[NFC] Switch a few uses of undef to poison as placeholders for unreachable code

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
index 4119d8c..349063d 100644
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -602,10 +602,10 @@ void llvm::deleteDeadLoop(Loop *L, DominatorTree *DT, ScalarEvolution *SE,
     // loop will be already eliminated and we have less work to do but according
     // to API doc of User::dropAllReferences only valid operation after dropping
     // references, is deletion. So let's substitute all usages of
-    // instruction from the loop with undef value of corresponding type first.
+    // instruction from the loop with poison value of corresponding type first.
     for (auto *Block : L->blocks())
       for (Instruction &I : *Block) {
-        auto *Undef = UndefValue::get(I.getType());
+        auto *Poison = PoisonValue::get(I.getType());
         for (Use &U : llvm::make_early_inc_range(I.uses())) {
           if (auto *Usr = dyn_cast<Instruction>(U.getUser()))
             if (L->contains(Usr->getParent()))
@@ -615,7 +615,7 @@ void llvm::deleteDeadLoop(Loop *L, DominatorTree *DT, ScalarEvolution *SE,
           if (DT)
             assert(!DT->isReachableFromEntry(U) &&
                    "Unexpected user in reachable block");
-          U.set(Undef);
+          U.set(Poison);
         }
         auto *DVI = dyn_cast<DbgVariableIntrinsic>(&I);
         if (!DVI)