[Bug 106393] glsl-fs-shader-stencil-export hangs forever

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106393

--- Comment #2 from Iago Toral <itoral at igalia.com> ---
(In reply to Mark Janes from comment #1)
> I reverted the bisected patch, and the subsequent patch enabling
> shaderInt16.  Mesa CI was inoperable with the spinning piglit tests.

We had never seen this reported by Jenkins but I can confirm that we can
reproduce the problem locally, was this test temporarily disabled or something?
or could it be silently skipped due to the long run time? We sent the series to
Jenkins prior to landing it in master.

Anyway, we have looked into it and it seems the problem is a MOV with a Byte
type:

mov(8)          g127<1>UB       g2<32,8,4>UB

These need special handling in the compiler, Chema had already found about this
while adding support for 8-bit integers, we just weren't aware that the driver
already had a case where Byte types were already being used... I'll talk to
Chema about this but we probably already have the fix available.

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