[cleanup] Global variable declarations are never hole initialized

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/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 747 matching lines @@
   // need to "declare" it at runtime to make sure it actually exists in the
   // local context.
   VariableProxy* proxy = declaration->proxy();
   VariableMode mode = declaration->mode();
   Variable* variable = proxy->var();
   bool hole_init = mode == LET || mode == CONST;
 
   switch (variable->location()) {
     case VariableLocation::GLOBAL:
     case VariableLocation::UNALLOCATED:
+      DCHECK(!variable->binding_needs_init());
       globals_->Add(variable->name(), zone());
-      globals_->Add(variable->binding_needs_init()
-                        ? isolate()->factory()->the_hole_value()
-                        : isolate()->factory()->undefined_value(),
-                    zone());
+      globals_->Add(isolate()->factory()->undefined_value(), zone());
       break;
 
     case VariableLocation::PARAMETER:
     case VariableLocation::LOCAL:
       if (hole_init) {
         Comment cmnt(masm_, "[ VariableDeclaration");
         __ LoadRoot(x10, Heap::kTheHoleValueRootIndex);
         __ Str(x10, StackOperand(variable));
       }
       break;
@@ skipping 3208 matching lines @@
   }
 
   return INTERRUPT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64