Thumb2 code size improvements

[Yao Qi]

Hi,
We are looking for some possible improvements and optimizations on
thumb2 code size.  Currently, I am running some benchmarks with
compilation flag "-Os -march=armv7-a -mthumb", and hope to find some
thing interesting that we can improve.  Beside that, do you have some
ideas on this topic? or do you have some observations on thumb2 code
that we may probably improve the size?

Any thoughts on this are appreciated.

Yao