[Mesa-dev] "glsl: Vectorize multiple scalar assignments" (mesa 4bd6e0d) breaks League of Legends on wine

[Andrew Guertin]

On 02/08/2014 02:41 AM, Matt Turner wrote:
> On Fri, Feb 7, 2014 at 10:22 PM, Andrew Guertin <lists at dolphinling.net> wrote:
>> Hi,
>>
>> I updated mesa and started getting some bad behavior in League of Legends
>> (played through wine). After starting a game, upon hovering any of the skill
>> buttons, instead of an info tooltip appearing, the whole screen is covered
>> in grey. Some other problems are visible too, like the options menu missing
>> most of its text.
>>
>> I bisected down to
>>
>> 4bd6e0d7c69b304be88996a6c2b96ce7d996e627 is the first bad commit
>> commit 4bd6e0d7c69b304be88996a6c2b96ce7d996e627
>> Author: Matt Turner <mattst88 at gmail.com>
>> Date:   Sat Dec 21 11:28:05 2013 -0800
>>
>>      glsl: Vectorize multiple scalar assignments
>>
>>      Reduces vertex shader instruction counts in DOTA2 by 6.42%, L4D2 by
>>      4.61%, and CS:GO by 5.71%.
>>
>>      total instructions in shared programs: 1500153 -> 1498191 (-0.13%)
>>      instructions in affected programs:     59919 -> 57957 (-3.27%)
>>
>>      Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
>>
>>
>> System info:
>> CPU: i7-3770
>> GPU: HD 4000
>> Kernel: 3.12
>>
>> I am not subscribed to this mailing list, so please keep me cc'd.
>>
>> Thanks,
>> --Andrew
>
> Presumably you have the following commits on top of that, and none of
> them affect it?
>
> 8e2b8bd0
> 37f1903e
> 60654421

Yes, I was up to date with master when I first noticed this, probably 
882e98e5, so all of those were included.

> Could you send me (privately) or file a bug report with the output of
> the game running with MESA_GLSL=dump ?

I've just spent about an hour trying to do this and failing. I get none 
of the output when running League of Legends. I get output when running 
glxgears, and when running FurMark through wine, but none with LoL. I 
also tried MESA_GLSL=log, which again worked with FurMark but had no 
result with LoL.

--Andrew