Fix field type handling in load elimination.

src/arm64/lithium-codegen-arm64.cc

 // 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 2117 matching lines @@
   Register map_reg = ToRegister(instr->temp());
 
   __ Ldr(map_reg, FieldMemOperand(object, HeapObject::kMapOffset));
 
   DeferredCheckMaps* deferred = NULL;
   if (instr->hydrogen()->has_migration_target()) {
     deferred = new(zone()) DeferredCheckMaps(this, instr, object);
     __ Bind(deferred->check_maps());
   }
 
-  UniqueSet<Map> map_set = instr->hydrogen()->map_set();
+  const UniqueSet<Map>* map_set = instr->hydrogen()->map_set();
   Label success;
-  for (int i = 0; i < map_set.size() - 1; i++) {
-    Handle<Map> map = map_set.at(i).handle();
+  for (int i = 0; i < map_set->size() - 1; i++) {
+    Handle<Map> map = map_set->at(i).handle();
     __ CompareMap(map_reg, map);
     __ B(eq, &success);
   }
-  Handle<Map> map = map_set.at(map_set.size() - 1).handle();
+  Handle<Map> map = map_set->at(map_set->size() - 1).handle();
   __ CompareMap(map_reg, map);
 
   // We didn't match a map.
   if (instr->hydrogen()->has_migration_target()) {
     __ B(ne, deferred->entry());
   } else {
     DeoptimizeIf(ne, instr->environment());
   }
 
   __ Bind(&success);
@@ skipping 3773 matching lines @@
   __ Ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
   // Index is equal to negated out of object property index plus 1.
   __ Sub(result, result, Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ Ldr(result, FieldMemOperand(result,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ Bind(deferred->exit());
   __ Bind(&done);
 }
 
 } }  // namespace v8::internal