VM: Reland Inline instance object hash code into object header on 64bit.

runtime/vm/intrinsifier_arm.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"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 1857 matching lines @@
   __ Bind(&return_false);
   __ Pop(R4);
   __ LoadObject(R0, Bool::False());
   __ Ret();
 
   __ Bind(&fall_through);
   __ Pop(R4);
 }
 
 
+void Intrinsifier::Object_getHash(Assembler* assembler) {
+  UNREACHABLE();
+}
+
+
+void Intrinsifier::Object_setHash(Assembler* assembler) {
+  UNREACHABLE();
+}
+
+
 void Intrinsifier::StringBaseCharAt(Assembler* assembler) {
   Label fall_through, try_two_byte_string;
 
   __ ldr(R1, Address(SP, 0 * kWordSize));  // Index.
   __ ldr(R0, Address(SP, 1 * kWordSize));  // String.
   __ tst(R1, Operand(kSmiTagMask));
   __ b(&fall_through, NE);  // Index is not a Smi.
   // Range check.
   __ ldr(R2, FieldAddress(R0, String::length_offset()));
   __ cmp(R1, Operand(R2));
@@ skipping 424 matching lines @@
 
 void Intrinsifier::SetAsyncThreadStackTrace(Assembler* assembler) {
   __ ldr(R0, Address(THR, Thread::async_stack_trace_offset()));
   __ LoadObject(R0, Object::null_object());
   __ Ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM