Constant-fold conjoin(x) to x.
Constant-fold conjoin(x) to x.

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