Optimizing const objects in LLVM -- Proposal

Rerouting this message with a new public-visible copy of the document at
https://docs.google.com/document/d/112O-Q_XrbrU1I4P-oiLCN9u86Qg_BYBdcDsmh7Pn9Nw/edit?usp=sharing

Thanks,
– Larisse.