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Fix type instability when setindex!! #549

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merged 8 commits into from
Nov 2, 2023
Merged

Fix type instability when setindex!! #549

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c20eb01
Add `BangBang.possible` for general arrays
sunxd3 Oct 24, 2023
88fdc24
Remove redundant BangBang.possible
sunxd3 Oct 24, 2023
a9b51f1
add comments rt JuliaFold2 PR
sunxd3 Oct 31, 2023
471b899
copy tor's fix to JuliaFolds here
sunxd3 Nov 1, 2023
c4c1105
add BangBang prefix to the functions
sunxd3 Nov 1, 2023
1bb3c49
remove tests of possible, no longer needed
sunxd3 Nov 1, 2023
39f4ff1
Add Tor's tests
sunxd3 Nov 1, 2023
3ca938c
Import `setindex!!`
sunxd3 Nov 1, 2023
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29 changes: 3 additions & 26 deletions src/utils.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -538,34 +538,11 @@ function remove_parent_lens(vn_parent::VarName{sym}, vn_child::VarName{sym}) whe
end

# HACK: All of these are related to https://github.com/JuliaFolds/BangBang.jl/issues/233
# and https://github.com/JuliaFolds/BangBang.jl/pull/238.
# and https://github.com/JuliaFolds/BangBang.jl/pull/238, https://github.com/JuliaFolds2/BangBang.jl/pull/16.
# HACK(torfjelde): Avoids type-instability in `dot_assume` for `SimpleVarInfo`.
function BangBang.possible(
::typeof(BangBang._setindex!), ::C, ::T, ::Colon, ::Integer
) where {C<:AbstractMatrix,T<:AbstractVector}
return BangBang.implements(setindex!, C) &&
promote_type(eltype(C), eltype(T)) <: eltype(C)
end
function BangBang.possible(
::typeof(BangBang._setindex!), ::C, ::T, ::AbstractPPL.ConcretizedSlice, ::Integer
) where {C<:AbstractMatrix,T<:AbstractVector}
return BangBang.implements(setindex!, C) &&
promote_type(eltype(C), eltype(T)) <: eltype(C)
end
# HACK: Makes it possible to use ranges, etc. for setting a vector.
# For example, without this hack, BangBang.jl will consider
#
# x[1:2] = [1, 2]
#
# as NOT supported. This results is calling the immutable
# `BangBang.setindex` instead, which also ends up expanding the
# type of the containing array (`x` in the above scenario) to
# have element type `Any`.
# The below code just, correctly, marks this as possible and
# thus we hit the mutable `setindex!` instead.
function BangBang.possible(
::typeof(BangBang._setindex!), ::C, ::T, ::AbstractVector{<:Integer}
) where {C<:AbstractVector,T<:AbstractVector}
::typeof(BangBang._setindex!), ::C, ::T, ::Vararg
) where {C<:AbstractArray,T<:AbstractArray}
return BangBang.implements(setindex!, C) &&
promote_type(eltype(C), eltype(T)) <: eltype(C)
end
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27 changes: 27 additions & 0 deletions test/utils.jl
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Expand Up @@ -48,4 +48,31 @@
x = rand(dist)
@test vectorize(dist, x) == vec(x.UL)
end

@testset "BangBang.possible" begin
a = zeros(3, 3, 3, 3) # also allow varname concretization
svi = SimpleVarInfo(Dict(@varname(a) => a))
DynamicPPL.setindex!!(svi, ones(3, 2), @varname(a[1, 1:3, 1, 1:2]))
@test eltype(svi[@varname(a)]) != Any

DynamicPPL.setindex!!(svi, ones(3), @varname(a[1, 1, :, 1]))
@test eltype(svi[@varname(a)]) != Any

DynamicPPL.setindex!!(svi, [1, 2], @varname(a[[5, 8]]))
@test eltype(svi[@varname(a)]) != Any

DynamicPPL.setindex!!(
svi,
[1, 2],
@varname(a[[CartesianIndex(1, 1, 3, 1), CartesianIndex(1, 1, 3, 2)]])
)
@test eltype(svi[@varname(a)]) != Any

svi = SimpleVarInfo(Dict(@varname(b) => [zeros(2), zeros(3)]))
DynamicPPL.setindex!!(svi, ones(2), @varname(b[1]))
@test eltype(svi[@varname(b)][1]) != Any

DynamicPPL.setindex!!(svi, ones(2), @varname(b[2][1:2]))
@test eltype(svi[@varname(b)][2]) != Any
end
end
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