clang 3.5 loop optimizer seems to jump in unintentional for simple loops

Clang Frontend
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clang 3.5 loop optimizer seems to jump in unintentional for simple loops

the very simple example

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You'll want to carry on this discussion on llvmdev@cs.uiuc.edu rather
than cfe-dev. cfe-dev is largely concerned with the front end, llvmdev
is the back end and optimizers.

Thanks!

-eric