On Thu, Jul 21, 2022 at 2:45 AM Henri Verbeet <hverbeet@gmail.com> wrote:

So what this compile option then comes down to is using either the
declared UAV type, or SpvImageFormatUnknown. And when not using
SpvImageFormatUnknown, there's arguably still a bug of ignoring
component counts. We could opt to not fix that bug, or fail shader
compilation for those formats, but it doesn't seem terribly hard to
fix, and I don't think there are that many additional formats anyway.

What do you propose to do for component counts? UAVs with < 4 components are still declared in DXBC as vec4, and loads declare e.g. u1.xyzw as the source. Information about the actual component count seems to be missing. It is stored in DXIL, so maybe it can be used there, but not for SM < 6.