Don't call FastNewFunctionContextStub if context is bigger than kMaxRegularHeapObjectSize.

src/full-codegen/arm64/full-codegen-arm64.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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/full-codegen/full-codegen.h"
 #include "src/ast/compile-time-value.h"
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
@@ skipping 185 matching lines @@
       __ Push(x1, x10);
       __ CallRuntime(Runtime::kNewScriptContext);
       PrepareForBailoutForId(BailoutId::ScriptContext(),
                              BailoutState::TOS_REGISTER);
       // The new target value is not used, clobbering is safe.
       DCHECK_NULL(info->scope()->new_target_var());
     } else {
       if (info->scope()->new_target_var() != nullptr) {
         __ Push(x3);  // Preserve new target.
       }
-      FastNewFunctionContextStub stub(isolate());
-      __ Mov(FastNewFunctionContextDescriptor::SlotsRegister(), slots);
-      __ CallStub(&stub);
-      // Result of FastNewFunctionContextStub is always in new space.
-      need_write_barrier = false;
+      if (slots <= FastNewFunctionContextStub::kMaximumSlots) {
+        FastNewFunctionContextStub stub(isolate());
+        __ Mov(FastNewFunctionContextDescriptor::SlotsRegister(), slots);
+        __ CallStub(&stub);
+        // Result of FastNewFunctionContextStub is always in new space.
+        need_write_barrier = false;
+      } else {
+        __ Push(x1);
+        __ CallRuntime(Runtime::kNewFunctionContext);
+      }
       if (info->scope()->new_target_var() != nullptr) {
         __ Pop(x3);  // Restore new target.
       }
     }
     function_in_register_x1 = false;
     // Context is returned in x0.  It replaces the context passed to us.
     // It's saved in the stack and kept live in cp.
     __ Mov(cp, x0);
     __ Str(x0, MemOperand(fp, StandardFrameConstants::kContextOffset));
     // Copy any necessary parameters into the context.
@@ skipping 3483 matching lines @@
   }
 
   return INTERRUPT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64