[PATCH] D34391: [RegisterCoalescer] Fix for SubRange join unreachable

[Nick Johnson via Phabricator via llvm-commits]

npjdesres added a comment.

FYI I tried this patch in my out-of-tree backend (hoping to resolve http://llvm.org/PR32773).  I observed a segfault SR.removeValNo(RmValNo) because RmValNo may be null.

I don't know yet whether this is specific to my backend, but I thought I'd mention it in case it indicates a more general problem.


https://reviews.llvm.org/D34391