Compress deopt instructions in memory using variable length encoding.

runtime/vm/service_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 "platform/globals.h"
 
 #include "include/dart_debugger_api.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
@@ skipping 272 matching lines @@
 
   // bool
   service_msg = Eval(lib, "[0, port, 'getObject', "
                      "['objectId'], ['objects/bool-true']]");
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   handler.filterMsg("_vmName");
   handler.filterMsg("size");
   EXPECT_STREQ(
       "{\"type\":\"bool\","
-      "\"class\":{\"type\":\"@Class\",\"id\":\"classes\\/46\","
+      "\"class\":{\"type\":\"@Class\",\"id\":\"classes\\/45\","
       "\"name\":\"bool\"},"
       "\"fields\":[],\"id\":\"objects\\/bool-true\","
       "\"valueAsString\":\"true\"}",
       handler.msg());
 
   // int
   service_msg = Eval(lib, "[0, port, 'getObject', "
                      "['objectId'], ['objects/int-123']]");
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   handler.filterMsg("_vmName");
   EXPECT_STREQ(
       "{\"type\":\"int\",\"_vmType\":\"Smi\","
-      "\"class\":{\"type\":\"@Class\",\"id\":\"classes\\/42\","
+      "\"class\":{\"type\":\"@Class\",\"id\":\"classes\\/41\","
       "\"name\":\"_Smi\",},"
       "\"fields\":[],"
       "\"id\":\"objects\\/int-123\","
       "\"valueAsString\":\"123\"}",
       handler.msg());
 
   // object id ring / valid
   service_msg = Eval(lib, "[0, port, 'getObject', "
                      "['objectId'], ['objects/$validId']]");
   Service::HandleIsolateMessage(isolate, service_msg);
@@ skipping 1154 matching lines @@
       Eval(lib, "[0, port, 'getCpuProfile', ['tags'], ['Bogus']]");
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   // Expect error.
   EXPECT_SUBSTRING("\"type\":\"Error\"", handler.msg());
 }
 
 #endif  // !defined(TARGET_ARCH_ARM64)
 
 }  // namespace dart