[Bug target/84025] [nvptx] Don't generate branch-around-nothing

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84025

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 43480
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43480&action=edit
Tentative patch