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Add regression test for #613 #727

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Merged
vchuravy merged 1 commit into from
Jul 6, 2026
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Add regression test for #613 #727

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16 changes: 16 additions & 0 deletions test/test.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -165,6 +165,22 @@ function unittest_testsuite(Backend, backend_str, backend_mod, BackendArrayT; sk
@test all(Array(A) .== 1:5)
end

@conditional_testset "2D ndrange with scalar workgroupsize" skip_tests begin
# A scalar workgroupsize combined with a 2D ndrange pads the first
# dimension of the iteration space to a multiple of the workgroupsize.
# The padded work items must be masked, otherwise their linear index
# reaches past `prod(dims)` (issue #613).
backend = Backend()
dims = (33, 32)
wgsize = 16
padding = cld(dims[1], wgsize) * wgsize - dims[1]
A = KernelAbstractions.zeros(backend, Int, prod(dims) + padding)
index_linear_global(backend, wgsize)(A, ndrange = dims)
synchronize(backend)
@test all(Array(A)[1:prod(dims)] .== 1:prod(dims))
@test all(Array(A)[(prod(dims) + 1):end] .== 0)
end

@kernel function constarg(A, @Const(B))
I = @index(Global)
@inbounds A[I] = B[I]
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