Revision a121721f975fc4105ed24ebd0ad1020d08d07a38 authored by Shuhei Kadowaki on 01 November 2021, 10:49:07 UTC, committed by GitHub on 01 November 2021, 10:49:07 UTC
* inference: form `PartialStruct` for extra type information propagation This commit forms `PartialStruct` whenever there is any type-level refinement available about a field, even if it's not "constant" information. In Julia "definitions" are allowed to be abstract whereas "usages" (i.e. callsites) are often concrete. The basic idea is to allow inference to make more use of such precise callsite type information by encoding it as `PartialStruct`. This may increase optimization possibilities of "unidiomatic" Julia code, which may contain poorly-typed definitions, like this very contrived example: ```julia struct Problem n; s; c; t end function main(args...) prob = Problem(args...) s = 0 for i in 1:prob.n m = mod(i, 3) s += m == 0 ? sin(prob.s) : m == 1 ? cos(prob.c) : tan(prob.t) end return prob, s end main(10000, 1, 2, 3) ``` One of the obvious limitation is that this extra type information can be propagated inter-procedurally only as a const-propagation. I'm not sure this kind of "just a type-level" refinement can often make constant-prop' successful (i.e. shape-up a method body and allow it to be inlined, encoding the extra type information into the generated code), thus I didn't not modify any part of const-prop' heuristics. So the improvements from this change might not be very useful for general inter-procedural analysis currently, but they should definitely improve the accuracy of local analysis and very simple inter-procedural analysis.
1 parent 6c274ed
ttyhascolor.jl
# This file is a part of Julia. License is MIT: https://julialang.org/license
if Sys.iswindows()
ttyhascolor(term_type = nothing) = true
else
function ttyhascolor(term_type = get(ENV, "TERM", ""))
startswith(term_type, "xterm") && return true
try
@static if Sys.KERNEL === :FreeBSD
return success(`tput AF 0`)
else
return success(`tput setaf 0`)
end
catch e
return false
end
end
end
function get_have_color()
global have_color
have_color === nothing && (have_color = ttyhascolor())
return have_color::Bool
end
in(key_value::Pair{Symbol,Bool}, ::TTY) = key_value.first === :color && key_value.second === get_have_color()
haskey(::TTY, key::Symbol) = key === :color
getindex(::TTY, key::Symbol) = key === :color ? get_have_color() : throw(KeyError(key))
get(::TTY, key::Symbol, default) = key === :color ? get_have_color() : default
![swh spinner](/static/img/swh-spinner.gif)
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