[llvm] r210282 - [PPC64LE] Correct vperm -> shuffle transform for little endian

[Chandler Carruth]

On Thu, Jun 5, 2014 at 12:46 PM, Bill Schmidt <wschmidt at linux.vnet.ibm.com>
wrote:

> The correctness of this code is tested by the new perm.c test added in
> a previous patch, and by other tests in the test suite that fail
> without this patch.
>

LLVM optimizations can't be correctness tested by a C test... Please add
LLVM IR-level testing for the correctness here.
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