[Bug tree-optimization/65887] remove va_arg ap copies

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65887

--- Comment #1 from vries at gcc dot gnu.org ---
Created attachment 35402
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35402&action=edit
patch to remove copyback