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      1 // RUN: %clang_cc1 -verify -fopenmp %s
      2 // RUN: %clang_cc1 -verify -fopenmp -std=c++98 %s
      3 // RUN: %clang_cc1 -verify -fopenmp -std=c++11 %s
      4 
      5 void foo() {
      6 }
      7 
      8 #if __cplusplus >= 201103L
      9 // expected-note@+2 4 {{declared here}}
     10 #endif
     11 bool foobool(int argc) {
     12   return argc;
     13 }
     14 
     15 struct S1; // expected-note {{declared here}}
     16 
     17 template <class T, typename S, int N, int ST> // expected-note {{declared here}}
     18 T tmain(T argc, S **argv) { //expected-note 2 {{declared here}}
     19   #pragma omp for collapse // expected-error {{expected '(' after 'collapse'}}
     20   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     21   #pragma omp for collapse ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
     22   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     23   #pragma omp for collapse () // expected-error {{expected expression}}
     24   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     25   // expected-error@+3 {{expected ')'}} expected-note@+3 {{to match this '('}}
     26   // expected-error@+2 2 {{expression is not an integral constant expression}}
     27   // expected-note@+1 2 {{read of non-const variable 'argc' is not allowed in a constant expression}}
     28   #pragma omp for collapse (argc
     29   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     30   // expected-error@+1 2 {{argument to 'collapse' clause must be a strictly positive integer value}}
     31   #pragma omp for collapse (ST // expected-error {{expected ')'}} expected-note {{to match this '('}}
     32   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     33   #pragma omp for collapse (1)) // expected-warning {{extra tokens at the end of '#pragma omp for' are ignored}}
     34   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     35   #pragma omp for collapse ((ST > 0) ? 1 + ST : 2) // expected-note 2 {{as specified in 'collapse' clause}}
     36   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST]; // expected-error 2 {{expected 2 for loops after '#pragma omp for', but found only 1}}
     37   // expected-error@+6 2 {{directive '#pragma omp for' cannot contain more than one 'collapse' clause}}
     38   // expected-error@+5 2 {{argument to 'collapse' clause must be a strictly positive integer value}}
     39   // expected-error@+4 2 {{expression is not an integral constant expression}}
     40 #if __cplusplus >= 201103L
     41   // expected-note@+2 2 {{non-constexpr function 'foobool' cannot be used in a constant expression}}
     42 #endif
     43   #pragma omp for collapse (foobool(argc)), collapse (true), collapse (-5)
     44   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     45   #pragma omp for collapse (S) // expected-error {{'S' does not refer to a value}}
     46   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     47 #if __cplusplus <= 199711L
     48   // expected-error@+4 2 {{expression is not an integral constant expression}}
     49 #else
     50   // expected-error@+2 2 {{integral constant expression must have integral or unscoped enumeration type, not 'char *'}}
     51 #endif
     52   #pragma omp for collapse (argv[1]=2) // expected-error {{expected ')'}} expected-note {{to match this '('}}
     53   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     54   #pragma omp for collapse (1)
     55   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     56   #pragma omp for collapse (N) // expected-error {{argument to 'collapse' clause must be a strictly positive integer value}}
     57   for (T i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     58   #pragma omp for collapse (2) // expected-note {{as specified in 'collapse' clause}}
     59   foo(); // expected-error {{expected 2 for loops after '#pragma omp for'}}
     60   return argc;
     61 }
     62 
     63 int main(int argc, char **argv) {
     64   #pragma omp for collapse // expected-error {{expected '(' after 'collapse'}}
     65   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     66   #pragma omp for collapse ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
     67   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     68   #pragma omp for collapse () // expected-error {{expected expression}}
     69   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     70   #pragma omp for collapse (4 // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-note {{as specified in 'collapse' clause}}
     71   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4]; // expected-error {{expected 4 for loops after '#pragma omp for', but found only 1}}
     72   #pragma omp for collapse (2+2)) // expected-warning {{extra tokens at the end of '#pragma omp for' are ignored}}  expected-note {{as specified in 'collapse' clause}}
     73   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4]; // expected-error {{expected 4 for loops after '#pragma omp for', but found only 1}}
     74   // expected-error@+4 {{expression is not an integral constant expression}}
     75 #if __cplusplus >= 201103L
     76   // expected-note@+2 {{non-constexpr function 'foobool' cannot be used in a constant expression}}
     77 #endif
     78   #pragma omp for collapse (foobool(1) > 0 ? 1 : 2)
     79   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     80   // expected-error@+6 {{expression is not an integral constant expression}}
     81 #if __cplusplus >= 201103L
     82   // expected-note@+4 {{non-constexpr function 'foobool' cannot be used in a constant expression}}
     83 #endif
     84   // expected-error@+2 2 {{directive '#pragma omp for' cannot contain more than one 'collapse' clause}}
     85   // expected-error@+1 2 {{argument to 'collapse' clause must be a strictly positive integer value}}
     86   #pragma omp for collapse (foobool(argc)), collapse (true), collapse (-5)
     87   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     88   #pragma omp for collapse (S1) // expected-error {{'S1' does not refer to a value}}
     89   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     90 #if __cplusplus <= 199711L
     91   // expected-error@+4 {{expression is not an integral constant expression}}
     92 #else
     93   // expected-error@+2 {{integral constant expression must have integral or unscoped enumeration type, not 'char *'}}
     94 #endif
     95   #pragma omp for collapse (argv[1]=2) // expected-error {{expected ')'}} expected-note {{to match this '('}}
     96   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     97   // expected-error@+3 {{statement after '#pragma omp for' must be a for loop}}
     98   // expected-note@+1 {{in instantiation of function template specialization 'tmain<int, char, -1, -2>' requested here}}
     99   #pragma omp for collapse(collapse(tmain<int, char, -1, -2>(argc, argv) // expected-error 2 {{expected ')'}} expected-note 2 {{to match this '('}}
    100   foo();
    101   #pragma omp for collapse (2) // expected-note {{as specified in 'collapse' clause}}
    102   foo(); // expected-error {{expected 2 for loops after '#pragma omp for'}}
    103   // expected-note@+1 {{in instantiation of function template specialization 'tmain<int, char, 1, 0>' requested here}}
    104   return tmain<int, char, 1, 0>(argc, argv);
    105 }
    106 
    107