* Replace SSABuilder's variables HashMaps with EntityMaps. Current measurements show that memory usage is approximately the same, and it's about 20% faster. * Add EntityMap::with_default and use it. * rustfmt * Use var_defs[block].expand().
* Replace SSABuilder's variables HashMaps with EntityMaps. Current measurements show that memory usage is approximately the same, and it's about 20% faster. * Add EntityMap::with_default and use it. * rustfmt * Use var_defs[block].expand().