[DTU] Deprecate insertEdge*/deleteEdge*

Summary: This patch converts all existing `insertEdge*/deleteEdge*` to `applyUpdates` and marks `insertEdge*/deleteEdge*` as deprecated.

Reviewers: kuhar, brzycki

Reviewed By: kuhar, brzycki

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58443

llvm-svn: 354652
diff --git a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
index 6f49eae..0d6d102 100644
--- a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -721,7 +721,7 @@
   UncondBranch->eraseFromParent();
 
   if (DTU)
-    DTU->deleteEdge(Pred, BB);
+    DTU->applyUpdates({{DominatorTree::Delete, Pred, BB}});
 
   return cast<ReturnInst>(NewRet);
 }