Hydrogenized KeyedLoadGeneric stub: when probing the KeyedLookupCache fails, call the runtime, don'…

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 2a899b921415dc0a9ca35fe86db5b960c1ac0af8..a49fef72007013a745049b5e387daad99e724684 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -1475,6 +1475,9 @@ class HGraphBuilder {
 
   class IfBuilder V8_FINAL {
    public:
+    // If using this constructor, Initialize() must be called explicitly!
+    IfBuilder();
+
     explicit IfBuilder(HGraphBuilder* builder);
     IfBuilder(HGraphBuilder* builder,
               HIfContinuation* continuation);
@@ -1483,6 +1486,8 @@ class HGraphBuilder {
       if (!finished_) End();
     }
 
+    void Initialize(HGraphBuilder* builder);
+
     template<class Condition>
     Condition* If(HValue *p) {
       Condition* compare = builder()->New<Condition>(p);
@@ -1625,9 +1630,14 @@ class HGraphBuilder {
     void Return(HValue* value);
 
    private:
+    void InitializeDontCreateBlocks(HGraphBuilder* builder);
+
     HControlInstruction* AddCompare(HControlInstruction* compare);
 
-    HGraphBuilder* builder() const { return builder_; }
+    HGraphBuilder* builder() const {
+      ASSERT(builder_ != NULL);  // Have you called "Initialize"?
+      return builder_;
+    }
 
     void AddMergeAtJoinBlock(bool deopt);