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	!$OMP SIMD
  Inner function definition or declaration	!$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.

real function f (x)
    !DIR$ OMP DECLARE SIMD
    real, intent(in), value  :: x
    f= x + 1
end function f
...

real function f (x)
    !DIR$ OMP DECLARE SIMD
    real, intent(in), value  :: x
    f= x + 1
end function f

!DIR$ OMP SIMD
do k = 1, N
    a(k) = f(k)
enddo

Read More

• DECLARE SIMD, SIMD Directive (OpenMP* API)
• Getting Started with Intel Compiler Pragmas and Directives and Vectorization Resources for Intel® Advisor Users