clang/test/OpenMP/for_simd_loop_messages.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -fopenmp -fopenmp-version=45 -x c++ -std=c++11 -fexceptions -fcxx-exceptions -verify=expected,omp4 %s -Wuninitialized
   2 // RUN: %clang_cc1 -fsyntax-only -fopenmp -x c++ -std=c++11 -fexceptions -fcxx-exceptions -verify=expected,omp5 %s -Wuninitialized
   3
   4 // RUN: %clang_cc1 -fsyntax-only -fopenmp-simd -fopenmp-version=45 -x c++ -std=c++11 -fexceptions -fcxx-exceptions -verify=expected,omp4 %s -Wuninitialized
   5 // RUN: %clang_cc1 -fsyntax-only -fopenmp-simd -x c++ -std=c++11 -fexceptions -fcxx-exceptions -verify=expected,omp5 %s -Wuninitialized
   6
   7 class S {
   8   int a;
   9   S() : a(0) {}
  10
  11 public:
  12   S(int v) : a(v) {}
  13   S(const S &s) : a(s.a) {}
  14 };
  15
  16 static int sii;
  17 // expected-note@+1 {{defined as threadprivate or thread local}}
  18 #pragma omp threadprivate(sii)
  19 static int globalii;
  20
  21 int test_iteration_spaces() {
  22   const int N = 100;
  23   float a[N], b[N], c[N];
  24   int ii, jj, kk;
  25   float fii;
  26   double dii;
  27 #pragma omp parallel
  28 #pragma omp for simd
  29   for (int i = 0; i < 10; i += 1) {
  30     c[i] = a[i] + b[i];
  31   }
  32 #pragma omp parallel
  33 #pragma omp for simd
  34   for (char i = 0; i < 10; i++) {
  35     c[i] = a[i] + b[i];
  36   }
  37 #pragma omp parallel
  38 #pragma omp for simd
  39   for (char i = 0; i < 10; i += '\1') {
  40     c[i] = a[i] + b[i];
  41   }
  42 #pragma omp parallel
  43 #pragma omp for simd
  44   for (long long i = 0; i < 10; i++) {
  45     c[i] = a[i] + b[i];
  46   }
  47 #pragma omp parallel
  48 // expected-error@+2 {{expression must have integral or unscoped enumeration type, not 'double'}}
  49 #pragma omp for simd
  50   for (long long i = 0; i < 10; i += 1.5) {
  51     c[i] = a[i] + b[i];
  52   }
  53 #pragma omp parallel
  54 #pragma omp for simd
  55   for (long long i = 0; i < 'z'; i += 1u) {
  56     c[i] = a[i] + b[i];
  57   }
  58 #pragma omp parallel
  59 // expected-error@+2 {{variable must be of integer or random access iterator type}}
  60 #pragma omp for simd
  61   for (float fi = 0; fi < 10.0; fi++) {
  62     c[(int)fi] = a[(int)fi] + b[(int)fi];
  63   }
  64 #pragma omp parallel
  65 // expected-error@+2 {{variable must be of integer or random access iterator type}}
  66 #pragma omp for simd
  67   for (double fi = 0; fi < 10.0; fi++) {
  68     c[(int)fi] = a[(int)fi] + b[(int)fi];
  69   }
  70 #pragma omp parallel
  71 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
  72 #pragma omp for simd
  73   for (int &ref = ii; ref < 10; ref++) {
  74   }
  75 #pragma omp parallel
  76 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
  77 #pragma omp for simd
  78   for (int i; i < 10; i++)
  79     c[i] = a[i];
  80
  81 #pragma omp parallel
  82 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
  83 #pragma omp for simd
  84   for (int i = 0, j = 0; i < 10; ++i)
  85     c[i] = a[i];
  86
  87 #pragma omp parallel
  88 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
  89 #pragma omp for simd
  90   for (; ii < 10; ++ii)
  91     c[ii] = a[ii];
  92
  93 #pragma omp parallel
  94 // expected-warning@+3 {{expression result unused}}
  95 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
  96 #pragma omp for simd
  97   for (ii + 1; ii < 10; ++ii)
  98     c[ii] = a[ii];
  99
 100 #pragma omp parallel
 101 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 102 #pragma omp for simd
 103   for (c[ii] = 0; ii < 10; ++ii)
 104     c[ii] = a[ii];
 105
 106 #pragma omp parallel
 107 // Ok to skip parenthesises.
 108 #pragma omp for simd
 109   for (((ii)) = 0; ii < 10; ++ii)
 110     c[ii] = a[ii];
 111
 112 #pragma omp parallel
 113 // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'i'}}
 114 #pragma omp for simd
 115   for (int i = 0; i; i++)
 116     c[i] = a[i];
 117
 118 #pragma omp parallel
 119 // omp4-error@+3 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}} omp5-error@+3 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'i'}}
 120 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'i'}}
 121 #pragma omp for simd
 122   for (int i = 0; jj < kk; ii++)
 123     c[i] = a[i];
 124
 125 #pragma omp parallel
 126 // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'i'}}
 127 #pragma omp for simd
 128   for (int i = 0; !!i; i++)
 129     c[i] = a[i];
 130
 131 #pragma omp parallel
 132 // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}}
 133 #pragma omp for simd
 134   for (int i = 0; i != 1; i++)
 135     c[i] = a[i];
 136
 137 #pragma omp parallel
 138 // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'i'}}
 139 #pragma omp for simd
 140   for (int i = 0;; i++)
 141     c[i] = a[i];
 142
 143 #pragma omp parallel
 144 // Ok.
 145 #pragma omp for simd
 146   for (int i = 11; i > 10; i--)
 147     c[i] = a[i];
 148
 149 #pragma omp parallel
 150 // Ok.
 151 #pragma omp for simd
 152   for (int i = 0; i < 10; ++i)
 153     c[i] = a[i];
 154
 155 #pragma omp parallel
 156 // Ok.
 157 #pragma omp for simd
 158   for (ii = 0; ii < 10; ++ii)
 159     c[ii] = a[ii];
 160
 161 #pragma omp parallel
 162 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 163 #pragma omp for simd
 164   for (ii = 0; ii < 10; ++jj)
 165     c[ii] = a[jj];
 166
 167 #pragma omp parallel
 168 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 169 #pragma omp for simd
 170   for (ii = 0; ii < 10; ++++ii)
 171     c[ii] = a[ii];
 172
 173 #pragma omp parallel
 174 // Ok but undefined behavior (in general, cannot check that incr
 175 // is really loop-invariant).
 176 #pragma omp for simd
 177   for (ii = 0; ii < 10; ii = ii + ii)
 178     c[ii] = a[ii];
 179
 180 #pragma omp parallel
 181 // expected-error@+2 {{expression must have integral or unscoped enumeration type, not 'float'}}
 182 #pragma omp for simd
 183   for (ii = 0; ii < 10; ii = ii + 1.0f)
 184     c[ii] = a[ii];
 185
 186 #pragma omp parallel
 187 // Ok - step was converted to integer type.
 188 #pragma omp for simd
 189   for (ii = 0; ii < 10; ii = ii + (int)1.1f)
 190     c[ii] = a[ii];
 191
 192 #pragma omp parallel
 193 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 194 #pragma omp for simd
 195   for (ii = 0; ii < 10; jj = ii + 2)
 196     c[ii] = a[ii];
 197
 198 #pragma omp parallel
 199 // expected-warning@+3 {{relational comparison result unused}}
 200 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 201 #pragma omp for simd
 202   for (ii = 0; ii<10; jj> kk + 2)
 203     c[ii] = a[ii];
 204
 205 #pragma omp parallel
 206 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 207 #pragma omp for simd
 208   for (ii = 0; ii < 10;)
 209     c[ii] = a[ii];
 210
 211 #pragma omp parallel
 212 // expected-warning@+3 {{expression result unused}}
 213 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 214 #pragma omp for simd
 215   for (ii = 0; ii < 10; !ii)
 216     c[ii] = a[ii];
 217
 218 #pragma omp parallel
 219 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 220 #pragma omp for simd
 221   for (ii = 0; ii < 10; ii ? ++ii : ++jj)
 222     c[ii] = a[ii];
 223
 224 #pragma omp parallel
 225 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 226 #pragma omp for simd
 227   for (ii = 0; ii < 10; ii = ii < 10)
 228     c[ii] = a[ii];
 229
 230 #pragma omp parallel
 231 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 232 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 233 #pragma omp for simd
 234   for (ii = 0; ii < 10; ii = ii + 0)
 235     c[ii] = a[ii];
 236
 237 #pragma omp parallel
 238 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 239 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 240 #pragma omp for simd
 241   for (ii = 0; ii < 10; ii = ii + (int)(0.8 - 0.45))
 242     c[ii] = a[ii];
 243
 244 #pragma omp parallel
 245 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 246 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 247 #pragma omp for simd
 248   for (ii = 0; (ii) < 10; ii -= 25)
 249     c[ii] = a[ii];
 250
 251 #pragma omp parallel
 252 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 253 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 254 #pragma omp for simd
 255   for (ii = 0; (ii < 10); ii -= 0)
 256     c[ii] = a[ii];
 257
 258 #pragma omp parallel
 259 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 260 // expected-error@+2 {{increment expression must cause 'ii' to decrease on each iteration of OpenMP for loop}}
 261 #pragma omp for simd
 262   for (ii = 0; ii > 10; (ii += 0))
 263     c[ii] = a[ii];
 264
 265 #pragma omp parallel
 266 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 267 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 268 #pragma omp for simd
 269   for (ii = 0; ii < 10; (ii) = (1 - 1) + (ii))
 270     c[ii] = a[ii];
 271
 272 #pragma omp parallel
 273 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 274 // expected-error@+2 {{increment expression must cause 'ii' to decrease on each iteration of OpenMP for loop}}
 275 #pragma omp for simd
 276   for ((ii = 0); ii > 10; (ii -= 0))
 277     c[ii] = a[ii];
 278
 279 #pragma omp parallel
 280 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 281 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 282 #pragma omp for simd
 283   for (ii = 0; (ii < 10); (ii -= 0))
 284     c[ii] = a[ii];
 285
 286 #pragma omp parallel
 287 // expected-note@+2  {{defined as firstprivate}}
 288 // expected-error@+2 {{loop iteration variable in the associated loop of 'omp for simd' directive may not be firstprivate, predetermined as linear}}
 289 #pragma omp for simd firstprivate(ii)
 290   for (ii = 0; ii < 10; ii++)
 291     c[ii] = a[ii];
 292
 293 #pragma omp parallel
 294 #pragma omp for simd linear(ii)
 295   for (ii = 0; ii < 10; ii++)
 296     c[ii] = a[ii];
 297
 298 #pragma omp parallel
 299 // omp4-note@+2  {{defined as private}}
 300 // omp4-error@+2 {{loop iteration variable in the associated loop of 'omp for simd' directive may not be private, predetermined as linear}}
 301 #pragma omp for simd private(ii)
 302   for (ii = 0; ii < 10; ii++)
 303     c[ii] = a[ii];
 304
 305 #pragma omp parallel
 306 // omp4-note@+2  {{defined as lastprivate}}
 307 // omp4-error@+2 {{loop iteration variable in the associated loop of 'omp for simd' directive may not be lastprivate, predetermined as linear}}
 308 #pragma omp for simd lastprivate(ii)
 309   for (ii = 0; ii < 10; ii++)
 310     c[ii] = a[ii];
 311
 312 #pragma omp parallel
 313   {
 314 // expected-error@+2 {{loop iteration variable in the associated loop of 'omp for simd' directive may not be threadprivate or thread local, predetermined as linear}}
 315 #pragma omp for simd
 316     for (sii = 0; sii < 10; sii += 1)
 317       c[sii] = a[sii];
 318   }
 319
 320 #pragma omp parallel
 321   {
 322 #pragma omp for simd
 323     for (globalii = 0; globalii < 10; globalii += 1)
 324       c[globalii] = a[globalii];
 325   }
 326
 327 #pragma omp parallel
 328   {
 329 #pragma omp for simd collapse(2)
 330     for (ii = 0; ii < 10; ii += 1)
 331     for (globalii = 0; globalii < 10; globalii += 1)
 332       c[globalii] += a[globalii] + ii;
 333   }
 334
 335 #pragma omp parallel
 336 // omp4-error@+2 {{statement after '#pragma omp for simd' must be a for loop}}
 337 #pragma omp for simd
 338   for (auto &item : a) {
 339     item = item + 1;
 340   }
 341
 342 #pragma omp parallel
 343 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 344 // expected-error@+2 {{increment expression must cause 'i' to increase on each iteration of OpenMP for loop}}
 345 #pragma omp for simd
 346   for (unsigned i = 9; i < 10; i--) {
 347     c[i] = a[i] + b[i];
 348   }
 349
 350   int(*lb)[4] = nullptr;
 351 #pragma omp parallel
 352 #pragma omp for simd
 353   for (int(*p)[4] = lb; p < lb + 8; ++p) {
 354   }
 355
 356 #pragma omp parallel
 357 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 358 #pragma omp for simd
 359   for (int a{0}; a < 10; ++a) {
 360   }
 361
 362   return 0;
 363 }
 364
 365 // Iterators allowed in openmp for-loops.
 366 namespace std {
 367 struct random_access_iterator_tag {};
 368 template <class Iter>
 369 struct iterator_traits {
 370   typedef typename Iter::difference_type difference_type;
 371   typedef typename Iter::iterator_category iterator_category;
 372 };
 373 template <class Iter>
 374 typename iterator_traits<Iter>::difference_type
 375 distance(Iter first, Iter last) { return first - last; }
 376 }
 377 class Iter0 {
 378 public:
 379   Iter0() {}
 380   Iter0(const Iter0 &) {}
 381   Iter0 operator++() { return *this; }
 382   Iter0 operator--() { return *this; }
 383   bool operator<(Iter0 a) { return true; }
 384 };
 385 // expected-note@+2 {{candidate function not viable: no known conversion from 'GoodIter' to 'Iter0' for 1st argument}}
 386 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'Iter0' for 1st argument}}
 387 int operator-(Iter0 a, Iter0 b) { return 0; }
 388 class Iter1 {
 389 public:
 390   Iter1(float f = 0.0f, double d = 0.0) {}
 391   Iter1(const Iter1 &) {}
 392   Iter1 operator++() { return *this; }
 393   Iter1 operator--() { return *this; }
 394   bool operator<(Iter1 a) { return true; }
 395   bool operator>=(Iter1 a) { return false; }
 396 };
 397 class GoodIter {
 398 public:
 399   GoodIter() {}
 400   GoodIter(const GoodIter &) {}
 401   GoodIter(int fst, int snd) {}
 402   GoodIter &operator=(const GoodIter &that) { return *this; }
 403   GoodIter &operator=(const Iter0 &that) { return *this; }
 404   GoodIter &operator+=(int x) { return *this; }
 405   explicit GoodIter(void *) {}
 406   GoodIter operator++() { return *this; }
 407   GoodIter operator--() { return *this; }
 408   bool operator!() { return true; }
 409   bool operator<(GoodIter a) { return true; }
 410   bool operator<=(GoodIter a) { return true; }
 411   bool operator>=(GoodIter a) { return false; }
 412   typedef int difference_type;
 413   typedef std::random_access_iterator_tag iterator_category;
 414 };
 415 // expected-note@+2 {{candidate function not viable: no known conversion from 'const Iter0' to 'GoodIter' for 2nd argument}}
 416 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'GoodIter' for 1st argument}}
 417 int operator-(GoodIter a, GoodIter b) { return 0; }
 418 // expected-note@+1 3 {{candidate function not viable: requires single argument 'a', but 2 arguments were provided}}
 419 GoodIter operator-(GoodIter a) { return a; }
 420 // expected-note@+2 {{candidate function not viable: no known conversion from 'const Iter0' to 'int' for 2nd argument}}
 421 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'GoodIter' for 1st argument}}
 422 GoodIter operator-(GoodIter a, int v) { return GoodIter(); }
 423 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter0' to 'GoodIter' for 1st argument}}
 424 GoodIter operator+(GoodIter a, int v) { return GoodIter(); }
 425 // expected-note@+2 {{candidate function not viable: no known conversion from 'GoodIter' to 'int' for 1st argument}}
 426 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'int' for 1st argument}}
 427 GoodIter operator-(int v, GoodIter a) { return GoodIter(); }
 428 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter0' to 'int' for 1st argument}}
 429 GoodIter operator+(int v, GoodIter a) { return GoodIter(); }
 430
 431 int test_with_random_access_iterator() {
 432   GoodIter begin, end;
 433   Iter0 begin0, end0;
 434 #pragma omp parallel
 435 #pragma omp for simd
 436   for (GoodIter I = begin; I < end; ++I)
 437     ++I;
 438 #pragma omp parallel
 439 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 440 #pragma omp for simd
 441   for (GoodIter &I = begin; I < end; ++I)
 442     ++I;
 443 #pragma omp parallel
 444 #pragma omp for simd
 445   for (GoodIter I = begin; I >= end; --I)
 446     ++I;
 447 #pragma omp parallel
 448 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 449 #pragma omp for simd
 450   for (GoodIter I(begin); I < end; ++I)
 451     ++I;
 452 #pragma omp parallel
 453 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 454 #pragma omp for simd
 455   for (GoodIter I(nullptr); I < end; ++I)
 456     ++I;
 457 #pragma omp parallel
 458 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 459 #pragma omp for simd
 460   for (GoodIter I(0); I < end; ++I)
 461     ++I;
 462 #pragma omp parallel
 463 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 464 #pragma omp for simd
 465   for (GoodIter I(1, 2); I < end; ++I)
 466     ++I;
 467 #pragma omp parallel
 468 #pragma omp for simd
 469   for (begin = GoodIter(0); begin < end; ++begin)
 470     ++begin;
 471 #pragma omp parallel
 472 // expected-error@+3 {{invalid operands to binary expression ('GoodIter' and 'const Iter0')}}
 473 // expected-error@+2 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
 474 #pragma omp for simd
 475   for (begin = begin0; begin < end; ++begin)
 476     ++begin;
 477 #pragma omp parallel
 478 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 479 #pragma omp for simd
 480   for (++begin; begin < end; ++begin)
 481     ++begin;
 482 #pragma omp parallel
 483 #pragma omp for simd
 484   for (begin = end; begin < end; ++begin)
 485     ++begin;
 486 #pragma omp parallel
 487 // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'I'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'I'}}
 488 #pragma omp for simd
 489   for (GoodIter I = begin; I - I; ++I)
 490     ++I;
 491 #pragma omp parallel
 492 // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'I'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'I'}}
 493 #pragma omp for simd
 494   for (GoodIter I = begin; begin < end; ++I)
 495     ++I;
 496 #pragma omp parallel
 497 // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'I'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'I'}}
 498 #pragma omp for simd
 499   for (GoodIter I = begin; !I; ++I)
 500     ++I;
 501 #pragma omp parallel
 502 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 503 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 504 #pragma omp for simd
 505   for (GoodIter I = begin; I >= end; I = I + 1)
 506     ++I;
 507 #pragma omp parallel
 508 #pragma omp for simd
 509   for (GoodIter I = begin; I >= end; I = I - 1)
 510     ++I;
 511 #pragma omp parallel
 512 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'I'}}
 513 #pragma omp for simd
 514   for (GoodIter I = begin; I >= end; I = -I)
 515     ++I;
 516 #pragma omp parallel
 517 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 518 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 519 #pragma omp for simd
 520   for (GoodIter I = begin; I >= end; I = 2 + I)
 521     ++I;
 522 #pragma omp parallel
 523 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'I'}}
 524 #pragma omp for simd
 525   for (GoodIter I = begin; I >= end; I = 2 - I)
 526     ++I;
 527 #pragma omp parallel
 528 // expected-error@+2 {{invalid operands to binary expression ('Iter0' and 'int')}}
 529 #pragma omp for simd
 530   for (Iter0 I = begin0; I < end0; ++I)
 531     ++I;
 532 #pragma omp parallel
 533 // Initializer is constructor without params.
 534 // expected-error@+3 {{invalid operands to binary expression ('Iter0' and 'int')}}
 535 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 536 #pragma omp for simd
 537   for (Iter0 I; I < end0; ++I)
 538     ++I;
 539   Iter1 begin1, end1;
 540 #pragma omp parallel
 541 // expected-error@+3 {{invalid operands to binary expression ('Iter1' and 'Iter1')}}
 542 // expected-error@+2 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
 543 #pragma omp for simd
 544   for (Iter1 I = begin1; I < end1; ++I)
 545     ++I;
 546 #pragma omp parallel
 547 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 548 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 549 #pragma omp for simd
 550   for (Iter1 I = begin1; I >= end1; ++I)
 551     ++I;
 552 #pragma omp parallel
 553 // expected-error@+5 {{invalid operands to binary expression ('Iter1' and 'float')}}
 554 // expected-error@+4 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
 555 // Initializer is constructor with all default params.
 556 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 557 #pragma omp for simd
 558   for (Iter1 I; I < end1; ++I) {
 559   }
 560   return 0;
 561 }
 562
 563 template <typename IT, int ST>
 564 class TC {
 565 public:
 566   int dotest_lt(IT begin, IT end) {
 567 #pragma omp parallel
 568 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 569 // expected-error@+2 {{increment expression must cause 'I' to increase on each iteration of OpenMP for loop}}
 570 #pragma omp for simd
 571     for (IT I = begin; I < end; I = I + ST) {
 572       ++I;
 573     }
 574 #pragma omp parallel
 575 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 576 // expected-error@+2 {{increment expression must cause 'I' to increase on each iteration of OpenMP for loop}}
 577 #pragma omp for simd
 578     for (IT I = begin; I <= end; I += ST) {
 579       ++I;
 580     }
 581 #pragma omp parallel
 582 #pragma omp for simd
 583     for (IT I = begin; I < end; ++I) {
 584       ++I;
 585     }
 586   }
 587
 588   static IT step() {
 589     return IT(ST);
 590   }
 591 };
 592 template <typename IT, int ST = 0>
 593 int dotest_gt(IT begin, IT end) {
 594 #pragma omp parallel
 595 // expected-note@+3 2 {{loop step is expected to be negative due to this condition}}
 596 // expected-error@+2 2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 597 #pragma omp for simd
 598   for (IT I = begin; I >= end; I = I + ST) {
 599     ++I;
 600   }
 601 #pragma omp parallel
 602 // expected-note@+3 2 {{loop step is expected to be negative due to this condition}}
 603 // expected-error@+2 2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 604 #pragma omp for simd
 605   for (IT I = begin; I >= end; I += ST) {
 606     ++I;
 607   }
 608
 609 #pragma omp parallel
 610 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 611 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 612 #pragma omp for simd
 613   for (IT I = begin; I >= end; ++I) {
 614     ++I;
 615   }
 616
 617 #pragma omp parallel
 618 #pragma omp for simd
 619   for (IT I = begin; I < end; I += TC<int, ST>::step()) {
 620     ++I;
 621   }
 622 }
 623
 624 void test_with_template() {
 625   GoodIter begin, end;
 626   TC<GoodIter, 100> t1;
 627   TC<GoodIter, -100> t2;
 628   t1.dotest_lt(begin, end);
 629   t2.dotest_lt(begin, end);         // expected-note {{in instantiation of member function 'TC<GoodIter, -100>::dotest_lt' requested here}}
 630   dotest_gt(begin, end);            // expected-note {{in instantiation of function template specialization 'dotest_gt<GoodIter, 0>' requested here}}
 631   dotest_gt<unsigned, 10>(0, 100);  // expected-note {{in instantiation of function template specialization 'dotest_gt<unsigned int, 10>' requested here}}
 632 }
 633
 634 void test_loop_break() {
 635   const int N = 100;
 636   float a[N], b[N], c[N];
 637 #pragma omp parallel
 638 #pragma omp for simd
 639   for (int i = 0; i < 10; i++) {
 640     c[i] = a[i] + b[i];
 641     for (int j = 0; j < 10; ++j) {
 642       if (a[i] > b[j])
 643         break; // OK in nested loop
 644     }
 645     switch (i) {
 646     case 1:
 647       b[i]++;
 648       break;
 649     default:
 650       break;
 651     }
 652     if (c[i] > 10)
 653       break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
 654
 655     if (c[i] > 11)
 656       break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
 657   }
 658
 659 #pragma omp parallel
 660 #pragma omp for simd
 661   for (int i = 0; i < 10; i++) {
 662     for (int j = 0; j < 10; j++) {
 663       c[i] = a[i] + b[i];
 664       if (c[i] > 10) {
 665         if (c[i] < 20) {
 666           break; // OK
 667         }
 668       }
 669     }
 670   }
 671 }
 672
 673 void test_loop_eh() {
 674   const int N = 100;
 675   float a[N], b[N], c[N];
 676 #pragma omp parallel
 677 #pragma omp for simd
 678   for (int i = 0; i < 10; i++) {
 679     c[i] = a[i] + b[i];
 680     try { // expected-error {{'try' statement cannot be used in OpenMP simd region}}
 681       for (int j = 0; j < 10; ++j) {
 682         if (a[i] > b[j])
 683           throw a[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
 684       }
 685       throw a[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
 686     }
 687     catch (float f) {
 688       if (f > 0.1)
 689         throw a[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
 690       return; // expected-error {{cannot return from OpenMP region}}
 691     }
 692     switch (i) {
 693     case 1:
 694       b[i]++;
 695       break;
 696     default:
 697       break;
 698     }
 699     for (int j = 0; j < 10; j++) {
 700       if (c[i] > 10)
 701         throw c[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
 702     }
 703   }
 704   if (c[9] > 10)
 705     throw c[9]; // OK
 706
 707 #pragma omp parallel
 708 #pragma omp for simd
 709   for (int i = 0; i < 10; ++i) {
 710     struct S {
 711       void g() { throw 0; }
 712     };
 713   }
 714 }
 715
 716 void test_loop_firstprivate_lastprivate() {
 717   S s(4);
 718 #pragma omp parallel
 719 #pragma omp for simd lastprivate(s) firstprivate(s)
 720   for (int i = 0; i < 16; ++i)
 721     ;
 722 }
 723
 724 void test_ordered() {
 725 #pragma omp parallel
 726 #pragma omp for simd ordered ordered // expected-error {{directive '#pragma omp for simd' cannot contain more than one 'ordered' clause}}
 727   for (int i = 0; i < 16; ++i)
 728     ;
 729 #pragma omp parallel
 730 #pragma omp for simd ordered
 731   for (int i = 0; i < 16; ++i)
 732     ;
 733 #pragma omp parallel
 734 // expected-error@+1 {{'ordered' clause with a parameter can not be specified in '#pragma omp for simd' directive}}
 735 #pragma omp for simd ordered(1)
 736   for (int i = 0; i < 16; ++i)
 737     ;
 738 }
 739
 740 void test_nowait() {
 741 #pragma omp parallel
 742 #pragma omp for simd nowait nowait // expected-error {{directive '#pragma omp for simd' cannot contain more than one 'nowait' clause}}
 743   for (int i = 0; i < 16; ++i)
 744     ;
 745 }