[builtins] Remove the unused AllocationSite slot from ConstructFrame.

src/builtins/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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 94 matching lines @@
   Label ok;
   __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
   __ j(above_equal, &ok);
 
   GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode);
 
   __ bind(&ok);
   GenerateTailCallToSharedCode(masm);
 }
 
-static void Generate_JSConstructStubHelper(MacroAssembler* masm,
-                                           bool is_api_function,
-                                           bool create_implicit_receiver,
-                                           bool check_derived_construct) {
+namespace {
+
+void Generate_JSConstructStubHelper(MacroAssembler* masm, bool is_api_function,
+                                    bool create_implicit_receiver,
+                                    bool check_derived_construct) {
   // ----------- S t a t e -------------
   //  -- rax: number of arguments
   //  -- rsi: context
   //  -- rdi: constructor function
-  //  -- rbx: allocation site or undefined
   //  -- rdx: new target
   // -----------------------------------
 
   // Enter a construct frame.
   {
     FrameScope scope(masm, StackFrame::CONSTRUCT);
 
     // Preserve the incoming parameters on the stack.
-    __ AssertUndefinedOrAllocationSite(rbx);
+    __ Integer32ToSmi(rcx, rax);
     __ Push(rsi);
-    __ Push(rbx);
-    __ Integer32ToSmi(rcx, rax);
     __ Push(rcx);
 
     if (create_implicit_receiver) {
       // Allocate the new receiver object.
       __ Push(rdi);
       __ Push(rdx);
       FastNewObjectStub stub(masm->isolate());
       __ CallStub(&stub);
       __ movp(rbx, rax);
       __ Pop(rdx);
@@ skipping 44 matching lines @@
 
     // Restore context from the frame.
     __ movp(rsi, Operand(rbp, ConstructFrameConstants::kContextOffset));
 
     if (create_implicit_receiver) {
       // If the result is an object (in the ECMA sense), we should get rid
       // of the receiver and use the result; see ECMA-262 section 13.2.2-7
       // on page 74.
       Label use_receiver, exit;
       // If the result is a smi, it is *not* an object in the ECMA sense.
-      __ JumpIfSmi(rax, &use_receiver);
+      __ JumpIfSmi(rax, &use_receiver, Label::kNear);
 
       // If the type of the result (stored in its map) is less than
       // FIRST_JS_RECEIVER_TYPE, it is not an object in the ECMA sense.
       STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE);
       __ CmpObjectType(rax, FIRST_JS_RECEIVER_TYPE, rcx);
-      __ j(above_equal, &exit);
+      __ j(above_equal, &exit, Label::kNear);
 
       // Throw away the result of the constructor invocation and use the
       // on-stack receiver as the result.
       __ bind(&use_receiver);
       __ movp(rax, Operand(rsp, 0));
 
       // Restore the arguments count and leave the construct frame. The
       // arguments count is stored below the receiver.
       __ bind(&exit);
       __ movp(rbx, Operand(rsp, 1 * kPointerSize));
@@ skipping 22 matching lines @@
   SmiIndex index = masm->SmiToIndex(rbx, rbx, kPointerSizeLog2);
   __ leap(rsp, Operand(rsp, index.reg, index.scale, 1 * kPointerSize));
   __ PushReturnAddressFrom(rcx);
   if (create_implicit_receiver) {
     Counters* counters = masm->isolate()->counters();
     __ IncrementCounter(counters->constructed_objects(), 1);
   }
   __ ret(0);
 }
 
+}  // namespace
+
 void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
   Generate_JSConstructStubHelper(masm, false, true, false);
 }
 
 void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
   Generate_JSConstructStubHelper(masm, true, false, false);
 }
 
 void Builtins::Generate_JSBuiltinsConstructStub(MacroAssembler* masm) {
   Generate_JSConstructStubHelper(masm, false, false, false);
@@ skipping 2814 matching lines @@
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   Generate_OnStackReplacementHelper(masm, true);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64