The /fuselevel=1 qualifier causes KAP to attempt loop
fusion after making additional passes through the source program to
gather information about data dependencies. When you activate
/fuselevel=1 , KAP automatically sets the /fuse
qualifier.
The default is /fuselevel=0 . The effect of
/fuselevel=0 is equivalent to setting the /fuse
qualifier. See Section 4.5.9.