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

src/hydrogen-instructions.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_INSTRUCTIONS_H_
 #define V8_HYDROGEN_INSTRUCTIONS_H_
 
 #include <cstring>
 #include <iosfwd>
 
@@ skipping 101 matching lines @@
   V(IsConstructCallAndBranch)                 \
   V(IsObjectAndBranch)                        \
   V(IsStringAndBranch)                        \
   V(IsSmiAndBranch)                           \
   V(IsUndetectableAndBranch)                  \
   V(LeaveInlined)                             \
   V(LoadContextSlot)                          \
   V(LoadFieldByIndex)                         \
   V(LoadFunctionPrototype)                    \
   V(LoadGlobalGeneric)                        \
+  V(LoadGlobalViaContext)                     \
   V(LoadKeyed)                                \
   V(LoadKeyedGeneric)                         \
   V(LoadNamedField)                           \
   V(LoadNamedGeneric)                         \
   V(LoadRoot)                                 \
   V(MapEnumLength)                            \
   V(MathFloorOfDiv)                           \
   V(MathMinMax)                               \
   V(MaybeGrowElements)                        \
   V(Mod)                                      \
   V(Mul)                                      \
   V(OsrEntry)                                 \
   V(Parameter)                                \
   V(Power)                                    \
   V(PushArguments)                            \
   V(RegExpLiteral)                            \
   V(Return)                                   \
   V(Ror)                                      \
   V(Sar)                                      \
   V(SeqStringGetChar)                         \
   V(SeqStringSetChar)                         \
   V(Shl)                                      \
   V(Shr)                                      \
   V(Simulate)                                 \
   V(StackCheck)                               \
   V(StoreCodeEntry)                           \
   V(StoreContextSlot)                         \
   V(StoreFrameContext)                        \
+  V(StoreGlobalViaContext)                    \
   V(StoreKeyed)                               \
   V(StoreKeyedGeneric)                        \
   V(StoreNamedField)                          \
   V(StoreNamedGeneric)                        \
   V(StringAdd)                                \
   V(StringCharCodeAt)                         \
   V(StringCharFromCode)                       \
   V(StringCompareAndBranch)                   \
   V(Sub)                                      \
   V(ThisFunction)                             \
@@ skipping 5278 matching lines @@
     SetAllSideEffects();
   }
 
   Handle<String> name_;
   TypeofMode typeof_mode_;
   Handle<TypeFeedbackVector> feedback_vector_;
   FeedbackVectorICSlot slot_;
 };
 
 
+class HLoadGlobalViaContext final : public HTemplateInstruction<1> {
+ public:
+  DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P3(HLoadGlobalViaContext,
+                                              Handle<String>, int, int);

[Jakob Kummerow, 2015/07/19 10:34:53]

s/Handle<String>/Handle<Name>/ here and below? Since HLoadGlobalGeneric uses
Strings too, it probably doesn't matter much.

[Igor Sheludko, 2015/07/20 08:42:00]

This operation is about writing to global via variables, which has only string
names. So it's ok.
Probably I should update name's type in HStoreGlobalViaContext to be
Handle<String> as well.

+
+  HValue* context() { return OperandAt(0); }
+  Handle<String> name() const { return name_; }
+  int depth() const { return depth_; }
+  int slot_index() const { return slot_index_; }
+
+  std::ostream& PrintDataTo(std::ostream& os) const override;  // NOLINT
+
+  Representation RequiredInputRepresentation(int index) override {
+    return Representation::Tagged();
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadGlobalViaContext)
+
+ private:
+  HLoadGlobalViaContext(HValue* context, Handle<String> name, int depth,
+                        int slot_index)
+      : name_(name), depth_(depth), slot_index_(slot_index) {
+    SetOperandAt(0, context);
+    set_representation(Representation::Tagged());
+    SetAllSideEffects();
+  }
+
+  Handle<String> name_;
+  int depth_;
+  int slot_index_;
+};
+
+
 class HAllocate final : public HTemplateInstruction<2> {
  public:
   static bool CompatibleInstanceTypes(InstanceType type1,
                                       InstanceType type2) {
     return ComputeFlags(TENURED, type1) == ComputeFlags(TENURED, type2) &&
         ComputeFlags(NOT_TENURED, type1) == ComputeFlags(NOT_TENURED, type2);
   }
 
   static HAllocate* New(
       Isolate* isolate, Zone* zone, HValue* context, HValue* size, HType type,
@@ skipping 1514 matching lines @@
   }
 
   Handle<Name> name_;
   Handle<TypeFeedbackVector> feedback_vector_;
   FeedbackVectorICSlot slot_;
   LanguageMode language_mode_;
   InlineCacheState initialization_state_;
 };
 
 
+class HStoreGlobalViaContext final : public HTemplateInstruction<2> {
+ public:
+  DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P5(HStoreGlobalViaContext,
+                                              Handle<Name>, HValue*, int, int,
+                                              LanguageMode);
+  HValue* context() const { return OperandAt(0); }
+  HValue* value() const { return OperandAt(1); }
+  Handle<Name> name() const { return name_; }
+  int depth() const { return depth_; }
+  int slot_index() const { return slot_index_; }
+  LanguageMode language_mode() const { return language_mode_; }
+
+  std::ostream& PrintDataTo(std::ostream& os) const override;  // NOLINT
+
+  Representation RequiredInputRepresentation(int index) override {
+    return Representation::Tagged();
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(StoreGlobalViaContext)
+
+ private:
+  HStoreGlobalViaContext(HValue* context, Handle<Name> name, HValue* value,
+                         int depth, int slot_index, LanguageMode language_mode)
+      : name_(name),
+        depth_(depth),
+        slot_index_(slot_index),
+        language_mode_(language_mode) {
+    SetOperandAt(0, context);
+    SetOperandAt(1, value);
+    SetAllSideEffects();
+  }
+
+  Handle<Name> name_;
+  int depth_;
+  int slot_index_;
+  LanguageMode language_mode_;
+};
+
+
 class HStoreKeyed final : public HTemplateInstruction<3>,
                           public ArrayInstructionInterface {
  public:
   DECLARE_INSTRUCTION_FACTORY_P4(HStoreKeyed, HValue*, HValue*, HValue*,
                                  ElementsKind);
   DECLARE_INSTRUCTION_FACTORY_P5(HStoreKeyed, HValue*, HValue*, HValue*,
                                  ElementsKind, StoreFieldOrKeyedMode);
   DECLARE_INSTRUCTION_FACTORY_P6(HStoreKeyed, HValue*, HValue*, HValue*,
                                  ElementsKind, StoreFieldOrKeyedMode, int);
 
@@ skipping 976 matching lines @@
 };
 
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_