These user-defined function(s) are not vectorized or inlined by the compiler: %function_names% To fix: Do one of the following:

• Enforce vectorization of the source loop by means of SIMD instructions and/or create a SIMD version of the function(s) using a directive:

  Target	Directive
  Source loop	#pragma omp simd
  Inner function definition or declaration	#pragma omp declare simd

• If using the Ob or inline-level compiler option to control inline expansion with the 1 argument, use an inline keyword to enable inlining or replace the 1 argument with 2 to enable inlining of any function at compiler discretion.

#pragma omp declare simd
int f (int x)
{
    return x+1;
}
...

#pragma omp declare simd
int f (int x)
{
    return x+1;
}
#pragma omp simd
for (int k = 0; k < N; k++)
{
    a[k] = f(k);
}

Read More

• omp simd, omp declare simd in OpenMP* Pragmas Summary
• Getting Started with Intel Compiler Pragmas and Directives and Vectorization Resources for Intel® Advisor Users