[turbofan] Extend the type fixup to LoadField as well.

src/compiler/load-elimination.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 "src/compiler/load-elimination.h"
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/simplified-operator.h"
@@ skipping 16 matching lines @@
 }
 
 Reduction LoadElimination::ReduceLoadField(Node* node) {
   DCHECK_EQ(IrOpcode::kLoadField, node->opcode());
   FieldAccess const access = FieldAccessOf(node->op());
   Node* object = NodeProperties::GetValueInput(node, 0);
   for (Node* effect = NodeProperties::GetEffectInput(node);;
        effect = NodeProperties::GetEffectInput(effect)) {
     switch (effect->opcode()) {
       case IrOpcode::kLoadField: {
+        FieldAccess const effect_access = FieldAccessOf(effect->op());
         if (object == NodeProperties::GetValueInput(effect, 0) &&
-            access == FieldAccessOf(effect->op())) {
+            access == effect_access && effect_access.type->Is(access.type)) {
           Node* const value = effect;
           ReplaceWithValue(node, value);
           return Replace(value);
         }
         break;
       }
       case IrOpcode::kStoreField: {
         if (access == FieldAccessOf(effect->op())) {
           if (object == NodeProperties::GetValueInput(effect, 0)) {
             Node* const value = NodeProperties::GetValueInput(effect, 1);
@@ skipping 46 matching lines @@
       }
     }
   }
   UNREACHABLE();
   return NoChange();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8