; RUN: opt < %s -reassociate -disable-output
define void @foo() {
%tmp162 = fsub <4 x float> zeroinitializer, zeroinitializer ; <<4 x float>> [#uses=1]
%tmp164 = fmul <4 x float> zeroinitializer, %tmp162 ; <<4 x float>> [#uses=0]
ret void
}