[llvm] r263325 - [X86] Make sure we do not clobber RBX with cmpxchg when used as a base pointer.

[Quentin Colombet via llvm-commits]

> On Mar 11, 2016, at 6:54 PM, Joerg Sonnenberger via llvm-commits <llvm-commits at lists.llvm.org> wrote:
> 
> On Sat, Mar 12, 2016 at 02:25:28AM -0000, Quentin Colombet via llvm-commits wrote:
>> Author: qcolombet
>> Date: Fri Mar 11 20:25:27 2016
>> New Revision: 263325
>> 
>> URL: http://llvm.org/viewvc/llvm-project?rev=263325&view=rev
>> Log:
>> [X86] Make sure we do not clobber RBX with cmpxchg when used as a base pointer.
> 
> Is this an issue we hit in 3.8 as well?

Yes, it is.
The bug has been here for 5 years already, though.

Cheers,
-Quentin

> 
> Joerg
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