[turbofan] Make Float32Neg and Float64Neg mandatory operators.

src/compiler/machine-operator.h

Index: src/compiler/machine-operator.h
diff --git a/src/compiler/machine-operator.h b/src/compiler/machine-operator.h
index 5e00185337b4aab8662f9888506a85bcceb04aa8..06bf615dcc5b295fd99c2997e4291e7311bd0f6a 100644
--- a/src/compiler/machine-operator.h
+++ b/src/compiler/machine-operator.h
@@ -128,18 +128,16 @@ class MachineOperatorBuilder final : public ZoneObject {
     kWord64Popcnt = 1u << 19,
     kWord32ReverseBits = 1u << 20,
     kWord64ReverseBits = 1u << 21,
-    kFloat32Neg = 1u << 22,
-    kFloat64Neg = 1u << 23,
-    kWord32ReverseBytes = 1u << 24,
-    kWord64ReverseBytes = 1u << 25,
+    kWord32ReverseBytes = 1u << 22,
+    kWord64ReverseBytes = 1u << 23,
     kAllOptionalOps = kFloat32Max | kFloat32Min | kFloat64Max | kFloat64Min |
                       kFloat32RoundDown | kFloat64RoundDown | kFloat32RoundUp |
                       kFloat64RoundUp | kFloat32RoundTruncate |
                       kFloat64RoundTruncate | kFloat64RoundTiesAway |
                       kFloat32RoundTiesEven | kFloat64RoundTiesEven |
                       kWord32Ctz | kWord64Ctz | kWord32Popcnt | kWord64Popcnt |
-                      kWord32ReverseBits | kWord64ReverseBits | kFloat32Neg |
-                      kFloat64Neg | kWord32ReverseBytes | kWord64ReverseBytes
+                      kWord32ReverseBits | kWord64ReverseBits |
+                      kWord32ReverseBytes | kWord64ReverseBytes
   };
   typedef base::Flags<Flag, unsigned> Flags;
 
@@ -391,8 +389,8 @@ class MachineOperatorBuilder final : public ZoneObject {
   const OptionalOperator Float64RoundTiesEven();
 
   // Floating point neg.
-  const OptionalOperator Float32Neg();
-  const OptionalOperator Float64Neg();
+  const Operator* Float32Neg();
+  const Operator* Float64Neg();
 
   // Floating point trigonometric functions (double-precision).
   const Operator* Float64Acos();