A64: Remove early_exit unused mechanism in CompareMap.

src/a64/macro-assembler-a64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1320 matching lines @@
                            InstanceType type,
                            Label* if_not_object);
 
   // Compare instance type in a map.  map contains a valid map object whose
   // object type should be compared with the given type.  This both
   // sets the flags and leaves the object type in the type_reg register.
   void CompareInstanceType(Register map,
                            Register type_reg,
                            InstanceType type);
 
-  // Compare an object's map with the specified map and its transitioned
-  // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. Condition flags are
-  // set with result of map compare. If multiple map compares are required, the
-  // compare sequences branches to early_success.
+  // Compare an object's map with the specified map. Condition flags are set
+  // with result of map compare.
   void CompareMap(Register obj,
                   Register scratch,
-                  Handle<Map> map,
-                  Label* early_success = NULL);
+                  Handle<Map> map);
 
   // As above, but the map of the object is already loaded into the register
   // which is preserved by the code generated.
   void CompareMap(Register obj_map,
-                  Handle<Map> map,
-                  Label* early_success = NULL);
+                  Handle<Map> map);
 
   // Check if the map of an object is equal to a specified map and branch to
   // label if not. Skip the smi check if not required (object is known to be a
   // heap object). If mode is ALLOW_ELEMENT_TRANSITION_MAPS, then also match
   // against maps that are ElementsKind transition maps of the specified map.
   void CheckMap(Register obj,
                 Register scratch,
                 Handle<Map> map,
                 Label* fail,
                 SmiCheckType smi_check_type);
@@ skipping 853 matching lines @@
 #error "Unsupported option"
 #define CODE_COVERAGE_STRINGIFY(x) #x
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 #endif  // V8_A64_MACRO_ASSEMBLER_A64_H_