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inference: add missing MustAlias widening in _getfield_tfunc #54996

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Jul 2, 2024
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inference: add missing MustAlias widening in _getfield_tfunc #54996

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2 changes: 1 addition & 1 deletion base/compiler/tfuncs.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -1098,7 +1098,7 @@ end
end

@nospecs function _getfield_tfunc(𝕃::AnyMustAliasesLattice, s00, name, setfield::Bool)
return _getfield_tfunc(widenlattice(𝕃), widenmustalias(s00), name, setfield)
return _getfield_tfunc(widenlattice(𝕃), widenmustalias(s00), widenmustalias(name), setfield)
end

@nospecs function _getfield_tfunc(𝕃::PartialsLattice, s00, name, setfield::Bool)
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8 changes: 8 additions & 0 deletions test/compiler/inference.jl
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Expand Up @@ -2565,6 +2565,14 @@ Base.return_types(intermustalias_edgecase, (Any,); interp=MustAliasInterpreter()
intermustalias_edgecase(x)
end |> only === Core.Compiler.InterMustAlias

@test Base.infer_return_type((AliasableField,Integer,); interp=MustAliasInterpreter()) do a, x
s = (;x)
if getfield(a, :f) isa Symbol
return getfield(s, getfield(a, :f))
end
return 0
end == Integer

function f25579(g)
h = g[]
t = (h === nothing)
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