[turbofan] Avoid generating dead BooleanNot nodes in typed lowering.

test/unittests/compiler/js-typed-lowering-unittest.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node-properties.h"
@@ skipping 101 matching lines @@
 TEST_F(JSTypedLoweringTest, JSUnaryNotWithBoolean) {
   Node* input = Parameter(Type::Boolean(), 0);
   Node* context = Parameter(Type::Any(), 1);
   Reduction r =
       Reduce(graph()->NewNode(javascript()->UnaryNot(), input, context));
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(r.replacement(), IsBooleanNot(input));
 }
 
 
+TEST_F(JSTypedLoweringTest, JSUnaryNotWithOrderedNumber) {
+  Node* input = Parameter(Type::OrderedNumber(), 0);
+  Node* context = Parameter(Type::Any(), 1);
+  Reduction r =
+      Reduce(graph()->NewNode(javascript()->UnaryNot(), input, context));
+  ASSERT_TRUE(r.Changed());
+  EXPECT_THAT(r.replacement(), IsNumberEqual(input, IsNumberConstant(0)));
+}
+
+
 TEST_F(JSTypedLoweringTest, JSUnaryNotWithFalsish) {
   Node* input = Parameter(
       Type::Union(
           Type::MinusZero(),
           Type::Union(
               Type::NaN(),
               Type::Union(
                   Type::Null(),
                   Type::Union(
                       Type::Undefined(),
@@ skipping 665 matching lines @@
           IsStoreElement(
               access, IsIntPtrConstant(bit_cast<intptr_t>(&backing_store[0])),
               key, value, effect, control));
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8