[turbofan] mark Float64(Max|Min) as associative and commutative.

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 f2b540665b319bb3624deb9de51bb94851ad682e..5ffc9bbcd8ebf5dee5c7d5249513d9cecfdc9042 100644
--- a/src/compiler/machine-operator.cc
+++ b/src/compiler/machine-operator.cc
@@ -181,8 +181,8 @@ MachineRepresentation AtomicStoreRepresentationOf(Operator const* op) {
   V(Float64Log1p, Operator::kNoProperties, 1, 0, 1)                          \
   V(Float64Log2, Operator::kNoProperties, 1, 0, 1)                           \
   V(Float64Log10, Operator::kNoProperties, 1, 0, 1)                          \
-  V(Float64Max, Operator::kNoProperties, 2, 0, 1)                            \
-  V(Float64Min, Operator::kNoProperties, 2, 0, 1)                            \
+  V(Float64Max, Operator::kAssociative | Operator::kCommutative, 2, 0, 1)    \
+  V(Float64Min, Operator::kAssociative | Operator::kCommutative, 2, 0, 1)    \
   V(Float64Neg, Operator::kNoProperties, 1, 0, 1)                            \
   V(Float64Add, Operator::kCommutative, 2, 0, 1)                             \
   V(Float64Sub, Operator::kNoProperties, 2, 0, 1)                            \