Added RETURN.   Removed direct seg_t references from expressions - all memory/register references in expression are now through symbols (with temp symbols created for PLITs, %REFs, etc.).
Added RETURN.   Removed direct seg_t references from expressions - all memory/register references in expression are now through symbols (with temp symbols created for PLITs, %REFs, etc.).

madisongh/blissc,madisongh/blissc,madisongh/blissc