Index: lib/Transforms/IPO/Internalize.cpp
===================================================================
--- lib/Transforms/IPO/Internalize.cpp
+++ lib/Transforms/IPO/Internalize.cpp
@@ -119,10 +119,6 @@
     if (ExternalComdats.count(C))
       return false;
 
-    // If a comdat is not externally visible we can drop it.
-    if (auto GO = dyn_cast<GlobalObject>(&GV))
-      GO->setComdat(nullptr);
-
     if (GV.hasLocalLinkage())
       return false;
   } else {
Index: test/Transforms/Internalize/comdat.ll
===================================================================
--- test/Transforms/Internalize/comdat.ll
+++ test/Transforms/Internalize/comdat.ll
@@ -8,7 +8,7 @@
 ; CHECK: @c1_c = global i32 0, comdat($c1)
 @c1_c = global i32 0, comdat($c1)
 
-; CHECK: @c2_b = internal global i32 0{{$}}
+; CHECK: @c2_b = internal global i32 0, comdat($c2)
 @c2_b = global i32 0, comdat($c2)
 
 ; CHECK: @c3 = global i32 0, comdat{{$}}
@@ -36,12 +36,12 @@
   ret void
 }
 
-; CHECK: define internal void @c2() {
+; CHECK: define internal void @c2() comdat {
 define internal void @c2() comdat {
   ret void
 }
 
-; CHECK: define internal void @c2_a() {
+; CHECK: define internal void @c2_a() comdat($c2) {
 define void @c2_a() comdat($c2) {
   ret void
 }