// RUN: %clang_cc1 -verify -fopenmp %s -Wuninitialized
// RUN: %clang_cc1 -verify -fopenmp -std=c++98 %s -Wuninitialized
// RUN: %clang_cc1 -verify -fopenmp -std=c++11 %s -Wuninitialized

// RUN: %clang_cc1 -verify -fopenmp-simd %s -Wuninitialized
// RUN: %clang_cc1 -verify -fopenmp-simd -std=c++98 %s -Wuninitialized
// RUN: %clang_cc1 -verify -fopenmp-simd -std=c++11 %s -Wuninitialized

// expected-note@* 0+{{declared here}}

void foo() {
}

bool foobool(int argc) {
  return argc;
}

struct S1;

template <class T, typename S, int N, int ST>
T tmain(T argc, S **argv) {
  #pragma omp simd collapse // expected-error {{expected '(' after 'collapse'}}
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  #pragma omp simd collapse ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  #pragma omp simd collapse () // expected-error {{expected expression}}
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  // expected-error@+2 {{expected ')'}} expected-note@+2 {{to match this '('}}
  // expected-error@+1 2 {{integral constant expression}} expected-note@+1 0+{{constant expression}}
  #pragma omp simd collapse (argc 
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  // expected-error@+1 2 {{argument to 'collapse' clause must be a strictly positive integer value}}
  #pragma omp simd collapse (ST // expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  #pragma omp simd collapse (1)) // expected-warning {{extra tokens at the end of '#pragma omp simd' are ignored}}
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  #pragma omp simd collapse ((ST > 0) ? 1 + ST : 2) // expected-note 2 {{as specified in 'collapse' clause}}
  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 simd', but found only 1}}
  // expected-error@+3 2 {{directive '#pragma omp simd' cannot contain more than one 'collapse' clause}}
  // expected-error@+2 {{argument to 'collapse' clause must be a strictly positive integer value}}
  // expected-error@+1 2 {{integral constant expression}} expected-note@+1 0+{{constant expression}}
  #pragma omp simd collapse (foobool(argc)), collapse (true), collapse (-5)
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  #pragma omp simd collapse (S) // expected-error {{'S' does not refer to a value}}
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  #pragma omp simd collapse (0xFFFFFFFFFFFFFFFF) // expected-error {{argument to 'collapse' clause requires a value that can be represented by a 64-bit}}
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
#if __cplusplus <= 199711L
  // expected-error@+4 2 {{integral constant expression}} expected-note@+4 0+{{constant expression}}
#else
  // expected-error@+2 2 {{integral constant expression must have integral or unscoped enumeration type, not 'char *'}}
#endif
  #pragma omp simd collapse (argv[1]=2) // expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  #pragma omp simd collapse (1)
  for (int i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  #pragma omp simd collapse (N) // expected-error {{argument to 'collapse' clause must be a strictly positive integer value}}
  for (T i = ST; i < N; i++) argv[0][i] = argv[0][i] - argv[0][i-ST];
  #pragma omp simd collapse (2) // expected-note {{as specified in 'collapse' clause}}
  foo(); // expected-error {{expected 2 for loops after '#pragma omp simd'}}
  return argc;
}

int main(int argc, char **argv) {
  #pragma omp simd collapse // expected-error {{expected '(' after 'collapse'}}
  for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
  #pragma omp simd collapse ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
  #pragma omp simd collapse () // expected-error {{expected expression}}
  for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
  #pragma omp simd collapse (4 // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-note {{as specified in 'collapse' clause}}
  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 simd', but found only 1}}
  #pragma omp simd collapse (2+2)) // expected-warning {{extra tokens at the end of '#pragma omp simd' are ignored}} expected-note {{as specified in 'collapse' clause}}
  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 simd', but found only 1}}
  // expected-error@+1 {{integral constant expression}} expected-note@+1 0+{{constant expression}}
  #pragma omp simd collapse (foobool(1) > 0 ? 1 : 2)
  for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
  // expected-error@+3 {{integral constant expression}} expected-note@+3 0+{{constant expression}}
  // expected-error@+2 2 {{directive '#pragma omp simd' cannot contain more than one 'collapse' clause}}
  // expected-error@+1 {{argument to 'collapse' clause must be a strictly positive integer value}}
  #pragma omp simd collapse (foobool(argc)), collapse (true), collapse (-5) 
  for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
  #pragma omp simd collapse (S1) // expected-error {{'S1' does not refer to a value}}
  for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
#if __cplusplus <= 199711L
  // expected-error@+4 {{integral constant expression}} expected-note@+4 0+{{constant expression}}
#else
  // expected-error@+2 {{integral constant expression must have integral or unscoped enumeration type, not 'char *'}}
#endif
  #pragma omp simd collapse (argv[1]=2) // expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int i = 4; i < 12; i++) argv[0][i] = argv[0][i] - argv[0][i-4];
  #pragma omp simd collapse (2) // expected-note {{as specified in 'collapse' clause}}
  foo(); // expected-error {{expected 2 for loops after '#pragma omp simd'}}
  // expected-error@+3 {{statement after '#pragma omp simd' must be a for loop}}
  // expected-note@+1 {{in instantiation of function template specialization 'tmain<int, char, -1, -2>' requested here}}
  #pragma omp simd collapse(collapse(tmain<int, char, -1, -2>(argc, argv) // expected-error 2 {{expected ')'}} expected-note 2 {{to match this '('}}
  foo();
  // expected-note@+1 {{in instantiation of function template specialization 'tmain<int, char, 1, 0>' requested here}}
  return tmain<int, char, 1, 0>(argc, argv);
}

namespace GH138493 {
void f(void) {
  // This would previously crash when processing an invalid expression as an
  // argument to collapse.
#pragma omp simd collapse(a) // expected-error {{use of undeclared identifier 'a'}}
  for (int i = 0; i < 10; i++)
    ;
}
} // namespace GH138493