[clang] [llvm] [mlir] [NVPTX] Add support for Shared Cluster Memory address space. (PR #135444)

[via llvm-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {undef deprecator}-->


:warning: undef deprecator found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git diff -U0 --pickaxe-regex -S '([^a-zA-Z0-9#_-]undef[^a-zA-Z0-9_-]|UndefValue::get)' 'HEAD~1' HEAD llvm/test/CodeGen/NVPTX/addrspacecast-ptx64.ll llvm/test/CodeGen/NVPTX/distributed-shared-cluster.ll clang/lib/Basic/Targets/NVPTX.cpp clang/test/CodeGen/target-data.c llvm/include/llvm/Support/NVPTXAddrSpace.h llvm/lib/IR/AutoUpgrade.cpp llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXInstPrinter.cpp llvm/lib/Target/NVPTX/NVPTX.h llvm/lib/Target/NVPTX/NVPTXAliasAnalysis.cpp llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp llvm/lib/Target/NVPTX/NVPTXUtilities.h llvm/test/Assembler/auto_upgrade_nvvm_intrinsics.ll llvm/test/CodeGen/NVPTX/cp-async-bulk-tensor-g2s.ll llvm/test/CodeGen/NVPTX/cp-async-bulk.ll llvm/test/CodeGen/NVPTX/nvptx-aa.ll mlir/include/mlir/Dialect/LLVMIR/NVVMDialect.h
``````````

</details>


The following files introduce new uses of undef:
 - llvm/test/Assembler/auto_upgrade_nvvm_intrinsics.ll

[Undef](https://llvm.org/docs/LangRef.html#undefined-values) is now deprecated and should only be used in the rare cases where no replacement is possible. For example, a load of uninitialized memory yields `undef`. You should use `poison` values for placeholders instead.

In tests, avoid using `undef` and having tests that trigger undefined behavior. If you need an operand with some unimportant value, you can add a new argument to the function and use that instead.

For example, this is considered a bad practice:
```llvm
define void @fn() {
  ...
  br i1 undef, ...
}
```

Please use the following instead:
```llvm
define void @fn(i1 %cond) {
  ...
  br i1 %cond, ...
}
```

Please refer to the [Undefined Behavior Manual](https://llvm.org/docs/UndefinedBehavior.html) for more information.



https://github.com/llvm/llvm-project/pull/135444