[turbofan] Desugar JSUnaryNot(x) to Select(x, false, true).

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index c25a30230ecc19e2f6aa828bb6a4f86cfe8dd7c9..1620c790c98a8e98a1cafffaa8eb94a9479b3413 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -255,7 +255,6 @@ class Typer::Visitor : public Reducer {
   JS_SIMPLE_BINOP_LIST(DECLARE_METHOD)
 #undef DECLARE_METHOD
 
-  static Type* JSUnaryNotTyper(Type*, Typer*);
   static Type* JSTypeOfTyper(Type*, Typer*);
   static Type* JSLoadPropertyTyper(Type*, Type*, Typer*);
   static Type* JSCallFunctionTyper(Type*, Typer*);
@@ -1143,16 +1142,6 @@ Type* Typer::Visitor::JSModulusTyper(Type* lhs, Type* rhs, Typer* t) {
 // JS unary operators.
 
 
-Type* Typer::Visitor::JSUnaryNotTyper(Type* type, Typer* t) {
-  return Invert(ToBoolean(type, t), t);
-}
-
-
-Type* Typer::Visitor::TypeJSUnaryNot(Node* node) {
-  return TypeUnaryOp(node, JSUnaryNotTyper);
-}
-
-
 Type* Typer::Visitor::JSTypeOfTyper(Type* type, Typer* t) {
   Factory* const f = t->isolate()->factory();
   if (type->Is(Type::Boolean())) {