cd0cff951a
The code here handled stores of actual 3-byte values (8-bit, 3-component), but didn't
correctly handle stores of larger 8-bit vectors that were constrained by write mask to
just 3 bytes. In that case, the pad-to-vec4 step was unnecessary and problematic.
Seen in CL CTS test_basic vector_swizzle test group for char3 with CLOn12.
Fixes: c70d94a8 ("nir_lower_mem_access_bit_sizes: Support unaligned stores via a pair of atomics")
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26034>
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