ICODE, with LLInst
Started the move of 'prog' global into Project.
Added replaceExpr, which replaces expression, and deletes the old one. Moved subReg* family to Machine_X86, also moved there a few float op decoding parts. A few more usages of cCode global replaced with ostreams Refactored compoundCond().
renamed two locals in newRegArg, and used range based for in it