[shaders][msl] Enable zero_initialize_workgroup_memory setting
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raphlinus
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Sep 21, 2023
The shaders all now pass the control flow uniformity validation check, so we don't need to keep it disabled.
Zero-initializing workgroup memory works around a Metal driver bug that can cause the tile_alloc and coarse stages to freeze up the system when running natively on Metal due to their use of `workgroupUniformLoad`. See gfx-rs/naga#2482 for more details about this bug. Zero-initializing workgroup memory also makes the native Metal shaders match the behavior of the current wgpu runner and the invariants of the original WGSL that the shaders were authored in.
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Zero-initializing workgroup memory works around a Metal driver bug that can cause the tile_alloc and coarse stages to freeze up the system when running natively on Metal due to their use of
workgroupUniformLoad. See gfx-rs/wgpu#4500 for more details about this bug.Zero-initializing workgroup memory also makes the native Metal shaders match the behavior of the current wgpu runner and the invariants of the original WGSL that the shaders were authored in.
In addition, this PR enables the
CONTROL_FLOW_UNIFORMITYvalidation check.