RD llvm: make writes with empty points-to a write into unknown memory
RD llvm: make writes with empty points-to a write into unknown memory

Signed-off-by: Marek Chalupa <a05df156a69ad59faa9af9b666ef78009594c145@gmail.com>

mchalupa/dg,mchalupa/dg,mchalupa/dg,mchalupa/dg