[turbofan] Introduce node regions for protection from scheduling.

src/compiler/change-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/compiler/change-lowering.h"
 
 #include "src/code-factory.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 48 matching lines @@
   return jsgraph()->IntPtrConstant(kSmiShiftSize + kSmiTagSize);
 }
 
 
 Node* ChangeLowering::AllocateHeapNumberWithValue(Node* value, Node* control) {
   // The AllocateHeapNumberStub does not use the context, so we can safely pass
   // in Smi zero here.
   Callable callable = CodeFactory::AllocateHeapNumber(isolate());
   Node* target = jsgraph()->HeapConstant(callable.code());
   Node* context = jsgraph()->NoContextConstant();
-  Node* effect = graph()->NewNode(common()->ValueEffect(1), value);
+  Node* effect = graph()->NewNode(common()->BeginRegion(), graph()->start());
   if (!allocate_heap_number_operator_.is_set()) {
     CallDescriptor* descriptor = Linkage::GetStubCallDescriptor(
         isolate(), jsgraph()->zone(), callable.descriptor(), 0,
         CallDescriptor::kNoFlags, Operator::kNoThrow);
     allocate_heap_number_operator_.set(common()->Call(descriptor));
   }
   Node* heap_number = graph()->NewNode(allocate_heap_number_operator_.get(),
                                        target, context, effect, control);
   Node* store = graph()->NewNode(
       machine()->Store(StoreRepresentation(kMachFloat64, kNoWriteBarrier)),
       heap_number, HeapNumberValueIndexConstant(), value, heap_number, control);
-  return graph()->NewNode(common()->Finish(1), heap_number, store);
+  return graph()->NewNode(common()->FinishRegion(), heap_number, store);
 }
 
 
 Node* ChangeLowering::ChangeInt32ToFloat64(Node* value) {
   return graph()->NewNode(machine()->ChangeInt32ToFloat64(), value);
 }
 
 
 Node* ChangeLowering::ChangeInt32ToSmi(Node* value) {
   if (machine()->Is64()) {
@@ skipping 255 matching lines @@
 }
 
 
 MachineOperatorBuilder* ChangeLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8