diff --git a/llvm/test/tools/gold/X86/Inputs/devirt_vcall_vis_shared_def.ll b/llvm/test/tools/gold/X86/Inputs/devirt_vcall_vis_shared_def.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/gold/X86/Inputs/devirt_vcall_vis_shared_def.ll
@@ -0,0 +1,19 @@
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-grtev4-linux-gnu"
+
+%struct.A = type { i32 (...)** }
+
+@_ZTV1A = unnamed_addr constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.A*, i32)* @_ZN1A1fEi to i8*), i8* bitcast (i32 (%struct.A*, i32)* @_ZN1A1nEi to i8*)] }, !type !0, !vcall_visibility !1
+
+define i32 @_ZN1A1fEi(%struct.A* %this, i32 %a) #0 {
+   ret i32 0;
+}
+
+define i32 @_ZN1A1nEi(%struct.A* %this, i32 %a) #0 {
+   ret i32 0;
+}
+
+attributes #0 = { noinline optnone }
+
+!0 = !{i64 16, !"_ZTS1A"}
+!1 = !{i64 0}
diff --git a/llvm/test/tools/gold/X86/devirt_vcall_vis_shared_def.ll b/llvm/test/tools/gold/X86/devirt_vcall_vis_shared_def.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/gold/X86/devirt_vcall_vis_shared_def.ll
@@ -0,0 +1,124 @@
+;; Test that symbols defined in shared libraries prevent devirtualization.
+
+;; First check that we get devirtualization when the defs are in the
+;; LTO unit.
+
+;; Index based WPD
+;; Generate unsplit module with summary for ThinLTO index-based WPD.
+; RUN: opt --thinlto-bc -o %t1.o %s
+; RUN: opt --thinlto-bc -o %t2.o %S/Inputs/devirt_vcall_vis_shared_def.ll
+; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \
+; RUN:   --plugin-opt=whole-program-visibility \
+; RUN:   --plugin-opt=save-temps \
+; RUN:   --plugin-opt=-pass-remarks=. \
+; RUN:   %t1.o %t2.o -o %t3 2>&1 | FileCheck %s --check-prefix=REMARK
+; RUN: llvm-dis %t1.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
+
+;; Hybrid WPD
+;; Generate split module with summary for hybrid Thin/Regular LTO WPD.
+; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t1.o %s
+; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t2.o %S/Inputs/devirt_vcall_vis_shared_def.ll
+; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \
+; RUN:   --plugin-opt=whole-program-visibility \
+; RUN:   --plugin-opt=save-temps \
+; RUN:   --plugin-opt=-pass-remarks=. \
+; RUN:   %t1.o %t2.o -o %t3 2>&1 | FileCheck %s --check-prefix=REMARK
+; RUN: llvm-dis %t1.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
+
+;; Regular LTO WPD
+; RUN: opt -o %t1.o %s
+; RUN: opt -o %t2.o %S/Inputs/devirt_vcall_vis_shared_def.ll
+; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \
+; RUN:   --plugin-opt=whole-program-visibility \
+; RUN:   --plugin-opt=save-temps \
+; RUN:   --plugin-opt=-pass-remarks=. \
+; RUN:   %t1.o %t2.o -o %t3 2>&1 | FileCheck %s --check-prefix=REMARK
+; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
+
+; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi
+
+;; Check that WPD fails with when linking against a shared library
+;; containing the strong defs of the vtables.
+; RUN: opt -o %t5.o %S/Inputs/devirt_vcall_vis_shared_def.ll
+; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \
+; RUN:   %t5.o -o %t5.so -shared
+
+;; Index based WPD
+; RUN: opt --thinlto-bc -o %t4.o %s
+; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \
+; RUN:   --plugin-opt=whole-program-visibility \
+; RUN:   --plugin-opt=-pass-remarks=. \
+; RUN:   %t4.o %t5.so -o %t4 \
+; RUN:   --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty
+
+;; Hybrid WPD
+; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t4.o %s
+; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \
+; RUN:   --plugin-opt=whole-program-visibility \
+; RUN:   --plugin-opt=-pass-remarks=. \
+; RUN:   %t4.o %t5.so -o %t4 \
+; RUN:   --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty
+
+;; Regular LTO WPD
+; RUN: opt -o %t4.o %s
+; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \
+; RUN:   --plugin-opt=whole-program-visibility \
+; RUN:   --plugin-opt=-pass-remarks=. \
+; RUN:   %t4.o %t5.so -o %t4 \
+; RUN:   --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-grtev4-linux-gnu"
+
+%struct.A = type { i32 (...)** }
+%struct.B = type { %struct.A }
+
+@_ZTV1A = available_externally unnamed_addr constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.A*, i32)* @_ZN1A1fEi to i8*), i8* bitcast (i32 (%struct.A*, i32)* @_ZN1A1nEi to i8*)] }, !type !0, !vcall_visibility !2
+@_ZTV1B = linkonce_odr unnamed_addr constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.B*, i32)* @_ZN1B1fEi to i8*), i8* bitcast (i32 (%struct.A*, i32)* @_ZN1A1nEi to i8*)] }, !type !0, !type !1, !vcall_visibility !2
+
+;; Prevent the vtables from being dead code eliminated.
+@llvm.used = appending global [2 x i8*] [ i8* bitcast ( { [4 x i8*] }* @_ZTV1A to i8*), i8* bitcast ( { [4 x i8*] }* @_ZTV1B to i8*)]
+
+; CHECK-IR-LABEL: define dso_local i32 @_start
+define i32 @_start(%struct.A* %obj, i32 %a) {
+entry:
+  %0 = bitcast %struct.A* %obj to i8***
+  %vtable = load i8**, i8*** %0
+  %1 = bitcast i8** %vtable to i8*
+  %p = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1A")
+  call void @llvm.assume(i1 %p)
+  %fptrptr = getelementptr i8*, i8** %vtable, i32 1
+  %2 = bitcast i8** %fptrptr to i32 (%struct.A*, i32)**
+  %fptr1 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %2, align 8
+
+  ;; Check that the call was devirtualized.
+  ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi
+  ; CHECK-NODEVIRT-IR: %call = tail call i32 %fptr1
+  %call = tail call i32 %fptr1(%struct.A* nonnull %obj, i32 %a)
+
+  ret i32 %call
+}
+; CHECK-IR-LABEL: ret i32
+; CHECK-IR-LABEL: }
+
+declare i1 @llvm.type.test(i8*, metadata)
+declare void @llvm.assume(i1)
+
+define available_externally i32 @_ZN1A1fEi(%struct.A* %this, i32 %a) #0 {
+   ret i32 0;
+}
+
+define available_externally i32 @_ZN1A1nEi(%struct.A* %this, i32 %a) #0 {
+   ret i32 0;
+}
+
+define linkonce_odr i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) #0 {
+   ret i32 0;
+}
+
+;; Make sure we don't inline or otherwise optimize out the direct calls.
+attributes #0 = { noinline optnone }
+
+!0 = !{i64 16, !"_ZTS1A"}
+!1 = !{i64 16, !"_ZTS1B"}
+!2 = !{i64 0}
diff --git a/llvm/tools/gold/gold-plugin.cpp b/llvm/tools/gold/gold-plugin.cpp
--- a/llvm/tools/gold/gold-plugin.cpp
+++ b/llvm/tools/gold/gold-plugin.cpp
@@ -748,12 +748,15 @@
 
     case LDPR_RESOLVED_IR:
     case LDPR_RESOLVED_EXEC:
-    case LDPR_RESOLVED_DYN:
     case LDPR_PREEMPTED_IR:
     case LDPR_PREEMPTED_REG:
     case LDPR_UNDEF:
       break;
 
+    case LDPR_RESOLVED_DYN:
+      R.ExportDynamic = true;
+      break;
+
     case LDPR_PREVAILING_DEF_IRONLY:
       R.Prevailing = !isUndefined(Sym);
       break;