Revert 15635: Turn ElementsTransitionAndStore stub into a HydrogenCodeStub

src/code-stubs-hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 890 matching lines @@
   }
   return value;
 }
 
 
 Handle<Code> StoreGlobalStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
-template<>
-HValue* CodeStubGraphBuilder<ElementsTransitionAndStoreStub>::BuildCodeStub() {
-  ElementsTransitionAndStoreStub* stub = casted_stub();
-  ElementsKind from_kind = stub->from();
-  ElementsKind to_kind = stub->to();
-
-  HValue* value = GetParameter(0);
-  HValue* target_map = GetParameter(1);
-  HValue* key = GetParameter(2);
-  HValue* object = GetParameter(3);
-
-  if (FLAG_trace_elements_transitions) {
-    // Tracing elements transitions is the job of the runtime.
-    current_block()->FinishExitWithDeoptimization(HDeoptimize::kUseAll);
-    set_current_block(NULL);
-    return value;
-  }
-
-  info()->MarkAsSavesCallerDoubles();
-
-  if (AllocationSite::GetMode(from_kind, to_kind) == TRACK_ALLOCATION_SITE) {
-    Add<HTrapAllocationMemento>(object);
-  }
-
-  // Check if we need to transition the array elements first
-  // (either SMI -> Double or Double -> Object).
-  if (DoesTransitionChangeElementsBufferFormat(from_kind, to_kind)) {
-    HInstruction* array_length = NULL;
-    if (stub->is_jsarray()) {
-      array_length = AddLoad(object, HObjectAccess::ForArrayLength());
-    } else {
-      array_length = AddLoadFixedArrayLength(AddLoadElements(object));
-    }
-    array_length->set_type(HType::Smi());
-
-    IfBuilder if_builder(this);
-
-    // Check if we have any elements.
-    if_builder.IfNot<HCompareNumericAndBranch>(array_length,
-                                               graph()->GetConstant0(),
-                                               Token::EQ);
-    if_builder.Then();
-
-    HInstruction* elements = AddLoadElements(object);
-
-    HInstruction* elements_length = AddLoadFixedArrayLength(elements);
-
-    BuildGrowElementsCapacity(object, elements, from_kind, to_kind,
-                              array_length, elements_length);
-
-    if_builder.End();
-  }
-
-  // Set transitioned map.
-  AddStore(object, HObjectAccess::ForMap(), target_map);
-
-  // Generate the actual store.
-  BuildUncheckedMonomorphicElementAccess(object, key, value, NULL,
-                                          stub->is_jsarray(), to_kind,
-                                          true, ALLOW_RETURN_HOLE,
-                                          stub->store_mode());
-
-  return value;
-}
-
-
-Handle<Code> ElementsTransitionAndStoreStub::GenerateCode() {
-  return DoGenerateCode(this);
-}
-
-
 } }  // namespace v8::internal