1 // RUN: %clang_cc1 -fsyntax-only -fopenmp -x c++ -std=c++11 -fexceptions -fcxx-exceptions -verify %s
9 S(const S &s) : a(s.a) {}
13 #pragma omp threadprivate(sii)
16 int test_iteration_spaces() {
18 float a[N], b[N], c[N];
22 #pragma omp parallel for
23 for (int i = 0; i < 10; i += 1) {
26 #pragma omp parallel for
27 for (char i = 0; i < 10; i++) {
30 #pragma omp parallel for
31 for (char i = 0; i < 10; i += '\1') {
34 #pragma omp parallel for
35 for (long long i = 0; i < 10; i++) {
38 // expected-error@+2 {{expression must have integral or unscoped enumeration type, not 'double'}}
39 #pragma omp parallel for
40 for (long long i = 0; i < 10; i += 1.5) {
43 #pragma omp parallel for
44 for (long long i = 0; i < 'z'; i += 1u) {
47 // expected-error@+2 {{variable must be of integer or random access iterator type}}
48 #pragma omp parallel for
49 for (float fi = 0; fi < 10.0; fi++) {
50 c[(int)fi] = a[(int)fi] + b[(int)fi];
52 // expected-error@+2 {{variable must be of integer or random access iterator type}}
53 #pragma omp parallel for
54 for (double fi = 0; fi < 10.0; fi++) {
55 c[(int)fi] = a[(int)fi] + b[(int)fi];
57 // expected-error@+2 {{variable must be of integer or random access iterator type}}
58 #pragma omp parallel for
59 for (int &ref = ii; ref < 10; ref++) {
61 // expected-error@+2 {{initialization clause of OpenMP for loop must be of the form 'var = init' or 'T var = init'}}
62 #pragma omp parallel for
63 for (int i; i < 10; i++)
66 // expected-error@+2 {{initialization clause of OpenMP for loop must be of the form 'var = init' or 'T var = init'}}
67 #pragma omp parallel for
68 for (int i = 0, j = 0; i < 10; ++i)
71 // expected-error@+2 {{initialization clause of OpenMP for loop must be of the form 'var = init' or 'T var = init'}}
72 #pragma omp parallel for
76 // expected-warning@+3 {{expression result unused}}
77 // expected-error@+2 {{initialization clause of OpenMP for loop must be of the form 'var = init' or 'T var = init'}}
78 #pragma omp parallel for
79 for (ii + 1; ii < 10; ++ii)
82 // expected-error@+2 {{initialization clause of OpenMP for loop must be of the form 'var = init' or 'T var = init'}}
83 #pragma omp parallel for
84 for (c[ii] = 0; ii < 10; ++ii)
87 // Ok to skip parenthesises.
88 #pragma omp parallel for
89 for (((ii)) = 0; ii < 10; ++ii)
92 // expected-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}}
93 #pragma omp parallel for
94 for (int i = 0; i; i++)
97 // expected-error@+3 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}}
98 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'i'}}
99 #pragma omp parallel for
100 for (int i = 0; jj < kk; ii++)
103 // expected-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}}
104 #pragma omp parallel for
105 for (int i = 0; !!i; i++)
108 // expected-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}}
109 #pragma omp parallel for
110 for (int i = 0; i != 1; i++)
113 // expected-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}}
114 #pragma omp parallel for
115 for (int i = 0;; i++)
119 #pragma omp parallel for
120 for (int i = 11; i > 10; i--)
124 #pragma omp parallel for
125 for (int i = 0; i < 10; ++i)
129 #pragma omp parallel for
130 for (ii = 0; ii < 10; ++ii)
133 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
134 #pragma omp parallel for
135 for (ii = 0; ii < 10; ++jj)
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
140 for (ii = 0; ii < 10; ++++ii)
143 // Ok but undefined behavior (in general, cannot check that incr
144 // is really loop-invariant).
145 #pragma omp parallel for
146 for (ii = 0; ii < 10; ii = ii + ii)
149 // expected-error@+2 {{expression must have integral or unscoped enumeration type, not 'float'}}
150 #pragma omp parallel for
151 for (ii = 0; ii < 10; ii = ii + 1.0f)
154 // Ok - step was converted to integer type.
155 #pragma omp parallel for
156 for (ii = 0; ii < 10; ii = ii + (int)1.1f)
159 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
160 #pragma omp parallel for
161 for (ii = 0; ii < 10; jj = ii + 2)
164 // expected-warning@+3 {{relational comparison result unused}}
165 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
166 #pragma omp parallel for
167 for (ii = 0; ii<10; jj> kk + 2)
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
172 for (ii = 0; ii < 10;)
175 // expected-warning@+3 {{expression result unused}}
176 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
177 #pragma omp parallel for
178 for (ii = 0; ii < 10; !ii)
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
183 for (ii = 0; ii < 10; ii ? ++ii : ++jj)
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
188 for (ii = 0; ii < 10; ii = ii < 10)
191 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
192 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
193 #pragma omp parallel for
194 for (ii = 0; ii < 10; ii = ii + 0)
197 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
198 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
199 #pragma omp parallel for
200 for (ii = 0; ii < 10; ii = ii + (int)(0.8 - 0.45))
203 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
204 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
205 #pragma omp parallel for
206 for (ii = 0; (ii) < 10; ii -= 25)
209 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
210 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
211 #pragma omp parallel for
212 for (ii = 0; (ii < 10); ii -= 0)
215 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
216 // expected-error@+2 {{increment expression must cause 'ii' to decrease on each iteration of OpenMP for loop}}
217 #pragma omp parallel for
218 for (ii = 0; ii > 10; (ii += 0))
221 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
222 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
223 #pragma omp parallel for
224 for (ii = 0; ii < 10; (ii) = (1 - 1) + (ii))
227 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
228 // expected-error@+2 {{increment expression must cause 'ii' to decrease on each iteration of OpenMP for loop}}
229 #pragma omp parallel for
230 for ((ii = 0); ii > 10; (ii -= 0))
233 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
234 // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
235 #pragma omp parallel for
236 for (ii = 0; (ii < 10); (ii -= 0))
239 // expected-note@+2 {{defined as firstprivate}}
240 // expected-error@+2 {{loop iteration variable in the associated loop of 'omp parallel for' directive may not be firstprivate, predetermined as private}}
241 #pragma omp parallel for firstprivate(ii)
242 for (ii = 0; ii < 10; ii++)
245 // expected-error@+3 {{unexpected OpenMP clause 'linear' in directive '#pragma omp parallel for'}}
246 // expected-note@+2 {{defined as linear}}
247 // expected-error@+2 {{loop iteration variable in the associated loop of 'omp parallel for' directive may not be linear, predetermined as private}}
248 #pragma omp parallel for linear(ii)
249 for (ii = 0; ii < 10; ii++)
252 #pragma omp parallel for private(ii)
253 for (ii = 0; ii < 10; ii++)
256 #pragma omp parallel for lastprivate(ii)
257 for (ii = 0; ii < 10; ii++)
261 #pragma omp parallel for
262 for (sii = 0; sii < 10; sii += 1)
267 #pragma omp parallel for
268 for (globalii = 0; globalii < 10; globalii += 1)
269 c[globalii] = a[globalii];
273 #pragma omp parallel for collapse(2)
274 for (ii = 0; ii < 10; ii += 1)
275 for (globalii = 0; globalii < 10; globalii += 1)
276 c[globalii] += a[globalii] + ii;
279 // expected-error@+2 {{statement after '#pragma omp parallel for' must be a for loop}}
280 #pragma omp parallel for
281 for (auto &item : a) {
285 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
286 // expected-error@+2 {{increment expression must cause 'i' to increase on each iteration of OpenMP for loop}}
287 #pragma omp parallel for
288 for (unsigned i = 9; i < 10; i--) {
292 int(*lb)[4] = nullptr;
293 #pragma omp parallel for
294 for (int(*p)[4] = lb; p < lb + 8; ++p) {
297 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
298 #pragma omp parallel for
299 for (int a{0}; a < 10; ++a) {
305 // Iterators allowed in openmp for-loops.
307 struct random_access_iterator_tag {};
308 template <class Iter>
309 struct iterator_traits {
310 typedef typename Iter::difference_type difference_type;
311 typedef typename Iter::iterator_category iterator_category;
313 template <class Iter>
314 typename iterator_traits<Iter>::difference_type
315 distance(Iter first, Iter last) { return first - last; }
320 Iter0(const Iter0 &) {}
321 Iter0 operator++() { return *this; }
322 Iter0 operator--() { return *this; }
323 bool operator<(Iter0 a) { return true; }
325 // expected-note@+2 {{candidate function not viable: no known conversion from 'GoodIter' to 'Iter0' for 1st argument}}
326 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'Iter0' for 1st argument}}
327 int operator-(Iter0 a, Iter0 b) { return 0; }
330 Iter1(float f = 0.0f, double d = 0.0) {}
331 Iter1(const Iter1 &) {}
332 Iter1 operator++() { return *this; }
333 Iter1 operator--() { return *this; }
334 bool operator<(Iter1 a) { return true; }
335 bool operator>=(Iter1 a) { return false; }
340 GoodIter(const GoodIter &) {}
341 GoodIter(int fst, int snd) {}
342 GoodIter &operator=(const GoodIter &that) { return *this; }
343 GoodIter &operator=(const Iter0 &that) { return *this; }
344 GoodIter &operator+=(int x) { return *this; }
345 GoodIter &operator-=(int x) { return *this; }
346 explicit GoodIter(void *) {}
347 GoodIter operator++() { return *this; }
348 GoodIter operator--() { return *this; }
349 bool operator!() { return true; }
350 bool operator<(GoodIter a) { return true; }
351 bool operator<=(GoodIter a) { return true; }
352 bool operator>=(GoodIter a) { return false; }
353 typedef int difference_type;
354 typedef std::random_access_iterator_tag iterator_category;
356 // expected-note@+2 {{candidate function not viable: no known conversion from 'const Iter0' to 'GoodIter' for 2nd argument}}
357 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'GoodIter' for 1st argument}}
358 int operator-(GoodIter a, GoodIter b) { return 0; }
359 // expected-note@+1 3 {{candidate function not viable: requires single argument 'a', but 2 arguments were provided}}
360 GoodIter operator-(GoodIter a) { return a; }
361 // expected-note@+2 {{candidate function not viable: no known conversion from 'const Iter0' to 'int' for 2nd argument}}
362 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'GoodIter' for 1st argument}}
363 GoodIter operator-(GoodIter a, int v) { return GoodIter(); }
364 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter0' to 'GoodIter' for 1st argument}}
365 GoodIter operator+(GoodIter a, int v) { return GoodIter(); }
366 // expected-note@+2 {{candidate function not viable: no known conversion from 'GoodIter' to 'int' for 1st argument}}
367 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'int' for 1st argument}}
368 GoodIter operator-(int v, GoodIter a) { return GoodIter(); }
369 // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter0' to 'int' for 1st argument}}
370 GoodIter operator+(int v, GoodIter a) { return GoodIter(); }
372 int test_with_random_access_iterator() {
375 #pragma omp parallel for
376 for (GoodIter I = begin; I < end; ++I)
378 // expected-error@+2 {{variable must be of integer or random access iterator type}}
379 #pragma omp parallel for
380 for (GoodIter &I = begin; I < end; ++I)
382 #pragma omp parallel for
383 for (GoodIter I = begin; I >= end; --I)
385 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
386 #pragma omp parallel for
387 for (GoodIter I(begin); I < end; ++I)
389 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
390 #pragma omp parallel for
391 for (GoodIter I(nullptr); I < end; ++I)
393 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
394 #pragma omp parallel for
395 for (GoodIter I(0); I < end; ++I)
397 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
398 #pragma omp parallel for
399 for (GoodIter I(1, 2); I < end; ++I)
401 #pragma omp parallel for
402 for (begin = GoodIter(0); begin < end; ++begin)
404 // expected-error@+3 {{invalid operands to binary expression ('GoodIter' and 'const Iter0')}}
405 // expected-error@+2 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
406 #pragma omp parallel for
407 for (begin = begin0; begin < end; ++begin)
409 // expected-error@+2 {{initialization clause of OpenMP for loop must be of the form 'var = init' or 'T var = init'}}
410 #pragma omp parallel for
411 for (++begin; begin < end; ++begin)
413 #pragma omp parallel for
414 for (begin = end; begin < end; ++begin)
416 // expected-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'I'}}
417 #pragma omp parallel for
418 for (GoodIter I = begin; I - I; ++I)
420 // expected-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'I'}}
421 #pragma omp parallel for
422 for (GoodIter I = begin; begin < end; ++I)
424 // expected-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'I'}}
425 #pragma omp parallel for
426 for (GoodIter I = begin; !I; ++I)
428 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
429 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
430 #pragma omp parallel for
431 for (GoodIter I = begin; I >= end; I = I + 1)
433 #pragma omp parallel for
434 for (GoodIter I = begin; I >= end; I = I - 1)
436 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'I'}}
437 #pragma omp parallel for
438 for (GoodIter I = begin; I >= end; I = -I)
440 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
441 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
442 #pragma omp parallel for
443 for (GoodIter I = begin; I >= end; I = 2 + I)
445 // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'I'}}
446 #pragma omp parallel for
447 for (GoodIter I = begin; I >= end; I = 2 - I)
449 // expected-error@+2 {{invalid operands to binary expression ('Iter0' and 'int')}}
450 #pragma omp parallel for
451 for (Iter0 I = begin0; I < end0; ++I)
453 // Initializer is constructor without params.
454 // expected-error@+3 {{invalid operands to binary expression ('Iter0' and 'int')}}
455 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
456 #pragma omp parallel for
457 for (Iter0 I; I < end0; ++I)
460 // expected-error@+3 {{invalid operands to binary expression ('Iter1' and 'Iter1')}}
461 // expected-error@+2 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
462 #pragma omp parallel for
463 for (Iter1 I = begin1; I < end1; ++I)
465 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
466 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
467 #pragma omp parallel for
468 for (Iter1 I = begin1; I >= end1; ++I)
470 // expected-error@+5 {{invalid operands to binary expression ('Iter1' and 'Iter1')}}
471 // expected-error@+4 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
472 // Initializer is constructor with all default params.
473 // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
474 #pragma omp parallel for
475 for (Iter1 I; I < end1; ++I) {
480 template <typename IT, int ST>
483 int dotest_lt(IT begin, IT end) {
484 // expected-note@+3 {{loop step is expected to be positive due to this condition}}
485 // expected-error@+2 {{increment expression must cause 'I' to increase on each iteration of OpenMP for loop}}
486 #pragma omp parallel for
487 for (IT I = begin; I < end; I = I + ST) {
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
493 for (IT I = begin; I <= end; I += ST) {
496 #pragma omp parallel for
497 for (IT I = begin; I < end; ++I) {
506 template <typename IT, int ST = 0>
507 int dotest_gt(IT begin, IT end) {
508 // expected-note@+3 2 {{loop step is expected to be negative due to this condition}}
509 // expected-error@+2 2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
510 #pragma omp parallel for
511 for (IT I = begin; I >= end; I = I + ST) {
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
517 for (IT I = begin; I >= end; I += ST) {
521 // expected-note@+3 {{loop step is expected to be negative due to this condition}}
522 // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
523 #pragma omp parallel for
524 for (IT I = begin; I >= end; ++I) {
528 #pragma omp parallel for
529 for (IT I = begin; I < end; I += TC<int, ST>::step()) {
534 void test_with_template() {
536 TC<GoodIter, 100> t1;
537 TC<GoodIter, -100> t2;
538 t1.dotest_lt(begin, end);
539 t2.dotest_lt(begin, end); // expected-note {{in instantiation of member function 'TC<GoodIter, -100>::dotest_lt' requested here}}
540 dotest_gt(begin, end); // expected-note {{in instantiation of function template specialization 'dotest_gt<GoodIter, 0>' requested here}}
541 dotest_gt<unsigned, -10>(0, 100); // expected-note {{in instantiation of function template specialization 'dotest_gt<unsigned int, -10>' requested here}}
544 void test_loop_break() {
546 float a[N], b[N], c[N];
547 #pragma omp parallel for
548 for (int i = 0; i < 10; i++) {
550 for (int j = 0; j < 10; ++j) {
552 break; // OK in nested loop
562 break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
565 break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
568 #pragma omp parallel for
569 for (int i = 0; i < 10; i++) {
570 for (int j = 0; j < 10; j++) {
581 void test_loop_eh() {
583 float a[N], b[N], c[N];
584 #pragma omp parallel for
585 for (int i = 0; i < 10; i++) {
588 for (int j = 0; j < 10; ++j) {
596 return; // expected-error {{cannot return from OpenMP region}}
605 for (int j = 0; j < 10; j++) {
613 #pragma omp parallel for
614 for (int i = 0; i < 10; ++i) {
616 void g() { throw 0; }
621 void test_loop_firstprivate_lastprivate() {
623 #pragma omp parallel for lastprivate(s) firstprivate(s)
624 for (int i = 0; i < 16; ++i)