Re: [PATCH 0/7] openmp: OpenMP 5.1 loop transformation directives

[Jakub Jelinek <jakub@redhat.com>]

On Mon, May 15, 2023 at 12:19:00PM +0200, Jakub Jelinek via Gcc-patches wrote:
> For C++ in templates we obviously need to defer that until instantiations,
> the constants in the clauses etc. could be template parameters etc.

Even in C++ the how many canonical loop nest form loops does this
transformation generate can be probably answered during parsing at least
for the 5.1/5.2 loop transformations.
I think we don't really allow
template <int ...args>
void foo ()
{
  #pragma omp for collapse(2)
  #pragma omp tile sizes(args...)
  for (int i = 0; i < 64; i++)
    for (int j = 0; j < 64; j++)
      for (int k = 0; k < 64; k++)
	;
}
there how many arguments sizes clause has would be determined only
after instantiation.  Of course, we don't know the exact values...

	Jakub