Fix If uniqueness checking.
Fix If uniqueness checking.

ihc/futhark,HIPERFIT/futhark,ihc/futhark,HIPERFIT/futhark,ihc/futhark,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark