[turbofan] Simplifying handling of callee-cleanup stack area.

src/compiler/arm64/code-generator-arm64.cc

 // Copyright 2014 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 "src/arm64/macro-assembler-arm64.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 1160 matching lines @@
     __ Pop(fp, lr);
     __ Ret();
   } else if (descriptor->IsJSFunctionCall() || needs_frame_) {
     // Canonicalize JSFunction return sites for now.
     if (return_label_.is_bound()) {
       __ B(&return_label_);
     } else {
       __ Bind(&return_label_);
       __ Mov(jssp, fp);
       __ Pop(fp, lr);
-      int pop_count = descriptor->IsJSFunctionCall()
-                          ? static_cast<int>(descriptor->JSParameterCount())
-                          : (info()->IsStub()
-                                 ? info()->code_stub()->GetStackParameterCount()
-                                 : 0);
+      int pop_count = static_cast<int>(descriptor->StackParameterCount());
       if (pop_count != 0) {
         __ Drop(pop_count);
       }
       __ Ret();
     }
   } else {
     __ Ret();
   }
 }
 
@@ skipping 178 matching lines @@
       }
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8