[turbofan] Make an OptionalOperator for MachineOperatorBuilder.

test/cctest/compiler/test-run-machops.cc

Index: test/cctest/compiler/test-run-machops.cc
diff --git a/test/cctest/compiler/test-run-machops.cc b/test/cctest/compiler/test-run-machops.cc
index 147bc85418f409fc3b6a04ae1cf46b9089520919..6b8d22c5545bcccff697b87c3041bfa99984f77d 100644
--- a/test/cctest/compiler/test-run-machops.cc
+++ b/test/cctest/compiler/test-run-machops.cc
@@ -4950,7 +4950,7 @@ TEST(RunFloat32Abs) {
   float input = -1.0;
   float result = 0.0;
   RawMachineAssemblerTester<int32_t> m;
-  if (!m.machine()->HasFloat32Abs()) return;
+  if (!m.machine()->Float32Abs().supported()) return;
   m.StoreToPointer(&result, kMachFloat32,
                    m.Float32Abs(m.LoadFromPointer(&input, kMachFloat32)));
   m.Return(m.Int32Constant(0));
@@ -4967,7 +4967,7 @@ TEST(RunFloat64Abs) {
   double input = -1.0;
   double result = 0.0;
   RawMachineAssemblerTester<int32_t> m;
-  if (!m.machine()->HasFloat64Abs()) return;
+  if (!m.machine()->Float64Abs().supported()) return;
   m.StoreToPointer(&result, kMachFloat64,
                    m.Float64Abs(m.LoadFromPointer(&input, kMachFloat64)));
   m.Return(m.Int32Constant(0));
@@ -5082,7 +5082,7 @@ TEST(RunFloat64RoundDown1) {
   double input = -1.0;
   double result = 0.0;
   RawMachineAssemblerTester<int32_t> m;
-  if (!m.machine()->HasFloat64RoundDown()) return;
+  if (!m.machine()->Float64RoundDown().supported()) return;
   m.StoreToPointer(&result, kMachFloat64,
                    m.Float64RoundDown(m.LoadFromPointer(&input, kMachFloat64)));
   m.Return(m.Int32Constant(0));
@@ -5099,7 +5099,7 @@ TEST(RunFloat64RoundDown2) {
   double input = -1.0;
   double result = 0.0;
   RawMachineAssemblerTester<int32_t> m;
-  if (!m.machine()->HasFloat64RoundDown()) return;
+  if (!m.machine()->Float64RoundDown().supported()) return;
   m.StoreToPointer(&result, kMachFloat64,
                    m.Float64Sub(m.Float64Constant(-0.0),
                                 m.Float64RoundDown(m.Float64Sub(
@@ -5119,7 +5119,7 @@ TEST(RunFloat64RoundTruncate) {
   double input = -1.0;
   double result = 0.0;
   RawMachineAssemblerTester<int32_t> m;
-  if (!m.machine()->HasFloat64RoundTruncate()) return;
+  if (!m.machine()->Float64RoundTruncate().supported()) return;
   m.StoreToPointer(
       &result, kMachFloat64,
       m.Float64RoundTruncate(m.LoadFromPointer(&input, kMachFloat64)));
@@ -5137,7 +5137,7 @@ TEST(RunFloat64RoundTiesAway) {
   double input = -1.0;
   double result = 0.0;
   RawMachineAssemblerTester<int32_t> m;
-  if (!m.machine()->HasFloat64RoundTiesAway()) return;
+  if (!m.machine()->Float64RoundTiesAway().supported()) return;
   m.StoreToPointer(
       &result, kMachFloat64,
       m.Float64RoundTiesAway(m.LoadFromPointer(&input, kMachFloat64)));