clang/test/OpenMP/master_taskloop_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 // Currently, we cannot use "0" for global register variables.
  22 // register int reg0 __asm__("0");
  23 int reg0;
  24
  25 int test_iteration_spaces() {
  26   const int N = 100;
  27   float a[N], b[N], c[N];
  28   int ii, jj, kk;
  29   float fii;
  30   double dii;
  31   register int reg; // expected-warning {{'register' storage class specifier is deprecated}}
  32 #pragma omp parallel
  33 #pragma omp master taskloop
  34   for (int i = 0; i < 10; i += 1) {
  35     c[i] = a[i] + b[i];
  36   }
  37 #pragma omp parallel
  38 #pragma omp master taskloop
  39   for (char i = 0; i < 10; i++) {
  40     c[i] = a[i] + b[i];
  41   }
  42 #pragma omp parallel
  43 #pragma omp master taskloop
  44   for (char i = 0; i < 10; i += '\1') {
  45     c[i] = a[i] + b[i];
  46   }
  47 #pragma omp parallel
  48 #pragma omp master taskloop
  49   for (long long i = 0; i < 10; i++) {
  50     c[i] = a[i] + b[i];
  51   }
  52 #pragma omp parallel
  53 // expected-error@+2 {{expression must have integral or unscoped enumeration type, not 'double'}}
  54 #pragma omp master taskloop
  55   for (long long i = 0; i < 10; i += 1.5) {
  56     c[i] = a[i] + b[i];
  57   }
  58 #pragma omp parallel
  59 #pragma omp master taskloop
  60   for (long long i = 0; i < 'z'; i += 1u) {
  61     c[i] = a[i] + b[i];
  62   }
  63 #pragma omp parallel
  64 // expected-error@+2 {{variable must be of integer or random access iterator type}}
  65 #pragma omp master taskloop
  66   for (float fi = 0; fi < 10.0; fi++) {
  67     c[(int)fi] = a[(int)fi] + b[(int)fi];
  68   }
  69 #pragma omp parallel
  70 // expected-error@+2 {{variable must be of integer or random access iterator type}}
  71 #pragma omp master taskloop
  72   for (double fi = 0; fi < 10.0; fi++) {
  73     c[(int)fi] = a[(int)fi] + b[(int)fi];
  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 master taskloop
  78   for (int &ref = ii; ref < 10; ref++) {
  79   }
  80 #pragma omp parallel
  81 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
  82 #pragma omp master taskloop
  83   for (int i; i < 10; i++)
  84     c[i] = a[i];
  85
  86 #pragma omp parallel
  87 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
  88 #pragma omp master taskloop
  89   for (int i = 0, j = 0; i < 10; ++i)
  90     c[i] = a[i];
  91
  92 #pragma omp parallel
  93 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
  94 #pragma omp master taskloop
  95   for (; ii < 10; ++ii)
  96     c[ii] = a[ii];
  97
  98 #pragma omp parallel
  99 // expected-warning@+3 {{expression result unused}}
 100 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 101 #pragma omp master taskloop
 102   for (ii + 1; ii < 10; ++ii)
 103     c[ii] = a[ii];
 104
 105 #pragma omp parallel
 106 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 107 #pragma omp master taskloop
 108   for (c[ii] = 0; ii < 10; ++ii)
 109     c[ii] = a[ii];
 110
 111 #pragma omp parallel
 112 // Ok to skip parenthesises.
 113 #pragma omp master taskloop
 114   for (((ii)) = 0; ii < 10; ++ii)
 115     c[ii] = a[ii];
 116
 117 #pragma omp parallel
 118 // 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'}}
 119 #pragma omp master taskloop
 120   for (int i = 0; i; i++)
 121     c[i] = a[i];
 122
 123 #pragma omp parallel
 124 // 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'}}
 125 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'i'}}
 126 #pragma omp master taskloop
 127   for (int i = 0; jj < kk; ii++)
 128     c[i] = a[i];
 129
 130 #pragma omp parallel
 131 // 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'}}
 132 #pragma omp master taskloop
 133   for (int i = 0; !!i; i++)
 134     c[i] = a[i];
 135
 136 // Ok
 137 #pragma omp parallel
 138 // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}}
 139 #pragma omp master taskloop
 140   for (int i = 0; i != 1; i++)
 141     c[i] = a[i];
 142
 143 #pragma omp parallel
 144 // 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'}}
 145 #pragma omp master taskloop
 146   for (int i = 0;; i++)
 147     c[i] = a[i];
 148
 149 #pragma omp parallel
 150 // Ok.
 151 #pragma omp master taskloop
 152   for (int i = 11; i > 10; i--)
 153     c[i] = a[i];
 154
 155 #pragma omp parallel
 156 // Ok.
 157 #pragma omp master taskloop
 158   for (int i = 0; i < 10; ++i)
 159     c[i] = a[i];
 160
 161 #pragma omp parallel
 162 // Ok.
 163 #pragma omp master taskloop
 164   for (ii = 0; ii < 10; ++ii)
 165     c[ii] = a[ii];
 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 master taskloop
 170   for (ii = 0; ii < 10; ++jj)
 171     c[ii] = a[jj];
 172
 173 #pragma omp parallel
 174 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 175 #pragma omp master taskloop
 176   for (ii = 0; ii < 10; ++++ii)
 177     c[ii] = a[ii];
 178
 179 #pragma omp parallel
 180 // Ok but undefined behavior (in general, cannot check that incr
 181 // is really loop-invariant).
 182 #pragma omp master taskloop
 183   for (ii = 0; ii < 10; ii = ii + ii)
 184     c[ii] = a[ii];
 185
 186 #pragma omp parallel
 187 // expected-error@+2 {{expression must have integral or unscoped enumeration type, not 'float'}}
 188 #pragma omp master taskloop
 189   for (ii = 0; ii < 10; ii = ii + 1.0f)
 190     c[ii] = a[ii];
 191
 192 #pragma omp parallel
 193 // Ok - step was converted to integer type.
 194 #pragma omp master taskloop
 195   for (ii = 0; ii < 10; ii = ii + (int)1.1f)
 196     c[ii] = a[ii];
 197
 198 #pragma omp parallel
 199 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 200 #pragma omp master taskloop
 201   for (ii = 0; ii < 10; jj = ii + 2)
 202     c[ii] = a[ii];
 203
 204 #pragma omp parallel
 205 // expected-warning@+3 {{relational comparison result unused}}
 206 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 207 #pragma omp master taskloop
 208   for (ii = 0; ii<10; jj> kk + 2)
 209     c[ii] = a[ii];
 210
 211 #pragma omp parallel
 212 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 213 #pragma omp master taskloop
 214   for (ii = 0; ii < 10;)
 215     c[ii] = a[ii];
 216
 217 #pragma omp parallel
 218 // expected-warning@+3 {{expression result unused}}
 219 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 220 #pragma omp master taskloop
 221   for (ii = 0; ii < 10; !ii)
 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 master taskloop
 227   for (ii = 0; ii < 10; ii ? ++ii : ++jj)
 228     c[ii] = a[ii];
 229
 230 #pragma omp parallel
 231 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 232 #pragma omp master taskloop
 233   for (ii = 0; ii < 10; ii = ii < 10)
 234     c[ii] = a[ii];
 235
 236 #pragma omp parallel
 237 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 238 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 239 #pragma omp master taskloop
 240   for (ii = 0; ii < 10; ii = ii + 0)
 241     c[ii] = a[ii];
 242
 243 #pragma omp parallel
 244 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 245 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 246 #pragma omp master taskloop
 247   for (ii = 0; ii < 10; ii = ii + (int)(0.8 - 0.45))
 248     c[ii] = a[ii];
 249
 250 #pragma omp parallel
 251 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 252 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 253 #pragma omp master taskloop
 254   for (ii = 0; (ii) < 10; ii -= 25)
 255     c[ii] = a[ii];
 256
 257 #pragma omp parallel
 258 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 259 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 260 #pragma omp master taskloop
 261   for (ii = 0; (ii < 10); ii -= 0)
 262     c[ii] = a[ii];
 263
 264 #pragma omp parallel
 265 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 266 // expected-error@+2 {{increment expression must cause 'ii' to decrease on each iteration of OpenMP for loop}}
 267 #pragma omp master taskloop
 268   for (ii = 0; ii > 10; (ii += 0))
 269     c[ii] = a[ii];
 270
 271 #pragma omp parallel
 272 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 273 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 274 #pragma omp master taskloop
 275   for (ii = 0; ii < 10; (ii) = (1 - 1) + (ii))
 276     c[ii] = a[ii];
 277
 278 #pragma omp parallel
 279 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 280 // expected-error@+2 {{increment expression must cause 'ii' to decrease on each iteration of OpenMP for loop}}
 281 #pragma omp master taskloop
 282   for ((ii = 0); ii > 10; (ii -= 0))
 283     c[ii] = a[ii];
 284
 285 #pragma omp parallel
 286 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 287 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 288 #pragma omp master taskloop
 289   for (ii = 0; (ii < 10); (ii -= 0))
 290     c[ii] = a[ii];
 291
 292 #pragma omp parallel
 293 // expected-note@+2  {{defined as firstprivate}}
 294 // expected-error@+2 {{loop iteration variable in the associated loop of 'omp master taskloop' directive may not be firstprivate, predetermined as private}}
 295 #pragma omp master taskloop firstprivate(ii)
 296   for (ii = 0; ii < 10; ii++)
 297     c[ii] = a[ii];
 298
 299 #pragma omp parallel
 300 // expected-error@+1 {{unexpected OpenMP clause 'linear' in directive '#pragma omp master taskloop'}}
 301 #pragma omp master taskloop linear(ii)
 302   for (ii = 0; ii < 10; ii++)
 303     c[ii] = a[ii];
 304
 305 #pragma omp parallel
 306 #pragma omp master taskloop private(ii)
 307   for (ii = 0; ii < 10; ii++)
 308     c[ii] = a[ii];
 309
 310 #pragma omp parallel
 311 #pragma omp master taskloop lastprivate(ii)
 312   for (ii = 0; ii < 10; ii++)
 313     c[ii] = a[ii];
 314
 315 #pragma omp parallel
 316   {
 317 // expected-error@+2 {{loop iteration variable in the associated loop of 'omp master taskloop' directive may not be threadprivate or thread local, predetermined as private}}
 318 #pragma omp master taskloop
 319     for (sii = 0; sii < 10; sii += 1)
 320       c[sii] = a[sii];
 321   }
 322
 323 #pragma omp parallel
 324   {
 325 #pragma omp master taskloop
 326     for (reg0 = 0; reg0 < 10; reg0 += 1)
 327       c[reg0] = a[reg0];
 328   }
 329
 330 #pragma omp parallel
 331   {
 332 #pragma omp master taskloop
 333     for (reg = 0; reg < 10; reg += 1)
 334       c[reg] = a[reg];
 335   }
 336
 337 #pragma omp parallel
 338   {
 339 #pragma omp master taskloop
 340     for (globalii = 0; globalii < 10; globalii += 1)
 341       c[globalii] = a[globalii];
 342   }
 343
 344 #pragma omp parallel
 345   {
 346 #pragma omp master taskloop collapse(2)
 347     for (ii = 0; ii < 10; ii += 1)
 348     for (globalii = 0; globalii < 10; globalii += 1)
 349       c[globalii] += a[globalii] + ii;
 350   }
 351
 352 #pragma omp parallel
 353 // omp4-error@+2 {{statement after '#pragma omp master taskloop' must be a for loop}}
 354 #pragma omp master taskloop
 355   for (auto &item : a) {
 356     item = item + 1;
 357   }
 358
 359 #pragma omp parallel
 360 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 361 // expected-error@+2 {{increment expression must cause 'i' to increase on each iteration of OpenMP for loop}}
 362 #pragma omp master taskloop
 363   for (unsigned i = 9; i < 10; i--) {
 364     c[i] = a[i] + b[i];
 365   }
 366
 367   int(*lb)[4] = nullptr;
 368 #pragma omp parallel
 369 #pragma omp master taskloop
 370   for (int(*p)[4] = lb; p < lb + 8; ++p) {
 371   }
 372
 373 #pragma omp parallel
 374 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 375 #pragma omp master taskloop
 376   for (int a{0}; a < 10; ++a) {
 377   }
 378
 379   return 0;
 380 }
 381
 382 // Iterators allowed in openmp for-loops.
 383 namespace std {
 384 struct random_access_iterator_tag {};
 385 template <class Iter>
 386 struct iterator_traits {
 387   typedef typename Iter::difference_type difference_type;
 388   typedef typename Iter::iterator_category iterator_category;
 389 };
 390 template <class Iter>
 391 typename iterator_traits<Iter>::difference_type
 392 distance(Iter first, Iter last) { return first - last; }
 393 }
 394 class Iter0 {
 395 public:
 396   Iter0() {}
 397   Iter0(const Iter0 &) {}
 398   Iter0 operator++() { return *this; }
 399   Iter0 operator--() { return *this; }
 400   bool operator<(Iter0 a) { return true; }
 401 };
 402 // expected-note@+2 {{candidate function not viable: no known conversion from 'GoodIter' to 'Iter0' for 1st argument}}
 403 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'Iter0' for 1st argument}}
 404 int operator-(Iter0 a, Iter0 b) { return 0; }
 405 class Iter1 {
 406 public:
 407   Iter1(float f = 0.0f, double d = 0.0) {}
 408   Iter1(const Iter1 &) {}
 409   Iter1 operator++() { return *this; }
 410   Iter1 operator--() { return *this; }
 411   bool operator<(Iter1 a) { return true; }
 412   bool operator>=(Iter1 a) { return false; }
 413 };
 414 class GoodIter {
 415 public:
 416   GoodIter() {}
 417   GoodIter(const GoodIter &) {}
 418   GoodIter(int fst, int snd) {}
 419   GoodIter &operator=(const GoodIter &that) { return *this; }
 420   GoodIter &operator=(const Iter0 &that) { return *this; }
 421   GoodIter &operator+=(int x) { return *this; }
 422   GoodIter &operator-=(int x) { return *this; }
 423   explicit GoodIter(void *) {}
 424   GoodIter operator++() { return *this; }
 425   GoodIter operator--() { return *this; }
 426   bool operator!() { return true; }
 427   bool operator<(GoodIter a) { return true; }
 428   bool operator<=(GoodIter a) { return true; }
 429   bool operator>=(GoodIter a) { return false; }
 430   typedef int difference_type;
 431   typedef std::random_access_iterator_tag iterator_category;
 432 };
 433 // expected-note@+2 {{candidate function not viable: no known conversion from 'const Iter0' to 'GoodIter' for 2nd argument}}
 434 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'GoodIter' for 1st argument}}
 435 int operator-(GoodIter a, GoodIter b) { return 0; }
 436 // expected-note@+1 3 {{candidate function not viable: requires single argument 'a', but 2 arguments were provided}}
 437 GoodIter operator-(GoodIter a) { return a; }
 438 // expected-note@+2 {{candidate function not viable: no known conversion from 'const Iter0' to 'int' for 2nd argument}}
 439 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'GoodIter' for 1st argument}}
 440 GoodIter operator-(GoodIter a, int v) { return GoodIter(); }
 441 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter0' to 'GoodIter' for 1st argument}}
 442 GoodIter operator+(GoodIter a, int v) { return GoodIter(); }
 443 // expected-note@+2 {{candidate function not viable: no known conversion from 'GoodIter' to 'int' for 1st argument}}
 444 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'int' for 1st argument}}
 445 GoodIter operator-(int v, GoodIter a) { return GoodIter(); }
 446 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter0' to 'int' for 1st argument}}
 447 GoodIter operator+(int v, GoodIter a) { return GoodIter(); }
 448
 449 int test_with_random_access_iterator() {
 450   GoodIter begin, end;
 451   Iter0 begin0, end0;
 452 #pragma omp parallel
 453 #pragma omp master taskloop
 454   for (GoodIter I = begin; I < end; ++I)
 455     ++I;
 456 #pragma omp parallel
 457 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 458 #pragma omp master taskloop
 459   for (GoodIter &I = begin; I < end; ++I)
 460     ++I;
 461 #pragma omp parallel
 462 #pragma omp master taskloop
 463   for (GoodIter I = begin; I >= end; --I)
 464     ++I;
 465 #pragma omp parallel
 466 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 467 #pragma omp master taskloop
 468   for (GoodIter I(begin); I < end; ++I)
 469     ++I;
 470 #pragma omp parallel
 471 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 472 #pragma omp master taskloop
 473   for (GoodIter I(nullptr); I < end; ++I)
 474     ++I;
 475 #pragma omp parallel
 476 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 477 #pragma omp master taskloop
 478   for (GoodIter I(0); I < end; ++I)
 479     ++I;
 480 #pragma omp parallel
 481 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 482 #pragma omp master taskloop
 483   for (GoodIter I(1, 2); I < end; ++I)
 484     ++I;
 485 #pragma omp parallel
 486 #pragma omp master taskloop
 487   for (begin = GoodIter(0); begin < end; ++begin)
 488     ++begin;
 489 // expected-error@+4 {{invalid operands to binary expression ('GoodIter' and 'const Iter0')}}
 490 // expected-error@+3 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
 491 #pragma omp parallel
 492 #pragma omp master taskloop
 493   for (begin = begin0; begin < end; ++begin)
 494     ++begin;
 495 #pragma omp parallel
 496 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 497 #pragma omp master taskloop
 498   for (++begin; begin < end; ++begin)
 499     ++begin;
 500 #pragma omp parallel
 501 #pragma omp master taskloop
 502   for (begin = end; begin < end; ++begin)
 503     ++begin;
 504 #pragma omp parallel
 505 // 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'}}
 506 #pragma omp master taskloop
 507   for (GoodIter I = begin; I - I; ++I)
 508     ++I;
 509 #pragma omp parallel
 510 // 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'}}
 511 #pragma omp master taskloop
 512   for (GoodIter I = begin; begin < end; ++I)
 513     ++I;
 514 #pragma omp parallel
 515 // 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'}}
 516 #pragma omp master taskloop
 517   for (GoodIter I = begin; !I; ++I)
 518     ++I;
 519 #pragma omp parallel
 520 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 521 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 522 #pragma omp master taskloop
 523   for (GoodIter I = begin; I >= end; I = I + 1)
 524     ++I;
 525 #pragma omp parallel
 526 #pragma omp master taskloop
 527   for (GoodIter I = begin; I >= end; I = I - 1)
 528     ++I;
 529 #pragma omp parallel
 530 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'I'}}
 531 #pragma omp master taskloop
 532   for (GoodIter I = begin; I >= end; I = -I)
 533     ++I;
 534 #pragma omp parallel
 535 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 536 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 537 #pragma omp master taskloop
 538   for (GoodIter I = begin; I >= end; I = 2 + I)
 539     ++I;
 540 #pragma omp parallel
 541 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'I'}}
 542 #pragma omp master taskloop
 543   for (GoodIter I = begin; I >= end; I = 2 - I)
 544     ++I;
 545 // In the following example, we cannot update the loop variable using '+='
 546 // expected-error@+3 {{invalid operands to binary expression ('Iter0' and 'int')}}
 547 #pragma omp parallel
 548 #pragma omp master taskloop
 549   for (Iter0 I = begin0; I < end0; ++I)
 550     ++I;
 551 #pragma omp parallel
 552 // Initializer is constructor without params.
 553 // expected-error@+3 {{invalid operands to binary expression ('Iter0' and 'int')}}
 554 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 555 #pragma omp master taskloop
 556   for (Iter0 I; I < end0; ++I)
 557     ++I;
 558   Iter1 begin1, end1;
 559 // expected-error@+4 {{invalid operands to binary expression ('Iter1' and 'Iter1')}}
 560 // expected-error@+3 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
 561 #pragma omp parallel
 562 #pragma omp master taskloop
 563   for (Iter1 I = begin1; I < end1; ++I)
 564     ++I;
 565 #pragma omp parallel
 566 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 567 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 568 #pragma omp master taskloop
 569   for (Iter1 I = begin1; I >= end1; ++I)
 570     ++I;
 571 #pragma omp parallel
 572 // expected-error@+5 {{invalid operands to binary expression ('Iter1' and 'float')}}
 573 // expected-error@+4 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
 574 // Initializer is constructor with all default params.
 575 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 576 #pragma omp master taskloop
 577   for (Iter1 I; I < end1; ++I) {
 578   }
 579   return 0;
 580 }
 581
 582 template <typename IT, int ST>
 583 class TC {
 584 public:
 585   int dotest_lt(IT begin, IT end) {
 586 #pragma omp parallel
 587 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 588 // expected-error@+2 {{increment expression must cause 'I' to increase on each iteration of OpenMP for loop}}
 589 #pragma omp master taskloop
 590     for (IT I = begin; I < end; I = I + ST) {
 591       ++I;
 592     }
 593 #pragma omp parallel
 594 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 595 // expected-error@+2 {{increment expression must cause 'I' to increase on each iteration of OpenMP for loop}}
 596 #pragma omp master taskloop
 597     for (IT I = begin; I <= end; I += ST) {
 598       ++I;
 599     }
 600 #pragma omp parallel
 601 #pragma omp master taskloop
 602     for (IT I = begin; I < end; ++I) {
 603       ++I;
 604     }
 605   }
 606
 607   static IT step() {
 608     return IT(ST);
 609   }
 610 };
 611 template <typename IT, int ST = 0>
 612 int dotest_gt(IT begin, IT end) {
 613 #pragma omp parallel
 614 // expected-note@+3 2 {{loop step is expected to be negative due to this condition}}
 615 // expected-error@+2 2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 616 #pragma omp master taskloop
 617   for (IT I = begin; I >= end; I = I + ST) {
 618     ++I;
 619   }
 620 #pragma omp parallel
 621 // expected-note@+3 2 {{loop step is expected to be negative due to this condition}}
 622 // expected-error@+2 2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 623 #pragma omp master taskloop
 624   for (IT I = begin; I >= end; I += ST) {
 625     ++I;
 626   }
 627
 628 #pragma omp parallel
 629 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 630 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 631 #pragma omp master taskloop
 632   for (IT I = begin; I >= end; ++I) {
 633     ++I;
 634   }
 635
 636 #pragma omp parallel
 637 #pragma omp master taskloop
 638   for (IT I = begin; I < end; I += TC<int, ST>::step()) {
 639     ++I;
 640   }
 641 }
 642
 643 void test_with_template() {
 644   GoodIter begin, end;
 645   TC<GoodIter, 100> t1;
 646   TC<GoodIter, -100> t2;
 647   t1.dotest_lt(begin, end);
 648   t2.dotest_lt(begin, end);         // expected-note {{in instantiation of member function 'TC<GoodIter, -100>::dotest_lt' requested here}}
 649   dotest_gt(begin, end);            // expected-note {{in instantiation of function template specialization 'dotest_gt<GoodIter, 0>' requested here}}
 650   dotest_gt<unsigned, 10>(0, 100);  // expected-note {{in instantiation of function template specialization 'dotest_gt<unsigned int, 10>' requested here}}
 651 }
 652
 653 void test_loop_break() {
 654   const int N = 100;
 655   float a[N], b[N], c[N];
 656 #pragma omp parallel
 657 #pragma omp master taskloop
 658   for (int i = 0; i < 10; i++) {
 659     c[i] = a[i] + b[i];
 660     for (int j = 0; j < 10; ++j) {
 661       if (a[i] > b[j])
 662         break; // OK in nested loop
 663     }
 664     switch (i) {
 665     case 1:
 666       b[i]++;
 667       break;
 668     default:
 669       break;
 670     }
 671     if (c[i] > 10)
 672       break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
 673
 674     if (c[i] > 11)
 675       break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
 676   }
 677
 678 #pragma omp parallel
 679 #pragma omp master taskloop
 680   for (int i = 0; i < 10; i++) {
 681     for (int j = 0; j < 10; j++) {
 682       c[i] = a[i] + b[i];
 683       if (c[i] > 10) {
 684         if (c[i] < 20) {
 685           break; // OK
 686         }
 687       }
 688     }
 689   }
 690 }
 691
 692 void test_loop_eh() {
 693   const int N = 100;
 694   float a[N], b[N], c[N];
 695 #pragma omp parallel
 696 #pragma omp master taskloop
 697   for (int i = 0; i < 10; i++) {
 698     c[i] = a[i] + b[i];
 699     try {
 700       for (int j = 0; j < 10; ++j) {
 701         if (a[i] > b[j])
 702           throw a[i];
 703       }
 704       throw a[i];
 705     } catch (float f) {
 706       if (f > 0.1)
 707         throw a[i];
 708       return; // expected-error {{cannot return from OpenMP region}}
 709     }
 710     switch (i) {
 711     case 1:
 712       b[i]++;
 713       break;
 714     default:
 715       break;
 716     }
 717     for (int j = 0; j < 10; j++) {
 718       if (c[i] > 10)
 719         throw c[i];
 720     }
 721   }
 722   if (c[9] > 10)
 723     throw c[9]; // OK
 724
 725 #pragma omp parallel
 726 #pragma omp master taskloop
 727   for (int i = 0; i < 10; ++i) {
 728     struct S {
 729       void g() { throw 0; }
 730     };
 731   }
 732 }
 733
 734 void test_loop_firstprivate_lastprivate() {
 735   S s(4);
 736 #pragma omp parallel
 737 #pragma omp master taskloop lastprivate(s) firstprivate(s)
 738   for (int i = 0; i < 16; ++i)
 739     ;
 740 }
 741