[turbofan] Use CheckMaps in JSGlobalObjectSpecialization.

src/compiler/js-global-object-specialization.cc

 // Copyright 2015 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/js-global-object-specialization.h"
 
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/js-graph.h"
@@ skipping 168 matching lines @@
     case PropertyCellType::kConstantType: {
       // Record a code dependency on the cell, and just deoptimize if the new
       // values' type doesn't match the type of the previous value in the cell.
       dependencies()->AssumePropertyCell(property_cell);
       Type* property_cell_value_type;
       if (property_cell_value->IsHeapObject()) {
         // Check that the {value} is a HeapObject.
         value = effect = graph()->NewNode(simplified()->CheckTaggedPointer(),
                                           value, effect, control);
 
-        // Load the {value} map check against the {property_cell} map.
-        Node* value_map = effect =
-            graph()->NewNode(simplified()->LoadField(AccessBuilder::ForMap()),
-                             value, effect, control);
+        // Check {value} map agains the {property_cell} map.
         Handle<Map> property_cell_value_map(
             Handle<HeapObject>::cast(property_cell_value)->map(), isolate());
-        Node* check = graph()->NewNode(
-            simplified()->ReferenceEqual(Type::Any()), value_map,
-            jsgraph()->HeapConstant(property_cell_value_map));
-        effect =
-            graph()->NewNode(simplified()->CheckIf(), check, effect, control);
+        effect = graph()->NewNode(
+            simplified()->CheckMaps(1), value,
+            jsgraph()->HeapConstant(property_cell_value_map), effect, control);
         property_cell_value_type = Type::TaggedPointer();
       } else {
         // Check that the {value} is a Smi.
         value = effect = graph()->NewNode(simplified()->CheckTaggedSigned(),
                                           value, effect, control);
         property_cell_value_type = Type::TaggedSigned();
       }
       effect = graph()->NewNode(
           simplified()->StoreField(
               AccessBuilder::ForPropertyCellValue(property_cell_value_type)),
@@ skipping 68 matching lines @@
 }
 
 
 SimplifiedOperatorBuilder* JSGlobalObjectSpecialization::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8