[turbofan] Introduce node regions for protection from scheduling.

test/unittests/compiler/common-operator-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 <limits>
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 #include "src/compiler/operator-properties.h"
@@ skipping 340 matching lines @@
     TRACED_FOREACH(double, v2, kFloatValues) {
       const Operator* op1 = common()->NumberConstant(v1);
       const Operator* op2 = common()->NumberConstant(v2);
       EXPECT_EQ(bit_cast<uint64_t>(v1) == bit_cast<uint64_t>(v2),
                 op1->Equals(op2));
     }
   }
 }
 
 
-TEST_F(CommonOperatorTest, ValueEffect) {
-  TRACED_FOREACH(int, arguments, kArguments) {
-    const Operator* op = common()->ValueEffect(arguments);
-    EXPECT_EQ(arguments, op->ValueInputCount());
-    EXPECT_EQ(arguments, OperatorProperties::GetTotalInputCount(op));
-    EXPECT_EQ(0, op->ControlOutputCount());
-    EXPECT_EQ(1, op->EffectOutputCount());
-    EXPECT_EQ(0, op->ValueOutputCount());
-  }
+TEST_F(CommonOperatorTest, BeginRegion) {
+  const Operator* op = common()->BeginRegion();
+  EXPECT_EQ(1, op->EffectInputCount());
+  EXPECT_EQ(1, OperatorProperties::GetTotalInputCount(op));
+  EXPECT_EQ(0, op->ControlOutputCount());
+  EXPECT_EQ(1, op->EffectOutputCount());
+  EXPECT_EQ(0, op->ValueOutputCount());
 }
 
 
-TEST_F(CommonOperatorTest, Finish) {
-  TRACED_FOREACH(int, arguments, kArguments) {
-    const Operator* op = common()->Finish(arguments);
-    EXPECT_EQ(1, op->ValueInputCount());
-    EXPECT_EQ(arguments, op->EffectInputCount());
-    EXPECT_EQ(arguments + 1, OperatorProperties::GetTotalInputCount(op));
-    EXPECT_EQ(0, op->ControlOutputCount());
-    EXPECT_EQ(0, op->EffectOutputCount());
-    EXPECT_EQ(1, op->ValueOutputCount());
-  }
+TEST_F(CommonOperatorTest, FinishRegion) {
+  const Operator* op = common()->FinishRegion();
+  EXPECT_EQ(1, op->ValueInputCount());
+  EXPECT_EQ(1, op->EffectInputCount());
+  EXPECT_EQ(2, OperatorProperties::GetTotalInputCount(op));
+  EXPECT_EQ(0, op->ControlOutputCount());
+  EXPECT_EQ(1, op->EffectOutputCount());
+  EXPECT_EQ(1, op->ValueOutputCount());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8