Valu("v", OpConstNil, ptrType, 0, nil),
			Valu("addr1", OpAddr, ptrType, 0, nil, "sb"),
			Valu("wb2", OpStore, types.TypeMem, 0, ptrType, "addr1", "v", "wb1"),
			Valu("wb1", OpStore, types.TypeMem, 0, ptrType, "addr1", "v", "start"), // wb1 and wb2 are out of order
			Goto("exit")),
		Bloc("exit",
			Exit("wb2")))

	CheckFunc(fun.f)
	writebarrier(fun.f)
	CheckFunc(fun.f)
}

        TODO: add detection for wb2 and wb1 -->
    <glob pattern="*.wq1"/>
    <glob pattern="*.wq2"/>
    <glob pattern="*.wkq"/>
    <glob pattern="*.qpw"/>
    <glob pattern="*.wb1"/>
    <glob pattern="*.wb2"/>
    <glob pattern="*.wb3"/>
    <!-- this is true of qp2 and wb3; not for wb2 and wb1 -->
    <sub-class-of type="application/x-tika-msoffice"/>
  </mime-type>