Tweak the TurboFan pipeline for stub compilation.

src/hydrogen.h

 // 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.
 
 #ifndef V8_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 2213 matching lines @@
   F(MapInitialize)                     \
   F(MapSet)                            \
   F(SetAdd)                            \
   F(SetClear)                          \
   F(SetDelete)                         \
   F(SetGetSize)                        \
   F(SetHas)                            \
   F(SetInitialize)                     \
   /* Arrays */                         \
   F(HasFastPackedElements)             \
-  F(GetPrototype)
+  F(GetPrototype)                      \
+  /* Strings */                        \
+  F(StringLength)                      \
+  /* JSValue */                        \

[titzer, 2015/03/18 09:25:53]

We need a better name for this operation.

+  F(JSValueValue)
 
 #define GENERATOR_DECLARATION(Name) void Generate##Name(CallRuntime* call);
   FOR_EACH_HYDROGEN_INTRINSIC(GENERATOR_DECLARATION)
 #undef GENERATOR_DECLARATION
 
   void VisitDelete(UnaryOperation* expr);
   void VisitVoid(UnaryOperation* expr);
   void VisitTypeof(UnaryOperation* expr);
   void VisitNot(UnaryOperation* expr);
 
@@ skipping 781 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_