Tweak the TurboFan pipeline for stub compilation.

src/hydrogen.cc

 // Copyright 2013 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/hydrogen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 11697 matching lines @@
   {
     // If the object is not a value return the object.
     Push(object);
     Add<HSimulate>(call->id(), FIXED_SIMULATE);
   }
   if_objectisvalue.End();
   return ast_context()->ReturnValue(Pop());
 }
 
 
+void HOptimizedGraphBuilder::GenerateJSValueValue(CallRuntime* call) {
+  DCHECK(call->arguments()->length() == 1);
+  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
+  HValue* value = Pop();
+  HInstruction* result = Add<HLoadNamedField>(
+      value, nullptr,
+      HObjectAccess::ForObservableJSObjectOffset(JSValue::kValueOffset));
+  return ast_context()->ReturnInstruction(result, call->id());
+}
+
+
 void HOptimizedGraphBuilder::GenerateDateField(CallRuntime* call) {
   DCHECK(call->arguments()->length() == 2);
   DCHECK_NOT_NULL(call->arguments()->at(1)->AsLiteral());
   Smi* index = Smi::cast(*(call->arguments()->at(1)->AsLiteral()->value()));
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
   HValue* date = Pop();
   HDateField* result = New<HDateField>(date, index);
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
@@ skipping 141 matching lines @@
 // Fast support for StringCompare.
 void HOptimizedGraphBuilder::GenerateStringCompare(CallRuntime* call) {
   DCHECK_EQ(2, call->arguments()->length());
   CHECK_ALIVE(VisitExpressions(call->arguments()));
   PushArgumentsFromEnvironment(call->arguments()->length());
   HCallStub* result = New<HCallStub>(CodeStub::StringCompare, 2);
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
 
+void HOptimizedGraphBuilder::GenerateStringLength(CallRuntime* call) {
+  DCHECK(call->arguments()->length() == 1);
+  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
+  HValue* string = Pop();
+  HInstruction* result = AddLoadStringLength(string);
+  return ast_context()->ReturnInstruction(result, call->id());
+}
+
+
 // Support for direct calls from JavaScript to native RegExp code.
 void HOptimizedGraphBuilder::GenerateRegExpExec(CallRuntime* call) {
   DCHECK_EQ(4, call->arguments()->length());
   CHECK_ALIVE(VisitExpressions(call->arguments()));
   PushArgumentsFromEnvironment(call->arguments()->length());
   HCallStub* result = New<HCallStub>(CodeStub::RegExpExec, 4);
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
 
@@ skipping 1497 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal