[es6] Tail calls support.

src/crankshaft/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_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_
 #define V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_
 
 #include <cstring>
 #include <iosfwd>
 
@@ skipping 2377 matching lines @@
   }
 
   Handle<JSFunction> known_function_;
   int formal_parameter_count_;
   bool has_stack_check_;
 };
 
 
 class HCallFunction final : public HBinaryCall {
  public:
-  DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P3(HCallFunction, HValue*, int,
-                                              ConvertReceiverMode);
+  DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P4(HCallFunction, HValue*, int,
+                                              ConvertReceiverMode,
+                                              TailCallMode);
 
   HValue* context() const { return first(); }
   HValue* function() const { return second(); }
 
-  ConvertReceiverMode convert_mode() const { return convert_mode_; }
+  ConvertReceiverMode convert_mode() const {
+    return ConvertReceiverModeField::decode(bit_field_);
+  }
+  TailCallMode tail_call_mode() const {
+    return TailCallModeField::decode(bit_field_);
+  }
   FeedbackVectorSlot slot() const { return slot_; }
   Handle<TypeFeedbackVector> feedback_vector() const {
     return feedback_vector_;
   }
   bool HasVectorAndSlot() const { return !feedback_vector_.is_null(); }
   void SetVectorAndSlot(Handle<TypeFeedbackVector> vector,
                         FeedbackVectorSlot slot) {
     feedback_vector_ = vector;
     slot_ = slot;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(CallFunction)
 
   std::ostream& PrintDataTo(std::ostream& os) const override;  // NOLINT
 
   int argument_delta() const override { return -argument_count(); }
 
  private:
   HCallFunction(HValue* context, HValue* function, int argument_count,
-                ConvertReceiverMode convert_mode)
+                ConvertReceiverMode convert_mode, TailCallMode tail_call_mode)
       : HBinaryCall(context, function, argument_count),
-        convert_mode_(convert_mode) {}
+        bit_field_(ConvertReceiverModeField::encode(convert_mode) |
+                   TailCallModeField::encode(tail_call_mode)) {}
   Handle<TypeFeedbackVector> feedback_vector_;
   FeedbackVectorSlot slot_;
-  ConvertReceiverMode convert_mode_;
+
+  class ConvertReceiverModeField : public BitField<ConvertReceiverMode, 0, 2> {
+  };
+  class TailCallModeField
+      : public BitField<TailCallMode, ConvertReceiverModeField::kNext, 1> {};
+
+  uint32_t bit_field_;
 };
 
 
 class HCallNewArray final : public HBinaryCall {
  public:
   DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P4(HCallNewArray, HValue*, int,
                                               ElementsKind,
                                               Handle<AllocationSite>);
 
   HValue* context() { return first(); }
@@ skipping 5348 matching lines @@
 
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_