[turbofan] [deoptimizer] Support inlining of ES6 tail calls.

src/deoptimizer.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_DEOPTIMIZER_H_
 #define V8_DEOPTIMIZER_H_
 
 #include "src/allocation.h"
 #include "src/macro-assembler.h"
 
@@ skipping 98 matching lines @@
 };
 
 
 class TranslatedFrame {
  public:
   enum Kind {
     kFunction,
     kInterpretedFunction,
     kGetter,
     kSetter,
+    kTailCallerFunction,
     kArgumentsAdaptor,
     kConstructStub,
     kCompiledStub,
     kInvalid
   };
 
   int GetValueCount();
 
   Kind kind() const { return kind_; }
   BailoutId node_id() const { return node_id_; }
@@ skipping 50 matching lines @@
   // Constructor static methods.
   static TranslatedFrame JSFrame(BailoutId node_id,
                                  SharedFunctionInfo* shared_info, int height);
   static TranslatedFrame InterpretedFrame(BailoutId bytecode_offset,
                                           SharedFunctionInfo* shared_info,
                                           int height);
   static TranslatedFrame AccessorFrame(Kind kind,
                                        SharedFunctionInfo* shared_info);
   static TranslatedFrame ArgumentsAdaptorFrame(SharedFunctionInfo* shared_info,
                                                int height);
+  static TranslatedFrame JSTailCallerFrame(SharedFunctionInfo* shared_info);
   static TranslatedFrame ConstructStubFrame(SharedFunctionInfo* shared_info,
                                             int height);
   static TranslatedFrame CompiledStubFrame(int height, Isolate* isolate) {
     return TranslatedFrame(kCompiledStub, isolate, nullptr, height);
   }
   static TranslatedFrame InvalidFrame() {
     return TranslatedFrame(kInvalid, nullptr);
   }
 
   static void AdvanceIterator(std::deque<TranslatedValue>::iterator* iter);
@@ skipping 323 matching lines @@
                            BailoutId node_id,
                            SharedFunctionInfo* shared);
 
   // Code generation support.
   static int input_offset() { return OFFSET_OF(Deoptimizer, input_); }
   static int output_count_offset() {
     return OFFSET_OF(Deoptimizer, output_count_);
   }
   static int output_offset() { return OFFSET_OF(Deoptimizer, output_); }
 
+  static int caller_frame_top_offset() {
+    return OFFSET_OF(Deoptimizer, caller_frame_top_);
+  }
+
   static int GetDeoptimizedCodeCount(Isolate* isolate);
 
   static const int kNotDeoptimizationEntry = -1;
 
   // Generators for the deoptimization entry code.
   class TableEntryGenerator BASE_EMBEDDED {
    public:
     TableEntryGenerator(MacroAssembler* masm, BailoutType type, int count)
         : masm_(masm), type_(type), count_(count) {}
 
@@ skipping 33 matching lines @@
               BailoutType type,
               unsigned bailout_id,
               Address from,
               int fp_to_sp_delta,
               Code* optimized_code);
   Code* FindOptimizedCode(JSFunction* function, Code* optimized_code);
   void PrintFunctionName();
   void DeleteFrameDescriptions();
 
   void DoComputeOutputFrames();
-  void DoComputeJSFrame(int frame_index, bool goto_catch_handler);
-  void DoComputeInterpretedFrame(int frame_index, bool goto_catch_handler);
-  void DoComputeArgumentsAdaptorFrame(int frame_index);
-  void DoComputeConstructStubFrame(int frame_index);
-  void DoComputeAccessorStubFrame(int frame_index, bool is_setter_stub_frame);
-  void DoComputeCompiledStubFrame(int frame_index);
+  void DoComputeJSFrame(TranslatedFrame* translated_frame, int frame_index,
+                        bool goto_catch_handler);
+  void DoComputeInterpretedFrame(TranslatedFrame* translated_frame,
+                                 int frame_index, bool goto_catch_handler);
+  void DoComputeArgumentsAdaptorFrame(TranslatedFrame* translated_frame,
+                                      int frame_index);
+  void DoComputeTailCallerFrame(TranslatedFrame* translated_frame,
+                                int frame_index);
+  void DoComputeConstructStubFrame(TranslatedFrame* translated_frame,
+                                   int frame_index);
+  void DoComputeAccessorStubFrame(TranslatedFrame* translated_frame,
+                                  int frame_index, bool is_setter_stub_frame);
+  void DoComputeCompiledStubFrame(TranslatedFrame* translated_frame,
+                                  int frame_index);
 
   void WriteTranslatedValueToOutput(
       TranslatedFrame::iterator* iterator, int* input_index, int frame_index,
       unsigned output_offset, const char* debug_hint_string = nullptr,
       Address output_address_for_materialization = nullptr);
   void WriteValueToOutput(Object* value, int input_index, int frame_index,
                           unsigned output_offset,
                           const char* debug_hint_string);
   void DebugPrintOutputSlot(intptr_t value, int frame_index,
                             unsigned output_offset,
@@ skipping 327 matching lines @@
 };
 
 #define TRANSLATION_OPCODE_LIST(V) \
   V(BEGIN)                         \
   V(JS_FRAME)                      \
   V(INTERPRETED_FRAME)             \
   V(CONSTRUCT_STUB_FRAME)          \
   V(GETTER_STUB_FRAME)             \
   V(SETTER_STUB_FRAME)             \
   V(ARGUMENTS_ADAPTOR_FRAME)       \
+  V(JS_TAIL_CALLER_FRAME)          \

[Michael Starzinger, 2016/03/08 16:25:08]

nit: Can we call this "TAIL_CALLER_FRAME" without the JS prefix? For symmetry
and also because it is just a marker frame without JS semantics.

[Igor Sheludko, 2016/03/08 18:03:40]

Done.

   V(COMPILED_STUB_FRAME)           \
   V(DUPLICATED_OBJECT)             \
   V(ARGUMENTS_OBJECT)              \
   V(CAPTURED_OBJECT)               \
   V(REGISTER)                      \
   V(INT32_REGISTER)                \
   V(UINT32_REGISTER)               \
   V(BOOL_REGISTER)                 \
   V(DOUBLE_REGISTER)               \
   V(STACK_SLOT)                    \
@@ skipping 23 matching lines @@
   }
 
   int index() const { return index_; }
 
   // Commands.
   void BeginJSFrame(BailoutId node_id, int literal_id, unsigned height);
   void BeginInterpretedFrame(BailoutId bytecode_offset, int literal_id,
                              unsigned height);
   void BeginCompiledStubFrame(int height);
   void BeginArgumentsAdaptorFrame(int literal_id, unsigned height);
+  void BeginTailCallerFrame(int literal_id);
   void BeginConstructStubFrame(int literal_id, unsigned height);
   void BeginGetterStubFrame(int literal_id);
   void BeginSetterStubFrame(int literal_id);
   void BeginArgumentsObject(int args_length);
   void BeginCapturedObject(int length);
   void DuplicateObject(int object_index);
   void StoreRegister(Register reg);
   void StoreInt32Register(Register reg);
   void StoreUint32Register(Register reg);
   void StoreBoolRegister(Register reg);
@@ skipping 108 matching lines @@
   std::vector<Handle<Object> > expression_stack_;
   int source_position_;
 
   friend class Deoptimizer;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_DEOPTIMIZER_H_