I have a quite complicated parametric type that contains a simple Int64 field like: struct A{T, U, V, W, X, Y} n::Int64 ... (a lot of other possibly parametric-typed fields) end a = A(3, .....) when I try to do @code_warntype a.n, I got a warntype like: Body::Any 1 ─ %1 = Base.getfield(x…

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No, it is just because @code_warntype does not do constant propagation for your input.

You’ll see that if you wrap the access in a function (which it would be as long as you’re not operating at global scope), then the :x is correctly constant-propagated and everything is fine: julia> struct Foo x::Int y::String end julia> function get_x(f) f.x …

I want to include a MWE… but the case is just too complicated (needs a lot of custom types)… I could not reproduce the case in a simpler example… In essence, the situation is like: struct A npar::Int64 end const a = A(3) function f(x::A) npar = x.npar function g() y = 0 for i in 1:npar …

Probably performance of captured variables in closures · Issue #15276 · JuliaLang/julia · GitHub

Base.getfield() gives warntype?

New to Julia

Tamas_Papp December 4, 2019, 11:22am 2

Please include a self-contained MWE.

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Base.getfield() gives warntype?

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