Make subtype test stubs isolate-specific.

runtime/vm/stub_code_arm64.cc

 // Copyright (c) 2014, 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/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 1847 matching lines @@
 // Used to check class and type arguments. Arguments passed in registers:
 // LR: return address.
 // R0: instance (must be preserved).
 // R1: instantiator type arguments or NULL.
 // R2: cache array.
 // Result in R1: null -> not found, otherwise result (true or false).
 static void GenerateSubtypeNTestCacheStub(Assembler* assembler, int n) {
   ASSERT((1 <= n) && (n <= 3));
   if (n > 1) {
     // Get instance type arguments.
-    __ LoadClass(R3, R0, kNoPP);
+    __ LoadClass(R3, R0, Isolate::Current(), kNoPP);
     // Compute instance type arguments into R4.
     Label has_no_type_arguments;
     __ LoadObject(R4, Object::null_object(), PP);
     __ LoadFieldFromOffset(R5, R3,
         Class::type_arguments_field_offset_in_words_offset(), kNoPP, kWord);
     __ CompareImmediate(R5, Class::kNoTypeArguments, kNoPP);
     __ b(&has_no_type_arguments, EQ);
     __ add(R5, R0, Operand(R5, LSL, 3));
     __ LoadFieldFromOffset(R4, R5, 0, kNoPP);
     __ Bind(&has_no_type_arguments);
@@ skipping 245 matching lines @@
   const Register right = R0;
   __ LoadFromOffset(left, SP, 1 * kWordSize, kNoPP);
   __ LoadFromOffset(right, SP, 0 * kWordSize, kNoPP);
   GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64