[llvm] 7d33d47 - [LoopFuse] Use poison instead of undef as placeholder for phi entry of unreachable predecessor [NFC]

[Nuno Lopes via llvm-commits]

Author: Nuno Lopes
Date: 2024-06-30T11:59:58+01:00
New Revision: 7d33d4720f85fa2df7c1307bcc185017b6e4dd25

URL: https://github.com/llvm/llvm-project/commit/7d33d4720f85fa2df7c1307bcc185017b6e4dd25
DIFF: https://github.com/llvm/llvm-project/commit/7d33d4720f85fa2df7c1307bcc185017b6e4dd25.diff

LOG: [LoopFuse] Use poison instead of undef as placeholder for phi entry of unreachable predecessor [NFC]

Added: 
    

Modified: 
    llvm/lib/Transforms/Scalar/LoopFuse.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Scalar/LoopFuse.cpp b/llvm/lib/Transforms/Scalar/LoopFuse.cpp
index 22ae970a52ea7..8512b2accbe7c 100644
--- a/llvm/lib/Transforms/Scalar/LoopFuse.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopFuse.cpp
@@ -1684,7 +1684,7 @@ struct LoopFuser {
           PHINode::Create(LCV->getType(), 2, LCPHI->getName() + ".afterFC0");
       L1HeaderPHI->insertBefore(L1HeaderIP);
       L1HeaderPHI->addIncoming(LCV, FC0.Latch);
-      L1HeaderPHI->addIncoming(UndefValue::get(LCV->getType()),
+      L1HeaderPHI->addIncoming(PoisonValue::get(LCV->getType()),
                                FC0.ExitingBlock);
 
       LCPHI->setIncomingValue(L1LatchBBIdx, L1HeaderPHI);