[turbofan] Make an OptionalOperator for MachineOperatorBuilder.

src/compiler/machine-operator.cc

Index: src/compiler/machine-operator.cc
diff --git a/src/compiler/machine-operator.cc b/src/compiler/machine-operator.cc
index 07bcf3f77f1b208a2c7dc8c655151aede2d0b084..b7ddcdb339b1c398c5d8134487087d373e721efe 100644
--- a/src/compiler/machine-operator.cc
+++ b/src/compiler/machine-operator.cc
@@ -122,18 +122,13 @@ CheckedStoreRepresentation CheckedStoreRepresentationOf(Operator const* op) {
   V(Float32Sub, Operator::kNoProperties, 2, 0, 1)                             \
   V(Float32Mul, Operator::kCommutative, 2, 0, 1)                              \
   V(Float32Div, Operator::kNoProperties, 2, 0, 1)                             \
-  V(Float32Abs, Operator::kNoProperties, 1, 0, 1)                             \
   V(Float32Sqrt, Operator::kNoProperties, 1, 0, 1)                            \
   V(Float64Add, Operator::kCommutative, 2, 0, 1)                              \
   V(Float64Sub, Operator::kNoProperties, 2, 0, 1)                             \
   V(Float64Mul, Operator::kCommutative, 2, 0, 1)                              \
   V(Float64Div, Operator::kNoProperties, 2, 0, 1)                             \
   V(Float64Mod, Operator::kNoProperties, 2, 0, 1)                             \
-  V(Float64Abs, Operator::kNoProperties, 1, 0, 1)                             \
   V(Float64Sqrt, Operator::kNoProperties, 1, 0, 1)                            \
-  V(Float64RoundDown, Operator::kNoProperties, 1, 0, 1)                       \
-  V(Float64RoundTruncate, Operator::kNoProperties, 1, 0, 1)                   \
-  V(Float64RoundTiesAway, Operator::kNoProperties, 1, 0, 1)                   \
   V(Float32Equal, Operator::kCommutative, 2, 0, 1)                            \
   V(Float32LessThan, Operator::kNoProperties, 2, 0, 1)                        \
   V(Float32LessThanOrEqual, Operator::kNoProperties, 2, 0, 1)                 \
@@ -144,12 +139,19 @@ CheckedStoreRepresentation CheckedStoreRepresentationOf(Operator const* op) {
   V(Float64ExtractHighWord32, Operator::kNoProperties, 1, 0, 1)               \
   V(Float64InsertLowWord32, Operator::kNoProperties, 2, 0, 1)                 \
   V(Float64InsertHighWord32, Operator::kNoProperties, 2, 0, 1)                \
-  V(Float32Max, Operator::kNoProperties, 2, 0, 1)                             \
-  V(Float32Min, Operator::kNoProperties, 2, 0, 1)                             \
-  V(Float64Max, Operator::kNoProperties, 2, 0, 1)                             \
-  V(Float64Min, Operator::kNoProperties, 2, 0, 1)                             \
   V(LoadStackPointer, Operator::kNoProperties, 0, 0, 1)
 
+#define PURE_OPTIONAL_OP_LIST(V)                            \
+  V(Float32Max, Operator::kNoProperties, 2, 0, 1)           \
+  V(Float32Min, Operator::kNoProperties, 2, 0, 1)           \
+  V(Float64Max, Operator::kNoProperties, 2, 0, 1)           \
+  V(Float64Min, Operator::kNoProperties, 2, 0, 1)           \
+  V(Float32Abs, Operator::kNoProperties, 1, 0, 1)           \
+  V(Float64Abs, Operator::kNoProperties, 1, 0, 1)           \
+  V(Float64RoundDown, Operator::kNoProperties, 1, 0, 1)     \
+  V(Float64RoundTruncate, Operator::kNoProperties, 1, 0, 1) \
+  V(Float64RoundTiesAway, Operator::kNoProperties, 1, 0, 1)
+
 
 #define MACHINE_TYPE_LIST(V) \
   V(MachFloat32)             \
@@ -184,6 +186,7 @@ struct MachineOperatorGlobalCache {
   };                                                                           \
   Name##Operator k##Name;
   PURE_OP_LIST(PURE)
+  PURE_OPTIONAL_OP_LIST(PURE)
 #undef PURE
 
 #define LOAD(Type)                                                             \
@@ -255,6 +258,13 @@ MachineOperatorBuilder::MachineOperatorBuilder(Zone* zone, MachineType word,
 PURE_OP_LIST(PURE)
 #undef PURE
 
+#define PURE(Name, properties, value_input_count, control_input_count,     \
+             output_count)                                                 \
+  const OptionalOperator MachineOperatorBuilder::Name() {                  \
+    return OptionalOperator(flags_ & k##Name ? &cache_.k##Name : nullptr); \
+  }
+PURE_OPTIONAL_OP_LIST(PURE)
+#undef PURE
 
 const Operator* MachineOperatorBuilder::Load(LoadRepresentation rep) {
   switch (rep) {