inference: fix typeof-tfunc impl (#31405)

(cherry picked from commit 604c9b2)

Author: vtjnash

base/compiler/tfuncs.jl

@@ -392,7 +392,7 @@ function typeof_tfunc(@nospecialize(t))
         a = widenconst(typeof_tfunc(t.a))
         b = widenconst(typeof_tfunc(t.b))
         return Union{a, b}
-    elseif isa(t, TypeVar) && !(Any <: t.ub)
+    elseif isa(t, TypeVar) && !(Any === t.ub)
         return typeof_tfunc(t.ub)
     elseif isa(t, UnionAll)
         return rewrap_unionall(widenconst(typeof_tfunc(unwrap_unionall(t))), t)

test/compiler/compiler.jl

@@ -1339,6 +1339,26 @@ let egal_tfunc
     @test egal_tfunc(Union{Int64, Float64}, AbstractArray) === Const(false)
 end
 
+using Core.Compiler: PartialStruct, nfields_tfunc, sizeof_tfunc, sizeof_nothrow
+let PT = PartialStruct(Tuple{Int64,UInt64}, Any[Const(10, false), UInt64])
+    @test sizeof_tfunc(PT) === Const(16, false)
+    @test nfields_tfunc(PT) === Const(2, false)
+    @test sizeof_nothrow(PT) === true
+end
+@test sizeof_nothrow(Const(Tuple)) === false
+
+using Core.Compiler: typeof_tfunc
+@test typeof_tfunc(Tuple{Vararg{Int}}) == Type{Tuple{Vararg{Int,N}}} where N
+@test typeof_tfunc(Tuple{Any}) == Type{<:Tuple{Any}}
+@test typeof_tfunc(Type{Array}) === DataType
+@test typeof_tfunc(Type{<:Array}) === DataType
+@test typeof_tfunc(Array{Int}) == Type{Array{Int,N}} where N
+@test typeof_tfunc(AbstractArray{Int}) == Type{<:AbstractArray{Int,N}} where N
+@test typeof_tfunc(Union{<:T, <:Real} where T<:Complex) == Union{Type{Complex{T}} where T<:Real, Type{<:Real}}
+
+f_typeof_tfunc(x) = typeof(x)
+@test Base.return_types(f_typeof_tfunc, (Union{<:T, Int} where T<:Complex,)) == Any[Union{Type{Int}, Type{Complex{T}} where T<:Real}]
+
 function f23024(::Type{T}, ::Int) where T
     1 + 1
 end