emit add/sub registers instructions in integrated ARM assembler.

src/DartARM32/assembler_arm.h

 // 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.
 //
 // This is forked from Dart revision df52deea9f25690eb8b66c5995da92b70f7ac1fe
 // Please update the (git) revision if we merge changes from Dart.
 // https://code.google.com/p/dart/wiki/GettingTheSource
 
 #ifndef VM_ASSEMBLER_ARM_H_
 #define VM_ASSEMBLER_ARM_H_
@@ skipping 140 matching lines @@
 
 #if 0
   // Moved to decodeOperand() in IceAssemblerARM32.cpp
   // Data-processing operands - Register.
   explicit Operand(Register rm) {
     type_ = 0;
     encoding_ = static_cast<uint32_t>(rm);
   }
 #endif
 
+#if 0
+  // Moved to encodeShiftRotateImm5()
   // Data-processing operands - Logical shift/rotate by immediate.
   Operand(Register rm, Shift shift, uint32_t shift_imm) {
     ASSERT(shift_imm < (1 << kShiftImmBits));
     type_ = 0;
     encoding_ = shift_imm << kShiftImmShift |
                 static_cast<uint32_t>(shift) << kShiftShift |
                 static_cast<uint32_t>(rm);
   }
+#endif
 
   // Data-processing operands - Logical shift/rotate by register.
   Operand(Register rm, Shift shift, Register rs) {
     type_ = 0;
     encoding_ = static_cast<uint32_t>(rs) << kShiftRegisterShift |
                 static_cast<uint32_t>(shift) << kShiftShift | (1 << 4) |
                 static_cast<uint32_t>(rm);
   }
 
   static bool CanHold(uint32_t immediate, Operand* o) {
@@ skipping 1064 matching lines @@
                      Register new_value,
                      FieldContent old_content);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM_H_