llvm dev - Jul 2016 - Loop optimizations implemented in the front end (source-to-source transformation)

Hello.
     I'd like to implement loop transformations that are currently
implemented in LLVM
(loop distribution/fission, strip, coalescing, etc) in the front end, normally
using Clang
normally using libtooling?

     Did anybody tried this already or is considering it? I know currently of
the Scout
project 
(https://tu-dresden.de/die_tu_dresden/zentrale_einrichtungen/zih/forschung/projekte/scout/publications)
which does something similar with Clang, without using libtooling, making it
harder to use
and I guess less standard.

     Another feasible option I'm considering is using CIL (for the C
language; available
at https://github.com/cil-project/cil) - well, a more complete list of similar
tools is
available at
https://en.wikipedia.org/wiki/List_of_program_transformation_systems .

   Thank you,
     Alex