clang/test/OpenMP/master_taskloop_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 // 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 simd
  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 simd
  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 simd
  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 simd
  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 simd
  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 simd
  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 simd
  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 simd
  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 simd
  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 simd
  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 simd
  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 simd
  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 simd
 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 simd
 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 simd
 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 simd
 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 simd
 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 simd
 133   for (int i = 0; !!i; i++)
 134     c[i] = a[i];
 135
 136 #pragma omp parallel
 137 // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}}
 138 #pragma omp master taskloop simd
 139   for (int i = 0; i != 1; i++)
 140     c[i] = a[i];
 141
 142 #pragma omp parallel
 143 // 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'}}
 144 #pragma omp master taskloop simd
 145   for (int i = 0;; i++)
 146     c[i] = a[i];
 147
 148 #pragma omp parallel
 149 // Ok.
 150 #pragma omp master taskloop simd
 151   for (int i = 11; i > 10; i--)
 152     c[i] = a[i];
 153
 154 #pragma omp parallel
 155 // Ok.
 156 #pragma omp master taskloop simd
 157   for (int i = 0; i < 10; ++i)
 158     c[i] = a[i];
 159
 160 #pragma omp parallel
 161 // Ok.
 162 #pragma omp master taskloop simd
 163   for (ii = 0; ii < 10; ++ii)
 164     c[ii] = a[ii];
 165
 166 #pragma omp parallel
 167 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 168 #pragma omp master taskloop simd
 169   for (ii = 0; ii < 10; ++jj)
 170     c[ii] = a[jj];
 171
 172 #pragma omp parallel
 173 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 174 #pragma omp master taskloop simd
 175   for (ii = 0; ii < 10; ++++ii)
 176     c[ii] = a[ii];
 177
 178 #pragma omp parallel
 179 // Ok but undefined behavior (in general, cannot check that incr
 180 // is really loop-invariant).
 181 #pragma omp master taskloop simd
 182   for (ii = 0; ii < 10; ii = ii + ii)
 183     c[ii] = a[ii];
 184
 185 #pragma omp parallel
 186 // expected-error@+2 {{expression must have integral or unscoped enumeration type, not 'float'}}
 187 #pragma omp master taskloop simd
 188   for (ii = 0; ii < 10; ii = ii + 1.0f)
 189     c[ii] = a[ii];
 190
 191 #pragma omp parallel
 192 // Ok - step was converted to integer type.
 193 #pragma omp master taskloop simd
 194   for (ii = 0; ii < 10; ii = ii + (int)1.1f)
 195     c[ii] = a[ii];
 196
 197 #pragma omp parallel
 198 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 199 #pragma omp master taskloop simd
 200   for (ii = 0; ii < 10; jj = ii + 2)
 201     c[ii] = a[ii];
 202
 203 #pragma omp parallel
 204 // expected-warning@+3 {{relational comparison result unused}}
 205 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 206 #pragma omp master taskloop simd
 207   for (ii = 0; ii<10; jj> kk + 2)
 208     c[ii] = a[ii];
 209
 210 #pragma omp parallel
 211 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 212 #pragma omp master taskloop simd
 213   for (ii = 0; ii < 10;)
 214     c[ii] = a[ii];
 215
 216 #pragma omp parallel
 217 // expected-warning@+3 {{expression result unused}}
 218 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 219 #pragma omp master taskloop simd
 220   for (ii = 0; ii < 10; !ii)
 221     c[ii] = a[ii];
 222
 223 #pragma omp parallel
 224 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 225 #pragma omp master taskloop simd
 226   for (ii = 0; ii < 10; ii ? ++ii : ++jj)
 227     c[ii] = a[ii];
 228
 229 #pragma omp parallel
 230 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
 231 #pragma omp master taskloop simd
 232   for (ii = 0; ii < 10; ii = ii < 10)
 233     c[ii] = a[ii];
 234
 235 #pragma omp parallel
 236 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 237 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 238 #pragma omp master taskloop simd
 239   for (ii = 0; ii < 10; ii = ii + 0)
 240     c[ii] = a[ii];
 241
 242 #pragma omp parallel
 243 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 244 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 245 #pragma omp master taskloop simd
 246   for (ii = 0; ii < 10; ii = ii + (int)(0.8 - 0.45))
 247     c[ii] = a[ii];
 248
 249 #pragma omp parallel
 250 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 251 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 252 #pragma omp master taskloop simd
 253   for (ii = 0; (ii) < 10; ii -= 25)
 254     c[ii] = a[ii];
 255
 256 #pragma omp parallel
 257 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 258 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 259 #pragma omp master taskloop simd
 260   for (ii = 0; (ii < 10); ii -= 0)
 261     c[ii] = a[ii];
 262
 263 #pragma omp parallel
 264 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 265 // expected-error@+2 {{increment expression must cause 'ii' to decrease on each iteration of OpenMP for loop}}
 266 #pragma omp master taskloop simd
 267   for (ii = 0; ii > 10; (ii += 0))
 268     c[ii] = a[ii];
 269
 270 #pragma omp parallel
 271 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 272 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 273 #pragma omp master taskloop simd
 274   for (ii = 0; ii < 10; (ii) = (1 - 1) + (ii))
 275     c[ii] = a[ii];
 276
 277 #pragma omp parallel
 278 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 279 // expected-error@+2 {{increment expression must cause 'ii' to decrease on each iteration of OpenMP for loop}}
 280 #pragma omp master taskloop simd
 281   for ((ii = 0); ii > 10; (ii -= 0))
 282     c[ii] = a[ii];
 283
 284 #pragma omp parallel
 285 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 286 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
 287 #pragma omp master taskloop simd
 288   for (ii = 0; (ii < 10); (ii -= 0))
 289     c[ii] = a[ii];
 290
 291 #pragma omp parallel
 292 // expected-note@+2  {{defined as firstprivate}}
 293 // expected-error@+2 {{loop iteration variable in the associated loop of 'omp master taskloop simd' directive may not be firstprivate, predetermined as linear}}
 294 #pragma omp master taskloop simd firstprivate(ii)
 295   for (ii = 0; ii < 10; ii++)
 296     c[ii] = a[ii];
 297
 298 #pragma omp parallel
 299 #pragma omp master taskloop simd linear(ii)
 300   for (ii = 0; ii < 10; ii++)
 301     c[ii] = a[ii];
 302
 303 // omp4-note@+3 {{defined as private}}
 304 // omp4-error@+3 {{loop iteration variable in the associated loop of 'omp master taskloop simd' directive may not be private, predetermined as linear}}
 305 #pragma omp parallel
 306 #pragma omp master taskloop simd private(ii)
 307   for (ii = 0; ii < 10; ii++)
 308     c[ii] = a[ii];
 309
 310 // omp4-note@+3 {{defined as lastprivate}}
 311 // omp4-error@+3 {{loop iteration variable in the associated loop of 'omp master taskloop simd' directive may not be lastprivate, predetermined as linear}}
 312 #pragma omp parallel
 313 #pragma omp master taskloop simd lastprivate(ii)
 314   for (ii = 0; ii < 10; ii++)
 315     c[ii] = a[ii];
 316
 317 #pragma omp parallel
 318   {
 319 // expected-error@+2 {{loop iteration variable in the associated loop of 'omp master taskloop simd' directive may not be threadprivate or thread local, predetermined as linear}}
 320 #pragma omp master taskloop simd
 321     for (sii = 0; sii < 10; sii += 1)
 322       c[sii] = a[sii];
 323   }
 324
 325 #pragma omp parallel
 326   {
 327 #pragma omp master taskloop simd
 328     for (reg0 = 0; reg0 < 10; reg0 += 1)
 329       c[reg0] = a[reg0];
 330   }
 331
 332 #pragma omp parallel
 333   {
 334 #pragma omp master taskloop simd
 335     for (reg = 0; reg < 10; reg += 1)
 336       c[reg] = a[reg];
 337   }
 338
 339 #pragma omp parallel
 340   {
 341 #pragma omp master taskloop simd
 342     for (globalii = 0; globalii < 10; globalii += 1)
 343       c[globalii] = a[globalii];
 344   }
 345
 346 #pragma omp parallel
 347   {
 348 #pragma omp master taskloop simd collapse(2)
 349     for (ii = 0; ii < 10; ii += 1)
 350     for (globalii = 0; globalii < 10; globalii += 1)
 351       c[globalii] += a[globalii] + ii;
 352   }
 353
 354 #pragma omp parallel
 355 // omp4-error@+2 {{statement after '#pragma omp master taskloop simd' must be a for loop}}
 356 #pragma omp master taskloop simd
 357   for (auto &item : a) {
 358     item = item + 1;
 359   }
 360
 361 #pragma omp parallel
 362 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 363 // expected-error@+2 {{increment expression must cause 'i' to increase on each iteration of OpenMP for loop}}
 364 #pragma omp master taskloop simd
 365   for (unsigned i = 9; i < 10; i--) {
 366     c[i] = a[i] + b[i];
 367   }
 368
 369   int(*lb)[4] = nullptr;
 370 #pragma omp parallel
 371 #pragma omp master taskloop simd
 372   for (int(*p)[4] = lb; p < lb + 8; ++p) {
 373   }
 374
 375 #pragma omp parallel
 376 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 377 #pragma omp master taskloop simd
 378   for (int a{0}; a < 10; ++a) {
 379   }
 380
 381   return 0;
 382 }
 383
 384 // Iterators allowed in openmp for-loops.
 385 namespace std {
 386 struct random_access_iterator_tag {};
 387 template <class Iter>
 388 struct iterator_traits {
 389   typedef typename Iter::difference_type difference_type;
 390   typedef typename Iter::iterator_category iterator_category;
 391 };
 392 template <class Iter>
 393 typename iterator_traits<Iter>::difference_type
 394 distance(Iter first, Iter last) { return first - last; }
 395 }
 396 class Iter0 {
 397 public:
 398   Iter0() {}
 399   Iter0(const Iter0 &) {}
 400   Iter0 operator++() { return *this; }
 401   Iter0 operator--() { return *this; }
 402   bool operator<(Iter0 a) { return true; }
 403 };
 404 // expected-note@+2 {{candidate function not viable: no known conversion from 'GoodIter' to 'Iter0' for 1st argument}}
 405 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'Iter0' for 1st argument}}
 406 int operator-(Iter0 a, Iter0 b) { return 0; }
 407 class Iter1 {
 408 public:
 409   Iter1(float f = 0.0f, double d = 0.0) {}
 410   Iter1(const Iter1 &) {}
 411   Iter1 operator++() { return *this; }
 412   Iter1 operator--() { return *this; }
 413   bool operator<(Iter1 a) { return true; }
 414   bool operator>=(Iter1 a) { return false; }
 415 };
 416 class GoodIter {
 417 public:
 418   GoodIter() {}
 419   GoodIter(const GoodIter &) {}
 420   GoodIter(int fst, int snd) {}
 421   GoodIter &operator=(const GoodIter &that) { return *this; }
 422   GoodIter &operator=(const Iter0 &that) { return *this; }
 423   GoodIter &operator+=(int x) { return *this; }
 424   GoodIter &operator-=(int x) { return *this; }
 425   explicit GoodIter(void *) {}
 426   GoodIter operator++() { return *this; }
 427   GoodIter operator--() { return *this; }
 428   bool operator!() { return true; }
 429   bool operator<(GoodIter a) { return true; }
 430   bool operator<=(GoodIter a) { return true; }
 431   bool operator>=(GoodIter a) { return false; }
 432   typedef int difference_type;
 433   typedef std::random_access_iterator_tag iterator_category;
 434 };
 435 // expected-note@+2 {{candidate function not viable: no known conversion from 'const Iter0' to 'GoodIter' for 2nd argument}}
 436 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'GoodIter' for 1st argument}}
 437 int operator-(GoodIter a, GoodIter b) { return 0; }
 438 // expected-note@+1 3 {{candidate function not viable: requires single argument 'a', but 2 arguments were provided}}
 439 GoodIter operator-(GoodIter a) { return a; }
 440 // expected-note@+2 {{candidate function not viable: no known conversion from 'const Iter0' to 'int' for 2nd argument}}
 441 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'GoodIter' for 1st argument}}
 442 GoodIter operator-(GoodIter a, int v) { return GoodIter(); }
 443 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter0' to 'GoodIter' for 1st argument}}
 444 GoodIter operator+(GoodIter a, int v) { return GoodIter(); }
 445 // expected-note@+2 {{candidate function not viable: no known conversion from 'GoodIter' to 'int' for 1st argument}}
 446 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'int' for 1st argument}}
 447 GoodIter operator-(int v, GoodIter a) { return GoodIter(); }
 448 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter0' to 'int' for 1st argument}}
 449 GoodIter operator+(int v, GoodIter a) { return GoodIter(); }
 450
 451 int test_with_random_access_iterator() {
 452   GoodIter begin, end;
 453   Iter0 begin0, end0;
 454 #pragma omp parallel
 455 #pragma omp master taskloop simd
 456   for (GoodIter I = begin; I < end; ++I)
 457     ++I;
 458 #pragma omp parallel
 459 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 460 #pragma omp master taskloop simd
 461   for (GoodIter &I = begin; I < end; ++I)
 462     ++I;
 463 #pragma omp parallel
 464 #pragma omp master taskloop simd
 465   for (GoodIter I = begin; I >= end; --I)
 466     ++I;
 467 #pragma omp parallel
 468 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 469 #pragma omp master taskloop simd
 470   for (GoodIter I(begin); I < end; ++I)
 471     ++I;
 472 #pragma omp parallel
 473 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 474 #pragma omp master taskloop simd
 475   for (GoodIter I(nullptr); I < end; ++I)
 476     ++I;
 477 #pragma omp parallel
 478 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 479 #pragma omp master taskloop simd
 480   for (GoodIter I(0); I < end; ++I)
 481     ++I;
 482 #pragma omp parallel
 483 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 484 #pragma omp master taskloop simd
 485   for (GoodIter I(1, 2); I < end; ++I)
 486     ++I;
 487 #pragma omp parallel
 488 #pragma omp master taskloop simd
 489   for (begin = GoodIter(0); begin < end; ++begin)
 490     ++begin;
 491 // expected-error@+4 {{invalid operands to binary expression ('GoodIter' and 'const Iter0')}}
 492 // expected-error@+3 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
 493 #pragma omp parallel
 494 #pragma omp master taskloop simd
 495   for (begin = begin0; begin < end; ++begin)
 496     ++begin;
 497 #pragma omp parallel
 498 // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 499 #pragma omp master taskloop simd
 500   for (++begin; begin < end; ++begin)
 501     ++begin;
 502 #pragma omp parallel
 503 #pragma omp master taskloop simd
 504   for (begin = end; begin < end; ++begin)
 505     ++begin;
 506 #pragma omp parallel
 507 // 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'}}
 508 #pragma omp master taskloop simd
 509   for (GoodIter I = begin; I - I; ++I)
 510     ++I;
 511 #pragma omp parallel
 512 // 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'}}
 513 #pragma omp master taskloop simd
 514   for (GoodIter I = begin; begin < end; ++I)
 515     ++I;
 516 #pragma omp parallel
 517 // 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'}}
 518 #pragma omp master taskloop simd
 519   for (GoodIter I = begin; !I; ++I)
 520     ++I;
 521 #pragma omp parallel
 522 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 523 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 524 #pragma omp master taskloop simd
 525   for (GoodIter I = begin; I >= end; I = I + 1)
 526     ++I;
 527 #pragma omp parallel
 528 #pragma omp master taskloop simd
 529   for (GoodIter I = begin; I >= end; I = I - 1)
 530     ++I;
 531 #pragma omp parallel
 532 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'I'}}
 533 #pragma omp master taskloop simd
 534   for (GoodIter I = begin; I >= end; I = -I)
 535     ++I;
 536 #pragma omp parallel
 537 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 538 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 539 #pragma omp master taskloop simd
 540   for (GoodIter I = begin; I >= end; I = 2 + I)
 541     ++I;
 542 #pragma omp parallel
 543 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'I'}}
 544 #pragma omp master taskloop simd
 545   for (GoodIter I = begin; I >= end; I = 2 - I)
 546     ++I;
 547 // In the following example, we cannot update the loop variable using '+='
 548 // expected-error@+3 {{invalid operands to binary expression ('Iter0' and 'int')}}
 549 #pragma omp parallel
 550 #pragma omp master taskloop simd
 551   for (Iter0 I = begin0; I < end0; ++I)
 552     ++I;
 553 #pragma omp parallel
 554 // Initializer is constructor without params.
 555 // expected-error@+3 {{invalid operands to binary expression ('Iter0' and 'int')}}
 556 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 557 #pragma omp master taskloop simd
 558   for (Iter0 I; I < end0; ++I)
 559     ++I;
 560   Iter1 begin1, end1;
 561 // expected-error@+4 {{invalid operands to binary expression ('Iter1' and 'Iter1')}}
 562 // expected-error@+3 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
 563 #pragma omp parallel
 564 #pragma omp master taskloop simd
 565   for (Iter1 I = begin1; I < end1; ++I)
 566     ++I;
 567 #pragma omp parallel
 568 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 569 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 570 #pragma omp master taskloop simd
 571   for (Iter1 I = begin1; I >= end1; ++I)
 572     ++I;
 573 #pragma omp parallel
 574 // expected-error@+5 {{invalid operands to binary expression ('Iter1' and 'float')}}
 575 // expected-error@+4 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
 576 // Initializer is constructor with all default params.
 577 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
 578 #pragma omp master taskloop simd
 579   for (Iter1 I; I < end1; ++I) {
 580   }
 581   return 0;
 582 }
 583
 584 template <typename IT, int ST>
 585 class TC {
 586 public:
 587   int dotest_lt(IT begin, IT end) {
 588 #pragma omp parallel
 589 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 590 // expected-error@+2 {{increment expression must cause 'I' to increase on each iteration of OpenMP for loop}}
 591 #pragma omp master taskloop simd
 592     for (IT I = begin; I < end; I = I + ST) {
 593       ++I;
 594     }
 595 #pragma omp parallel
 596 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
 597 // expected-error@+2 {{increment expression must cause 'I' to increase on each iteration of OpenMP for loop}}
 598 #pragma omp master taskloop simd
 599     for (IT I = begin; I <= end; I += ST) {
 600       ++I;
 601     }
 602 #pragma omp parallel
 603 #pragma omp master taskloop simd
 604     for (IT I = begin; I < end; ++I) {
 605       ++I;
 606     }
 607   }
 608
 609   static IT step() {
 610     return IT(ST);
 611   }
 612 };
 613 template <typename IT, int ST = 0>
 614 int dotest_gt(IT begin, IT end) {
 615 #pragma omp parallel
 616 // expected-note@+3 2 {{loop step is expected to be negative due to this condition}}
 617 // expected-error@+2 2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 618 #pragma omp master taskloop simd
 619   for (IT I = begin; I >= end; I = I + ST) {
 620     ++I;
 621   }
 622 #pragma omp parallel
 623 // expected-note@+3 2 {{loop step is expected to be negative due to this condition}}
 624 // expected-error@+2 2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 625 #pragma omp master taskloop simd
 626   for (IT I = begin; I >= end; I += ST) {
 627     ++I;
 628   }
 629
 630 #pragma omp parallel
 631 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
 632 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
 633 #pragma omp master taskloop simd
 634   for (IT I = begin; I >= end; ++I) {
 635     ++I;
 636   }
 637
 638 #pragma omp parallel
 639 #pragma omp master taskloop simd
 640   for (IT I = begin; I < end; I += TC<int, ST>::step()) {
 641     ++I;
 642   }
 643 }
 644
 645 void test_with_template() {
 646   GoodIter begin, end;
 647   TC<GoodIter, 100> t1;
 648   TC<GoodIter, -100> t2;
 649   t1.dotest_lt(begin, end);
 650   t2.dotest_lt(begin, end);         // expected-note {{in instantiation of member function 'TC<GoodIter, -100>::dotest_lt' requested here}}
 651   dotest_gt(begin, end);            // expected-note {{in instantiation of function template specialization 'dotest_gt<GoodIter, 0>' requested here}}
 652   dotest_gt<unsigned, 10>(0, 100);  // expected-note {{in instantiation of function template specialization 'dotest_gt<unsigned int, 10>' requested here}}
 653 }
 654
 655 void test_loop_break() {
 656   const int N = 100;
 657   float a[N], b[N], c[N];
 658 #pragma omp parallel
 659 #pragma omp master taskloop simd
 660   for (int i = 0; i < 10; i++) {
 661     c[i] = a[i] + b[i];
 662     for (int j = 0; j < 10; ++j) {
 663       if (a[i] > b[j])
 664         break; // OK in nested loop
 665     }
 666     switch (i) {
 667     case 1:
 668       b[i]++;
 669       break;
 670     default:
 671       break;
 672     }
 673     if (c[i] > 10)
 674       break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
 675
 676     if (c[i] > 11)
 677       break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
 678   }
 679
 680 #pragma omp parallel
 681 #pragma omp master taskloop simd
 682   for (int i = 0; i < 10; i++) {
 683     for (int j = 0; j < 10; j++) {
 684       c[i] = a[i] + b[i];
 685       if (c[i] > 10) {
 686         if (c[i] < 20) {
 687           break; // OK
 688         }
 689       }
 690     }
 691   }
 692 }
 693
 694 void test_loop_eh() {
 695   const int N = 100;
 696   float a[N], b[N], c[N];
 697 #pragma omp parallel
 698 #pragma omp master taskloop simd
 699   for (int i = 0; i < 10; i++) {
 700     c[i] = a[i] + b[i];
 701     try { // expected-error {{'try' statement cannot be used in OpenMP simd region}}
 702       for (int j = 0; j < 10; ++j) {
 703         if (a[i] > b[j])
 704           throw a[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
 705       }
 706       throw a[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
 707     } catch (float f) {
 708       if (f > 0.1)
 709         throw a[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
 710       return; // expected-error {{cannot return from OpenMP region}}
 711     }
 712     switch (i) {
 713     case 1:
 714       b[i]++;
 715       break;
 716     default:
 717       break;
 718     }
 719     for (int j = 0; j < 10; j++) {
 720       if (c[i] > 10)
 721         throw c[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
 722     }
 723   }
 724   if (c[9] > 10)
 725     throw c[9]; // OK
 726
 727 #pragma omp parallel
 728 #pragma omp master taskloop simd
 729   for (int i = 0; i < 10; ++i) {
 730     struct S {
 731       void g() { throw 0; }
 732     };
 733   }
 734 }
 735
 736 void test_loop_firstprivate_lastprivate() {
 737   S s(4);
 738 #pragma omp parallel
 739 #pragma omp master taskloop simd lastprivate(s) firstprivate(s)
 740   for (int i = 0; i < 16; ++i)
 741     ;
 742 }
 743