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