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

src/compiler/bytecode-graph-builder.cc

 // Copyright 2015 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/bytecode-graph-builder.h"
 
 #include "src/compiler/linkage.h"
 #include "src/compiler/operator-properties.h"
 #include "src/interpreter/bytecode-array-iterator.h"
 #include "src/interpreter/bytecodes.h"
@@ skipping 941 matching lines @@
 
 
 void BytecodeGraphBuilder::VisitDec(
     const interpreter::BytecodeArrayIterator& iterator) {
   UNIMPLEMENTED();
 }
 
 
 void BytecodeGraphBuilder::VisitLogicalNot(
     const interpreter::BytecodeArrayIterator& iterator) {
-  Node* node =
-      NewNode(javascript()->UnaryNot(), environment()->LookupAccumulator());
+  Node* value =
+      NewNode(javascript()->ToBoolean(), environment()->LookupAccumulator());
+  Node* node = NewNode(common()->Select(kMachAnyTagged), value,
+                       jsgraph()->FalseConstant(), jsgraph()->TrueConstant());
   environment()->BindAccumulator(node);
 }
 
 
 void BytecodeGraphBuilder::VisitTypeOf(
     const interpreter::BytecodeArrayIterator& iterator) {
   Node* node =
       NewNode(javascript()->TypeOf(), environment()->LookupAccumulator());
   environment()->BindAccumulator(node);
 }
@@ skipping 334 matching lines @@
 
 void BytecodeGraphBuilder::UpdateControlDependencyToLeaveFunction(Node* exit) {
   if (environment()->IsMarkedAsUnreachable()) return;
   environment()->MarkAsUnreachable();
   exit_controls_.push_back(exit);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8