A proposal to align GCC stack

[Ye, Joey]

Christian Schüler writes:

> Please go forward with this idea!

> The current implementation of force_align_arg_pointer has never worked for me.
This proposal should solve your problem. But to comfirm, I'd like to know the 
root cause. force_align_arg_pointer should have guaranteed 16 bytes align. Are
you using data structure requirement alignment larger than 16? Or maybe you
didn't specify force_align_arg_pointer for all of your functions?

Thanks - Joey