[Hexagon] Remove variable unused in NDEBUG build

llvm-svn: 254623
diff --git a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
index a75f391..b59fe6b 100644
--- a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
@@ -2380,9 +2380,8 @@
 
   if (UseHVX) {
     SDValue Vec0 = Op.getOperand(1);
-    uint64_t VS = VecVT.getSizeInBits();
-    assert((VS == 64*8 && Subtarget.useHVXSglOps()) ||
-           (VS == 128*8 && Subtarget.useHVXDblOps()));
+    assert((VecVT.getSizeInBits() == 64*8 && Subtarget.useHVXSglOps()) ||
+           (VecVT.getSizeInBits() == 128*8 && Subtarget.useHVXDblOps()));
     SDValue Combined = DAG.getNode(HexagonISD::VCOMBINE, dl, VT, Vec0, Vec);
     return Combined;
   }