Turn JSArrayBuffer::flags into a bit field

src/hydrogen.cc

 // Copyright 2013 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/hydrogen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 2421 matching lines @@
     } else {
       backing_store = elements;
     }
     if (store_mode == STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS) {
       NoObservableSideEffectsScope no_effects(this);
       if (IsExternalArrayElementsKind(elements_kind)) {
         HInstruction* buffer =
             Add<HLoadNamedField>(checked_object, nullptr,
                                  HObjectAccess::ForJSArrayBufferViewBuffer());
         HInstruction* flags = Add<HLoadNamedField>(
-            buffer, nullptr, HObjectAccess::ForJSArrayBufferFlag());
+            buffer, nullptr, HObjectAccess::ForJSArrayBufferBitField());
         HValue* was_neutered_mask =
-            Add<HConstant>(1 << JSArrayBuffer::kWasNeuteredBit);
+            Add<HConstant>(1 << JSArrayBuffer::WasNeutered::kShift);
         HValue* was_neutered_test =
             AddUncasted<HBitwise>(Token::BIT_AND, flags, was_neutered_mask);
 
         IfBuilder if_was_neutered(this);
         if_was_neutered.If<HCompareNumericAndBranch>(
             was_neutered_test, graph()->GetConstant0(), Token::NE);
         if_was_neutered.ThenDeopt(Deoptimizer::kOutOfBounds);
         if_was_neutered.End();
       }
       IfBuilder length_checker(this);
@@ skipping 733 matching lines @@
       index.offset(), Representation::Tagged());
   HInstruction* buffer = Add<HLoadNamedField>(
       object, checked_object, HObjectAccess::ForJSArrayBufferViewBuffer());
   HInstruction* field = Add<HLoadNamedField>(object, checked_object, access);
 
   IfBuilder if_has_buffer(this);
   HValue* has_buffer = if_has_buffer.IfNot<HIsSmiAndBranch>(buffer);
   if_has_buffer.Then();
   {
     HInstruction* flags = Add<HLoadNamedField>(
-        buffer, has_buffer, HObjectAccess::ForJSArrayBufferFlag());
+        buffer, has_buffer, HObjectAccess::ForJSArrayBufferBitField());
     HValue* was_neutered_mask =
-        Add<HConstant>(1 << JSArrayBuffer::kWasNeuteredBit);
+        Add<HConstant>(1 << JSArrayBuffer::WasNeutered::kShift);
     HValue* was_neutered_test =
         AddUncasted<HBitwise>(Token::BIT_AND, flags, was_neutered_mask);
 
     IfBuilder if_was_neutered(this);
     if_was_neutered.If<HCompareNumericAndBranch>(
         was_neutered_test, graph()->GetConstant0(), Token::NE);
     if_was_neutered.Then();
     Push(graph()->GetConstant0());
     if_was_neutered.Else();
     Push(field);
@@ skipping 9918 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal