[llvm] r252368 - Add 'notail' marker for call instructions.

[Akira Hatanaka via llvm-commits]

Added a comment in r261141.

> On Feb 11, 2016, at 4:23 PM, Hans Wennborg <hans at chromium.org> wrote:
> 
> On Fri, Nov 6, 2015 at 3:55 PM, Akira Hatanaka via llvm-commits
> <llvm-commits at lists.llvm.org> wrote:
>> Author: ahatanak
>> Date: Fri Nov  6 17:55:38 2015
>> New Revision: 252368
>> 
>> URL: http://llvm.org/viewvc/llvm-project?rev=252368&view=rev
>> Log:
>> Add 'notail' marker for call instructions.
>> 
>> This marker prevents optimization passes from adding 'tail' or
>> 'musttail' markers to a call. Is is used to prevent tail call
>> optimization from being performed on the call.
>> 
>> rdar://problem/22667622
>> 
>> Differential Revision: http://reviews.llvm.org/D12923
> 
> Something for the release notes?
> 
> Thanks,
> Hans