new classes: implement new.target passing to superclass constructor.

src/code-stubs.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_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 1572 matching lines @@
 
 class ArgumentsAccessStub: public PlatformCodeStub {
  public:
   enum Type {
     READ_ELEMENT,
     NEW_SLOPPY_FAST,
     NEW_SLOPPY_SLOW,
     NEW_STRICT
   };
 
-  ArgumentsAccessStub(Isolate* isolate, Type type) : PlatformCodeStub(isolate) {
-    minor_key_ = TypeBits::encode(type);
+  enum HasNewTarget { NO_NEW_TARGET, HAS_NEW_TARGET };
+
+  ArgumentsAccessStub(Isolate* isolate, Type type,
+                      HasNewTarget has_new_target = NO_NEW_TARGET)
+      : PlatformCodeStub(isolate) {
+    minor_key_ =
+        TypeBits::encode(type) | HasNewTargetBits::encode(has_new_target);
   }
 
   CallInterfaceDescriptor GetCallInterfaceDescriptor() OVERRIDE {
     if (type() == READ_ELEMENT) {
       return ArgumentsAccessReadDescriptor(isolate());
     }
     return ContextOnlyDescriptor(isolate());
   }
 
  private:
   Type type() const { return TypeBits::decode(minor_key_); }
+  bool has_new_target() const {
+    return HasNewTargetBits::decode(minor_key_) == HAS_NEW_TARGET;
+  }
 
   void GenerateReadElement(MacroAssembler* masm);
   void GenerateNewStrict(MacroAssembler* masm);
   void GenerateNewSloppyFast(MacroAssembler* masm);
   void GenerateNewSloppySlow(MacroAssembler* masm);
 
   void PrintName(std::ostream& os) const OVERRIDE;  // NOLINT
 
   class TypeBits : public BitField<Type, 0, 2> {};
+  class HasNewTargetBits : public BitField<HasNewTarget, 2, 1> {};
 
   DEFINE_PLATFORM_CODE_STUB(ArgumentsAccess, PlatformCodeStub);
 };
 
 
 class RegExpExecStub: public PlatformCodeStub {
  public:
   explicit RegExpExecStub(Isolate* isolate) : PlatformCodeStub(isolate) { }
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(ContextOnly);
@@ skipping 61 matching lines @@
     code->set_has_function_cache(RecordCallTarget());
   }
 
  private:
   CallConstructorFlags flags() const { return FlagBits::decode(minor_key_); }
 
   bool RecordCallTarget() const {
     return (flags() & RECORD_CONSTRUCTOR_TARGET) != 0;
   }
 
+  bool IsSuperConstructorCall() const {
+    return (flags() & SUPER_CONSTRUCTOR_CALL) != 0;
+  }
+
   void PrintName(std::ostream& os) const OVERRIDE;  // NOLINT
 
-  class FlagBits : public BitField<CallConstructorFlags, 0, 1> {};
+  class FlagBits : public BitField<CallConstructorFlags, 0, 2> {};
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(CallConstruct);
   DEFINE_PLATFORM_CODE_STUB(CallConstruct, PlatformCodeStub);
 };
 
 
 enum StringIndexFlags {
   // Accepts smis or heap numbers.
   STRING_INDEX_IS_NUMBER,
 
@@ skipping 968 matching lines @@
 
 #undef DEFINE_CALL_INTERFACE_DESCRIPTOR
 #undef DEFINE_PLATFORM_CODE_STUB
 #undef DEFINE_HANDLER_CODE_STUB
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_