regression in methods lookup

[vtjnash]

julia> methods(Base.Broadcast.broadcasted, Tuple{Base.Broadcast.BroadcastStyle, Any, Vararg})
# 1 method for generic function "broadcasted" from Base.Broadcast:
 [1] broadcasted(::S, f, args...) where S<:Base.Broadcast.BroadcastStyle
     @ broadcast.jl:1337

(there should be about 48 of these, for various subtypes of Base.Broadcast.BroadcastStyle)

[maleadt]

eb4b1a78388c4a2d2c93dac303c61bdb98052dbe is the first bad commit
commit eb4b1a78388c4a2d2c93dac303c61bdb98052dbe
Author: Jameson Nash <vtjnash@gmail.com>
Date:   Tue Mar 7 21:21:00 2023 -0500

    typemap: improve quality of leaf split (#48925)

    Introduce another optional layer of indirection, doing lookup on first
    typename always, then leaftypes. This lets the intersection-iterators
    skip a lot of jl_isa queries later.

ref #48925