[Mesa-dev] radv: Support for control flow attributes (SPIR-V: Unroll, DontUnroll and maybe Flatten, DontFlatten)

[Panagiotis Christopoulos Charitos]

Hi,

I have multiple shaders that are part of my opensource engine and I see
VGPR usage improvements (on AMDVLK).

I can gather a few and attach them here. They can be in glsl or SPIRV
forms. Will that work or did I misunderstood the question?

Panagiotis Christopoulos Charitos
www.ancient-ritual.com <http://ancient-ritual.com>
www.anki3d.org

On Mon, Apr 30, 2018 at 12:20 PM, Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl
> wrote:

> We can look at passing it through to the optimizations. Do you have
> any particular shaders where you are interested in the use of these?
>
> On Sat, Apr 28, 2018 at 3:02 PM, Panagiotis Christopoulos Charitos
> <godlike at ancient-ritual.com> wrote:
> > Hi,
> >
> > SPIR-V supports a few control flow decorations. These decorations are
> > exposed in glslang as well as part of GL_EXT_control_flow_attributes
> > extension.
> >
> > AMDVLK's compiler supports those decorations and when used it may result
> in
> > lower VGPR usage.
> >
> > On the other hand RADV seems to ignore them.
> >
> > Does it make sense to support them as well? Is yes,  are there any plans?
> >
> > PS: I've built mesa with LLVM 6.0.0
> >
> >
> > Panagiotis Christopoulos Charitos
> > www.ancient-ritual.com
> > www.anki3d.org
> >
> > _______________________________________________
> > mesa-dev mailing list
> > mesa-dev at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/mesa-dev
> >
>
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