llvm-project/llvm/test/Transforms/DeadArgElim/deadexternal.ll

; RUN: opt -deadargelim -S %s | FileCheck %s
; XFAIL: *

define void @test(i32) {
  ret void
}

define void @foo() {
  call void @test(i32 0)
  ret void
; CHECK: @foo
; CHECK: i32 undef
}