test verifier

function %deref_cycle() {
    gv1 = deref(gv2)-32 ; error: deref cycle: [gv1, gv2]
    gv2 = deref(gv1)

ebb1:
    return
}

function %self_cycle() {
    gv0 = deref(gv0)-32 ; error: deref cycle: [gv0]

ebb1:
    return
}