Build fast literals in hydrogen.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index ad036871802b32b0ad9646e480fd43339444ce0f..5b1dd61795753d711be28a5a7b2392e5c043467e 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -111,7 +111,6 @@ class LChunkBuilder;
   V(DummyUse)                                  \
   V(ElementsKind)                              \
   V(EnterInlined)                              \
-  V(FastLiteral)                               \
   V(FixedArrayBaseLength)                      \
   V(ForceRepresentation)                       \
   V(FunctionLiteral)                           \
@@ -4955,7 +4954,6 @@ inline bool ReceiverObjectNeedsWriteBarrier(HValue* object,
         new_space_dominator);
   }
   if (object != new_space_dominator) return true;
-  if (object->IsFastLiteral()) return false;
   if (object->IsAllocateObject()) return false;
   if (object->IsAllocate()) {
     return !HAllocate::cast(object)->GuaranteedInNewSpace();
@@ -5966,45 +5964,6 @@ class HMaterializedLiteral: public HTemplateInstruction<V> {
 };
 
 
-class HFastLiteral: public HMaterializedLiteral<1> {
- public:
-  HFastLiteral(HValue* context,
-               Handle<JSObject> boilerplate,
-               int total_size,
-               int literal_index,
-               int depth,
-               AllocationSiteMode mode)
-      : HMaterializedLiteral<1>(literal_index, depth, mode),
-        boilerplate_(boilerplate),
-        total_size_(total_size) {
-    SetOperandAt(0, context);
-    SetGVNFlag(kChangesNewSpacePromotion);
-  }
-
-  // Maximum depth and total number of elements and properties for literal
-  // graphs to be considered for fast deep-copying.
-  static const int kMaxLiteralDepth = 3;
-  static const int kMaxLiteralProperties = 8;
-
-  HValue* context() { return OperandAt(0); }
-  Handle<JSObject> boilerplate() const { return boilerplate_; }
-  int total_size() const { return total_size_; }
-  virtual Representation RequiredInputRepresentation(int index) {
-    return Representation::Tagged();
-  }
-  virtual Handle<Map> GetMonomorphicJSObjectMap() {
-    return Handle<Map>(boilerplate()->map());
-  }
-  virtual HType CalculateInferredType();
-
-  DECLARE_CONCRETE_INSTRUCTION(FastLiteral)
-
- private:
-  Handle<JSObject> boilerplate_;
-  int total_size_;
-};
-
-
 class HArrayLiteral: public HMaterializedLiteral<1> {
  public:
   HArrayLiteral(HValue* context,
@@ -6192,7 +6151,7 @@ class HToFastProperties: public HUnaryOperation {
     // This instruction is not marked as having side effects, but
     // changes the map of the input operand. Use it only when creating
     // object literals.
-    ASSERT(value->IsObjectLiteral() || value->IsFastLiteral());
+    ASSERT(value->IsObjectLiteral());
     set_representation(Representation::Tagged());
   }