[llvm] r257875 - [InstCombine] Rewrite bswap/bitreverse handling completely.

[Hans Wennborg via llvm-commits]

On Fri, Jan 22, 2016 at 7:50 AM, Ismail Donmez via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> On Fri, Jan 22, 2016 at 4:52 PM, James Molloy via llvm-commits
> <llvm-commits at lists.llvm.org> wrote:
>> Hi,
>>
>> Yes, r257886 needs to be merged also. This appeases the msan bots, and could explain your segfaults (although I didn’t see any segfaults myself! unless this is a stage2 build?)
>
> Reverting rr258180 also fixed my stage2 builds, I'll try with r257886 later on.

Strange, I haven't been able to reproduce these test failures. I ran
the release script on the tip of 3.8, both for x86_64 and i686. I
didn't try running under msan, though.

Anyway, sounds like r257886 should be merged, so I've done that in
r258510. Please let me know if that improves things.

Thanks for tracking this down!

 - Hans