X87: [builtins] Remove the unused AllocationSite slot from ConstructFrame.

  port 77419488 (r40377)

  original commit message:
  This slot is completely unused and always undefined anyways, so there's
  no need to maintain the slot during object construction.

BUG=

Review-Url: https://codereview.chromium.org/2425183002
Cr-Commit-Position: refs/heads/master@{#40389}

src/builtins/x87/builtins-x87.cc

@@ -110,15 +110,15 @@ 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 -------------
   //  -- eax: number of arguments
   //  -- esi: context
   //  -- edi: constructor function
-  //  -- ebx: allocation site or undefined
   //  -- edx: new target
   // -----------------------------------
 
@@ -127,10 +127,8 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     FrameScope scope(masm, StackFrame::CONSTRUCT);
 
     // Preserve the incoming parameters on the stack.
-    __ AssertUndefinedOrAllocationSite(ebx);
-    __ push(esi);
-    __ push(ebx);
     __ SmiTag(eax);
+    __ push(esi);
     __ push(eax);
 
     if (create_implicit_receiver) {
@@ -198,12 +196,12 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
       Label use_receiver, exit;
 
       // If the result is a smi, it is *not* an object in the ECMA sense.
-      __ JumpIfSmi(eax, &use_receiver);
+      __ JumpIfSmi(eax, &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.
       __ CmpObjectType(eax, FIRST_JS_RECEIVER_TYPE, ecx);
-      __ 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.
@@ -245,6 +243,8 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
   __ ret(0);
 }
 
+}  // namespace
+
 void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
   Generate_JSConstructStubHelper(masm, false, true, false);
 }