third_party/LLVM/test/Transforms/InstCombine/2003-09-09-VolatileLoadElim.ll

; RUN: opt < %s -instcombine -S | grep load

define void @test(i32* %P) {
        ; Dead but not deletable!
        %X = volatile load i32* %P              ; <i32> [#uses=0]
        ret void
}