Followup to previous MIPS commit: implement dump(), rebase more.

src/IceInstMIPS32.h

 //===- subzero/src/IceInstMIPS32.h - MIPS32 machine instrs --*- C++ -*-===    //
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 24 matching lines @@
 public:
   enum InstKindMIPS32 { k__Start = Inst::Target, Ret };
 
   static const char *getWidthString(Type Ty);
 
   void dump(const Cfg *Func) const override;
 
 protected:
   InstMIPS32(Cfg *Func, InstKindMIPS32 Kind, SizeT Maxsrcs, Variable *Dest)
       : InstTarget(Func, static_cast<InstKind>(Kind), Maxsrcs, Dest) {}
-  ~InstMIPS32() override {}
   static bool isClassof(const Inst *Inst, InstKindMIPS32 MyKind) {
     return Inst->getKind() == static_cast<InstKind>(MyKind);
   }
 };
 
 /// Ret pseudo-instruction.  This is actually a "jr" instruction with
 /// an "ra" register operand, but epilogue lowering will search for a Ret
 /// instead of a generic "jr". This instruction also takes a Source
 /// operand (for non-void returning functions) for liveness analysis, though
 /// a FakeUse before the ret would do just as well.
@@ skipping 11 matching lines @@
     return new (Func->allocate<InstMIPS32Ret>())
         InstMIPS32Ret(Func, RA, Source);
   }
   void emit(const Cfg *Func) const override;
   void emitIAS(const Cfg *Func) const override;
   void dump(const Cfg *Func) const override;
   static bool classof(const Inst *Inst) { return isClassof(Inst, Ret); }
 
 private:
   InstMIPS32Ret(Cfg *Func, Variable *RA, Variable *Source);
-  ~InstMIPS32Ret() override {}
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEINSTMIPS32_H