diff --git a/lld/test/MachO/hidden-escaped-symbols-alt.ll b/lld/test/MachO/hidden-escaped-symbols-alt.ll
new file mode 100644
--- /dev/null
+++ b/lld/test/MachO/hidden-escaped-symbols-alt.ll
@@ -0,0 +1,22 @@
+; REQUIRES: x86
+; RUN: split-file %s %t
+; RUN: opt -module-summary %t/hide-me.ll -o %t/hide-me.o
+; RUN: opt -module-summary %t/ref.ll -o %t/ref.o
+; RUN: %lld %t/hide-me.o %t/ref.o -o %t/out
+
+;--- hide-me.ll
+target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.7.0"
+
+@"\01_hide_me" = hidden local_unnamed_addr global i8 8, align 1
+
+;--- ref.ll
+target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.7.0"
+
+@hide_me = external local_unnamed_addr global i8
+
+define i8 @main() {
+  %1 = load i8, ptr @hide_me, align 1
+  ret i8 %1
+}
diff --git a/lld/test/MachO/hidden-escaped-symbols.ll b/lld/test/MachO/hidden-escaped-symbols.ll
new file mode 100644
--- /dev/null
+++ b/lld/test/MachO/hidden-escaped-symbols.ll
@@ -0,0 +1,22 @@
+; REQUIRES: x86
+; RUN: split-file %s %t
+; RUN: opt -module-summary %t/hide-me.ll -o %t/hide-me.o
+; RUN: opt -module-summary %t/ref.ll -o %t/ref.o
+; RUN: %lld %t/hide-me.o %t/ref.o -o %t/out
+
+;--- hide-me.ll
+target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.7.0"
+
+@hide_me = hidden local_unnamed_addr global i8 8, align 1
+
+;--- ref.ll
+target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.7.0"
+
+@"\01_hide_me" = external local_unnamed_addr global i8
+
+define i8 @main() {
+  %1 = load i8, ptr @"\01_hide_me", align 1
+  ret i8 %1
+}
diff --git a/llvm/lib/LTO/LTO.cpp b/llvm/lib/LTO/LTO.cpp
--- a/llvm/lib/LTO/LTO.cpp
+++ b/llvm/lib/LTO/LTO.cpp
@@ -567,6 +567,15 @@
       GlobalRes.IRName = std::string(Sym.getIRName());
     }
 
+    // In rare occasion, the symbol used to initialize GlobalRes has a different
+    // IRName from the inspected Symbol. In that case, we have the same actual
+    // Symbol that can get two different GUID, leading to some invalid
+    // dismissal. Workaround this by marking the GlobalRes external.
+    if (GlobalRes.IRName != Sym.getIRName()) {
+      GlobalRes.Partition = GlobalResolution::External;
+      GlobalRes.VisibleOutsideSummary = true;
+    }
+
     // Set the partition to external if we know it is re-defined by the linker
     // with -defsym or -wrap options, used elsewhere, e.g. it is visible to a
     // regular object, is referenced from llvm.compiler.used/llvm.used, or was