PPC/s390: [wasm] adding case for kAttachedReference in Serializer/Deseriealizer

src/snapshot/serializer.cc

 // Copyright 2016 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 "src/snapshot/serializer.h"
 
 #include "src/macro-assembler.h"
 #include "src/snapshot/natives.h"
 
 namespace v8 {
@@ skipping 230 matching lines @@
   sink_.PutInt(reference.back_reference(), "BackRefValue");
   hot_objects_.Add(object);
 }
 
 void Serializer::PutAttachedReference(SerializerReference reference,
                                       HowToCode how_to_code,
                                       WhereToPoint where_to_point) {
   DCHECK(reference.is_attached_reference());
   DCHECK((how_to_code == kPlain && where_to_point == kStartOfObject) ||
          (how_to_code == kPlain && where_to_point == kInnerPointer) ||
+         (how_to_code == kFromCode && where_to_point == kStartOfObject) ||
          (how_to_code == kFromCode && where_to_point == kInnerPointer));
   sink_.Put(kAttachedReference + how_to_code + where_to_point, "AttachedRef");
   sink_.PutInt(reference.attached_reference_index(), "AttachedRefIndex");
 }
 
 int Serializer::PutAlignmentPrefix(HeapObject* object) {
   AllocationAlignment alignment = object->RequiredAlignment();
   if (alignment != kWordAligned) {
     DCHECK(1 <= alignment && alignment <= 3);
     byte prefix = (kAlignmentPrefix - 1) + alignment;
@@ skipping 529 matching lines @@
   if (to_skip != 0 && return_skip == kIgnoringReturn) {
     sink_->Put(kSkip, "Skip");
     sink_->PutInt(to_skip, "SkipDistance");
     to_skip = 0;
   }
   return to_skip;
 }
 
 }  // namespace internal
 }  // namespace v8