Properly setup vtable during bottom-up simplification.
Properly setup vtable during bottom-up simplification.

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