Fix typed lowering of JSUnaryNot to work with graph reducer.

src/compiler/js-generic-lowering.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-stubs.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph-inl.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node-aux-data-inl.h"
@@ skipping 262 matching lines @@
 REPLACE_RUNTIME_CALL(JSCreateModuleContext, Runtime::kPushModuleContext)
 REPLACE_RUNTIME_CALL(JSCreateGlobalContext, Runtime::kAbort)
 #undef REPLACE_RUNTIME
 
 
 #define REPLACE_UNIMPLEMENTED(op)                  \
   Node* JSGenericLowering::Lower##op(Node* node) { \
     UNIMPLEMENTED();                               \
     return node;                                   \
   }
-REPLACE_UNIMPLEMENTED(JSToString)
 REPLACE_UNIMPLEMENTED(JSToName)
 REPLACE_UNIMPLEMENTED(JSYield)
 REPLACE_UNIMPLEMENTED(JSDebugger)
 #undef REPLACE_UNIMPLEMENTED
 
 
 static CallDescriptor::Flags FlagsForNode(Node* node) {
   CallDescriptor::Flags result = CallDescriptor::kNoFlags;
   if (OperatorProperties::HasFrameStateInput(node->op())) {
     result |= CallDescriptor::kNeedsFrameState;
@@ skipping 101 matching lines @@
 }
 
 
 Node* JSGenericLowering::LowerJSToBoolean(Node* node) {
   ToBooleanStub stub(isolate(), ToBooleanStub::RESULT_AS_ODDBALL);
   ReplaceWithStubCall(node, &stub, CallDescriptor::kPatchableCallSite);
   return node;
 }
 
 
+Node* JSGenericLowering::LowerJSToString(Node* node) {
+  ReplaceWithBuiltinCall(node, Builtins::TO_STRING, 1);
+  return node;
+}
+
+
 Node* JSGenericLowering::LowerJSToObject(Node* node) {
   ReplaceWithBuiltinCall(node, Builtins::TO_OBJECT, 1);
   return node;
 }
 
 
 Node* JSGenericLowering::LowerJSLoadProperty(Node* node) {
   KeyedLoadICStubShim stub(isolate());
   ReplaceWithStubCall(node, &stub, CallDescriptor::kPatchableCallSite);
   return node;
@@ skipping 124 matching lines @@
 Node* JSGenericLowering::LowerJSCallRuntime(Node* node) {
   Runtime::FunctionId function = OpParameter<Runtime::FunctionId>(node);
   int arity = OperatorProperties::GetValueInputCount(node->op());
   ReplaceWithRuntimeCall(node, function, arity);
   return node;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8