[Bug tree-optimization/85063] Switch conversion in openacc routine introduces unsupported construct

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85063

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 43749
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43749&action=edit
Updated tentative patch