[turbofan] Fix scheduler test for Loop/Terminate nodes.

test/unittests/compiler/scheduler-unittest.cc

 // Copyright 2015 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/access-builder.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/graph-visualizer.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node.h"
@@ skipping 1106 matching lines @@
 }
 
 
 TARGET_TEST_F(SchedulerTest, Terminate) {
   Node* start = graph()->NewNode(common()->Start(1));
   graph()->SetStart(start);
 
   Node* loop = graph()->NewNode(common()->Loop(2), start, start);
   loop->ReplaceInput(1, loop);  // self loop, NTL.
 
-  Node* effect = graph()->NewNode(common()->EffectPhi(1), start, loop);
+  Node* effect = graph()->NewNode(common()->EffectPhi(2), start, start, loop);
+  effect->ReplaceInput(1, effect);  // self loop.
 
   Node* terminate = graph()->NewNode(common()->Terminate(), effect, loop);
-  effect->ReplaceInput(1, terminate);
-
   Node* end = graph()->NewNode(common()->End(1), terminate);
-
   graph()->SetEnd(end);
 
   Schedule* schedule = ComputeAndVerifySchedule(6);
   BasicBlock* block = schedule->block(loop);
   EXPECT_EQ(block, schedule->block(effect));
   EXPECT_GE(block->rpo_number(), 0);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8