[Utils] Use LLVMContext::MD_loop (NFC)

diff --git a/llvm/lib/Transforms/Utils/LoopSimplify.cpp b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
index 1b36a29..30a2550 100644 (file)
--- a/llvm/lib/Transforms/Utils/LoopSimplify.cpp
+++ b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
@@ -448,16 +448,15 @@ static BasicBlock *insertUniqueBackedgeBlock(Loop *L, BasicBlock *Preheader,
   // backedge blocks to jump to the BEBlock instead of the header.
   // If one of the backedges has llvm.loop metadata attached, we remove
   // it from the backedge and add it to BEBlock.
-  unsigned LoopMDKind = BEBlock->getContext().getMDKindID("llvm.loop");
   MDNode *LoopMD = nullptr;
   for (BasicBlock *BB : BackedgeBlocks) {
     Instruction *TI = BB->getTerminator();
     if (!LoopMD)
-      LoopMD = TI->getMetadata(LoopMDKind);
-    TI->setMetadata(LoopMDKind, nullptr);
+      LoopMD = TI->getMetadata(LLVMContext::MD_loop);
+    TI->setMetadata(LLVMContext::MD_loop, nullptr);
     TI->replaceSuccessorWith(Header, BEBlock);
   }
-  BEBlock->getTerminator()->setMetadata(LoopMDKind, LoopMD);
+  BEBlock->getTerminator()->setMetadata(LLVMContext::MD_loop, LoopMD);
 
   //===--- Update all analyses which we must preserve now -----------------===//