compiler/rustc_codegen_cranelift/src/linkage.rs

   1 use rustc_middle::mir::mono::{Linkage as RLinkage, MonoItem, Visibility};
   2
   3 use crate::prelude::*;
   4
   5 pub(crate) fn get_clif_linkage(
   6     mono_item: MonoItem<'_>,
   7     linkage: RLinkage,
   8     visibility: Visibility,
   9 ) -> Linkage {
  10     match (linkage, visibility) {
  11         (RLinkage::External, Visibility::Default) => Linkage::Export,
  12         (RLinkage::Internal, Visibility::Default) => Linkage::Local,
  13         (RLinkage::External, Visibility::Hidden) => Linkage::Hidden,
  14         _ => panic!("{:?} = {:?} {:?}", mono_item, linkage, visibility),
  15     }
  16 }
  17
  18 pub(crate) fn get_static_linkage(tcx: TyCtxt<'_>, def_id: DefId) -> Linkage {
  19     let fn_attrs = tcx.codegen_fn_attrs(def_id);
  20
  21     if let Some(linkage) = fn_attrs.linkage {
  22         match linkage {
  23             RLinkage::External => Linkage::Export,
  24             RLinkage::Internal => Linkage::Local,
  25             RLinkage::ExternalWeak | RLinkage::WeakAny => Linkage::Preemptible,
  26             _ => panic!("{:?}", linkage),
  27         }
  28     } else if tcx.is_reachable_non_generic(def_id) {
  29         Linkage::Export
  30     } else {
  31         Linkage::Hidden
  32     }
  33 }