Don't leak operands when putting them into a shift.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135169 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 2c45d2e..6783bc3 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -1085,7 +1085,7 @@
   // The source register for the shift has already been added to the
   // operand list, so we need to pop it off and combine it into the shifted
   // register operand instead.
-  ARMOperand *PrevOp = (ARMOperand*)Operands.pop_back_val();
+  OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
   if (!PrevOp->isReg())
     return Error(PrevOp->getStartLoc(), "shift must be of a register");
   int SrcReg = PrevOp->getReg();