[turbofan] Make an OptionalOperator for MachineOperatorBuilder.

src/compiler/machine-operator.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 "src/compiler/machine-operator.h"
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 
@@ skipping 104 matching lines @@
   V(ChangeInt32ToInt64, Operator::kNoProperties, 1, 0, 1)                     \
   V(ChangeUint32ToFloat64, Operator::kNoProperties, 1, 0, 1)                  \
   V(ChangeUint32ToUint64, Operator::kNoProperties, 1, 0, 1)                   \
   V(TruncateFloat64ToFloat32, Operator::kNoProperties, 1, 0, 1)               \
   V(TruncateFloat64ToInt32, Operator::kNoProperties, 1, 0, 1)                 \
   V(TruncateInt64ToInt32, Operator::kNoProperties, 1, 0, 1)                   \
   V(Float32Add, Operator::kCommutative, 2, 0, 1)                              \
   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)                 \
   V(Float64Equal, Operator::kCommutative, 2, 0, 1)                            \
   V(Float64LessThan, Operator::kNoProperties, 2, 0, 1)                        \
   V(Float64LessThanOrEqual, Operator::kNoProperties, 2, 0, 1)                 \
   V(Float64ExtractLowWord32, Operator::kNoProperties, 1, 0, 1)                \
   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)             \
   V(MachFloat64)             \
   V(MachInt8)                \
   V(MachUint8)               \
   V(MachInt16)               \
   V(MachUint16)              \
   V(MachInt32)               \
   V(MachUint32)              \
@@ skipping 14 matching lines @@
 #define PURE(Name, properties, value_input_count, control_input_count,         \
              output_count)                                                     \
   struct Name##Operator final : public Operator {                              \
     Name##Operator()                                                           \
         : Operator(IrOpcode::k##Name, Operator::kPure | properties, #Name,     \
                    value_input_count, 0, control_input_count, output_count, 0, \
                    0) {}                                                       \
   };                                                                           \
   Name##Operator k##Name;
   PURE_OP_LIST(PURE)
+  PURE_OPTIONAL_OP_LIST(PURE)
 #undef PURE
 
 #define LOAD(Type)                                                             \
   struct Load##Type##Operator final : public Operator1<LoadRepresentation> {   \
     Load##Type##Operator()                                                     \
         : Operator1<LoadRepresentation>(                                       \
               IrOpcode::kLoad, Operator::kNoThrow | Operator::kNoWrite,        \
               "Load", 2, 1, 1, 1, 1, 0, k##Type) {}                            \
   };                                                                           \
   struct CheckedLoad##Type##Operator final                                     \
@@ skipping 51 matching lines @@
   DCHECK(word == kRepWord32 || word == kRepWord64);
 }
 
 
 #define PURE(Name, properties, value_input_count, control_input_count, \
              output_count)                                             \
   const Operator* MachineOperatorBuilder::Name() { return &cache_.k##Name; }
 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) {
 #define LOAD(Type) \
   case k##Type:    \
     return &cache_.kLoad##Type;
     MACHINE_TYPE_LIST(LOAD)
 #undef LOAD
     default:
       break;
@@ skipping 60 matching lines @@
   }
   // Uncached.
   return new (zone_) Operator1<CheckedStoreRepresentation>(
       IrOpcode::kCheckedStore, Operator::kNoRead | Operator::kNoThrow,
       "CheckedStore", 4, 1, 1, 0, 1, 0, rep);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8