[turbofan] Properly optimize JSToBoolean with Number inputs.

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/code-factory.h"
 #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"
@@ skipping 266 matching lines @@
 TEST_F(JSTypedLoweringTest, JSToBooleanWithOrderedNumber) {
   Node* input = Parameter(Type::OrderedNumber(), 0);
   Node* context = Parameter(Type::Any(), 1);
   Reduction r = Reduce(graph()->NewNode(
       javascript()->ToBoolean(ToBooleanHint::kAny), input, context));
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(r.replacement(),
               IsBooleanNot(IsNumberEqual(input, IsNumberConstant(0.0))));
 }
 
+TEST_F(JSTypedLoweringTest, JSToBooleanWithNumber) {
+  Node* input = Parameter(Type::Number(), 0);
+  Node* context = Parameter(Type::Any(), 1);
+  Reduction r = Reduce(graph()->NewNode(
+      javascript()->ToBoolean(ToBooleanHint::kAny), input, context));
+  ASSERT_TRUE(r.Changed());
+  EXPECT_THAT(r.replacement(),
+              IsNumberLessThan(IsNumberConstant(0.0), IsNumberAbs(input)));
+}
 
 TEST_F(JSTypedLoweringTest, JSToBooleanWithString) {
   Node* input = Parameter(Type::String(), 0);
   Node* context = Parameter(Type::Any(), 1);
   Reduction r = Reduce(graph()->NewNode(
       javascript()->ToBoolean(ToBooleanHint::kAny), input, context));
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(
       r.replacement(),
       IsNumberLessThan(IsNumberConstant(0.0),
@@ skipping 641 matching lines @@
   Node* dummy = graph()->NewNode(javascript()->ToObject(), instanceOf, context,
                                  frame_state, effect, control);
   Reduction r = Reduce(instanceOf);
   ASSERT_FALSE(r.Changed());
   ASSERT_EQ(instanceOf, dummy->InputAt(0));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8