[LoopInfo] Add getOutermostLoop() (NFC)

This is a recurring pattern, add an API function for it.

1 files changed, 1 insertions, 7 deletions

diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
index c5582fb..965b35a 100644
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -686,18 +686,12 @@ void llvm::deleteDeadLoop(Loop *L, DominatorTree *DT, ScalarEvolution *SE,
   }
 }
 
-static Loop *getOutermostLoop(Loop *L) {
-  while (Loop *Parent = L->getParentLoop())
-    L = Parent;
-  return L;
-}
-
 void llvm::breakLoopBackedge(Loop *L, DominatorTree &DT, ScalarEvolution &SE,
                              LoopInfo &LI, MemorySSA *MSSA) {
   auto *Latch = L->getLoopLatch();
   assert(Latch && "multiple latches not yet supported");
   auto *Header = L->getHeader();
-  Loop *OutermostLoop = getOutermostLoop(L);
+  Loop *OutermostLoop = L->getOutermostLoop();
 
   SE.forgetLoop(L);