[turbofan] Make an OptionalOperator for MachineOperatorBuilder.

test/unittests/compiler/instruction-selector-unittest.h

Index: test/unittests/compiler/instruction-selector-unittest.h
diff --git a/test/unittests/compiler/instruction-selector-unittest.h b/test/unittests/compiler/instruction-selector-unittest.h
index 9ba513bfa82528b34e05b9d6c4ca60ed457ca0c7..a1b2f1811f42cba2372b827bdefae7c9c3954c55 100644
--- a/test/unittests/compiler/instruction-selector-unittest.h
+++ b/test/unittests/compiler/instruction-selector-unittest.h
@@ -37,22 +37,25 @@ class InstructionSelectorTest : public TestWithContext,
   class StreamBuilder final : public RawMachineAssembler {
    public:
     StreamBuilder(InstructionSelectorTest* test, MachineType return_type)
-        : RawMachineAssembler(test->isolate(),
-                              new (test->zone()) Graph(test->zone()),
-                              MakeMachineSignature(test->zone(), return_type)),
+        : RawMachineAssembler(
+              test->isolate(), new (test->zone()) Graph(test->zone()),
+              MakeMachineSignature(test->zone(), return_type), kMachPtr,
+              MachineOperatorBuilder::kAllOptionalOps),
           test_(test) {}
     StreamBuilder(InstructionSelectorTest* test, MachineType return_type,
                   MachineType parameter0_type)
         : RawMachineAssembler(
               test->isolate(), new (test->zone()) Graph(test->zone()),
-              MakeMachineSignature(test->zone(), return_type, parameter0_type)),
+              MakeMachineSignature(test->zone(), return_type, parameter0_type),
+              kMachPtr, MachineOperatorBuilder::kAllOptionalOps),
           test_(test) {}
     StreamBuilder(InstructionSelectorTest* test, MachineType return_type,
                   MachineType parameter0_type, MachineType parameter1_type)
         : RawMachineAssembler(
               test->isolate(), new (test->zone()) Graph(test->zone()),
               MakeMachineSignature(test->zone(), return_type, parameter0_type,
-                                   parameter1_type)),
+                                   parameter1_type),
+              kMachPtr, MachineOperatorBuilder::kAllOptionalOps),
           test_(test) {}
     StreamBuilder(InstructionSelectorTest* test, MachineType return_type,
                   MachineType parameter0_type, MachineType parameter1_type,
@@ -60,7 +63,8 @@ class InstructionSelectorTest : public TestWithContext,
         : RawMachineAssembler(
               test->isolate(), new (test->zone()) Graph(test->zone()),
               MakeMachineSignature(test->zone(), return_type, parameter0_type,
-                                   parameter1_type, parameter2_type)),
+                                   parameter1_type, parameter2_type),
+              kMachPtr, MachineOperatorBuilder::kAllOptionalOps),
           test_(test) {}
 
     Stream Build(CpuFeature feature) {