Towards removing dependency from generic lowering on compilation info.

src/compiler/js-context-specialization.h

Index: src/compiler/js-context-specialization.h
diff --git a/src/compiler/js-context-specialization.h b/src/compiler/js-context-specialization.h
index b8b50ed6c36a1dbbf0f2a575892e8328c4500f36..3893399fdcbce53d56f6449c2f72e114c7e1e594 100644
--- a/src/compiler/js-context-specialization.h
+++ b/src/compiler/js-context-specialization.h
@@ -19,13 +19,18 @@ namespace compiler {
 class JSContextSpecializer {

[titzer, 2014/08/20 12:54:38]

This class is becoming more general now. I think we should rename this to
JSContextAccessBuilder or something similar.

  public:
   JSContextSpecializer(CompilationInfo* info, JSGraph* jsgraph, Node* context)
-      : info_(info), jsgraph_(jsgraph), context_(context) {}
+      : specialized_(false),

[titzer, 2014/08/20 12:54:38]

If you make this a parameter, then you can simplify the pipeline a bit. It can
just always call SpecializeToContext(), which will be a no-op if the specializer
is not figured to do specialization.

+        info_(info),
+        jsgraph_(jsgraph),
+        context_(context) {}
 
   void SpecializeToContext();
   Reduction ReduceJSLoadContext(Node* node);
   Reduction ReduceJSStoreContext(Node* node);
+  Node* InsertBuiltinLoadBefore(Node* before, Builtins::JavaScript id);
 
  private:
+  bool specialized_;
   CompilationInfo* info_;
   JSGraph* jsgraph_;
   Node* context_;