Add dtor to InstX8632Lockable.

src/IceInstX8632.h

 //===- subzero/src/IceInstX8632.h - Low-level x86 instructions --*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the InstX8632 and OperandX8632 classes and
@@ skipping 603 matching lines @@
 protected:
   bool Locked;
 
   InstX8632Lockable(Cfg *Func, InstKindX8632 Kind, SizeT Maxsrcs,
                     Variable *Dest, bool Locked)
       : InstX8632(Func, Kind, Maxsrcs, Dest), Locked(Locked) {
     // Assume that such instructions are used for Atomics and be careful
     // with optimizations.
     HasSideEffects = Locked;
   }
+  virtual ~InstX8632Lockable() {}
 
 private:
   InstX8632Lockable(const InstX8632Lockable &) LLVM_DELETED_FUNCTION;
   InstX8632Lockable &operator=(const InstX8632Lockable &) LLVM_DELETED_FUNCTION;
 };
 
 // Mul instruction - unsigned multiply.
 class InstX8632Mul : public InstX8632 {
 public:
   static InstX8632Mul *create(Cfg *Func, Variable *Dest, Variable *Source1,
@@ skipping 551 matching lines @@
 private:
   InstX8632Xchg(Cfg *Func, Operand *Dest, Variable *Source);
   InstX8632Xchg(const InstX8632Xchg &) LLVM_DELETED_FUNCTION;
   InstX8632Xchg &operator=(const InstX8632Xchg &) LLVM_DELETED_FUNCTION;
   virtual ~InstX8632Xchg() {}
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEINSTX8632_H