[Bug debug/86687] Wrong debug information for string types passed as parameters

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86687

--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 44464
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44464&action=edit
Tentative patch