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inference.jl
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inference.jl
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# This file is a part of Julia. License is MIT: https://julialang.org/license
# tests for Core.Compiler correctness and precision
import Core.Compiler: Const, Conditional, ⊑, ReturnNode, GotoIfNot
isdispatchelem(@nospecialize x) = !isa(x, Type) || Core.Compiler.isdispatchelem(x)
using Random, Core.IR
using InteractiveUtils
include("irutils.jl")
f39082(x::Vararg{T}) where {T <: Number} = x[1]
let ast = only(code_typed(f39082, Tuple{Vararg{Rational}}))[1]
@test ast.slottypes == Any[Const(f39082), Tuple{Vararg{Rational}}]
end
let ast = only(code_typed(f39082, Tuple{Rational, Vararg{Rational}}))[1]
@test ast.slottypes == Any[Const(f39082), Tuple{Rational, Vararg{Rational}}]
end
# demonstrate some of the type-size limits
@test Core.Compiler.limit_type_size(Ref{Complex{T} where T}, Ref, Ref, 100, 0) == Ref
@test Core.Compiler.limit_type_size(Ref{Complex{T} where T}, Ref{Complex{T} where T}, Ref, 100, 0) == Ref{Complex{T} where T}
let comparison = Tuple{X, X} where X<:Tuple
sig = Tuple{X, X} where X<:comparison
ref = Tuple{X, X} where X
@test Core.Compiler.limit_type_size(sig, comparison, comparison, 100, 100) == Tuple{Tuple, Tuple}
@test Core.Compiler.limit_type_size(sig, ref, comparison, 100, 100) == Tuple{Any, Any}
@test Core.Compiler.limit_type_size(Tuple{sig}, Tuple{ref}, comparison, 100, 100) == Tuple{Tuple{Any, Any}}
@test Core.Compiler.limit_type_size(ref, sig, Union{}, 100, 100) == ref
end
let ref = Tuple{T, Val{T}} where T<:Val
sig = Tuple{T, Val{T}} where T<:(Val{T} where T<:Val)
@test Core.Compiler.limit_type_size(sig, ref, Union{}, 100, 100) == Tuple{Val, Val}
@test Core.Compiler.limit_type_size(ref, sig, Union{}, 100, 100) == ref
end
let ref = Tuple{T, Val{T}} where T<:(Val{T} where T<:(Val{T} where T<:(Val{T} where T<:Val)))
sig = Tuple{T, Val{T}} where T<:(Val{T} where T<:(Val{T} where T<:(Val{T} where T<:(Val{T} where T<:Val))))
@test Core.Compiler.limit_type_size(sig, ref, Union{}, 100, 100) == Tuple{Val, Val}
@test Core.Compiler.limit_type_size(ref, sig, Union{}, 100, 100) == ref
end
let t = Tuple{Ref{T},T,T} where T, c = Tuple{Ref, T, T} where T # #36407
@test t <: Core.Compiler.limit_type_size(t, c, Union{}, 1, 100)
end
# obtain Vararg with 2 undefined fields
let va = ccall(:jl_type_intersection_with_env, Any, (Any, Any), Tuple{Tuple}, Tuple{Tuple{Vararg{Any, N}}} where N)[2][1]
@test Core.Compiler.__limit_type_size(Tuple, va, Core.svec(va, Union{}), 2, 2) === Tuple
end
mutable struct TS14009{T}; end
let A = TS14009{TS14009{TS14009{TS14009{TS14009{T}}}}} where {T},
B = Base.rewrap_unionall(TS14009{Base.unwrap_unionall(A)}, A)
@test Core.Compiler.Compiler.limit_type_size(B, A, A, 2, 2) == TS14009
end
# issue #42835
@test !Core.Compiler.type_more_complex(Int, Any, Core.svec(), 1, 1, 1)
@test !Core.Compiler.type_more_complex(Int, Type{Int}, Core.svec(), 1, 1, 1)
@test !Core.Compiler.type_more_complex(Type{Int}, Any, Core.svec(), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{Int}}, Any, Core.svec(), 1, 1, 1)
@test Core.Compiler.limit_type_size(Type{Int}, Any, Union{}, 0, 0) == Type{Int}
@test Core.Compiler.type_more_complex(Type{Type{Int}}, Type{Int}, Core.svec(Type{Int}), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{Int}}, Int, Core.svec(Type{Int}), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{Int}}, Any, Core.svec(), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{Type{Int}}}, Type{Type{Int}}, Core.svec(Type{Type{Int}}), 1, 1, 1)
@test Core.Compiler.type_more_complex(ComplexF32, Any, Core.svec(), 1, 1, 1)
@test !Core.Compiler.type_more_complex(ComplexF32, Any, Core.svec(Type{ComplexF32}), 1, 1, 1)
@test Core.Compiler.type_more_complex(ComplexF32, Type{ComplexF32}, Core.svec(), 1, 1, 1)
@test !Core.Compiler.type_more_complex(Type{ComplexF32}, Any, Core.svec(Type{Type{ComplexF32}}), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{ComplexF32}, Type{Type{ComplexF32}}, Core.svec(), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{ComplexF32}, ComplexF32, Core.svec(), 1, 1, 1)
@test Core.Compiler.limit_type_size(Type{ComplexF32}, ComplexF32, Union{}, 1, 1) == Type{<:Complex}
@test Core.Compiler.type_more_complex(Type{ComplexF32}, Any, Core.svec(), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{ComplexF32}}, Type{ComplexF32}, Core.svec(Type{ComplexF32}), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{ComplexF32}}, ComplexF32, Core.svec(ComplexF32), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{Type{ComplexF32}}}, Type{Type{ComplexF32}}, Core.svec(Type{ComplexF32}), 1, 1, 1)
# n.b. Type{Type{Union{}} === Type{Core.TypeofBottom}
@test !Core.Compiler.type_more_complex(Type{Union{}}, Any, Core.svec(), 1, 1, 1)
@test !Core.Compiler.type_more_complex(Type{Type{Union{}}}, Any, Core.svec(), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{Type{Union{}}}}, Any, Core.svec(), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{Type{Union{}}}}, Type{Type{Union{}}}, Core.svec(Type{Type{Union{}}}), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{Type{Type{Union{}}}}}, Type{Type{Type{Union{}}}}, Core.svec(Type{Type{Type{Union{}}}}), 1, 1, 1)
@test !Core.Compiler.type_more_complex(Type{1}, Type{2}, Core.svec(), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Union{Float32,Float64}}, Union{Float32,Float64}, Core.svec(Union{Float32,Float64}), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{Union{Float32,Float64}}}, Union{Float32,Float64}, Core.svec(Union{Float32,Float64}), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{Type{Union{Float32,Float64}}}, Type{Union{Float32,Float64}}, Core.svec(Type{Union{Float32,Float64}}), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{<:Union{Float32,Float64}}, Type{Union{Float32,Float64}}, Core.svec(Union{Float32,Float64}), 1, 1, 1)
@test Core.Compiler.type_more_complex(Type{<:Union{Float32,Float64}}, Any, Core.svec(Union{Float32,Float64}), 1, 1, 1)
# issue #49287
@test !Core.Compiler.type_more_complex(Tuple{Vararg{Tuple{}}}, Tuple{Vararg{Tuple}}, Core.svec(), 0, 0, 0)
@test Core.Compiler.type_more_complex(Tuple{Vararg{Tuple}}, Tuple{Vararg{Tuple{}}}, Core.svec(), 0, 0, 0)
# issue #51694
@test Core.Compiler.type_more_complex(
Base.Generator{Base.Iterators.Flatten{Array{Bool, 1}}, typeof(identity)},
Base.Generator{Array{Bool, 1}, typeof(identity)},
Core.svec(), 0, 0, 0)
@test Core.Compiler.type_more_complex(
Base.Generator{Base.Iterators.Flatten{Base.Generator{Array{Bool, 1}, typeof(identity)}}, typeof(identity)},
Base.Generator{Array{Bool, 1}, typeof(identity)},
Core.svec(), 0, 0, 0)
let # 40336
t = Type{Type{Type{Int}}}
c = Type{Type{Int}}
r = Core.Compiler.limit_type_size(t, c, c, 100, 100)
@test t !== r && t <: r
end
@test Core.Compiler.limit_type_size(Type{Type{Type{Int}}}, Type, Union{}, 0, 0) == Type{<:Type}
@test Core.Compiler.limit_type_size(Type{Type{Int}}, Type, Union{}, 0, 0) == Type{<:Type}
@test Core.Compiler.limit_type_size(Type{Int}, Type, Union{}, 0, 0) == Type{Int}
@test Core.Compiler.limit_type_size(Type{<:Int}, Type, Union{}, 0, 0) == Type{<:Int}
@test Core.Compiler.limit_type_size(Type{ComplexF32}, ComplexF32, Union{}, 0, 0) == Type{<:Complex} # added nesting
@test Core.Compiler.limit_type_size(Type{ComplexF32}, Type{ComplexF64}, Union{}, 0, 0) == Type{ComplexF32} # base matches
@test Core.Compiler.limit_type_size(Type{ComplexF32}, Type, Union{}, 0, 0) == Type{<:Complex}
@test_broken Core.Compiler.limit_type_size(Type{<:ComplexF64}, Type, Union{}, 0, 0) == Type{<:Complex}
@test Core.Compiler.limit_type_size(Type{<:ComplexF64}, Type, Union{}, 0, 0) == Type #50692
@test Core.Compiler.limit_type_size(Type{Union{ComplexF32,ComplexF64}}, Type, Union{}, 0, 0) == Type
@test_broken Core.Compiler.limit_type_size(Type{Union{ComplexF32,ComplexF64}}, Type, Union{}, 0, 0) == Type{<:Complex} #50692
@test Core.Compiler.limit_type_size(Type{Union{Float32,Float64}}, Type, Union{}, 0, 0) == Type
@test Core.Compiler.limit_type_size(Type{Union{Int,Type{Int}}}, Type{Type{Int}}, Union{}, 0, 0) == Type
@test Core.Compiler.limit_type_size(Type{Union{Int,Type{Int}}}, Union{Type{Int},Type{Type{Int}}}, Union{}, 0, 0) == Type
@test Core.Compiler.limit_type_size(Type{Union{Int,Type{Int}}}, Type{Union{Type{Int},Type{Type{Int}}}}, Union{}, 0, 0) == Type{Union{Int, Type{Int}}}
@test Core.Compiler.limit_type_size(Type{Union{Int,Type{Int}}}, Type{Type{Int}}, Union{}, 0, 0) == Type
@test Core.Compiler.limit_type_size(Type{Any}, Union{}, Union{}, 0, 0) ==
Core.Compiler.limit_type_size(Type{Any}, Any, Union{}, 0, 0) ==
Core.Compiler.limit_type_size(Type{Any}, Type, Union{}, 0, 0) ==
Type{Any}
# issue #43296 #43296
struct C43296{t,I} end
r43296(b) = r43296(typeof(b))
r43296(::Type) = nothing
r43296(::Nothing) = nonexistent
r43296(::Type{C43296{c,d}}) where {c,d} = f43296(r43296(c), e)
f43296(::Nothing, :) = nothing
f43296(g, :) = h
k43296(b, j, :) = l
k43296(b, j, ::Nothing) = b
i43296(b, j) = k43296(b, j, r43296(j))
@test only(Base.return_types(i43296, (Int, C43296{C43296{C43296{Val, Tuple}, Tuple}}))) == Int
abstract type e43296{a, j} <: AbstractArray{a, j} end
abstract type b43296{a, j, c, d} <: e43296{a, j} end
struct h43296{a, j, f, d, i} <: b43296{a, j, f, d} end
Base.ndims(::Type{f}) where {f<:e43296} = ndims(supertype(f))
Base.ndims(g::e43296) = ndims(typeof(g))
@test only(Base.return_types(ndims, (h43296{Any, 0, Any, Int, Any},))) == Int
@test Core.Compiler.unionlen(Union{}) == 1
@test Core.Compiler.unionlen(Int8) == 1
@test Core.Compiler.unionlen(Union{Int8, Int16}) == 2
@test Core.Compiler.unionlen(Union{Int8, Int16, Int32, Int64}) == 4
@test Core.Compiler.unionlen(Tuple{Union{Int8, Int16, Int32, Int64}}) == 1
@test Core.Compiler.unionlen(Union{Int8, Int16, Int32, T} where T) == 1
@test Core.Compiler.unioncomplexity(Union{}) == 0
@test Core.Compiler.unioncomplexity(Int8) == 0
@test Core.Compiler.unioncomplexity(Val{Union{Int8, Int16, Int32, Int64}}) == 0
@test Core.Compiler.unioncomplexity(Union{Int8, Int16}) == 1
@test Core.Compiler.unioncomplexity(Union{Int8, Int16, Int32, Int64}) == 3
@test Core.Compiler.unioncomplexity(Tuple{Union{Int8, Int16, Int32, Int64}}) == 3
@test Core.Compiler.unioncomplexity(Union{Int8, Int16, Int32, T} where T) == 3
@test Core.Compiler.unioncomplexity(Tuple{Val{T}, Union{Int8, Int16}, Int8} where T<:Union{Int8, Int16, Int32, Int64}) == 3
@test Core.Compiler.unioncomplexity(Tuple{Vararg{Tuple{Union{Int8, Int16}}}}) == 2
@test Core.Compiler.unioncomplexity(Tuple{Vararg{Symbol}}) == 1
@test Core.Compiler.unioncomplexity(Tuple{Vararg{Union{Symbol, Tuple{Vararg{Symbol}}}}}) == 3
@test Core.Compiler.unioncomplexity(Tuple{Vararg{Union{Symbol, Tuple{Vararg{Union{Symbol, Tuple{Vararg{Symbol}}}}}}}}) == 5
@test Core.Compiler.unioncomplexity(Tuple{Vararg{Union{Symbol, Tuple{Vararg{Union{Symbol, Tuple{Vararg{Union{Symbol, Tuple{Vararg{Symbol}}}}}}}}}}}) == 7
# PR 22120
function tuplemerge_test(a, b, r, commutative=true)
@test r == Core.Compiler.tuplemerge(a, b)
if commutative
@test r == Core.Compiler.tuplemerge(b, a)
else
@test_broken r == Core.Compiler.tuplemerge(b, a)
end
end
tuplemerge_test(Tuple{Int}, Tuple{String}, Tuple{Union{Int, String}})
tuplemerge_test(Tuple{Int}, Tuple{String, String}, Tuple)
tuplemerge_test(Tuple{Vararg{Int}}, Tuple{String}, Tuple)
tuplemerge_test(Tuple{Int}, Tuple{Int, Int},
Tuple{Vararg{Int}})
tuplemerge_test(Tuple{Integer}, Tuple{Int, Int},
Tuple{Vararg{Integer}})
tuplemerge_test(Tuple{}, Tuple{Int, Int},
Tuple{Vararg{Int}})
tuplemerge_test(Tuple{}, Tuple{Complex},
Tuple{Vararg{Complex}})
tuplemerge_test(Tuple{ComplexF32}, Tuple{ComplexF32, ComplexF64},
Tuple{Vararg{Complex}})
tuplemerge_test(Tuple{Vararg{ComplexF32}}, Tuple{Vararg{ComplexF64}},
Tuple{Vararg{Complex}})
tuplemerge_test(Tuple{}, Tuple{ComplexF32, Vararg{Union{ComplexF32, ComplexF64}}},
Tuple{Vararg{Union{ComplexF32, ComplexF64}}})
tuplemerge_test(Tuple{ComplexF32}, Tuple{ComplexF32, Vararg{Union{ComplexF32, ComplexF64}}},
Tuple{Vararg{Union{ComplexF32, ComplexF64}}})
tuplemerge_test(Tuple{ComplexF32, ComplexF32, ComplexF32}, Tuple{ComplexF32, Vararg{Union{ComplexF32, ComplexF64}}},
Tuple{Vararg{Union{ComplexF32, ComplexF64}}})
tuplemerge_test(Tuple{}, Tuple{Union{ComplexF64, ComplexF32}, Vararg{Union{ComplexF32, ComplexF64}}},
Tuple{Vararg{Union{ComplexF32, ComplexF64}}})
tuplemerge_test(Tuple{ComplexF64, ComplexF64, ComplexF32}, Tuple{Vararg{Union{ComplexF32, ComplexF64}}},
Tuple{Vararg{Complex}}, false)
tuplemerge_test(Tuple{}, Tuple{Complex, Vararg{Union{ComplexF32, ComplexF64}}},
Tuple{Vararg{Complex}})
@test Core.Compiler.tmerge(Tuple{}, Union{Nothing, Tuple{ComplexF32, ComplexF32}}) ==
Union{Nothing, Tuple{}, Tuple{ComplexF32, ComplexF32}}
@test Core.Compiler.tmerge(Tuple{}, Union{Nothing, Tuple{ComplexF32}, Tuple{ComplexF32, ComplexF32}}) ==
Union{Nothing, Tuple{Vararg{ComplexF32}}}
@test Core.Compiler.tmerge(Union{Nothing, Tuple{ComplexF32}}, Union{Nothing, Tuple{ComplexF32, ComplexF32}}) ==
Union{Nothing, Tuple{ComplexF32}, Tuple{ComplexF32, ComplexF32}}
@test Core.Compiler.tmerge(Union{Nothing, Tuple{}, Tuple{ComplexF32}}, Union{Nothing, Tuple{ComplexF32, ComplexF32}}) ==
Union{Nothing, Tuple{Vararg{ComplexF32}}}
@test Core.Compiler.tmerge(Vector{Int}, Core.Compiler.tmerge(Vector{String}, Vector{Bool})) ==
Union{Vector{Bool}, Vector{Int}, Vector{String}}
@test Core.Compiler.tmerge(Vector{Int}, Core.Compiler.tmerge(Vector{String}, Union{Vector{Bool}, Vector{Symbol}})) == Vector
@test Core.Compiler.tmerge(Base.BitIntegerType, Union{}) === Base.BitIntegerType
@test Core.Compiler.tmerge(Union{}, Base.BitIntegerType) === Base.BitIntegerType
@test Core.Compiler.tmerge(Core.Compiler.fallback_ipo_lattice, Core.Compiler.InterConditional(1, Int, Union{}), Core.Compiler.InterConditional(2, String, Union{})) === Core.Compiler.Const(true)
# test issue behind https://github.com/JuliaLang/julia/issues/50458
@test Core.Compiler.tmerge(Nothing, Tuple{Base.BitInteger, Int}) == Union{Nothing, Tuple{Base.BitInteger, Int}}
@test Core.Compiler.tmerge(Union{Nothing, Tuple{Int, Int}}, Tuple{Base.BitInteger, Int}) == Union{Nothing, Tuple{Any, Int}}
@test Core.Compiler.tmerge(Nothing, Tuple{Union{Char, String, SubString{String}, Symbol}, Int}) == Union{Nothing, Tuple{Union{Char, String, SubString{String}, Symbol}, Int}}
@test Core.Compiler.tmerge(Union{Nothing, Tuple{Char, Int}}, Tuple{Union{Char, String, SubString{String}, Symbol}, Int}) == Union{Nothing, Tuple{Union{Char, String, SubString{String}, Symbol}, Int}}
@test Core.Compiler.tmerge(Nothing, Tuple{Integer, Int}) == Union{Nothing, Tuple{Integer, Int}}
@test Core.Compiler.tmerge(Union{Nothing, Tuple{Int, Int}}, Tuple{Integer, Int}) == Union{Nothing, Tuple{Integer, Int}}
@test Core.Compiler.tmerge(Union{Nothing, AbstractVector{Int}}, Vector) == Union{Nothing, AbstractVector}
@test Core.Compiler.tmerge(Union{Nothing, AbstractVector{Int}}, Matrix) == Union{Nothing, AbstractArray}
@test Core.Compiler.tmerge(Union{Nothing, AbstractVector{Int}}, Matrix{Int}) == Union{Nothing, AbstractArray{Int}}
@test Core.Compiler.tmerge(Union{Nothing, AbstractVector{Int}}, Array) == Union{Nothing, AbstractArray}
@test Core.Compiler.tmerge(Union{Nothing, AbstractArray{Int}}, Vector) == Union{Nothing, AbstractArray}
@test Core.Compiler.tmerge(Union{Nothing, AbstractVector}, Matrix{Int}) == Union{Nothing, AbstractArray}
@test Core.Compiler.tmerge(Union{Nothing, AbstractFloat}, Integer) == Union{Nothing, AbstractFloat, Integer}
# test that recursively more complicated types don't widen all the way to Any when there is a useful valid type upper bound
# Specifically test with base types of a trivial type, a simple union, a complicated union, and a tuple.
for T in (Nothing, Base.BitInteger, Union{Int, Int32, Int16, Int8}, Tuple{Int, Int})
Ta, Tb = T, T
for i in 1:10
Ta = Union{Tuple{Ta}, Nothing}
Tb = Core.Compiler.tmerge(Tuple{Tb}, Nothing)
@test Ta <: Tb <: Union{Nothing, Tuple}
end
end
struct SomethingBits
x::Base.BitIntegerType
end
@test Base.return_types(getproperty, (SomethingBits, Symbol)) == Any[Base.BitIntegerType]
# issue 9770
@noinline x9770() = false
function f9770(x)
return if x9770()
g9770(:a, :foo)
else
x
end
end
function g9770(x,y)
return if isa(y, Symbol)
f9770(x)
else
g9770(:a, :foo)
end
end
@test g9770(:a, "c") === :a
@test g9770(:b, :c) === :b
# issue #1628
mutable struct I1628{X}
x::X
end
let
# here the potential problem is that the run-time value of static
# parameter X in the I1628 constructor is (DataType,DataType),
# but type inference will track it more accurately as
# (Type{Integer}, Type{Int}).
f1628() = I1628((Integer,Int))
@test isa(f1628(), I1628{Tuple{DataType,DataType}})
end
let
fT(x::T) where {T} = T
@test fT(Any) === DataType
@test fT(Int) === DataType
@test fT(Type{Any}) === DataType
@test fT(Type{Int}) === DataType
ff(x::Type{T}) where {T} = T
@test ff(Type{Any}) === Type{Any}
@test ff(Type{Int}) === Type{Int}
@test ff(Any) === Any
@test ff(Int) === Int
end
# issue #3182
f3182(::Type{T}) where {T} = 0
f3182(x) = 1
function g3182(t::DataType)
# tricky thing here is that DataType is a concrete type, and a
# subtype of Type, but we cannot infer the T in Type{T} just
# by knowing (at compile time) that the argument is a DataType.
# however the ::Type{T} method should still match at run time.
return f3182(t)
end
@test g3182(Complex.body) == 0
# issue #5906
abstract type Outer5906{T} end
struct Inner5906{T}
a:: T
end
struct Empty5906{T} <: Outer5906{T}
end
struct Hanoi5906{T} <: Outer5906{T}
a::T
succ :: Outer5906{Inner5906{T}}
Hanoi5906{T}(a) where T = new(a, Empty5906{Inner5906{T}}())
end
function f5906(h::Hanoi5906{T}) where T
if isa(h.succ, Empty5906) return end
f5906(h.succ)
end
# can cause infinite recursion in type inference via instantiation of
# the type of the `succ` field
@test f5906(Hanoi5906{Int}(1)) === nothing
# issue on the flight from DFW
# (type inference deducing Type{:x} rather than Symbol)
mutable struct FooBarDFW{s}; end
fooDFW(p::Type{FooBarDFW}) = string(p.parameters[1])
fooDFW(p) = string(p.parameters[1])
@test fooDFW(FooBarDFW{:x}) == "x" # not ":x"
# Type inference for tuple parameters
struct fooTuple{s}; end
barTuple1() = fooTuple{(:y,)}()
barTuple2() = fooTuple{tuple(:y)}()
@test Base.return_types(barTuple1,Tuple{})[1] == Base.return_types(barTuple2,Tuple{})[1] == fooTuple{(:y,)}
# issue #6050
@test Core.Compiler.getfield_tfunc(Core.Compiler.fallback_lattice,
Dict{Int64,Tuple{UnitRange{Int64},UnitRange{Int64}}},
Core.Compiler.Const(:vals)) == Memory{Tuple{UnitRange{Int64},UnitRange{Int64}}}
# assert robustness of `getfield_tfunc`
struct GetfieldRobustness
field::String
end
@test Base.return_types((GetfieldRobustness,String,)) do obj, s
t = (10, s) # to form `PartialStruct`
getfield(obj, t)
end |> only === Union{}
# issue #12476
function f12476(a)
(k, v) = a
return v
end
@inferred f12476(1.0 => 1)
# issue #12551 (make sure these don't throw in inference)
Base.return_types(unsafe_load, (Ptr{nothing},))
Base.return_types(getindex, (Vector{nothing},))
# issue #12636
module MyColors
abstract type Paint{T} end
struct RGB{T<:AbstractFloat} <: Paint{T}
r::T
g::T
b::T
end
myeltype(::Type{Paint{T}}) where {T} = T
myeltype(::Type{P}) where {P<:Paint} = myeltype(supertype(P))
myeltype(::Type{Any}) = Any
end
@test @inferred(MyColors.myeltype(MyColors.RGB{Float32})) == Float32
@test @inferred(MyColors.myeltype(MyColors.RGB)) == Any
# issue #12826
f12826(v::Vector{I}) where {I<:Integer} = v[1]
@test Base.return_types(f12826,Tuple{Array{I,1} where I<:Integer})[1] == Integer
# non-terminating inference, issue #14009
# non-terminating codegen, issue #16201
mutable struct A14009{T}; end
A14009(a::T) where {T} = A14009{T}()
f14009(a) = rand(Bool) ? f14009(A14009(a)) : a
code_typed(f14009, (Int,))
code_llvm(devnull, f14009, (Int,))
mutable struct B14009{T}; end
g14009(a) = g14009(B14009{a})
code_typed(g14009, (Type{Int},))
code_llvm(devnull, f14009, (Int,))
# issue #9232
arithtype9232(::Type{T},::Type{T}) where {T<:Real} = arithtype9232(T)
result_type9232(::Type{T1}, ::Type{T2}) where {T1<:Number,T2<:Number} = arithtype9232(T1, T2)
# this gave a "type too large", but not reliably
@test length(code_typed(result_type9232, Tuple{(Type{x} where x<:Union{Float32,Float64}), Type{T2} where T2<:Number})) == 1
# issue #10878
function g10878(x; kw...); end
invoke_g10878() = invoke(g10878, Tuple{Any}, 1)
code_typed(invoke_g10878, ())
code_llvm(devnull, invoke_g10878, ())
# issue #10930
@test isa(Base.return_types(promote, (Any,Any,Vararg{Any})), Vector)
find_tvar10930(sig::Type{T}) where {T<:Tuple} = 1
function find_tvar10930(arg)
if isa(arg, Type) && arg<:Tuple
find_tvar10930(arg[random_var_name])
end
return 1
end
@test find_tvar10930(Vararg{Int}) === 1
# issue #12474
@generated function f12474(::Any)
return :(for i in 1
end)
end
let ast12474 = code_typed(f12474, Tuple{Float64})
@test isdispatchelem(ast12474[1][2])
end
# pr #15259
struct A15259
x
y
end
# check that allocation was elided
@eval f15259(x,y) = (a = $(Expr(:new, :A15259, :x, :y)); (a.x, a.y, getfield(a,1), getfield(a, 2)))
@test isempty(filter(x -> isa(x,Expr) && x.head === :(=) &&
isa(x.args[2], Expr) && x.args[2].head === :new,
code_typed(f15259, (Any,Int))[1][1].code))
@test f15259(1,2) == (1,2,1,2)
# check that error cases are still correct
@eval g15259(x,y) = (a = $(Expr(:new, :A15259, :x, :y)); a.z)
@test_throws ErrorException g15259(1,1)
@eval h15259(x,y) = (a = $(Expr(:new, :A15259, :x, :y)); getfield(a, 3))
@test_throws BoundsError h15259(1,1)
# issue #7810
mutable struct Foo7810{T<:AbstractVector}
v::T
end
bar7810() = [Foo7810([(a,b) for a in 1:2]) for b in 3:4]
@test Base.return_types(bar7810,Tuple{})[1] == Array{Foo7810{Array{Tuple{Int,Int},1}},1}
# issue #11366
f11366(x::Type{Ref{T}}) where {T} = Ref{x}
@test !isconcretetype(Base.return_types(f11366, (Any,))[1])
let f(T) = Type{T}
@test Base.return_types(f, Tuple{Type{Int}}) == Any[Type{Type{Int}}]
end
# issue #9222
function SimpleTest9222(pdedata, mu_actual::Vector{T1},
nu_actual::Vector{T1}, v0::Vector{T1}, epsilon::T1, beta::Vector{T1},
delta::T1, l::T1, R::T1, s0::T1, show_trace::Bool = true) where T1<:Real
return 0.0
end
function SimpleTest9222(pdedata, mu_actual::Vector{T1},
nu_actual::Vector{T1}, v0::Vector{T1}, epsilon::T1, beta::Vector{T1},
delta::T1, l::T1, R::T1) where T1<:Real
return SimpleTest9222(pdedata, mu_actual, nu_actual, v0, epsilon,
beta, delta, l, R, v0[1])
end
function foo9222()
v0 = rand(10)
mu_actual = rand(10)
nu_actual = rand(10)
SimpleTest9222(0.0, mu_actual, nu_actual, v0, 0.0, [1.0,1.0], 0.5, 5.0, 20.0)
end
@test 0.0 == foo9222()
# branching based on inferable conditions
let f(x) = isa(x,Int) ? 1 : ""
@test Base.return_types(f, Tuple{Int}) == [Int]
end
let g() = Int <: Real ? 1 : ""
@test Base.return_types(g, Tuple{}) == [Int]
end
const NInt{N} = Tuple{Vararg{Int, N}}
const NInt1{N} = Tuple{Int, Vararg{Int, N}}
@test Base.eltype(NInt) === Int
@test Base.eltype(NInt1) === Int
@test Base.eltype(NInt{0}) === Union{}
@test Base.eltype(NInt{1}) === Int
@test Base.eltype(NInt1{0}) === Int
@test Base.eltype(NInt1{1}) === Int
fNInt(x::NInt) = (x...,)
gNInt() = fNInt(x)
@test Base.return_types(gNInt, ()) == Any[NInt]
@test Base.return_types(eltype, (NInt,)) == Any[Union{Type{Int}, Type{Union{}}}] # issue 21763
# issue #17572
function f17572(::Type{Val{A}}) where A
return Tuple{Int}(Tuple{A}((1,)))
end
# test that inference doesn't error
@test isa(code_typed(f17572, (Type{Val{0}},)), Array)
# === with singleton constants
let f(x) = (x===nothing) ? 1 : 1.0
@test Base.return_types(f, (Nothing,)) == Any[Int]
end
# issue #16530
mutable struct Foo16530a{dim}
c::Vector{NTuple{dim, Float64}}
d::Vector
end
mutable struct Foo16530b{dim}
c::Vector{NTuple{dim, Float64}}
end
f16530a() = fieldtype(Foo16530a, :c)
f16530a(c) = fieldtype(Foo16530a, c)
f16530b() = fieldtype(Foo16530b, :c)
f16530b(c) = fieldtype(Foo16530b, c)
let T = Vector{Tuple{Vararg{Float64,dim}}} where dim
@test f16530a() == T
@test f16530a(:c) == T
@test Base.return_types(f16530a, ()) == Any[Type{T}]
@test Base.return_types(f16530b, ()) == Any[Type{T}]
@test Base.return_types(f16530b, (Symbol,)) == Any[Type{T}]
end
@test f16530a(:d) == Vector
let T1 = Tuple{Int, Float64},
T2 = Tuple{Int, Float32},
T = Tuple{T1, T2}
global f18037
f18037() = fieldtype(T, 1)
f18037(i) = fieldtype(T, i)
@test f18037() === T1
@test f18037(1) === T1
@test f18037(2) === T2
@test Base.return_types(f18037, ()) == Any[Type{T1}]
@test Base.return_types(f18037, (Int,)) == Any[Union{Type{T1},Type{T2}}]
end
# issue #18015
mutable struct Triple18015
a::Int
b::Int
c::Int
end
a18015(tri) = tri.a
b18015(tri) = tri.b
c18015(tri) = tri.c
setabc18015!(tri, a, b, c) = (tri.a = a; tri.b = b; tri.c = c)
let tri = Triple18015(1, 2, 3)
setabc18015!(tri, b18015(tri), c18015(tri), a18015(tri))
@test tri.a === 2 && tri.b === 3 && tri.c === 1
end
# issue #18222
f18222(::Union{T, Int}) where {T<:AbstractFloat} = false
f18222(x) = true
g18222(x) = f18222(x)
@test f18222(1) == g18222(1) == false
@test f18222(1.0) == g18222(1.0) == false
# issue #18399
# TODO: this test is rather brittle
mutable struct TSlow18399{T}
x::T
end
function hvcat18399(as)
cb = ri->as[ri]
g = Base.Generator(cb, 1)
return g.f(1)
end
function cat_t18399(X...)
for i = 2:1
X[i]
d->i
end
end
C18399 = TSlow18399{Int}(1)
GB18399 = TSlow18399{Int}(1)
function test18399(C)
B = GB18399::Union{TSlow18399{Int},TSlow18399{Any}}
cat_t18399()
cat_t18399(B, B, B)
hvcat18399((C,))
return hvcat18399(((2, 3),))
end
@test test18399(C18399) == (2, 3)
# issue #18450
f18450() = ifelse(true, Tuple{Vararg{Int}}, Tuple{Vararg})
@test f18450() == Tuple{Vararg{Int}}
# issue #18569
@test !Core.Compiler.isconstType(Type{Tuple})
# issue #10880
function cat10880(a, b)
Tuple{a.parameters..., b.parameters...}
end
@inferred cat10880(Tuple{Int8,Int16}, Tuple{Int32})
# issue #19348
function is_typed_expr(e::Expr)
if e.head === :call ||
e.head === :invoke ||
e.head === :new ||
e.head === :copyast ||
e.head === :inert
return true
end
return false
end
is_typed_expr(@nospecialize other) = false
test_inferred_static(@nospecialize(other)) = true
function test_inferred_static(expr::Expr)
for a in expr.args
test_inferred_static(a)
end
end
function test_inferred_static(arrow::Pair, all_ssa)
code, rt = arrow
@test isdispatchelem(rt)
@test code.inferred
for i = 1:length(code.code)
e = code.code[i]
test_inferred_static(e)
if all_ssa && is_typed_expr(e)
@test isdispatchelem(code.ssavaluetypes[i])
end
end
end
function f18679()
local a
for i = 1:2
if i == 1
a = ((),)
else
return a[1]
end
end
error()
end
g18679(x::Tuple) = ()
g18679() = g18679(any_undef_global::Union{Int, Tuple{}})
function h18679()
for i = 1:2
local a
if i == 1
a = ((),)
else
@isdefined(a) && return "BAD"
end
end
end
function g19348(x)
a, b = x
g = 1
g = 2
c = Base.indexed_iterate(x, g, g)
return a + b + c[1]
end
for (codetype, all_ssa) in Any[
(code_typed(f18679, ())[1], true),
(code_typed(g18679, ())[1], false),
(code_typed(h18679, ())[1], true),
(code_typed(g19348, (typeof((1, 2.0)),))[1], true)]
code = codetype[1]
local i
for i = 1:length(code.ssavaluetypes)
typ = code.ssavaluetypes[i]
@test isa(typ, Type) || isa(typ, Const) || isa(typ, Conditional) || typ
end
test_inferred_static(codetype, all_ssa)
end
@test f18679() === ()
@test_throws UndefVarError(:any_undef_global, @__MODULE__) g18679()
@test h18679() === nothing
# issue #5575: inference with abstract types on a reasonably complex method tree
zeros5575(::Type{T}, dims::Tuple{Vararg{Any,N}}) where {T,N} = Array{T,N}(undef, dims)
zeros5575(dims::Tuple) = zeros5575(Float64, dims)
zeros5575(::Type{T}, dims...) where {T} = zeros5575(T, dims)
zeros5575(a::AbstractArray) = zeros5575(a, Float64)
zeros5575(a::AbstractArray, ::Type{T}) where {T} = zeros5575(a, T, size(a))
zeros5575(a::AbstractArray, ::Type{T}, dims::Tuple) where {T} = zeros5575(T, dims)
zeros5575(a::AbstractArray, ::Type{T}, dims...) where {T} = zeros5575(T, dims)
zeros5575(dims...) = zeros5575(dims)
f5575() = zeros5575(Type[Float64][1], 1)
@test Base.return_types(f5575, ())[1] == Vector
g5575() = zeros(Type[Float64][1], 1)
@test Base.return_types(g5575, ())[1] == Vector
# make sure Tuple{unknown} handles the possibility that `unknown` is a Vararg
function maybe_vararg_tuple_1()
x = Any[Vararg{Int}][1]
Tuple{x}
end
@test Type{Tuple{Vararg{Int}}} <: Base.return_types(maybe_vararg_tuple_1, ())[1]
function maybe_vararg_tuple_2()
x = [Vararg{Int}][1]
Tuple{x}
end
@test Type{Tuple{Vararg{Int}}} <: Base.return_types(maybe_vararg_tuple_2, ())[1]
# inference of `fieldtype`
mutable struct UndefField__
x::Union{}
UndefField__() = new()
end
f_infer_undef_field() = fieldtype(UndefField__, :x)
@test Base.return_types(f_infer_undef_field, ()) == Any[Type{Union{}}]
@test f_infer_undef_field() === Union{}
mutable struct HasAbstractlyTypedField
x::Union{Int,String}
end
f_infer_abstract_fieldtype() = fieldtype(HasAbstractlyTypedField, :x)
@test Base.return_types(f_infer_abstract_fieldtype, ()) == Any[Type{Union{Int,String}}]
let fieldtype_tfunc(@nospecialize args...) =
Core.Compiler.fieldtype_tfunc(Core.Compiler.fallback_lattice, args...),
fieldtype_nothrow(@nospecialize(s0), @nospecialize(name)) = Core.Compiler.fieldtype_nothrow(
Core.Compiler.SimpleInferenceLattice.instance, s0, name)
@test fieldtype_tfunc(Union{}, :x) == Union{}
@test fieldtype_tfunc(Union{Type{Int32}, Int32}, Const(:x)) == Union{}
@test fieldtype_tfunc(Union{Type{Base.RefValue{T}}, Type{Int32}} where {T<:Array}, Const(:x)) == Type{<:Array}
@test fieldtype_tfunc(Union{Type{Base.RefValue{T}}, Type{Int32}} where {T<:Real}, Const(:x)) == Type{<:Real}
@test fieldtype_tfunc(Union{Type{Base.RefValue{<:Array}}, Type{Int32}}, Const(:x)) == Type{Array}
@test fieldtype_tfunc(Union{Type{Base.RefValue{<:Real}}, Type{Int32}}, Const(:x)) == Const(Real)
@test fieldtype_tfunc(Const(Union{Base.RefValue{<:Real}, Type{Int32}}), Const(:x)) == Const(Real)
@test fieldtype_tfunc(Type{Union{Base.RefValue{T}, Type{Int32}}} where {T<:Real}, Const(:x)) == Type{<:Real}
@test fieldtype_tfunc(Type{<:Tuple}, Const(1)) == Any
@test fieldtype_tfunc(Type{<:Tuple}, Any) == Any
@test fieldtype_nothrow(Type{Base.RefValue{<:Real}}, Const(:x))
@test !fieldtype_nothrow(Type{Union{}}, Const(:x))
@test !fieldtype_nothrow(Union{Type{Base.RefValue{T}}, Int32} where {T<:Real}, Const(:x))
@test !fieldtype_nothrow(Union{Type{Base.RefValue{<:Real}}, Int32}, Const(:x))
@test fieldtype_nothrow(Const(Union{Base.RefValue{<:Real}, Int32}), Const(:x))
@test !fieldtype_nothrow(Type{Union{Base.RefValue{T}, Int32}} where {T<:Real}, Const(:x)) # improvable?
@test fieldtype_nothrow(Union{Type{Base.RefValue{T}}, Type{Base.RefValue{Any}}} where {T<:Real}, Const(:x))
@test fieldtype_nothrow(Union{Type{Base.RefValue{<:Real}}, Type{Base.RefValue{Any}}}, Const(:x))
@test fieldtype_nothrow(Const(Union{Base.RefValue{<:Real}, Base.RefValue{Any}}), Const(:x))
@test fieldtype_nothrow(Type{Union{Base.RefValue{T}, Base.RefValue{Any}}} where {T<:Real}, Const(:x))
@test !fieldtype_nothrow(Type{Tuple{}}, Const(1))
@test fieldtype_nothrow(Type{Tuple{Int}}, Const(1))
@test fieldtype_nothrow(Type{Tuple{Vararg{Int}}}, Const(1))
@test fieldtype_nothrow(Type{Tuple{Vararg{Int}}}, Const(2))
@test fieldtype_nothrow(Type{Tuple{Vararg{Int}}}, Const(42))
@test !fieldtype_nothrow(Type{<:Tuple{Vararg{Int}}}, Const(1))
@test TypeVar <: fieldtype_tfunc(Any, Any)
end
# issue #11480
@noinline f11480(x,y) = x
let A = Ref
function h11480(x::A{A{A{A{A{A{A{A{A{Int}}}}}}}}}) # enough for type_too_complex
y :: Tuple{Vararg{typeof(x)}} = (x,) # apply_type(Vararg, too_complex) => TypeVar(_,Vararg)
f(y[1], # fool getfield logic : Tuple{_<:Vararg}[1] => Vararg
1) # make it crash by construction of the signature Tuple{Vararg,Int}
end
@test !Base.isvarargtype(Base.return_types(h11480, (Any,))[1])
end
# Issue 19641
foo19641() = let a = 1.0
Core.Compiler.return_type(x -> x + a, Tuple{Float64})
end
@inferred foo19641()
test_fast_eq(a, b) = @fastmath a == b
test_fast_ne(a, b) = @fastmath a != b
test_fast_lt(a, b) = @fastmath a < b
test_fast_le(a, b) = @fastmath a <= b
@inferred test_fast_eq(1f0, 1f0)
@inferred test_fast_ne(1f0, 1f0)
@inferred test_fast_lt(1f0, 1f0)
@inferred test_fast_le(1f0, 1f0)
@inferred test_fast_eq(1.0, 1.0)
@inferred test_fast_ne(1.0, 1.0)
@inferred test_fast_lt(1.0, 1.0)
@inferred test_fast_le(1.0, 1.0)
abstract type AbstractMyType18457{T,F,G} end
struct MyType18457{T,F,G}<:AbstractMyType18457{T,F,G} end
tpara18457(::Type{AbstractMyType18457{I}}) where {I} = I
tpara18457(::Type{A}) where {A<:AbstractMyType18457} = tpara18457(supertype(A))
@test tpara18457(MyType18457{true}) === true
@testset "type inference error #19322" begin
Y_19322 = reshape(round.(Int, abs.(randn(5*1000))) .+ 1, 1000, 5)
function FOO_19322(Y::AbstractMatrix; frac::Float64=0.3, nbins::Int=100, n_sims::Int=100)
num_iters, num_chains = size(Y)
start_iters = unique([1; map(s->round(Int64, exp10(s)), range(log(10,100),
stop=log(10,num_iters/2),
length=nbins-1))])
result = zeros(Float64, 10, length(start_iters) * num_chains)
j=1
for c in 1:num_chains
for st in 1:length(start_iters)
n = length(start_iters[st]:num_iters)
idx1 = start_iters[st]:round(Int64, start_iters[st] + frac * n - 1)
idx2 = round(Int64, num_iters - frac * n + 1):num_iters
y1 = Y[idx1,c]
y2 = Y[idx2,c]
n_min = min(length(y1), length(y2))
X = [y1[1:n_min] y2[(end - n_min + 1):end]]
end
end
end
@test_nowarn FOO_19322(Y_19322)
end
randT_inferred_union() = rand(Bool) ? rand(Bool) ? 1 : 2.0 : nothing
function f_inferred_union()
b = randT_inferred_union()
if !(nothing !== b) === true
return f_inferred_union_nothing(b)
elseif (isa(b, Float64) === true) !== false
return f_inferred_union_float(b)
else
return f_inferred_union_int(b)
end
end
f_inferred_union_nothing(::Nothing) = 1
f_inferred_union_nothing(::Any) = "broken"
f_inferred_union_float(::Float64) = 2
f_inferred_union_float(::Any) = "broken"
f_inferred_union_int(::Int) = 3
f_inferred_union_int(::Any) = "broken"
@test @inferred(f_inferred_union()) in (1, 2, 3)
# issue #11015
mutable struct AT11015
f::Union{Bool,Function}
end
g11015(::Type{S}, ::S) where {S} = 1
f11015(a::AT11015) = g11015(Base.fieldtype(typeof(a), :f), true)
g11015(::Type{Bool}, ::Bool) = 2.0
@test Base.return_types(f11015, (AT11015,)) == Any[Int]
@test f11015(AT11015(true)) === 1
# better inference of apply (#20343)
f20343(::String, ::Int) = 1
f20343(::Int, ::String, ::Int, ::Int) = 2
f20343(::Int, ::Int, ::String, ::Int, ::Int, ::Int) = 3
f20343(::Int, ::Int, ::Int, ::String, ::Int, ::Int, ::Int, ::Int, ::Int, ::Int, ::Int, ::Int) = 4
f20343(::Union{Int,String}...) = Int8(5)
f20343(::Any...) = "no"
function g20343()
n = rand(1:3)
T = Union{Tuple{String, Int}, Tuple{Int, String, Int, Int}, Tuple{Int, Int, String, Int, Int, Int}}
i = ntuple(i -> n == i ? "" : 0, 2n)::T
f20343(i...)
end
@test Base.return_types(g20343, ()) == [Int]
function h20343()
n = rand(1:3)
T = Union{Tuple{String, Int, Int}, Tuple{Int, String, Int}, Tuple{Int, Int, String}}
i = ntuple(i -> n == i ? "" : 0, 3)::T
f20343(i..., i..., i..., i...)
end
@test Base.return_types(h20343, ()) == [Union{Int8, Int}]
function i20343()
f20343([1,2,3]..., 4)
end
@test Base.return_types(i20343, ()) == [Int8]
struct Foo20518 <: AbstractVector{Int}; end # issue #20518; inference assumed AbstractArrays
Base.getindex(::Foo20518, ::Int) = "oops" # not to lie about their element type
Base.axes(::Foo20518) = (Base.OneTo(4),)
foo20518(xs::Any...) = -1
foo20518(xs::Int...) = [0]
bar20518(xs) = sum(foo20518(xs...))
@test bar20518(Foo20518()) == -1
f19957(::Int) = Int8(1) # issue #19957, inference failure when splatting a number
f19957(::Int...) = Int16(1)
f19957(::Any...) = "no"
g19957(x) = f19957(x...)
@test Base.return_types(g19957, (Int,)) == Any[Int8]
# Inference for some type-level computation
fUnionAll(::Type{T}) where {T} = Type{S} where S <: T
@inferred fUnionAll(Real) == Type{T} where T <: Real
@inferred fUnionAll(Rational{T} where T <: AbstractFloat) == Type{T} where T<:(Rational{S} where S <: AbstractFloat)
# issue #20733
# run this test in a separate process to avoid interfering with `getindex`
let def = "Base.getindex(t::NTuple{3,NTuple{2,Int}}, i::Int, j::Int, k::Int) = (t[1][i], t[2][j], t[3][k])"
@test read(`$(Base.julia_cmd()) --startup-file=no -E "$def;test(t) = t[2,1,2];test(((3,4), (5,6), (7,8)))"`, String) ==
"(4, 5, 8)\n"
end
# issue #20267
mutable struct T20267{T}
inds::Vector{T}
end
# infinite type growth via lower bounds (formed by intersection)
f20267(x::T20267{T}, y::T) where (T) = f20267(Any[1][1], x.inds)
@test Base.return_types(f20267, (Any, Any)) == Any[Union{}]
#issue #21065, elision of _apply_iterate when splatted expression is not effect_free
function f21065(x,y)
println("x=$x, y=$y")
return x, y
end
g21065(x,y) = +(f21065(x,y)...)
function test_no_apply(expr::Expr)
return all(test_no_apply, expr.args)
end
function test_no_apply(ref::GlobalRef)
return ref.mod != Core || ref.name !== :_apply_iterate
end
test_no_apply(::Any) = true
@test all(test_no_apply, code_typed(g21065, Tuple{Int,Int})[1].first.code)
# issue #20033
# check return_type_tfunc for calls where no method matches
bcast_eltype_20033(f, A) = Core.Compiler.return_type(f, Tuple{eltype(A)})
err20033(x::Float64...) = prod(x)
@test bcast_eltype_20033(err20033, [1]) === Union{}
@test Base.return_types(bcast_eltype_20033, (typeof(err20033), Vector{Int},)) == Any[Type{Union{}}]
# return_type on builtins
@test Core.Compiler.return_type(tuple, Tuple{Int,Int8,Int}) === Tuple{Int,Int8,Int}
# issue #21088
@test Core.Compiler.return_type(typeof, Tuple{Int}) == Type{Int}
# Inference of constant svecs
@eval fsvecinf() = $(QuoteNode(Core.svec(Tuple{Int,Int}, Int)))[1]
@test only(Base.return_types(fsvecinf, Tuple{})) == Type{Tuple{Int,Int}}
# nfields tfunc on `DataType`
let f = ()->Val{nfields(DataType[Int][1])}
@test f() == Val{length(DataType.types)}
end
# inference on invalid getfield call
@eval _getfield_with_string_() = getfield($(1=>2), "")