[Bug c/60819] dse1 removing not-dead insn (aliasing issue?)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60819

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, we don't simplify

  _2 = VIEW_CONVERT_EXPR<short int[4]>(__A_4(D))[2];

to a BIT_FIELD_REF.