The -fuselevel=1 switch causes KAP to attempt loop
fusion after making additional passes through the source program
to gather information about data dependencies. To activate
-fuselevel=1 , you must also use the -fuse
switch as follows:
-fuse -fuselevel=1
The default is -fuselevel=0 . The effect of
-fuselevel=0 is equivalent to setting the -
fuse switch. See Section 4.5.9.