Remove obsolete elements kind check for array literals.

src/hydrogen.cc

 // Copyright 2012 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 6032 matching lines @@
                                data_size,
                                pointer_size,
                                mode);
   } else {
     NoObservableSideEffectsScope no_effects(this);
     // Boilerplate already exists and constant elements are never accessed,
     // pass an empty fixed array to the runtime function instead.
     Handle<FixedArray> constants = isolate()->factory()->empty_fixed_array();
     int literal_index = expr->literal_index();
 
-    // TODO(mstarzinger): The following check and deopt is actually obsolete
-    // but test cases for the tick processor fails because profile differs.
-
-    // Deopt if the array literal boilerplate ElementsKind is of a type
-    // different than the expected one. The check isn't necessary if the
-    // boilerplate has already been converted to TERMINAL_FAST_ELEMENTS_KIND.
-    if (CanTransitionToMoreGeneralFastElementsKind(
-            boilerplate_elements_kind, true)) {
-      IfBuilder builder(this);
-      HValue* boilerplate = AddInstruction(new(zone())
-          HConstant(original_boilerplate_object));
-      HValue* elements_kind = AddInstruction(new(zone())
-          HElementsKind(boilerplate));
-      HValue* expected_kind = AddInstruction(new(zone())
-          HConstant(boilerplate_elements_kind));
-      builder.IfCompare(elements_kind, expected_kind, Token::EQ);
-      builder.Then();
-      builder.ElseDeopt();
-    }
-
     AddInstruction(new(zone()) HPushArgument(AddInstruction(
         new(zone()) HConstant(literals))));
     AddInstruction(new(zone()) HPushArgument(AddInstruction(
         new(zone()) HConstant(literal_index))));
     AddInstruction(new(zone()) HPushArgument(AddInstruction(
         new(zone()) HConstant(constants))));
 
     Runtime::FunctionId function_id = (expr->depth() > 1)
         ? Runtime::kCreateArrayLiteral : Runtime::kCreateArrayLiteralShallow;
     literal = AddInstruction(
@@ skipping 5574 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal