diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index f4b2a9b..d89aad0 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -390,7 +390,7 @@
                         ++numJoined;
                     }
                 }
-                else if (MRegisterInfo::isPhysicalRegister(intA->reg) xor
+                else if (MRegisterInfo::isPhysicalRegister(intA->reg) ^
                          MRegisterInfo::isPhysicalRegister(intB->reg)) {
                     if (MRegisterInfo::isPhysicalRegister(intB->reg)) {
                         std::swap(regA, regB);