Twiddle fusion transformations a bit.
Twiddle fusion transformations a bit.

There were some easy cases that failed.

mrakgr/futhark,diku-dk/futhark,mrakgr/futhark,HIPERFIT/futhark,mrakgr/futhark,HIPERFIT/futhark,ihc/futhark,ihc/futhark,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,ihc/futhark,CulpaBS/wbBach,HIPERFIT/futhark