[Bug debug/89463] debug information for iteractor of an empty loop is gone (at -O3)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89463

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Patch posted here: https://gcc.gnu.org/ml/gcc-patches/2019-03/msg01192.html

Some of your bugs might turn out as duplicates if they are fixed by that patch.