Add AddImmediate(reg, int) to ARM64 assembler

runtime/vm/assembler_arm64_test.cc

 // 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.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/os.h"
@@ skipping 2323 matching lines @@
 
 
 ASSEMBLER_TEST_GENERATE(FldrdFstrdHeapTag, assembler) {
   __ SetupDartSP();
   __ LoadDImmediate(V0, 43.0);
   __ LoadDImmediate(V1, 42.0);
   __ AddImmediate(SP, SP, -1 * kWordSize);
   __ add(R2, SP, Operand(1));
   __ fstrd(V1, Address(R2, -1));
   __ fldrd(V0, Address(R2, -1));
-  __ AddImmediate(SP, SP, 1 * kWordSize);
+  __ AddImmediate(SP, 1 * kWordSize);
   __ RestoreCSP();
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(FldrdFstrdHeapTag, test) {
   typedef double (*DoubleReturn)() DART_UNUSED;
   EXPECT_EQ(42.0, EXECUTE_TEST_CODE_DOUBLE(DoubleReturn, test->entry()));
 }
 
@@ skipping 1437 matching lines @@
   __ Pop(LR);
   __ Pop(THR);
   __ Pop(CODE_REG);
   __ RestoreCSP();
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_ARCH_ARM64)