gcc/testsuite/gcc.dg/gomp/simd-clones-5.c

/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
/* { dg-options "-fopenmp -w" } */

/* ?? The -w above is to inhibit the following warning for now:
   a.c:2:6: warning: AVX vector argument without AVX enabled changes
   the ABI.  */

#pragma omp declare simd notinbranch simdlen(4)
void foo (int *a)
{
  *a = 555;
}