Crankshaft part of the 'loads and stores to global vars through property cell shortcuts' feature.

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index e5e2b26bd39c0f910d45c865b804cbeafe398c80..95d56beb2c62bc499f49746ef6b2bb1a7bff9c9a 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -102,6 +102,7 @@ class LCodeGen;
   V(LoadFieldByIndex)                        \
   V(LoadFunctionPrototype)                   \
   V(LoadGlobalGeneric)                       \
+  V(LoadGlobalViaContext)                    \
   V(LoadKeyed)                               \
   V(LoadKeyedGeneric)                        \
   V(LoadNamedField)                          \
@@ -141,6 +142,7 @@ class LCodeGen;
   V(StoreCodeEntry)                          \
   V(StoreContextSlot)                        \
   V(StoreFrameContext)                       \
+  V(StoreGlobalViaContext)                   \
   V(StoreKeyed)                              \
   V(StoreKeyedGeneric)                       \
   V(StoreNamedField)                         \
@@ -1694,6 +1696,23 @@ class LLoadGlobalGeneric final : public LTemplateInstruction<1, 2, 1> {
 };
 
 
+class LLoadGlobalViaContext final : public LTemplateInstruction<1, 1, 1> {
+ public:
+  explicit LLoadGlobalViaContext(LOperand* context) { inputs_[0] = context; }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadGlobalViaContext, "load-global-via-context")
+  DECLARE_HYDROGEN_ACCESSOR(LoadGlobalViaContext)
+
+  void PrintDataTo(StringStream* stream) override;
+
+  LOperand* context() { return inputs_[0]; }
+
+  Handle<Object> name() const { return hydrogen()->name(); }
+  int depth() const { return hydrogen()->depth(); }
+  int slot_index() const { return hydrogen()->slot_index(); }
+};
+
+
 class LLoadContextSlot final : public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LLoadContextSlot(LOperand* context) {
@@ -2185,6 +2204,29 @@ class LStoreNamedGeneric final : public LTemplateInstruction<0, 3, 2> {
 };
 
 
+class LStoreGlobalViaContext final : public LTemplateInstruction<0, 2, 0> {
+ public:
+  LStoreGlobalViaContext(LOperand* context, LOperand* value) {
+    inputs_[0] = context;
+    inputs_[1] = value;
+  }
+
+  LOperand* context() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StoreGlobalViaContext,
+                               "store-global-via-context")
+  DECLARE_HYDROGEN_ACCESSOR(StoreGlobalViaContext)
+
+  void PrintDataTo(StringStream* stream) override;
+
+  Handle<Object> name() const { return hydrogen()->name(); }
+  int depth() { return hydrogen()->depth(); }
+  int slot_index() { return hydrogen()->slot_index(); }
+  LanguageMode language_mode() { return hydrogen()->language_mode(); }
+};
+
+
 class LStoreKeyed final : public LTemplateInstruction<0, 3, 0> {
  public:
   LStoreKeyed(LOperand* object, LOperand* key, LOperand* value) {