simplified a bit to make the resulting optimizer smaller; Added a

constant w2 that can be used in the patterns instead of 2*w

modules/src/em_opt/syntax.l

@@ -12,6 +12,7 @@ sfit		return(SFIT);
 ufit		return(UFIT);
 rotate		return(ROTATE);
 p		return(PSIZE);
+w2		return(DWSIZE);
 w		return(WSIZE);
 defined		return(DEFINED);
 undefined	return(UNDEFINED);