R600: Fix min/max matching problems with unordered compares

[Matt Arsenault]

> On Dec 11, 2014, at 9:01 PM, Tom Stellard <tom at stellard.net> wrote:
> 
> On Thu, Dec 11, 2014 at 06:19:29PM -0500, Matt Arsenault wrote:
>> 
>>> On Nov 28, 2014, at 5:16 PM, Matt Arsenault <arsenm2 at gmail.com> wrote:
>>> 
>>> 
>>>> On Nov 21, 2014, at 5:36 AM, Marek Olšák <maraeo at gmail.com> wrote:
>>>> 
>>>> Hi Matt,
>>>> 
>>>> I've just tested your patches. They don't fix the bug, but there might
>>>> be nothing wrong with them, because I think the legacy opcodes
>>>> themselves are the culprit and switching Mesa to use the mixnum/maxnum
>>>> intrinsics fixes the issue too.
>>>> 
>>>> Marek
>>>> 
>>>> On Thu, Nov 20, 2014 at 12:27 AM, Matt Arsenault <arsenm2 at gmail.com> wrote:
>>>>> These should fix https://bugs.freedesktop.org/show_bug.cgi?id=86432
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> _______________________________________________
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>>>>> llvm-commits at cs.uiuc.edu
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>>>>> 
>>> 
>>> 
>>> Here are updated patches which include removing isCommutable from the MachineInstrs
>>> 
>>> <0001-R600-SI-Don-t-promote-f32-select-to-i32.patch><0002-R600-SI-fmin-fmax_legacy-are-not-associative.patch><0003-R600-Fix-min-max-matching-problems-with-unordered-co.patch>
>> 
>> 
>> Rebased
>> 
> 
> LGTM.
> 
> 
> 
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r224092-r224094
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