[Bug lto/87988] [9 regression] Streaming of ABSTRACT_ORIGIN is expensive

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87988

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, I'd rather not put this hack on trunk.  Iff then a very limited scope
TREE_DIE (same cases as the hack) should be brought in.