Generalize AllocationSite field access in HObjectAccess.

There are simply becoming too many individual field accessors, and
more are coming.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/43563002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17408 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/code-stubs-hydrogen.cc

@@ -371,7 +371,8 @@ HValue* CodeStubGraphBuilder<FastCloneShallowArrayStub>::BuildCodeStub() {
                                                     undefined);
   checker.Then();
 
-  HObjectAccess access = HObjectAccess::ForAllocationSiteTransitionInfo();
+  HObjectAccess access = HObjectAccess::ForAllocationSiteOffset(
+      AllocationSite::kTransitionInfoOffset);
   HInstruction* boilerplate = Add<HLoadNamedField>(allocation_site, access);
   HValue* push_value;
   if (mode == FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS) {
@@ -440,7 +441,8 @@ HValue* CodeStubGraphBuilder<FastCloneShallowObjectStub>::BuildCodeStub() {
                                                     undefined);
   checker.And();
 
-  HObjectAccess access = HObjectAccess::ForAllocationSiteTransitionInfo();
+  HObjectAccess access = HObjectAccess::ForAllocationSiteOffset(
+      AllocationSite::kTransitionInfoOffset);
   HInstruction* boilerplate = Add<HLoadNamedField>(allocation_site, access);
 
   int size = JSObject::kHeaderSize + casted_stub()->length() * kPointerSize;
@@ -500,12 +502,14 @@ HValue* CodeStubGraphBuilder<CreateAllocationSiteStub>::BuildCodeStub() {
   // Store the payload (smi elements kind)
   HValue* initial_elements_kind = Add<HConstant>(GetInitialFastElementsKind());
   Add<HStoreNamedField>(object,
-                        HObjectAccess::ForAllocationSiteTransitionInfo(),
+                        HObjectAccess::ForAllocationSiteOffset(
+                            AllocationSite::kTransitionInfoOffset),
                         initial_elements_kind);
 
   // Unlike literals, constructed arrays don't have nested sites
   Add<HStoreNamedField>(object,
-                        HObjectAccess::ForAllocationSiteNestedSite(),
+                        HObjectAccess::ForAllocationSiteOffset(
+                            AllocationSite::kNestedSiteOffset),
                         graph()->GetConstant0());
 
   // Store an empty fixed array for the code dependency.
@@ -513,7 +517,8 @@ HValue* CodeStubGraphBuilder<CreateAllocationSiteStub>::BuildCodeStub() {
     Add<HConstant>(isolate()->factory()->empty_fixed_array());
   HStoreNamedField* store = Add<HStoreNamedField>(
       object,
-      HObjectAccess::ForAllocationSiteDependentCode(),
+      HObjectAccess::ForAllocationSiteOffset(
+          AllocationSite::kDependentCodeOffset),
       empty_fixed_array);
 
   // Link the object to the allocation site list
@@ -522,8 +527,8 @@ HValue* CodeStubGraphBuilder<CreateAllocationSiteStub>::BuildCodeStub() {
   HValue* site = Add<HLoadNamedField>(site_list,
                                       HObjectAccess::ForAllocationSiteList());
   store = Add<HStoreNamedField>(object,
-                                HObjectAccess::ForAllocationSiteWeakNext(),
-                                site);
+      HObjectAccess::ForAllocationSiteOffset(AllocationSite::kWeakNextOffset),
+      site);
   store->SkipWriteBarrier();
   Add<HStoreNamedField>(site_list, HObjectAccess::ForAllocationSiteList(),
                         object);

src/hydrogen-instructions.h

@@ -5786,20 +5786,9 @@ class HObjectAccess V8_FINAL {
                 ? Representation::Smi() : Representation::Tagged());
   }
 
-  static HObjectAccess ForAllocationSiteTransitionInfo() {
-    return HObjectAccess(kInobject, AllocationSite::kTransitionInfoOffset);
-  }
-
-  static HObjectAccess ForAllocationSiteNestedSite() {
-    return HObjectAccess(kInobject, AllocationSite::kNestedSiteOffset);
-  }
-
-  static HObjectAccess ForAllocationSiteDependentCode() {
-    return HObjectAccess(kInobject, AllocationSite::kDependentCodeOffset);
-  }
-
-  static HObjectAccess ForAllocationSiteWeakNext() {
-    return HObjectAccess(kInobject, AllocationSite::kWeakNextOffset);
+  static HObjectAccess ForAllocationSiteOffset(int offset) {
+    ASSERT(offset >= HeapObject::kHeaderSize && offset < AllocationSite::kSize);
+    return HObjectAccess(kInobject, offset);
   }
 
   static HObjectAccess ForAllocationSiteList() {