B→i1 relop 1 i P1:=lookup(i, name lookup(io. name if p>nil and ps>nil then begin B truelist: -makelist(nextcode) emit grelop, P1,P2,0); B. falselist: =makelist(nextcode) emit(-2-,0) end else errorB→i1 relop i2 { P1 :=lookup(i1 .name); P2 :=lookup(i2 .name); if P1<>nil and P2<>nil then begin B.truelist:=makelist(nextcode); emit (jrelop,P1 , P2 ,0); B.falselist:=makelist(nextcode); emit(j,-,-,0) end else error }