[turbofan] Don't connect regular Phis into the effect chain.

src/compiler/effect-control-linearizer.cc

Index: src/compiler/effect-control-linearizer.cc
diff --git a/src/compiler/effect-control-linearizer.cc b/src/compiler/effect-control-linearizer.cc
index 9e35e51955e908c026f0c2cda34b17cc9dd4fd08..aeb5926759fc7a45a1703965a5643ba215e66c79 100644
--- a/src/compiler/effect-control-linearizer.cc
+++ b/src/compiler/effect-control-linearizer.cc
@@ -276,8 +276,10 @@ void TryCloneBranch(Node* node, BasicBlock* block, Graph* graph,
         edge.UpdateTo((control == matcher.IfTrue()) ? phi_true : phi_false);
       }
     }
-    true_block_data->current_effect = phi_true;
-    false_block_data->current_effect = phi_false;
+    if (phi->opcode() == IrOpcode::kEffectPhi) {
+      true_block_data->current_effect = phi_true;
+      false_block_data->current_effect = phi_false;
+    }
     phi->Kill();
   }
   // Fix up IfTrue and IfFalse and kill all dead nodes.