Introduce LiteralsArray to hide it's implementation.

src/code-stubs-hydrogen.cc

 // Copyright 2012 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/code-stubs.h"
 
 #include "src/bailout-reason.h"
 #include "src/field-index.h"
 #include "src/hydrogen.h"
 #include "src/ic/ic.h"
@@ skipping 424 matching lines @@
 template <>
 HValue* CodeStubGraphBuilder<FastCloneShallowArrayStub>::BuildCodeStub() {
   Factory* factory = isolate()->factory();
   HValue* undefined = graph()->GetConstantUndefined();
   AllocationSiteMode alloc_site_mode = casted_stub()->allocation_site_mode();
 
   // This stub is very performance sensitive, the generated code must be tuned
   // so that it doesn't build and eager frame.
   info()->MarkMustNotHaveEagerFrame();
 
-  HInstruction* allocation_site =
-      Add<HLoadKeyed>(GetParameter(0), GetParameter(1), nullptr, FAST_ELEMENTS);
+  HInstruction* allocation_site = Add<HLoadKeyed>(
+      GetParameter(0), GetParameter(1), nullptr, FAST_ELEMENTS,
+      NEVER_RETURN_HOLE, LiteralsArray::kOffsetToFirstLiteral - kHeapObjectTag);
   IfBuilder checker(this);
   checker.IfNot<HCompareObjectEqAndBranch, HValue*>(allocation_site,
                                                     undefined);
   checker.Then();
 
   HObjectAccess access = HObjectAccess::ForAllocationSiteOffset(
       AllocationSite::kTransitionInfoOffset);
   HInstruction* boilerplate =
       Add<HLoadNamedField>(allocation_site, nullptr, access);
   HValue* elements = AddLoadElements(boilerplate);
@@ skipping 40 matching lines @@
 
 Handle<Code> FastCloneShallowArrayStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
 template <>
 HValue* CodeStubGraphBuilder<FastCloneShallowObjectStub>::BuildCodeStub() {
   HValue* undefined = graph()->GetConstantUndefined();
 
-  HInstruction* allocation_site =
-      Add<HLoadKeyed>(GetParameter(0), GetParameter(1), nullptr, FAST_ELEMENTS);
+  HInstruction* allocation_site = Add<HLoadKeyed>(
+      GetParameter(0), GetParameter(1), nullptr, FAST_ELEMENTS,
+      NEVER_RETURN_HOLE, LiteralsArray::kOffsetToFirstLiteral - kHeapObjectTag);
 
   IfBuilder checker(this);
   checker.IfNot<HCompareObjectEqAndBranch, HValue*>(allocation_site,
                                                     undefined);
   checker.And();
 
   HObjectAccess access = HObjectAccess::ForAllocationSiteOffset(
       AllocationSite::kTransitionInfoOffset);
   HInstruction* boilerplate =
       Add<HLoadNamedField>(allocation_site, nullptr, access);
@@ skipping 1831 matching lines @@
   return Pop();
 }
 
 
 Handle<Code> KeyedLoadGenericStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 }  // namespace internal
 }  // namespace v8