[Bug 99078] Desktop icons oversaturated with red after December 11 2016 update

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99078

--- Comment #14 from Furkan <falaca at gmail.com> ---
I ran a bisect on the LLVM 3.9 branch, and found the bad commit: 

commit 25e2616626caafb896517e18cd8aa724fba2b200
Author: Tom Stellard <thomas.stellard at amd.com>
Date:   Tue Nov 29 03:41:28 2016 +0000

    Merging r280589:

    ------------------------------------------------------------------------
    r280589 | nhaehnle | 2016-09-03 05:26:32 -0700 (Sat, 03 Sep 2016) | 19
lines

    AMDGPU: Fix an interaction between WQM and polygon stippling

    Summary:
    This fixes a rare bug in polygon stippling with non-monolithic pixel
shaders.

    The underlying problem is as follows: the prolog part contains the polygon
    stippling sequence, i.e. a kill. The main part then enables WQM based on
the
    _reduced_ exec mask, effectively undoing most of the polygon stippling.

    Since we cannot know whether polygon stippling will be used, the main part
    of a non-monolithic shader must always return to exact mode to fix this
    problem.

    Reviewers: arsenm, tstellarAMD, mareko

    Subscribers: arsenm, llvm-commits, kzhuravl

    Differential Revision: https://reviews.llvm.org/D23131

    ------------------------------------------------------------------------

    git-svn-id:
https://llvm.org/svn/llvm-project/llvm/branches/release_39@288105
91177308-0d34-0410-b5e6-96231b3b80d8

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