 | mode = get_builtin_sync_mode |
7190 | (fcode - BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_1); | |
c2f47e15 | 7191 | target = expand_builtin_compare_and_swap (mode, exp, true, target); |
b6a5fc45 | 7192 | if (target) |
7193 | return target; | |
7194 | break; | |
7195 | ||
2797f13a | 7196 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_1: |
7197 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_2: | |
7198 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_4: | |
7199 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_8: | |
7200 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_16: | |
7201 | mode = get_builtin_sync_mode | |
7202 | (fcode - BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_1); | |
c2f47e15 | 7203 | target = expand_builtin_compare_and_swap (mode, exp, false, target); |
b6a5fc45 | 7204 | if (target) |
7205 | return target; | |
7206 | break; | |
7207 | ||
2797f13a | 7208 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_1: |
7209 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_2: | |
7210 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_4: | |
7211 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_8: | |
7212 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_16: | |
7213 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_LOCK_TEST_AND_SET_1); | |
7214 | target = expand_builtin_sync_lock_test_and_set (mode, exp, target); | |
b6a5fc45 | 7215 | if (target) |
7216 | return target; | |
7217 | break; | |
7218 | ||
2797f13a | 7219 | case BUILT_IN_SYNC_LOCK_RELEASE_1: |
7220 | case BUILT_IN_SYNC_LOCK_RELEASE_2: | |
7221 | case BUILT_IN_SYNC_LOCK_RELEASE_4: | |
7222 | case BUILT_IN_SYNC_LOCK_RELEASE_8: | |
7223 | case BUILT_IN_SYNC_LOCK_RELEASE_16: | |
7224 | mode = get_builtin_sync_mode (fcode - BUILT_IN_SYNC_LOCK_RELEASE_1); | |
7225 | expand_builtin_sync_lock_release (mode, exp); | |
b6a5fc45 | 7226 | return const0_rtx; |
7227 | ||
2797f13a | 7228 | case BUILT_IN_SYNC_SYNCHRONIZE: |
7229 | expand_builtin_sync_synchronize (); | |
b6a5fc45 | 7230 | return const0_rtx; |
7231 | ||
1cd6e20d | 7232 | case BUILT_IN_ATOMIC_EXCHANGE_1: |
7233 | case BUILT_IN_ATOMIC_EXCHANGE_2: | |
7234 | case BUILT_IN_ATOMIC_EXCHANGE_4: | |
7235 | case BUILT_IN_ATOMIC_EXCHANGE_8: | |
7236 | case BUILT_IN_ATOMIC_EXCHANGE_16: | |
7237 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_EXCHANGE_1); | |
7238 | target = expand_builtin_atomic_exchange (mode, exp, target); | |
7239 | if (target) | |
7240 | return target; | |
7241 | break; | |
7242 | ||
7243 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_1: | |
7244 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_2: | |
7245 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_4: | |
7246 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_8: | |
7247 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_16: | |
2c201ad1 | 7248 | { |
7249 | unsigned int nargs, z; | |
f1f41a6c | 7250 | vec<tree, va_gc> *vec; |
2c201ad1 | 7251 | |
7252 | mode = | |
7253 | get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_COMPARE_EXCHANGE_1); | |
7254 | target = expand_builtin_atomic_compare_exchange (mode, exp, target); | |
7255 | if (target) | |
7256 | return target; | |
7257 | ||
7258 | /* If this is turned into an external library call, the weak parameter | |
7259 | must be dropped to match the expected parameter list. */ | |
7260 | nargs = call_expr_nargs (exp); | |
f1f41a6c | 7261 | vec_alloc (vec, nargs - 1); |
2c201ad1 | 7262 | for (z = 0; z < 3; z++) |
f1f41a6c | 7263 | vec->quick_push (CALL_EXPR_ARG (exp, z)); |
2c201ad1 | 7264 | /* Skip the boolean weak parameter. */ |
7265 | for (z = 4; z < 6; z++) | |
f1f41a6c | 7266 | vec->quick_push (CALL_EXPR_ARG (exp, z)); |
2c201ad1 | 7267 | exp = build_call_vec (TREE_TYPE (exp), CALL_EXPR_FN (exp), vec); |
7268 | break; | |
7269 | } | |
1cd6e20d | 7270 | |
7271 | case BUILT_IN_ATOMIC_LOAD_1: | |
7272 | case BUILT_IN_ATOMIC_LOAD_2: | |
7273 | case BUILT_IN_ATOMIC_LOAD_4: | |
7274 | case BUILT_IN_ATOMIC_LOAD_8: | |
7275 | case BUILT_IN_ATOMIC_LOAD_16: | |
7276 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_LOAD_1); | |
7277 | target = expand_builtin_atomic_load (mode, exp, target); | |
7278 | if (target) | |
7279 | return target; | |
7280 | break; | |
7281 | ||
7282 | case BUILT_IN_ATOMIC_STORE_1: | |
7283 | case BUILT_IN_ATOMIC_STORE_2: | |
7284 | case BUILT_IN_ATOMIC_STORE_4: | |
7285 | case BUILT_IN_ATOMIC_STORE_8: | |
7286 | case BUILT_IN_ATOMIC_STORE_16: | |
7287 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_STORE_1); | |
7288 | target = expand_builtin_atomic_store (mode, exp); | |
7289 | if (target) | |
7290 | return const0_rtx; | |
7291 | break; | |
7292 | ||
7293 | case BUILT_IN_ATOMIC_ADD_FETCH_1: | |
7294 | case BUILT_IN_ATOMIC_ADD_FETCH_2: | |
7295 | case BUILT_IN_ATOMIC_ADD_FETCH_4: | |
7296 | case BUILT_IN_ATOMIC_ADD_FETCH_8: | |
7297 | case BUILT_IN_ATOMIC_ADD_FETCH_16: | |
7298 | { | |
7299 | enum built_in_function lib; | |
7300 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_ADD_FETCH_1); | |
7301 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_ADD_1 + | |
7302 | (fcode - BUILT_IN_ATOMIC_ADD_FETCH_1)); | |
7303 | target = expand_builtin_atomic_fetch_op (mode, exp, target, PLUS, true, | |
7304 | ignore, lib); | |
7305 | if (target) | |
7306 | return target; | |
7307 | break; | |
7308 | } | |
7309 | case BUILT_IN_ATOMIC_SUB_FETCH_1: | |
7310 | case BUILT_IN_ATOMIC_SUB_FETCH_2: | |
7311 | case BUILT_IN_ATOMIC_SUB_FETCH_4: | |
7312 | case BUILT_IN_ATOMIC_SUB_FETCH_8: | |
7313 | case BUILT_IN_ATOMIC_SUB_FETCH_16: | |
7314 | { | |
7315 | enum built_in_function lib; | |
7316 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_SUB_FETCH_1); | |
7317 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_SUB_1 + | |
7318 | (fcode - BUILT_IN_ATOMIC_SUB_FETCH_1)); | |
7319 | target = expand_builtin_atomic_fetch_op (mode, exp, target, MINUS, true, | |
7320 | ignore, lib); | |
7321 | if (target) | |
7322 | return target; | |
7323 | break; | |
7324 | } | |
7325 | case BUILT_IN_ATOMIC_AND_FETCH_1: | |
7326 | case BUILT_IN_ATOMIC_AND_FETCH_2: | |
7327 | case BUILT_IN_ATOMIC_AND_FETCH_4: | |
7328 | case BUILT_IN_ATOMIC_AND_FETCH_8: | |
7329 | case BUILT_IN_ATOMIC_AND_FETCH_16: | |
7330 | { | |
7331 | enum built_in_function lib; | |
7332 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_AND_FETCH_1); | |
7333 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_AND_1 + | |
7334 | (fcode - BUILT_IN_ATOMIC_AND_FETCH_1)); | |
7335 | target = expand_builtin_atomic_fetch_op (mode, exp, target, AND, true, | |
7336 | ignore, lib); | |
7337 | if (target) | |
7338 | return target; | |
7339 | break; | |
7340 | } | |
7341 | case BUILT_IN_ATOMIC_NAND_FETCH_1: | |
7342 | case BUILT_IN_ATOMIC_NAND_FETCH_2: | |
7343 | case BUILT_IN_ATOMIC_NAND_FETCH_4: | |
7344 | case BUILT_IN_ATOMIC_NAND_FETCH_8: | |
7345 | case BUILT_IN_ATOMIC_NAND_FETCH_16: | |
7346 | { | |
7347 | enum built_in_function lib; | |
7348 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_NAND_FETCH_1); | |
7349 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_NAND_1 + | |
7350 | (fcode - BUILT_IN_ATOMIC_NAND_FETCH_1)); | |
7351 | target = expand_builtin_atomic_fetch_op (mode, exp, target, NOT, true, | |
7352 | ignore, lib); | |
7353 | if (target) | |
7354 | return target; | |
7355 | break; | |
7356 | } | |
7357 | case BUILT_IN_ATOMIC_XOR_FETCH_1: | |
7358 | case BUILT_IN_ATOMIC_XOR_FETCH_2: | |
7359 | case BUILT_IN_ATOMIC_XOR_FETCH_4: | |
7360 | case BUILT_IN_ATOMIC_XOR_FETCH_8: | |
7361 | case BUILT_IN_ATOMIC_XOR_FETCH_16: | |
7362 | { | |
7363 | enum built_in_function lib; | |
7364 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_XOR_FETCH_1); | |
7365 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_XOR_1 + | |
7366 | (fcode - BUILT_IN_ATOMIC_XOR_FETCH_1)); | |
7367 | target = expand_builtin_atomic_fetch_op (mode, exp, target, XOR, true, | |
7368 | ignore, lib); | |
7369 | if (target) | |
7370 | return target; | |
7371 | break; | |
7372 | } | |
7373 | case BUILT_IN_ATOMIC_OR_FETCH_1: | |
7374 | case BUILT_IN_ATOMIC_OR_FETCH_2: | |
7375 | case BUILT_IN_ATOMIC_OR_FETCH_4: | |
7376 | case BUILT_IN_ATOMIC_OR_FETCH_8: | |
7377 | case BUILT_IN_ATOMIC_OR_FETCH_16: | |
7378 | { | |
7379 | enum built_in_function lib; | |
7380 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_OR_FETCH_1); | |
7381 | lib = (enum built_in_function)((int)BUILT_IN_ATOMIC_FETCH_OR_1 + | |
7382 | (fcode - BUILT_IN_ATOMIC_OR_FETCH_1)); | |
7383 | target = expand_builtin_atomic_fetch_op (mode, exp, target, IOR, true, | |
7384 | ignore, lib); | |
7385 | if (target) | |
7386 | return target; | |
7387 | break; | |
7388 | } | |
7389 | case BUILT_IN_ATOMIC_FETCH_ADD_1: | |
7390 | case BUILT_IN_ATOMIC_FETCH_ADD_2: | |
7391 | case BUILT_IN_ATOMIC_FETCH_ADD_4: | |
7392 | case BUILT_IN_ATOMIC_FETCH_ADD_8: | |
7393 | case BUILT_IN_ATOMIC_FETCH_ADD_16: | |
7394 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_ADD_1); | |
7395 | target = expand_builtin_atomic_fetch_op (mode, exp, target, PLUS, false, | |
7396 | ignore, BUILT_IN_NONE); | |
7397 | if (target) | |
7398 | return target; | |
7399 | break; | |
7400 | ||
7401 | case BUILT_IN_ATOMIC_FETCH_SUB_1: | |
7402 | case BUILT_IN_ATOMIC_FETCH_SUB_2: | |
7403 | case BUILT_IN_ATOMIC_FETCH_SUB_4: | |
7404 | case BUILT_IN_ATOMIC_FETCH_SUB_8: | |
7405 | case BUILT_IN_ATOMIC_FETCH_SUB_16: | |
7406 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_SUB_1); | |
7407 | target = expand_builtin_atomic_fetch_op (mode, exp, target, MINUS, false, | |
7408 | ignore, BUILT_IN_NONE); | |
7409 | if (target) | |
7410 | return target; | |
7411 | break; | |
7412 | ||
7413 | case BUILT_IN_ATOMIC_FETCH_AND_1: | |
7414 | case BUILT_IN_ATOMIC_FETCH_AND_2: | |
7415 | case BUILT_IN_ATOMIC_FETCH_AND_4: | |
7416 | case BUILT_IN_ATOMIC_FETCH_AND_8: | |
7417 | case BUILT_IN_ATOMIC_FETCH_AND_16: | |
7418 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_AND_1); | |
7419 | target = expand_builtin_atomic_fetch_op (mode, exp, target, AND, false, | |
7420 | ignore, BUILT_IN_NONE); | |
7421 | if (target) | |
7422 | return target; | |
7423 | break; | |
7424 | ||
7425 | case BUILT_IN_ATOMIC_FETCH_NAND_1: | |
7426 | case BUILT_IN_ATOMIC_FETCH_NAND_2: | |
7427 | case BUILT_IN_ATOMIC_FETCH_NAND_4: | |
7428 | case BUILT_IN_ATOMIC_FETCH_NAND_8: | |
7429 | case BUILT_IN_ATOMIC_FETCH_NAND_16: | |
7430 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_NAND_1); | |
7431 | target = expand_builtin_atomic_fetch_op (mode, exp, target, NOT, false, | |
7432 | ignore, BUILT_IN_NONE); | |
7433 | if (target) | |
7434 | return target; | |
7435 | break; | |
7436 | ||
7437 | case BUILT_IN_ATOMIC_FETCH_XOR_1: | |
7438 | case BUILT_IN_ATOMIC_FETCH_XOR_2: | |
7439 | case BUILT_IN_ATOMIC_FETCH_XOR_4: | |
7440 | case BUILT_IN_ATOMIC_FETCH_XOR_8: | |
7441 | case BUILT_IN_ATOMIC_FETCH_XOR_16: | |
7442 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_XOR_1); | |
7443 | target = expand_builtin_atomic_fetch_op (mode, exp, target, XOR, false, | |
7444 | ignore, BUILT_IN_NONE); | |
7445 | if (target) | |
7446 | return target; | |
7447 | break; | |
7448 | ||
7449 | case BUILT_IN_ATOMIC_FETCH_OR_1: | |
7450 | case BUILT_IN_ATOMIC_FETCH_OR_2: | |
7451 | case BUILT_IN_ATOMIC_FETCH_OR_4: | |
7452 | case BUILT_IN_ATOMIC_FETCH_OR_8: | |
7453 | case BUILT_IN_ATOMIC_FETCH_OR_16: | |
7454 | mode = get_builtin_sync_mode (fcode - BUILT_IN_ATOMIC_FETCH_OR_1); | |
7455 | target = expand_builtin_atomic_fetch_op (mode, exp, target, IOR, false, | |
7456 | ignore, BUILT_IN_NONE); | |
7457 | if (target) | |
7458 | return target; | |
7459 | break; | |
10b744a3 | 7460 | |
7461 | case BUILT_IN_ATOMIC_TEST_AND_SET: | |
7821cde1 | 7462 | return expand_builtin_atomic_test_and_set (exp, target); |
10b744a3 | 7463 | |
7464 | case BUILT_IN_ATOMIC_CLEAR: | |
7465 | return expand_builtin_atomic_clear (exp); | |
1cd6e20d | 7466 | |
7467 | case BUILT_IN_ATOMIC_ALWAYS_LOCK_FREE: | |
7468 | return expand_builtin_atomic_always_lock_free (exp); | |
7469 | ||
7470 | case BUILT_IN_ATOMIC_IS_LOCK_FREE: | |
7471 | target = expand_builtin_atomic_is_lock_free (exp); | |
7472 | if (target) | |
7473 | return target; | |
7474 | break; | |
7475 | ||
7476 | case BUILT_IN_ATOMIC_THREAD_FENCE: | |
7477 | expand_builtin_atomic_thread_fence (exp); | |
7478 | return const0_rtx; | |
7479 | ||
7480 | case BUILT_IN_ATOMIC_SIGNAL_FENCE: | |
7481 | expand_builtin_atomic_signal_fence (exp); | |
7482 | return const0_rtx; | |
7483 | ||
0a39fd54 | 7484 | case BUILT_IN_OBJECT_SIZE: |
7485 | return expand_builtin_object_size (exp); | |
7486 | ||
7487 | case BUILT_IN_MEMCPY_CHK: | |
7488 | case BUILT_IN_MEMPCPY_CHK: | |
7489 | case BUILT_IN_MEMMOVE_CHK: | |
7490 | case BUILT_IN_MEMSET_CHK: | |
7491 | target = expand_builtin_memory_chk (exp, target, mode, fcode); | |
7492 | if (target) | |
7493 | return target; | |
7494 | break; | |
7495 | ||
7496 | case BUILT_IN_STRCPY_CHK: | |
7497 | case BUILT_IN_STPCPY_CHK: | |
7498 | case BUILT_IN_STRNCPY_CHK: | |
1063acde | 7499 | case BUILT_IN_STPNCPY_CHK: |
0a39fd54 | 7500 | case BUILT_IN_STRCAT_CHK: |
b356dfef | 7501 | case BUILT_IN_STRNCAT_CHK: |
0a39fd54 | 7502 | case BUILT_IN_SNPRINTF_CHK: |
7503 | case BUILT_IN_VSNPRINTF_CHK: | |
7504 | maybe_emit_chk_warning (exp, fcode); | |
7505 | break; | |
7506 | ||
7507 | case BUILT_IN_SPRINTF_CHK: | |
7508 | case BUILT_IN_VSPRINTF_CHK: | |
7509 | maybe_emit_sprintf_chk_warning (exp, fcode); | |
7510 | break; | |
7511 | ||
2c281b15 | 7512 | case BUILT_IN_FREE: |
f74ea1c2 | 7513 | if (warn_free_nonheap_object) |
7514 | maybe_emit_free_warning (exp); | |
2c281b15 | 7515 | break; |
7516 | ||
badaa04c | 7517 | case BUILT_IN_THREAD_POINTER: |
7518 | return expand_builtin_thread_pointer (exp, target); | |
7519 | ||
7520 | case BUILT_IN_SET_THREAD_POINTER: | |
7521 | expand_builtin_set_thread_pointer (exp); | |
7522 | return const0_rtx; | |
7523 | ||
d037099f | 7524 | case BUILT_IN_CILK_DETACH: |
7525 | expand_builtin_cilk_detach (exp); | |
7526 | return const0_rtx; | |
7527 | ||
7528 | case BUILT_IN_CILK_POP_FRAME: | |
7529 | expand_builtin_cilk_pop_frame (exp); | |
7530 | return const0_rtx; | |
7531 | ||
058a1b7a | 7532 | case BUILT_IN_CHKP_INIT_PTR_BOUNDS: |
7533 | case BUILT_IN_CHKP_NULL_PTR_BOUNDS: | |
7534 | case BUILT_IN_CHKP_COPY_PTR_BOUNDS: | |
7535 | case BUILT_IN_CHKP_CHECK_PTR_LBOUNDS: | |
7536 | case BUILT_IN_CHKP_CHECK_PTR_UBOUNDS: | |
7537 | case BUILT_IN_CHKP_CHECK_PTR_BOUNDS: | |
7538 | case BUILT_IN_CHKP_SET_PTR_BOUNDS: | |
7539 | case BUILT_IN_CHKP_NARROW_PTR_BOUNDS: | |
7540 | case BUILT_IN_CHKP_STORE_PTR_BOUNDS: | |
7541 | case BUILT_IN_CHKP_GET_PTR_LBOUND: | |
7542 | case BUILT_IN_CHKP_GET_PTR_UBOUND: | |
7543 | /* We allow user CHKP builtins if Pointer Bounds | |
7544 | Checker is off. */ | |
7545 | if (!chkp_function_instrumented_p (current_function_decl)) | |
7546 | { | |
7547 | if (fcode == BUILT_IN_CHKP_SET_PTR_BOUNDS | |
7548 | || fcode == BUILT_IN_CHKP_NARROW_PTR_BOUNDS | |
7549 | || fcode == BUILT_IN_CHKP_INIT_PTR_BOUNDS | |
7550 | || fcode == BUILT_IN_CHKP_NULL_PTR_BOUNDS | |
7551 | || fcode == BUILT_IN_CHKP_COPY_PTR_BOUNDS) | |
7552 | return expand_normal (CALL_EXPR_ARG (exp, 0)); | |
7553 | else if (fcode == BUILT_IN_CHKP_GET_PTR_LBOUND) | |
7554 | return expand_normal (size_zero_node); | |
7555 | else if (fcode == BUILT_IN_CHKP_GET_PTR_UBOUND) | |
7556 | return expand_normal (size_int (-1)); | |
7557 | else | |
7558 | return const0_rtx; | |
7559 | } | |
7560 | /* FALLTHROUGH */ | |
7561 | ||
7562 | case BUILT_IN_CHKP_BNDMK: | |
7563 | case BUILT_IN_CHKP_BNDSTX: | |
7564 | case BUILT_IN_CHKP_BNDCL: | |
7565 | case BUILT_IN_CHKP_BNDCU: | |
7566 | case BUILT_IN_CHKP_BNDLDX: | |
7567 | case BUILT_IN_CHKP_BNDRET: | |
7568 | case BUILT_IN_CHKP_INTERSECT: | |
7569 | case BUILT_IN_CHKP_NARROW: | |
7570 | case BUILT_IN_CHKP_EXTRACT_LOWER: | |
7571 | case BUILT_IN_CHKP_EXTRACT_UPPER: | |
7572 | /* Software implementation of Pointer Bounds Checker is NYI. | |
7573 | Target support is required. */ | |
7574 | error ("Your target platform does not support -fcheck-pointer-bounds"); | |
7575 | break; | |
7576 | ||
ca4c3545 | 7577 | case BUILT_IN_ACC_ON_DEVICE: |
1ae4e7aa | 7578 | /* Do library call, if we failed to expand the builtin when |
7579 | folding. */ | |
ca4c3545 | 7580 | break; |
7581 | ||
92482ee0 | 7582 | default: /* just do library call, if unknown builtin */ |
146c1b4f | 7583 | break; |
53800dbe | 7584 | } |
7585 | ||
7586 | /* The switch statement above can drop through to cause the function | |
7587 | to be called normally. */ | |
7588 | return expand_call (exp, target, ignore); | |
7589 | } | |
650e4c94 | 7590 | |
f21337ef | 7591 | /* Similar to expand_builtin but is used for instrumented calls. */ |
7592 | ||
7593 | rtx | |
7594 | expand_builtin_with_bounds (tree exp, rtx target, | |
7595 | rtx subtarget ATTRIBUTE_UNUSED, | |
7596 | machine_mode mode, int ignore) | |
7597 | { | |
7598 | tree fndecl = get_callee_fndecl (exp); | |
7599 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
7600 | ||
7601 | gcc_assert (CALL_WITH_BOUNDS_P (exp)); | |
7602 | ||
7603 | if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD) | |
7604 | return targetm.expand_builtin (exp, target, subtarget, mode, ignore); | |
7605 | ||
7606 | gcc_assert (fcode > BEGIN_CHKP_BUILTINS | |
7607 | && fcode < END_CHKP_BUILTINS); | |
7608 | ||
7609 | switch (fcode) | |
7610 | { | |
7611 | case BUILT_IN_CHKP_MEMCPY_NOBND_NOCHK_CHKP: | |
7612 | target = expand_builtin_memcpy_with_bounds (exp, target); | |
7613 | if (target) | |
7614 | return target; | |
7615 | break; | |
7616 | ||
7617 | case BUILT_IN_CHKP_MEMPCPY_NOBND_NOCHK_CHKP: | |
d0fbba1a | 7618 | target = expand_builtin_mempcpy_with_bounds (exp, target); |
f21337ef | 7619 | if (target) |
7620 | return target; | |
7621 | break; | |
7622 | ||
7623 | case BUILT_IN_CHKP_MEMSET_NOBND_NOCHK_CHKP: | |
7624 | target = expand_builtin_memset_with_bounds (exp, target, mode); | |
7625 | if (target) | |
7626 | return target; | |
7627 | break; | |
7628 | ||
7629 | default: | |
7630 | break; | |
7631 | } | |
7632 | ||
7633 | /* The switch statement above can drop through to cause the function | |
7634 | to be called normally. */ | |
7635 | return expand_call (exp, target, ignore); | |
7636 | } | |
7637 | ||
805e22b2 | 7638 | /* Determine whether a tree node represents a call to a built-in |
52203a9d | 7639 | function. If the tree T is a call to a built-in function with |
7640 | the right number of arguments of the appropriate types, return | |
7641 | the DECL_FUNCTION_CODE of the call, e.g. BUILT_IN_SQRT. | |
7642 | Otherwise the return value is END_BUILTINS. */ | |
aecda0d6 | 7643 | |
805e22b2 | 7644 | enum built_in_function |
b7bf20db | 7645 | builtin_mathfn_code (const_tree t) |
805e22b2 | 7646 | { |
b7bf20db | 7647 | const_tree fndecl, arg, parmlist; |
7648 | const_tree argtype, parmtype; | |
7649 | const_call_expr_arg_iterator iter; | |
805e22b2 | 7650 | |
7651 | if (TREE_CODE (t) != CALL_EXPR | |
c2f47e15 | 7652 | || TREE_CODE (CALL_EXPR_FN (t)) != ADDR_EXPR) |
805e22b2 | 7653 | return END_BUILTINS; |
7654 | ||
c6e6ecb1 | 7655 | fndecl = get_callee_fndecl (t); |
7656 | if (fndecl == NULL_TREE | |
52203a9d | 7657 | || TREE_CODE (fndecl) != FUNCTION_DECL |
805e22b2 | 7658 | || ! DECL_BUILT_IN (fndecl) |
7659 | || DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD) | |
7660 | return END_BUILTINS; | |
7661 | ||
52203a9d | 7662 | parmlist = TYPE_ARG_TYPES (TREE_TYPE (fndecl)); |
b7bf20db | 7663 | init_const_call_expr_arg_iterator (t, &iter); |
52203a9d | 7664 | for (; parmlist; parmlist = TREE_CHAIN (parmlist)) |
e9f80ff5 | 7665 | { |
52203a9d | 7666 | /* If a function doesn't take a variable number of arguments, |
7667 | the last element in the list will have type `void'. */ | |
7668 | parmtype = TREE_VALUE (parmlist); | |
7669 | if (VOID_TYPE_P (parmtype)) | |
7670 | { | |
b7bf20db | 7671 | if (more_const_call_expr_args_p (&iter)) |
52203a9d | 7672 | return END_BUILTINS; |
7673 | return DECL_FUNCTION_CODE (fndecl); | |
7674 | } | |
7675 | ||
b7bf20db | 7676 | if (! more_const_call_expr_args_p (&iter)) |
e9f80ff5 | 7677 | return END_BUILTINS; |
48e1416a | 7678 | |
b7bf20db | 7679 | arg = next_const_call_expr_arg (&iter); |
c2f47e15 | 7680 | argtype = TREE_TYPE (arg); |
52203a9d | 7681 | |
7682 | if (SCALAR_FLOAT_TYPE_P (parmtype)) | |
7683 | { | |
7684 | if (! SCALAR_FLOAT_TYPE_P (argtype)) | |
7685 | return END_BUILTINS; | |
7686 | } | |
7687 | else if (COMPLEX_FLOAT_TYPE_P (parmtype)) | |
7688 | { | |
7689 | if (! COMPLEX_FLOAT_TYPE_P (argtype)) | |
7690 | return END_BUILTINS; | |
7691 | } | |
7692 | else if (POINTER_TYPE_P (parmtype)) | |
7693 | { | |
7694 | if (! POINTER_TYPE_P (argtype)) | |
7695 | return END_BUILTINS; | |
7696 | } | |
7697 | else if (INTEGRAL_TYPE_P (parmtype)) | |
7698 | { | |
7699 | if (! INTEGRAL_TYPE_P (argtype)) | |
7700 | return END_BUILTINS; | |
7701 | } | |
7702 | else | |
e9f80ff5 | 7703 | return END_BUILTINS; |
e9f80ff5 | 7704 | } |
7705 | ||
52203a9d | 7706 | /* Variable-length argument list. */ |
805e22b2 | 7707 | return DECL_FUNCTION_CODE (fndecl); |
7708 | } | |
7709 | ||
c2f47e15 | 7710 | /* Fold a call to __builtin_constant_p, if we know its argument ARG will |
7711 | evaluate to a constant. */ | |
650e4c94 | 7712 | |
7713 | static tree | |
c2f47e15 | 7714 | fold_builtin_constant_p (tree arg) |
650e4c94 | 7715 | { |
650e4c94 | 7716 | /* We return 1 for a numeric type that's known to be a constant |
7717 | value at compile-time or for an aggregate type that's a | |
7718 | literal constant. */ | |
c2f47e15 | 7719 | STRIP_NOPS (arg); |
650e4c94 | 7720 | |
7721 | /* If we know this is a constant, emit the constant of one. */ | |
c2f47e15 | 7722 | if (CONSTANT_CLASS_P (arg) |
7723 | || (TREE_CODE (arg) == CONSTRUCTOR | |
7724 | && TREE_CONSTANT (arg))) | |
650e4c94 | 7725 | return integer_one_node; |
c2f47e15 | 7726 | if (TREE_CODE (arg) == ADDR_EXPR) |
adcfa3a3 | 7727 | { |
c2f47e15 | 7728 | tree op = TREE_OPERAND (arg, 0); |
adcfa3a3 | 7729 | if (TREE_CODE (op) == STRING_CST |
7730 | || (TREE_CODE (op) == ARRAY_REF | |
7731 | && integer_zerop (TREE_OPERAND (op, 1)) | |
7732 | && TREE_CODE (TREE_OPERAND (op, 0)) == STRING_CST)) | |
7733 | return integer_one_node; | |
7734 | } | |
650e4c94 | 7735 | |
1fb4300c | 7736 | /* If this expression has side effects, show we don't know it to be a |
7737 | constant. Likewise if it's a pointer or aggregate type since in | |
7738 | those case we only want literals, since those are only optimized | |
f97c71a1 | 7739 | when generating RTL, not later. |
7740 | And finally, if we are compiling an initializer, not code, we | |
7741 | need to return a definite result now; there's not going to be any | |
7742 | more optimization done. */ | |
c2f47e15 | 7743 | if (TREE_SIDE_EFFECTS (arg) |
7744 | || AGGREGATE_TYPE_P (TREE_TYPE (arg)) | |
7745 | || POINTER_TYPE_P (TREE_TYPE (arg)) | |
47be647d | 7746 | || cfun == 0 |
0b049e15 | 7747 | || folding_initializer |
7748 | || force_folding_builtin_constant_p) | |
650e4c94 | 7749 | return integer_zero_node; |
7750 | ||
c2f47e15 | 7751 | return NULL_TREE; |
650e4c94 | 7752 | } |
7753 | ||
76f5a783 | 7754 | /* Create builtin_expect with PRED and EXPECTED as its arguments and |
7755 | return it as a truthvalue. */ | |
4ee9c684 | 7756 | |
7757 | static tree | |
c83059be | 7758 | build_builtin_expect_predicate (location_t loc, tree pred, tree expected, |
7759 | tree predictor) | |
4ee9c684 | 7760 | { |
76f5a783 | 7761 | tree fn, arg_types, pred_type, expected_type, call_expr, ret_type; |
4ee9c684 | 7762 | |
b9a16870 | 7763 | fn = builtin_decl_explicit (BUILT_IN_EXPECT); |
76f5a783 | 7764 | arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn)); |
7765 | ret_type = TREE_TYPE (TREE_TYPE (fn)); | |
7766 | pred_type = TREE_VALUE (arg_types); | |
7767 | expected_type = TREE_VALUE (TREE_CHAIN (arg_types)); | |
7768 | ||
389dd41b | 7769 | pred = fold_convert_loc (loc, pred_type, pred); |
7770 | expected = fold_convert_loc (loc, expected_type, expected); | |
c83059be | 7771 | call_expr = build_call_expr_loc (loc, fn, predictor ? 3 : 2, pred, expected, |
7772 | predictor); | |
76f5a783 | 7773 | |
7774 | return build2 (NE_EXPR, TREE_TYPE (pred), call_expr, | |
7775 | build_int_cst (ret_type, 0)); | |
7776 | } | |
7777 | ||
7778 | /* Fold a call to builtin_expect with arguments ARG0 and ARG1. Return | |
7779 | NULL_TREE if no simplification is possible. */ | |
7780 | ||
c83059be | 7781 | tree |
7782 | fold_builtin_expect (location_t loc, tree arg0, tree arg1, tree arg2) | |
76f5a783 | 7783 | { |
083bada9 | 7784 | tree inner, fndecl, inner_arg0; |
76f5a783 | 7785 | enum tree_code code; |
7786 | ||
083bada9 | 7787 | /* Distribute the expected value over short-circuiting operators. |
7788 | See through the cast from truthvalue_type_node to long. */ | |
7789 | inner_arg0 = arg0; | |
d09ef31a | 7790 | while (CONVERT_EXPR_P (inner_arg0) |
083bada9 | 7791 | && INTEGRAL_TYPE_P (TREE_TYPE (inner_arg0)) |
7792 | && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (inner_arg0, 0)))) | |
7793 | inner_arg0 = TREE_OPERAND (inner_arg0, 0); | |
7794 | ||
76f5a783 | 7795 | /* If this is a builtin_expect within a builtin_expect keep the |
7796 | inner one. See through a comparison against a constant. It | |
7797 | might have been added to create a thruthvalue. */ | |
083bada9 | 7798 | inner = inner_arg0; |
7799 | ||
76f5a783 | 7800 | if (COMPARISON_CLASS_P (inner) |
7801 | && TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST) | |
7802 | inner = TREE_OPERAND (inner, 0); | |
7803 | ||
7804 | if (TREE_CODE (inner) == CALL_EXPR | |
7805 | && (fndecl = get_callee_fndecl (inner)) | |
7806 | && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL | |
7807 | && DECL_FUNCTION_CODE (fndecl) == BUILT_IN_EXPECT) | |
7808 | return arg0; | |
7809 | ||
083bada9 | 7810 | inner = inner_arg0; |
76f5a783 | 7811 | code = TREE_CODE (inner); |
7812 | if (code == TRUTH_ANDIF_EXPR || code == TRUTH_ORIF_EXPR) | |
7813 | { | |
7814 | tree op0 = TREE_OPERAND (inner, 0); | |
7815 | tree op1 = TREE_OPERAND (inner, 1); | |
7816 | ||
c83059be | 7817 | op0 = build_builtin_expect_predicate (loc, op0, arg1, arg2); |
7818 | op1 = build_builtin_expect_predicate (loc, op1, arg1, arg2); | |
76f5a783 | 7819 | inner = build2 (code, TREE_TYPE (inner), op0, op1); |
7820 | ||
389dd41b | 7821 | return fold_convert_loc (loc, TREE_TYPE (arg0), inner); |
76f5a783 | 7822 | } |
7823 | ||
7824 | /* If the argument isn't invariant then there's nothing else we can do. */ | |
083bada9 | 7825 | if (!TREE_CONSTANT (inner_arg0)) |
c2f47e15 | 7826 | return NULL_TREE; |
4ee9c684 | 7827 | |
76f5a783 | 7828 | /* If we expect that a comparison against the argument will fold to |
7829 | a constant return the constant. In practice, this means a true | |
7830 | constant or the address of a non-weak symbol. */ | |
083bada9 | 7831 | inner = inner_arg0; |
4ee9c684 | 7832 | STRIP_NOPS (inner); |
7833 | if (TREE_CODE (inner) == ADDR_EXPR) | |
7834 | { | |
7835 | do | |
7836 | { | |
7837 | inner = TREE_OPERAND (inner, 0); | |
7838 | } | |
7839 | while (TREE_CODE (inner) == COMPONENT_REF | |
7840 | || TREE_CODE (inner) == ARRAY_REF); | |
53e9c5c4 | 7841 | if (VAR_OR_FUNCTION_DECL_P (inner) && DECL_WEAK (inner)) |
c2f47e15 | 7842 | return NULL_TREE; |
4ee9c684 | 7843 | } |
7844 | ||
76f5a783 | 7845 | /* Otherwise, ARG0 already has the proper type for the return value. */ |
7846 | return arg0; | |
4ee9c684 | 7847 | } |
7848 | ||
c2f47e15 | 7849 | /* Fold a call to __builtin_classify_type with argument ARG. */ |
27d0c333 | 7850 | |
539a3a92 | 7851 | static tree |
c2f47e15 | 7852 | fold_builtin_classify_type (tree arg) |
539a3a92 | 7853 | { |
c2f47e15 | 7854 | if (arg == 0) |
7002a1c8 | 7855 | return build_int_cst (integer_type_node, no_type_class); |
539a3a92 | 7856 | |
7002a1c8 | 7857 | return build_int_cst (integer_type_node, type_to_class (TREE_TYPE (arg))); |
539a3a92 | 7858 | } |
7859 | ||
c2f47e15 | 7860 | /* Fold a call to __builtin_strlen with argument ARG. */ |
e6e27594 | 7861 | |
7862 | static tree | |
c7cbde74 | 7863 | fold_builtin_strlen (location_t loc, tree type, tree arg) |
e6e27594 | 7864 | { |
c2f47e15 | 7865 | if (!validate_arg (arg, POINTER_TYPE)) |
e6e27594 | 7866 | return NULL_TREE; |
7867 | else | |
7868 | { | |
c2f47e15 | 7869 | tree len = c_strlen (arg, 0); |
e6e27594 | 7870 | |
7871 | if (len) | |
c7cbde74 | 7872 | return fold_convert_loc (loc, type, len); |
e6e27594 | 7873 | |
7874 | return NULL_TREE; | |
7875 | } | |
7876 | } | |
7877 | ||
92c43e3c | 7878 | /* Fold a call to __builtin_inf or __builtin_huge_val. */ |
7879 | ||
7880 | static tree | |
389dd41b | 7881 | fold_builtin_inf (location_t loc, tree type, int warn) |
92c43e3c | 7882 | { |
aa870c1b | 7883 | REAL_VALUE_TYPE real; |
7884 | ||
40f4dbd5 | 7885 | /* __builtin_inff is intended to be usable to define INFINITY on all |
7886 | targets. If an infinity is not available, INFINITY expands "to a | |
7887 | positive constant of type float that overflows at translation | |
7888 | time", footnote "In this case, using INFINITY will violate the | |
7889 | constraint in 6.4.4 and thus require a diagnostic." (C99 7.12#4). | |
7890 | Thus we pedwarn to ensure this constraint violation is | |
7891 | diagnosed. */ | |
92c43e3c | 7892 | if (!MODE_HAS_INFINITIES (TYPE_MODE (type)) && warn) |
389dd41b | 7893 | pedwarn (loc, 0, "target format does not support infinity"); |
92c43e3c | 7894 | |
aa870c1b | 7895 | real_inf (&real); |
7896 | return build_real (type, real); | |
92c43e3c | 7897 | } |
7898 | ||
d735c391 | 7899 | /* Fold function call to builtin sincos, sincosf, or sincosl. Return |
7900 | NULL_TREE if no simplification can be made. */ | |
7901 | ||
7902 | static tree | |
389dd41b | 7903 | fold_builtin_sincos (location_t loc, |
7904 | tree arg0, tree arg1, tree arg2) | |
d735c391 | 7905 | { |
c2f47e15 | 7906 | tree type; |
6c21be92 | 7907 | tree fndecl, call = NULL_TREE; |
d735c391 | 7908 | |
c2f47e15 | 7909 | if (!validate_arg (arg0, REAL_TYPE) |
7910 | || !validate_arg (arg1, POINTER_TYPE) | |
7911 | || !validate_arg (arg2, POINTER_TYPE)) | |
d735c391 | 7912 | return NULL_TREE; |
7913 | ||
d735c391 | 7914 | type = TREE_TYPE (arg0); |
d735c391 | 7915 | |
7916 | /* Calculate the result when the argument is a constant. */ | |
e3240774 | 7917 | built_in_function fn = mathfn_built_in_2 (type, CFN_BUILT_IN_CEXPI); |
6c21be92 | 7918 | if (fn == END_BUILTINS) |
d735c391 | 7919 | return NULL_TREE; |
7920 | ||
6c21be92 | 7921 | /* Canonicalize sincos to cexpi. */ |
7922 | if (TREE_CODE (arg0) == REAL_CST) | |
7923 | { | |
7924 | tree complex_type = build_complex_type (type); | |
744fe358 | 7925 | call = fold_const_call (as_combined_fn (fn), complex_type, arg0); |
6c21be92 | 7926 | } |
7927 | if (!call) | |
7928 | { | |
7929 | if (!targetm.libc_has_function (function_c99_math_complex) | |
7930 | || !builtin_decl_implicit_p (fn)) | |
7931 | return NULL_TREE; | |
7932 | fndecl = builtin_decl_explicit (fn); | |
7933 | call = build_call_expr_loc (loc, fndecl, 1, arg0); | |
7934 | call = builtin_save_expr (call); | |
7935 | } | |
d735c391 | 7936 | |
a75b1c71 | 7937 | return build2 (COMPOUND_EXPR, void_type_node, |
d735c391 | 7938 | build2 (MODIFY_EXPR, void_type_node, |
389dd41b | 7939 | build_fold_indirect_ref_loc (loc, arg1), |
6c21be92 | 7940 | fold_build1_loc (loc, IMAGPART_EXPR, type, call)), |
d735c391 | 7941 | build2 (MODIFY_EXPR, void_type_node, |
389dd41b | 7942 | build_fold_indirect_ref_loc (loc, arg2), |
6c21be92 | 7943 | fold_build1_loc (loc, REALPART_EXPR, type, call))); |
d735c391 | 7944 | } |
7945 | ||
c2f47e15 | 7946 | /* Fold function call to builtin memcmp with arguments ARG1 and ARG2. |
7947 | Return NULL_TREE if no simplification can be made. */ | |
9c8a1629 | 7948 | |
7949 | static tree | |
389dd41b | 7950 | fold_builtin_memcmp (location_t loc, tree arg1, tree arg2, tree len) |
9c8a1629 | 7951 | { |
c2f47e15 | 7952 | if (!validate_arg (arg1, POINTER_TYPE) |
7953 | || !validate_arg (arg2, POINTER_TYPE) | |
7954 | || !validate_arg (len, INTEGER_TYPE)) | |
7955 | return NULL_TREE; | |
9c8a1629 | 7956 | |
7957 | /* If the LEN parameter is zero, return zero. */ | |
7958 | if (integer_zerop (len)) | |
389dd41b | 7959 | return omit_two_operands_loc (loc, integer_type_node, integer_zero_node, |
c4fef134 | 7960 | arg1, arg2); |
9c8a1629 | 7961 | |
7962 | /* If ARG1 and ARG2 are the same (and not volatile), return zero. */ | |
7963 | if (operand_equal_p (arg1, arg2, 0)) | |
389dd41b | 7964 | return omit_one_operand_loc (loc, integer_type_node, integer_zero_node, len); |
c4fef134 | 7965 | |
c4fef134 | 7966 | /* If len parameter is one, return an expression corresponding to |
7967 | (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */ | |
e913b5cd | 7968 | if (tree_fits_uhwi_p (len) && tree_to_uhwi (len) == 1) |
c4fef134 | 7969 | { |
7970 | tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0); | |
4f1b71c0 | 7971 | tree cst_uchar_ptr_node |
7972 | = build_pointer_type_for_mode (cst_uchar_node, ptr_mode, true); | |
7973 | ||
389dd41b | 7974 | tree ind1 |
7975 | = fold_convert_loc (loc, integer_type_node, | |
7976 | build1 (INDIRECT_REF, cst_uchar_node, | |
7977 | fold_convert_loc (loc, | |
7978 | cst_uchar_ptr_node, | |
c4fef134 | 7979 | arg1))); |
389dd41b | 7980 | tree ind2 |
7981 | = fold_convert_loc (loc, integer_type_node, | |
7982 | build1 (INDIRECT_REF, cst_uchar_node, | |
7983 | fold_convert_loc (loc, | |
7984 | cst_uchar_ptr_node, | |
c4fef134 | 7985 | arg2))); |
389dd41b | 7986 | return fold_build2_loc (loc, MINUS_EXPR, integer_type_node, ind1, ind2); |
c4fef134 | 7987 | } |
9c8a1629 | 7988 | |
c2f47e15 | 7989 | return NULL_TREE; |
9c8a1629 | 7990 | } |
7991 | ||
c2f47e15 | 7992 | /* Fold a call to builtin isascii with argument ARG. */ |
d49367d4 | 7993 | |
7994 | static tree | |
389dd41b | 7995 | fold_builtin_isascii (location_t loc, tree arg) |
d49367d4 | 7996 | { |
c2f47e15 | 7997 | if (!validate_arg (arg, INTEGER_TYPE)) |
7998 | return NULL_TREE; | |
d49367d4 | 7999 | else |
8000 | { | |
8001 | /* Transform isascii(c) -> ((c & ~0x7f) == 0). */ | |
c90b5d40 | 8002 | arg = fold_build2 (BIT_AND_EXPR, integer_type_node, arg, |
7002a1c8 | 8003 | build_int_cst (integer_type_node, |
c90b5d40 | 8004 | ~ (unsigned HOST_WIDE_INT) 0x7f)); |
389dd41b | 8005 | return fold_build2_loc (loc, EQ_EXPR, integer_type_node, |
7002a1c8 | 8006 | arg, integer_zero_node); |
d49367d4 | 8007 | } |
8008 | } | |
8009 | ||
c2f47e15 | 8010 | /* Fold a call to builtin toascii with argument ARG. */ |
d49367d4 | 8011 | |
8012 | static tree | |
389dd41b | 8013 | fold_builtin_toascii (location_t loc, tree arg) |
d49367d4 | 8014 | { |
c2f47e15 | 8015 | if (!validate_arg (arg, INTEGER_TYPE)) |
8016 | return NULL_TREE; | |
48e1416a | 8017 | |
c2f47e15 | 8018 | /* Transform toascii(c) -> (c & 0x7f). */ |
389dd41b | 8019 | return fold_build2_loc (loc, BIT_AND_EXPR, integer_type_node, arg, |
7002a1c8 | 8020 | build_int_cst (integer_type_node, 0x7f)); |
d49367d4 | 8021 | } |
8022 | ||
c2f47e15 | 8023 | /* Fold a call to builtin isdigit with argument ARG. */ |
df1cf42e | 8024 | |
8025 | static tree | |
389dd41b | 8026 | fold_builtin_isdigit (location_t loc, tree arg) |
df1cf42e | 8027 | { |
c2f47e15 | 8028 | if (!validate_arg (arg, INTEGER_TYPE)) |
8029 | return NULL_TREE; | |
df1cf42e | 8030 | else |
8031 | { | |
8032 | /* Transform isdigit(c) -> (unsigned)(c) - '0' <= 9. */ | |
624d37a6 | 8033 | /* According to the C standard, isdigit is unaffected by locale. |
8034 | However, it definitely is affected by the target character set. */ | |
624d37a6 | 8035 | unsigned HOST_WIDE_INT target_digit0 |
8036 | = lang_hooks.to_target_charset ('0'); | |
8037 | ||
8038 | if (target_digit0 == 0) | |
8039 | return NULL_TREE; | |
8040 | ||
389dd41b | 8041 | arg = fold_convert_loc (loc, unsigned_type_node, arg); |
c90b5d40 | 8042 | arg = fold_build2 (MINUS_EXPR, unsigned_type_node, arg, |
8043 | build_int_cst (unsigned_type_node, target_digit0)); | |
389dd41b | 8044 | return fold_build2_loc (loc, LE_EXPR, integer_type_node, arg, |
f2532264 | 8045 | build_int_cst (unsigned_type_node, 9)); |
df1cf42e | 8046 | } |
8047 | } | |
27f261ef | 8048 | |
c2f47e15 | 8049 | /* Fold a call to fabs, fabsf or fabsl with argument ARG. */ |
d1aade50 | 8050 | |
8051 | static tree | |
389dd41b | 8052 | fold_builtin_fabs (location_t loc, tree arg, tree type) |
d1aade50 | 8053 | { |
c2f47e15 | 8054 | if (!validate_arg (arg, REAL_TYPE)) |
8055 | return NULL_TREE; | |
d1aade50 | 8056 | |
389dd41b | 8057 | arg = fold_convert_loc (loc, type, arg); |
389dd41b | 8058 | return fold_build1_loc (loc, ABS_EXPR, type, arg); |
d1aade50 | 8059 | } |
8060 | ||
c2f47e15 | 8061 | /* Fold a call to abs, labs, llabs or imaxabs with argument ARG. */ |
d1aade50 | 8062 | |
8063 | static tree | |
389dd41b | 8064 | fold_builtin_abs (location_t loc, tree arg, tree type) |
d1aade50 | 8065 | { |
c2f47e15 | 8066 | if (!validate_arg (arg, INTEGER_TYPE)) |
8067 | return NULL_TREE; | |
d1aade50 | 8068 | |
389dd41b | 8069 | arg = fold_convert_loc (loc, type, arg); |
389dd41b | 8070 | return fold_build1_loc (loc, ABS_EXPR, type, arg); |
d1aade50 | 8071 | } |
8072 | ||
b9be572e | 8073 | /* Fold a call to fma, fmaf, or fmal with arguments ARG[012]. */ |
8074 | ||
8075 | static tree | |
8076 | fold_builtin_fma (location_t loc, tree arg0, tree arg1, tree arg2, tree type) | |
8077 | { | |
866b3d58 | 8078 | /* ??? Only expand to FMA_EXPR if it's directly supported. */ |
b9be572e | 8079 | if (validate_arg (arg0, REAL_TYPE) |
9af5ce0c | 8080 | && validate_arg (arg1, REAL_TYPE) |
866b3d58 | 8081 | && validate_arg (arg2, REAL_TYPE) |
8082 | && optab_handler (fma_optab, TYPE_MODE (type)) != CODE_FOR_nothing) | |
8083 | return fold_build3_loc (loc, FMA_EXPR, type, arg0, arg1, arg2); | |
b9be572e | 8084 | |
b9be572e | 8085 | return NULL_TREE; |
8086 | } | |
8087 | ||
abe4dcf6 | 8088 | /* Fold a call to builtin carg(a+bi) -> atan2(b,a). */ |
8089 | ||
8090 | static tree | |
389dd41b | 8091 | fold_builtin_carg (location_t loc, tree arg, tree type) |
abe4dcf6 | 8092 | { |
239d491a | 8093 | if (validate_arg (arg, COMPLEX_TYPE) |
8094 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg))) == REAL_TYPE) | |
abe4dcf6 | 8095 | { |
8096 | tree atan2_fn = mathfn_built_in (type, BUILT_IN_ATAN2); | |
48e1416a | 8097 | |
abe4dcf6 | 8098 | if (atan2_fn) |
8099 | { | |
c2f47e15 | 8100 | tree new_arg = builtin_save_expr (arg); |
389dd41b | 8101 | tree r_arg = fold_build1_loc (loc, REALPART_EXPR, type, new_arg); |
8102 | tree i_arg = fold_build1_loc (loc, IMAGPART_EXPR, type, new_arg); | |
8103 | return build_call_expr_loc (loc, atan2_fn, 2, i_arg, r_arg); | |
abe4dcf6 | 8104 | } |
8105 | } | |
48e1416a | 8106 | |
abe4dcf6 | 8107 | return NULL_TREE; |
8108 | } | |
8109 | ||
3838b9ae | 8110 | /* Fold a call to builtin frexp, we can assume the base is 2. */ |
8111 | ||
8112 | static tree | |
389dd41b | 8113 | fold_builtin_frexp (location_t loc, tree arg0, tree arg1, tree rettype) |
3838b9ae | 8114 | { |
8115 | if (! validate_arg (arg0, REAL_TYPE) || ! validate_arg (arg1, POINTER_TYPE)) | |
8116 | return NULL_TREE; | |
48e1416a | 8117 | |
3838b9ae | 8118 | STRIP_NOPS (arg0); |
48e1416a | 8119 | |
3838b9ae | 8120 | if (!(TREE_CODE (arg0) == REAL_CST && ! TREE_OVERFLOW (arg0))) |
8121 | return NULL_TREE; | |
48e1416a | 8122 | |
389dd41b | 8123 | arg1 = build_fold_indirect_ref_loc (loc, arg1); |
3838b9ae | 8124 | |
8125 | /* Proceed if a valid pointer type was passed in. */ | |
8126 | if (TYPE_MAIN_VARIANT (TREE_TYPE (arg1)) == integer_type_node) | |
8127 | { | |
8128 | const REAL_VALUE_TYPE *const value = TREE_REAL_CST_PTR (arg0); | |
8129 | tree frac, exp; | |
48e1416a | 8130 | |
3838b9ae | 8131 | switch (value->cl) |
8132 | { | |
8133 | case rvc_zero: | |
8134 | /* For +-0, return (*exp = 0, +-0). */ | |
8135 | exp = integer_zero_node; | |
8136 | frac = arg0; | |
8137 | break; | |
8138 | case rvc_nan: | |
8139 | case rvc_inf: | |
8140 | /* For +-NaN or +-Inf, *exp is unspecified, return arg0. */ | |
389dd41b | 8141 | return omit_one_operand_loc (loc, rettype, arg0, arg1); |
3838b9ae | 8142 | case rvc_normal: |
8143 | { | |
8144 | /* Since the frexp function always expects base 2, and in | |
8145 | GCC normalized significands are already in the range | |
8146 | [0.5, 1.0), we have exactly what frexp wants. */ | |
8147 | REAL_VALUE_TYPE frac_rvt = *value; | |
8148 | SET_REAL_EXP (&frac_rvt, 0); | |
8149 | frac = build_real (rettype, frac_rvt); | |
7002a1c8 | 8150 | exp = build_int_cst (integer_type_node, REAL_EXP (value)); |
3838b9ae | 8151 | } |
8152 | break; | |
8153 | default: | |
8154 | gcc_unreachable (); | |
8155 | } | |
48e1416a | 8156 | |
3838b9ae | 8157 | /* Create the COMPOUND_EXPR (*arg1 = trunc, frac). */ |
389dd41b | 8158 | arg1 = fold_build2_loc (loc, MODIFY_EXPR, rettype, arg1, exp); |
3838b9ae | 8159 | TREE_SIDE_EFFECTS (arg1) = 1; |
389dd41b | 8160 | return fold_build2_loc (loc, COMPOUND_EXPR, rettype, arg1, frac); |
3838b9ae | 8161 | } |
8162 | ||
8163 | return NULL_TREE; | |
8164 | } | |
8165 | ||
ebf8b4f5 | 8166 | /* Fold a call to builtin modf. */ |
8167 | ||
8168 | static tree | |
389dd41b | 8169 | fold_builtin_modf (location_t loc, tree arg0, tree arg1, tree rettype) |
ebf8b4f5 | 8170 | { |
8171 | if (! validate_arg (arg0, REAL_TYPE) || ! validate_arg (arg1, POINTER_TYPE)) | |
8172 | return NULL_TREE; | |
48e1416a | 8173 | |
ebf8b4f5 | 8174 | STRIP_NOPS (arg0); |
48e1416a | 8175 | |
ebf8b4f5 | 8176 | if (!(TREE_CODE (arg0) == REAL_CST && ! TREE_OVERFLOW (arg0))) |
8177 | return NULL_TREE; | |
48e1416a | 8178 | |
389dd41b | 8179 | arg1 = build_fold_indirect_ref_loc (loc, arg1); |
ebf8b4f5 | 8180 | |
8181 | /* Proceed if a valid pointer type was passed in. */ | |
8182 | if (TYPE_MAIN_VARIANT (TREE_TYPE (arg1)) == TYPE_MAIN_VARIANT (rettype)) | |
8183 | { | |
8184 | const REAL_VALUE_TYPE *const value = TREE_REAL_CST_PTR (arg0); | |
8185 | REAL_VALUE_TYPE trunc, frac; | |
8186 | ||
8187 | switch (value->cl) | |
8188 | { | |
8189 | case rvc_nan: | |
8190 | case rvc_zero: | |
8191 | /* For +-NaN or +-0, return (*arg1 = arg0, arg0). */ | |
8192 | trunc = frac = *value; | |
8193 | break; | |
8194 | case rvc_inf: | |
8195 | /* For +-Inf, return (*arg1 = arg0, +-0). */ | |
8196 | frac = dconst0; | |
8197 | frac.sign = value->sign; | |
8198 | trunc = *value; | |
8199 | break; | |
8200 | case rvc_normal: | |
8201 | /* Return (*arg1 = trunc(arg0), arg0-trunc(arg0)). */ | |
8202 | real_trunc (&trunc, VOIDmode, value); | |
8203 | real_arithmetic (&frac, MINUS_EXPR, value, &trunc); | |
8204 | /* If the original number was negative and already | |
8205 | integral, then the fractional part is -0.0. */ | |
8206 | if (value->sign && frac.cl == rvc_zero) | |
8207 | frac.sign = value->sign; | |
8208 | break; | |
8209 | } | |
48e1416a | 8210 | |
ebf8b4f5 | 8211 | /* Create the COMPOUND_EXPR (*arg1 = trunc, frac). */ |
389dd41b | 8212 | arg1 = fold_build2_loc (loc, MODIFY_EXPR, rettype, arg1, |
ebf8b4f5 | 8213 | build_real (rettype, trunc)); |
8214 | TREE_SIDE_EFFECTS (arg1) = 1; | |
389dd41b | 8215 | return fold_build2_loc (loc, COMPOUND_EXPR, rettype, arg1, |
ebf8b4f5 | 8216 | build_real (rettype, frac)); |
8217 | } | |
48e1416a | 8218 | |
ebf8b4f5 | 8219 | return NULL_TREE; |
8220 | } | |
8221 | ||
12f08300 | 8222 | /* Given a location LOC, an interclass builtin function decl FNDECL |
8223 | and its single argument ARG, return an folded expression computing | |
8224 | the same, or NULL_TREE if we either couldn't or didn't want to fold | |
8225 | (the latter happen if there's an RTL instruction available). */ | |
8226 | ||
8227 | static tree | |
8228 | fold_builtin_interclass_mathfn (location_t loc, tree fndecl, tree arg) | |
8229 | { | |
8230 | machine_mode mode; | |
8231 | ||
8232 | if (!validate_arg (arg, REAL_TYPE)) | |
8233 | return NULL_TREE; | |
8234 | ||
8235 | if (interclass_mathfn_icode (arg, fndecl) != CODE_FOR_nothing) | |
8236 | return NULL_TREE; | |
8237 | ||
8238 | mode = TYPE_MODE (TREE_TYPE (arg)); | |
8239 | ||
8240 | bool is_ibm_extended = MODE_COMPOSITE_P (mode); | |
7f38718f | 8241 | |
12f08300 | 8242 | /* If there is no optab, try generic code. */ |
8243 | switch (DECL_FUNCTION_CODE (fndecl)) | |
8244 | { | |
8245 | tree result; | |
a65c4d64 | 8246 | |
12f08300 | 8247 | CASE_FLT_FN (BUILT_IN_ISINF): |
8248 | { | |
8249 | /* isinf(x) -> isgreater(fabs(x),DBL_MAX). */ | |
8250 | tree const isgr_fn = builtin_decl_explicit (BUILT_IN_ISGREATER); | |
8251 | tree type = TREE_TYPE (arg); | |
8252 | REAL_VALUE_TYPE r; | |
8253 | char buf[128]; | |
8254 | ||
8255 | if (is_ibm_extended) | |
8256 | { | |
8257 | /* NaN and Inf are encoded in the high-order double value | |
8258 | only. The low-order value is not significant. */ | |
8259 | type = double_type_node; | |
8260 | mode = DFmode; | |
8261 | arg = fold_build1_loc (loc, NOP_EXPR, type, arg); | |
8262 | } | |
8263 | get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf)); | |
8264 | real_from_string (&r, buf); | |
8265 | result = build_call_expr (isgr_fn, 2, | |
8266 | fold_build1_loc (loc, ABS_EXPR, type, arg), | |
8267 | build_real (type, r)); | |
8268 | return result; | |
8269 | } | |
8270 | CASE_FLT_FN (BUILT_IN_FINITE): | |
8271 | case BUILT_IN_ISFINITE: | |
8272 | { | |
8273 | /* isfinite(x) -> islessequal(fabs(x),DBL_MAX). */ | |
8274 | tree const isle_fn = builtin_decl_explicit (BUILT_IN_ISLESSEQUAL); | |
8275 | tree type = TREE_TYPE (arg); | |
8276 | REAL_VALUE_TYPE r; | |
8277 | char buf[128]; | |
8278 | ||
8279 | if (is_ibm_extended) | |
8280 | { | |
8281 | /* NaN and Inf are encoded in the high-order double value | |
8282 | only. The low-order value is not significant. */ | |
8283 | type = double_type_node; | |
8284 | mode = DFmode; | |
8285 | arg = fold_build1_loc (loc, NOP_EXPR, type, arg); | |
8286 | } | |
8287 | get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf)); | |
8288 | real_from_string (&r, buf); | |
8289 | result = build_call_expr (isle_fn, 2, | |
8290 | fold_build1_loc (loc, ABS_EXPR, type, arg), | |
8291 | build_real (type, r)); | |
8292 | /*result = fold_build2_loc (loc, UNGT_EXPR, | |
8293 | TREE_TYPE (TREE_TYPE (fndecl)), | |
8294 | fold_build1_loc (loc, ABS_EXPR, type, arg), | |
8295 | build_real (type, r)); | |
8296 | result = fold_build1_loc (loc, TRUTH_NOT_EXPR, | |
8297 | TREE_TYPE (TREE_TYPE (fndecl)), | |
8298 | result);*/ | |
8299 | return result; | |
8300 | } | |
8301 | case BUILT_IN_ISNORMAL: | |
8302 | { | |
8303 | /* isnormal(x) -> isgreaterequal(fabs(x),DBL_MIN) & | |
8304 | islessequal(fabs(x),DBL_MAX). */ | |
8305 | tree const isle_fn = builtin_decl_explicit (BUILT_IN_ISLESSEQUAL); | |
8306 | tree type = TREE_TYPE (arg); | |
8307 | tree orig_arg, max_exp, min_exp; | |
8308 | machine_mode orig_mode = mode; | |
8309 | REAL_VALUE_TYPE rmax, rmin; | |
8310 | char buf[128]; | |
8311 | ||
8312 | orig_arg = arg = builtin_save_expr (arg); | |
8313 | if (is_ibm_extended) | |
8314 | { | |
8315 | /* Use double to test the normal range of IBM extended | |
8316 | precision. Emin for IBM extended precision is | |
8317 | different to emin for IEEE double, being 53 higher | |
8318 | since the low double exponent is at least 53 lower | |
8319 | than the high double exponent. */ | |
8320 | type = double_type_node; | |
8321 | mode = DFmode; | |
8322 | arg = fold_build1_loc (loc, NOP_EXPR, type, arg); | |
8323 | } | |
8324 | arg = fold_build1_loc (loc, ABS_EXPR, type, arg); | |
8325 | ||
8326 | get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf)); | |
8327 | real_from_string (&rmax, buf); | |
8328 | sprintf (buf, "0x1p%d", REAL_MODE_FORMAT (orig_mode)->emin - 1); | |
8329 | real_from_string (&rmin, buf); | |
8330 | max_exp = build_real (type, rmax); | |
8331 | min_exp = build_real (type, rmin); | |
8332 | ||
8333 | max_exp = build_call_expr (isle_fn, 2, arg, max_exp); | |
8334 | if (is_ibm_extended) | |
8335 | { | |
8336 | /* Testing the high end of the range is done just using | |
8337 | the high double, using the same test as isfinite(). | |
8338 | For the subnormal end of the range we first test the | |
8339 | high double, then if its magnitude is equal to the | |
8340 | limit of 0x1p-969, we test whether the low double is | |
8341 | non-zero and opposite sign to the high double. */ | |
8342 | tree const islt_fn = builtin_decl_explicit (BUILT_IN_ISLESS); | |
8343 | tree const isgt_fn = builtin_decl_explicit (BUILT_IN_ISGREATER); | |
8344 | tree gt_min = build_call_expr (isgt_fn, 2, arg, min_exp); | |
8345 | tree eq_min = fold_build2 (EQ_EXPR, integer_type_node, | |
8346 | arg, min_exp); | |
8347 | tree as_complex = build1 (VIEW_CONVERT_EXPR, | |
8348 | complex_double_type_node, orig_arg); | |
8349 | tree hi_dbl = build1 (REALPART_EXPR, type, as_complex); | |
8350 | tree lo_dbl = build1 (IMAGPART_EXPR, type, as_complex); | |
8351 | tree zero = build_real (type, dconst0); | |
8352 | tree hilt = build_call_expr (islt_fn, 2, hi_dbl, zero); | |
8353 | tree lolt = build_call_expr (islt_fn, 2, lo_dbl, zero); | |
8354 | tree logt = build_call_expr (isgt_fn, 2, lo_dbl, zero); | |
8355 | tree ok_lo = fold_build1 (TRUTH_NOT_EXPR, integer_type_node, | |
8356 | fold_build3 (COND_EXPR, | |
8357 | integer_type_node, | |
8358 | hilt, logt, lolt)); | |
8359 | eq_min = fold_build2 (TRUTH_ANDIF_EXPR, integer_type_node, | |
8360 | eq_min, ok_lo); | |
8361 | min_exp = fold_build2 (TRUTH_ORIF_EXPR, integer_type_node, | |
8362 | gt_min, eq_min); | |
8363 | } | |
8364 | else | |
8365 | { | |
8366 | tree const isge_fn | |
8367 | = builtin_decl_explicit (BUILT_IN_ISGREATEREQUAL); | |
8368 | min_exp = build_call_expr (isge_fn, 2, arg, min_exp); | |
8369 | } | |
8370 | result = fold_build2 (BIT_AND_EXPR, integer_type_node, | |
8371 | max_exp, min_exp); | |
8372 | return result; | |
8373 | } | |
8374 | default: | |
8375 | break; | |
8376 | } | |
8377 | ||
8378 | return NULL_TREE; | |
8379 | } | |
8380 | ||
8381 | /* Fold a call to __builtin_isnan(), __builtin_isinf, __builtin_finite. | |
c2f47e15 | 8382 | ARG is the argument for the call. */ |
726069ba | 8383 | |
8384 | static tree | |
12f08300 | 8385 | fold_builtin_classify (location_t loc, tree fndecl, tree arg, int builtin_index) |
726069ba | 8386 | { |
12f08300 | 8387 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); |
8388 | ||
c2f47e15 | 8389 | if (!validate_arg (arg, REAL_TYPE)) |
d43cee80 | 8390 | return NULL_TREE; |
726069ba | 8391 | |
726069ba | 8392 | switch (builtin_index) |
8393 | { | |
12f08300 | 8394 | case BUILT_IN_ISINF: |
8395 | if (!HONOR_INFINITIES (arg)) | |
8396 | return omit_one_operand_loc (loc, type, integer_zero_node, arg); | |
8397 | ||
8398 | return NULL_TREE; | |
8399 | ||
c319d56a | 8400 | case BUILT_IN_ISINF_SIGN: |
8401 | { | |
8402 | /* isinf_sign(x) -> isinf(x) ? (signbit(x) ? -1 : 1) : 0 */ | |
8403 | /* In a boolean context, GCC will fold the inner COND_EXPR to | |
8404 | 1. So e.g. "if (isinf_sign(x))" would be folded to just | |
8405 | "if (isinf(x) ? 1 : 0)" which becomes "if (isinf(x))". */ | |
6cfc7001 | 8406 | tree signbit_fn = builtin_decl_explicit (BUILT_IN_SIGNBIT); |
b9a16870 | 8407 | tree isinf_fn = builtin_decl_explicit (BUILT_IN_ISINF); |
c319d56a | 8408 | tree tmp = NULL_TREE; |
8409 | ||
8410 | arg = builtin_save_expr (arg); | |
8411 | ||
8412 | if (signbit_fn && isinf_fn) | |
8413 | { | |
389dd41b | 8414 | tree signbit_call = build_call_expr_loc (loc, signbit_fn, 1, arg); |
8415 | tree isinf_call = build_call_expr_loc (loc, isinf_fn, 1, arg); | |
c319d56a | 8416 | |
389dd41b | 8417 | signbit_call = fold_build2_loc (loc, NE_EXPR, integer_type_node, |
c319d56a | 8418 | signbit_call, integer_zero_node); |
389dd41b | 8419 | isinf_call = fold_build2_loc (loc, NE_EXPR, integer_type_node, |
c319d56a | 8420 | isinf_call, integer_zero_node); |
48e1416a | 8421 | |
389dd41b | 8422 | tmp = fold_build3_loc (loc, COND_EXPR, integer_type_node, signbit_call, |
c319d56a | 8423 | integer_minus_one_node, integer_one_node); |
389dd41b | 8424 | tmp = fold_build3_loc (loc, COND_EXPR, integer_type_node, |
8425 | isinf_call, tmp, | |
c319d56a | 8426 | integer_zero_node); |
8427 | } | |
8428 | ||
8429 | return tmp; | |
8430 | } | |
8431 | ||
12f08300 | 8432 | case BUILT_IN_ISFINITE: |
8433 | if (!HONOR_NANS (arg) | |
8434 | && !HONOR_INFINITIES (arg)) | |
8435 | return omit_one_operand_loc (loc, type, integer_one_node, arg); | |
8436 | ||
8437 | return NULL_TREE; | |
8438 | ||
8439 | case BUILT_IN_ISNAN: | |
8440 | if (!HONOR_NANS (arg)) | |
8441 | return omit_one_operand_loc (loc, type, integer_zero_node, arg); | |
8442 | ||
8443 | { | |
8444 | bool is_ibm_extended = MODE_COMPOSITE_P (TYPE_MODE (TREE_TYPE (arg))); | |
8445 | if (is_ibm_extended) | |
8446 | { | |
8447 | /* NaN and Inf are encoded in the high-order double value | |
8448 | only. The low-order value is not significant. */ | |
8449 | arg = fold_build1_loc (loc, NOP_EXPR, double_type_node, arg); | |
8450 | } | |
8451 | } | |
8452 | arg = builtin_save_expr (arg); | |
8453 | return fold_build2_loc (loc, UNORDERED_EXPR, type, arg, arg); | |
8454 | ||
726069ba | 8455 | default: |
64db345d | 8456 | gcc_unreachable (); |
726069ba | 8457 | } |
8458 | } | |
8459 | ||
12f08300 | 8460 | /* Fold a call to __builtin_fpclassify(int, int, int, int, int, ...). |
8461 | This builtin will generate code to return the appropriate floating | |
8462 | point classification depending on the value of the floating point | |
8463 | number passed in. The possible return values must be supplied as | |
8464 | int arguments to the call in the following order: FP_NAN, FP_INFINITE, | |
8465 | FP_NORMAL, FP_SUBNORMAL and FP_ZERO. The ellipses is for exactly | |
8466 | one floating point argument which is "type generic". */ | |
8467 | ||
8468 | static tree | |
8469 | fold_builtin_fpclassify (location_t loc, tree *args, int nargs) | |
8470 | { | |
8471 | tree fp_nan, fp_infinite, fp_normal, fp_subnormal, fp_zero, | |
8472 | arg, type, res, tmp; | |
8473 | machine_mode mode; | |
8474 | REAL_VALUE_TYPE r; | |
8475 | char buf[128]; | |
8476 | ||
8477 | /* Verify the required arguments in the original call. */ | |
8478 | if (nargs != 6 | |
8479 | || !validate_arg (args[0], INTEGER_TYPE) | |
8480 | || !validate_arg (args[1], INTEGER_TYPE) | |
8481 | || !validate_arg (args[2], INTEGER_TYPE) | |
8482 | || !validate_arg (args[3], INTEGER_TYPE) | |
8483 | || !validate_arg (args[4], INTEGER_TYPE) | |
8484 | || !validate_arg (args[5], REAL_TYPE)) | |
8485 | return NULL_TREE; | |
8486 | ||
8487 | fp_nan = args[0]; | |
8488 | fp_infinite = args[1]; | |
8489 | fp_normal = args[2]; | |
8490 | fp_subnormal = args[3]; | |
8491 | fp_zero = args[4]; | |
8492 | arg = args[5]; | |
8493 | type = TREE_TYPE (arg); | |
8494 | mode = TYPE_MODE (type); | |
8495 | arg = builtin_save_expr (fold_build1_loc (loc, ABS_EXPR, type, arg)); | |
8496 | ||
8497 | /* fpclassify(x) -> | |
8498 | isnan(x) ? FP_NAN : | |
8499 | (fabs(x) == Inf ? FP_INFINITE : | |
8500 | (fabs(x) >= DBL_MIN ? FP_NORMAL : | |
8501 | (x == 0 ? FP_ZERO : FP_SUBNORMAL))). */ | |
8502 | ||
8503 | tmp = fold_build2_loc (loc, EQ_EXPR, integer_type_node, arg, | |
8504 | build_real (type, dconst0)); | |
8505 | res = fold_build3_loc (loc, COND_EXPR, integer_type_node, | |
8506 | tmp, fp_zero, fp_subnormal); | |
8507 | ||
8508 | sprintf (buf, "0x1p%d", REAL_MODE_FORMAT (mode)->emin - 1); | |
8509 | real_from_string (&r, buf); | |
8510 | tmp = fold_build2_loc (loc, GE_EXPR, integer_type_node, | |
8511 | arg, build_real (type, r)); | |
8512 | res = fold_build3_loc (loc, COND_EXPR, integer_type_node, tmp, fp_normal, res); | |
8513 | ||
8514 | if (HONOR_INFINITIES (mode)) | |
8515 | { | |
8516 | real_inf (&r); | |
8517 | tmp = fold_build2_loc (loc, EQ_EXPR, integer_type_node, arg, | |
8518 | build_real (type, r)); | |
8519 | res = fold_build3_loc (loc, COND_EXPR, integer_type_node, tmp, | |
8520 | fp_infinite, res); | |
8521 | } | |
8522 | ||
8523 | if (HONOR_NANS (mode)) | |
8524 | { | |
8525 | tmp = fold_build2_loc (loc, ORDERED_EXPR, integer_type_node, arg, arg); | |
8526 | res = fold_build3_loc (loc, COND_EXPR, integer_type_node, tmp, res, fp_nan); | |
8527 | } | |
8528 | ||
8529 | return res; | |
8530 | } | |
8531 | ||
9bc9f15f | 8532 | /* Fold a call to an unordered comparison function such as |
d5019fe8 | 8533 | __builtin_isgreater(). FNDECL is the FUNCTION_DECL for the function |
c2f47e15 | 8534 | being called and ARG0 and ARG1 are the arguments for the call. |
726069ba | 8535 | UNORDERED_CODE and ORDERED_CODE are comparison codes that give |
8536 | the opposite of the desired result. UNORDERED_CODE is used | |
8537 | for modes that can hold NaNs and ORDERED_CODE is used for | |
8538 | the rest. */ | |
9bc9f15f | 8539 | |
8540 | static tree | |
389dd41b | 8541 | fold_builtin_unordered_cmp (location_t loc, tree fndecl, tree arg0, tree arg1, |
9bc9f15f | 8542 | enum tree_code unordered_code, |
8543 | enum tree_code ordered_code) | |
8544 | { | |
859f903a | 8545 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); |
9bc9f15f | 8546 | enum tree_code code; |
6978db0d | 8547 | tree type0, type1; |
8548 | enum tree_code code0, code1; | |
8549 | tree cmp_type = NULL_TREE; | |
9bc9f15f | 8550 | |
6978db0d | 8551 | type0 = TREE_TYPE (arg0); |
8552 | type1 = TREE_TYPE (arg1); | |
a0c938f0 | 8553 | |
6978db0d | 8554 | code0 = TREE_CODE (type0); |
8555 | code1 = TREE_CODE (type1); | |
a0c938f0 | 8556 | |
6978db0d | 8557 | if (code0 == REAL_TYPE && code1 == REAL_TYPE) |
8558 | /* Choose the wider of two real types. */ | |
8559 | cmp_type = TYPE_PRECISION (type0) >= TYPE_PRECISION (type1) | |
8560 | ? type0 : type1; | |
8561 | else if (code0 == REAL_TYPE && code1 == INTEGER_TYPE) | |
8562 | cmp_type = type0; | |
8563 | else if (code0 == INTEGER_TYPE && code1 == REAL_TYPE) | |
8564 | cmp_type = type1; | |
a0c938f0 | 8565 | |
389dd41b | 8566 | arg0 = fold_convert_loc (loc, cmp_type, arg0); |
8567 | arg1 = fold_convert_loc (loc, cmp_type, arg1); | |
859f903a | 8568 | |
8569 | if (unordered_code == UNORDERED_EXPR) | |
8570 | { | |
93633022 | 8571 | if (!HONOR_NANS (arg0)) |
389dd41b | 8572 | return omit_two_operands_loc (loc, type, integer_zero_node, arg0, arg1); |
8573 | return fold_build2_loc (loc, UNORDERED_EXPR, type, arg0, arg1); | |
859f903a | 8574 | } |
9bc9f15f | 8575 | |
93633022 | 8576 | code = HONOR_NANS (arg0) ? unordered_code : ordered_code; |
389dd41b | 8577 | return fold_build1_loc (loc, TRUTH_NOT_EXPR, type, |
8578 | fold_build2_loc (loc, code, type, arg0, arg1)); | |
9bc9f15f | 8579 | } |
8580 | ||
0c93c8a9 | 8581 | /* Fold __builtin_{,s,u}{add,sub,mul}{,l,ll}_overflow, either into normal |
8582 | arithmetics if it can never overflow, or into internal functions that | |
8583 | return both result of arithmetics and overflowed boolean flag in | |
732905bb | 8584 | a complex integer result, or some other check for overflow. |
8585 | Similarly fold __builtin_{add,sub,mul}_overflow_p to just the overflow | |
8586 | checking part of that. */ | |
0c93c8a9 | 8587 | |
8588 | static tree | |
8589 | fold_builtin_arith_overflow (location_t loc, enum built_in_function fcode, | |
8590 | tree arg0, tree arg1, tree arg2) | |
8591 | { | |
8592 | enum internal_fn ifn = IFN_LAST; | |
732905bb | 8593 | /* The code of the expression corresponding to the type-generic |
8594 | built-in, or ERROR_MARK for the type-specific ones. */ | |
8595 | enum tree_code opcode = ERROR_MARK; | |
8596 | bool ovf_only = false; | |
8597 | ||
0c93c8a9 | 8598 | switch (fcode) |
8599 | { | |
732905bb | 8600 | case BUILT_IN_ADD_OVERFLOW_P: |
8601 | ovf_only = true; | |
8602 | /* FALLTHRU */ | |
0c93c8a9 | 8603 | case BUILT_IN_ADD_OVERFLOW: |
732905bb | 8604 | opcode = PLUS_EXPR; |
8605 | /* FALLTHRU */ | |
0c93c8a9 | 8606 | case BUILT_IN_SADD_OVERFLOW: |
8607 | case BUILT_IN_SADDL_OVERFLOW: | |
8608 | case BUILT_IN_SADDLL_OVERFLOW: | |
8609 | case BUILT_IN_UADD_OVERFLOW: | |
8610 | case BUILT_IN_UADDL_OVERFLOW: | |
8611 | case BUILT_IN_UADDLL_OVERFLOW: | |
8612 | ifn = IFN_ADD_OVERFLOW; | |
8613 | break; | |
732905bb | 8614 | case BUILT_IN_SUB_OVERFLOW_P: |
8615 | ovf_only = true; | |
8616 | /* FALLTHRU */ | |
0c93c8a9 | 8617 | case BUILT_IN_SUB_OVERFLOW: |
732905bb | 8618 | opcode = MINUS_EXPR; |
8619 | /* FALLTHRU */ | |
0c93c8a9 | 8620 | case BUILT_IN_SSUB_OVERFLOW: |
8621 | case BUILT_IN_SSUBL_OVERFLOW: | |
8622 | case BUILT_IN_SSUBLL_OVERFLOW: | |
8623 | case BUILT_IN_USUB_OVERFLOW: | |
8624 | case BUILT_IN_USUBL_OVERFLOW: | |
8625 | case BUILT_IN_USUBLL_OVERFLOW: | |
8626 | ifn = IFN_SUB_OVERFLOW; | |
8627 | break; | |
732905bb | 8628 | case BUILT_IN_MUL_OVERFLOW_P: |
8629 | ovf_only = true; | |
8630 | /* FALLTHRU */ | |
0c93c8a9 | 8631 | case BUILT_IN_MUL_OVERFLOW: |
732905bb | 8632 | opcode = MULT_EXPR; |
8633 | /* FALLTHRU */ | |
0c93c8a9 | 8634 | case BUILT_IN_SMUL_OVERFLOW: |
8635 | case BUILT_IN_SMULL_OVERFLOW: | |
8636 | case BUILT_IN_SMULLL_OVERFLOW: | |
8637 | case BUILT_IN_UMUL_OVERFLOW: | |
8638 | case BUILT_IN_UMULL_OVERFLOW: | |
8639 | case BUILT_IN_UMULLL_OVERFLOW: | |
8640 | ifn = IFN_MUL_OVERFLOW; | |
8641 | break; | |
8642 | default: | |
8643 | gcc_unreachable (); | |
8644 | } | |
732905bb | 8645 | |
8646 | /* For the "generic" overloads, the first two arguments can have different | |
8647 | types and the last argument determines the target type to use to check | |
8648 | for overflow. The arguments of the other overloads all have the same | |
8649 | type. */ | |
8650 | tree type = ovf_only ? TREE_TYPE (arg2) : TREE_TYPE (TREE_TYPE (arg2)); | |
8651 | ||
8652 | /* For the __builtin_{add,sub,mul}_overflow_p builtins, when the first two | |
8653 | arguments are constant, attempt to fold the built-in call into a constant | |
8654 | expression indicating whether or not it detected an overflow. */ | |
8655 | if (ovf_only | |
8656 | && TREE_CODE (arg0) == INTEGER_CST | |
8657 | && TREE_CODE (arg1) == INTEGER_CST) | |
8658 | /* Perform the computation in the target type and check for overflow. */ | |
8659 | return omit_one_operand_loc (loc, boolean_type_node, | |
8660 | arith_overflowed_p (opcode, type, arg0, arg1) | |
8661 | ? boolean_true_node : boolean_false_node, | |
8662 | arg2); | |
8663 | ||
0c93c8a9 | 8664 | tree ctype = build_complex_type (type); |
8665 | tree call = build_call_expr_internal_loc (loc, ifn, ctype, | |
8666 | 2, arg0, arg1); | |
8667 | tree tgt = save_expr (call); | |
8668 | tree intres = build1_loc (loc, REALPART_EXPR, type, tgt); | |
8669 | tree ovfres = build1_loc (loc, IMAGPART_EXPR, type, tgt); | |
8670 | ovfres = fold_convert_loc (loc, boolean_type_node, ovfres); | |
732905bb | 8671 | |
8672 | if (ovf_only) | |
8673 | return omit_one_operand_loc (loc, boolean_type_node, ovfres, arg2); | |
8674 | ||
8675 | tree mem_arg2 = build_fold_indirect_ref_loc (loc, arg2); | |
0c93c8a9 | 8676 | tree store |
8677 | = fold_build2_loc (loc, MODIFY_EXPR, void_type_node, mem_arg2, intres); | |
8678 | return build2_loc (loc, COMPOUND_EXPR, boolean_type_node, store, ovfres); | |
8679 | } | |
8680 | ||
c388a0cf | 8681 | /* Fold a call to __builtin_FILE to a constant string. */ |
8682 | ||
8683 | static inline tree | |
8684 | fold_builtin_FILE (location_t loc) | |
8685 | { | |
8686 | if (const char *fname = LOCATION_FILE (loc)) | |
8687 | return build_string_literal (strlen (fname) + 1, fname); | |
8688 | ||
8689 | return build_string_literal (1, ""); | |
8690 | } | |
8691 | ||
8692 | /* Fold a call to __builtin_FUNCTION to a constant string. */ | |
8693 | ||
8694 | static inline tree | |
8695 | fold_builtin_FUNCTION () | |
8696 | { | |
c2d38635 | 8697 | const char *name = ""; |
8698 | ||
c388a0cf | 8699 | if (current_function_decl) |
c2d38635 | 8700 | name = lang_hooks.decl_printable_name (current_function_decl, 0); |
c388a0cf | 8701 | |
c2d38635 | 8702 | return build_string_literal (strlen (name) + 1, name); |
c388a0cf | 8703 | } |
8704 | ||
8705 | /* Fold a call to __builtin_LINE to an integer constant. */ | |
8706 | ||
8707 | static inline tree | |
8708 | fold_builtin_LINE (location_t loc, tree type) | |
8709 | { | |
8710 | return build_int_cst (type, LOCATION_LINE (loc)); | |
8711 | } | |
8712 | ||
c2f47e15 | 8713 | /* Fold a call to built-in function FNDECL with 0 arguments. |
e80cc485 | 8714 | This function returns NULL_TREE if no simplification was possible. */ |
650e4c94 | 8715 | |
4ee9c684 | 8716 | static tree |
e80cc485 | 8717 | fold_builtin_0 (location_t loc, tree fndecl) |
650e4c94 | 8718 | { |
e9f80ff5 | 8719 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); |
c2f47e15 | 8720 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); |
189b3398 | 8721 | switch (fcode) |
650e4c94 | 8722 | { |
c388a0cf | 8723 | case BUILT_IN_FILE: |
8724 | return fold_builtin_FILE (loc); | |
8725 | ||
8726 | case BUILT_IN_FUNCTION: | |
8727 | return fold_builtin_FUNCTION (); | |
8728 | ||
8729 | case BUILT_IN_LINE: | |
8730 | return fold_builtin_LINE (loc, type); | |
8731 | ||
c2f47e15 | 8732 | CASE_FLT_FN (BUILT_IN_INF): |
012f068a | 8733 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_INF): |
c2f47e15 | 8734 | case BUILT_IN_INFD32: |
8735 | case BUILT_IN_INFD64: | |
8736 | case BUILT_IN_INFD128: | |
389dd41b | 8737 | return fold_builtin_inf (loc, type, true); |
7c2f0500 | 8738 | |
c2f47e15 | 8739 | CASE_FLT_FN (BUILT_IN_HUGE_VAL): |
012f068a | 8740 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_HUGE_VAL): |
389dd41b | 8741 | return fold_builtin_inf (loc, type, false); |
7c2f0500 | 8742 | |
c2f47e15 | 8743 | case BUILT_IN_CLASSIFY_TYPE: |
8744 | return fold_builtin_classify_type (NULL_TREE); | |
7c2f0500 | 8745 | |
c2f47e15 | 8746 | default: |
8747 | break; | |
8748 | } | |
8749 | return NULL_TREE; | |
8750 | } | |
7c2f0500 | 8751 | |
c2f47e15 | 8752 | /* Fold a call to built-in function FNDECL with 1 argument, ARG0. |
e80cc485 | 8753 | This function returns NULL_TREE if no simplification was possible. */ |
7c2f0500 | 8754 | |
c2f47e15 | 8755 | static tree |
e80cc485 | 8756 | fold_builtin_1 (location_t loc, tree fndecl, tree arg0) |
c2f47e15 | 8757 | { |
8758 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); | |
8759 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
6c21be92 | 8760 | |
8761 | if (TREE_CODE (arg0) == ERROR_MARK) | |
8762 | return NULL_TREE; | |
8763 | ||
744fe358 | 8764 | if (tree ret = fold_const_call (as_combined_fn (fcode), type, arg0)) |
6c21be92 | 8765 | return ret; |
8766 | ||
c2f47e15 | 8767 | switch (fcode) |
8768 | { | |
650e4c94 | 8769 | case BUILT_IN_CONSTANT_P: |
7c2f0500 | 8770 | { |
c2f47e15 | 8771 | tree val = fold_builtin_constant_p (arg0); |
7c2f0500 | 8772 | |
7c2f0500 | 8773 | /* Gimplification will pull the CALL_EXPR for the builtin out of |
8774 | an if condition. When not optimizing, we'll not CSE it back. | |
8775 | To avoid link error types of regressions, return false now. */ | |
8776 | if (!val && !optimize) | |
8777 | val = integer_zero_node; | |
8778 | ||
8779 | return val; | |
8780 | } | |
650e4c94 | 8781 | |
539a3a92 | 8782 | case BUILT_IN_CLASSIFY_TYPE: |
c2f47e15 | 8783 | return fold_builtin_classify_type (arg0); |
539a3a92 | 8784 | |
650e4c94 | 8785 | case BUILT_IN_STRLEN: |
c7cbde74 | 8786 | return fold_builtin_strlen (loc, type, arg0); |
650e4c94 | 8787 | |
4f35b1fc | 8788 | CASE_FLT_FN (BUILT_IN_FABS): |
012f068a | 8789 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FABS): |
8aa32773 | 8790 | case BUILT_IN_FABSD32: |
8791 | case BUILT_IN_FABSD64: | |
8792 | case BUILT_IN_FABSD128: | |
389dd41b | 8793 | return fold_builtin_fabs (loc, arg0, type); |
d1aade50 | 8794 | |
8795 | case BUILT_IN_ABS: | |
8796 | case BUILT_IN_LABS: | |
8797 | case BUILT_IN_LLABS: | |
8798 | case BUILT_IN_IMAXABS: | |
389dd41b | 8799 | return fold_builtin_abs (loc, arg0, type); |
c63f4ad3 | 8800 | |
4f35b1fc | 8801 | CASE_FLT_FN (BUILT_IN_CONJ): |
239d491a | 8802 | if (validate_arg (arg0, COMPLEX_TYPE) |
48e1416a | 8803 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg0))) == REAL_TYPE) |
389dd41b | 8804 | return fold_build1_loc (loc, CONJ_EXPR, type, arg0); |
c2f47e15 | 8805 | break; |
36d3581d | 8806 | |
4f35b1fc | 8807 | CASE_FLT_FN (BUILT_IN_CREAL): |
239d491a | 8808 | if (validate_arg (arg0, COMPLEX_TYPE) |
48e1416a | 8809 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg0))) == REAL_TYPE) |
7082509e | 8810 | return non_lvalue_loc (loc, fold_build1_loc (loc, REALPART_EXPR, type, arg0)); |
c2f47e15 | 8811 | break; |
36d3581d | 8812 | |
4f35b1fc | 8813 | CASE_FLT_FN (BUILT_IN_CIMAG): |
b0ce8887 | 8814 | if (validate_arg (arg0, COMPLEX_TYPE) |
8815 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg0))) == REAL_TYPE) | |
389dd41b | 8816 | return non_lvalue_loc (loc, fold_build1_loc (loc, IMAGPART_EXPR, type, arg0)); |
c2f47e15 | 8817 | break; |
36d3581d | 8818 | |
6c21be92 | 8819 | CASE_FLT_FN (BUILT_IN_CARG): |
8820 | return fold_builtin_carg (loc, arg0, type); | |
c2373fdb | 8821 | |
6c21be92 | 8822 | case BUILT_IN_ISASCII: |
8823 | return fold_builtin_isascii (loc, arg0); | |
48e1416a | 8824 | |
6c21be92 | 8825 | case BUILT_IN_TOASCII: |
8826 | return fold_builtin_toascii (loc, arg0); | |
48e1416a | 8827 | |
6c21be92 | 8828 | case BUILT_IN_ISDIGIT: |
8829 | return fold_builtin_isdigit (loc, arg0); | |
48e1416a | 8830 | |
12f08300 | 8831 | CASE_FLT_FN (BUILT_IN_FINITE): |
8832 | case BUILT_IN_FINITED32: | |
8833 | case BUILT_IN_FINITED64: | |
8834 | case BUILT_IN_FINITED128: | |
8835 | case BUILT_IN_ISFINITE: | |
8836 | { | |
8837 | tree ret = fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISFINITE); | |
8838 | if (ret) | |
8839 | return ret; | |
8840 | return fold_builtin_interclass_mathfn (loc, fndecl, arg0); | |
8841 | } | |
8842 | ||
8843 | CASE_FLT_FN (BUILT_IN_ISINF): | |
8844 | case BUILT_IN_ISINFD32: | |
8845 | case BUILT_IN_ISINFD64: | |
8846 | case BUILT_IN_ISINFD128: | |
8847 | { | |
8848 | tree ret = fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISINF); | |
8849 | if (ret) | |
8850 | return ret; | |
8851 | return fold_builtin_interclass_mathfn (loc, fndecl, arg0); | |
8852 | } | |
8853 | ||
8854 | case BUILT_IN_ISNORMAL: | |
8855 | return fold_builtin_interclass_mathfn (loc, fndecl, arg0); | |
8856 | ||
6c21be92 | 8857 | case BUILT_IN_ISINF_SIGN: |
12f08300 | 8858 | return fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISINF_SIGN); |
8859 | ||
8860 | CASE_FLT_FN (BUILT_IN_ISNAN): | |
8861 | case BUILT_IN_ISNAND32: | |
8862 | case BUILT_IN_ISNAND64: | |
8863 | case BUILT_IN_ISNAND128: | |
8864 | return fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISNAN); | |
48e1416a | 8865 | |
6c21be92 | 8866 | case BUILT_IN_FREE: |
8867 | if (integer_zerop (arg0)) | |
8868 | return build_empty_stmt (loc); | |
d064d976 | 8869 | break; |
c63f4ad3 | 8870 | |
6c21be92 | 8871 | default: |
8b4af95f | 8872 | break; |
6c21be92 | 8873 | } |
805e22b2 | 8874 | |
6c21be92 | 8875 | return NULL_TREE; |
3bc5c41b | 8876 | |
6c21be92 | 8877 | } |
728bac60 | 8878 | |
6c21be92 | 8879 | /* Fold a call to built-in function FNDECL with 2 arguments, ARG0 and ARG1. |
8880 | This function returns NULL_TREE if no simplification was possible. */ | |
c2f47e15 | 8881 | |
8882 | static tree | |
e80cc485 | 8883 | fold_builtin_2 (location_t loc, tree fndecl, tree arg0, tree arg1) |
c2f47e15 | 8884 | { |
8885 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); | |
8886 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
8887 | ||
6c21be92 | 8888 | if (TREE_CODE (arg0) == ERROR_MARK |
8889 | || TREE_CODE (arg1) == ERROR_MARK) | |
8890 | return NULL_TREE; | |
e5407ca6 | 8891 | |
744fe358 | 8892 | if (tree ret = fold_const_call (as_combined_fn (fcode), type, arg0, arg1)) |
6c21be92 | 8893 | return ret; |
e84da7c1 | 8894 | |
6c21be92 | 8895 | switch (fcode) |
8896 | { | |
e84da7c1 | 8897 | CASE_FLT_FN_REENT (BUILT_IN_GAMMA): /* GAMMA_R */ |
8898 | CASE_FLT_FN_REENT (BUILT_IN_LGAMMA): /* LGAMMA_R */ | |
8899 | if (validate_arg (arg0, REAL_TYPE) | |
9af5ce0c | 8900 | && validate_arg (arg1, POINTER_TYPE)) |
e84da7c1 | 8901 | return do_mpfr_lgamma_r (arg0, arg1, type); |
8902 | break; | |
c2f47e15 | 8903 | |
3838b9ae | 8904 | CASE_FLT_FN (BUILT_IN_FREXP): |
389dd41b | 8905 | return fold_builtin_frexp (loc, arg0, arg1, type); |
3838b9ae | 8906 | |
ebf8b4f5 | 8907 | CASE_FLT_FN (BUILT_IN_MODF): |
389dd41b | 8908 | return fold_builtin_modf (loc, arg0, arg1, type); |
ebf8b4f5 | 8909 | |
c2f47e15 | 8910 | case BUILT_IN_STRSPN: |
389dd41b | 8911 | return fold_builtin_strspn (loc, arg0, arg1); |
c2f47e15 | 8912 | |
8913 | case BUILT_IN_STRCSPN: | |
389dd41b | 8914 | return fold_builtin_strcspn (loc, arg0, arg1); |
c2f47e15 | 8915 | |
c2f47e15 | 8916 | case BUILT_IN_STRPBRK: |
389dd41b | 8917 | return fold_builtin_strpbrk (loc, arg0, arg1, type); |
c2f47e15 | 8918 | |
8919 | case BUILT_IN_EXPECT: | |
c83059be | 8920 | return fold_builtin_expect (loc, arg0, arg1, NULL_TREE); |
c2f47e15 | 8921 | |
9bc9f15f | 8922 | case BUILT_IN_ISGREATER: |
389dd41b | 8923 | return fold_builtin_unordered_cmp (loc, fndecl, |
8924 | arg0, arg1, UNLE_EXPR, LE_EXPR); | |
9bc9f15f | 8925 | case BUILT_IN_ISGREATEREQUAL: |
389dd41b | 8926 | return fold_builtin_unordered_cmp (loc, fndecl, |
8927 | arg0, arg1, UNLT_EXPR, LT_EXPR); | |
9bc9f15f | 8928 | case BUILT_IN_ISLESS: |
389dd41b | 8929 | return fold_builtin_unordered_cmp (loc, fndecl, |
8930 | arg0, arg1, UNGE_EXPR, GE_EXPR); | |
9bc9f15f | 8931 | case BUILT_IN_ISLESSEQUAL: |
389dd41b | 8932 | return fold_builtin_unordered_cmp (loc, fndecl, |
8933 | arg0, arg1, UNGT_EXPR, GT_EXPR); | |
9bc9f15f | 8934 | case BUILT_IN_ISLESSGREATER: |
389dd41b | 8935 | return fold_builtin_unordered_cmp (loc, fndecl, |
8936 | arg0, arg1, UNEQ_EXPR, EQ_EXPR); | |
9bc9f15f | 8937 | case BUILT_IN_ISUNORDERED: |
389dd41b | 8938 | return fold_builtin_unordered_cmp (loc, fndecl, |
8939 | arg0, arg1, UNORDERED_EXPR, | |
d5019fe8 | 8940 | NOP_EXPR); |
9bc9f15f | 8941 | |
7c2f0500 | 8942 | /* We do the folding for va_start in the expander. */ |
8943 | case BUILT_IN_VA_START: | |
8944 | break; | |
f0613857 | 8945 | |
0a39fd54 | 8946 | case BUILT_IN_OBJECT_SIZE: |
c2f47e15 | 8947 | return fold_builtin_object_size (arg0, arg1); |
0a39fd54 | 8948 | |
1cd6e20d | 8949 | case BUILT_IN_ATOMIC_ALWAYS_LOCK_FREE: |
8950 | return fold_builtin_atomic_always_lock_free (arg0, arg1); | |
8951 | ||
8952 | case BUILT_IN_ATOMIC_IS_LOCK_FREE: | |
8953 | return fold_builtin_atomic_is_lock_free (arg0, arg1); | |
8954 | ||
c2f47e15 | 8955 | default: |
8956 | break; | |
8957 | } | |
8958 | return NULL_TREE; | |
8959 | } | |
8960 | ||
8961 | /* Fold a call to built-in function FNDECL with 3 arguments, ARG0, ARG1, | |
e80cc485 | 8962 | and ARG2. |
c2f47e15 | 8963 | This function returns NULL_TREE if no simplification was possible. */ |
8964 | ||
8965 | static tree | |
389dd41b | 8966 | fold_builtin_3 (location_t loc, tree fndecl, |
e80cc485 | 8967 | tree arg0, tree arg1, tree arg2) |
c2f47e15 | 8968 | { |
8969 | tree type = TREE_TYPE (TREE_TYPE (fndecl)); | |
8970 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
6c21be92 | 8971 | |
8972 | if (TREE_CODE (arg0) == ERROR_MARK | |
8973 | || TREE_CODE (arg1) == ERROR_MARK | |
8974 | || TREE_CODE (arg2) == ERROR_MARK) | |
8975 | return NULL_TREE; | |
8976 | ||
744fe358 | 8977 | if (tree ret = fold_const_call (as_combined_fn (fcode), type, |
8978 | arg0, arg1, arg2)) | |
6c21be92 | 8979 | return ret; |
8980 | ||
c2f47e15 | 8981 | switch (fcode) |
8982 | { | |
8983 | ||
8984 | CASE_FLT_FN (BUILT_IN_SINCOS): | |
389dd41b | 8985 | return fold_builtin_sincos (loc, arg0, arg1, arg2); |
c2f47e15 | 8986 | |
8987 | CASE_FLT_FN (BUILT_IN_FMA): | |
b9be572e | 8988 | return fold_builtin_fma (loc, arg0, arg1, arg2, type); |
c2f47e15 | 8989 | |
e5407ca6 | 8990 | CASE_FLT_FN (BUILT_IN_REMQUO): |
8991 | if (validate_arg (arg0, REAL_TYPE) | |
9af5ce0c | 8992 | && validate_arg (arg1, REAL_TYPE) |
8993 | && validate_arg (arg2, POINTER_TYPE)) | |
e5407ca6 | 8994 | return do_mpfr_remquo (arg0, arg1, arg2); |
8995 | break; | |
e5407ca6 | 8996 | |
c2f47e15 | 8997 | case BUILT_IN_MEMCMP: |
389dd41b | 8998 | return fold_builtin_memcmp (loc, arg0, arg1, arg2);; |
c2f47e15 | 8999 | |
c83059be | 9000 | case BUILT_IN_EXPECT: |
9001 | return fold_builtin_expect (loc, arg0, arg1, arg2); | |
9002 | ||
0c93c8a9 | 9003 | case BUILT_IN_ADD_OVERFLOW: |
9004 | case BUILT_IN_SUB_OVERFLOW: | |
9005 | case BUILT_IN_MUL_OVERFLOW: | |
732905bb | 9006 | case BUILT_IN_ADD_OVERFLOW_P: |
9007 | case BUILT_IN_SUB_OVERFLOW_P: | |
9008 | case BUILT_IN_MUL_OVERFLOW_P: | |
0c93c8a9 | 9009 | case BUILT_IN_SADD_OVERFLOW: |
9010 | case BUILT_IN_SADDL_OVERFLOW: | |
9011 | case BUILT_IN_SADDLL_OVERFLOW: | |
9012 | case BUILT_IN_SSUB_OVERFLOW: | |
9013 | case BUILT_IN_SSUBL_OVERFLOW: | |
9014 | case BUILT_IN_SSUBLL_OVERFLOW: | |
9015 | case BUILT_IN_SMUL_OVERFLOW: | |
9016 | case BUILT_IN_SMULL_OVERFLOW: | |
9017 | case BUILT_IN_SMULLL_OVERFLOW: | |
9018 | case BUILT_IN_UADD_OVERFLOW: | |
9019 | case BUILT_IN_UADDL_OVERFLOW: | |
9020 | case BUILT_IN_UADDLL_OVERFLOW: | |
9021 | case BUILT_IN_USUB_OVERFLOW: | |
9022 | case BUILT_IN_USUBL_OVERFLOW: | |
9023 | case BUILT_IN_USUBLL_OVERFLOW: | |
9024 | case BUILT_IN_UMUL_OVERFLOW: | |
9025 | case BUILT_IN_UMULL_OVERFLOW: | |
9026 | case BUILT_IN_UMULLL_OVERFLOW: | |
9027 | return fold_builtin_arith_overflow (loc, fcode, arg0, arg1, arg2); | |
9028 | ||
650e4c94 | 9029 | default: |
9030 | break; | |
9031 | } | |
c2f47e15 | 9032 | return NULL_TREE; |
9033 | } | |
650e4c94 | 9034 | |
c2f47e15 | 9035 | /* Fold a call to built-in function FNDECL. ARGS is an array of NARGS |
9d884767 | 9036 | arguments. IGNORE is true if the result of the |
9037 | function call is ignored. This function returns NULL_TREE if no | |
9038 | simplification was possible. */ | |
48e1416a | 9039 | |
2165588a | 9040 | tree |
e80cc485 | 9041 | fold_builtin_n (location_t loc, tree fndecl, tree *args, int nargs, bool) |
c2f47e15 | 9042 | { |
9043 | tree ret = NULL_TREE; | |
a7f5bb2d | 9044 | |
c2f47e15 | 9045 | switch (nargs) |
9046 | { | |
9047 | case 0: | |
e80cc485 | 9048 | ret = fold_builtin_0 (loc, fndecl); |
c2f47e15 | 9049 | break; |
9050 | case 1: | |
e80cc485 | 9051 | ret = fold_builtin_1 (loc, fndecl, args[0]); |
c2f47e15 | 9052 | break; |
9053 | case 2: | |
e80cc485 | 9054 | ret = fold_builtin_2 (loc, fndecl, args[0], args[1]); |
c2f47e15 | 9055 | break; |
9056 | case 3: | |
e80cc485 | 9057 | ret = fold_builtin_3 (loc, fndecl, args[0], args[1], args[2]); |
c2f47e15 | 9058 | break; |
c2f47e15 | 9059 | default: |
12f08300 | 9060 | ret = fold_builtin_varargs (loc, fndecl, args, nargs); |
c2f47e15 | 9061 | break; |
9062 | } | |
9063 | if (ret) | |
9064 | { | |
75a70cf9 | 9065 | ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret); |
389dd41b | 9066 | SET_EXPR_LOCATION (ret, loc); |
c2f47e15 | 9067 | TREE_NO_WARNING (ret) = 1; |
9068 | return ret; | |
9069 | } | |
9070 | return NULL_TREE; | |
9071 | } | |
9072 | ||
0e80b01d | 9073 | /* Construct a new CALL_EXPR to FNDECL using the tail of the argument |
9074 | list ARGS along with N new arguments in NEWARGS. SKIP is the number | |
9075 | of arguments in ARGS to be omitted. OLDNARGS is the number of | |
9076 | elements in ARGS. */ | |
c2f47e15 | 9077 | |
9078 | static tree | |
0e80b01d | 9079 | rewrite_call_expr_valist (location_t loc, int oldnargs, tree *args, |
9080 | int skip, tree fndecl, int n, va_list newargs) | |
c2f47e15 | 9081 | { |
0e80b01d | 9082 | int nargs = oldnargs - skip + n; |
9083 | tree *buffer; | |
c2f47e15 | 9084 | |
0e80b01d | 9085 | if (n > 0) |
c2f47e15 | 9086 | { |
0e80b01d | 9087 | int i, j; |
c2f47e15 | 9088 | |
0e80b01d | 9089 | buffer = XALLOCAVEC (tree, nargs); |
9090 | for (i = 0; i < n; i++) | |
9091 | buffer[i] = va_arg (newargs, tree); | |
9092 | for (j = skip; j < oldnargs; j++, i++) | |
9093 | buffer[i] = args[j]; | |
9094 | } | |
9095 | else | |
9096 | buffer = args + skip; | |
19fbe3a4 | 9097 | |
0e80b01d | 9098 | return build_call_expr_loc_array (loc, fndecl, nargs, buffer); |
9099 | } | |
c2f47e15 | 9100 | |
198622c0 | 9101 | /* Return true if FNDECL shouldn't be folded right now. |
9102 | If a built-in function has an inline attribute always_inline | |
9103 | wrapper, defer folding it after always_inline functions have | |
9104 | been inlined, otherwise e.g. -D_FORTIFY_SOURCE checking | |
9105 | might not be performed. */ | |
9106 | ||
51d2c51e | 9107 | bool |
198622c0 | 9108 | avoid_folding_inline_builtin (tree fndecl) |
9109 | { | |
9110 | return (DECL_DECLARED_INLINE_P (fndecl) | |
9111 | && DECL_DISREGARD_INLINE_LIMITS (fndecl) | |
9112 | && cfun | |
9113 | && !cfun->always_inline_functions_inlined | |
9114 | && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fndecl))); | |
9115 | } | |
9116 | ||
4ee9c684 | 9117 | /* A wrapper function for builtin folding that prevents warnings for |
491e04ef | 9118 | "statement without effect" and the like, caused by removing the |
4ee9c684 | 9119 | call node earlier than the warning is generated. */ |
9120 | ||
9121 | tree | |
389dd41b | 9122 | fold_call_expr (location_t loc, tree exp, bool ignore) |
4ee9c684 | 9123 | { |
c2f47e15 | 9124 | tree ret = NULL_TREE; |
9125 | tree fndecl = get_callee_fndecl (exp); | |
9126 | if (fndecl | |
9127 | && TREE_CODE (fndecl) == FUNCTION_DECL | |
48dc2227 | 9128 | && DECL_BUILT_IN (fndecl) |
9129 | /* If CALL_EXPR_VA_ARG_PACK is set, the arguments aren't finalized | |
9130 | yet. Defer folding until we see all the arguments | |
9131 | (after inlining). */ | |
9132 | && !CALL_EXPR_VA_ARG_PACK (exp)) | |
9133 | { | |
9134 | int nargs = call_expr_nargs (exp); | |
9135 | ||
9136 | /* Before gimplification CALL_EXPR_VA_ARG_PACK is not set, but | |
9137 | instead last argument is __builtin_va_arg_pack (). Defer folding | |
9138 | even in that case, until arguments are finalized. */ | |
9139 | if (nargs && TREE_CODE (CALL_EXPR_ARG (exp, nargs - 1)) == CALL_EXPR) | |
9140 | { | |
9141 | tree fndecl2 = get_callee_fndecl (CALL_EXPR_ARG (exp, nargs - 1)); | |
9142 | if (fndecl2 | |
9143 | && TREE_CODE (fndecl2) == FUNCTION_DECL | |
9144 | && DECL_BUILT_IN_CLASS (fndecl2) == BUILT_IN_NORMAL | |
9145 | && DECL_FUNCTION_CODE (fndecl2) == BUILT_IN_VA_ARG_PACK) | |
9146 | return NULL_TREE; | |
9147 | } | |
9148 | ||
198622c0 | 9149 | if (avoid_folding_inline_builtin (fndecl)) |
9150 | return NULL_TREE; | |
9151 | ||
c2f47e15 | 9152 | if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD) |
97d67146 | 9153 | return targetm.fold_builtin (fndecl, call_expr_nargs (exp), |
9154 | CALL_EXPR_ARGP (exp), ignore); | |
c2f47e15 | 9155 | else |
9156 | { | |
9d884767 | 9157 | tree *args = CALL_EXPR_ARGP (exp); |
9158 | ret = fold_builtin_n (loc, fndecl, args, nargs, ignore); | |
c2f47e15 | 9159 | if (ret) |
389dd41b | 9160 | return ret; |
c2f47e15 | 9161 | } |
4ee9c684 | 9162 | } |
c2f47e15 | 9163 | return NULL_TREE; |
9164 | } | |
48e1416a | 9165 | |
9d884767 | 9166 | /* Fold a CALL_EXPR with type TYPE with FN as the function expression. |
9167 | N arguments are passed in the array ARGARRAY. Return a folded | |
9168 | expression or NULL_TREE if no simplification was possible. */ | |
805e22b2 | 9169 | |
9170 | tree | |
9d884767 | 9171 | fold_builtin_call_array (location_t loc, tree, |
d01f58f9 | 9172 | tree fn, |
9173 | int n, | |
9174 | tree *argarray) | |
7e15618b | 9175 | { |
9d884767 | 9176 | if (TREE_CODE (fn) != ADDR_EXPR) |
9177 | return NULL_TREE; | |
c2f47e15 | 9178 | |
9d884767 | 9179 | tree fndecl = TREE_OPERAND (fn, 0); |
9180 | if (TREE_CODE (fndecl) == FUNCTION_DECL | |
9181 | && DECL_BUILT_IN (fndecl)) | |
9182 | { | |
9183 | /* If last argument is __builtin_va_arg_pack (), arguments to this | |
9184 | function are not finalized yet. Defer folding until they are. */ | |
9185 | if (n && TREE_CODE (argarray[n - 1]) == CALL_EXPR) | |
9186 | { | |
9187 | tree fndecl2 = get_callee_fndecl (argarray[n - 1]); | |
9188 | if (fndecl2 | |
9189 | && TREE_CODE (fndecl2) == FUNCTION_DECL | |
9190 | && DECL_BUILT_IN_CLASS (fndecl2) == BUILT_IN_NORMAL | |
9191 | && DECL_FUNCTION_CODE (fndecl2) == BUILT_IN_VA_ARG_PACK) | |
9192 | return NULL_TREE; | |
9193 | } | |
9194 | if (avoid_folding_inline_builtin (fndecl)) | |
9195 | return NULL_TREE; | |
9196 | if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD) | |
9197 | return targetm.fold_builtin (fndecl, n, argarray, false); | |
9198 | else | |
9199 | return fold_builtin_n (loc, fndecl, argarray, n, false); | |
9200 | } | |
c2f47e15 | 9201 | |
9d884767 | 9202 | return NULL_TREE; |
c2f47e15 | 9203 | } |
9204 | ||
af1409ad | 9205 | /* Construct a new CALL_EXPR using the tail of the argument list of EXP |
9206 | along with N new arguments specified as the "..." parameters. SKIP | |
9207 | is the number of arguments in EXP to be omitted. This function is used | |
9208 | to do varargs-to-varargs transformations. */ | |
9209 | ||
9210 | static tree | |
9211 | rewrite_call_expr (location_t loc, tree exp, int skip, tree fndecl, int n, ...) | |
9212 | { | |
9213 | va_list ap; | |
9214 | tree t; | |
9215 | ||
9216 | va_start (ap, n); | |
9217 | t = rewrite_call_expr_valist (loc, call_expr_nargs (exp), | |
9218 | CALL_EXPR_ARGP (exp), skip, fndecl, n, ap); | |
9219 | va_end (ap); | |
c2f47e15 | 9220 | |
af1409ad | 9221 | return t; |
c2f47e15 | 9222 | } |
9223 | ||
9224 | /* Validate a single argument ARG against a tree code CODE representing | |
184fac50 | 9225 | a type. Return true when argument is valid. */ |
48e1416a | 9226 | |
c2f47e15 | 9227 | static bool |
184fac50 | 9228 | validate_arg (const_tree arg, enum tree_code code) |
c2f47e15 | 9229 | { |
9230 | if (!arg) | |
9231 | return false; | |
9232 | else if (code == POINTER_TYPE) | |
184fac50 | 9233 | return POINTER_TYPE_P (TREE_TYPE (arg)); |
c7f617c2 | 9234 | else if (code == INTEGER_TYPE) |
9235 | return INTEGRAL_TYPE_P (TREE_TYPE (arg)); | |
c2f47e15 | 9236 | return code == TREE_CODE (TREE_TYPE (arg)); |
7e15618b | 9237 | } |
0eb671f7 | 9238 | |
75a70cf9 | 9239 | /* This function validates the types of a function call argument list |
9240 | against a specified list of tree_codes. If the last specifier is a 0, | |
9241 | that represents an ellipses, otherwise the last specifier must be a | |
9242 | VOID_TYPE. | |
9243 | ||
9244 | This is the GIMPLE version of validate_arglist. Eventually we want to | |
9245 | completely convert builtins.c to work from GIMPLEs and the tree based | |
9246 | validate_arglist will then be removed. */ | |
9247 | ||
9248 | bool | |
1a91d914 | 9249 | validate_gimple_arglist (const gcall *call, ...) |
75a70cf9 | 9250 | { |
9251 | enum tree_code code; | |
9252 | bool res = 0; | |
9253 | va_list ap; | |
9254 | const_tree arg; | |
9255 | size_t i; | |
9256 | ||
9257 | va_start (ap, call); | |
9258 | i = 0; | |
9259 | ||
9260 | do | |
9261 | { | |
d62e827b | 9262 | code = (enum tree_code) va_arg (ap, int); |
75a70cf9 | 9263 | switch (code) |
9264 | { | |
9265 | case 0: | |
9266 | /* This signifies an ellipses, any further arguments are all ok. */ | |
9267 | res = true; | |
9268 | goto end; | |
9269 | case VOID_TYPE: | |
9270 | /* This signifies an endlink, if no arguments remain, return | |
9271 | true, otherwise return false. */ | |
9272 | res = (i == gimple_call_num_args (call)); | |
9273 | goto end; | |
9274 | default: | |
9275 | /* If no parameters remain or the parameter's code does not | |
9276 | match the specified code, return false. Otherwise continue | |
9277 | checking any remaining arguments. */ | |
9278 | arg = gimple_call_arg (call, i++); | |
9279 | if (!validate_arg (arg, code)) | |
9280 | goto end; | |
9281 | break; | |
9282 | } | |
9283 | } | |
9284 | while (1); | |
9285 | ||
9286 | /* We need gotos here since we can only have one VA_CLOSE in a | |
9287 | function. */ | |
9288 | end: ; | |
9289 | va_end (ap); | |
9290 | ||
9291 | return res; | |
9292 | } | |
9293 | ||
fc2a2dcb | 9294 | /* Default target-specific builtin expander that does nothing. */ |
9295 | ||
9296 | rtx | |
aecda0d6 | 9297 | default_expand_builtin (tree exp ATTRIBUTE_UNUSED, |
9298 | rtx target ATTRIBUTE_UNUSED, | |
9299 | rtx subtarget ATTRIBUTE_UNUSED, | |
3754d046 | 9300 | machine_mode mode ATTRIBUTE_UNUSED, |
aecda0d6 | 9301 | int ignore ATTRIBUTE_UNUSED) |
fc2a2dcb | 9302 | { |
9303 | return NULL_RTX; | |
9304 | } | |
c7926a82 | 9305 | |
01537105 | 9306 | /* Returns true is EXP represents data that would potentially reside |
9307 | in a readonly section. */ | |
9308 | ||
b9ea678c | 9309 | bool |
01537105 | 9310 | readonly_data_expr (tree exp) |
9311 | { | |
9312 | STRIP_NOPS (exp); | |
9313 | ||
9ff0637e | 9314 | if (TREE_CODE (exp) != ADDR_EXPR) |
9315 | return false; | |
9316 | ||
9317 | exp = get_base_address (TREE_OPERAND (exp, 0)); | |
9318 | if (!exp) | |
9319 | return false; | |
9320 | ||
9321 | /* Make sure we call decl_readonly_section only for trees it | |
9322 | can handle (since it returns true for everything it doesn't | |
9323 | understand). */ | |
491e04ef | 9324 | if (TREE_CODE (exp) == STRING_CST |
9ff0637e | 9325 | || TREE_CODE (exp) == CONSTRUCTOR |
53e9c5c4 | 9326 | || (VAR_P (exp) && TREE_STATIC (exp))) |
9ff0637e | 9327 | return decl_readonly_section (exp, 0); |
01537105 | 9328 | else |
9329 | return false; | |
9330 | } | |
4ee9c684 | 9331 | |
c2f47e15 | 9332 | /* Simplify a call to the strpbrk builtin. S1 and S2 are the arguments |
9333 | to the call, and TYPE is its return type. | |
4ee9c684 | 9334 | |
c2f47e15 | 9335 | Return NULL_TREE if no simplification was possible, otherwise return the |
4ee9c684 | 9336 | simplified form of the call as a tree. |
9337 | ||
9338 | The simplified form may be a constant or other expression which | |
9339 | computes the same value, but in a more efficient manner (including | |
9340 | calls to other builtin functions). | |
9341 | ||
9342 | The call may contain arguments which need to be evaluated, but | |
9343 | which are not useful to determine the result of the call. In | |
9344 | this case we return a chain of COMPOUND_EXPRs. The LHS of each | |
9345 | COMPOUND_EXPR will be an argument which must be evaluated. | |
9346 | COMPOUND_EXPRs are chained through their RHS. The RHS of the last | |
9347 | COMPOUND_EXPR in the chain will contain the tree for the simplified | |
9348 | form of the builtin function call. */ | |
9349 | ||
9350 | static tree | |
389dd41b | 9351 | fold_builtin_strpbrk (location_t loc, tree s1, tree s2, tree type) |
4ee9c684 | 9352 | { |
c2f47e15 | 9353 | if (!validate_arg (s1, POINTER_TYPE) |
9354 | || !validate_arg (s2, POINTER_TYPE)) | |
9355 | return NULL_TREE; | |
4ee9c684 | 9356 | else |
9357 | { | |
4ee9c684 | 9358 | tree fn; |
9359 | const char *p1, *p2; | |
9360 | ||
9361 | p2 = c_getstr (s2); | |
9362 | if (p2 == NULL) | |
c2f47e15 | 9363 | return NULL_TREE; |
4ee9c684 | 9364 | |
9365 | p1 = c_getstr (s1); | |
9366 | if (p1 != NULL) | |
9367 | { | |
9368 | const char *r = strpbrk (p1, p2); | |
daa1d5f5 | 9369 | tree tem; |
4ee9c684 | 9370 | |
9371 | if (r == NULL) | |
779b4c41 | 9372 | return build_int_cst (TREE_TYPE (s1), 0); |
4ee9c684 | 9373 | |
9374 | /* Return an offset into the constant string argument. */ | |
2cc66f2a | 9375 | tem = fold_build_pointer_plus_hwi_loc (loc, s1, r - p1); |
389dd41b | 9376 | return fold_convert_loc (loc, type, tem); |
4ee9c684 | 9377 | } |
9378 | ||
9379 | if (p2[0] == '\0') | |
05abc81b | 9380 | /* strpbrk(x, "") == NULL. |
9381 | Evaluate and ignore s1 in case it had side-effects. */ | |
389dd41b | 9382 | return omit_one_operand_loc (loc, TREE_TYPE (s1), integer_zero_node, s1); |
4ee9c684 | 9383 | |
9384 | if (p2[1] != '\0') | |
c2f47e15 | 9385 | return NULL_TREE; /* Really call strpbrk. */ |
4ee9c684 | 9386 | |
b9a16870 | 9387 | fn = builtin_decl_implicit (BUILT_IN_STRCHR); |
4ee9c684 | 9388 | if (!fn) |
c2f47e15 | 9389 | return NULL_TREE; |
4ee9c684 | 9390 | |
9391 | /* New argument list transforming strpbrk(s1, s2) to | |
9392 | strchr(s1, s2[0]). */ | |
7002a1c8 | 9393 | return build_call_expr_loc (loc, fn, 2, s1, |
9394 | build_int_cst (integer_type_node, p2[0])); | |
4ee9c684 | 9395 | } |
9396 | } | |
9397 | ||
c2f47e15 | 9398 | /* Simplify a call to the strspn builtin. S1 and S2 are the arguments |
9399 | to the call. | |
4ee9c684 | 9400 | |
c2f47e15 | 9401 | Return NULL_TREE if no simplification was possible, otherwise return the |
4ee9c684 | 9402 | simplified form of the call as a tree. |
9403 | ||
9404 | The simplified form may be a constant or other expression which | |
9405 | computes the same value, but in a more efficient manner (including | |
9406 | calls to other builtin functions). | |
9407 | ||
9408 | The call may contain arguments which need to be evaluated, but | |
9409 | which are not useful to determine the result of the call. In | |
9410 | this case we return a chain of COMPOUND_EXPRs. The LHS of each | |
9411 | COMPOUND_EXPR will be an argument which must be evaluated. | |
9412 | COMPOUND_EXPRs are chained through their RHS. The RHS of the last | |
9413 | COMPOUND_EXPR in the chain will contain the tree for the simplified | |
9414 | form of the builtin function call. */ | |
9415 | ||
9416 | static tree | |
389dd41b | 9417 | fold_builtin_strspn (location_t loc, tree s1, tree s2) |
4ee9c684 | 9418 | { |
c2f47e15 | 9419 | if (!validate_arg (s1, POINTER_TYPE) |
9420 | || !validate_arg (s2, POINTER_TYPE)) | |
9421 | return NULL_TREE; | |
4ee9c684 | 9422 | else |
9423 | { | |
4ee9c684 | 9424 | const char *p1 = c_getstr (s1), *p2 = c_getstr (s2); |
9425 | ||
c2f47e15 | 9426 | /* If either argument is "", return NULL_TREE. */ |
4ee9c684 | 9427 | if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0')) |
9bc9f15f | 9428 | /* Evaluate and ignore both arguments in case either one has |
9429 | side-effects. */ | |
389dd41b | 9430 | return omit_two_operands_loc (loc, size_type_node, size_zero_node, |
9bc9f15f | 9431 | s1, s2); |
c2f47e15 | 9432 | return NULL_TREE; |
4ee9c684 | 9433 | } |
9434 | } | |
9435 | ||
c2f47e15 | 9436 | /* Simplify a call to the strcspn builtin. S1 and S2 are the arguments |
9437 | to the call. | |
4ee9c684 | 9438 | |
c2f47e15 | 9439 | Return NULL_TREE if no simplification was possible, otherwise return the |
4ee9c684 | 9440 | simplified form of the call as a tree. |
9441 | ||
9442 | The simplified form may be a constant or other expression which | |
9443 | computes the same value, but in a more efficient manner (including | |
9444 | calls to other builtin functions). | |
9445 | ||
9446 | The call may contain arguments which need to be evaluated, but | |
9447 | which are not useful to determine the result of the call. In | |
9448 | this case we return a chain of COMPOUND_EXPRs. The LHS of each | |
9449 | COMPOUND_EXPR will be an argument which must be evaluated. | |
9450 | COMPOUND_EXPRs are chained through their RHS. The RHS of the last | |
9451 | COMPOUND_EXPR in the chain will contain the tree for the simplified | |
9452 | form of the builtin function call. */ | |
9453 | ||
9454 | static tree | |
389dd41b | 9455 | fold_builtin_strcspn (location_t loc, tree s1, tree s2) |
4ee9c684 | 9456 | { |
c2f47e15 | 9457 | if (!validate_arg (s1, POINTER_TYPE) |
9458 | || !validate_arg (s2, POINTER_TYPE)) | |
9459 | return NULL_TREE; | |
4ee9c684 | 9460 | else |
9461 | { | |
c2f47e15 | 9462 | /* If the first argument is "", return NULL_TREE. */ |
b5e46e2c | 9463 | const char *p1 = c_getstr (s1); |
4ee9c684 | 9464 | if (p1 && *p1 == '\0') |
9465 | { | |
9466 | /* Evaluate and ignore argument s2 in case it has | |
9467 | side-effects. */ | |
389dd41b | 9468 | return omit_one_operand_loc (loc, size_type_node, |
39761420 | 9469 | size_zero_node, s2); |
4ee9c684 | 9470 | } |
9471 | ||
9472 | /* If the second argument is "", return __builtin_strlen(s1). */ | |
b5e46e2c | 9473 | const char *p2 = c_getstr (s2); |
4ee9c684 | 9474 | if (p2 && *p2 == '\0') |
9475 | { | |
b9a16870 | 9476 | tree fn = builtin_decl_implicit (BUILT_IN_STRLEN); |
4ee9c684 | 9477 | |
9478 | /* If the replacement _DECL isn't initialized, don't do the | |
9479 | transformation. */ | |
9480 | if (!fn) | |
c2f47e15 | 9481 | return NULL_TREE; |
4ee9c684 | 9482 | |
389dd41b | 9483 | return build_call_expr_loc (loc, fn, 1, s1); |
4ee9c684 | 9484 | } |
c2f47e15 | 9485 | return NULL_TREE; |
4ee9c684 | 9486 | } |
9487 | } | |
9488 | ||
c2f47e15 | 9489 | /* Fold the next_arg or va_start call EXP. Returns true if there was an error |
743b0c6a | 9490 | produced. False otherwise. This is done so that we don't output the error |
9491 | or warning twice or three times. */ | |
75a70cf9 | 9492 | |
743b0c6a | 9493 | bool |
c2f47e15 | 9494 | fold_builtin_next_arg (tree exp, bool va_start_p) |
4ee9c684 | 9495 | { |
9496 | tree fntype = TREE_TYPE (current_function_decl); | |
c2f47e15 | 9497 | int nargs = call_expr_nargs (exp); |
9498 | tree arg; | |
d98fd4a4 | 9499 | /* There is good chance the current input_location points inside the |
9500 | definition of the va_start macro (perhaps on the token for | |
9501 | builtin) in a system header, so warnings will not be emitted. | |
9502 | Use the location in real source code. */ | |
9503 | source_location current_location = | |
9504 | linemap_unwind_to_first_non_reserved_loc (line_table, input_location, | |
9505 | NULL); | |
4ee9c684 | 9506 | |
257d99c3 | 9507 | if (!stdarg_p (fntype)) |
743b0c6a | 9508 | { |
9509 | error ("%<va_start%> used in function with fixed args"); | |
9510 | return true; | |
9511 | } | |
c2f47e15 | 9512 | |
9513 | if (va_start_p) | |
79012a9d | 9514 | { |
c2f47e15 | 9515 | if (va_start_p && (nargs != 2)) |
9516 | { | |
9517 | error ("wrong number of arguments to function %<va_start%>"); | |
9518 | return true; | |
9519 | } | |
9520 | arg = CALL_EXPR_ARG (exp, 1); | |
79012a9d | 9521 | } |
9522 | /* We use __builtin_va_start (ap, 0, 0) or __builtin_next_arg (0, 0) | |
9523 | when we checked the arguments and if needed issued a warning. */ | |
c2f47e15 | 9524 | else |
4ee9c684 | 9525 | { |
c2f47e15 | 9526 | if (nargs == 0) |
9527 | { | |
9528 | /* Evidently an out of date version of <stdarg.h>; can't validate | |
9529 | va_start's second argument, but can still work as intended. */ | |
d98fd4a4 | 9530 | warning_at (current_location, |
7edb1062 | 9531 | OPT_Wvarargs, |
9532 | "%<__builtin_next_arg%> called without an argument"); | |
c2f47e15 | 9533 | return true; |
9534 | } | |
9535 | else if (nargs > 1) | |
a0c938f0 | 9536 | { |
c2f47e15 | 9537 | error ("wrong number of arguments to function %<__builtin_next_arg%>"); |
a0c938f0 | 9538 | return true; |
9539 | } | |
c2f47e15 | 9540 | arg = CALL_EXPR_ARG (exp, 0); |
9541 | } | |
9542 | ||
a8dd994c | 9543 | if (TREE_CODE (arg) == SSA_NAME) |
9544 | arg = SSA_NAME_VAR (arg); | |
9545 | ||
c2f47e15 | 9546 | /* We destructively modify the call to be __builtin_va_start (ap, 0) |
48e1416a | 9547 | or __builtin_next_arg (0) the first time we see it, after checking |
c2f47e15 | 9548 | the arguments and if needed issuing a warning. */ |
9549 | if (!integer_zerop (arg)) | |
9550 | { | |
9551 | tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl)); | |
79012a9d | 9552 | |
4ee9c684 | 9553 | /* Strip off all nops for the sake of the comparison. This |
9554 | is not quite the same as STRIP_NOPS. It does more. | |
9555 | We must also strip off INDIRECT_EXPR for C++ reference | |
9556 | parameters. */ | |
72dd6141 | 9557 | while (CONVERT_EXPR_P (arg) |
4ee9c684 | 9558 | || TREE_CODE (arg) == INDIRECT_REF) |
9559 | arg = TREE_OPERAND (arg, 0); | |
9560 | if (arg != last_parm) | |
a0c938f0 | 9561 | { |
b08cf617 | 9562 | /* FIXME: Sometimes with the tree optimizers we can get the |
9563 | not the last argument even though the user used the last | |
9564 | argument. We just warn and set the arg to be the last | |
9565 | argument so that we will get wrong-code because of | |
9566 | it. */ | |
d98fd4a4 | 9567 | warning_at (current_location, |
7edb1062 | 9568 | OPT_Wvarargs, |
d98fd4a4 | 9569 | "second parameter of %<va_start%> not last named argument"); |
743b0c6a | 9570 | } |
24158ad7 | 9571 | |
9572 | /* Undefined by C99 7.15.1.4p4 (va_start): | |
9573 | "If the parameter parmN is declared with the register storage | |
9574 | class, with a function or array type, or with a type that is | |
9575 | not compatible with the type that results after application of | |
9576 | the default argument promotions, the behavior is undefined." | |
9577 | */ | |
9578 | else if (DECL_REGISTER (arg)) | |
d98fd4a4 | 9579 | { |
9580 | warning_at (current_location, | |
7edb1062 | 9581 | OPT_Wvarargs, |
67cf9b55 | 9582 | "undefined behavior when second parameter of " |
d98fd4a4 | 9583 | "%<va_start%> is declared with %<register%> storage"); |
9584 | } | |
24158ad7 | 9585 | |
79012a9d | 9586 | /* We want to verify the second parameter just once before the tree |
a0c938f0 | 9587 | optimizers are run and then avoid keeping it in the tree, |
9588 | as otherwise we could warn even for correct code like: | |
9589 | void foo (int i, ...) | |
9590 | { va_list ap; i++; va_start (ap, i); va_end (ap); } */ | |
c2f47e15 | 9591 | if (va_start_p) |
9592 | CALL_EXPR_ARG (exp, 1) = integer_zero_node; | |
9593 | else | |
9594 | CALL_EXPR_ARG (exp, 0) = integer_zero_node; | |
743b0c6a | 9595 | } |
9596 | return false; | |
4ee9c684 | 9597 | } |
9598 | ||
9599 | ||
c2f47e15 | 9600 | /* Expand a call EXP to __builtin_object_size. */ |
0a39fd54 | 9601 | |
f7715905 | 9602 | static rtx |
0a39fd54 | 9603 | expand_builtin_object_size (tree exp) |
9604 | { | |
9605 | tree ost; | |
9606 | int object_size_type; | |
9607 | tree fndecl = get_callee_fndecl (exp); | |
0a39fd54 | 9608 | |
c2f47e15 | 9609 | if (!validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)) |
0a39fd54 | 9610 | { |
8c41abe8 | 9611 | error ("%Kfirst argument of %qD must be a pointer, second integer constant", |
b8c23db3 | 9612 | exp, fndecl); |
0a39fd54 | 9613 | expand_builtin_trap (); |
9614 | return const0_rtx; | |
9615 | } | |
9616 | ||
c2f47e15 | 9617 | ost = CALL_EXPR_ARG (exp, 1); |
0a39fd54 | 9618 | STRIP_NOPS (ost); |
9619 | ||
9620 | if (TREE_CODE (ost) != INTEGER_CST | |
9621 | || tree_int_cst_sgn (ost) < 0 | |
9622 | || compare_tree_int (ost, 3) > 0) | |
9623 | { | |
8c41abe8 | 9624 | error ("%Klast argument of %qD is not integer constant between 0 and 3", |
b8c23db3 | 9625 | exp, fndecl); |
0a39fd54 | 9626 | expand_builtin_trap (); |
9627 | return const0_rtx; | |
9628 | } | |
9629 | ||
e913b5cd | 9630 | object_size_type = tree_to_shwi (ost); |
0a39fd54 | 9631 | |
9632 | return object_size_type < 2 ? constm1_rtx : const0_rtx; | |
9633 | } | |
9634 | ||
9635 | /* Expand EXP, a call to the __mem{cpy,pcpy,move,set}_chk builtin. | |
9636 | FCODE is the BUILT_IN_* to use. | |
c2f47e15 | 9637 | Return NULL_RTX if we failed; the caller should emit a normal call, |
0a39fd54 | 9638 | otherwise try to get the result in TARGET, if convenient (and in |
9639 | mode MODE if that's convenient). */ | |
9640 | ||
9641 | static rtx | |
3754d046 | 9642 | expand_builtin_memory_chk (tree exp, rtx target, machine_mode mode, |
0a39fd54 | 9643 | enum built_in_function fcode) |
9644 | { | |
0a39fd54 | 9645 | tree dest, src, len, size; |
9646 | ||
c2f47e15 | 9647 | if (!validate_arglist (exp, |
0a39fd54 | 9648 | POINTER_TYPE, |
9649 | fcode == BUILT_IN_MEMSET_CHK | |
9650 | ? INTEGER_TYPE : POINTER_TYPE, | |
9651 | INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE)) | |
c2f47e15 | 9652 | return NULL_RTX; |
0a39fd54 | 9653 | |
c2f47e15 | 9654 | dest = CALL_EXPR_ARG (exp, 0); |
9655 | src = CALL_EXPR_ARG (exp, 1); | |
9656 | len = CALL_EXPR_ARG (exp, 2); | |
9657 | size = CALL_EXPR_ARG (exp, 3); | |
0a39fd54 | 9658 | |
5aef8938 | 9659 | bool sizes_ok = check_sizes (OPT_Wstringop_overflow_, |
9660 | exp, len, /*maxlen=*/NULL_TREE, | |
9661 | /*str=*/NULL_TREE, size); | |
9662 | ||
9663 | if (!tree_fits_uhwi_p (size)) | |
c2f47e15 | 9664 | return NULL_RTX; |
0a39fd54 | 9665 | |
e913b5cd | 9666 | if (tree_fits_uhwi_p (len) || integer_all_onesp (size)) |
0a39fd54 | 9667 | { |
5aef8938 | 9668 | /* Avoid transforming the checking call to an ordinary one when |
9669 | an overflow has been detected or when the call couldn't be | |
9670 | validated because the size is not constant. */ | |
9671 | if (!sizes_ok && !integer_all_onesp (size) && tree_int_cst_lt (size, len)) | |
9672 | return NULL_RTX; | |
0a39fd54 | 9673 | |
5aef8938 | 9674 | tree fn = NULL_TREE; |
0a39fd54 | 9675 | /* If __builtin_mem{cpy,pcpy,move,set}_chk is used, assume |
9676 | mem{cpy,pcpy,move,set} is available. */ | |
9677 | switch (fcode) | |
9678 | { | |
9679 | case BUILT_IN_MEMCPY_CHK: | |
b9a16870 | 9680 | fn = builtin_decl_explicit (BUILT_IN_MEMCPY); |
0a39fd54 | 9681 | break; |
9682 | case BUILT_IN_MEMPCPY_CHK: | |
b9a16870 | 9683 | fn = builtin_decl_explicit (BUILT_IN_MEMPCPY); |
0a39fd54 | 9684 | break; |
9685 | case BUILT_IN_MEMMOVE_CHK: | |
b9a16870 | 9686 | fn = builtin_decl_explicit (BUILT_IN_MEMMOVE); |
0a39fd54 | 9687 | break; |
9688 | case BUILT_IN_MEMSET_CHK: | |
b9a16870 | 9689 | fn = builtin_decl_explicit (BUILT_IN_MEMSET); |
0a39fd54 | 9690 | break; |
9691 | default: | |
9692 | break; | |
9693 | } | |
9694 | ||
9695 | if (! fn) | |
c2f47e15 | 9696 | return NULL_RTX; |
0a39fd54 | 9697 | |
0568e9c1 | 9698 | fn = build_call_nofold_loc (EXPR_LOCATION (exp), fn, 3, dest, src, len); |
a65c4d64 | 9699 | gcc_assert (TREE_CODE (fn) == CALL_EXPR); |
9700 | CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp); | |
0a39fd54 | 9701 | return expand_expr (fn, target, mode, EXPAND_NORMAL); |
9702 | } | |
9703 | else if (fcode == BUILT_IN_MEMSET_CHK) | |
c2f47e15 | 9704 | return NULL_RTX; |
0a39fd54 | 9705 | else |
9706 | { | |
957d0361 | 9707 | unsigned int dest_align = get_pointer_alignment (dest); |
0a39fd54 | 9708 | |
9709 | /* If DEST is not a pointer type, call the normal function. */ | |
9710 | if (dest_align == 0) | |
c2f47e15 | 9711 | return NULL_RTX; |
0a39fd54 | 9712 | |
9713 | /* If SRC and DEST are the same (and not volatile), do nothing. */ | |
9714 | if (operand_equal_p (src, dest, 0)) | |
9715 | { | |
9716 | tree expr; | |
9717 | ||
9718 | if (fcode != BUILT_IN_MEMPCPY_CHK) | |
9719 | { | |
9720 | /* Evaluate and ignore LEN in case it has side-effects. */ | |
9721 | expand_expr (len, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
9722 | return expand_expr (dest, target, mode, EXPAND_NORMAL); | |
9723 | } | |
9724 | ||
2cc66f2a | 9725 | expr = fold_build_pointer_plus (dest, len); |
0a39fd54 | 9726 | return expand_expr (expr, target, mode, EXPAND_NORMAL); |
9727 | } | |
9728 | ||
9729 | /* __memmove_chk special case. */ | |
9730 | if (fcode == BUILT_IN_MEMMOVE_CHK) | |
9731 | { | |
957d0361 | 9732 | unsigned int src_align = get_pointer_alignment (src); |
0a39fd54 | 9733 | |
9734 | if (src_align == 0) | |
c2f47e15 | 9735 | return NULL_RTX; |
0a39fd54 | 9736 | |
9737 | /* If src is categorized for a readonly section we can use | |
9738 | normal __memcpy_chk. */ | |
9739 | if (readonly_data_expr (src)) | |
9740 | { | |
b9a16870 | 9741 | tree fn = builtin_decl_explicit (BUILT_IN_MEMCPY_CHK); |
0a39fd54 | 9742 | if (!fn) |
c2f47e15 | 9743 | return NULL_RTX; |
0568e9c1 | 9744 | fn = build_call_nofold_loc (EXPR_LOCATION (exp), fn, 4, |
9745 | dest, src, len, size); | |
a65c4d64 | 9746 | gcc_assert (TREE_CODE (fn) == CALL_EXPR); |
9747 | CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp); | |
0a39fd54 | 9748 | return expand_expr (fn, target, mode, EXPAND_NORMAL); |
9749 | } | |
9750 | } | |
c2f47e15 | 9751 | return NULL_RTX; |
0a39fd54 | 9752 | } |
9753 | } | |
9754 | ||
9755 | /* Emit warning if a buffer overflow is detected at compile time. */ | |
9756 | ||
9757 | static void | |
9758 | maybe_emit_chk_warning (tree exp, enum built_in_function fcode) | |
9759 | { | |
5aef8938 | 9760 | /* The source string. */ |
9761 | tree srcstr = NULL_TREE; | |
9762 | /* The size of the destination object. */ | |
9763 | tree objsize = NULL_TREE; | |
9764 | /* The string that is being concatenated with (as in __strcat_chk) | |
9765 | or null if it isn't. */ | |
9766 | tree catstr = NULL_TREE; | |
9767 | /* The maximum length of the source sequence in a bounded operation | |
9768 | (such as __strncat_chk) or null if the operation isn't bounded | |
9769 | (such as __strcat_chk). */ | |
9770 | tree maxlen = NULL_TREE; | |
0a39fd54 | 9771 | |
9772 | switch (fcode) | |
9773 | { | |
9774 | case BUILT_IN_STRCPY_CHK: | |
9775 | case BUILT_IN_STPCPY_CHK: | |
5aef8938 | 9776 | srcstr = CALL_EXPR_ARG (exp, 1); |
9777 | objsize = CALL_EXPR_ARG (exp, 2); | |
9778 | break; | |
9779 | ||
0a39fd54 | 9780 | case BUILT_IN_STRCAT_CHK: |
5aef8938 | 9781 | /* For __strcat_chk the warning will be emitted only if overflowing |
9782 | by at least strlen (dest) + 1 bytes. */ | |
9783 | catstr = CALL_EXPR_ARG (exp, 0); | |
9784 | srcstr = CALL_EXPR_ARG (exp, 1); | |
9785 | objsize = CALL_EXPR_ARG (exp, 2); | |
0a39fd54 | 9786 | break; |
5aef8938 | 9787 | |
b356dfef | 9788 | case BUILT_IN_STRNCAT_CHK: |
5aef8938 | 9789 | catstr = CALL_EXPR_ARG (exp, 0); |
9790 | srcstr = CALL_EXPR_ARG (exp, 1); | |
9791 | maxlen = CALL_EXPR_ARG (exp, 2); | |
9792 | objsize = CALL_EXPR_ARG (exp, 3); | |
9793 | break; | |
9794 | ||
0a39fd54 | 9795 | case BUILT_IN_STRNCPY_CHK: |
1063acde | 9796 | case BUILT_IN_STPNCPY_CHK: |
5aef8938 | 9797 | srcstr = CALL_EXPR_ARG (exp, 1); |
9798 | maxlen = CALL_EXPR_ARG (exp, 2); | |
9799 | objsize = CALL_EXPR_ARG (exp, 3); | |
0a39fd54 | 9800 | break; |
5aef8938 | 9801 | |
0a39fd54 | 9802 | case BUILT_IN_SNPRINTF_CHK: |
9803 | case BUILT_IN_VSNPRINTF_CHK: | |
5aef8938 | 9804 | maxlen = CALL_EXPR_ARG (exp, 1); |
9805 | objsize = CALL_EXPR_ARG (exp, 3); | |
0a39fd54 | 9806 | break; |
9807 | default: | |
9808 | gcc_unreachable (); | |
9809 | } | |
9810 | ||
5aef8938 | 9811 | if (catstr && maxlen) |
0a39fd54 | 9812 | { |
5aef8938 | 9813 | /* Check __strncat_chk. There is no way to determine the length |
9814 | of the string to which the source string is being appended so | |
9815 | just warn when the length of the source string is not known. */ | |
8d6c6ef5 | 9816 | check_strncat_sizes (exp, objsize); |
9817 | return; | |
0a39fd54 | 9818 | } |
0a39fd54 | 9819 | |
5aef8938 | 9820 | check_sizes (OPT_Wstringop_overflow_, exp, |
9821 | /*size=*/NULL_TREE, maxlen, srcstr, objsize); | |
0a39fd54 | 9822 | } |
9823 | ||
9824 | /* Emit warning if a buffer overflow is detected at compile time | |
9825 | in __sprintf_chk/__vsprintf_chk calls. */ | |
9826 | ||
9827 | static void | |
9828 | maybe_emit_sprintf_chk_warning (tree exp, enum built_in_function fcode) | |
9829 | { | |
1e4adcfc | 9830 | tree size, len, fmt; |
0a39fd54 | 9831 | const char *fmt_str; |
c2f47e15 | 9832 | int nargs = call_expr_nargs (exp); |
0a39fd54 | 9833 | |
9834 | /* Verify the required arguments in the original call. */ | |
48e1416a | 9835 | |
c2f47e15 | 9836 | if (nargs < 4) |
0a39fd54 | 9837 | return; |
c2f47e15 | 9838 | size = CALL_EXPR_ARG (exp, 2); |
9839 | fmt = CALL_EXPR_ARG (exp, 3); | |
0a39fd54 | 9840 | |
e913b5cd | 9841 | if (! tree_fits_uhwi_p (size) || integer_all_onesp (size)) |
0a39fd54 | 9842 | return; |
9843 | ||
9844 | /* Check whether the format is a literal string constant. */ | |
9845 | fmt_str = c_getstr (fmt); | |
9846 | if (fmt_str == NULL) | |
9847 | return; | |
9848 | ||
d4473c84 | 9849 | if (!init_target_chars ()) |
99eabcc1 | 9850 | return; |
9851 | ||
0a39fd54 | 9852 | /* If the format doesn't contain % args or %%, we know its size. */ |
99eabcc1 | 9853 | if (strchr (fmt_str, target_percent) == 0) |
0a39fd54 | 9854 | len = build_int_cstu (size_type_node, strlen (fmt_str)); |
9855 | /* If the format is "%s" and first ... argument is a string literal, | |
9856 | we know it too. */ | |
c2f47e15 | 9857 | else if (fcode == BUILT_IN_SPRINTF_CHK |
9858 | && strcmp (fmt_str, target_percent_s) == 0) | |
0a39fd54 | 9859 | { |
9860 | tree arg; | |
9861 | ||
c2f47e15 | 9862 | if (nargs < 5) |
0a39fd54 | 9863 | return; |
c2f47e15 | 9864 | arg = CALL_EXPR_ARG (exp, 4); |
0a39fd54 | 9865 | if (! POINTER_TYPE_P (TREE_TYPE (arg))) |
9866 | return; | |
9867 | ||
9868 | len = c_strlen (arg, 1); | |
e913b5cd | 9869 | if (!len || ! tree_fits_uhwi_p (len)) |
0a39fd54 | 9870 | return; |
9871 | } | |
9872 | else | |
9873 | return; | |
9874 | ||
5aef8938 | 9875 | /* Add one for the terminating nul. */ |
9876 | len = fold_build2 (PLUS_EXPR, TREE_TYPE (len), len, size_one_node); | |
9877 | check_sizes (OPT_Wstringop_overflow_, | |
9878 | exp, /*size=*/NULL_TREE, /*maxlen=*/NULL_TREE, len, size); | |
0a39fd54 | 9879 | } |
9880 | ||
2c281b15 | 9881 | /* Emit warning if a free is called with address of a variable. */ |
9882 | ||
9883 | static void | |
9884 | maybe_emit_free_warning (tree exp) | |
9885 | { | |
9886 | tree arg = CALL_EXPR_ARG (exp, 0); | |
9887 | ||
9888 | STRIP_NOPS (arg); | |
9889 | if (TREE_CODE (arg) != ADDR_EXPR) | |
9890 | return; | |
9891 | ||
9892 | arg = get_base_address (TREE_OPERAND (arg, 0)); | |
182cf5a9 | 9893 | if (arg == NULL || INDIRECT_REF_P (arg) || TREE_CODE (arg) == MEM_REF) |
2c281b15 | 9894 | return; |
9895 | ||
9896 | if (SSA_VAR_P (arg)) | |
f74ea1c2 | 9897 | warning_at (tree_nonartificial_location (exp), OPT_Wfree_nonheap_object, |
9898 | "%Kattempt to free a non-heap object %qD", exp, arg); | |
2c281b15 | 9899 | else |
f74ea1c2 | 9900 | warning_at (tree_nonartificial_location (exp), OPT_Wfree_nonheap_object, |
9901 | "%Kattempt to free a non-heap object", exp); | |
2c281b15 | 9902 | } |
9903 | ||
c2f47e15 | 9904 | /* Fold a call to __builtin_object_size with arguments PTR and OST, |
9905 | if possible. */ | |
0a39fd54 | 9906 | |
f7715905 | 9907 | static tree |
c2f47e15 | 9908 | fold_builtin_object_size (tree ptr, tree ost) |
0a39fd54 | 9909 | { |
a6caa15f | 9910 | unsigned HOST_WIDE_INT bytes; |
0a39fd54 | 9911 | int object_size_type; |
9912 | ||
c2f47e15 | 9913 | if (!validate_arg (ptr, POINTER_TYPE) |
9914 | || !validate_arg (ost, INTEGER_TYPE)) | |
9915 | return NULL_TREE; | |
0a39fd54 | 9916 | |
0a39fd54 | 9917 | STRIP_NOPS (ost); |
9918 | ||
9919 | if (TREE_CODE (ost) != INTEGER_CST | |
9920 | || tree_int_cst_sgn (ost) < 0 | |
9921 | || compare_tree_int (ost, 3) > 0) | |
c2f47e15 | 9922 | return NULL_TREE; |
0a39fd54 | 9923 | |
e913b5cd | 9924 | object_size_type = tree_to_shwi (ost); |
0a39fd54 | 9925 | |
9926 | /* __builtin_object_size doesn't evaluate side-effects in its arguments; | |
9927 | if there are any side-effects, it returns (size_t) -1 for types 0 and 1 | |
9928 | and (size_t) 0 for types 2 and 3. */ | |
9929 | if (TREE_SIDE_EFFECTS (ptr)) | |
697bbc3f | 9930 | return build_int_cst_type (size_type_node, object_size_type < 2 ? -1 : 0); |
0a39fd54 | 9931 | |
9932 | if (TREE_CODE (ptr) == ADDR_EXPR) | |
a6caa15f | 9933 | { |
4e91a07b | 9934 | compute_builtin_object_size (ptr, object_size_type, &bytes); |
6da74b21 | 9935 | if (wi::fits_to_tree_p (bytes, size_type_node)) |
9936 | return build_int_cstu (size_type_node, bytes); | |
a6caa15f | 9937 | } |
0a39fd54 | 9938 | else if (TREE_CODE (ptr) == SSA_NAME) |
9939 | { | |
0a39fd54 | 9940 | /* If object size is not known yet, delay folding until |
9941 | later. Maybe subsequent passes will help determining | |
9942 | it. */ | |
4e91a07b | 9943 | if (compute_builtin_object_size (ptr, object_size_type, &bytes) |
9944 | && wi::fits_to_tree_p (bytes, size_type_node)) | |
6da74b21 | 9945 | return build_int_cstu (size_type_node, bytes); |
0a39fd54 | 9946 | } |
9947 | ||
a6caa15f | 9948 | return NULL_TREE; |
0a39fd54 | 9949 | } |
9950 | ||
12f08300 | 9951 | /* Builtins with folding operations that operate on "..." arguments |
9952 | need special handling; we need to store the arguments in a convenient | |
9953 | data structure before attempting any folding. Fortunately there are | |
9954 | only a few builtins that fall into this category. FNDECL is the | |
9955 | function, EXP is the CALL_EXPR for the call. */ | |
9956 | ||
9957 | static tree | |
9958 | fold_builtin_varargs (location_t loc, tree fndecl, tree *args, int nargs) | |
9959 | { | |
9960 | enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); | |
9961 | tree ret = NULL_TREE; | |
9962 | ||
9963 | switch (fcode) | |
9964 | { | |
9965 | case BUILT_IN_FPCLASSIFY: | |
9966 | ret = fold_builtin_fpclassify (loc, args, nargs); | |
9967 | break; | |
9968 | ||
9969 | default: | |
9970 | break; | |
9971 | } | |
9972 | if (ret) | |
9973 | { | |
9974 | ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret); | |
9975 | SET_EXPR_LOCATION (ret, loc); | |
9976 | TREE_NO_WARNING (ret) = 1; | |
9977 | return ret; | |
9978 | } | |
9979 | return NULL_TREE; | |
9980 | } | |
9981 | ||
99eabcc1 | 9982 | /* Initialize format string characters in the target charset. */ |
9983 | ||
b9ea678c | 9984 | bool |
99eabcc1 | 9985 | init_target_chars (void) |
9986 | { | |
9987 | static bool init; | |
9988 | if (!init) | |
9989 | { | |
9990 | target_newline = lang_hooks.to_target_charset ('\n'); | |
9991 | target_percent = lang_hooks.to_target_charset ('%'); | |
9992 | target_c = lang_hooks.to_target_charset ('c'); | |
9993 | target_s = lang_hooks.to_target_charset ('s'); | |
9994 | if (target_newline == 0 || target_percent == 0 || target_c == 0 | |
9995 | || target_s == 0) | |
9996 | return false; | |
9997 | ||
9998 | target_percent_c[0] = target_percent; | |
9999 | target_percent_c[1] = target_c; | |
10000 | target_percent_c[2] = '\0'; | |
10001 | ||
10002 | target_percent_s[0] = target_percent; | |
10003 | target_percent_s[1] = target_s; | |
10004 | target_percent_s[2] = '\0'; | |
10005 | ||
10006 | target_percent_s_newline[0] = target_percent; | |
10007 | target_percent_s_newline[1] = target_s; | |
10008 | target_percent_s_newline[2] = target_newline; | |
10009 | target_percent_s_newline[3] = '\0'; | |
a0c938f0 | 10010 | |
99eabcc1 | 10011 | init = true; |
10012 | } | |
10013 | return true; | |
10014 | } | |
bffb7645 | 10015 | |
f0c477f2 | 10016 | /* Helper function for do_mpfr_arg*(). Ensure M is a normal number |
10017 | and no overflow/underflow occurred. INEXACT is true if M was not | |
fa7637bd | 10018 | exactly calculated. TYPE is the tree type for the result. This |
f0c477f2 | 10019 | function assumes that you cleared the MPFR flags and then |
10020 | calculated M to see if anything subsequently set a flag prior to | |
10021 | entering this function. Return NULL_TREE if any checks fail. */ | |
10022 | ||
10023 | static tree | |
d4473c84 | 10024 | do_mpfr_ckconv (mpfr_srcptr m, tree type, int inexact) |
f0c477f2 | 10025 | { |
10026 | /* Proceed iff we get a normal number, i.e. not NaN or Inf and no | |
10027 | overflow/underflow occurred. If -frounding-math, proceed iff the | |
10028 | result of calling FUNC was exact. */ | |
d4473c84 | 10029 | if (mpfr_number_p (m) && !mpfr_overflow_p () && !mpfr_underflow_p () |
f0c477f2 | 10030 | && (!flag_rounding_math || !inexact)) |
10031 | { | |
10032 | REAL_VALUE_TYPE rr; | |
10033 | ||
66fa16e6 | 10034 | real_from_mpfr (&rr, m, type, GMP_RNDN); |
f0c477f2 | 10035 | /* Proceed iff GCC's REAL_VALUE_TYPE can hold the MPFR value, |
10036 | check for overflow/underflow. If the REAL_VALUE_TYPE is zero | |
10037 | but the mpft_t is not, then we underflowed in the | |
10038 | conversion. */ | |
776a7bab | 10039 | if (real_isfinite (&rr) |
f0c477f2 | 10040 | && (rr.cl == rvc_zero) == (mpfr_zero_p (m) != 0)) |
10041 | { | |
10042 | REAL_VALUE_TYPE rmode; | |
10043 | ||
10044 | real_convert (&rmode, TYPE_MODE (type), &rr); | |
10045 | /* Proceed iff the specified mode can hold the value. */ | |
10046 | if (real_identical (&rmode, &rr)) | |
10047 | return build_real (type, rmode); | |
10048 | } | |
10049 | } | |
10050 | return NULL_TREE; | |
10051 | } | |
10052 | ||
239d491a | 10053 | /* Helper function for do_mpc_arg*(). Ensure M is a normal complex |
10054 | number and no overflow/underflow occurred. INEXACT is true if M | |
10055 | was not exactly calculated. TYPE is the tree type for the result. | |
10056 | This function assumes that you cleared the MPFR flags and then | |
10057 | calculated M to see if anything subsequently set a flag prior to | |
652d9409 | 10058 | entering this function. Return NULL_TREE if any checks fail, if |
10059 | FORCE_CONVERT is true, then bypass the checks. */ | |
239d491a | 10060 | |
10061 | static tree | |
652d9409 | 10062 | do_mpc_ckconv (mpc_srcptr m, tree type, int inexact, int force_convert) |
239d491a | 10063 | { |
10064 | /* Proceed iff we get a normal number, i.e. not NaN or Inf and no | |
10065 | overflow/underflow occurred. If -frounding-math, proceed iff the | |
10066 | result of calling FUNC was exact. */ | |
652d9409 | 10067 | if (force_convert |
10068 | || (mpfr_number_p (mpc_realref (m)) && mpfr_number_p (mpc_imagref (m)) | |
10069 | && !mpfr_overflow_p () && !mpfr_underflow_p () | |
10070 | && (!flag_rounding_math || !inexact))) | |
239d491a | 10071 | { |
10072 | REAL_VALUE_TYPE re, im; | |
10073 | ||
b0e7c4d4 | 10074 | real_from_mpfr (&re, mpc_realref (m), TREE_TYPE (type), GMP_RNDN); |
10075 | real_from_mpfr (&im, mpc_imagref (m), TREE_TYPE (type), GMP_RNDN); | |
239d491a | 10076 | /* Proceed iff GCC's REAL_VALUE_TYPE can hold the MPFR values, |
10077 | check for overflow/underflow. If the REAL_VALUE_TYPE is zero | |
10078 | but the mpft_t is not, then we underflowed in the | |
10079 | conversion. */ | |
652d9409 | 10080 | if (force_convert |
10081 | || (real_isfinite (&re) && real_isfinite (&im) | |
10082 | && (re.cl == rvc_zero) == (mpfr_zero_p (mpc_realref (m)) != 0) | |
10083 | && (im.cl == rvc_zero) == (mpfr_zero_p (mpc_imagref (m)) != 0))) | |
239d491a | 10084 | { |
10085 | REAL_VALUE_TYPE re_mode, im_mode; | |
10086 | ||
10087 | real_convert (&re_mode, TYPE_MODE (TREE_TYPE (type)), &re); | |
10088 | real_convert (&im_mode, TYPE_MODE (TREE_TYPE (type)), &im); | |
10089 | /* Proceed iff the specified mode can hold the value. */ | |
652d9409 | 10090 | if (force_convert |
10091 | || (real_identical (&re_mode, &re) | |
10092 | && real_identical (&im_mode, &im))) | |
239d491a | 10093 | return build_complex (type, build_real (TREE_TYPE (type), re_mode), |
10094 | build_real (TREE_TYPE (type), im_mode)); | |
10095 | } | |
10096 | } | |
10097 | return NULL_TREE; | |
10098 | } | |
239d491a | 10099 | |
e5407ca6 | 10100 | /* If arguments ARG0 and ARG1 are REAL_CSTs, call mpfr_remquo() to set |
10101 | the pointer *(ARG_QUO) and return the result. The type is taken | |
10102 | from the type of ARG0 and is used for setting the precision of the | |
10103 | calculation and results. */ | |
10104 | ||
10105 | static tree | |
10106 | do_mpfr_remquo (tree arg0, tree arg1, tree arg_quo) | |
10107 | { | |
10108 | tree const type = TREE_TYPE (arg0); | |
10109 | tree result = NULL_TREE; | |
48e1416a | 10110 | |
e5407ca6 | 10111 | STRIP_NOPS (arg0); |
10112 | STRIP_NOPS (arg1); | |
48e1416a | 10113 | |
e5407ca6 | 10114 | /* To proceed, MPFR must exactly represent the target floating point |
10115 | format, which only happens when the target base equals two. */ | |
10116 | if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2 | |
10117 | && TREE_CODE (arg0) == REAL_CST && !TREE_OVERFLOW (arg0) | |
10118 | && TREE_CODE (arg1) == REAL_CST && !TREE_OVERFLOW (arg1)) | |
10119 | { | |
10120 | const REAL_VALUE_TYPE *const ra0 = TREE_REAL_CST_PTR (arg0); | |
10121 | const REAL_VALUE_TYPE *const ra1 = TREE_REAL_CST_PTR (arg1); | |
10122 | ||
776a7bab | 10123 | if (real_isfinite (ra0) && real_isfinite (ra1)) |
e5407ca6 | 10124 | { |
e2eb2b7f | 10125 | const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type)); |
10126 | const int prec = fmt->p; | |
10127 | const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN; | |
e5407ca6 | 10128 | tree result_rem; |
10129 | long integer_quo; | |
10130 | mpfr_t m0, m1; | |
10131 | ||
10132 | mpfr_inits2 (prec, m0, m1, NULL); | |
10133 | mpfr_from_real (m0, ra0, GMP_RNDN); | |
10134 | mpfr_from_real (m1, ra1, GMP_RNDN); | |
10135 | mpfr_clear_flags (); | |
e2eb2b7f | 10136 | mpfr_remquo (m0, &integer_quo, m0, m1, rnd); |
e5407ca6 | 10137 | /* Remquo is independent of the rounding mode, so pass |
10138 | inexact=0 to do_mpfr_ckconv(). */ | |
10139 | result_rem = do_mpfr_ckconv (m0, type, /*inexact=*/ 0); | |
10140 | mpfr_clears (m0, m1, NULL); | |
10141 | if (result_rem) | |
10142 | { | |
10143 | /* MPFR calculates quo in the host's long so it may | |
10144 | return more bits in quo than the target int can hold | |
10145 | if sizeof(host long) > sizeof(target int). This can | |
10146 | happen even for native compilers in LP64 mode. In | |
10147 | these cases, modulo the quo value with the largest | |
10148 | number that the target int can hold while leaving one | |
10149 | bit for the sign. */ | |
10150 | if (sizeof (integer_quo) * CHAR_BIT > INT_TYPE_SIZE) | |
10151 | integer_quo %= (long)(1UL << (INT_TYPE_SIZE - 1)); | |
10152 | ||
10153 | /* Dereference the quo pointer argument. */ | |
10154 | arg_quo = build_fold_indirect_ref (arg_quo); | |
10155 | /* Proceed iff a valid pointer type was passed in. */ | |
10156 | if (TYPE_MAIN_VARIANT (TREE_TYPE (arg_quo)) == integer_type_node) | |
10157 | { | |
10158 | /* Set the value. */ | |
7002a1c8 | 10159 | tree result_quo |
10160 | = fold_build2 (MODIFY_EXPR, TREE_TYPE (arg_quo), arg_quo, | |
10161 | build_int_cst (TREE_TYPE (arg_quo), | |
10162 | integer_quo)); | |
e5407ca6 | 10163 | TREE_SIDE_EFFECTS (result_quo) = 1; |
10164 | /* Combine the quo assignment with the rem. */ | |
10165 | result = non_lvalue (fold_build2 (COMPOUND_EXPR, type, | |
10166 | result_quo, result_rem)); | |
10167 | } | |
10168 | } | |
10169 | } | |
10170 | } | |
10171 | return result; | |
10172 | } | |
e84da7c1 | 10173 | |
10174 | /* If ARG is a REAL_CST, call mpfr_lgamma() on it and return the | |
10175 | resulting value as a tree with type TYPE. The mpfr precision is | |
10176 | set to the precision of TYPE. We assume that this mpfr function | |
10177 | returns zero if the result could be calculated exactly within the | |
10178 | requested precision. In addition, the integer pointer represented | |
10179 | by ARG_SG will be dereferenced and set to the appropriate signgam | |
10180 | (-1,1) value. */ | |
10181 | ||
10182 | static tree | |
10183 | do_mpfr_lgamma_r (tree arg, tree arg_sg, tree type) | |
10184 | { | |
10185 | tree result = NULL_TREE; | |
10186 | ||
10187 | STRIP_NOPS (arg); | |
48e1416a | 10188 | |
e84da7c1 | 10189 | /* To proceed, MPFR must exactly represent the target floating point |
10190 | format, which only happens when the target base equals two. Also | |
10191 | verify ARG is a constant and that ARG_SG is an int pointer. */ | |
10192 | if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2 | |
10193 | && TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg) | |
10194 | && TREE_CODE (TREE_TYPE (arg_sg)) == POINTER_TYPE | |
10195 | && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (arg_sg))) == integer_type_node) | |
10196 | { | |
10197 | const REAL_VALUE_TYPE *const ra = TREE_REAL_CST_PTR (arg); | |
10198 | ||
10199 | /* In addition to NaN and Inf, the argument cannot be zero or a | |
10200 | negative integer. */ | |
776a7bab | 10201 | if (real_isfinite (ra) |
e84da7c1 | 10202 | && ra->cl != rvc_zero |
9af5ce0c | 10203 | && !(real_isneg (ra) && real_isinteger (ra, TYPE_MODE (type)))) |
e84da7c1 | 10204 | { |
e2eb2b7f | 10205 | const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type)); |
10206 | const int prec = fmt->p; | |
10207 | const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN; | |
e84da7c1 | 10208 | int inexact, sg; |
10209 | mpfr_t m; | |
10210 | tree result_lg; | |
10211 | ||
10212 | mpfr_init2 (m, prec); | |
10213 | mpfr_from_real (m, ra, GMP_RNDN); | |
10214 | mpfr_clear_flags (); | |
e2eb2b7f | 10215 | inexact = mpfr_lgamma (m, &sg, m, rnd); |
e84da7c1 | 10216 | result_lg = do_mpfr_ckconv (m, type, inexact); |
10217 | mpfr_clear (m); | |
10218 | if (result_lg) | |
10219 | { | |
10220 | tree result_sg; | |
10221 | ||
10222 | /* Dereference the arg_sg pointer argument. */ | |
10223 | arg_sg = build_fold_indirect_ref (arg_sg); | |
10224 | /* Assign the signgam value into *arg_sg. */ | |
10225 | result_sg = fold_build2 (MODIFY_EXPR, | |
10226 | TREE_TYPE (arg_sg), arg_sg, | |
7002a1c8 | 10227 | build_int_cst (TREE_TYPE (arg_sg), sg)); |
e84da7c1 | 10228 | TREE_SIDE_EFFECTS (result_sg) = 1; |
10229 | /* Combine the signgam assignment with the lgamma result. */ | |
10230 | result = non_lvalue (fold_build2 (COMPOUND_EXPR, type, | |
10231 | result_sg, result_lg)); | |
10232 | } | |
10233 | } | |
10234 | } | |
10235 | ||
10236 | return result; | |
10237 | } | |
75a70cf9 | 10238 | |
c699fab8 | 10239 | /* If arguments ARG0 and ARG1 are a COMPLEX_CST, call the two-argument |
10240 | mpc function FUNC on it and return the resulting value as a tree | |
10241 | with type TYPE. The mpfr precision is set to the precision of | |
10242 | TYPE. We assume that function FUNC returns zero if the result | |
652d9409 | 10243 | could be calculated exactly within the requested precision. If |
10244 | DO_NONFINITE is true, then fold expressions containing Inf or NaN | |
10245 | in the arguments and/or results. */ | |
c699fab8 | 10246 | |
63e89698 | 10247 | tree |
652d9409 | 10248 | do_mpc_arg2 (tree arg0, tree arg1, tree type, int do_nonfinite, |
c699fab8 | 10249 | int (*func)(mpc_ptr, mpc_srcptr, mpc_srcptr, mpc_rnd_t)) |
10250 | { | |
10251 | tree result = NULL_TREE; | |
48e1416a | 10252 | |
c699fab8 | 10253 | STRIP_NOPS (arg0); |
10254 | STRIP_NOPS (arg1); | |
10255 | ||
10256 | /* To proceed, MPFR must exactly represent the target floating point | |
10257 | format, which only happens when the target base equals two. */ | |
10258 | if (TREE_CODE (arg0) == COMPLEX_CST && !TREE_OVERFLOW (arg0) | |
10259 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg0))) == REAL_TYPE | |
10260 | && TREE_CODE (arg1) == COMPLEX_CST && !TREE_OVERFLOW (arg1) | |
10261 | && TREE_CODE (TREE_TYPE (TREE_TYPE (arg1))) == REAL_TYPE | |
10262 | && REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (TREE_TYPE (arg0))))->b == 2) | |
10263 | { | |
10264 | const REAL_VALUE_TYPE *const re0 = TREE_REAL_CST_PTR (TREE_REALPART (arg0)); | |
10265 | const REAL_VALUE_TYPE *const im0 = TREE_REAL_CST_PTR (TREE_IMAGPART (arg0)); | |
10266 | const REAL_VALUE_TYPE *const re1 = TREE_REAL_CST_PTR (TREE_REALPART (arg1)); | |
10267 | const REAL_VALUE_TYPE *const im1 = TREE_REAL_CST_PTR (TREE_IMAGPART (arg1)); | |
10268 | ||
652d9409 | 10269 | if (do_nonfinite |
10270 | || (real_isfinite (re0) && real_isfinite (im0) | |
10271 | && real_isfinite (re1) && real_isfinite (im1))) | |
c699fab8 | 10272 | { |
10273 | const struct real_format *const fmt = | |
10274 | REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (type))); | |
10275 | const int prec = fmt->p; | |
10276 | const mp_rnd_t rnd = fmt->round_towards_zero ? GMP_RNDZ : GMP_RNDN; | |
10277 | const mpc_rnd_t crnd = fmt->round_towards_zero ? MPC_RNDZZ : MPC_RNDNN; | |
10278 | int inexact; | |
10279 | mpc_t m0, m1; | |
48e1416a | 10280 | |
c699fab8 | 10281 | mpc_init2 (m0, prec); |
10282 | mpc_init2 (m1, prec); | |
9af5ce0c | 10283 | mpfr_from_real (mpc_realref (m0), re0, rnd); |
10284 | mpfr_from_real (mpc_imagref (m0), im0, rnd); | |
10285 | mpfr_from_real (mpc_realref (m1), re1, rnd); | |
10286 | mpfr_from_real (mpc_imagref (m1), im1, rnd); | |
c699fab8 | 10287 | mpfr_clear_flags (); |
10288 | inexact = func (m0, m0, m1, crnd); | |
652d9409 | 10289 | result = do_mpc_ckconv (m0, type, inexact, do_nonfinite); |
c699fab8 | 10290 | mpc_clear (m0); |
10291 | mpc_clear (m1); | |
10292 | } | |
10293 | } | |
10294 | ||
10295 | return result; | |
10296 | } | |
239d491a | 10297 | |
75a70cf9 | 10298 | /* A wrapper function for builtin folding that prevents warnings for |
10299 | "statement without effect" and the like, caused by removing the | |
10300 | call node earlier than the warning is generated. */ | |
10301 | ||
10302 | tree | |
1a91d914 | 10303 | fold_call_stmt (gcall *stmt, bool ignore) |
75a70cf9 | 10304 | { |
10305 | tree ret = NULL_TREE; | |
10306 | tree fndecl = gimple_call_fndecl (stmt); | |
389dd41b | 10307 | location_t loc = gimple_location (stmt); |
75a70cf9 | 10308 | if (fndecl |
10309 | && TREE_CODE (fndecl) == FUNCTION_DECL | |
10310 | && DECL_BUILT_IN (fndecl) | |
10311 | && !gimple_call_va_arg_pack_p (stmt)) | |
10312 | { | |
10313 | int nargs = gimple_call_num_args (stmt); | |
9845fb99 | 10314 | tree *args = (nargs > 0 |
10315 | ? gimple_call_arg_ptr (stmt, 0) | |
10316 | : &error_mark_node); | |
75a70cf9 | 10317 | |
198622c0 | 10318 | if (avoid_folding_inline_builtin (fndecl)) |
10319 | return NULL_TREE; | |
75a70cf9 | 10320 | if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD) |
10321 | { | |
9845fb99 | 10322 | return targetm.fold_builtin (fndecl, nargs, args, ignore); |
75a70cf9 | 10323 | } |
10324 | else | |
10325 | { | |
9d884767 | 10326 | ret = fold_builtin_n (loc, fndecl, args, nargs, ignore); |
75a70cf9 | 10327 | if (ret) |
10328 | { | |
10329 | /* Propagate location information from original call to | |
10330 | expansion of builtin. Otherwise things like | |
10331 | maybe_emit_chk_warning, that operate on the expansion | |
10332 | of a builtin, will use the wrong location information. */ | |
10333 | if (gimple_has_location (stmt)) | |
10334 | { | |
10335 | tree realret = ret; | |
10336 | if (TREE_CODE (ret) == NOP_EXPR) | |
10337 | realret = TREE_OPERAND (ret, 0); | |
10338 | if (CAN_HAVE_LOCATION_P (realret) | |
10339 | && !EXPR_HAS_LOCATION (realret)) | |
389dd41b | 10340 | SET_EXPR_LOCATION (realret, loc); |
75a70cf9 | 10341 | return realret; |
10342 | } | |
10343 | return ret; | |
10344 | } | |
10345 | } | |
10346 | } | |
10347 | return NULL_TREE; | |
10348 | } | |
7bfefa9d | 10349 | |
b9a16870 | 10350 | /* Look up the function in builtin_decl that corresponds to DECL |
7bfefa9d | 10351 | and set ASMSPEC as its user assembler name. DECL must be a |
10352 | function decl that declares a builtin. */ | |
10353 | ||
10354 | void | |
10355 | set_builtin_user_assembler_name (tree decl, const char *asmspec) | |
10356 | { | |
7bfefa9d | 10357 | gcc_assert (TREE_CODE (decl) == FUNCTION_DECL |
10358 | && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL | |
10359 | && asmspec != 0); | |
10360 | ||
61ffc71a | 10361 | tree builtin = builtin_decl_explicit (DECL_FUNCTION_CODE (decl)); |
4d8e0d6d | 10362 | set_user_assembler_name (builtin, asmspec); |
61ffc71a | 10363 | |
10364 | if (DECL_FUNCTION_CODE (decl) == BUILT_IN_FFS | |
10365 | && INT_TYPE_SIZE < BITS_PER_WORD) | |
7bfefa9d | 10366 | { |
61ffc71a | 10367 | set_user_assembler_libfunc ("ffs", asmspec); |
10368 | set_optab_libfunc (ffs_optab, mode_for_size (INT_TYPE_SIZE, MODE_INT, 0), | |
10369 | "ffs"); | |
7bfefa9d | 10370 | } |
10371 | } | |
a6b74a67 | 10372 | |
10373 | /* Return true if DECL is a builtin that expands to a constant or similarly | |
10374 | simple code. */ | |
10375 | bool | |
10376 | is_simple_builtin (tree decl) | |
10377 | { | |
10378 | if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL) | |
10379 | switch (DECL_FUNCTION_CODE (decl)) | |
10380 | { | |
10381 | /* Builtins that expand to constants. */ | |
10382 | case BUILT_IN_CONSTANT_P: | |
10383 | case BUILT_IN_EXPECT: | |
10384 | case BUILT_IN_OBJECT_SIZE: | |
10385 | case BUILT_IN_UNREACHABLE: | |
10386 | /* Simple register moves or loads from stack. */ | |
fca0886c | 10387 | case BUILT_IN_ASSUME_ALIGNED: |
a6b74a67 | 10388 | case BUILT_IN_RETURN_ADDRESS: |
10389 | case BUILT_IN_EXTRACT_RETURN_ADDR: | |
10390 | case BUILT_IN_FROB_RETURN_ADDR: | |
10391 | case BUILT_IN_RETURN: | |
10392 | case BUILT_IN_AGGREGATE_INCOMING_ADDRESS: | |
10393 | case BUILT_IN_FRAME_ADDRESS: | |
10394 | case BUILT_IN_VA_END: | |
10395 | case BUILT_IN_STACK_SAVE: | |
10396 | case BUILT_IN_STACK_RESTORE: | |
10397 | /* Exception state returns or moves registers around. */ | |
10398 | case BUILT_IN_EH_FILTER: | |
10399 | case BUILT_IN_EH_POINTER: | |
10400 | case BUILT_IN_EH_COPY_VALUES: | |
10401 | return true; | |
10402 | ||
10403 | default: | |
10404 | return false; | |
10405 | } | |
10406 | ||
10407 | return false; | |
10408 | } | |
10409 | ||
10410 | /* Return true if DECL is a builtin that is not expensive, i.e., they are | |
10411 | most probably expanded inline into reasonably simple code. This is a | |
10412 | superset of is_simple_builtin. */ | |
10413 | bool | |
10414 | is_inexpensive_builtin (tree decl) | |
10415 | { | |
10416 | if (!decl) | |
10417 | return false; | |
10418 | else if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_MD) | |
10419 | return true; | |
10420 | else if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL) | |
10421 | switch (DECL_FUNCTION_CODE (decl)) | |
10422 | { | |
10423 | case BUILT_IN_ABS: | |
10424 | case BUILT_IN_ALLOCA: | |
581bf1c2 | 10425 | case BUILT_IN_ALLOCA_WITH_ALIGN: |
74bdbe96 | 10426 | case BUILT_IN_BSWAP16: |
a6b74a67 | 10427 | case BUILT_IN_BSWAP32: |
10428 | case BUILT_IN_BSWAP64: | |
10429 | case BUILT_IN_CLZ: | |
10430 | case BUILT_IN_CLZIMAX: | |
10431 | case BUILT_IN_CLZL: | |
10432 | case BUILT_IN_CLZLL: | |
10433 | case BUILT_IN_CTZ: | |
10434 | case BUILT_IN_CTZIMAX: | |
10435 | case BUILT_IN_CTZL: | |
10436 | case BUILT_IN_CTZLL: | |
10437 | case BUILT_IN_FFS: | |
10438 | case BUILT_IN_FFSIMAX: | |
10439 | case BUILT_IN_FFSL: | |
10440 | case BUILT_IN_FFSLL: | |
10441 | case BUILT_IN_IMAXABS: | |
10442 | case BUILT_IN_FINITE: | |
10443 | case BUILT_IN_FINITEF: | |
10444 | case BUILT_IN_FINITEL: | |
10445 | case BUILT_IN_FINITED32: | |
10446 | case BUILT_IN_FINITED64: | |
10447 | case BUILT_IN_FINITED128: | |
10448 | case BUILT_IN_FPCLASSIFY: | |
10449 | case BUILT_IN_ISFINITE: | |
10450 | case BUILT_IN_ISINF_SIGN: | |
10451 | case BUILT_IN_ISINF: | |
10452 | case BUILT_IN_ISINFF: | |
10453 | case BUILT_IN_ISINFL: | |
10454 | case BUILT_IN_ISINFD32: | |
10455 | case BUILT_IN_ISINFD64: | |
10456 | case BUILT_IN_ISINFD128: | |
10457 | case BUILT_IN_ISNAN: | |
10458 | case BUILT_IN_ISNANF: | |
10459 | case BUILT_IN_ISNANL: | |
10460 | case BUILT_IN_ISNAND32: | |
10461 | case BUILT_IN_ISNAND64: | |
10462 | case BUILT_IN_ISNAND128: | |
10463 | case BUILT_IN_ISNORMAL: | |
10464 | case BUILT_IN_ISGREATER: | |
10465 | case BUILT_IN_ISGREATEREQUAL: | |
10466 | case BUILT_IN_ISLESS: | |
10467 | case BUILT_IN_ISLESSEQUAL: | |
10468 | case BUILT_IN_ISLESSGREATER: | |
10469 | case BUILT_IN_ISUNORDERED: | |
10470 | case BUILT_IN_VA_ARG_PACK: | |
10471 | case BUILT_IN_VA_ARG_PACK_LEN: | |
10472 | case BUILT_IN_VA_COPY: | |
10473 | case BUILT_IN_TRAP: | |
10474 | case BUILT_IN_SAVEREGS: | |
10475 | case BUILT_IN_POPCOUNTL: | |
10476 | case BUILT_IN_POPCOUNTLL: | |
10477 | case BUILT_IN_POPCOUNTIMAX: | |
10478 | case BUILT_IN_POPCOUNT: | |
10479 | case BUILT_IN_PARITYL: | |
10480 | case BUILT_IN_PARITYLL: | |
10481 | case BUILT_IN_PARITYIMAX: | |
10482 | case BUILT_IN_PARITY: | |
10483 | case BUILT_IN_LABS: | |
10484 | case BUILT_IN_LLABS: | |
10485 | case BUILT_IN_PREFETCH: | |
ca4c3545 | 10486 | case BUILT_IN_ACC_ON_DEVICE: |
a6b74a67 | 10487 | return true; |
10488 | ||
10489 | default: | |
10490 | return is_simple_builtin (decl); | |
10491 | } | |
10492 | ||
10493 | return false; | |
10494 | } | |
507a998e | 10495 | |
10496 | /* Return true if T is a constant and the value cast to a target char | |
10497 | can be represented by a host char. | |
10498 | Store the casted char constant in *P if so. */ | |
10499 | ||
10500 | bool | |
10501 | target_char_cst_p (tree t, char *p) | |
10502 | { | |
10503 | if (!tree_fits_uhwi_p (t) || CHAR_TYPE_SIZE != HOST_BITS_PER_CHAR) | |
10504 | return false; | |
10505 | ||
10506 | *p = (char)tree_to_uhwi (t); | |
10507 | return true; | |
10508 | } |