new classes: change semantics of super(...) call and add new.target to construct stub.

src/x64/code-stubs-x64.cc

 // Copyright 2013 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 1999 matching lines @@
                                 FixedArray::kHeaderSize));
       __ CompareRoot(FieldOperand(rbx, 0), Heap::kAllocationSiteMapRootIndex);
       __ j(equal, &feedback_register_initialized);
       __ LoadRoot(rbx, Heap::kUndefinedValueRootIndex);
       __ bind(&feedback_register_initialized);
     }
 
     __ AssertUndefinedOrAllocationSite(rbx);
   }
 
+  // Pass original constructor to construct stub.
+  __ movp(rdx, rdi);
+
   // Jump to the function-specific construct stub.
   Register jmp_reg = rcx;
   __ movp(jmp_reg, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
   __ movp(jmp_reg, FieldOperand(jmp_reg,
                                 SharedFunctionInfo::kConstructStubOffset));
   __ leap(jmp_reg, FieldOperand(jmp_reg, Code::kHeaderSize));
   __ jmp(jmp_reg);
 
   // rdi: called object
   // rax: number of arguments
@@ skipping 2993 matching lines @@
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, getter_arg,
                            kStackSpace, nullptr, return_value_operand, NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64