[PowerPC CodeGen] patch for bug 15763

[David Fang]

>> Updated and re-attached.
>> Could you commit on my behalf?  (not a committer)
>> Thanks for the review.
>
> r180657
> Looks like you are doing quiet a bit of work for darwin ppc, you
> should probably ask for commit access.

Thanks for committing to trunk for me.  I've sync'd up my branch past that 
revision, and tests still look good.

I'm not too concerned about commit access yet, I don't mind submitting 
patches from my workspace.  I already do know that my gcc-4.0-related 
patches won't be accepted, but I will submit other patches from my branch 
as they become ready.

branches:
https://github.com/fangism/llvm/tree/powerpc-darwin8
https://github.com/fangism/clang/tree/powerpc-darwin8

I keep test logs and notes here:
http://www.csl.cornell.edu/~fang/sw/llvm/

Fang

-- 
David Fang
http://www.csl.cornell.edu/~fang/