llvm-project/llvm/test/Analysis/CallGraph/2008-09-09-UsedByGlobal.ll

; RUN: llvm-as < %s | opt -print-callgraph -disable-output |& \
; RUN:   grep {Calls function}

@a = global void ()* @f		; <void ()**> [#uses=0]

define internal void @f() {
	unreachable
}