[Bug rtl-optimization/104961] [9/10/11/12 Regression] compilation never (?) finishes at -Og

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104961

--- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
I've reproduced the bug.  The mentioned patch is not the cause but a trigger. 
The origin of the problem is actually a removal of hard reg propagation before
RA which happened about year ago.

I hope the fix will be ready on Friday or Monday.