HexagonInstPrinter.cpp: Suppress -Wunused-variable warnings with -Asserts.

llvm-svn: 155281
diff --git a/llvm/lib/Target/Hexagon/InstPrinter/HexagonInstPrinter.cpp b/llvm/lib/Target/Hexagon/InstPrinter/HexagonInstPrinter.cpp
index ef36881..47384cd 100644
--- a/llvm/lib/Target/Hexagon/InstPrinter/HexagonInstPrinter.cpp
+++ b/llvm/lib/Target/Hexagon/InstPrinter/HexagonInstPrinter.cpp
@@ -113,24 +113,21 @@
 
 void HexagonInstPrinter::printGlobalOperand(const MCInst *MI, unsigned OpNo,
                                             raw_ostream &O) const {
-  const MCOperand& MO = MI->getOperand(OpNo);
-  assert(MO.isExpr() && "Expecting expression");
+  assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
 
   printOperand(MI, OpNo, O);
 }
 
 void HexagonInstPrinter::printJumpTable(const MCInst *MI, unsigned OpNo,
                                         raw_ostream &O) const {
-  const MCOperand& MO = MI->getOperand(OpNo);
-  assert(MO.isExpr() && "Expecting expression");
+  assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
 
   printOperand(MI, OpNo, O);
 }
 
 void HexagonInstPrinter::printConstantPool(const MCInst *MI, unsigned OpNo,
                                            raw_ostream &O) const {
-  const MCOperand& MO = MI->getOperand(OpNo);
-  assert(MO.isExpr() && "Expecting expression");
+  assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
 
   printOperand(MI, OpNo, O);
 }