https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77485
--- Comment #4 from Jeffrey A. Law <law at redhat dot com> --- So my patches for 33562 will detect the partial dead store in "foo", but I never wrote the bits to narrow partial dead stores. The difficulty in optimizing this particular case will be rewriting the CONSTRUCTOR node. Though it may be as simple as walking down the CONSTRUCTOR and splicing out components which correspond to dead assignments -- I'll have to familiarize myself with the guts of how to walk CONSTRUCTOR nodes. Hopefully they're at least in-order and extracting byte offsets is easy :-)
