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

src/IceAssemblerX8632.h

Index: src/IceAssemblerX8632.h
diff --git a/src/IceAssemblerX8632.h b/src/IceAssemblerX8632.h
index c67f4cec804c564e7b241b7ed9949801f803065a..346000d1c911fe474865c5bacfe788b9cb455b37 100644
--- a/src/IceAssemblerX8632.h
+++ b/src/IceAssemblerX8632.h
@@ -720,6 +720,8 @@ public:
   void add(Type Ty, GPRRegister dst, GPRRegister src);
   void add(Type Ty, GPRRegister reg, const Address &address);
   void add(Type Ty, GPRRegister reg, const Immediate &imm);
+  void add(Type Ty, const Address &address, GPRRegister reg);
+  void add(Type Ty, const Address &address, const Immediate &imm);
 
   void adc(Type Ty, GPRRegister dst, GPRRegister src);
   void adc(Type Ty, GPRRegister dst, const Address &address);