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

src/x64/builtins-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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
@@ skipping 498 matching lines @@
   CHECK(!FLAG_pretenuring_call_new);
 
   {
     FrameScope frame_scope(masm, StackFrame::CONSTRUCT);
 
     // Store a smi-tagged arguments count on the stack.
     __ Integer32ToSmi(rax, rax);
     __ Push(rax);
     __ SmiToInteger32(rax, rax);
 
+    // Push new.target
+    __ Push(rdx);
+
     // receiver is the hole.
     __ Push(masm->isolate()->factory()->the_hole_value());
 
     // Set up pointer to last argument.
     __ leap(rbx, Operand(rbp, StandardFrameConstants::kCallerSPOffset));
 
     // Copy arguments and receiver to the expression stack.
     Label loop, entry;
     __ movp(rcx, rax);
     __ jmp(&entry);
     __ bind(&loop);
     __ Push(Operand(rbx, rcx, times_pointer_size, 0));
     __ bind(&entry);
     __ decp(rcx);
     __ j(greater_equal, &loop);
 
     // Call the function.
+    __ incp(rax);  // Pushed new.target.
     ParameterCount actual(rax);
     __ InvokeFunction(rdi, actual, CALL_FUNCTION, NullCallWrapper());
 
     // Restore context from the frame.
     __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
 
     __ movp(rbx, Operand(rsp, 0));  // Get arguments count.
   }                                 // Leave construct frame.
 
   // Remove caller arguments from the stack and return.
@@ skipping 1046 matching lines @@
   __ bind(&ok);
   __ ret(0);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64