[builtins] Introduce proper Float64Tan operator.

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 b35cfaa29ebd9117f5a14bd93017954bf88dc076..748d9c3349fbf304643956f4fddafe4efc3939ed 100644
--- a/src/compiler/machine-operator.cc
+++ b/src/compiler/machine-operator.cc
@@ -174,6 +174,7 @@ MachineRepresentation AtomicStoreRepresentationOf(Operator const* op) {
   V(Float64Mod, Operator::kNoProperties, 2, 0, 1)                             \
   V(Float64Sin, Operator::kNoProperties, 1, 0, 1)                             \
   V(Float64Sqrt, Operator::kNoProperties, 1, 0, 1)                            \
+  V(Float64Tan, 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)                 \