1 // RUN: %clang_cc1 -verify -fopenmp -ferror-limit 150 -o - %s -Wuninitialized
2 // RUN: %clang_cc1 -verify -fopenmp -std=c++98 -ferror-limit 150 -o - %s -Wuninitialized
3 // RUN: %clang_cc1 -verify -fopenmp -std=c++11 -ferror-limit 150 -o - %s -Wuninitialized
4 
5 // RUN: %clang_cc1 -verify -fopenmp-simd -ferror-limit 150 -o - %s -Wuninitialized
6 // RUN: %clang_cc1 -verify -fopenmp-simd -std=c++98 -ferror-limit 150 -o - %s -Wuninitialized
7 // RUN: %clang_cc1 -verify -fopenmp-simd -std=c++11 -ferror-limit 150 -o - %s -Wuninitialized
8 
9 extern int omp_default_mem_alloc;
10 void xxx(int argc) {
11   int fp; // expected-note {{initialize the variable 'fp' to silence this warning}}
12 #pragma omp parallel
13 #pragma omp for reduction(+:fp) // expected-warning {{variable 'fp' is uninitialized when used here}}
14   for (int i = 0; i < 10; ++i)
15     ;
16 }
17 
18 void foo() {
19 }
20 
21 bool foobool(int argc) {
22   return argc;
23 }
24 
25 void foobar(int &ref) {
26 #pragma omp parallel
27 #pragma omp for reduction(+:ref)
28   for (int i = 0; i < 10; ++i)
29     foo();
30 }
31 
32 struct S1; // expected-note {{declared here}} expected-note 4 {{forward declaration of 'S1'}}
33 extern S1 a;
34 class S2 {
35   mutable int a;
36   S2 &operator+(const S2 &arg) { return (*this); } // expected-note 3 {{implicitly declared private here}}
37 
38 public:
39   S2() : a(0) {}
40   S2(S2 &s2) : a(s2.a) {}
41   static float S2s; // expected-note 2 {{static data member is predetermined as shared}}
42   static const float S2sc; // expected-note 2 {{'S2sc' declared here}}
43 };
44 const float S2::S2sc = 0;
45 S2 b;                     // expected-note 3 {{'b' defined here}}
46 const S2 ba[5];           // expected-note 2 {{'ba' defined here}}
47 class S3 {
48   int a;
49 
50 public:
51   S3() : a(0) {}
52   S3(const S3 &s3) : a(s3.a) {}
53   S3 operator+(const S3 &arg1) { return arg1; }
54 };
55 int operator+(const S3 &arg1, const S3 &arg2) { return 5; }
56 S3 c;               // expected-note 3 {{'c' defined here}}
57 const S3 ca[5];     // expected-note 2 {{'ca' defined here}}
58 extern const int f; // expected-note 4 {{'f' declared here}}
59 class S4 {
60   int a;
61   S4(); // expected-note {{implicitly declared private here}}
62   S4(const S4 &s4);
63   S4 &operator+(const S4 &arg) { return (*this); }
64 
65 public:
66   S4(int v) : a(v) {}
67 };
68 S4 &operator&=(S4 &arg1, S4 &arg2) { return arg1; }
69 class S5 {
70   int a;
71   S5() : a(0) {} // expected-note {{implicitly declared private here}}
72   S5(const S5 &s5) : a(s5.a) {}
73   S5 &operator+(const S5 &arg);
74 
75 public:
76   S5(int v) : a(v) {}
77 };
78 class S6 { // expected-note 3 {{candidate function (the implicit copy assignment operator) not viable: no known conversion from 'int' to 'const S6' for 1st argument}}
79 #if __cplusplus >= 201103L // C++11 or later
80 // expected-note@-2 3 {{candidate function (the implicit move assignment operator) not viable: no known conversion from 'int' to 'S6' for 1st argument}}
81 #endif
82   int a;
83 
84 public:
85   S6() : a(6) {}
86   operator int() { return 6; }
87 } o;
88 
89 S3 h, k;
90 #pragma omp threadprivate(h) // expected-note 2 {{defined as threadprivate or thread local}}
91 
92 char *get();
93 
94 template <class T>       // expected-note {{declared here}}
95 T tmain(T argc) {
96   const T d = T();       // expected-note 4 {{'d' defined here}}
97   const T da[5] = {T()}; // expected-note 2 {{'da' defined here}}
98   T qa[5] = {T()};
99   T i, z;
100   T &j = i;                // expected-note 4 {{'j' defined here}}
101   S3 &p = k;               // expected-note 2 {{'p' defined here}}
102   const T &r = da[(int)i]; // expected-note 2 {{'r' defined here}}
103   T &q = qa[(int)i];       // expected-note 2 {{'q' defined here}}
104   T fl;
105 #pragma omp parallel
106 #pragma omp for reduction // expected-error {{expected '(' after 'reduction'}}
107   for (int i = 0; i < 10; ++i)
108     foo();
109 #pragma omp parallel
110 #pragma omp for reduction + // expected-error {{expected '(' after 'reduction'}} expected-warning {{extra tokens at the end of '#pragma omp for' are ignored}}
111   for (int i = 0; i < 10; ++i)
112     foo();
113 #pragma omp parallel
114 #pragma omp for reduction( // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected ')'}} expected-note {{to match this '('}}
115   for (int i = 0; i < 10; ++i)
116     foo();
117 #pragma omp parallel
118 #pragma omp for reduction(- // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
119   for (int i = 0; i < 10; ++i)
120     foo();
121 #pragma omp parallel
122 #pragma omp for reduction() // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
123   for (int i = 0; i < 10; ++i)
124     foo();
125 #pragma omp parallel
126 #pragma omp for reduction(*) // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}}
127   for (int i = 0; i < 10; ++i)
128     foo();
129 #pragma omp parallel
130 #pragma omp for reduction(\) // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
131   for (int i = 0; i < 10; ++i)
132     foo();
133 #pragma omp parallel
134 #pragma omp for reduction(& : argc // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{invalid operands to binary expression ('float' and 'float')}}
135   for (int i = 0; i < 10; ++i)
136     foo();
137 #pragma omp parallel
138 #pragma omp for reduction(| : argc, // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{invalid operands to binary expression ('float' and 'float')}}
139   for (int i = 0; i < 10; ++i)
140     foo();
141 #pragma omp parallel
142 #pragma omp for reduction(|| : argc ? i : argc) // expected-error 2 {{expected variable name}}
143   for (int i = 0; i < 10; ++i)
144     foo();
145 #pragma omp parallel
146 #pragma omp for reduction(foo : argc) // expected-error {{incorrect reduction identifier, expected one of '+', '-', '*', '&', '|', '^', '&&', '||', 'min' or 'max' or declare reduction for type 'float'}} expected-error {{incorrect reduction identifier, expected one of '+', '-', '*', '&', '|', '^', '&&', '||', 'min' or 'max' or declare reduction for type 'int'}}
147   for (int i = 0; i < 10; ++i)
148     foo();
149 #pragma omp parallel
150 #pragma omp for reduction(&& : argc)
151   for (int i = 0; i < 10; ++i)
152     foo();
153 #pragma omp parallel
154 #pragma omp for reduction(^ : T) // expected-error {{'T' does not refer to a value}}
155   for (int i = 0; i < 10; ++i)
156     foo();
157 #pragma omp parallel
158 #pragma omp for reduction(+ : z, a, b, c, d, f) // expected-error {{a reduction list item with incomplete type 'S1'}} expected-error 3 {{const-qualified variable cannot be reduction}} expected-error 2 {{'operator+' is a private member of 'S2'}}
159   for (int i = 0; i < 10; ++i)
160     foo();
161 #pragma omp parallel
162 #pragma omp for reduction(min : z, a, b, c, d, f) // expected-error {{a reduction list item with incomplete type 'S1'}} expected-error 4 {{arguments of OpenMP clause 'reduction' for 'min' or 'max' must be of arithmetic type}} expected-error 3 {{const-qualified variable cannot be reduction}}
163   for (int i = 0; i < 10; ++i)
164     foo();
165 #pragma omp parallel
166 #pragma omp for reduction(max : qa[1])
167   for (int i = 0; i < 10; ++i)
168     foo();
169 #pragma omp parallel
170 #pragma omp for reduction(+ : ba) // expected-error {{const-qualified variable cannot be reduction}}
171   for (int i = 0; i < 10; ++i)
172     foo();
173 #pragma omp parallel
174 #pragma omp for reduction(* : ca) // expected-error {{const-qualified variable cannot be reduction}}
175   for (int i = 0; i < 10; ++i)
176     foo();
177 #pragma omp parallel
178 #pragma omp for reduction(- : da) // expected-error {{const-qualified variable cannot be reduction}} expected-error {{const-qualified variable cannot be reduction}}
179   for (int i = 0; i < 10; ++i)
180     foo();
181 #pragma omp parallel
182 #pragma omp for reduction(^ : fl) // expected-error {{invalid operands to binary expression ('float' and 'float')}}
183   for (int i = 0; i < 10; ++i)
184     foo();
185 #pragma omp parallel
186 #pragma omp for reduction(&& : S2::S2s) // expected-error {{shared variable cannot be reduction}}
187   for (int i = 0; i < 10; ++i)
188     foo();
189 #pragma omp parallel
190 #pragma omp for reduction(&& : S2::S2sc) // expected-error {{const-qualified variable cannot be reduction}}
191   for (int i = 0; i < 10; ++i)
192     foo();
193 #pragma omp parallel
194 #pragma omp for reduction(+ : h, k) // expected-error {{threadprivate or thread local variable cannot be reduction}}
195   for (int i = 0; i < 10; ++i)
196     foo();
197 #pragma omp parallel
198 #pragma omp for reduction(+ : o) // expected-error 2 {{no viable overloaded '='}}
199   for (int i = 0; i < 10; ++i)
200     foo();
201 #pragma omp parallel
202 #pragma omp for private(i), reduction(+ : j), reduction(+ : q) // expected-error 4 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
203   for (int i = 0; i < 10; ++i)
204     foo();
205 #pragma omp parallel private(k)
206 #pragma omp for reduction(+ : p), reduction(+ : p) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
207   for (int i = 0; i < 10; ++i)
208     foo();
209 #pragma omp parallel
210 #pragma omp for reduction(+ : p), reduction(+ : p) // expected-error 2 {{variable can appear only once in OpenMP 'reduction' clause}} expected-note 2 {{previously referenced here}}
211   for (int i = 0; i < 10; ++i)
212     foo();
213 #pragma omp parallel
214 #pragma omp for reduction(+ : r) // expected-error 2 {{const-qualified variable cannot be reduction}}
215   for (int i = 0; i < 10; ++i)
216     foo();
217 #pragma omp parallel shared(i)
218 #pragma omp parallel reduction(min : i)
219 #pragma omp for reduction(max : j) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
220   for (int i = 0; i < 10; ++i)
221     foo();
222 #pragma omp parallel private(fl)  // expected-note 2 {{defined as private}}
223 #pragma omp for reduction(+ : fl) // expected-error 2 {{reduction variable must be shared}}
224   for (int i = 0; i < 10; ++i)
225     foo();
226 #pragma omp parallel private(qa)
227 #pragma omp for reduction(+ : qa[1], get()[0]) // expected-error {{expected variable name as a base of the array subscript}}
228   for (int i = 0; i < 10; ++i)
229     foo();
230 #pragma omp parallel shared(qa)
231 #pragma omp for reduction(+ : qa[1], qa[0])
232   for (int i = 0; i < 10; ++i)
233     foo();
234 #pragma omp parallel reduction(* : fl) // expected-note 2 {{defined as reduction}}
235 #pragma omp for reduction(+ : fl)      // expected-error 2 {{reduction variable must be shared}}
236   for (int i = 0; i < 10; ++i)
237     foo();
238 
239   return T();
240 }
241 
242 namespace A {
243 double x;
244 #pragma omp threadprivate(x) // expected-note {{defined as threadprivate or thread local}}
245 }
246 namespace B {
247 using A::x;
248 }
249 
250 int main(int argc, char **argv) {
251   const int d = 5;       // expected-note 2 {{'d' defined here}}
252   const int da[5] = {0}; // expected-note {{'da' defined here}}
253   int qa[5] = {0};
254   S4 e(4);
255   S5 g(5);
256   int i, z;
257   int &j = i;           // expected-note 2 {{'j' defined here}}
258   S3 &p = k;            // expected-note 2 {{'p' defined here}}
259   const int &r = da[i]; // expected-note {{'r' defined here}}
260   int &q = qa[i];       // expected-note {{'q' defined here}}
261   float fl;
262 #pragma omp parallel
263 #pragma omp for reduction // expected-error {{expected '(' after 'reduction'}}
264   for (int i = 0; i < 10; ++i)
265     foo();
266 #pragma omp parallel
267 #pragma omp for reduction + // expected-error {{expected '(' after 'reduction'}} expected-warning {{extra tokens at the end of '#pragma omp for' are ignored}}
268   for (int i = 0; i < 10; ++i)
269     foo();
270 #pragma omp parallel
271 #pragma omp for reduction( // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected ')'}} expected-note {{to match this '('}}
272   for (int i = 0; i < 10; ++i)
273     foo();
274 #pragma omp parallel
275 #pragma omp for reduction(- // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
276   for (int i = 0; i < 10; ++i)
277     foo();
278 #pragma omp parallel
279 #pragma omp for reduction() // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
280   for (int i = 0; i < 10; ++i)
281     foo();
282 #pragma omp parallel
283 #pragma omp for reduction(*) // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}}
284   for (int i = 0; i < 10; ++i)
285     foo();
286 #pragma omp parallel
287 #pragma omp for reduction(\) // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
288   for (int i = 0; i < 10; ++i)
289     foo();
290 #pragma omp parallel
291 #pragma omp for reduction(foo : argc // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{incorrect reduction identifier, expected one of '+', '-', '*', '&', '|', '^', '&&', '||', 'min' or 'max'}}
292   for (int i = 0; i < 10; ++i)
293     foo();
294 #pragma omp parallel
295 #pragma omp for reduction(| : argc, // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
296   for (int i = 0; i < 10; ++i)
297     foo();
298 #pragma omp parallel
299 #pragma omp for reduction(|| : argc > 0 ? argv[1] : argv[2]) // expected-error {{expected variable name}}
300   for (int i = 0; i < 10; ++i)
301     foo();
302 #pragma omp parallel
303 #pragma omp for reduction(~ : argc) // expected-error {{expected unqualified-id}}
304   for (int i = 0; i < 10; ++i)
305     foo();
306 #pragma omp parallel
307 #pragma omp for reduction(&& : argc) allocate , allocate(, allocate(omp_default , allocate(omp_default_mem_alloc, allocate(omp_default_mem_alloc:, allocate(omp_default_mem_alloc: argc, allocate(omp_default_mem_alloc: argv), allocate(argv) // expected-error {{expected '(' after 'allocate'}} expected-error 2 {{expected expression}} expected-error 2 {{expected ')'}} expected-error {{use of undeclared identifier 'omp_default'}} expected-note 2 {{to match this '('}}
308   for (int i = 0; i < 10; ++i)
309     foo();
310 #pragma omp parallel
311 #pragma omp for reduction(^ : S1) // expected-error {{'S1' does not refer to a value}}
312   for (int i = 0; i < 10; ++i)
313     foo();
314 #pragma omp parallel
315 #pragma omp for reduction(+ : a, b, c, d, f) // expected-error {{a reduction list item with incomplete type 'S1'}} expected-error 2 {{const-qualified variable cannot be reduction}} expected-error {{'operator+' is a private member of 'S2'}}
316   for (int i = 0; i < 10; ++i)
317     foo();
318 #pragma omp parallel
319 #pragma omp for reduction(min : a, b, c, d, f) // expected-error {{a reduction list item with incomplete type 'S1'}} expected-error 2 {{arguments of OpenMP clause 'reduction' for 'min' or 'max' must be of arithmetic type}} expected-error 2 {{const-qualified variable cannot be reduction}}
320   for (int i = 0; i < 10; ++i)
321     foo();
322 #pragma omp parallel
323 #pragma omp for reduction(max : argv[1], z)
324   for (int i = 0; i < 10; ++i)
325     foo();
326 #pragma omp parallel
327 #pragma omp for reduction(+ : ba) // expected-error {{const-qualified variable cannot be reduction}}
328   for (int i = 0; i < 10; ++i)
329     foo();
330 #pragma omp parallel
331 #pragma omp for reduction(* : ca) // expected-error {{const-qualified variable cannot be reduction}}
332   for (int i = 0; i < 10; ++i)
333     foo();
334 #pragma omp parallel
335 #pragma omp for reduction(- : da) // expected-error {{const-qualified variable cannot be reduction}}
336   for (int i = 0; i < 10; ++i)
337     foo();
338 #pragma omp parallel
339 #pragma omp for reduction(^ : fl) // expected-error {{invalid operands to binary expression ('float' and 'float')}}
340   for (int i = 0; i < 10; ++i)
341     foo();
342 #pragma omp parallel
343 #pragma omp for reduction(&& : S2::S2s) // expected-error {{shared variable cannot be reduction}}
344   for (int i = 0; i < 10; ++i)
345     foo();
346 #pragma omp parallel
347 #pragma omp for reduction(&& : S2::S2sc) // expected-error {{const-qualified variable cannot be reduction}}
348   for (int i = 0; i < 10; ++i)
349     foo();
350 #pragma omp parallel
351 #pragma omp for reduction(& : e, g) // expected-error {{calling a private constructor of class 'S4'}} expected-error {{calling a private constructor of class 'S5'}} expected-error {{invalid operands to binary expression ('S4' and 'S4')}} expected-error {{invalid operands to binary expression ('S5' and 'S5')}}
352   for (int i = 0; i < 10; ++i)
353     foo();
354 #pragma omp parallel
355 #pragma omp for reduction(+ : h, k) // expected-error {{threadprivate or thread local variable cannot be reduction}}
356   for (int i = 0; i < 10; ++i)
357     foo();
358 #pragma omp parallel
359 #pragma omp for reduction(+ : B::x, k) // expected-error {{threadprivate or thread local variable cannot be reduction}}
360   for (int i = 0; i < 10; ++i)
361     foo();
362 #pragma omp parallel
363 #pragma omp for reduction(+ : o) // expected-error {{no viable overloaded '='}}
364   for (int i = 0; i < 10; ++i)
365     foo();
366 #pragma omp parallel
367 #pragma omp for private(i), reduction(+ : j), reduction(+ : q) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
368   for (int i = 0; i < 10; ++i)
369     foo();
370 #pragma omp parallel private(k)
371 #pragma omp for reduction(+ : p), reduction(+ : p) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
372   for (int i = 0; i < 10; ++i)
373     foo();
374 #pragma omp parallel
375 #pragma omp for reduction(+ : p), reduction(+ : p) // expected-error {{variable can appear only once in OpenMP 'reduction' clause}} expected-note {{previously referenced here}}
376   for (int i = 0; i < 10; ++i)
377     foo();
378 #pragma omp parallel
379 #pragma omp for reduction(+ : r) // expected-error {{const-qualified variable cannot be reduction}}
380   for (int i = 0; i < 10; ++i)
381     foo();
382 #pragma omp parallel shared(i)
383 #pragma omp parallel reduction(min : i)
384 #pragma omp for reduction(max : j) // expected-error {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
385   for (int i = 0; i < 10; ++i)
386     foo();
387 #pragma omp parallel private(fl)  // expected-note {{defined as private}}
388 #pragma omp for reduction(+ : fl) // expected-error {{reduction variable must be shared}}
389   for (int i = 0; i < 10; ++i)
390     foo();
391 #pragma omp parallel private(argv)
392 #pragma omp for reduction(+ : argv[1], get()[0]) // expected-error {{expected variable name as a base of the array subscript}} expected-error {{invalid operands to binary expression ('char *' and 'char *')}}
393   for (int i = 0; i < 10; ++i)
394     foo();
395 #pragma omp parallel shared(qa)
396 #pragma omp for reduction(+ : qa[1], qa[0])
397   for (int i = 0; i < 10; ++i)
398     foo();
399 #pragma omp parallel reduction(* : fl) // expected-note {{defined as reduction}}
400 #pragma omp for reduction(+ : fl)      // expected-error {{reduction variable must be shared}}
401   for (int i = 0; i < 10; ++i)
402     foo();
403   static int m=0;
404 #pragma omp for reduction(+:m)
405   for (int i = 0; i < 10; ++i)
406     m++;
407 
408   return tmain(argc) + tmain(fl); // expected-note {{in instantiation of function template specialization 'tmain<int>' requested here}} expected-note {{in instantiation of function template specialization 'tmain<float>' requested here}}
409 }
410