[builtins] Remove the unused AllocationSite slot from ConstructFrame.

src/builtins/x64/builtins-x64.cc

Index: src/builtins/x64/builtins-x64.cc
diff --git a/src/builtins/x64/builtins-x64.cc b/src/builtins/x64/builtins-x64.cc
index 6469614b6b083e13a34ef670b9c7183fc613a79d..ed8300598a88fd7dc3210fd0874d13f80738e04c 100644
--- a/src/builtins/x64/builtins-x64.cc
+++ b/src/builtins/x64/builtins-x64.cc
@@ -112,15 +112,15 @@ void Builtins::Generate_InOptimizationQueue(MacroAssembler* masm) {
   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
   // -----------------------------------
 
@@ -129,10 +129,8 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     FrameScope scope(masm, StackFrame::CONSTRUCT);
 
     // Preserve the incoming parameters on the stack.
-    __ AssertUndefinedOrAllocationSite(rbx);
-    __ Push(rsi);
-    __ Push(rbx);
     __ Integer32ToSmi(rcx, rax);
+    __ Push(rsi);
     __ Push(rcx);
 
     if (create_implicit_receiver) {
@@ -197,13 +195,13 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
       // 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.
@@ -246,6 +244,8 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
   __ ret(0);
 }
 
+}  // namespace
+
 void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
   Generate_JSConstructStubHelper(masm, false, true, false);
 }