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      1 // RUN: %clang_cc1 -verify -fopenmp=libiomp5 -ferror-limit 100 -o - %s
      2 
      3 void foo() {
      4 }
      5 
      6 bool foobool(int argc) {
      7   return argc;
      8 }
      9 
     10 struct S1; // expected-note {{declared here}} expected-note 4 {{forward declaration of 'S1'}}
     11 extern S1 a;
     12 class S2 {
     13   mutable int a;
     14   S2 &operator+=(const S2 &arg) { return (*this); }
     15 
     16 public:
     17   S2() : a(0) {}
     18   S2(S2 &s2) : a(s2.a) {}
     19   static float S2s; // expected-note 2 {{static data member is predetermined as shared}}
     20   static const float S2sc;
     21 };
     22 const float S2::S2sc = 0; // expected-note 2 {{'S2sc' defined here}}
     23 S2 b;                     // expected-note 2 {{'b' defined here}}
     24 const S2 ba[5];           // expected-note 2 {{'ba' defined here}}
     25 class S3 {
     26   int a;
     27 
     28 public:
     29   S3() : a(0) {}
     30   S3(const S3 &s3) : a(s3.a) {}
     31   S3 operator+=(const S3 &arg1) { return arg1; }
     32 };
     33 int operator+=(const S3 &arg1, const S3 &arg2) { return 5; }
     34 S3 c;               // expected-note 2 {{'c' defined here}}
     35 const S3 ca[5];     // expected-note 2 {{'ca' defined here}}
     36 extern const int f; // expected-note 4 {{'f' declared here}}
     37 class S4 {          // expected-note {{'S4' declared here}}
     38   int a;
     39   S4();
     40   S4(const S4 &s4);
     41   S4 &operator+=(const S4 &arg) { return (*this); }
     42 
     43 public:
     44   S4(int v) : a(v) {}
     45 };
     46 S4 &operator&=(S4 &arg1, S4 &arg2) { return arg1; }
     47 class S5 {
     48   int a;
     49   S5() : a(0) {}
     50   S5(const S5 &s5) : a(s5.a) {}
     51   S5 &operator+=(const S5 &arg);
     52 
     53 public:
     54   S5(int v) : a(v) {}
     55 };
     56 class S6 {
     57   int a;
     58 
     59 public:
     60   S6() : a(6) {}
     61   operator int() { return 6; }
     62 } o; // expected-note 2 {{'o' defined here}}
     63 
     64 S3 h, k;
     65 #pragma omp threadprivate(h) // expected-note 2 {{defined as threadprivate or thread local}}
     66 
     67 template <class T>       // expected-note {{declared here}}
     68 T tmain(T argc) {        // expected-note 2 {{'argc' defined here}}
     69   const T d = T();       // expected-note 4 {{'d' defined here}}
     70   const T da[5] = {T()}; // expected-note 2 {{'da' defined here}}
     71   T qa[5] = {T()};
     72   T i;
     73   T &j = i;                // expected-note 4 {{'j' defined here}}
     74   S3 &p = k;               // expected-note 2 {{'p' defined here}}
     75   const T &r = da[(int)i]; // expected-note 2 {{'r' defined here}}
     76   T &q = qa[(int)i];       // expected-note 2 {{'q' defined here}}
     77   T fl;                    // expected-note {{'fl' defined here}}
     78 #pragma omp parallel
     79 #pragma omp sections reduction // expected-error {{expected '(' after 'reduction'}}
     80   {
     81     foo();
     82   }
     83 #pragma omp parallel
     84 #pragma omp sections reduction + // expected-error {{expected '(' after 'reduction'}} expected-warning {{extra tokens at the end of '#pragma omp sections' are ignored}}
     85   {
     86     foo();
     87   }
     88 #pragma omp parallel
     89 #pragma omp sections reduction( // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected ')'}} expected-note {{to match this '('}}
     90   {
     91     foo();
     92   }
     93 #pragma omp parallel
     94 #pragma omp sections reduction(- // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
     95   {
     96     foo();
     97   }
     98 #pragma omp parallel
     99 #pragma omp sections reduction() // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
    100   {
    101     foo();
    102   }
    103 #pragma omp parallel
    104 #pragma omp sections reduction(*) // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}}
    105   {
    106     foo();
    107   }
    108 #pragma omp parallel
    109 #pragma omp sections reduction(\) // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
    110   {
    111     foo();
    112   }
    113 #pragma omp parallel
    114 #pragma omp sections reduction(& : argc // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{variable of type 'float' is not valid for specified reduction operation}}
    115   {
    116     foo();
    117   }
    118 #pragma omp parallel
    119 #pragma omp sections reduction(| : argc, // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{variable of type 'float' is not valid for specified reduction operation}}
    120   {
    121     foo();
    122   }
    123 #pragma omp parallel
    124 #pragma omp sections reduction(|| : argc ? i : argc) // expected-error 2 {{expected variable name}}
    125   {
    126     foo();
    127   }
    128 #pragma omp parallel
    129 #pragma omp sections reduction(foo : argc) //expected-error {{incorrect reduction identifier, expected one of '+', '-', '*', '&', '|', '^', '&&', '||', 'min' or 'max'}}
    130   {
    131     foo();
    132   }
    133 #pragma omp parallel
    134 #pragma omp sections reduction(&& : argc)
    135   {
    136     foo();
    137   }
    138 #pragma omp parallel
    139 #pragma omp sections reduction(^ : T) // expected-error {{'T' does not refer to a value}}
    140   {
    141     foo();
    142   }
    143 #pragma omp parallel
    144 #pragma omp sections reduction(+ : a, b, c, d, f) // expected-error {{reduction variable with incomplete type 'S1'}} expected-error 3 {{const-qualified variable cannot be reduction}}
    145   {
    146     foo();
    147   }
    148 #pragma omp parallel
    149 #pragma omp sections reduction(min : a, b, c, d, f) // expected-error {{reduction variable with incomplete type 'S1'}} expected-error 2 {{arguments of OpenMP clause 'reduction' for 'min' or 'max' must be of arithmetic type}} expected-error 3 {{const-qualified variable cannot be reduction}}
    150   {
    151     foo();
    152   }
    153 #pragma omp parallel
    154 #pragma omp sections reduction(max : qa[1]) // expected-error 2 {{expected variable name}}
    155   {
    156     foo();
    157   }
    158 #pragma omp parallel
    159 #pragma omp sections reduction(+ : ba) // expected-error {{a reduction variable with array type 'const S2 [5]'}}
    160   {
    161     foo();
    162   }
    163 #pragma omp parallel
    164 #pragma omp sections reduction(* : ca) // expected-error {{a reduction variable with array type 'const S3 [5]'}}
    165   {
    166     foo();
    167   }
    168 #pragma omp parallel
    169 #pragma omp sections reduction(- : da) // expected-error {{a reduction variable with array type 'const int [5]'}} expected-error {{a reduction variable with array type 'const float [5]'}}
    170   {
    171     foo();
    172   }
    173 #pragma omp parallel
    174 #pragma omp sections reduction(^ : fl) // expected-error {{variable of type 'float' is not valid for specified reduction operation}}
    175   {
    176     foo();
    177   }
    178 #pragma omp parallel
    179 #pragma omp sections reduction(&& : S2::S2s) // expected-error {{shared variable cannot be reduction}}
    180   {
    181     foo();
    182   }
    183 #pragma omp parallel
    184 #pragma omp sections reduction(&& : S2::S2sc) // expected-error {{const-qualified variable cannot be reduction}}
    185   {
    186     foo();
    187   }
    188 #pragma omp parallel
    189 #pragma omp sections reduction(+ : h, k) // expected-error {{threadprivate or thread local variable cannot be reduction}}
    190   {
    191     foo();
    192   }
    193 #pragma omp parallel
    194 #pragma omp sections reduction(+ : o) // expected-error {{variable of type 'class S6' is not valid for specified reduction operation}}
    195   {
    196     foo();
    197   }
    198 #pragma omp parallel
    199 #pragma omp sections private(i), reduction(+ : j), reduction(+ : q) // expected-error 4 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    200   {
    201     foo();
    202   }
    203 #pragma omp parallel private(k)
    204 #pragma omp sections reduction(+ : p), reduction(+ : p) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    205   {
    206     foo();
    207   }
    208 #pragma omp parallel
    209 #pragma omp sections reduction(+ : p), reduction(+ : p) // expected-error 3 {{variable can appear only once in OpenMP 'reduction' clause}} expected-note 3 {{previously referenced here}}
    210   {
    211     foo();
    212   }
    213 #pragma omp parallel
    214 #pragma omp sections reduction(+ : r) // expected-error 2 {{const-qualified variable cannot be reduction}}
    215   {
    216     foo();
    217   }
    218 #pragma omp parallel shared(i)
    219 #pragma omp parallel reduction(min : i)
    220 #pragma omp sections reduction(max : j) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    221   {
    222     foo();
    223   }
    224 #pragma omp parallel private(fl)       // expected-note 2 {{defined as private}}
    225 #pragma omp sections reduction(+ : fl) // expected-error 2 {{reduction variable must be shared}}
    226   {
    227     foo();
    228   }
    229 #pragma omp parallel reduction(* : fl) // expected-note 2 {{defined as reduction}}
    230 #pragma omp sections reduction(+ : fl) // expected-error 2 {{reduction variable must be shared}}
    231   {
    232     foo();
    233   }
    234 
    235   return T();
    236 }
    237 
    238 int main(int argc, char **argv) {
    239   const int d = 5;       // expected-note 2 {{'d' defined here}}
    240   const int da[5] = {0}; // expected-note {{'da' defined here}}
    241   int qa[5] = {0};
    242   S4 e(4); // expected-note {{'e' defined here}}
    243   S5 g(5); // expected-note {{'g' defined here}}
    244   int i;
    245   int &j = i;           // expected-note 2 {{'j' defined here}}
    246   S3 &p = k;            // expected-note 2 {{'p' defined here}}
    247   const int &r = da[i]; // expected-note {{'r' defined here}}
    248   int &q = qa[i];       // expected-note {{'q' defined here}}
    249   float fl;             // expected-note {{'fl' defined here}}
    250 #pragma omp parallel
    251 #pragma omp sections reduction // expected-error {{expected '(' after 'reduction'}}
    252   {
    253     foo();
    254   }
    255 #pragma omp parallel
    256 #pragma omp sections reduction + // expected-error {{expected '(' after 'reduction'}} expected-warning {{extra tokens at the end of '#pragma omp sections' are ignored}}
    257   {
    258     foo();
    259   }
    260 #pragma omp parallel
    261 #pragma omp sections reduction( // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected ')'}} expected-note {{to match this '('}}
    262   {
    263     foo();
    264   }
    265 #pragma omp parallel
    266 #pragma omp sections reduction(- // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
    267   {
    268     foo();
    269   }
    270 #pragma omp parallel
    271 #pragma omp sections reduction() // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
    272   {
    273     foo();
    274   }
    275 #pragma omp parallel
    276 #pragma omp sections reduction(*) // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}}
    277   {
    278     foo();
    279   }
    280 #pragma omp parallel
    281 #pragma omp sections reduction(\) // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
    282   {
    283     foo();
    284   }
    285 #pragma omp parallel
    286 #pragma omp sections reduction(foo : argc // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{incorrect reduction identifier, expected one of '+', '-', '*', '&', '|', '^', '&&', '||', 'min' or 'max'}}
    287   {
    288     foo();
    289   }
    290 #pragma omp parallel
    291 #pragma omp sections reduction(| : argc, // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
    292   {
    293     foo();
    294   }
    295 #pragma omp parallel
    296 #pragma omp sections reduction(|| : argc > 0 ? argv[1] : argv[2]) // expected-error {{expected variable name}}
    297   {
    298     foo();
    299   }
    300 #pragma omp parallel
    301 #pragma omp sections reduction(~ : argc) // expected-error {{expected unqualified-id}}
    302   {
    303     foo();
    304   }
    305 #pragma omp parallel
    306 #pragma omp sections reduction(&& : argc)
    307   {
    308     foo();
    309   }
    310 #pragma omp parallel
    311 #pragma omp sections reduction(^ : S1) // expected-error {{'S1' does not refer to a value}}
    312   {
    313     foo();
    314   }
    315 #pragma omp parallel
    316 #pragma omp sections reduction(+ : a, b, c, d, f) // expected-error {{reduction variable with incomplete type 'S1'}} expected-error 2 {{const-qualified variable cannot be reduction}}
    317   {
    318     foo();
    319   }
    320 #pragma omp parallel
    321 #pragma omp sections reduction(min : a, b, c, d, f) // expected-error {{reduction variable 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}}
    322   {
    323     foo();
    324   }
    325 #pragma omp parallel
    326 #pragma omp sections reduction(max : argv[1]) // expected-error {{expected variable name}}
    327   {
    328     foo();
    329   }
    330 #pragma omp parallel
    331 #pragma omp sections reduction(+ : ba) // expected-error {{a reduction variable with array type 'const S2 [5]'}}
    332   {
    333     foo();
    334   }
    335 #pragma omp parallel
    336 #pragma omp sections reduction(* : ca) // expected-error {{a reduction variable with array type 'const S3 [5]'}}
    337   {
    338     foo();
    339   }
    340 #pragma omp parallel
    341 #pragma omp sections reduction(- : da) // expected-error {{a reduction variable with array type 'const int [5]'}}
    342   {
    343     foo();
    344   }
    345 #pragma omp parallel
    346 #pragma omp sections reduction(^ : fl) // expected-error {{variable of type 'float' is not valid for specified reduction operation}}
    347   {
    348     foo();
    349   }
    350 #pragma omp parallel
    351 #pragma omp sections reduction(&& : S2::S2s) // expected-error {{shared variable cannot be reduction}}
    352   {
    353     foo();
    354   }
    355 #pragma omp parallel
    356 #pragma omp sections reduction(&& : S2::S2sc) // expected-error {{const-qualified variable cannot be reduction}}
    357   {
    358     foo();
    359   }
    360 #pragma omp parallel
    361 #pragma omp sections reduction(& : e, g) // expected-error {{reduction variable must have an accessible, unambiguous default constructor}} expected-error {{variable of type 'S5' is not valid for specified reduction operation}}
    362   {
    363     foo();
    364   }
    365 #pragma omp parallel
    366 #pragma omp sections reduction(+ : h, k) // expected-error {{threadprivate or thread local variable cannot be reduction}}
    367   {
    368     foo();
    369   }
    370 #pragma omp parallel
    371 #pragma omp sections reduction(+ : o) // expected-error {{variable of type 'class S6' is not valid for specified reduction operation}}
    372   {
    373     foo();
    374   }
    375 #pragma omp parallel
    376 #pragma omp sections private(i), reduction(+ : j), reduction(+ : q) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    377   {
    378     foo();
    379   }
    380 #pragma omp parallel private(k)
    381 #pragma omp sections reduction(+ : p), reduction(+ : p) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    382   {
    383     foo();
    384   }
    385 #pragma omp parallel
    386 #pragma omp sections reduction(+ : p), reduction(+ : p) // expected-error {{variable can appear only once in OpenMP 'reduction' clause}} expected-note {{previously referenced here}}
    387   {
    388     foo();
    389   }
    390 #pragma omp parallel
    391 #pragma omp sections reduction(+ : r) // expected-error {{const-qualified variable cannot be reduction}}
    392   {
    393     foo();
    394   }
    395 #pragma omp parallel shared(i)
    396 #pragma omp parallel reduction(min : i)
    397 #pragma omp sections reduction(max : j) // expected-error {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    398   {
    399     foo();
    400   }
    401 #pragma omp parallel private(fl)       // expected-note {{defined as private}}
    402 #pragma omp sections reduction(+ : fl) // expected-error {{reduction variable must be shared}}
    403   {
    404     foo();
    405   }
    406 #pragma omp parallel reduction(* : fl) // expected-note {{defined as reduction}}
    407 #pragma omp sections reduction(+ : fl) // expected-error {{reduction variable must be shared}}
    408   {
    409     foo();
    410   }
    411 
    412   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}}
    413 }
    414