xref: /external/clang/test/OpenMP/parallel_for_linear_messages.cpp

// RUN: %clang_cc1 -verify -fopenmp %s

namespace X {
int x;
};

struct B {
  static int ib; // expected-note {{'B::ib' declared here}}
  static int bfoo() { return 8; }
};

int bfoo() { return 4; }

int z;
const int C1 = 1;
const int C2 = 2;
void test_linear_colons() {
  int B = 0;
#pragma omp parallel for linear(B : bfoo())
  for (int i = 0; i < 10; ++i)
    ;
// expected-error@+1 {{unexpected ':' in nested name specifier; did you mean '::'}}
#pragma omp parallel for linear(B::ib : B : bfoo())
  for (int i = 0; i < 10; ++i)
    ;
// expected-error@+1 {{use of undeclared identifier 'ib'; did you mean 'B::ib'}}
#pragma omp parallel for linear(B : ib)
  for (int i = 0; i < 10; ++i)
    ;
// expected-error@+1 {{unexpected ':' in nested name specifier; did you mean '::'?}}
#pragma omp parallel for linear(z : B : ib)
  for (int i = 0; i < 10; ++i)
    ;
#pragma omp parallel for linear(B : B::bfoo())
  for (int i = 0; i < 10; ++i)
    ;
#pragma omp parallel for linear(X::x : ::z)
  for (int i = 0; i < 10; ++i)
    ;
#pragma omp parallel for linear(B, ::z, X::x)
  for (int i = 0; i < 10; ++i)
    ;
#pragma omp parallel for linear(::z)
  for (int i = 0; i < 10; ++i)
    ;
// expected-error@+1 {{expected variable name}}
#pragma omp parallel for linear(B::bfoo())
  for (int i = 0; i < 10; ++i)
    ;
#pragma omp parallel for linear(B::ib, B : C1 + C2)
  for (int i = 0; i < 10; ++i)
    ;
}

template <int L, class T, class N>
T test_template(T *arr, N num) {
  N i;
  T sum = (T)0;
  T ind2 = -num * L; // expected-note {{'ind2' defined here}}
// expected-error@+1 {{argument of a linear clause should be of integral or pointer type}}
#pragma omp parallel for linear(ind2 : L)
  for (i = 0; i < num; ++i) {
    T cur = arr[(int)ind2];
    ind2 += L;
    sum += cur;
  }
  return T();
}

template <int LEN>
int test_warn() {
  int ind2 = 0;
// expected-warning@+1 {{zero linear step (ind2 should probably be const)}}
#pragma omp parallel for linear(ind2 : LEN)
  for (int i = 0; i < 100; i++) {
    ind2 += LEN;
  }
  return ind2;
}

struct S1; // expected-note 2 {{declared here}} expected-note 2 {{forward declaration of 'S1'}}
extern S1 a;
class S2 {
  mutable int a;

public:
  S2() : a(0) {}
};
const S2 b; // expected-note 2 {{'b' defined here}}
const S2 ba[5];
class S3 {
  int a;

public:
  S3() : a(0) {}
};
const S3 ca[5];
class S4 {
  int a;
  S4();

public:
  S4(int v) : a(v) {}
};
class S5 {
  int a;
  S5() : a(0) {}

public:
  S5(int v) : a(v) {}
};

S3 h;
#pragma omp threadprivate(h) // expected-note 2 {{defined as threadprivate or thread local}}

template <class I, class C>
int foomain(I argc, C **argv) {
  I e(4);
  I g(5);
  int i;
  int &j = i;
#pragma omp parallel for linear // expected-error {{expected '(' after 'linear'}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear() // expected-error {{expected expression}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(argc // expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(argc, // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(argc > 0 ? argv[1] : argv[2]) // expected-error {{expected variable name}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(argc : 5)
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(S1) // expected-error {{'S1' does not refer to a value}}
  for (int k = 0; k < argc; ++k)
    ++k;
// expected-error@+2 {{linear variable with incomplete type 'S1'}}
// expected-error@+1 {{const-qualified variable cannot be linear}}
#pragma omp parallel for linear(a, b : B::ib)
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(argv[1]) // expected-error {{expected variable name}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(e, g)
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(h) // expected-error {{threadprivate or thread local variable cannot be linear}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(i)
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel
  {
    int v = 0;
    int i;
#pragma omp parallel for linear(v : i)
    for (int k = 0; k < argc; ++k) {
      i = k;
      v += i;
    }
  }
#pragma omp parallel for linear(j)
  for (int k = 0; k < argc; ++k)
    ++k;
  int v = 0;
#pragma omp parallel for linear(v : j)
  for (int k = 0; k < argc; ++k) {
    ++k;
    v += j;
  }
#pragma omp parallel for linear(i)
  for (int k = 0; k < argc; ++k)
    ++k;
  return 0;
}

namespace A {
double x;
#pragma omp threadprivate(x) // expected-note {{defined as threadprivate or thread local}}
}
namespace C {
using A::x;
}

int main(int argc, char **argv) {
  double darr[100];
  // expected-note@+1 {{in instantiation of function template specialization 'test_template<-4, double, int>' requested here}}
  test_template<-4>(darr, 4);
  // expected-note@+1 {{in instantiation of function template specialization 'test_warn<0>' requested here}}
  test_warn<0>();

  S4 e(4); // expected-note {{'e' defined here}}
  S5 g(5); // expected-note {{'g' defined here}}
  int i;
  int &j = i;
#pragma omp parallel for linear // expected-error {{expected '(' after 'linear'}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear() // expected-error {{expected expression}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(argc // expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(argc, // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(argc > 0 ? argv[1] : argv[2]) // expected-error {{expected variable name}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(argc)
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(S1) // expected-error {{'S1' does not refer to a value}}
  for (int k = 0; k < argc; ++k)
    ++k;
// expected-error@+2 {{linear variable with incomplete type 'S1'}}
// expected-error@+1 {{const-qualified variable cannot be linear}}
#pragma omp parallel for linear(a, b)
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(argv[1]) // expected-error {{expected variable name}}
  for (int k = 0; k < argc; ++k)
    ++k;
// expected-error@+2 {{argument of a linear clause should be of integral or pointer type, not 'S4'}}
// expected-error@+1 {{argument of a linear clause should be of integral or pointer type, not 'S5'}}
#pragma omp parallel for linear(e, g)
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(h, C::x) // expected-error 2 {{threadprivate or thread local variable cannot be linear}}
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel
  {
    int i;
#pragma omp parallel for linear(i)
    for (int k = 0; k < argc; ++k)
      ++k;
#pragma omp parallel for linear(i : 4)
    for (int k = 0; k < argc; ++k) {
      ++k;
      i += 4;
    }
  }
#pragma omp parallel for linear(j)
  for (int k = 0; k < argc; ++k)
    ++k;
#pragma omp parallel for linear(i)
  for (int k = 0; k < argc; ++k)
    ++k;

  foomain<int, char>(argc, argv); // expected-note {{in instantiation of function template specialization 'foomain<int, char>' requested here}}
  return 0;
}