text: // RUN: %clang_cc1 -fsyntax-only -fopenmp -x c++ -std=c++11 -fexceptions -fcxx-exceptions -verify=expected,omp4 %s -Wuninitialized
  // RUN: %clang_cc1 -fsyntax-only -fopenmp -fopenmp-version=50 -x c++ -std=c++11 -fexceptions -fcxx-exceptions -verify=expected,omp5 %s -Wuninitialized
  
  // RUN: %clang_cc1 -fsyntax-only -fopenmp-simd -x c++ -std=c++11 -fexceptions -fcxx-exceptions -verify=expected,omp4 %s -Wuninitialized
  // RUN: %clang_cc1 -fsyntax-only -fopenmp-simd -fopenmp-version=50 -x c++ -std=c++11 -fexceptions -fcxx-exceptions -verify=expected,omp5 %s -Wuninitialized
  
  static int sii;
  // expected-note@+1 {{defined as threadprivate or thread local}}
  #pragma omp threadprivate(sii)
  static int globalii;
  
  int test_iteration_spaces() {
    const int N = 100;
    float a[N], b[N], c[N];
    int ii, jj, kk;
    float fii;
    double dii;
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (int i = 0; i < 10; i+=1) {
      c[i] = a[i] + b[i];
    }
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (char i = 0; i < 10; i++) {
      c[i] = a[i] + b[i];
    }
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (char i = 0; i < 10; i+='\1') {
      c[i] = a[i] + b[i];
    }
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (long long i = 0; i < 10; i++) {
      c[i] = a[i] + b[i];
    }
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{expression must have integral or unscoped enumeration type, not 'double'}}
    #pragma omp distribute simd
    for (long long i = 0; i < 10; i+=1.5) {
      c[i] = a[i] + b[i];
    }
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (long long i = 0; i < 'z'; i+=1u) {
      c[i] = a[i] + b[i];
    }
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{variable must be of integer or random access iterator type}}
    #pragma omp distribute simd
    for (float fi = 0; fi < 10.0; fi++) {
      c[(int)fi] = a[(int)fi] + b[(int)fi];
    }
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{variable must be of integer or random access iterator type}}
    #pragma omp distribute simd
    for (double fi = 0; fi < 10.0; fi++) {
      c[(int)fi] = a[(int)fi] + b[(int)fi];
    }
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (int &ref = ii; ref < 10; ref++) {
    }
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (int i; i < 10; i++)
      c[i] = a[i];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (int i = 0, j = 0; i < 10; ++i)
      c[i] = a[i];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (;ii < 10; ++ii)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-warning@+3 {{expression result unused}}
    // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (ii + 1;ii < 10; ++ii)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (c[ii] = 0;ii < 10; ++ii)
      c[ii] = a[ii];
  
    // Ok to skip parenthesises.
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (((ii)) = 0;ii < 10; ++ii)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'i'}}
    #pragma omp distribute simd
    for (int i = 0; i; i++)
      c[i] = a[i];
  
    #pragma omp target
    #pragma omp teams
    // omp4-error@+3 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}} omp5-error@+3 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'i'}}
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'i'}}
    #pragma omp distribute simd
    for (int i = 0; jj < kk; ii++)
      c[i] = a[i];
  
    #pragma omp target
    #pragma omp teams
    // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'i'}}
    #pragma omp distribute simd
    for (int i = 0; !!i; i++)
      c[i] = a[i];
  
    #pragma omp target
    #pragma omp teams
    // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}}
    #pragma omp distribute simd
    for (int i = 0; i != 1; i++)
      c[i] = a[i];
  
    #pragma omp target
    #pragma omp teams
    // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'i'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'i'}}
    #pragma omp distribute simd
    for (int i = 0; ; i++)
      c[i] = a[i];
  
    // Ok.
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (int i = 11; i > 10; i--)
      c[i] = a[i];
  
    // Ok.
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (int i = 0; i < 10; ++i)
      c[i] = a[i];
  
      // Ok.
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (ii = 0; ii < 10; ++ii)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; ++jj)
      c[ii] = a[jj];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; ++ ++ ii)
      c[ii] = a[ii];
  
    // Ok but undefined behavior (in general, cannot check that incr
    // is really loop-invariant).
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (ii = 0; ii < 10; ii = ii + ii)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{expression must have integral or unscoped enumeration type, not 'float'}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; ii = ii + 1.0f)
      c[ii] = a[ii];
  
    // Ok - step was converted to integer type.
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (ii = 0; ii < 10; ii = ii + (int)1.1f)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; jj = ii + 2)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-warning@+3 {{relational comparison result unused}}
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; jj > kk + 2)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10;)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-warning@+3 {{expression result unused}}
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; !ii)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; ii ? ++ii : ++jj)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'ii'}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; ii = ii < 10)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be positive due to this condition}}
    // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; ii = ii + 0)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be positive due to this condition}}
    // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; ii = ii + (int)(0.8 - 0.45))
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be positive due to this condition}}
    // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (ii = 0; (ii) < 10; ii-=25)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be positive due to this condition}}
    // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (ii = 0; (ii < 10); ii-=0)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be negative due to this condition}}
    // expected-error@+2 {{increment expression must cause 'ii' to decrease on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (ii = 0; ii > 10; (ii+=0))
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be positive due to this condition}}
    // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (ii = 0; ii < 10; (ii) = (1-1)+(ii))
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be negative due to this condition}}
    // expected-error@+2 {{increment expression must cause 'ii' to decrease on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for ((ii = 0); ii > 10; (ii-=0))
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be positive due to this condition}}
    // expected-error@+2 {{increment expression must cause 'ii' to increase on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (ii = 0; (ii < 10); (ii-=0))
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // omp4-note@+2  {{defined as private}}
    // omp4-error@+2 {{loop iteration variable in the associated loop of 'omp distribute simd' directive may not be private, predetermined as linear}}
    #pragma omp distribute simd private(ii)
    for (ii = 0; ii < 10; ii++)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+1 {{unexpected OpenMP clause 'shared' in directive '#pragma omp distribute simd'}}
    #pragma omp distribute simd shared(ii)
    for (ii = 0; ii < 10; ii++)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd linear(ii)
    for (ii = 0; ii < 10; ii++)
      c[ii] = a[ii];
  
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd lastprivate(ii) linear(jj) collapse(2) // expected-note {{defined as linear}}
    for (ii = 0; ii < 10; ii++)
    for (jj = 0; jj < 10; jj++) // expected-error {{loop iteration variable in the associated loop of 'omp distribute simd' directive may not be linear, predetermined as lastprivate}}
      c[ii] = a[jj];
  
  
    #pragma omp parallel
    {
      #pragma omp target
      #pragma omp teams
  // expected-error@+2 {{loop iteration variable in the associated loop of 'omp distribute simd' directive may not be threadprivate or thread local, predetermined as linear}}
      #pragma omp distribute simd
      for (sii = 0; sii < 10; sii+=1)
        c[sii] = a[sii];
    }
  
    #pragma omp parallel
    {
      #pragma omp target
      #pragma omp teams
      #pragma omp distribute simd
      for (globalii = 0; globalii < 10; globalii+=1)
        c[globalii] = a[globalii];
    }
  
    #pragma omp parallel
    {
  #pragma omp target
  #pragma omp teams
  #pragma omp distribute simd collapse(2)
      for (ii = 0; ii < 10; ii += 1)
      for (globalii = 0; globalii < 10; globalii += 1)
        c[globalii] += a[globalii] + ii;
    }
  
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{statement after '#pragma omp distribute simd' must be a for loop}}
    #pragma omp distribute simd
    for (auto &item : a) {
      item = item + 1;
    }
  
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be positive due to this condition}}
    // expected-error@+2 {{increment expression must cause 'i' to increase on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (unsigned i = 9; i < 10; i--) {
      c[i] = a[i] + b[i];
    }
  
    int (*lb)[4] = nullptr;
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (int (*p)[4] = lb; p < lb + 8; ++p) {
    }
  
    #pragma omp target
    #pragma omp teams
    // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (int a{0}; a<10; ++a) {
    }
  
    return 0;
  }
  
  // Iterators allowed in openmp for-loops.
  namespace std {
  struct random_access_iterator_tag { };
  template <class Iter> struct iterator_traits {
    typedef typename Iter::difference_type difference_type;
    typedef typename Iter::iterator_category iterator_category;
  };
  template <class Iter>
  typename iterator_traits<Iter>::difference_type
  distance(Iter first, Iter last) { return first - last; }
  }
  class Iter0 {
    public:
      Iter0() { }
      Iter0(const Iter0 &) { }
      Iter0 operator ++() { return *this; }
      Iter0 operator --() { return *this; }
      Iter0 operator + (int delta) { return *this; }
      bool operator <(Iter0 a) { return true; }
  };
  // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'Iter0' for 1st argument}}
  int operator -(Iter0 a, Iter0 b) { return 0; }
  class Iter1 {
    public:
      Iter1(float f=0.0f, double d=0.0) { }
      Iter1(const Iter1 &) { }
      Iter1 operator ++() { return *this; }
      Iter1 operator --() { return *this; }
      bool operator <(Iter1 a) { return true; }
      bool operator >=(Iter1 a) { return false; }
  };
  class GoodIter {
    public:
      GoodIter() { }
      GoodIter(const GoodIter &) { }
      GoodIter(int fst, int snd) { }
      GoodIter &operator =(const GoodIter &that) { return *this; }
      GoodIter &operator =(const Iter0 &that) { return *this; }
      GoodIter &operator +=(int x) { return *this; }
      explicit GoodIter(void *) { }
      GoodIter operator ++() { return *this; }
      GoodIter operator --() { return *this; }
      bool operator !() { return true; }
      bool operator <(GoodIter a) { return true; }
      bool operator <=(GoodIter a) { return true; }
      bool operator >=(GoodIter a) { return false; }
      typedef int difference_type;
      typedef std::random_access_iterator_tag iterator_category;
  };
  // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'GoodIter' for 1st argument}}
  int operator -(GoodIter a, GoodIter b) { return 0; }
  // expected-note@+1 2 {{candidate function not viable: requires single argument 'a', but 2 arguments were provided}}
  GoodIter operator -(GoodIter a) { return a; }
  // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'GoodIter' for 1st argument}}
  GoodIter operator -(GoodIter a, int v) { return GoodIter(); }
  GoodIter operator +(GoodIter a, int v) { return GoodIter(); }
  // expected-note@+1 2 {{candidate function not viable: no known conversion from 'Iter1' to 'int' for 1st argument}}
  GoodIter operator -(int v, GoodIter a) { return GoodIter(); }
  GoodIter operator +(int v, GoodIter a) { return GoodIter(); }
  
  int test_with_random_access_iterator() {
    GoodIter begin, end;
    Iter0 begin0, end0;
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (GoodIter I = begin; I < end; ++I) // expected-warning 2 {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++I;
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (GoodIter &I = begin; I < end; ++I)
      ++I;
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (GoodIter I = begin; I >= end; --I) // expected-warning 2 {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++I;
    #pragma omp target
    #pragma omp teams
    // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (GoodIter I(begin); I < end; ++I) // expected-warning 2 {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++I;
    #pragma omp target
    #pragma omp teams
    // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (GoodIter I(nullptr); I < end; ++I) // expected-warning {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++I;
    #pragma omp target
    #pragma omp teams
    // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (GoodIter I(0); I < end; ++I) // expected-warning {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++I;
    #pragma omp target
    #pragma omp teams
    // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (GoodIter I(1,2); I < end; ++I) // expected-warning {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++I;
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (begin = GoodIter(0); begin < end; ++begin) // expected-warning 2 {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++begin;
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (begin = GoodIter(1,2); begin < end; ++begin) // expected-warning 2 {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++begin;
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (++begin; begin < end; ++begin)
      ++begin;
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (begin = end; begin < end; ++begin) // expected-warning 2 {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++begin;
    #pragma omp target
    #pragma omp teams
    // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'I'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'I'}}
    #pragma omp distribute simd
    for (GoodIter I = begin; I - I; ++I)
      ++I;
    #pragma omp target
    #pragma omp teams
    // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'I'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'I'}}
    #pragma omp distribute simd
    for (GoodIter I = begin; begin < end; ++I)
      ++I;
    #pragma omp target
    #pragma omp teams
    // omp4-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', or '>=') of loop variable 'I'}} omp5-error@+2 {{condition of OpenMP for loop must be a relational comparison ('<', '<=', '>', '>=', or '!=') of loop variable 'I'}}
    #pragma omp distribute simd
    for (GoodIter I = begin; !I; ++I)
      ++I;
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be negative due to this condition}}
    // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (GoodIter I = begin; I >= end; I = I + 1)
      ++I;
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (GoodIter I = begin; I >= end; I = I - 1) // expected-warning 2 {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++I;
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'I'}}
    #pragma omp distribute simd
    for (GoodIter I = begin; I >= end; I = -I)
      ++I;
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be negative due to this condition}}
    // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (GoodIter I = begin; I >= end; I = 2 + I)
      ++I;
    #pragma omp target
    #pragma omp teams
    // expected-error@+2 {{increment clause of OpenMP for loop must perform simple addition or subtraction on loop variable 'I'}}
    #pragma omp distribute simd
    for (GoodIter I = begin; I >= end; I = 2 - I)
      ++I;
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (Iter0 I = begin0; I < end0; ++I) // expected-warning 2 {{Non-trivial type 'Iter0' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++I;
  
    #pragma omp target
    #pragma omp teams
    // Initializer is constructor without params.
    // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (Iter0 I; I < end0; ++I) // expected-warning {{Non-trivial type 'Iter0' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++I;
  
    Iter1 begin1, end1;
    #pragma omp target
    #pragma omp teams
    // expected-error@+3 {{invalid operands to binary expression ('Iter1' and 'Iter1')}}
    // expected-error@+2 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
    #pragma omp distribute simd
    for (Iter1 I = begin1; I < end1; ++I)
      ++I;
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be negative due to this condition}}
    // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (Iter1 I = begin1; I >= end1; ++I)
      ++I;
  
    // Initializer is constructor with all default params.
    #pragma omp target
    #pragma omp teams
    // expected-error@+4 {{invalid operands to binary expression ('Iter1' and 'float')}}
    // expected-error@+3 {{could not calculate number of iterations calling 'operator-' with upper and lower loop bounds}}
    // expected-warning@+2 {{initialization clause of OpenMP for loop is not in canonical form ('var = init' or 'T var = init')}}
    #pragma omp distribute simd
    for (Iter1 I; I < end1; ++I) {
    }
  
    return 0;
  }
  
  template <typename IT, int ST> class TC {
    public:
      int dotest_lt(IT begin, IT end) {
        // expected-note@+3 {{loop step is expected to be positive due to this condition}}
        // expected-error@+2 {{increment expression must cause 'I' to increase on each iteration of OpenMP for loop}}
        #pragma omp distribute simd
        for (IT I = begin; I < end; I = I + ST) {
          ++I;
        }
        #pragma omp target
        #pragma omp teams
        // expected-note@+3 {{loop step is expected to be positive due to this condition}}
        // expected-error@+2 {{increment expression must cause 'I' to increase on each iteration of OpenMP for loop}}
        #pragma omp distribute simd
        for (IT I = begin; I <= end; I += ST) { // expected-warning 2 {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
          ++I;
        }
        #pragma omp distribute simd
        for (IT I = begin; I < end; ++I) {
          ++I;
        }
      }
  
      static IT step() {
        return IT(ST);
      }
  };
  template <typename IT, int ST=0> int dotest_gt(IT begin, IT end) {
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 2 {{loop step is expected to be negative due to this condition}}
    // expected-error@+2 2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (IT I = begin; I >= end; I = I + ST) {
      ++I;
    }
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 2 {{loop step is expected to be negative due to this condition}}
    // expected-error@+2 2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (IT I = begin; I >= end; I += ST) {
      ++I;
    }
  
    #pragma omp target
    #pragma omp teams
    // expected-note@+3 {{loop step is expected to be negative due to this condition}}
    // expected-error@+2 {{increment expression must cause 'I' to decrease on each iteration of OpenMP for loop}}
    #pragma omp distribute simd
    for (IT I = begin; I >= end; ++I) {
      ++I;
    }
  
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (IT I = begin; I < end; I+=TC<int,ST>::step()) { // expected-warning 2 {{Non-trivial type 'GoodIter' is mapped, only trivial types are guaranteed to be mapped correctly}}
      ++I;
    }
  }
  
  void test_with_template() {
    GoodIter begin, end;
    TC<GoodIter, 100> t1;
    TC<GoodIter, -100> t2;
    t1.dotest_lt(begin, end); // expected-note {{in instantiation of member function 'TC<GoodIter, 100>::dotest_lt' requested here}}
    t2.dotest_lt(begin, end); // expected-note {{in instantiation of member function 'TC<GoodIter, -100>::dotest_lt' requested here}}
    dotest_gt(begin, end); // expected-note {{in instantiation of function template specialization 'dotest_gt<GoodIter, 0>' requested here}}
    dotest_gt<unsigned, 10>(0, 100); // expected-note {{in instantiation of function template specialization 'dotest_gt<unsigned int, 10>' requested here}}
  }
  
  void test_loop_break() {
    const int N = 100;
    float a[N], b[N], c[N];
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (int i = 0; i < 10; i++) {
      c[i] = a[i] + b[i];
      for (int j = 0; j < 10; ++j) {
        if (a[i] > b[j])
          break; // OK in nested loop
      }
      switch(i) {
        case 1:
          b[i]++;
          break;
        default:
          break;
      }
      if (c[i] > 10)
        break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
  
      if (c[i] > 11)
        break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
    }
  
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (int i = 0; i < 10; i++) {
      for (int j = 0; j < 10; j++) {
        c[i] = a[i] + b[i];
        if (c[i] > 10) {
          if (c[i] < 20) {
            break; // OK
          }
        }
      }
    }
  }
  
  void test_loop_eh() {
    const int N = 100;
    float a[N], b[N], c[N];
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (int i = 0; i < 10; i++) {
      c[i] = a[i] + b[i];
      try { // expected-error {{'try' statement cannot be used in OpenMP simd region}}
        for (int j = 0; j < 10; ++j) {
          if (a[i] > b[j])
            throw a[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
        }
        throw a[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
      }
      catch (float f) {
        if (f > 0.1)
          throw a[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
        return; // expected-error {{cannot return from OpenMP region}}
      }
      switch(i) {
        case 1:
          b[i]++;
          break;
        default:
          break;
      }
      for (int j = 0; j < 10; j++) {
        if (c[i] > 10)
          throw c[i]; // expected-error {{'throw' statement cannot be used in OpenMP simd region}}
      }
    }
    if (c[9] > 10)
      throw c[9]; // OK
  
    #pragma omp target
    #pragma omp teams
    #pragma omp distribute simd
    for (int i = 0; i < 10; ++i) {
      struct S {
        void g() { throw 0; }
      };
    }
  }
  
  