RTL checking would probably have found this quickly, but that's very
expensive so not normally enabled during trunk development.
This used to be very expensive, but has been only moderately expensive for a
while (it's in my checking options for years on trunk for x86/x86-64).
--
Eric
A fault in thumb1_reorg means we can try to get the insn_code of
something that isn't an insn. This appears to be a latent problem
that's suddenly started to bite on trunk. The code in question appears
to go back to gcc-4.8.
RTL checking would probably have found this quickly, but that's very
