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

src/IceAssemblerX8632.h

 //===- subzero/src/assembler_ia32.h - Assembler for x86-32 ------*- C++ -*-===//
 //
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // Modified by the Subzero authors.
 //
 //===----------------------------------------------------------------------===//
 //
@@ skipping 702 matching lines @@
   void Or(Type Ty, GPRRegister dst, const Address &address);
   void Or(Type Ty, GPRRegister dst, const Immediate &imm);
 
   void Xor(Type Ty, GPRRegister dst, GPRRegister src);
   void Xor(Type Ty, GPRRegister dst, const Address &address);
   void Xor(Type Ty, GPRRegister dst, const Immediate &imm);
 
   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);
   void adc(Type Ty, GPRRegister reg, const Immediate &imm);
 
   void sub(Type Ty, GPRRegister dst, GPRRegister src);
   void sub(Type Ty, GPRRegister reg, const Address &address);
   void sub(Type Ty, GPRRegister reg, const Immediate &imm);
 
   void sbb(Type Ty, GPRRegister dst, GPRRegister src);
@@ skipping 150 matching lines @@
 inline void AssemblerX8632::emitFixup(AssemblerFixup *fixup) {
   Buffer.emitFixup(fixup);
 }
 
 inline void AssemblerX8632::emitOperandSizeOverride() { emitUint8(0x66); }
 
 } // end of namespace X8632
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEASSEMBLERX8632_H