gcc/testsuite/g++.dg/gomp/pr39495-2.C

// PR c/39495
// { dg-do compile }
// { dg-options "-fopenmp" }

#define INT_MIN (-__INT_MAX__ - 1)
#define INT_MAX __INT_MAX__
#define UINT_MAX (2U * __INT_MAX__ + 1)

void
foo (void)
{
  int i;
  unsigned int u;

#pragma omp for
  for (i = INT_MIN + 6; i != INT_MIN; i--)
    ;
#pragma omp for
  for (i = INT_MIN + 6; i == INT_MIN; i--)	// { dg-error "invalid controlling predicate" }
    ;
#pragma omp for
  for (i = INT_MAX - 6; i != INT_MAX; i++)
    ;
#pragma omp for
  for (i = INT_MAX - 6; i == INT_MAX; i++)	// { dg-error "invalid controlling predicate" }
    ;
#pragma omp for
  for (u = 6; u != 0; u--)
    ;
#pragma omp for
  for (u = 6; u == 0; u--)			// { dg-error "invalid controlling predicate" }
    ;
#pragma omp for
  for (u = UINT_MAX - 6; u != UINT_MAX; u++)
    ;
#pragma omp for
  for (u = UINT_MAX - 6; u == UINT_MAX; u++)	// { dg-error "invalid controlling predicate" }
    ;
}