; RUN: FileCheck -check-prefix=FOO -check-prefix=FOOBAR -check-prefix=BARFOO -input-file %s %s -allow-unused-prefixes ; RUN: FileCheck -check-prefix=FOOBAR -check ...
; RUN: FileCheck -check-prefix=FOO -check-prefix=FOOBAR -check-prefix=BARFOO -input-file %s %s ; RUN: FileCheck -check-prefix=FOOBAR -check-prefix=FOO -check-prefix ...