Inline instance object hash code into object header on 64 bit.

runtime/vm/method_recognizer.h

Index: runtime/vm/method_recognizer.h
diff --git a/runtime/vm/method_recognizer.h b/runtime/vm/method_recognizer.h
index e572e49f3182e4d57630fe8fd37b818ce1310a10..b6547aceb187354b2c6a56fccd9cf293d0e50a33 100644
--- a/runtime/vm/method_recognizer.h
+++ b/runtime/vm/method_recognizer.h
@@ -139,7 +139,7 @@ namespace dart {
 
 // List of intrinsics:
 // (class-name, function-name, intrinsification method, fingerprint).
-#define CORE_LIB_INTRINSIC_LIST(V)                                             \
+#define CORE_LIB_NON_HASH_INTRINSIC_LIST(V)                                    \
   V(_Smi, ~, Smi_bitNegate, Smi, 0x6574c6b0)                                   \
   V(_Smi, get:bitLength, Smi_bitLength, Smi, 0x25b356ab)                       \
   V(_Smi, _bitAndFromSmi, Smi_bitAndFromSmi, Smi, 0x490a4da1)                  \
@@ -190,6 +190,19 @@ namespace dart {
   V(_TwoByteString, ==, TwoByteString_equality, Bool, 0x4719e83f)              \
 
 
+#define CORE_LIB_IN_HEADER_HASH_INTRINSIC_LIST(V)                              \
+  V(::, _getHash, Object_getHash, Smi, 0x2827856d)                             \
+  V(::, _setHash, Object_setHash, Object, 0x302d1fe8)                          \
+
+#if defined(HASH_IN_OBJECT_HEADER)
+#define CORE_LIB_INTRINSIC_LIST(V)                                             \
+  CORE_LIB_NON_HASH_INTRINSIC_LIST(V)                                          \
+  CORE_LIB_IN_HEADER_HASH_INTRINSIC_LIST(V)
+#else
+#define CORE_LIB_INTRINSIC_LIST(V)                                             \
+  CORE_LIB_NON_HASH_INTRINSIC_LIST(V)
+#endif
+
 #define CORE_INTEGER_LIB_INTRINSIC_LIST(V)                                     \
   V(_IntegerImplementation, _addFromInteger, Integer_addFromInteger,           \
     Dynamic, 0x6a10c54a)                                                       \