llvm/clang/test/CodeGen/Inputs/thinlto-opaque.ll

target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64--"

define ptr @f2() {
  ret ptr null
}