clang/test/OpenMP/parallel_master_message.cpp

   1 // RUN: %clang_cc1 -verify -fopenmp %s -Wuninitialized
   2
   3 // RUN: %clang_cc1 -verify -fopenmp-simd %s -Wuninitialized
   4
   5 void xxx(int argc) {
   6   int x; // expected-note {{initialize the variable 'x' to silence this warning}}
   7 #pragma omp parallel master
   8   argc = x; // expected-warning {{variable 'x' is uninitialized when used here}}
   9 }
  10
  11 #pragma omp parallel master // expected-error {{unexpected OpenMP directive '#pragma omp parallel master'}}
  12
  13 int foo() {
  14   return 0;
  15 }
  16
  17 int a;
  18 struct S;
  19 S& bar();
  20 int main(int argc, char **argv) {
  21   #pragma omp parallel master nowait // expected-error {{unexpected OpenMP clause 'nowait' in directive '#pragma omp parallel master'}}
  22   #pragma omp parallel master unknown // expected-warning {{extra tokens at the end of '#pragma omp parallel master' are ignored}}
  23   foo();
  24   {
  25     #pragma omp master
  26   } // expected-error {{expected statement}}
  27   {
  28     #pragma omp parallel master
  29   } // expected-error {{expected statement}}
  30
  31   S &s = bar();
  32   #pragma omp parallel master
  33   (void)&s;
  34   #pragma omp parallel master { // expected-warning {{extra tokens at the end of '#pragma omp parallel master' are ignored}}
  35   foo();
  36   #pragma omp parallel master ( // expected-warning {{extra tokens at the end of '#pragma omp parallel master' are ignored}}
  37   foo();
  38   #pragma omp parallel master [ // expected-warning {{extra tokens at the end of '#pragma omp parallel master' are ignored}}
  39   foo();
  40   #pragma omp parallel master ] // expected-warning {{extra tokens at the end of '#pragma omp parallel master' are ignored}}
  41   foo();
  42   #pragma omp parallel master ) // expected-warning {{extra tokens at the end of '#pragma omp parallel master' are ignored}}
  43   foo();
  44   #pragma omp parallel master } // expected-warning {{extra tokens at the end of '#pragma omp parallel master' are ignored}}
  45   foo();
  46   #pragma omp parallel master
  47   // expected-warning@+1 {{extra tokens at the end of '#pragma omp parallel master' are ignored}}
  48   #pragma omp parallel master unknown()
  49   foo();
  50   L1:
  51     foo();
  52   #pragma omp parallel master
  53   ;
  54   #pragma omp parallel master
  55   {
  56
  57   for (int i = 0; i < 10; ++i) {
  58     switch(argc) {
  59      case (0):
  60       #pragma omp parallel master
  61       {
  62         foo();
  63         break; // expected-error {{'break' statement not in loop or switch statement}}
  64         continue; // expected-error {{'continue' statement not in loop statement}}
  65       }
  66       default:
  67        break;
  68     }
  69   }
  70     goto L1; // expected-error {{use of undeclared label 'L1'}}
  71     argc++;
  72   }
  73 #pragma omp parallel master default(none) // expected-note 2 {{explicit data sharing attribute requested here}}
  74   {
  75     ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
  76     ++a;    // expected-error {{variable 'a' must have explicitly specified data sharing attributes}}
  77   }
  78
  79   goto L2; // expected-error {{use of undeclared label 'L2'}}
  80   #pragma omp parallel master
  81   L2:
  82   foo();
  83   #pragma omp parallel master
  84   {
  85     return 1; // expected-error {{cannot return from OpenMP region}}
  86   }
  87   return 0;
  88 }