[Mlir-commits] [mlir] [mlir] Avoid rewriting unreachable blocks in the greedy driver (PR #225814)

[Matthias Springer]

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matthias-springer wrote:

Can you add a comment why you keep track of the entry block in `ReachabilityState`? Could this be different `region->begin()` (where `region` is the key of the `reachableBlocks` dense map)?

https://github.com/llvm/llvm-project/pull/225814