[Bug target/85204] [nvptx] infinite loop generated

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85204

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 43848
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43848&action=edit
Tentative patch