[llvm] r270344 - [AVX512] Add a couple patterns to fix some cases where two vector mask inversions could appear in a row.

[Rafael Espíndola via llvm-commits]

On 24 May 2016 at 21:48, Craig Topper <craig.topper at gmail.com> wrote:
> What sort of regression? The types in that pattern are only legal in AVX512
> so I don't think a non AVX512 could even reach that pattern through isel.
>

Compiled program freezes. I only noticed on the bot so far, but
tomorrow I will try doing two builds locally to see if I can reproduce
any .o changing.

Thanks,
Rafael