[IR] Add BasicBlock::isEntryBlock() (NFC)

This is a recurring and somewhat awkward pattern. Add a helper
method for it.

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
index 5690200..e3cf643 100644
--- a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -887,7 +887,7 @@ static void UpdateAnalysisInformation(BasicBlock *OldBB, BasicBlock *NewBB,
   if (DTU) {
     // Recalculation of DomTree is needed when updating a forward DomTree and
     // the Entry BB is replaced.
-    if (NewBB == &NewBB->getParent()->getEntryBlock() && DTU->hasDomTree()) {
+    if (NewBB->isEntryBlock() && DTU->hasDomTree()) {
       // The entry block was removed and there is no external interface for
       // the dominator tree to be notified of this change. In this corner-case
       // we recalculate the entire tree.
@@ -906,7 +906,7 @@ static void UpdateAnalysisInformation(BasicBlock *OldBB, BasicBlock *NewBB,
     }
   } else if (DT) {
     if (OldBB == DT->getRootNode()->getBlock()) {
-      assert(NewBB == &NewBB->getParent()->getEntryBlock());
+      assert(NewBB->isEntryBlock());
       DT->setNewRoot(NewBB);
     } else {
       // Split block expects NewBB to have a non-empty set of predecessors.