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mangling: non-monomorphic #[rustc_symbol_name]

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This commit adjust `#[rustc_symbol_name]` so that it can be applied to
non-monomorphic functions without producing an ICE.

Signed-off-by: David Wood <david@davidtw.co>
This commit is contained in:
David Wood 2020-08-18 18:40:03 +01:00
parent 5565241f65
commit 9752787dca
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4 changed files with 19 additions and 21 deletions
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12
compiler/rustc_middle/src/ty/instance.rs
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@ -291,7 +291,17 @@ impl<'tcx> Instance<'tcx> {
}
pub fn mono(tcx: TyCtxt<'tcx>, def_id: DefId) -> Instance<'tcx> {
Instance::new(def_id, tcx.empty_substs_for_def_id(def_id))
let substs = InternalSubsts::for_item(tcx, def_id, |param, _| match param.kind {
ty::GenericParamDefKind::Lifetime => tcx.lifetimes.re_erased.into(),
ty::GenericParamDefKind::Type { .. } => {
bug!("Instance::mono: {:?} has type parameters", def_id)
}
ty::GenericParamDefKind::Const { .. } => {
bug!("Instance::mono: {:?} has const parameters", def_id)
}
});
Instance::new(def_id, substs)
}
#[inline]