Migrate FastCloneShallowObjectStub to TurboFan

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/crankshaft/hydrogen.h"
 #include "src/crankshaft/lithium.h"
 #include "src/field-index.h"
@@ skipping 552 matching lines @@
   return environment()->Pop();
 }
 
 
 Handle<Code> FastCloneShallowArrayStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
 template <>
-HValue* CodeStubGraphBuilder<FastCloneShallowObjectStub>::BuildCodeStub() {
-  HValue* undefined = graph()->GetConstantUndefined();
-  HValue* closure = GetParameter(0);
-  HValue* literal_index = GetParameter(1);
-
-  HValue* literals_array = Add<HLoadNamedField>(
-      closure, nullptr, HObjectAccess::ForLiteralsPointer());
-
-  HInstruction* allocation_site = Add<HLoadKeyed>(
-      literals_array, literal_index, nullptr, 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);
-
-  int length = casted_stub()->length();
-  if (length == 0) {
-    // Empty objects have some slack added to them.
-    length = JSObject::kInitialGlobalObjectUnusedPropertiesCount;
-  }
-  int size = JSObject::kHeaderSize + length * kPointerSize;
-  int object_size = size;
-  if (FLAG_allocation_site_pretenuring) {
-    size += AllocationMemento::kSize;
-  }
-
-  HValue* boilerplate_map =
-      Add<HLoadNamedField>(boilerplate, nullptr, HObjectAccess::ForMap());
-  HValue* boilerplate_size = Add<HLoadNamedField>(
-      boilerplate_map, nullptr, HObjectAccess::ForMapInstanceSize());
-  HValue* size_in_words = Add<HConstant>(object_size >> kPointerSizeLog2);
-  checker.If<HCompareNumericAndBranch>(boilerplate_size,
-                                       size_in_words, Token::EQ);
-  checker.Then();
-
-  HValue* size_in_bytes = Add<HConstant>(size);
-
-  HInstruction* object = Add<HAllocate>(size_in_bytes, HType::JSObject(),
-      NOT_TENURED, JS_OBJECT_TYPE);
-
-  for (int i = 0; i < object_size; i += kPointerSize) {
-    HObjectAccess access = HObjectAccess::ForObservableJSObjectOffset(i);
-    Add<HStoreNamedField>(object, access,
-                          Add<HLoadNamedField>(boilerplate, nullptr, access));
-  }
-
-  DCHECK(FLAG_allocation_site_pretenuring || (size == object_size));
-  if (FLAG_allocation_site_pretenuring) {
-    BuildCreateAllocationMemento(
-        object, Add<HConstant>(object_size), allocation_site);
-  }
-
-  environment()->Push(object);
-  checker.ElseDeopt(Deoptimizer::kUninitializedBoilerplateInFastClone);
-  checker.End();
-
-  return environment()->Pop();
-}
-
-
-Handle<Code> FastCloneShallowObjectStub::GenerateCode() {
-  return DoGenerateCode(this);
-}
-
-
-template <>
 HValue* CodeStubGraphBuilder<CreateAllocationSiteStub>::BuildCodeStub() {
   // This stub is performance sensitive, the generated code must be tuned
   // so that it doesn't build an eager frame.
   info()->MarkMustNotHaveEagerFrame();
 
   HValue* size = Add<HConstant>(AllocationSite::kSize);
   HInstruction* object = Add<HAllocate>(size, HType::JSObject(), TENURED,
       JS_OBJECT_TYPE);
 
   // Store the map
@@ skipping 1912 matching lines @@
   return Pop();
 }
 
 
 Handle<Code> KeyedLoadGenericStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 }  // namespace internal
 }  // namespace v8