llvm dev - Jul 2014 - [LLVMdev] Any update for Pre-increment preparation pass in PowerPC?

Hi, Hal
    I read your pass "Pre-increment preparation pass" on LLVM-commits
mail-list.
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20130128/163731.html
I appreciate your idea in the talking with Andrew.
Recently, I plan to implement a relative pre-increment of memory ops of my
back-end in the
stage of LSR(LoopStrengthReduce).
And now, do you have update your thought and code of this pass?
    Any suggestion will be great.
    Thank you very much in advance.
-Haishan
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