Do not use new struct type where unnecessary.

src/ast/ast-types.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 <iomanip>
 
 #include "src/ast/ast-types.h"
 
 #include "src/handles-inl.h"
 #include "src/objects-inl.h"
@@ skipping 284 matching lines @@
     case MUTABLE_HEAP_NUMBER_TYPE:
     case FREE_SPACE_TYPE:
 #define FIXED_TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
   case FIXED_##TYPE##_ARRAY_TYPE:
 
       TYPED_ARRAYS(FIXED_TYPED_ARRAY_CASE)
 #undef FIXED_TYPED_ARRAY_CASE
     case FILLER_TYPE:
     case ACCESS_CHECK_INFO_TYPE:
     case INTERCEPTOR_INFO_TYPE:
-    case CALL_HANDLER_INFO_TYPE:
     case PROMISE_RESOLVE_THENABLE_JOB_INFO_TYPE:
     case PROMISE_REACTION_JOB_INFO_TYPE:
     case FUNCTION_TEMPLATE_INFO_TYPE:
     case OBJECT_TEMPLATE_INFO_TYPE:
     case ALLOCATION_MEMENTO_TYPE:
-    case TYPE_FEEDBACK_INFO_TYPE:
     case ALIASED_ARGUMENTS_ENTRY_TYPE:
     case DEBUG_INFO_TYPE:
-    case BREAK_POINT_INFO_TYPE:
     case STACK_FRAME_INFO_TYPE:
     case CELL_TYPE:
     case WEAK_CELL_TYPE:
     case PROTOTYPE_INFO_TYPE:
     case TUPLE2_TYPE:
     case TUPLE3_TYPE:
     case CONTEXT_EXTENSION_TYPE:
-    case CONSTANT_ELEMENTS_PAIR_TYPE:
+    case PADDING_TYPE_1:
+    case PADDING_TYPE_2:
+    case PADDING_TYPE_3:
+    case PADDING_TYPE_4:
       UNREACHABLE();
       return kNone;
   }
   UNREACHABLE();
   return kNone;
 }
 
 AstType::bitset AstBitsetType::Lub(i::Object* value) {
   DisallowHeapAllocation no_allocation;
   if (value->IsNumber()) {
@@ skipping 966 matching lines @@
 }
 
 // -----------------------------------------------------------------------------
 // Instantiations.
 
 template class AstType::Iterator<i::Map>;
 template class AstType::Iterator<i::Object>;
 
 }  // namespace internal
 }  // namespace v8