[turbofan] Float32Abs and Float64Abs are supported by all backends.

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 8a16fcaae98a2614b33f7da284ea103664124262..141586965b0d249a6a3f362765c4448d504d9550 100644
--- a/src/compiler/machine-operator.h
+++ b/src/compiler/machine-operator.h
@@ -74,18 +74,16 @@ class MachineOperatorBuilder final : public ZoneObject {
   // for operations that are unsupported by some back-ends.
   enum Flag {
     kNoFlags = 0u,
-    kFloat32Abs = 1u << 0,
-    kFloat32Max = 1u << 1,
-    kFloat32Min = 1u << 2,
-    kFloat64Abs = 1u << 3,
-    kFloat64Max = 1u << 4,
-    kFloat64Min = 1u << 5,
-    kFloat64RoundDown = 1u << 6,
-    kFloat64RoundTruncate = 1u << 7,
-    kFloat64RoundTiesAway = 1u << 8,
-    kInt32DivIsSafe = 1u << 9,
-    kUint32DivIsSafe = 1u << 10,
-    kWord32ShiftIsSafe = 1u << 11
+    kFloat32Max = 1u << 0,
+    kFloat32Min = 1u << 1,
+    kFloat64Max = 1u << 2,
+    kFloat64Min = 1u << 3,
+    kFloat64RoundDown = 1u << 4,
+    kFloat64RoundTruncate = 1u << 5,
+    kFloat64RoundTiesAway = 1u << 6,
+    kInt32DivIsSafe = 1u << 7,
+    kUint32DivIsSafe = 1u << 8,
+    kWord32ShiftIsSafe = 1u << 9
   };
   typedef base::Flags<Flag, unsigned> Flags;
 
@@ -201,11 +199,9 @@ class MachineOperatorBuilder final : public ZoneObject {
 
   // Floating point abs complying to IEEE 754 (single-precision).
   const Operator* Float32Abs();
-  bool HasFloat32Abs() const { return flags_ & kFloat32Abs; }
 
   // Floating point abs complying to IEEE 754 (double-precision).
   const Operator* Float64Abs();
-  bool HasFloat64Abs() const { return flags_ & kFloat64Abs; }
 
   // Floating point rounding.
   const Operator* Float64RoundDown();