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