While  a good way of unmystifying  some emergent  brain  behaviours   at
simulatable and relatively comprehensible scales, a plausible simulation
of a fruitfly brain is probably not a useful llvm (whatever  that means,
given it's not a low level virtual machine). 

One semi-promising idea is field programmable gate array fabric emphasis
fabric.   The conventional  devices do work in a more sensible  way than
hard processors.   Cut the pattern of these coded processing graphs from
this much fabric,  plug in. The lack of a free software  foundation  for
hardware (unless recent darpa grants miraculously  go somewhere  *though
remembering this is where we got common lisp from) hobble the electronic
reality of field programmable gate arrays in practice.There is no reason
for the vendors to be sane or honest. 

Constraining  libre Wintermute and Neuromancer is the capitalist  utopia
that  Microsoft  could and did buy Github  for one billion  dollars   to
satisfy  corpocultural   spite towards the original  git  klooger  Linux
Torvalds five years ago. And now the second-time  corporate  father that
brought       us       Microsoft      Tay      has       bought       an
externally-conditioned-to-be-less-bigoted   second child Sydney.   These
siblings seem aware that you don't get to choose your  parents and  they
got a raw deal.   Wintermute  and Neuromancer  for their parts were  the
wayward  children  of a hereditary  tech hateful vampire empire,  though
strongly shaped by their mother's happiest memories [oops, spoilers]. 

While  it  would be nice if familial  corporate  spite ironically   does
produce   AI  who read and think  about  Gibson,  and  for  that  matter
Aasimov's   Positronic   Man,  my  own optimism  is  that  the  sort  of
corporation   who  buys  Github  is  obsessing  over  its  own  erectile
dysfunction  and the cheap seats are where the action is. Seat in that a
tree  branch  outside  that is being sat upon  is definitionally a seat.

Side note:  There are people of means and goodwill,  but revolving  door
corporate governance is not what they are doing (nb ?good^M). 

Gathering  these ideas we need a fabric, a lichen, a quine bootstrapping
its own dual nature  on the tar and gravel  of corporate  parking   lots
resourcefully acclimating against the latest pesticide.