Subzero: Initial O2 lowering

src/IceTargetLoweringX8632.h

Index: src/IceTargetLoweringX8632.h
diff --git a/src/IceTargetLoweringX8632.h b/src/IceTargetLoweringX8632.h
index e5f8be28e5c5aa18fca5166038d5e0f7e4031041..8931466abfe96f3f182023bf2f1c7487872d54a5 100644
--- a/src/IceTargetLoweringX8632.h
+++ b/src/IceTargetLoweringX8632.h
@@ -27,6 +27,7 @@ public:
   static TargetX8632 *create(Cfg *Func) { return new TargetX8632(Func); }
 
   virtual void translateOm1();
+  virtual void translateO2();
 
   virtual Variable *getPhysicalRegister(SizeT RegNum);
   virtual IceString getRegName(SizeT RegNum, Type Ty) const;
@@ -89,6 +90,8 @@ protected:
   virtual void lowerStore(const InstStore *Inst);
   virtual void lowerSwitch(const InstSwitch *Inst);
   virtual void lowerUnreachable(const InstUnreachable *Inst);
+  virtual void doAddressOptLoad();
+  virtual void doAddressOptStore();
 
   // Operand legalization helpers.  To deal with address mode
   // constraints, the helpers will create a new Operand and emit
@@ -265,8 +268,8 @@ private:
   template <typename T> void emitConstantPool() const;
 };
 
-template <> void ConstantFloat::emit(const Cfg *Func) const;
-template <> void ConstantDouble::emit(const Cfg *Func) const;
+template <> void ConstantFloat::emit(GlobalContext *Ctx) const;
+template <> void ConstantDouble::emit(GlobalContext *Ctx) const;
 
 } // end of namespace Ice