[Mlir-commits] [mlir] [mlir][scf] Fix WhileMoveIfDown with duplicated scf.condition operands (PR #219458)

[Ming Yan]

================

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NexMing wrote:

The root cause is that replaceAllUsesWith(ifResult, elseValue) replaces unexpected def-use chains. We can instead specify that only the expected def-use chain should be replaced.
```
        unsigned idxCapture = idx;
        rewriter.modifyOpInPlace(conditionOp, [&] {
          conditionOp.getArgsMutable()[idxCapture].assign(elseValue);
        });
```

https://github.com/llvm/llvm-project/pull/219458