[Bug 108531] [skl DXVK] GPU hang with Megadimension Neptunia VIIR

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108531

Danylo <danylo.piliaiev at gmail.com> changed:

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                 CC|                            |danylo.piliaiev at gmail.com

--- Comment #6 from Danylo <danylo.piliaiev at gmail.com> ---
I've tried to look into the issue but performance made it extremely
problematic.

So I tried to look what's wrong with the performance first and why main menu is
so laggy. The main culprit was one draw call which did some kind of
post-processing (I don't really know its intention).

This is its compilation result:

SIMD8 shader: 3619 instructions. 2 loops. 230252 cycles. 197:368 spills:fills.
Promoted 9 constants. Compacted 57904 to 36320 bytes (37%)

That's the only such shader I found during the attempt to get past main menu.

I'll attach archive with RenderDoc trace (see call 159) of a frame and the
shader in question.

My hardware is i7-7500U, HD Graphics 620 + latest Mesa git

I have failed to see any obvious (for me) issues with processing of the shader
which may lead to such outcome, even the initial shader (dxbc) doesn't look
good for me.

Someone more knowledgeable than me should look at it.

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