Make the array bounds check elimination phase optional (and set the foundation for introducing SSI …

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 22 matching lines @@
 
 namespace v8 {
 namespace internal {
 
 
 Handle<Code> HydrogenCodeStub::CodeFromGraph(HGraph* graph) {
   graph->OrderBlocks();
   graph->AssignDominators();
   graph->CollectPhis();
   graph->InsertRepresentationChanges();
-  graph->EliminateRedundantBoundsChecks();
+  graph->ApplyActualValues();
   LChunk* chunk = LChunk::NewChunk(graph);
   ASSERT(chunk != NULL);
   Handle<Code> stub = chunk->Codegen(Code::COMPILED_STUB);
   return stub;
 }
 
 
 class CodeStubGraphBuilderBase : public HGraphBuilder {
  public:
   CodeStubGraphBuilderBase(Isolate* isolate, HydrogenCodeStub* stub)
@@ skipping 62 matching lines @@
   Stub* casted_stub() { return static_cast<Stub*>(stub()); }
 };
 
 
 template <>
 void CodeStubGraphBuilder<KeyedLoadFastElementStub>::BuildCodeStub() {
   Zone* zone = this->zone();
 
   HInstruction* load = BuildUncheckedMonomorphicElementAccess(
       GetParameter(0), GetParameter(1), NULL, NULL,
-      casted_stub()->is_js_array(), casted_stub()->elements_kind(), false);
+      casted_stub()->is_js_array(), casted_stub()->elements_kind(),
+      false, Representation::Tagged());
   AddInstruction(load);
 
   HReturn* ret = new(zone) HReturn(load, context());
   current_block()->Finish(ret);
 }
 
 
 Handle<Code> KeyedLoadFastElementStub::GenerateCode() {
   CodeStubGraphBuilder<KeyedLoadFastElementStub> builder(this);
   return CodeFromGraph(builder.CreateGraph());
 }
 
 
 } }  // namespace v8::internal