[turbofan] Track up to 32 fields for LoadElimination.

src/compiler/load-elimination.h

 // 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.
 
 #ifndef V8_COMPILER_LOAD_ELIMINATION_H_
 #define V8_COMPILER_LOAD_ELIMINATION_H_
 
 #include "src/compiler/graph-reducer.h"
 
 namespace v8 {
@@ skipping 89 matching lines @@
           copy->info_for_node_.insert(this_it);
         }
       }
       return copy;
     }
 
    private:
     ZoneMap<Node*, Node*> info_for_node_;
   };
 
-  static size_t const kMaxTrackedFields = 16;
+  static size_t const kMaxTrackedFields = 32;
 
   class AbstractState final : public ZoneObject {
    public:
     AbstractState() {
       for (size_t i = 0; i < arraysize(fields_); ++i) {
         fields_[i] = nullptr;
       }
     }
 
     bool Equals(AbstractState const* that) const;
@@ skipping 50 matching lines @@
   AbstractStateForEffectNodes node_states_;
 
   DISALLOW_COPY_AND_ASSIGN(LoadElimination);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_LOAD_ELIMINATION_H_