[turbofan] Make Float32Neg and Float64Neg mandatory operators.

src/compiler/raw-machine-assembler.h

 // 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.
 
 #ifndef V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 
 #include "src/assembler.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 425 matching lines @@
   Node* Float32SubPreserveNan(Node* a, Node* b) {
     return AddNode(machine()->Float32SubPreserveNan(), a, b);
   }
   Node* Float32Mul(Node* a, Node* b) {
     return AddNode(machine()->Float32Mul(), a, b);
   }
   Node* Float32Div(Node* a, Node* b) {
     return AddNode(machine()->Float32Div(), a, b);
   }
   Node* Float32Abs(Node* a) { return AddNode(machine()->Float32Abs(), a); }
-  Node* Float32Neg(Node* a) { return Float32Sub(Float32Constant(-0.0f), a); }
+  Node* Float32Neg(Node* a) { return AddNode(machine()->Float32Neg(), a); }
   Node* Float32Sqrt(Node* a) { return AddNode(machine()->Float32Sqrt(), a); }
   Node* Float32Equal(Node* a, Node* b) {
     return AddNode(machine()->Float32Equal(), a, b);
   }
   Node* Float32NotEqual(Node* a, Node* b) {
     return Word32BinaryNot(Float32Equal(a, b));
   }
   Node* Float32LessThan(Node* a, Node* b) {
     return AddNode(machine()->Float32LessThan(), a, b);
   }
@@ skipping 23 matching lines @@
   Node* Float64Mod(Node* a, Node* b) {
     return AddNode(machine()->Float64Mod(), a, b);
   }
   Node* Float64Max(Node* a, Node* b) {
     return AddNode(machine()->Float64Max(), a, b);
   }
   Node* Float64Min(Node* a, Node* b) {
     return AddNode(machine()->Float64Min(), a, b);
   }
   Node* Float64Abs(Node* a) { return AddNode(machine()->Float64Abs(), a); }
-  Node* Float64Neg(Node* a) { return Float64Sub(Float64Constant(-0.0), a); }
+  Node* Float64Neg(Node* a) { return AddNode(machine()->Float64Neg(), a); }
   Node* Float64Acos(Node* a) { return AddNode(machine()->Float64Acos(), a); }
   Node* Float64Acosh(Node* a) { return AddNode(machine()->Float64Acosh(), a); }
   Node* Float64Asin(Node* a) { return AddNode(machine()->Float64Asin(), a); }
   Node* Float64Asinh(Node* a) { return AddNode(machine()->Float64Asinh(), a); }
   Node* Float64Atan(Node* a) { return AddNode(machine()->Float64Atan(), a); }
   Node* Float64Atanh(Node* a) { return AddNode(machine()->Float64Atanh(), a); }
   Node* Float64Atan2(Node* a, Node* b) {
     return AddNode(machine()->Float64Atan2(), a, b);
   }
   Node* Float64Cbrt(Node* a) { return AddNode(machine()->Float64Cbrt(), a); }
@@ skipping 331 matching lines @@
   bool deferred_;
   friend class RawMachineAssembler;
   DISALLOW_COPY_AND_ASSIGN(RawMachineLabel);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_