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

1 files changed, 5 insertions, 5 deletions

diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index c1cf1f1..2f1d0c2 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -638,7 +638,7 @@ bool llvm::RecursivelyDeleteDeadPHINode(PHINode *PN,
     // won't prove fruitful.
     if (!Visited.insert(I).second) {
       // Break the cycle and delete the instruction and its operands.
-      I->replaceAllUsesWith(UndefValue::get(I->getType()));
+      I->replaceAllUsesWith(PoisonValue::get(I->getType()));
       (void)RecursivelyDeleteTriviallyDeadInstructions(I, TLI, MSSAU);
       return true;
     }
@@ -751,8 +751,8 @@ void llvm::MergeBasicBlockIntoOnlyPred(BasicBlock *DestBB,
   // If BB has single-entry PHI nodes, fold them.
   while (PHINode *PN = dyn_cast<PHINode>(DestBB->begin())) {
     Value *NewVal = PN->getIncomingValue(0);
-    // Replace self referencing PHI with undef, it must be dead.
-    if (NewVal == PN) NewVal = UndefValue::get(PN->getType());
+    // Replace self referencing PHI with poison, it must be dead.
+    if (NewVal == PN) NewVal = PoisonValue::get(PN->getType());
     PN->replaceAllUsesWith(NewVal);
     PN->eraseFromParent();
   }
@@ -2106,7 +2106,7 @@ llvm::removeAllNonTerminatorAndEHPadInstructions(BasicBlock *BB) {
     // Delete the next to last instruction.
     Instruction *Inst = &*--EndInst->getIterator();
     if (!Inst->use_empty() && !Inst->getType()->isTokenTy())
-      Inst->replaceAllUsesWith(UndefValue::get(Inst->getType()));
+      Inst->replaceAllUsesWith(PoisonValue::get(Inst->getType()));
     if (Inst->isEHPad() || Inst->getType()->isTokenTy()) {
       EndInst = Inst;
       continue;
@@ -2145,7 +2145,7 @@ unsigned llvm::changeToUnreachable(Instruction *I, bool PreserveLCSSA,
   BasicBlock::iterator BBI = I->getIterator(), BBE = BB->end();
   while (BBI != BBE) {
     if (!BBI->use_empty())
-      BBI->replaceAllUsesWith(UndefValue::get(BBI->getType()));
+      BBI->replaceAllUsesWith(PoisonValue::get(BBI->getType()));
     BB->getInstList().erase(BBI++);
     ++NumInstrsRemoved;
   }