Add AddImmediate(reg, int) to ARM64 assembler

runtime/vm/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.
 
 #ifndef RUNTIME_VM_ASSEMBLER_ARM_H_
 #define RUNTIME_VM_ASSEMBLER_ARM_H_
 
 #ifndef RUNTIME_VM_ASSEMBLER_H_
 #error Do not include assembler_arm.h directly; use assembler.h instead.
 #endif
@@ skipping 710 matching lines @@
 
   // Emit a call that shares its object pool entries with other calls
   // that have the same equivalence marker.
   void BranchLinkWithEquivalence(const StubEntry& stub_entry,
                                  const Object& equivalence);
 
   // Branch and link to [base + offset]. Call sequence is never patched.
   void BranchLinkOffset(Register base, int32_t offset);
 
   // Add signed immediate value to rd. May clobber IP.
-  void AddImmediate(Register rd, int32_t value, Condition cond = AL);
+  void AddImmediate(Register rd, int32_t value, Condition cond = AL) {
+    AddImmediate(rd, rd, value, cond);
+  }
+
+  // Add signed immediate value. May clobber IP.
   void AddImmediate(Register rd,
                     Register rn,
                     int32_t value,
                     Condition cond = AL);
   void AddImmediateSetFlags(Register rd,
                             Register rn,
                             int32_t value,
                             Condition cond = AL);
   void SubImmediateSetFlags(Register rd,
                             Register rn,
@@ skipping 510 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_ASSEMBLER_ARM_H_