[turbofan] Address the useless overflow bit materialization.

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 374 matching lines @@
 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());
 }
 
+TEST_F(CommonOperatorTest, Projection) {
+  TRACED_FORRANGE(size_t, index, 0, 3) {
+    const Operator* op = common()->Projection(index);
+    EXPECT_EQ(index, ProjectionIndexOf(op));
+    EXPECT_EQ(1, op->ValueInputCount());
+    EXPECT_EQ(1, op->ControlInputCount());
+    EXPECT_EQ(2, OperatorProperties::GetTotalInputCount(op));
+    EXPECT_EQ(0, op->ControlOutputCount());
+    EXPECT_EQ(0, op->EffectOutputCount());
+    EXPECT_EQ(1, op->ValueOutputCount());
+  }
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8