Delete an unnecessary reference to SelectionDAGISel::BB.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101824 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Sparc/SparcISelDAGToDAG.cpp

@@ -67,7 +67,6 @@ private:
 }  // end anonymous namespace
 
 SDNode* SparcDAGToDAGISel::getGlobalBaseReg() {
-  MachineFunction *MF = BB->getParent();
   unsigned GlobalBaseReg = TM.getInstrInfo()->getGlobalBaseReg(MF);
   return CurDAG->getRegister(GlobalBaseReg, TLI.getPointerTy()).getNode();
 }