[turbofan] Introduce node regions for protection from scheduling.

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 1048 matching lines @@
   if (!FLAG_turbo_allocate) return;
   Node* const closure = Parameter(Type::Any());
   Node* const context = Parameter(Type::Any());
   Node* const effect = graph()->start();
   Node* const control = graph()->start();
   Reduction const r =
       Reduce(graph()->NewNode(javascript()->CreateFunctionContext(8), closure,
                               context, effect, control));
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(r.replacement(),
-              IsFinish(IsAllocate(IsNumberConstant(Context::SizeFor(
-                                      8 + Context::MIN_CONTEXT_SLOTS)),
-                                  effect, control),
-                       _));
+              IsFinishRegion(IsAllocate(IsNumberConstant(Context::SizeFor(
+                                            8 + Context::MIN_CONTEXT_SLOTS)),
+                                        IsBeginRegion(effect), control),
+                             _));
 }
 
 
 TEST_F(JSTypedLoweringTest, JSCreateFunctionContextViaStub) {
   Node* const closure = Parameter(Type::Any());
   Node* const context = Parameter(Type::Any());
   Node* const effect = graph()->start();
   Node* const control = graph()->start();
   Reduction const r =
       Reduce(graph()->NewNode(javascript()->CreateFunctionContext(32), closure,
@@ skipping 16 matching lines @@
   Node* const closure = Parameter(Type::Any());
   Node* const context = Parameter(Type::Any());
   Node* const frame_state = EmptyFrameState();
   Node* const effect = graph()->start();
   Node* const control = graph()->start();
   Reduction r =
       Reduce(graph()->NewNode(javascript()->CreateWithContext(), object,
                               closure, context, frame_state, effect, control));
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(r.replacement(),
-              IsFinish(IsAllocate(IsNumberConstant(Context::SizeFor(
-                                      Context::MIN_CONTEXT_SLOTS)),
-                                  effect, control),
-                       _));
+              IsFinishRegion(IsAllocate(IsNumberConstant(Context::SizeFor(
+                                            Context::MIN_CONTEXT_SLOTS)),
+                                        IsBeginRegion(effect), control),
+                             _));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8