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Below are the list of all the individual changes, which are a good order in which to review this CL. Core changes: - Change the tracking in the frontend to produce a synchronization scope per dispatch instead of per compute pass. Some bindgroups might not be part of any synchronization scopes so we also track all the referenced resources on the side so they can be checked during Queue::Submit validation. - Fix clearing in the GL and Metal backends to use the per-dispatch synchronization scopes. - Fix the Vulkan backend to use the per dispatch synchronization scopes to produce the correct pipeline barriers. This allows the removal of previous logic that was subtly incorrect for Indirect buffer. This allows the merging of the Compute and Render DescriptorSetTracker into a single small helper class. - D3D12 changes are similar to Vulkan, but the simplification is just a the suppression of a branch with a lot of code in BindGroupStateTracker. Test changes: - Fixup all the ResourceUsageTracking tests to follow the WebGPU spec for synchronization scopes (fixing a lot of TODOs). - Add additional tests checking that Indirect buffers are not allowed to be used as a writeable storage in the same synchronization scope. - Add tests for Queue::Submit validation correctly taking into account resources that are bound but unused in compute passes. - Add an end2end test for using a buffer as Indirect and Storage at the same time in a DispatchIndirect, which would previously produce incorrect barriers in the Vulkan and D3D12 backends. Other small changes (that I was to lazy to put in a different CL): - Add the utils::MakePipelineLayout helper function. - Fix Indirect not being in the list of readonly buffer usages (caught by a test added in this CL). Bug: dawn:632 Change-Id: I77263c3535a4ba995faccbf26255da9a2f6ed3b5 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/49887 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Stephen White <senorblanco@chromium.org>