[runtime] Introduce a proper %NewArray runtime entry.

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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 4716 matching lines @@
   __ SmiToInteger32(rdx, rdx);
   STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0);
   __ andp(rdx, Immediate(AllocationSite::ElementsKindBits::kMask));
   GenerateDispatchToArrayStub(masm, DONT_OVERRIDE);
 
   __ bind(&no_info);
   GenerateDispatchToArrayStub(masm, DISABLE_ALLOCATION_SITES);
 
   // Subclassing
   __ bind(&subclassing);
-  __ Pop(rcx);  // return address.
-  __ Push(rdi);
-  __ Push(rdx);
-
-  // Adjust argc.
   switch (argument_count()) {
     case ANY:
-    case MORE_THAN_ONE:
-      __ addp(rax, Immediate(2));
+    case MORE_THAN_ONE: {
+      StackArgumentsAccessor args(rsp, rax);
+      __ movp(args.GetReceiverOperand(), rdi);
+      __ addp(rax, Immediate(3));
       break;
-    case NONE:
-      __ movp(rax, Immediate(2));
+    }
+    case NONE: {
+      StackArgumentsAccessor args(rsp, 0);
+      __ movp(args.GetReceiverOperand(), rdi);
+      __ Set(rax, 3);
       break;
-    case ONE:
-      __ movp(rax, Immediate(3));
+    }
+    case ONE: {
+      StackArgumentsAccessor args(rsp, 1);
+      __ movp(args.GetReceiverOperand(), rdi);
+      __ Set(rax, 4);
       break;
+    }
   }
-
-  __ Push(rcx);
-  __ JumpToExternalReference(
-      ExternalReference(Runtime::kArrayConstructorWithSubclassing, isolate()),
-      1);
+  __ PopReturnAddressTo(rcx);
+  __ Push(rdx);
+  __ Push(rbx);
+  __ PushReturnAddressFrom(rcx);
+  __ JumpToExternalReference(ExternalReference(Runtime::kNewArray, isolate()),
+                             1);
 }
 
 
 void InternalArrayConstructorStub::GenerateCase(
     MacroAssembler* masm, ElementsKind kind) {
   Label not_zero_case, not_one_case;
   Label normal_sequence;
 
   __ testp(rax, rax);
   __ j(not_zero, &not_zero_case);
@@ skipping 628 matching lines @@
                            kStackSpace, nullptr, return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64