[SubZero] Provide repointEdges for MIPS

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 600 matching lines @@
     return new (Func->allocate<InstMIPS32Br>())
         InstMIPS32Br(Func, TargetTrue, TargetFalse, Src0, NoLabel, Cond);
   }
 
   const CfgNode *getTargetTrue() const { return TargetTrue; }
   const CfgNode *getTargetFalse() const { return TargetFalse; }
 
   bool isUnconditionalBranch() const override {
     return Predicate == CondMIPS32::AL;
   }
-  bool repointEdges(CfgNode *OldNode, CfgNode *NewNode) override {
-    (void)OldNode;
-    (void)NewNode;
-    return true;
-  };
+  bool repointEdges(CfgNode *OldNode, CfgNode *NewNode) override;
   void emit(const Cfg *Func) const override;
   void emitIAS(const Cfg *Func) const override { (void)Func; };
   void dump(const Cfg *Func) const override;
   static bool classof(const Inst *Instr) { return isClassof(Instr, Br); }
 
 private:
   InstMIPS32Br(Cfg *Func, const CfgNode *TargetTrue, const CfgNode *TargetFalse,
                const InstMIPS32Label *Label, const CondMIPS32::Cond Cond);
 
   InstMIPS32Br(Cfg *Func, const CfgNode *TargetTrue, const CfgNode *TargetFalse,
@@ skipping 213 matching lines @@
 template <> void InstMIPS32Mtlo::emit(const Cfg *Func) const;
 template <> void InstMIPS32Mthi::emit(const Cfg *Func) const;
 template <> void InstMIPS32Mult::emit(const Cfg *Func) const;
 template <> void InstMIPS32Multu::emit(const Cfg *Func) const;
 template <> void InstMIPS32Lui::emit(const Cfg *Func) const;
 
 } // end of namespace MIPS32
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEINSTMIPS32_H