1 files changed, 5 insertions, 2 deletions
diff --git a/lib/Target/Hexagon/HexagonGenMux.cpp b/lib/Target/Hexagon/HexagonGenMux.cpp
index 85222944c77c..3c37d9ebb0eb 100644
--- a/lib/Target/Hexagon/HexagonGenMux.cpp
+++ b/lib/Target/Hexagon/HexagonGenMux.cpp
@@ -40,8 +40,8 @@
 #include "llvm/Pass.h"
 #include "llvm/Support/MathExtras.h"
 #include <algorithm>
-#include <limits>
 #include <iterator>
+#include <limits>
 #include <utility>
 
 using namespace llvm;
@@ -235,8 +235,11 @@ bool HexagonGenMux::genMuxInBlock(MachineBasicBlock &B) {
     unsigned DR = MI->getOperand(0).getReg();
     if (isRegPair(DR))
       continue;
+    MachineOperand &PredOp = MI->getOperand(1);
+    if (PredOp.isUndef())
+      continue;
 
-    unsigned PR = MI->getOperand(1).getReg();
+    unsigned PR = PredOp.getReg();
     unsigned Idx = I2X.lookup(MI);
     CondsetMap::iterator F = CM.find(DR);
     bool IfTrue = HII->isPredicatedTrue(Opc);