[PATCH] D89149: [SelectionDAG] Fix alias checking with potential later stack reuse

[Nirav Dave via Phabricator via llvm-commits]

niravd added a comment.

As an alternative, we could update ImproveChain to limit the aliasing around lifetime_start / end to disallow improving the chain dependence of a mem op node from a different lifetime node that may alias. That should prohibit access from two aliasable frame indices from being concurrent while still allowing us to leverage that disjoint allocs should be disjoint.


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https://reviews.llvm.org/D89149