[turbofan] Better handling of inserted split-edge blocks

src/compiler/schedule.cc

Index: src/compiler/schedule.cc
diff --git a/src/compiler/schedule.cc b/src/compiler/schedule.cc
index 6bd1a17be0603476585442eaea760ce2b1ad3eb4..eb3dda8c260547ed7f0981d4c3dcc90d98b74a6b 100644
--- a/src/compiler/schedule.cc
+++ b/src/compiler/schedule.cc
@@ -344,7 +344,7 @@ void Schedule::EnsureSplitEdgeForm(BasicBlock* block) {
       split_edge_block->set_control(BasicBlock::kGoto);
       split_edge_block->successors().push_back(block);
       split_edge_block->predecessors().push_back(pred);
-      split_edge_block->set_deferred(pred->deferred());
+      split_edge_block->set_deferred(block->deferred());
       *current_pred = split_edge_block;
       // Find a corresponding successor in the previous block, replace it
       // with the split edge block... but only do it once, since we only