[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

1 files changed, 3 insertions, 4 deletions

diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
index 44f47bf71ca..c3a02685244 100644
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -535,10 +535,9 @@ void llvm::deleteDeadLoop(Loop *L, DominatorTree *DT = nullptr,
   DomTreeUpdater DTU(DT, DomTreeUpdater::UpdateStrategy::Eager);
   if (DT) {
     // Update the dominator tree by informing it about the new edge from the
-    // preheader to the exit.
-    DTU.insertEdge(Preheader, ExitBlock);
-    // Inform the dominator tree about the removed edge.
-    DTU.deleteEdge(Preheader, L->getHeader());
+    // preheader to the exit and the removed edge.
+    DTU.applyUpdates({{DominatorTree::Insert, Preheader, ExitBlock},
+                      {DominatorTree::Delete, Preheader, L->getHeader()}});
   }
 
   // Use a map to unique and a vector to guarantee deterministic ordering.