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      1 // RUN: %clang_cc1 -verify -fopenmp=libiomp5 %s
      2 
      3 void foo() {
      4 }
      5 
      6 bool foobool(int argc) {
      7   return argc;
      8 }
      9 
     10 struct S1; // expected-note {{declared here}}
     11 
     12 template <class T, typename S, int N, int ST> // expected-note {{declared here}}
     13 T tmain(T argc, S **argv) { //expected-note 2 {{declared here}}
     14   #pragma omp parallel for collapse // expected-error {{expected '(' after 'collapse'}}
     15   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     16   #pragma omp parallel for collapse ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
     17   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     18   #pragma omp parallel for collapse () // expected-error {{expected expression}}
     19   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     20   // expected-error@+3 {{expected ')'}} expected-note@+3 {{to match this '('}}
     21   // expected-error@+2 2 {{expression is not an integral constant expression}}
     22   // expected-note@+1 2 {{read of non-const variable 'argc' is not allowed in a constant expression}}
     23   #pragma omp parallel for collapse (argc
     24   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     25   // expected-error@+1 2 {{argument to 'collapse' clause must be a positive integer value}}
     26   #pragma omp parallel for collapse (ST // expected-error {{expected ')'}} expected-note {{to match this '('}}
     27   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     28   #pragma omp parallel for collapse (1)) // expected-warning {{extra tokens at the end of '#pragma omp parallel for' are ignored}}
     29   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     30   #pragma omp parallel for collapse ((ST > 0) ? 1 + ST : 2) // expected-note 2 {{as specified in 'collapse' clause}}
     31   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 parallel for', but found only 1}}
     32   // expected-error@+3 2 {{directive '#pragma omp parallel for' cannot contain more than one 'collapse' clause}}
     33   // expected-error@+2 2 {{argument to 'collapse' clause must be a positive integer value}}
     34   // expected-error@+1 2 {{expression is not an integral constant expression}}
     35   #pragma omp parallel for collapse (foobool(argc)), collapse (true), collapse (-5)
     36   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     37   #pragma omp parallel for collapse (S) // expected-error {{'S' does not refer to a value}}
     38   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     39   // expected-error@+1 2 {{expression is not an integral constant expression}}
     40   #pragma omp parallel for collapse (argv[1]=2) // expected-error {{expected ')'}} expected-note {{to match this '('}}
     41   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     42   #pragma omp parallel for collapse (1)
     43   for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     44   #pragma omp parallel for collapse (N) // expected-error {{argument to 'collapse' clause must be a positive integer value}}
     45   for (T i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
     46   #pragma omp parallel for collapse (2) // expected-note {{as specified in 'collapse' clause}}
     47   foo(); // expected-error {{expected 2 for loops after '#pragma omp parallel for'}}
     48   return argc;
     49 }
     50 
     51 int main(int argc, char **argv) {
     52   #pragma omp parallel for collapse // expected-error {{expected '(' after 'collapse'}}
     53   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     54   #pragma omp parallel for collapse ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
     55   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     56   #pragma omp parallel for collapse () // expected-error {{expected expression}}
     57   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     58   #pragma omp parallel for collapse (4 // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-note {{as specified in 'collapse' clause}}
     59   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 parallel for', but found only 1}}
     60   #pragma omp parallel for collapse (2+2)) // expected-warning {{extra tokens at the end of '#pragma omp parallel for' are ignored}}  expected-note {{as specified in 'collapse' clause}}
     61   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 parallel for', but found only 1}}
     62   #pragma omp parallel for collapse (foobool(1) > 0 ? 1 : 2) // expected-error {{expression is not an integral constant expression}}
     63   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     64   // expected-error@+3 {{expression is not an integral constant expression}}
     65   // expected-error@+2 2 {{directive '#pragma omp parallel for' cannot contain more than one 'collapse' clause}}
     66   // expected-error@+1 2 {{argument to 'collapse' clause must be a positive integer value}}
     67   #pragma omp parallel for collapse (foobool(argc)), collapse (true), collapse (-5)
     68   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     69   #pragma omp parallel for collapse (S1) // expected-error {{'S1' does not refer to a value}}
     70   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     71   // expected-error@+1 {{expression is not an integral constant expression}}
     72   #pragma omp parallel for collapse (argv[1]=2) // expected-error {{expected ')'}} expected-note {{to match this '('}}
     73   for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
     74   // expected-error@+3 {{statement after '#pragma omp parallel for' must be a for loop}}
     75   // expected-note@+1 {{in instantiation of function template specialization 'tmain<int, char, -1, -2>' requested here}}
     76   #pragma omp parallel for collapse(collapse(tmain<int, char, -1, -2>(argc, argv) // expected-error 2 {{expected ')'}} expected-note 2 {{to match this '('}}
     77   foo();
     78   #pragma omp parallel for collapse (2) // expected-note {{as specified in 'collapse' clause}}
     79   foo(); // expected-error {{expected 2 for loops after '#pragma omp parallel for'}}
     80   // expected-note@+1 {{in instantiation of function template specialization 'tmain<int, char, 1, 0>' requested here}}
     81   return tmain<int, char, 1, 0>(argc, argv);
     82 }
     83 
     84