[turbofan] Fix verification of duplicate projections.

src/compiler/verifier.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/verifier.h"
 
 #include <algorithm>
 #include <deque>
 #include <queue>
 #include <sstream>
@@ skipping 1427 matching lines @@
   AllNodes all(&zone, graph);
   for (Node* node : all.reachable) visitor.Check(node);
 
   // Check the uniqueness of projections.
   for (Node* proj : all.reachable) {
     if (proj->opcode() != IrOpcode::kProjection) continue;
     Node* node = proj->InputAt(0);
     for (Node* other : node->uses()) {
       if (all.IsLive(other) && other != proj &&
           other->opcode() == IrOpcode::kProjection &&
+          other->InputAt(0) == node &&
           ProjectionIndexOf(other->op()) == ProjectionIndexOf(proj->op())) {
         V8_Fatal(__FILE__, __LINE__,
                  "Node #%d:%s has duplicate projections #%d and #%d",
                  node->id(), node->op()->mnemonic(), proj->id(), other->id());
       }
     }
   }
 }
 
 
@@ skipping 288 matching lines @@
          replacement->op()->EffectOutputCount() > 0);
   DCHECK(!NodeProperties::IsFrameStateEdge(edge) ||
          replacement->opcode() == IrOpcode::kFrameState);
 }
 
 #endif  // DEBUG
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8