[Mlir-commits] [mlir] [mlir][Transforms] Do not erase IR in `remove-dead-values` (PR #173505)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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<details>
<summary>
You can test this locally with the following command:
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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- mlir/lib/Transforms/RemoveDeadValues.cpp --diff_from_common_commit
``````````

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The reproduction instructions above might return results for more than one PR
in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
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<details>
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View the diff from clang-format here.
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``````````diff
diff --git a/mlir/lib/Transforms/RemoveDeadValues.cpp b/mlir/lib/Transforms/RemoveDeadValues.cpp
index e0355a1c1..4f3e28cc4 100644
--- a/mlir/lib/Transforms/RemoveDeadValues.cpp
+++ b/mlir/lib/Transforms/RemoveDeadValues.cpp
@@ -485,9 +485,13 @@ static void processRegionBranchOp(RegionBranchOpInterface regionBranchOp,
       // Handle branch from point --> successor.
       ValueRange argsOrResults = successor.getSuccessorInputs();
       OperandRange operands =
-        point.isParent() ? regionBranchOp.getEntrySuccessorOperands(successor) : cast<RegionBranchTerminatorOpInterface>(point.getTerminatorPredecessorOrNull())
-                       .getSuccessorOperands(successor);
-      assert(argsOrResults.size() == operands.size() && "expected the same number of successor inputs as forwarded operands");
+          point.isParent() ? regionBranchOp.getEntrySuccessorOperands(successor)
+                           : cast<RegionBranchTerminatorOpInterface>(
+                                 point.getTerminatorPredecessorOrNull())
+                                 .getSuccessorOperands(successor);
+      assert(
+          argsOrResults.size() == operands.size() &&
+          "expected the same number of successor inputs as forwarded operands");
 
       for (auto [opOperand, input] :
            llvm::zip_equal(operandsToOpOperands(operands), argsOrResults)) {

``````````

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https://github.com/llvm/llvm-project/pull/173505