Ensure we can reliably check the cell for validity of global property

src/ic/arm64/handler-compiler-arm64.cc

Index: src/ic/arm64/handler-compiler-arm64.cc
diff --git a/src/ic/arm64/handler-compiler-arm64.cc b/src/ic/arm64/handler-compiler-arm64.cc
index de1b9f598fee07449ac1aa4adb674d3d2a4cf8f2..130dd219fa88b3034d8557f39c7c7fd078abb7f0 100644
--- a/src/ic/arm64/handler-compiler-arm64.cc
+++ b/src/ic/arm64/handler-compiler-arm64.cc
@@ -334,7 +334,7 @@ void ElementHandlerCompiler::GenerateStoreSlow(MacroAssembler* masm) {
 
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal(
-    Handle<PropertyCell> cell, Handle<Name> name, bool is_configurable) {
+    Handle<PropertyCell> cell, Handle<Name> name) {
   Label miss;
   if (IC::ICUseVector(kind())) {
     PushVectorAndSlot();
@@ -347,10 +347,7 @@ Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal(
   __ LoadWeakValue(result, weak_cell, &miss);
   __ Ldr(result, FieldMemOperand(result, Cell::kValueOffset));
 
-  // Check for deleted property if property can actually be deleted.
-  if (is_configurable) {
-    __ JumpIfRoot(result, Heap::kTheHoleValueRootIndex, &miss);
-  }
+  __ JumpIfRoot(result, Heap::kTheHoleValueRootIndex, &miss);
 
   Counters* counters = isolate()->counters();
   __ IncrementCounter(counters->named_load_global_stub(), 1, x1, x3);
@@ -548,7 +545,8 @@ Register PropertyHandlerCompiler::CheckPrototypes(
   LOG(isolate(), IntEvent("check-maps-depth", depth + 1));
 
   // Check the holder map.
-  if (depth != 0 || check == CHECK_ALL_MAPS) {
+  if (!current_map->IsJSGlobalObjectMap() &&
+      (depth != 0 || check == CHECK_ALL_MAPS)) {
     // Check the holder map.
     __ Ldr(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset));
     Handle<WeakCell> cell = Map::WeakCellForMap(current_map);