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A 64-bit atomic load/store should be considered entirely out-of-bounds if any part of it is out-of-bounds. Since we implemented these as 32-bit vec2 load/store, it would have been possible for the first half to be in-bounds while the second half is out-of-bounds. From 9.6.1. Robust Buffer Access of Vulkan 1.4.324 specification: > Any non-atomic access to a uniform, storage, uniform texel, or storage > texel buffer wider than 32-bits may be treated as multiple 32-bit > accesses that are separately bounds checked. Signed-off-by: Rhys Perry <pendingchaos02@gmail.com> Reviewed-by: Daniel Schürmann <daniel@schuermann.dev> Reviewed-by: Georg Lehmann <dadschoorse@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36602>