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inference: fix return_type_tfunc modeling of concrete functions #51042

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Merged
merged 2 commits into from
Aug 27, 2023
Merged

inference: fix return_type_tfunc modeling of concrete functions #51042

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inference: fix return_type_tfunc modeling of concrete functions
vtjnash Aug 24, 2023
0242e42
Update base/compiler/tfuncs.jl
vtjnash Aug 26, 2023
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13 changes: 7 additions & 6 deletions base/compiler/tfuncs.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -2638,13 +2638,15 @@ function return_type_tfunc(interp::AbstractInterpreter, argtypes::Vector{Any}, s

if length(argtypes) == 3
aft = widenslotwrapper(argtypes[2])
if !isa(aft, Const) && !(isType(aft) && !has_free_typevars(aft)) &&
!(isconcretetype(aft) && !(aft <: Builtin))
return UNKNOWN
end
argtypes_vec = Any[aft, af_argtype.parameters...]
else
argtypes_vec = Any[af_argtype.parameters...]
isempty(argtypes_vec) && push!(argtypes_vec, Union{})
aft = argtypes_vec[1]
end
if !(isa(aft, Const) || (isType(aft) && !has_free_typevars(aft)) ||
(isconcretetype(aft) && !(Builtin <: aft) && !iskindtype(aft)))
return UNKNOWN
end

if contains_is(argtypes_vec, Union{})
Expand Down Expand Up @@ -2677,8 +2679,7 @@ function return_type_tfunc(interp::AbstractInterpreter, argtypes::Vector{Any}, s
# in two ways: both as being a subtype of this, and
# because of LimitedAccuracy causes
return CallMeta(Type{<:rt}, EFFECTS_TOTAL, info)
elseif (isa(tt, Const) || isconstType(tt)) &&
(isa(aft, Const) || isconstType(aft))
elseif isa(tt, Const) || isconstType(tt)
# input arguments were known for certain
# XXX: this doesn't imply we know anything about rt
return CallMeta(Const(rt), EFFECTS_TOTAL, info)
Expand Down