Introduce a base pointer field in FixedTypedArrayBase and teach GC about it

src/hydrogen.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.
 
 #include "src/hydrogen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 9898 matching lines @@
   if (array_type == kExternalFloat64Array) {
     elements->MakeDoubleAligned();
   }
 #endif
 
   AddStoreMapConstant(elements, fixed_typed_array_map);
 
   Add<HStoreNamedField>(elements,
       HObjectAccess::ForFixedArrayLength(),
       length);
+  Add<HStoreNamedField>(
+      elements, HObjectAccess::ForFixedTypedArrayBaseBasePointer(), elements);
 
   HValue* filler = Add<HConstant>(static_cast<int32_t>(0));
 
   if (initialize) {
     LoopBuilder builder(this, context(), LoopBuilder::kPostIncrement);
 
     HValue* key = builder.BeginBody(
         Add<HConstant>(static_cast<int32_t>(0)),
         length, Token::LT);
     Add<HStoreKeyed>(elements, key, filler, fixed_elements_kind);
@@ skipping 3245 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8