fn intern_shallow<'rt, 'mir, 'tcx, M: CompileTimeMachine<'mir, 'tcx, MemoryKind>>( ecx: &'rt mut InterpCx<'mir, 'tcx, M>, leftover_allocations: &'rt mut FxIndexSet<AllocId>, alloc_id: AllocId, mode: InternMode, ty: Option<Ty<'tcx>> ) -> Option<IsStaticOrFn>
Intern an allocation without looking at its children.
mode is the mode of the environment where we found this pointer.
mutability is the mutability of the place to be interned; even if that says
immutable things might become mutable if
ty is not frozen.
ty can be
None if there is no potential interior mutability
to account for (e.g. for vtables).