clang/test/OpenMP/parallel_for_simd_messages.cpp

   1 // RUN: %clang_cc1 -verify -fopenmp -std=c++11 -o - %s -Wuninitialized
   2
   3 // RUN: %clang_cc1 -verify -fopenmp-simd -std=c++11 -o - %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 for simd
   8   for (int i = 0; i < 10; ++i)
   9     argc = x; // expected-warning {{variable 'x' is uninitialized when used here}}
  10 }
  11
  12 void foo() {
  13 }
  14
  15 #pragma omp parallel for simd // expected-error {{unexpected OpenMP directive '#pragma omp parallel for simd'}}
  16
  17 int main(int argc, char **argv) {
  18 #pragma omp parallel for simd { // expected-warning {{extra tokens at the end of '#pragma omp parallel for simd' are ignored}}
  19   for (int i = 0; i < argc; ++i)
  20     foo();
  21 #pragma omp parallel for simd ( // expected-warning {{extra tokens at the end of '#pragma omp parallel for simd' are ignored}}
  22   for (int i = 0; i < argc; ++i)
  23     foo();
  24 #pragma omp parallel for simd[ // expected-warning {{extra tokens at the end of '#pragma omp parallel for simd' are ignored}}
  25   for (int i = 0; i < argc; ++i)
  26     foo();
  27 #pragma omp parallel for simd] // expected-warning {{extra tokens at the end of '#pragma omp parallel for simd' are ignored}}
  28   for (int i = 0; i < argc; ++i)
  29     foo();
  30 #pragma omp parallel for simd) // expected-warning {{extra tokens at the end of '#pragma omp parallel for simd' are ignored}}
  31   for (int i = 0; i < argc; ++i)
  32     foo();
  33 #pragma omp parallel for simd } // expected-warning {{extra tokens at the end of '#pragma omp parallel for simd' are ignored}}
  34   for (int i = 0; i < argc; ++i)
  35     foo();
  36 #pragma omp parallel for simd
  37   for (int i = 0; i < argc; ++i)
  38     foo();
  39 // expected-warning@+1 {{extra tokens at the end of '#pragma omp parallel for simd' are ignored}}
  40 #pragma omp parallel for simd unknown()
  41   for (int i = 0; i < argc; ++i)
  42     foo();
  43 L1:
  44   for (int i = 0; i < argc; ++i)
  45     foo();
  46 #pragma omp parallel for simd
  47   for (int i = 0; i < argc; ++i)
  48     foo();
  49 #pragma omp parallel for simd
  50   for (int i = 0; i < argc; ++i) {
  51     goto L1; // expected-error {{use of undeclared label 'L1'}}
  52     argc++;
  53   }
  54
  55   for (int i = 0; i < 10; ++i) {
  56     switch (argc) {
  57     case (0):
  58 #pragma omp parallel for simd
  59       for (int i = 0; i < argc; ++i) {
  60         foo();
  61         break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
  62         continue;
  63       }
  64     default:
  65       break;
  66     }
  67   }
  68 #pragma omp parallel for simd default(none) // expected-note {{explicit data sharing attribute requested here}}
  69   for (int i = 0; i < 10; ++i)
  70     ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
  71
  72   goto L2; // expected-error {{use of undeclared label 'L2'}}
  73 #pragma omp parallel for simd
  74   for (int i = 0; i < argc; ++i)
  75   L2:
  76   foo();
  77 #pragma omp parallel for simd
  78   for (int i = 0; i < argc; ++i) {
  79     return 1; // expected-error {{cannot return from OpenMP region}}
  80   }
  81
  82   [[]] // expected-error {{an attribute list cannot appear here}}
  83 #pragma omp parallel for simd
  84       for (int n = 0; n < 100; ++n) {
  85   }
  86
  87   return 0;
  88 }
  89
  90 void test_ordered() {
  91 #pragma omp parallel for simd ordered ordered // expected-error {{directive '#pragma omp parallel for simd' cannot contain more than one 'ordered' clause}}
  92   for (int i = 0; i < 16; ++i)
  93     ;
  94 #pragma omp parallel for simd ordered
  95   for (int i = 0; i < 16; ++i)
  96     ;
  97 // expected-error@+1 {{'ordered' clause with a parameter cannot be specified in '#pragma omp parallel for simd' directive}}
  98 #pragma omp parallel for simd ordered(1)
  99   for (int i = 0; i < 16; ++i)
 100     ;
 101 }
 102