[builtins] Add support for NewTarget to Execution::New.

src/full-codegen/x64/full-codegen-x64.cc

 // 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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/compiler.h"
@@ skipping 3932 matching lines @@
 
 
 void FullCodeGenerator::EmitDefaultConstructorCallSuper(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 2);
 
   // Evaluate new.target and super constructor.
   VisitForStackValue(args->at(0));
   VisitForStackValue(args->at(1));
 
-  // Load original constructor into rcx.
-  __ movp(rcx, Operand(rsp, 1 * kPointerSize));
-
   // Check if the calling frame is an arguments adaptor frame.
   Label adaptor_frame, args_set_up, runtime;
   __ movp(rdx, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
   __ movp(rbx, Operand(rdx, StandardFrameConstants::kContextOffset));
   __ Cmp(rbx, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
   __ j(equal, &adaptor_frame);
   // default constructor has no arguments, so no adaptor frame means no args.
   __ movp(rax, Immediate(0));
   __ jmp(&args_set_up);
 
   // Copy arguments from adaptor frame.
   {
     __ bind(&adaptor_frame);
     __ movp(rbx, Operand(rdx, ArgumentsAdaptorFrameConstants::kLengthOffset));
     __ SmiToInteger64(rbx, rbx);
 
     __ movp(rax, rbx);
     __ leap(rdx, Operand(rdx, rbx, times_pointer_size,
                          StandardFrameConstants::kCallerSPOffset));
     Label loop;
     __ bind(&loop);
     __ Push(Operand(rdx, -1 * kPointerSize));
     __ subp(rdx, Immediate(kPointerSize));
     __ decp(rbx);
     __ j(not_zero, &loop);
   }
 
   __ bind(&args_set_up);
-  __ movp(rdi, Operand(rsp, rax, times_pointer_size, 0));
-  __ LoadRoot(rbx, Heap::kUndefinedValueRootIndex);
-
-  CallConstructStub stub(isolate(), SUPER_CONSTRUCTOR_CALL);
-  __ call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
+  __ movp(rdx, Operand(rsp, rax, times_pointer_size, 1 * kPointerSize));
+  __ movp(rdi, Operand(rsp, rax, times_pointer_size, 0 * kPointerSize));
+  __ Call(isolate()->builtins()->Construct(), RelocInfo::CONSTRUCT_CALL);
 
   // Restore context register.
   __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
 
   context()->DropAndPlug(1, rax);
 }
 
 
 void FullCodeGenerator::EmitRegExpConstructResult(CallRuntime* expr) {
   RegExpConstructResultStub stub(isolate());
@@ skipping 1191 matching lines @@
             Assembler::target_address_at(call_target_address,
                                          unoptimized_code));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64