[turbofan] Add new ControlEffect and Finish operators.

src/compiler/common-operator.h

Index: src/compiler/common-operator.h
diff --git a/src/compiler/common-operator.h b/src/compiler/common-operator.h
index 3b581ae0cd2c023e8f733eaf265d3979efbd3021..2c5f1b66fc7dcc3d2174918c0aa8387d5954fa84 100644
--- a/src/compiler/common-operator.h
+++ b/src/compiler/common-operator.h
@@ -130,6 +130,15 @@ class CommonOperatorBuilder {
     return new (zone_) Operator1<int>(IrOpcode::kEffectPhi, Operator::kPure, 0,
                                       0, "EffectPhi", arguments);
   }
+  Operator* ControlEffect() {
+    return new (zone_) SimpleOperator(IrOpcode::kControlEffect, Operator::kPure,
+                                      0, 0, "ControlEffect");
+  }
+  Operator* Finish(int arguments) {
+    DCHECK(arguments > 0);  // Disallow empty finishes.
+    return new (zone_) Operator1<int>(IrOpcode::kFinish, Operator::kPure, 1, 1,
+                                      "Finish", arguments);
+  }
   Operator* StateValues(int arguments) {
     return new (zone_) Operator1<int>(IrOpcode::kStateValues, Operator::kPure,
                                       arguments, 1, "StateValues", arguments);