Subzero: Transform suitable Load/Arith/Store sequences into RMW ops.

src/IceTargetLowering.h

 //===- subzero/src/IceTargetLowering.h - Lowering interface -----*- 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 TargetLowering, LoweringContext, and
@@ skipping 230 matching lines @@
   virtual void lowerIcmp(const InstIcmp *Inst) = 0;
   virtual void lowerInsertElement(const InstInsertElement *Inst) = 0;
   virtual void lowerIntrinsicCall(const InstIntrinsicCall *Inst) = 0;
   virtual void lowerLoad(const InstLoad *Inst) = 0;
   virtual void lowerPhi(const InstPhi *Inst) = 0;
   virtual void lowerRet(const InstRet *Inst) = 0;
   virtual void lowerSelect(const InstSelect *Inst) = 0;
   virtual void lowerStore(const InstStore *Inst) = 0;
   virtual void lowerSwitch(const InstSwitch *Inst) = 0;
   virtual void lowerUnreachable(const InstUnreachable *Inst) = 0;
+  virtual void lowerOther(const Inst *Instr);
 
   virtual void doAddressOptLoad() {}
   virtual void doAddressOptStore() {}
   virtual void randomlyInsertNop(float Probability) = 0;
   // This gives the target an opportunity to post-process the lowered
   // expansion before returning.
   virtual void postLower() {}
 
   // Find two-address non-SSA instructions and set the DestNonKillable flag
   // to keep liveness analysis consistent.
@@ skipping 150 matching lines @@
   virtual void lower() {}
 
 protected:
   explicit TargetHeaderLowering(GlobalContext *Ctx) : Ctx(Ctx) {}
   GlobalContext *Ctx;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERING_H