Index: llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
===================================================================
--- llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
+++ llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
@@ -215,9 +215,13 @@
   SetVector<FunctionSummary::ConstVCall> TypeTestAssumeConstVCalls,
       TypeCheckedLoadConstVCalls;
   ICallPromotionAnalysis ICallAnalysis;
+  SmallPtrSet<const User *, 8> Visited;
+
+  // Add personality function, prefix data and prologue data to function's ref
+  // list.
+  findRefEdges(Index, &F, RefEdges, Visited);
 
   bool HasInlineAsmMaybeReferencingInternal = false;
-  SmallPtrSet<const User *, 8> Visited;
   for (const BasicBlock &BB : F)
     for (const Instruction &I : BB) {
       if (isa<DbgInfoIntrinsic>(I))
@@ -456,12 +460,6 @@
                            CantBePromoted);
   }
 
-  // Set live flag for all personality functions. That allows to
-  // preserve them during DCE.
-  for (const llvm::Function &F : M)
-    if (!F.isDeclaration() && F.hasPersonalityFn())
-      setLiveRoot(Index, F.getPersonalityFn()->getName());
-
   // Compute summaries for all variables defined in module, and save in the
   // index.
   for (const GlobalVariable &G : M.globals()) {
Index: llvm/test/ThinLTO/X86/Inputs/personality.ll
===================================================================
--- llvm/test/ThinLTO/X86/Inputs/personality.ll
+++ llvm/test/ThinLTO/X86/Inputs/personality.ll
@@ -8,3 +8,11 @@
 define protected i32 @personality_routine(i32, i32, i64, i8*, i8*) {
   ret i32 0
 }
+
+define protected i32 @personality_routine2(i32, i32, i64, i8*, i8*) {
+  ret i32 0
+}
+
+define protected i32 @personality_routine3(i32, i32, i64, i8*, i8*) {
+  ret i32 0
+}
Index: llvm/test/ThinLTO/X86/personality.ll
===================================================================
--- llvm/test/ThinLTO/X86/personality.ll
+++ llvm/test/ThinLTO/X86/personality.ll
@@ -4,8 +4,14 @@
 ; RUN: llvm-lto2 run -o %t.o %t1.bc %t2.bc -save-temps \
 ; RUN:   -r %t2.bc,bar,p \
 ; RUN:   -r %t2.bc,personality_routine,p \
+; RUN:   -r %t2.bc,personality_routine2,p \
+; RUN:   -r %t2.bc,personality_routine3,p \
 ; RUN:   -r %t1.bc,foo,p \
+; RUN:   -r %t1.bc,foo2,p \
+; RUN:   -r %t1.bc,foo3,p \
 ; RUN:   -r %t1.bc,personality_routine,l \
+; RUN:   -r %t1.bc,personality_routine2,l \
+; RUN:   -r %t1.bc,personality_routine3,l \
 ; RUN:   -r %t1.bc,main,xp \
 ; RUN:   -r %t1.bc,bar,l
 ; RUN: llvm-readobj -t %t.o.1 | FileCheck %s --check-prefix=BINDING
@@ -22,18 +28,51 @@
 ; BINDING-NEXT:  Section: .text
 ; BINDING-NEXT: }
 
+; BINDING-NEXT: Symbol {
+; BINDING-NEXT:  Name: personality_routine2
+; BINDING-NEXT:  Value:
+; BINDING-NEXT:  Size:
+; BINDING-NEXT:  Binding: Global
+; BINDING-NEXT:  Type: Function
+; BINDING-NEXT:  Other [
+; BINDING-NEXT:    STV_PROTECTED
+; BINDING-NEXT:  ]
+; BINDING-NEXT:  Section: .text
+; BINDING-NEXT: }
+
+; BINDING-NOT:  Name: personality_routine3
+
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-pc-linux-gnu"
 
 declare protected i32 @personality_routine(i32, i32, i64, i8*, i8*)
+declare protected i32 @personality_routine2(i32, i32, i64, i8*, i8*)
+declare protected i32 @personality_routine3(i32, i32, i64, i8*, i8*)
 declare void @bar()
 
 define void @foo() personality i32 (i32, i32, i64, i8*, i8*)* @personality_routine {
   ret void
 }
 
+define internal void @foo2b() personality i8* bitcast (i32 (i32, i32, i64, i8*, i8*)* @personality_routine2 to i8*) {
+  ret void
+}
+
+define internal void @foo2a() prologue void ()* @foo2b {
+  ret void
+}
+
+define void @foo2() prefix void ()* @foo2a {
+  ret void
+}
+
+define void @foo3() personality i8* bitcast (i32 (i32, i32, i64, i8*, i8*)* @personality_routine3 to i8*) {
+  ret void
+}
+
 define i32 @main() {
   call void @foo()
+  call void @foo2()
   call void @bar()
   ret i32 0
 }