Mangle personality symbol

compiler/rustc_codegen_llvm/src/context.rs

@@ -862,7 +862,17 @@ impl<'ll, 'tcx> MiscCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
                 DUMMY_SP,
             )),
             _ => {
-                let name = name.unwrap_or("rust_eh_personality");
+                let mangled_symbol;
+                let name = match name {
+                    Some(name) => name,
+                    None => {
+                        mangled_symbol = rustc_symbol_mangling::mangle_internal_symbol(
+                            tcx,
+                            "rust_eh_personality",
+                        );
+                        mangled_symbol.as_str()
+                    }
+                };
                 if let Some(llfn) = self.get_declared_value(name) {
                     llfn
                 } else {

compiler/rustc_codegen_ssa/src/back/symbol_export.rs

@@ -5,6 +5,7 @@ use rustc_ast::expand::allocator::{
     ALLOC_ERROR_HANDLER, ALLOCATOR_METHODS, NO_ALLOC_SHIM_IS_UNSTABLE, global_fn_name,
 };
 use rustc_data_structures::unord::UnordMap;
+use rustc_hir::LangItem;
 use rustc_hir::def::DefKind;
 use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, LOCAL_CRATE, LocalDefId};
 use rustc_middle::bug;
@@ -105,8 +106,7 @@ fn reachable_non_generics_provider(tcx: TyCtxt<'_>, _: LocalCrate) -> DefIdMap<S
         })
         .map(|def_id| {
             // We won't link right if this symbol is stripped during LTO.
-            let name = tcx.symbol_name(Instance::mono(tcx, def_id.to_def_id())).name;
-            let used = name == "rust_eh_personality";
+            let used = tcx.is_lang_item(def_id.to_def_id(), LangItem::EhPersonality);
 
             let export_level = if special_runtime_crate {
                 SymbolExportLevel::Rust

compiler/rustc_symbol_mangling/src/v0.rs

@@ -83,8 +83,6 @@ pub(super) fn mangle<'tcx>(
 
 pub fn mangle_internal_symbol<'tcx>(tcx: TyCtxt<'tcx>, item_name: &str) -> String {
     match item_name {
-        // rust_eh_personality must not be renamed as LLVM hard-codes the name
-        "rust_eh_personality" => return item_name.to_owned(),
         // Apple availability symbols need to not be mangled to be usable by
         // C/Objective-C code.
         "__isPlatformVersionAtLeast" | "__isOSVersionAtLeast" => return item_name.to_owned(),