[turbofan] Introduce node regions for protection from scheduling.

src/compiler/typer.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/typer.h"
 
 #include "src/base/flags.h"
 #include "src/base/lazy-instance.h"
 #include "src/bootstrapper.h"
 #include "src/compiler/common-operator.h"
@@ skipping 536 matching lines @@
   return nullptr;
 }
 
 
 Type* Typer::Visitor::TypeEffectSet(Node* node) {
   UNREACHABLE();
   return nullptr;
 }
 
 
-Type* Typer::Visitor::TypeValueEffect(Node* node) {
+Type* Typer::Visitor::TypeBeginRegion(Node* node) {
   UNREACHABLE();
   return nullptr;
 }
 
 
-Type* Typer::Visitor::TypeFinish(Node* node) { return Operand(node, 0); }
+Type* Typer::Visitor::TypeFinishRegion(Node* node) { return Operand(node, 0); }
 
 
 Type* Typer::Visitor::TypeFrameState(Node* node) {
   // TODO(rossberg): Ideally FrameState wouldn't have a value output.
   return Type::Internal(zone());
 }
 
 
 Type* Typer::Visitor::TypeStateValues(Node* node) {
   return Type::Internal(zone());
@@ skipping 1523 matching lines @@
   }
   if (Type::IsInteger(*value)) {
     return Type::Range(value->Number(), value->Number(), zone());
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8