Index: lib/CodeGen/MachineOperand.cpp
===================================================================
--- lib/CodeGen/MachineOperand.cpp
+++ lib/CodeGen/MachineOperand.cpp
@@ -348,7 +348,7 @@
     return hash_combine(MO.getType(), MO.getTargetFlags(), MO.getIndex());
   case MachineOperand::MO_ExternalSymbol:
     return hash_combine(MO.getType(), MO.getTargetFlags(), MO.getOffset(),
-                        MO.getSymbolName());
+                        StringRef(MO.getSymbolName()));
   case MachineOperand::MO_GlobalAddress:
     return hash_combine(MO.getType(), MO.getTargetFlags(), MO.getGlobal(),
                         MO.getOffset());
Index: unittests/CodeGen/MachineOperandTest.cpp
===================================================================
--- unittests/CodeGen/MachineOperandTest.cpp
+++ unittests/CodeGen/MachineOperandTest.cpp
@@ -398,4 +398,13 @@
   ASSERT_TRUE(OS.str() == "intpred(eq)");
 }
 
+TEST(MachineOperandTest, HashValue) {
+  char SymName1[] = "test";
+  char SymName2[] = "test";
+  MachineOperand MO1 = MachineOperand::CreateES(SymName1);
+  MachineOperand MO2 = MachineOperand::CreateES(SymName2);
+  ASSERT_EQ(hash_value(MO1), hash_value(MO2));
+  ASSERT_TRUE(MO1.isIdenticalTo(MO2));
+}
+
 } // end namespace