| 1 | // RUN: %clang_cc1 -fsyntax-only -verify -Wconversion \ |
| 2 | // RUN: -nostdsysteminc -nobuiltininc -isystem %S/Inputs \ |
| 3 | // RUN: -triple x86_64-apple-darwin %s -Wno-unreachable-code |
| 4 | |
| 5 | #include <conversion.h> |
| 6 | |
| 7 | #define BIG 0x7f7f7f7f7f7f7f7fL |
| 8 | |
| 9 | void test0(char c, short s, int i, long l, long long ll) { |
| 10 | c = c; |
| 11 | c = s; // expected-warning {{implicit conversion loses integer precision}} |
| 12 | c = i; // expected-warning {{implicit conversion loses integer precision}} |
| 13 | c = l; // expected-warning {{implicit conversion loses integer precision}} |
| 14 | s = c; |
| 15 | s = s; |
| 16 | s = i; // expected-warning {{implicit conversion loses integer precision}} |
| 17 | s = l; // expected-warning {{implicit conversion loses integer precision}} |
| 18 | i = c; |
| 19 | i = s; |
| 20 | i = i; |
| 21 | i = l; // expected-warning {{implicit conversion loses integer precision}} |
| 22 | l = c; |
| 23 | l = s; |
| 24 | l = i; |
| 25 | l = l; |
| 26 | |
| 27 | c = (char) 0; |
| 28 | c = (short) 0; |
| 29 | c = (int) 0; |
| 30 | c = (long) 0; |
| 31 | s = (char) 0; |
| 32 | s = (short) 0; |
| 33 | s = (int) 0; |
| 34 | s = (long) 0; |
| 35 | i = (char) 0; |
| 36 | i = (short) 0; |
| 37 | i = (int) 0; |
| 38 | i = (long) 0; |
| 39 | l = (char) 0; |
| 40 | l = (short) 0; |
| 41 | l = (int) 0; |
| 42 | l = (long) 0; |
| 43 | |
| 44 | c = (char) BIG; |
| 45 | c = (short) BIG; // expected-warning {{implicit conversion from 'short' to 'char' changes value}} |
| 46 | c = (int) BIG; // expected-warning {{implicit conversion from 'int' to 'char' changes value}} |
| 47 | c = (long) BIG; // expected-warning {{implicit conversion from 'long' to 'char' changes value}} |
| 48 | s = (char) BIG; |
| 49 | s = (short) BIG; |
| 50 | s = (int) BIG; // expected-warning {{implicit conversion from 'int' to 'short' changes value}} |
| 51 | s = (long) BIG; // expected-warning {{implicit conversion from 'long' to 'short' changes value}} |
| 52 | i = (char) BIG; |
| 53 | i = (short) BIG; |
| 54 | i = (int) BIG; |
| 55 | i = (long) BIG; // expected-warning {{implicit conversion from 'long' to 'int' changes value}} |
| 56 | l = (char) BIG; |
| 57 | l = (short) BIG; |
| 58 | l = (int) BIG; |
| 59 | l = (long) BIG; |
| 60 | } |
| 61 | |
| 62 | char test1(long long ll) { |
| 63 | return (long long) ll; // expected-warning {{implicit conversion loses integer precision}} |
| 64 | } |
| 65 | char test1_a(long long ll) { |
| 66 | return (long) ll; // expected-warning {{implicit conversion loses integer precision}} |
| 67 | } |
| 68 | char test1_b(long long ll) { |
| 69 | return (int) ll; // expected-warning {{implicit conversion loses integer precision}} |
| 70 | } |
| 71 | char test1_c(long long ll) { |
| 72 | return (short) ll; // expected-warning {{implicit conversion loses integer precision}} |
| 73 | } |
| 74 | char test1_d(long long ll) { |
| 75 | return (char) ll; |
| 76 | } |
| 77 | char test1_e(long long ll) { |
| 78 | return (long long) BIG; // expected-warning {{implicit conversion from 'long long' to 'char' changes value}} |
| 79 | } |
| 80 | char test1_f(long long ll) { |
| 81 | return (long) BIG; // expected-warning {{implicit conversion from 'long' to 'char' changes value}} |
| 82 | } |
| 83 | char test1_g(long long ll) { |
| 84 | return (int) BIG; // expected-warning {{implicit conversion from 'int' to 'char' changes value}} |
| 85 | } |
| 86 | char test1_h(long long ll) { |
| 87 | return (short) BIG; // expected-warning {{implicit conversion from 'short' to 'char' changes value}} |
| 88 | } |
| 89 | char test1_i(long long ll) { |
| 90 | return (char) BIG; |
| 91 | } |
| 92 | |
| 93 | short test2(long long ll) { |
| 94 | return (long long) ll; // expected-warning {{implicit conversion loses integer precision}} |
| 95 | } |
| 96 | short test2_a(long long ll) { |
| 97 | return (long) ll; // expected-warning {{implicit conversion loses integer precision}} |
| 98 | } |
| 99 | short test2_b(long long ll) { |
| 100 | return (int) ll; // expected-warning {{implicit conversion loses integer precision}} |
| 101 | } |
| 102 | short test2_c(long long ll) { |
| 103 | return (short) ll; |
| 104 | } |
| 105 | short test2_d(long long ll) { |
| 106 | return (char) ll; |
| 107 | } |
| 108 | short test2_e(long long ll) { |
| 109 | return (long long) BIG; // expected-warning {{implicit conversion from 'long long' to 'short' changes value}} |
| 110 | } |
| 111 | short test2_f(long long ll) { |
| 112 | return (long) BIG; // expected-warning {{implicit conversion from 'long' to 'short' changes value}} |
| 113 | } |
| 114 | short test2_g(long long ll) { |
| 115 | return (int) BIG; // expected-warning {{implicit conversion from 'int' to 'short' changes value}} |
| 116 | } |
| 117 | short test2_h(long long ll) { |
| 118 | return (short) BIG; |
| 119 | } |
| 120 | short test2_i(long long ll) { |
| 121 | return (char) BIG; |
| 122 | } |
| 123 | |
| 124 | int test3(long long ll) { |
| 125 | return (long long) ll; // expected-warning {{implicit conversion loses integer precision}} |
| 126 | } |
| 127 | int test3_b(long long ll) { |
| 128 | return (long) ll; // expected-warning {{implicit conversion loses integer precision}} |
| 129 | } |
| 130 | int test3_c(long long ll) { |
| 131 | return (int) ll; |
| 132 | } |
| 133 | int test3_d(long long ll) { |
| 134 | return (short) ll; |
| 135 | } |
| 136 | int test3_e(long long ll) { |
| 137 | return (char) ll; |
| 138 | } |
| 139 | int test3_f(long long ll) { |
| 140 | return (long long) BIG; // expected-warning {{implicit conversion from 'long long' to 'int' changes value}} |
| 141 | } |
| 142 | int test3_g(long long ll) { |
| 143 | return (long) BIG; // expected-warning {{implicit conversion from 'long' to 'int' changes value}} |
| 144 | } |
| 145 | int test3_h(long long ll) { |
| 146 | return (int) BIG; |
| 147 | } |
| 148 | int test3_i(long long ll) { |
| 149 | return (short) BIG; |
| 150 | } |
| 151 | int test3_j(long long ll) { |
| 152 | return (char) BIG; |
| 153 | } |
| 154 | |
| 155 | long test4(long long ll) { |
| 156 | return (long long) ll; |
| 157 | } |
| 158 | long test4_a(long long ll) { |
| 159 | return (long) ll; |
| 160 | } |
| 161 | long test4_b(long long ll) { |
| 162 | return (int) ll; |
| 163 | } |
| 164 | long test4_c(long long ll) { |
| 165 | return (short) ll; |
| 166 | } |
| 167 | long test4_d(long long ll) { |
| 168 | return (char) ll; |
| 169 | } |
| 170 | long test4_e(long long ll) { |
| 171 | return (long long) BIG; |
| 172 | } |
| 173 | long test4_f(long long ll) { |
| 174 | return (long) BIG; |
| 175 | } |
| 176 | long test4_g(long long ll) { |
| 177 | return (int) BIG; |
| 178 | } |
| 179 | long test4_h(long long ll) { |
| 180 | return (short) BIG; |
| 181 | } |
| 182 | long test4_i(long long ll) { |
| 183 | return (char) BIG; |
| 184 | } |
| 185 | |
| 186 | long long test5(long long ll) { |
| 187 | return (long long) ll; |
| 188 | return (long) ll; |
| 189 | return (int) ll; |
| 190 | return (short) ll; |
| 191 | return (char) ll; |
| 192 | return (long long) BIG; |
| 193 | return (long) BIG; |
| 194 | return (int) BIG; |
| 195 | return (short) BIG; |
| 196 | return (char) BIG; |
| 197 | } |
| 198 | |
| 199 | void takes_char(char); |
| 200 | void takes_short(short); |
| 201 | void takes_int(int); |
| 202 | void takes_long(long); |
| 203 | void takes_longlong(long long); |
| 204 | void takes_float(float); |
| 205 | void takes_double(double); |
| 206 | void takes_longdouble(long double); |
| 207 | |
| 208 | void test6(char v) { |
| 209 | takes_char(v); |
| 210 | takes_short(v); |
| 211 | takes_int(v); |
| 212 | takes_long(v); |
| 213 | takes_longlong(v); |
| 214 | takes_float(v); |
| 215 | takes_double(v); |
| 216 | takes_longdouble(v); |
| 217 | } |
| 218 | |
| 219 | void test7(short v) { |
| 220 | takes_char(v); // expected-warning {{implicit conversion loses integer precision}} |
| 221 | takes_short(v); |
| 222 | takes_int(v); |
| 223 | takes_long(v); |
| 224 | takes_longlong(v); |
| 225 | takes_float(v); |
| 226 | takes_double(v); |
| 227 | takes_longdouble(v); |
| 228 | } |
| 229 | |
| 230 | void test8(int v) { |
| 231 | takes_char(v); // expected-warning {{implicit conversion loses integer precision}} |
| 232 | takes_short(v); // expected-warning {{implicit conversion loses integer precision}} |
| 233 | takes_int(v); |
| 234 | takes_long(v); |
| 235 | takes_longlong(v); |
| 236 | takes_float(v); |
| 237 | takes_double(v); |
| 238 | takes_longdouble(v); |
| 239 | } |
| 240 | |
| 241 | void test9(long v) { |
| 242 | takes_char(v); // expected-warning {{implicit conversion loses integer precision}} |
| 243 | takes_short(v); // expected-warning {{implicit conversion loses integer precision}} |
| 244 | takes_int(v); // expected-warning {{implicit conversion loses integer precision}} |
| 245 | takes_long(v); |
| 246 | takes_longlong(v); |
| 247 | takes_float(v); |
| 248 | takes_double(v); |
| 249 | takes_longdouble(v); |
| 250 | } |
| 251 | |
| 252 | void test10(long long v) { |
| 253 | takes_char(v); // expected-warning {{implicit conversion loses integer precision}} |
| 254 | takes_short(v); // expected-warning {{implicit conversion loses integer precision}} |
| 255 | takes_int(v); // expected-warning {{implicit conversion loses integer precision}} |
| 256 | takes_long(v); |
| 257 | takes_longlong(v); |
| 258 | takes_float(v); |
| 259 | takes_double(v); |
| 260 | takes_longdouble(v); |
| 261 | } |
| 262 | |
| 263 | void test11(float v) { |
| 264 | takes_char(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 265 | takes_short(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 266 | takes_int(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 267 | takes_long(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 268 | takes_longlong(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 269 | takes_float(v); |
| 270 | takes_double(v); |
| 271 | takes_longdouble(v); |
| 272 | } |
| 273 | |
| 274 | void test12(double v) { |
| 275 | takes_char(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 276 | takes_short(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 277 | takes_int(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 278 | takes_long(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 279 | takes_longlong(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 280 | takes_float(v); // expected-warning {{implicit conversion loses floating-point precision}} |
| 281 | takes_double(v); |
| 282 | takes_longdouble(v); |
| 283 | } |
| 284 | |
| 285 | void test13(long double v) { |
| 286 | takes_char(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 287 | takes_short(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 288 | takes_int(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 289 | takes_long(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 290 | takes_longlong(v); // expected-warning {{implicit conversion turns floating-point number into integer}} |
| 291 | takes_float(v); // expected-warning {{implicit conversion loses floating-point precision}} |
| 292 | takes_double(v); // expected-warning {{implicit conversion loses floating-point precision}} |
| 293 | takes_longdouble(v); |
| 294 | } |
| 295 | |
| 296 | void test14(long l) { |
| 297 | // Fine because of the boolean whitelist. |
| 298 | char c; |
| 299 | c = (l == 4); |
| 300 | c = ((l <= 4) && (l >= 0)); |
| 301 | c = ((l <= 4) && (l >= 0)) || (l > 20); |
| 302 | } |
| 303 | |
| 304 | void test15(char c) { |
| 305 | c = c + 1 + c * 2; |
| 306 | c = (short) c + 1 + c * 2; // expected-warning {{implicit conversion loses integer precision}} |
| 307 | } |
| 308 | |
| 309 | // PR 5422 |
| 310 | extern void *test16_external; |
| 311 | void test16(void) { |
| 312 | int a = (unsigned long) &test16_external; // expected-warning {{implicit conversion loses integer precision}} |
| 313 | } |
| 314 | |
| 315 | // PR 5938 |
| 316 | void test17() { |
| 317 | union { |
| 318 | unsigned long long a : 8; |
| 319 | unsigned long long b : 32; |
| 320 | unsigned long long c; |
| 321 | } U; |
| 322 | |
| 323 | unsigned int x; |
| 324 | x = U.a; |
| 325 | x = U.b; |
| 326 | x = U.c; // expected-warning {{implicit conversion loses integer precision}} |
| 327 | } |
| 328 | |
| 329 | // PR 5939 |
| 330 | void test18() { |
| 331 | union { |
| 332 | unsigned long long a : 1; |
| 333 | unsigned long long b; |
| 334 | } U; |
| 335 | |
| 336 | int x; |
| 337 | x = (U.a ? 0 : 1); |
| 338 | x = (U.b ? 0 : 1); |
| 339 | } |
| 340 | |
| 341 | // None of these should warn. |
| 342 | unsigned char test19(unsigned long u64) { |
| 343 | unsigned char x1 = u64 & 0xff; |
| 344 | unsigned char x2 = u64 >> 56; |
| 345 | |
| 346 | unsigned char mask = 0xee; |
| 347 | unsigned char x3 = u64 & mask; |
| 348 | return x1 + x2 + x3; |
| 349 | } |
| 350 | |
| 351 | // <rdar://problem/7631400> |
| 352 | void test_7631400(void) { |
| 353 | // This should show up despite the caret being inside a macro substitution |
| 354 | char s = LONG_MAX; // expected-warning {{implicit conversion from 'long' to 'char' changes value}} |
| 355 | } |
| 356 | |
| 357 | // <rdar://problem/7676608>: assertion for compound operators with non-integral RHS |
| 358 | void f7676608(int); |
| 359 | void test_7676608(void) { |
| 360 | float q = 0.7f; |
| 361 | char c = 5; |
| 362 | f7676608(c *= q); // expected-warning {{conversion}} |
| 363 | } |
| 364 | |
| 365 | // <rdar://problem/7904686> |
| 366 | void test_7904686(void) { |
| 367 | const int i = -1; |
| 368 | unsigned u1 = i; // expected-warning {{implicit conversion changes signedness}} |
| 369 | u1 = i; // expected-warning {{implicit conversion changes signedness}} |
| 370 | |
| 371 | unsigned u2 = -1; // expected-warning {{implicit conversion changes signedness}} |
| 372 | u2 = -1; // expected-warning {{implicit conversion changes signedness}} |
| 373 | } |
| 374 | |
| 375 | // <rdar://problem/8232669>: don't warn about conversions required by |
| 376 | // contexts in system headers |
| 377 | void test_8232669(void) { |
| 378 | unsigned bitset[20]; |
| 379 | SETBIT(bitset, 0); |
| 380 | |
| 381 | unsigned y = 50; |
| 382 | SETBIT(bitset, y); |
| 383 | |
| 384 | #define USER_SETBIT(set,bit) do { int i = bit; set[i/(8*sizeof(set[0]))] |= (1 << (i%(8*sizeof(set)))); } while(0) |
| 385 | USER_SETBIT(bitset, 0); // expected-warning 2 {{implicit conversion changes signedness}} |
| 386 | } |
| 387 | |
| 388 | // <rdar://problem/8559831> |
| 389 | enum E8559831a { E8559831a_val }; |
| 390 | enum E8559831b { E8559831b_val }; |
| 391 | typedef enum { E8559831c_val } E8559831c; |
| 392 | enum { E8559831d_val } value_d; |
| 393 | |
| 394 | void test_8559831_a(enum E8559831a value); |
| 395 | void test_8559831(enum E8559831b value_a, E8559831c value_c) { |
| 396 | test_8559831_a(value_a); // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}} |
| 397 | enum E8559831a a1 = value_a; // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}} |
| 398 | a1 = value_a; // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}} |
| 399 | |
| 400 | test_8559831_a(E8559831b_val); // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}} |
| 401 | enum E8559831a a1a = E8559831b_val; // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}} |
| 402 | a1 = E8559831b_val; // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}} |
| 403 | |
| 404 | test_8559831_a(value_c); // expected-warning{{implicit conversion from enumeration type 'E8559831c' to different enumeration type 'enum E8559831a'}} |
| 405 | enum E8559831a a2 = value_c; // expected-warning{{implicit conversion from enumeration type 'E8559831c' to different enumeration type 'enum E8559831a'}} |
| 406 | a2 = value_c; // expected-warning{{implicit conversion from enumeration type 'E8559831c' to different enumeration type 'enum E8559831a'}} |
| 407 | |
| 408 | test_8559831_a(value_d); |
| 409 | enum E8559831a a3 = value_d; |
| 410 | a3 = value_d; |
| 411 | } |
| 412 | |
| 413 | void test26(int si, long sl) { |
| 414 | si = sl % sl; // expected-warning {{implicit conversion loses integer precision: 'long' to 'int'}} |
| 415 | si = sl % si; |
| 416 | si = si % sl; |
| 417 | si = si / sl; |
| 418 | si = sl / si; // expected-warning {{implicit conversion loses integer precision: 'long' to 'int'}} |
| 419 | } |
| 420 | |
| 421 | // rdar://16502418 |
| 422 | typedef unsigned short uint16_t; |
| 423 | typedef unsigned int uint32_t; |
| 424 | typedef __attribute__ ((ext_vector_type(16),__aligned__(32))) uint16_t ushort16; |
| 425 | typedef __attribute__ ((ext_vector_type( 8),__aligned__( 32))) uint32_t uint8; |
| 426 | |
| 427 | void test27(ushort16 constants) { |
| 428 | uint8 pairedConstants = (uint8) constants; |
| 429 | ushort16 crCbScale = pairedConstants.s4; // expected-warning {{implicit conversion loses integer precision: 'uint32_t' (aka 'unsigned int') to 'ushort16'}} |
| 430 | ushort16 brBias = pairedConstants.s6; // expected-warning {{implicit conversion loses integer precision: 'uint32_t' (aka 'unsigned int') to 'ushort16'}} |
| 431 | } |
| 432 | |
| 433 | |
| 434 | float double2float_test1(double a) { |
| 435 | return a; // expected-warning {{implicit conversion loses floating-point precision: 'double' to 'float'}} |
| 436 | } |
| 437 | |
| 438 | void double2float_test2(double a, float *b) { |
| 439 | *b += a; // expected-warning {{implicit conversion when assigning computation result loses floating-point precision: 'double' to 'float'}} |
| 440 | } |
| 441 | |
| 442 | float sinf (float x); |
| 443 | double double2float_test3(double a) { |
| 444 | return sinf(a); // expected-warning {{implicit conversion loses floating-point precision: 'double' to 'float'}} |
| 445 | } |
| 446 | |
| 447 | float double2float_test4(double a, float b) { |
| 448 | b -= a; // expected-warning {{implicit conversion when assigning computation result loses floating-point precision: 'double' to 'float'}} |
| 449 | return b; |
| 450 | } |
| 451 | |