Add "add immediate" instruction to the ARM integrated assembler.

src/IceAssemblerARM32.h

 //===- subzero/src/IceAssemblerARM32.h - Assembler for ARM32 ----*- 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 75 matching lines @@
   void bindCfgNodeLabel(SizeT NodeNumber) override {
     assert(!getPreliminary());
     Label *L = getOrCreateCfgNodeLabel(NodeNumber);
     this->bind(L);
   }
 
   bool fixupIsPCRel(FixupKind Kind) const override {
     (void)Kind;
     llvm_unreachable("Not yet implemented.");
   }
+
   void bind(Label *label);
 
+  // List of instructions implemented by integrated assembler.
+
+  void add(const Operand *OpRd, const Operand *OpRn, const Operand *OpSrc1,
+           bool SetFlags, CondARM32::Cond Cond);
+
   void bkpt(uint16_t Imm16);
 
-  void mov(RegARM32::GPRRegister Rd, const OperandARM32FlexImm &FlexImm,
-           CondARM32::Cond Cond);
+  void mov(const Operand *OpRd, const Operand *OpSrc, CondARM32::Cond Cond);
 
   void bx(RegARM32::GPRRegister Rm, CondARM32::Cond Cond = CondARM32::AL);
 
   static bool classof(const Assembler *Asm) {
     return Asm->getKind() == Asm_ARM32;
   }
 
 private:
   // A vector of pool-allocated x86 labels for CFG nodes.
   using LabelVector = std::vector<Label *>;
   LabelVector CfgNodeLabels;
 
   Label *getOrCreateLabel(SizeT Number, LabelVector &Labels);
   Label *getOrCreateCfgNodeLabel(SizeT NodeNumber) {
     return getOrCreateLabel(NodeNumber, CfgNodeLabels);
   }
 
   void emitInst(uint32_t Value) { Buffer.emit<uint32_t>(Value); }
 
   // Pattern cccctttoooosnnnnddddiiiiiiiiiiii where cccc=Cond, ttt=Type,
   // oooo=Opcode, nnnn=Rn, dddd=Rd, iiiiiiiiiiii=imm12 (See ARM section A5.2.3).
   void emitType01(CondARM32::Cond Cond, uint32_t Type, uint32_t Opcode,
                   bool SetCc, uint32_t Rn, uint32_t Rd, uint32_t imm12);
 };
 
 } // end of namespace ARM32
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEASSEMBLERARM32_H