Index: lib/DebugInfo/Symbolize/Symbolize.cpp
===================================================================
--- lib/DebugInfo/Symbolize/Symbolize.cpp
+++ lib/DebugInfo/Symbolize/Symbolize.cpp
@@ -355,8 +355,17 @@
   auto ObjectsOrErr = getOrCreateObjects(BinaryName, ArchName);
   if (auto EC = ObjectsOrErr.getError()) {
     // Failed to find valid object file.
-    Modules.insert(std::make_pair(ModuleName, EC));
-    return EC;
+    // For x86_64h, fallback to x86_64.
+    if (ArchName == "x86_64h") {
+      ObjectsOrErr = getOrCreateObjects(BinaryName, "x86_64");
+      if (auto EC = ObjectsOrErr.getError()) {
+        Modules.insert(std::make_pair(ModuleName, EC));
+        return EC;
+      }
+    } else {
+      Modules.insert(std::make_pair(ModuleName, EC));
+      return EC;
+    }
   }
   ObjectPair Objects = ObjectsOrErr.get();