Optimize AOT's switchable calls for the monomorphic case.

runtime/vm/code_patcher_arm64_test.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/code_patcher.h"
@@ skipping 35 matching lines @@
   // Code accessing pp is generated, but not executed. Uninitialized pp is OK.
   __ set_constant_pool_allowed(true);
 
   __ LoadObject(R5, ic_data);
   __ BranchLinkPatchable(*StubCode::OneArgCheckInlineCache_entry());
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(IcDataAccess, test) {
-  uword return_address =
-      test->entry() + test->code().Size() - Instr::kInstrSize;
+  uword end = test->payload_start() + test->code().Size();
+  uword return_address = end - Instr::kInstrSize;
   ICData& ic_data = ICData::Handle();
   CodePatcher::GetInstanceCallAt(return_address, test->code(), &ic_data);
   EXPECT_STREQ("targetFunction",
       String::Handle(ic_data.target_name()).ToCString());
   EXPECT_EQ(1, ic_data.NumArgsTested());
   EXPECT_EQ(0, ic_data.NumberOfChecks());
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64