[AMDGPU] Change placeholder from undef to poison (llvm#130858)

pedroclobo · frederik-h · commit 3d42bed4fd14 · 2025-03-18T05:38:21.000-04:00
Replace `undef` debug info with `poison`.
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULowerBufferFatPointers.cpp b/llvm/lib/Target/AMDGPU/AMDGPULowerBufferFatPointers.cpp
@@ -1620,7 +1620,7 @@ void SplitPtrStructs::killAndReplaceSplitInstructions(
         Dbg->setExpression(*RsrcExpr);
         Dbg->replaceVariableLocationOp(I, Rsrc);
       } else {
-        Dbg->replaceVariableLocationOp(I, UndefValue::get(I->getType()));
+        Dbg->replaceVariableLocationOp(I, PoisonValue::get(I->getType()));
       }
     }
 

Original file line number	Diff line number	Diff line change
`@@ -1620,7 +1620,7 @@ void SplitPtrStructs::killAndReplaceSplitInstructions(`
`1620`	`1620`	`Dbg->setExpression(*RsrcExpr);`
`1621`	`1621`	`Dbg->replaceVariableLocationOp(I, Rsrc);`
`1622`	`1622`	`} else {`
`1623`		`- Dbg->replaceVariableLocationOp(I, UndefValue::get(I->getType()));`
	`1623`	`+ Dbg->replaceVariableLocationOp(I, PoisonValue::get(I->getType()));`
`1624`	`1624`	`}`
`1625`	`1625`	`}`
`1626`	`1626`