[Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96835

            Bug ID: 96835
           Summary: "gallium: Force blend color to 16-byte alignment"
                    crash with "-march=native -O3" causes some 32bit games
                    to crash
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: raffarti at zoho.com
        QA Contact: dri-devel at lists.freedesktop.org

Building mesa with "-march=native -O3" causes some 32 bit games to crash at
start since "gallium: Force blend color to 16-byte alignment" patch
(d8d6091a846ac2a40a011d512d6d57f6c8442e6a). This happens using both opengl or
nine. Everything works as expected using "-march=native -O2".
tested games are:
Native:
The Talos Princible (32 bit) -- Always crash
The Talos Princible (64 bit) -- Works
Wine (32bit):
League of Legends -- Always crash
World of Warcraft 1.21 -- Always crash
World of Warcraft 2.4.3 -- Sometimes crashes
World of Warcraft 3.3.5 -- Most times works

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