[turbofan] Machine operators are globally shared singletons.

test/cctest/compiler/test-changes-lowering.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 <limits>
 
 #include "src/compiler/change-lowering.h"
 #include "src/compiler/control-builders.h"
 #include "src/compiler/generic-node-inl.h"
 #include "src/compiler/js-graph.h"
@@ skipping 204 matching lines @@
       }
     }
   }
 }
 
 
 TEST(RunChangeTaggedToFloat64) {
   ChangesLoweringTester<int32_t> t(kMachAnyTagged);
   double result;
 
-  t.BuildStoreAndLower(t.simplified()->ChangeTaggedToFloat64(),
-                       t.machine()->Store(kMachFloat64, kNoWriteBarrier),
-                       &result);
+  t.BuildStoreAndLower(
+      t.simplified()->ChangeTaggedToFloat64(),
+      t.machine()->Store(StoreRepresentation(kMachFloat64, kNoWriteBarrier)),
+      &result);
 
   if (Pipeline::SupportedTarget()) {
     FOR_INT32_INPUTS(i) {
       int32_t input = *i;
 
       if (Smi::IsValid(input)) {
         t.Call(Smi::FromInt(input));
         CHECK_EQ(input, static_cast<int32_t>(result));
       }
 
@@ skipping 164 matching lines @@
 
         input = *i;
         Object* result = t.CallWithPotentialGC<Object>();
         t.CheckNumber(input, result);
       }
     }
   }
 }
 
 #endif  // V8_TURBOFAN_BACKEND