[builtins]: Uniformly push argument count in TF-generated builtins

src/compiler/x64/code-generator-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.
 
 #include "src/compiler/code-generator.h"
 
 #include <limits>
 
 #include "src/compilation-info.h"
 #include "src/compiler/code-generator-impl.h"
@@ skipping 2379 matching lines @@
 void CodeGenerator::AssembleConstructFrame() {
   CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
   if (frame_access_state()->has_frame()) {
     int pc_base = __ pc_offset();
 
     if (descriptor->IsCFunctionCall()) {
       __ pushq(rbp);
       __ movq(rbp, rsp);
     } else if (descriptor->IsJSFunctionCall()) {
       __ Prologue(this->info()->GeneratePreagedPrologue());
+      if (descriptor->PushArgumentCount()) {
+        __ pushq(kJavaScriptCallArgCountRegister);
+      }
     } else {
       __ StubPrologue(info()->GetOutputStackFrameType());
     }
 
     if (!descriptor->IsJSFunctionCall() || !info()->GeneratePreagedPrologue()) {
       unwinding_info_writer_.MarkFrameConstructed(pc_base);
     }
   }
-  int shrink_slots = frame()->GetSpillSlotCount();
+  int shrink_slots =
+      frame()->GetTotalFrameSlotCount() - descriptor->CalculateFixedFrameSize();
 
   if (info()->is_osr()) {
     // TurboFan OSR-compiled functions cannot be entered directly.
     __ Abort(kShouldNotDirectlyEnterOsrFunction);
 
     // Unoptimized code jumps directly to this entrypoint while the unoptimized
     // frame is still on the stack. Optimized code uses OSR values directly from
     // the unoptimized frame. Thus, all that needs to be done is to allocate the
     // remaining stack slots.
     if (FLAG_code_comments) __ RecordComment("-- OSR entrypoint --");
@@ skipping 354 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8