llvm dev - Dec 2012 - [LLVMdev] New register allocation hinting mechanism

I just updated register allocation hinting mechanism to be more flexible and
hopefully easier to use.

If you have an out-of-tree target that was overriding the
TRI::ResolveRegAllocHint() or TRI::getRawAllocationOrder() functions, you should
switch it to using the new TRI::getRegAllocationHints() function instead. See
the ARM target for an example.

Zino, I believe the new hints are powerful enough to improve ldm/stm formation
on ARM. Were you interested in working on that?

/jakob