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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 sections reduction // expected-error {{expected '(' after 'reduction'}}
     79   {
     80     foo();
     81   }
     82 #pragma omp parallel sections reduction + // expected-error {{expected '(' after 'reduction'}} expected-warning {{extra tokens at the end of '#pragma omp parallel sections' are ignored}}
     83   {
     84     foo();
     85   }
     86 #pragma omp parallel sections reduction( // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected ')'}} expected-note {{to match this '('}}
     87   {
     88     foo();
     89   }
     90 #pragma omp parallel sections reduction(- // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
     91   {
     92     foo();
     93   }
     94 #pragma omp parallel sections reduction() // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
     95   {
     96     foo();
     97   }
     98 #pragma omp parallel sections reduction(*) // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}}
     99   {
    100     foo();
    101   }
    102 #pragma omp parallel sections reduction(\) // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
    103   {
    104     foo();
    105   }
    106 #pragma omp parallel sections reduction(& : argc // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{variable of type 'float' is not valid for specified reduction operation}}
    107   {
    108     foo();
    109   }
    110 #pragma omp parallel 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}}
    111   {
    112     foo();
    113   }
    114 #pragma omp parallel sections reduction(|| : argc ? i : argc) // expected-error 2 {{expected variable name}}
    115   {
    116     foo();
    117   }
    118 #pragma omp parallel sections reduction(foo : argc) //expected-error {{incorrect reduction identifier, expected one of '+', '-', '*', '&', '|', '^', '&&', '||', 'min' or 'max'}}
    119   {
    120     foo();
    121   }
    122 #pragma omp parallel sections reduction(&& : argc)
    123   {
    124     foo();
    125   }
    126 #pragma omp parallel sections reduction(^ : T) // expected-error {{'T' does not refer to a value}}
    127   {
    128     foo();
    129   }
    130 #pragma omp parallel sections reduction(+ : a, b, c, d, f) // expected-error {{reduction variable with incomplete type 'S1'}} expected-error 3 {{const-qualified variable cannot be reduction}}
    131   {
    132     foo();
    133   }
    134 #pragma omp parallel 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}}
    135   {
    136     foo();
    137   }
    138 #pragma omp parallel sections reduction(max : qa[1]) // expected-error 2 {{expected variable name}}
    139   {
    140     foo();
    141   }
    142 #pragma omp parallel sections reduction(+ : ba) // expected-error {{a reduction variable with array type 'const S2 [5]'}}
    143   {
    144     foo();
    145   }
    146 #pragma omp parallel sections reduction(* : ca) // expected-error {{a reduction variable with array type 'const S3 [5]'}}
    147   {
    148     foo();
    149   }
    150 #pragma omp parallel 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]'}}
    151   {
    152     foo();
    153   }
    154 #pragma omp parallel sections reduction(^ : fl) // expected-error {{variable of type 'float' is not valid for specified reduction operation}}
    155   {
    156     foo();
    157   }
    158 #pragma omp parallel sections reduction(&& : S2::S2s) // expected-error {{shared variable cannot be reduction}}
    159   {
    160     foo();
    161   }
    162 #pragma omp parallel sections reduction(&& : S2::S2sc) // expected-error {{const-qualified variable cannot be reduction}}
    163   {
    164     foo();
    165   }
    166 #pragma omp parallel sections reduction(+ : h, k) // expected-error {{threadprivate or thread local variable cannot be reduction}}
    167   {
    168     foo();
    169   }
    170 #pragma omp parallel sections reduction(+ : o) // expected-error {{variable of type 'class S6' is not valid for specified reduction operation}}
    171   {
    172     foo();
    173   }
    174 #pragma omp parallel sections private(i), reduction(+ : j), reduction(+ : q) // expected-error 4 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    175   {
    176     foo();
    177   }
    178 #pragma omp parallel private(k)
    179 #pragma omp parallel sections reduction(+ : p), reduction(+ : p) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    180   {
    181     foo();
    182   }
    183 #pragma omp parallel sections reduction(+ : p), reduction(+ : p) // expected-error 3 {{variable can appear only once in OpenMP 'reduction' clause}} expected-note 3 {{previously referenced here}}
    184   {
    185     foo();
    186   }
    187 #pragma omp parallel sections reduction(+ : r) // expected-error 2 {{const-qualified variable cannot be reduction}}
    188   {
    189     foo();
    190   }
    191 #pragma omp parallel shared(i)
    192 #pragma omp parallel reduction(min : i)
    193 #pragma omp parallel sections reduction(max : j) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    194   {
    195     foo();
    196   }
    197 #pragma omp parallel private(fl)
    198 #pragma omp parallel sections reduction(+ : fl)
    199   {
    200     foo();
    201   }
    202 #pragma omp parallel reduction(* : fl)
    203 #pragma omp parallel sections reduction(+ : fl)
    204   {
    205     foo();
    206   }
    207 
    208   return T();
    209 }
    210 
    211 int main(int argc, char **argv) {
    212   const int d = 5;       // expected-note 2 {{'d' defined here}}
    213   const int da[5] = {0}; // expected-note {{'da' defined here}}
    214   int qa[5] = {0};
    215   S4 e(4); // expected-note {{'e' defined here}}
    216   S5 g(5); // expected-note {{'g' defined here}}
    217   int i;
    218   int &j = i;                           // expected-note 2 {{'j' defined here}}
    219   S3 &p = k;                            // expected-note 2 {{'p' defined here}}
    220   const int &r = da[i];                 // expected-note {{'r' defined here}}
    221   int &q = qa[i];                       // expected-note {{'q' defined here}}
    222   float fl;                             // expected-note {{'fl' defined here}}
    223 #pragma omp parallel sections reduction // expected-error {{expected '(' after 'reduction'}}
    224   {
    225     foo();
    226   }
    227 #pragma omp parallel sections reduction + // expected-error {{expected '(' after 'reduction'}} expected-warning {{extra tokens at the end of '#pragma omp parallel sections' are ignored}}
    228   {
    229     foo();
    230   }
    231 #pragma omp parallel sections reduction( // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected ')'}} expected-note {{to match this '('}}
    232   {
    233     foo();
    234   }
    235 #pragma omp parallel sections reduction(- // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
    236   {
    237     foo();
    238   }
    239 #pragma omp parallel sections reduction() // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
    240   {
    241     foo();
    242   }
    243 #pragma omp parallel sections reduction(*) // expected-warning {{missing ':' after reduction identifier - ignoring}} expected-error {{expected expression}}
    244   {
    245     foo();
    246   }
    247 #pragma omp parallel sections reduction(\) // expected-error {{expected unqualified-id}} expected-warning {{missing ':' after reduction identifier - ignoring}}
    248   {
    249     foo();
    250   }
    251 #pragma omp parallel sections reduction(foo : argc // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-error {{incorrect reduction identifier, expected one of '+', '-', '*', '&', '|', '^', '&&', '||', 'min' or 'max'}}
    252   {
    253     foo();
    254   }
    255 #pragma omp parallel sections reduction(| : argc, // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
    256   {
    257     foo();
    258   }
    259 #pragma omp parallel sections reduction(|| : argc > 0 ? argv[1] : argv[2]) // expected-error {{expected variable name}}
    260   {
    261     foo();
    262   }
    263 #pragma omp parallel sections reduction(~ : argc) // expected-error {{expected unqualified-id}}
    264   {
    265     foo();
    266   }
    267 #pragma omp parallel sections reduction(&& : argc)
    268   {
    269     foo();
    270   }
    271 #pragma omp parallel sections reduction(^ : S1) // expected-error {{'S1' does not refer to a value}}
    272   {
    273     foo();
    274   }
    275 #pragma omp parallel sections reduction(+ : a, b, c, d, f) // expected-error {{reduction variable with incomplete type 'S1'}} expected-error 2 {{const-qualified variable cannot be reduction}}
    276   {
    277     foo();
    278   }
    279 #pragma omp parallel 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}}
    280   {
    281     foo();
    282   }
    283 #pragma omp parallel sections reduction(max : argv[1]) // expected-error {{expected variable name}}
    284   {
    285     foo();
    286   }
    287 #pragma omp parallel sections reduction(+ : ba) // expected-error {{a reduction variable with array type 'const S2 [5]'}}
    288   {
    289     foo();
    290   }
    291 #pragma omp parallel sections reduction(* : ca) // expected-error {{a reduction variable with array type 'const S3 [5]'}}
    292   {
    293     foo();
    294   }
    295 #pragma omp parallel sections reduction(- : da) // expected-error {{a reduction variable with array type 'const int [5]'}}
    296   {
    297     foo();
    298   }
    299 #pragma omp parallel sections reduction(^ : fl) // expected-error {{variable of type 'float' is not valid for specified reduction operation}}
    300   {
    301     foo();
    302   }
    303 #pragma omp parallel sections reduction(&& : S2::S2s) // expected-error {{shared variable cannot be reduction}}
    304   {
    305     foo();
    306   }
    307 #pragma omp parallel sections reduction(&& : S2::S2sc) // expected-error {{const-qualified variable cannot be reduction}}
    308   {
    309     foo();
    310   }
    311 #pragma omp parallel 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}}
    312   {
    313     foo();
    314   }
    315 #pragma omp parallel sections reduction(+ : h, k) // expected-error {{threadprivate or thread local variable cannot be reduction}}
    316   {
    317     foo();
    318   }
    319 #pragma omp parallel sections reduction(+ : o) // expected-error {{variable of type 'class S6' is not valid for specified reduction operation}}
    320   {
    321     foo();
    322   }
    323 #pragma omp parallel sections private(i), reduction(+ : j), reduction(+ : q) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    324   {
    325     foo();
    326   }
    327 #pragma omp parallel private(k)
    328 #pragma omp parallel sections reduction(+ : p), reduction(+ : p) // expected-error 2 {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    329   {
    330     foo();
    331   }
    332 #pragma omp parallel sections reduction(+ : p), reduction(+ : p) // expected-error {{variable can appear only once in OpenMP 'reduction' clause}} expected-note {{previously referenced here}}
    333   {
    334     foo();
    335   }
    336 #pragma omp parallel sections reduction(+ : r) // expected-error {{const-qualified variable cannot be reduction}}
    337   {
    338     foo();
    339   }
    340 #pragma omp parallel shared(i)
    341 #pragma omp parallel reduction(min : i)
    342 #pragma omp parallel sections reduction(max : j) // expected-error {{argument of OpenMP clause 'reduction' must reference the same object in all threads}}
    343   {
    344     foo();
    345   }
    346 #pragma omp parallel private(fl)
    347 #pragma omp parallel sections reduction(+ : fl)
    348   {
    349     foo();
    350   }
    351 #pragma omp parallel reduction(* : fl)
    352 #pragma omp parallel sections reduction(+ : fl)
    353   {
    354     foo();
    355   }
    356 
    357   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}}
    358 }
    359