Fix unused variable error.
Earlier, this variable was used in an assert and was causing failure on
darwin.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181630 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Hexagon/HexagonFrameLowering.cpp b/lib/Target/Hexagon/HexagonFrameLowering.cpp
index 77ad70d..0fda4ed 100644
--- a/lib/Target/Hexagon/HexagonFrameLowering.cpp
+++ b/lib/Target/Hexagon/HexagonFrameLowering.cpp
@@ -184,8 +184,7 @@
     const TargetInstrInfo &TII = *MF.getTarget().getInstrInfo();
     // Handle EH_RETURN.
     if (MBBI->getOpcode() == Hexagon::EH_RETURN_JMPR) {
-      MachineOperand &OffsetReg  = MBBI->getOperand(0);
-      assert(OffsetReg.isReg() && "Offset should be in register!");
+      assert(MBBI->getOperand(0).isReg() && "Offset should be in register!");
       BuildMI(MBB, MBBI, dl, TII.get(Hexagon::DEALLOCFRAME));
       BuildMI(MBB, MBBI, dl, TII.get(Hexagon::ADD_rr),
               Hexagon::R29).addReg(Hexagon::R29).addReg(Hexagon::R28);