[llvm] a4b4974 - [StackColoring] Use poison instead of undef as placeholder when deleting values [NFC]

[Nuno Lopes via llvm-commits]

Author: Nuno Lopes
Date: 2024-06-30T11:55:22+01:00
New Revision: a4b49745af92375968659411b02ac4866a076dd1

URL: https://github.com/llvm/llvm-project/commit/a4b49745af92375968659411b02ac4866a076dd1
DIFF: https://github.com/llvm/llvm-project/commit/a4b49745af92375968659411b02ac4866a076dd1.diff

LOG: [StackColoring] Use poison instead of undef as placeholder when deleting values [NFC]

Added: 
    

Modified: 
    llvm/lib/CodeGen/StackColoring.cpp

Removed: 
    


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diff  --git a/llvm/lib/CodeGen/StackColoring.cpp b/llvm/lib/CodeGen/StackColoring.cpp
index 36414e742c327..10c69cdc0d87f 100644
--- a/llvm/lib/CodeGen/StackColoring.cpp
+++ b/llvm/lib/CodeGen/StackColoring.cpp
@@ -964,14 +964,14 @@ void StackColoring::remapInstructions(DenseMap<int, int> &SlotRemap) {
       MFI->setObjectSSPLayout(SI.second, FromKind);
 
     // The new alloca might not be valid in a llvm.dbg.declare for this
-    // variable, so undef out the use to make the verifier happy.
+    // variable, so poison out the use to make the verifier happy.
     AllocaInst *FromAI = const_cast<AllocaInst *>(From);
     if (FromAI->isUsedByMetadata())
-      ValueAsMetadata::handleRAUW(FromAI, UndefValue::get(FromAI->getType()));
+      ValueAsMetadata::handleRAUW(FromAI, PoisonValue::get(FromAI->getType()));
     for (auto &Use : FromAI->uses()) {
       if (BitCastInst *BCI = dyn_cast<BitCastInst>(Use.get()))
         if (BCI->isUsedByMetadata())
-          ValueAsMetadata::handleRAUW(BCI, UndefValue::get(BCI->getType()));
+          ValueAsMetadata::handleRAUW(BCI, PoisonValue::get(BCI->getType()));
     }
 
     // Note that this will not replace uses in MMOs (which we'll update below),