Thumb2 code size improvements

[Yao Qi]

Yao Qi wrote:
> 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.

I've put some ideas in this wiki page,
https://wiki.linaro.org/Internal/People/YaoQi/Thumb2Optimize