Loads and stores to global vars are now made via property cell shortcuts installed into parent scri…

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index c06c6c1fe498b1a9daf9314017a54d0dcf89f659..b594ff4c2eb0147b624c0831bfb3780dea8d0b4d 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -78,6 +78,7 @@ namespace internal {
   V(InternalArrayNoArgumentConstructor)     \
   V(InternalArraySingleArgumentConstructor) \
   V(KeyedLoadGeneric)                       \
+  V(LoadGlobalViaContext)                   \
   V(LoadScriptContextField)                 \
   V(LoadDictionaryElement)                  \
   V(NameDictionaryLookup)                   \
@@ -85,6 +86,7 @@ namespace internal {
   V(Typeof)                                 \
   V(RegExpConstructResult)                  \
   V(StoreFastElement)                       \
+  V(StoreGlobalViaContext)                  \
   V(StoreScriptContextField)                \
   V(StringAdd)                              \
   V(ToBoolean)                              \
@@ -1341,6 +1343,60 @@ class StoreGlobalStub : public HandlerStub {
 };
 
 
+class LoadGlobalViaContextStub : public HydrogenCodeStub {
+ public:
+  // Use the loop version for depths higher than this one.
+  static const int kDynamicDepth = 7;
+
+  LoadGlobalViaContextStub(Isolate* isolate, int depth)
+      : HydrogenCodeStub(isolate) {
+    if (depth > kDynamicDepth) depth = kDynamicDepth;
+    set_sub_minor_key(DepthBits::encode(depth));
+  }
+
+  int depth() const { return DepthBits::decode(sub_minor_key()); }
+
+ private:
+  class DepthBits : public BitField<unsigned int, 0, 3> {};
+  STATIC_ASSERT(kDynamicDepth <= DepthBits::kMax);
+
+  DEFINE_CALL_INTERFACE_DESCRIPTOR(LoadGlobalViaContext);
+  DEFINE_HYDROGEN_CODE_STUB(LoadGlobalViaContext, HydrogenCodeStub);
+};
+
+
+class StoreGlobalViaContextStub : public HydrogenCodeStub {
+ public:
+  // Use the loop version for depths higher than this one.
+  static const int kDynamicDepth = 7;
+
+  StoreGlobalViaContextStub(Isolate* isolate, int depth,
+                            LanguageMode language_mode)
+      : HydrogenCodeStub(isolate) {
+    if (depth > kDynamicDepth) depth = kDynamicDepth;
+    set_sub_minor_key(DepthBits::encode(depth) |
+                      LanguageModeBits::encode(language_mode));
+  }
+
+  int depth() const { return DepthBits::decode(sub_minor_key()); }
+
+  LanguageMode language_mode() const {
+    return LanguageModeBits::decode(sub_minor_key());
+  }
+
+ private:
+  class DepthBits : public BitField<unsigned int, 0, 4> {};
+  STATIC_ASSERT(kDynamicDepth <= DepthBits::kMax);
+
+  class LanguageModeBits : public BitField<LanguageMode, 4, 2> {};
+  STATIC_ASSERT(LANGUAGE_END == 3);
+
+ private:
+  DEFINE_CALL_INTERFACE_DESCRIPTOR(StoreGlobalViaContext);
+  DEFINE_HYDROGEN_CODE_STUB(StoreGlobalViaContext, HydrogenCodeStub);
+};
+
+
 class CallApiFunctionStub : public PlatformCodeStub {
  public:
   explicit CallApiFunctionStub(Isolate* isolate, bool call_data_undefined)