[turbofan] Add FixedArray peephole optimizations to CodeStubAssembler

src/interpreter/interpreter.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/interpreter/interpreter.h"
 
 #include <fstream>
 
 #include "src/ast/prettyprinter.h"
 #include "src/code-factory.h"
@@ skipping 1702 matching lines @@
   Node* receiver_reg = __ BytecodeOperandReg(0);
   Node* receiver = __ LoadRegister(receiver_reg);
   Node* index_reg = __ BytecodeOperandReg(1);
   Node* index = __ LoadRegister(index_reg);
   Node* cache_type_reg = __ BytecodeOperandReg(2);
   Node* cache_type = __ LoadRegister(cache_type_reg);
   Node* cache_array_reg = __ NextRegister(cache_type_reg);
   Node* cache_array = __ LoadRegister(cache_array_reg);
 
   // Load the next key from the enumeration array.
-  Node* key = __ LoadFixedArrayElementSmiIndex(cache_array, index);
+  Node* key = __ LoadFixedArrayElement(cache_array, index, 0,
+                                       CodeStubAssembler::SMI_PARAMETERS);
 
   // Check if we can use the for-in fast path potentially using the enum cache.
   Label if_fast(assembler), if_slow(assembler, Label::kDeferred);
   Node* receiver_map = __ LoadObjectField(receiver, HeapObject::kMapOffset);
   Node* condition = __ WordEqual(receiver_map, cache_type);
   __ BranchIf(condition, &if_fast, &if_slow);
   __ Bind(&if_fast);
   {
     // Enum cache in use for {receiver}, the {key} is definitely valid.
     __ SetAccumulator(key);
     __ Dispatch();
   }
   __ Bind(&if_slow);
   {
     // Record the fact that we hit the for-in slow path.
     Node* vector_index = __ BytecodeOperandIdx(3);
     Node* type_feedback_vector = __ LoadTypeFeedbackVector();
     Node* megamorphic_sentinel =
         __ HeapConstant(TypeFeedbackVector::MegamorphicSentinel(isolate_));
-    __ StoreFixedArrayElementNoWriteBarrier(type_feedback_vector, vector_index,
-                                            megamorphic_sentinel);
+    __ StoreFixedArrayElement(type_feedback_vector, vector_index,
+                              megamorphic_sentinel, SKIP_WRITE_BARRIER);
 
     // Need to filter the {key} for the {receiver}.
     Node* context = __ GetContext();
     Node* result =
         __ CallRuntime(Runtime::kForInFilter, context, receiver, key);
     __ SetAccumulator(result);
     __ Dispatch();
   }
 }
 
@@ skipping 100 matching lines @@
   __ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset,
       __ SmiTag(new_state));
   __ SetAccumulator(old_state);
 
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8