Do not add extra argument for new.target

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 48a2a885ed885fb2e2ec9e8ced9f63f2bdbb4def..7f4560ead08534a389feac20fd8ebd57bd0b2858 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -539,7 +539,6 @@ void FunctionPrototypeStub::Generate(MacroAssembler* masm) {
 
 
 void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
-  CHECK(!has_new_target());
   // The key is in rdx and the parameter count is in rax.
   DCHECK(rdx.is(ArgumentsAccessReadDescriptor::index()));
   DCHECK(rax.is(ArgumentsAccessReadDescriptor::parameter_count()));
@@ -606,9 +605,6 @@ void ArgumentsAccessStub::GenerateNewSloppyFast(MacroAssembler* masm) {
   // Registers used over the whole function:
   //  rbx: the mapped parameter count (untagged)
   //  rax: the allocated object (tagged).
-
-  CHECK(!has_new_target());
-
   Factory* factory = isolate()->factory();
 
   StackArgumentsAccessor args(rsp, 3, ARGUMENTS_DONT_CONTAIN_RECEIVER);
@@ -822,7 +818,6 @@ void ArgumentsAccessStub::GenerateNewSloppySlow(MacroAssembler* masm) {
   // rsp[8]  : number of parameters
   // rsp[16] : receiver displacement
   // rsp[24] : function
-  CHECK(!has_new_target());
 
   // Check if the calling frame is an arguments adaptor frame.
   Label runtime;
@@ -960,19 +955,6 @@ void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) {
   __ bind(&adaptor_frame);
   __ movp(rcx, Operand(rdx, ArgumentsAdaptorFrameConstants::kLengthOffset));
 
-  if (has_new_target()) {
-    // If the constructor was [[Call]]ed, the call will not push a new.target
-    // onto the stack. In that case the arguments array we construct is bogus,
-    // bu we do not care as the constructor throws immediately.
-    __ Cmp(rcx, Smi::FromInt(0));
-    Label skip_decrement;
-    __ j(equal, &skip_decrement);
-    // Subtract 1 from smi-tagged arguments count.
-    __ SmiToInteger32(rcx, rcx);
-    __ decl(rcx);
-    __ Integer32ToSmi(rcx, rcx);
-    __ bind(&skip_decrement);
-  }
   __ movp(args.GetArgumentOperand(2), rcx);
   __ SmiToInteger64(rcx, rcx);
   __ leap(rdx, Operand(rdx, rcx, times_pointer_size,