improve DiscriminantKind handling#74276
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bors merged 1 commit intorust-lang:masterfrom Jul 16, 2020
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Adds a lang item
discriminant_typefor the associated typeDiscriminantKind::Discriminant.Changes the discriminant of generators from
i32tou32, which should not be observable to fix anoversight where MIR was using
u32and codegen and typeck usedi32.