[AMDGPU] Change placeholder from undef to poison

[pedroclobo]

Replace undef debug info with poison.

[llvmbot]

@llvm/pr-subscribers-backend-amdgpu

Author: Pedro Lobo (pedroclobo)

Changes

Replace undef debug info with poison.

---

Full diff: https://github.com/llvm/llvm-project/pull/130858.diff

1 Files Affected:

• (modified) llvm/lib/Target/AMDGPU/AMDGPULowerBufferFatPointers.cpp (+1-1)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPULowerBufferFatPointers.cpp b/llvm/lib/Target/AMDGPU/AMDGPULowerBufferFatPointers.cpp
index 608b43b59eed3..5dd1fe14e5626 100644
--- 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()));
       }
     }
 

[shiltian]

No test case changes?

[pedroclobo]

No test case changes?

All tests passed on my machine. I guess there is no test coverage for this code.