[Bug lto/70929] [4.9/5/6/7 regression] Cross-module inlining for functions having argument passed by reference is no longer working.

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70929

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks reasonable if it can get some baking time on trunk.