Drop is_eval_scope when checking how to access dynamic globals. It has no influence

src/full-codegen/s390/full-codegen-s390.cc

 // Copyright 2015 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_S390
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 1112 matching lines @@
         __ LoadP(temp, ContextMemOperand(current, Context::EXTENSION_INDEX));
         __ JumpIfNotRoot(temp, Heap::kTheHoleValueRootIndex, slow);
       }
       // Load next context in chain.
       __ LoadP(next, ContextMemOperand(current, Context::PREVIOUS_INDEX));
       // Walk the rest of the chain without clobbering cp.
       current = next;
     }
     // If no outer scope calls eval, we do not need to check more
     // context extensions.
-    if (!s->outer_scope_calls_sloppy_eval() || s->is_eval_scope()) break;
+    if (!s->outer_scope_calls_sloppy_eval()) break;
     s = s->outer_scope();
   }
 
-  if (s->is_eval_scope()) {
-    Label loop, fast;
-    if (!current.is(next)) {
-      __ Move(next, current);
-    }
-    __ bind(&loop);
-    // Terminate at native context.
-    __ LoadP(temp, FieldMemOperand(next, HeapObject::kMapOffset));
-    __ CompareRoot(temp, Heap::kNativeContextMapRootIndex);
-    __ beq(&fast, Label::kNear);
-    // Check that extension is "the hole".
-    __ LoadP(temp, ContextMemOperand(next, Context::EXTENSION_INDEX));
-    __ JumpIfNotRoot(temp, Heap::kTheHoleValueRootIndex, slow);
-    // Load next context in chain.
-    __ LoadP(next, ContextMemOperand(next, Context::PREVIOUS_INDEX));
-    __ b(&loop);
-    __ bind(&fast);
-  }
-
   // All extension objects were empty and it is safe to use a normal global
   // load machinery.
   EmitGlobalVariableLoad(proxy, typeof_mode);
 }
 
 MemOperand FullCodeGenerator::ContextSlotOperandCheckExtensions(Variable* var,
                                                                 Label* slow) {
   DCHECK(var->IsContextSlot());
   Register context = cp;
   Register next = r5;
@@ skipping 2508 matching lines @@
   DCHECK(kOSRBranchInstruction == br_instr);
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OnStackReplacement()->entry());
   return ON_STACK_REPLACEMENT;
 }
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_S390