[llvm] 35eef9f - [Reassociate] Use poison instead of undef for dummy operands (NFCI)

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2024-06-25T12:44:11+02:00
New Revision: 35eef9f97f077a7cfa2beb9df857aa1713e4faa6

URL: https://github.com/llvm/llvm-project/commit/35eef9f97f077a7cfa2beb9df857aa1713e4faa6
DIFF: https://github.com/llvm/llvm-project/commit/35eef9f97f077a7cfa2beb9df857aa1713e4faa6.diff

LOG: [Reassociate] Use poison instead of undef for dummy operands (NFCI)

These will be replaced later.

Added: 
    

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

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Scalar/Reassociate.cpp b/llvm/lib/Transforms/Scalar/Reassociate.cpp
index c84107d7ef2cb..3bdb687a2c3ef 100644
--- a/llvm/lib/Transforms/Scalar/Reassociate.cpp
+++ b/llvm/lib/Transforms/Scalar/Reassociate.cpp
@@ -687,9 +687,9 @@ void ReassociatePass::RewriteExprTree(BinaryOperator *I,
     // stupid, create a new node if there are none left.
     BinaryOperator *NewOp;
     if (NodesToRewrite.empty()) {
-      Constant *Undef = UndefValue::get(I->getType());
-      NewOp = BinaryOperator::Create(Instruction::BinaryOps(Opcode), Undef,
-                                     Undef, "", I->getIterator());
+      Constant *Poison = PoisonValue::get(I->getType());
+      NewOp = BinaryOperator::Create(Instruction::BinaryOps(Opcode), Poison,
+                                     Poison, "", I->getIterator());
       if (isa<FPMathOperator>(NewOp))
         NewOp->setFastMathFlags(I->getFastMathFlags());
     } else {