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 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 reduction(+:ref)
26   foo();
27 }
28 
29 struct S1; // expected-note {{declared here}} expected-note 4 {{forward declaration of 'S1'}}
30 extern S1 a;
31 class S2 {
32   mutable int a;
33   S2 &operator+(const S2 &arg) { return (*this); } // expected-note 3 {{implicitly declared private here}}
34 
35 public:
36   S2() : a(0) {}
37   S2(S2 &s2) : a(s2.a) {}
38   static float S2s; // expected-note 2 {{static data member is predetermined as shared}}
39   static const float S2sc; // expected-note 2 {{'S2sc' declared here}}
40 };
41 const float S2::S2sc = 0;
42 S2 b;                     // expected-note 3 {{'b' defined here}}
43 const S2 ba[5];           // expected-note 2 {{'ba' defined here}}
44 class S3 {
45   int a;
46 
47 public:
48   int b;
49   S3() : a(0) {}
50   S3(const S3 &s3) : a(s3.a) {}
51   S3 operator+(const S3 &arg1) { return arg1; }
52 };
53 int operator+(const S3 &arg1, const S3 &arg2) { return 5; }
54 S3 c;               // expected-note 3 {{'c' defined here}}
55 const S3 ca[5];     // expected-note 2 {{'ca' defined here}}
56 extern const int f; // expected-note 4 {{'f' declared here}}
57 class S4 {
58   int a;
59   S4(); // expected-note {{implicitly declared private here}}
60   S4(const S4 &s4);
61   S4 &operator+(const S4 &arg) { return (*this); }
62 
63 public:
64   S4(int v) : a(v) {}
65 };
66 S4 &operator&=(S4 &arg1, S4 &arg2) { return arg1; }
67 class S5 {
68   int a;
69   S5() : a(0) {} // expected-note {{implicitly declared private here}}
70   S5(const S5 &s5) : a(s5.a) {}
71   S5 &operator+(const S5 &arg);
72 
73 public:
74   S5(int v) : a(v) {}
75 };
76 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}}
77 #if __cplusplus >= 201103L // C++11 or later
78 // expected-note@-2 3 {{candidate function (the implicit move assignment operator) not viable}}
79 #endif
80   int a;
81 
82 public:
83   S6() : a(6) {}
84   operator int() { return 6; }
85 } o;
86 
87 S3 h, k;
88 #pragma omp threadprivate(h) // expected-note 2 {{defined as threadprivate or thread local}}
89 
90 template <class T>       // expected-note {{declared here}}
91 T tmain(T argc) {
92   const T d = T();       // expected-note 4 {{'d' defined here}}
93   const T da[5] = {T()}; // expected-note 2 {{'da' defined here}}
94   T qa[5] = {T()};
95   T i, z;
96   T &j = i;                    // expected-note 4 {{'j' defined here}}
97   S3 &p = k;                   // expected-note 2 {{'p' defined here}}
98   const T &r = da[(int)i];     // expected-note 2 {{'r' defined here}}
99   T &q = qa[(int)i];           // expected-note 2 {{'q' defined here}}
100   T fl;
101 #pragma omp parallel reduction // expected-error {{expected '(' after 'reduction'}}
102   foo();
103 #pragma omp parallel reduction + // expected-error {{expected '(' after 'reduction'}} expected-warning {{extra tokens at the end of '#pragma omp parallel' are ignored}}
104   foo();
105 #pragma omp parallel reduction( // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected ')'}} expected-note {{to match this '('}}
106   foo();
107 #pragma omp parallel reduction(- // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
108   foo();
109 #pragma omp parallel reduction() // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
110   foo();
111 #pragma omp parallel reduction(*) // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}}
112   foo();
113 #pragma omp parallel reduction(\) // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
114   foo();
115 #pragma omp parallel reduction(& : argc // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{invalid operands to binary expression ('float' and 'float')}}
116   foo();
117 #pragma omp parallel reduction(| : argc, // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{invalid operands to binary expression ('float' and 'float')}}
118   foo();
119 #pragma omp parallel reduction(|| : argc ? i : argc) // expected-error 2 {{expected variable name, array element or array section}}
120   foo();
121 #pragma omp parallel 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'}}
122   foo();
123 #pragma omp parallel 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 '('}}
124   foo();
125 #pragma omp parallel reduction(^ : T) // expected-error {{'T' does not refer to a value}}
126   foo();
127 #pragma omp parallel 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'}}
128   foo();
129 #pragma omp parallel 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}}
130   foo();
131 #pragma omp parallel reduction(max : h.b) // expected-error {{expected variable name, array element or array section}}
132   foo();
133 #pragma omp parallel reduction(+ : ba) // expected-error {{const-qualified variable cannot be reduction}}
134   foo();
135 #pragma omp parallel reduction(* : ca) // expected-error {{const-qualified variable cannot be reduction}}
136   foo();
137 #pragma omp parallel reduction(- : da) // expected-error {{const-qualified variable cannot be reduction}} expected-error {{const-qualified variable cannot be reduction}}
138   foo();
139 #pragma omp parallel reduction(^ : fl) // expected-error {{invalid operands to binary expression ('float' and 'float')}}
140   foo();
141 #pragma omp parallel reduction(&& : S2::S2s) // expected-error {{shared variable cannot be reduction}}
142   foo();
143 #pragma omp parallel reduction(&& : S2::S2sc) // expected-error {{const-qualified variable cannot be reduction}}
144   foo();
145 #pragma omp parallel reduction(+ : h, k) // expected-error {{threadprivate or thread local variable cannot be reduction}}
146   foo();
147 #pragma omp parallel reduction(+ : o) // expected-error 2 {{no viable overloaded '='}}
148   foo();
149 #pragma omp parallel private(i), reduction(+ : j), reduction(+ : q) // expected-error 4 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
150   foo();
151 #pragma omp parallel private(k)
152 #pragma omp parallel reduction(+ : p), reduction(+ : p) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
153   foo();
154 #pragma omp parallel reduction(+ : p), reduction(+ : p) // expected-error 2 {{variable can appear only once in OpenMP 'reduction' clause}} expected-note 2 {{previously referenced here}}
155   foo();
156 #pragma omp parallel reduction(+ : r) // expected-error 2 {{const-qualified variable cannot be reduction}}
157   foo();
158 #pragma omp parallel shared(i)
159 #pragma omp parallel reduction(min : i)
160 #pragma omp parallel reduction(max : j) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
161   foo();
162 #pragma omp parallel
163 #pragma omp for private(fl)
164   for (int i = 0; i < 10; ++i)
165 #pragma omp parallel reduction(+ : fl)
166     foo();
167 #pragma omp parallel
168 #pragma omp for reduction(- : fl)
169   for (int i = 0; i < 10; ++i)
170 #pragma omp parallel reduction(+ : fl)
171     foo();
172 
173   return T();
174 }
175 
176 namespace A {
177 double x;
178 #pragma omp threadprivate(x) // expected-note {{defined as threadprivate or thread local}}
179 }
180 namespace B {
181 using A::x;
182 }
183 
184 int main(int argc, char **argv) {
185   const int d = 5;       // expected-note 2 {{'d' defined here}}
186   const int da[5] = {0}; // expected-note {{'da' defined here}}
187   int qa[5] = {0};
188   S4 e(4);
189   S5 g(5);
190   int i, z;
191   int &j = i;                  // expected-note 2 {{'j' defined here}}
192   S3 &p = k;                   // expected-note 2 {{'p' defined here}}
193   const int &r = da[i];        // expected-note {{'r' defined here}}
194   int &q = qa[i];              // expected-note {{'q' defined here}}
195   float fl;
196 #pragma omp parallel reduction // expected-error {{expected '(' after 'reduction'}}
197   foo();
198 #pragma omp parallel reduction + // expected-error {{expected '(' after 'reduction'}} expected-warning {{extra tokens at the end of '#pragma omp parallel' are ignored}}
199   foo();
200 #pragma omp parallel reduction( // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected ')'}} expected-note {{to match this '('}}
201   foo();
202 #pragma omp parallel reduction(- // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
203   foo();
204 #pragma omp parallel reduction() // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
205   foo();
206 #pragma omp parallel reduction(*) // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}}
207   foo();
208 #pragma omp parallel reduction(\) // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
209   foo();
210 #pragma omp parallel reduction(foo : argc // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{incorrect reduction identifier, expected one of '+', '-', '*', '&', '|', '^', '&&', '||', 'min' or 'max'}}
211   foo();
212 #pragma omp parallel reduction(| : argc, // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
213   foo();
214 #pragma omp parallel reduction(|| : argc > 0 ? argv[1] : argv[2]) // expected-error {{expected variable name, array element or array section}}
215   foo();
216 #pragma omp parallel reduction(~ : argc) // expected-error {{expected unqualified-id}}
217   foo();
218 #pragma omp parallel reduction(&& : argc, z)
219   foo();
220 #pragma omp parallel reduction(^ : S1) // expected-error {{'S1' does not refer to a value}}
221   foo();
222 #pragma omp parallel 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'}}
223   foo();
224 #pragma omp parallel 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}}
225   foo();
226 #pragma omp parallel reduction(max : h.b) // expected-error {{expected variable name, array element or array section}}
227   foo();
228 #pragma omp parallel reduction(+ : ba) // expected-error {{const-qualified variable cannot be reduction}}
229   foo();
230 #pragma omp parallel reduction(* : ca) // expected-error {{const-qualified variable cannot be reduction}}
231   foo();
232 #pragma omp parallel reduction(- : da) // expected-error {{const-qualified variable cannot be reduction}}
233   foo();
234 #pragma omp parallel reduction(^ : fl) // expected-error {{invalid operands to binary expression ('float' and 'float')}}
235   foo();
236 #pragma omp parallel reduction(&& : S2::S2s) // expected-error {{shared variable cannot be reduction}}
237   foo();
238 #pragma omp parallel reduction(&& : S2::S2sc) // expected-error {{const-qualified variable cannot be reduction}}
239   foo();
240 #pragma omp parallel reduction(& : e, g) // expected-error {{calling a private constructor of class 'S4'}} expected-error {{nvalid operands to binary expression ('S4' and 'S4')}} expected-error {{calling a private constructor of class 'S5'}} expected-error {{invalid operands to binary expression ('S5' and 'S5')}}
241   foo();
242 #pragma omp parallel reduction(+ : h, k, B::x) // expected-error 2 {{threadprivate or thread local variable cannot be reduction}}
243   foo();
244 #pragma omp parallel reduction(+ : o) // expected-error {{no viable overloaded '='}}
245   foo();
246 #pragma omp parallel private(i), reduction(+ : j), reduction(+ : q) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
247   foo();
248 #pragma omp parallel private(k)
249 #pragma omp parallel reduction(+ : p), reduction(+ : p) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
250   foo();
251 #pragma omp parallel reduction(+ : p), reduction(+ : p) // expected-error {{variable can appear only once in OpenMP 'reduction' clause}} expected-note {{previously referenced here}}
252   foo();
253 #pragma omp parallel reduction(+ : r) // expected-error {{const-qualified variable cannot be reduction}}
254   foo();
255 #pragma omp parallel shared(i)
256 #pragma omp parallel reduction(min : i)
257 #pragma omp parallel reduction(max : j) // expected-error {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
258   foo();
259 #pragma omp parallel
260 #pragma omp for private(fl)
261   for (int i = 0; i < 10; ++i)
262 #pragma omp parallel reduction(+ : fl)
263     foo();
264 #pragma omp parallel
265 #pragma omp for reduction(- : fl)
266   for (int i = 0; i < 10; ++i)
267 #pragma omp parallel reduction(+ : fl)
268     foo();
269   static int m;
270 #pragma omp parallel reduction(+ : m) // OK
271   m++;
272 
273   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}}
274 }
275