[llvm] r295004 - [X86] Add MXCSR register

[Simon Pilgrim via llvm-commits]

On 08/03/2017 18:48, Davide Italiano wrote:

> On Tue, Mar 7, 2017 at 6:26 PM, Davide Italiano <davide at freebsd.org> wrote:
>> Sorry, I'm late.
>> I'm afraid the patch didn't help. I'll provide a short repro soon.
> You can find the reduced repro attached. Sorry it took so long, but I
> haven't gotten around to it until this morning.
> The test is synthetic enough to diagnose the problem, but probably can
> be reduced further. As we're hitting this on one of our games, please
> let me know if you can take a look (or I can take over, in that case I
> might need some guidance, maybe).

An additional issue is that this commit causes sse-intrinsics-x86.ll and 
sse-intrinsics-fast-isel.ll to fail if -verify-machineinstr is enabled 
(PR32146). It fails with a similar error message so it may be corrected 
with the same fix as for Davide's repro.