[Bug rtl-optimization/60763] [4.9 Regression] ICE in extract_insn starting with rev 208984

[dje at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60763

--- Comment #5 from David Edelsohn <dje at gcc dot gnu.org> ---
I can see why the proposed patch will work, but it seems a little heavy-handed.
This case isn't something that simplify_gen_subreg() should handle?