Index: lib/Object/IRSymtab.cpp
===================================================================
--- lib/Object/IRSymtab.cpp
+++ lib/Object/IRSymtab.cpp
@@ -188,11 +188,7 @@
     Uncommon().CommonAlign = GV->getAlignment();
   }
 
-  const GlobalObject *Base = GV->getBaseObject();
-  if (!Base)
-    return make_error<StringError>("Unable to determine comdat of alias!",
-                                   inconvertibleErrorCode());
-  if (const Comdat *C = Base->getComdat()) {
+  if (const Comdat *C = GV->getComdat()) {
     auto P = ComdatMap.insert(std::make_pair(C, Comdats.size()));
     Sym.ComdatIndex = P.first->second;
 
Index: test/LTO/Resolution/X86/ifunc.ll
===================================================================
--- /dev/null
+++ test/LTO/Resolution/X86/ifunc.ll
@@ -0,0 +1,15 @@
+; RUN: opt -module-summary -o %t.bc %s
+; RUN: llvm-lto2 run %t.bc -r %t.bc,foo,pl -o %t2
+; RUN: llvm-nm %t2.0 | FileCheck %s
+; CHECK: T foo
+; CHECK: t foo_ifunc
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+@foo = ifunc i32 (i32), i64 ()* @foo_ifunc
+
+define internal i64 @foo_ifunc() {
+entry:
+  ret i64 0
+}