[PATCH] D157564: [MCP] Invalidate copy for super register in copy source

[Kai Luo via Phabricator via llvm-commits]

lkail added a comment.

> We only insert the MI corresponding to the copies for tracking the defs

I see. I think the semantic of `Copy[Unit].MI` is the COPY defines `Unit`, forward propagation should be relying on this semantic.

Instead, Can `Copy[Unit].LastSeenUseInCopy`, which has the semantic of the most recent COPY uses the `Unit`, help this case?


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  https://reviews.llvm.org/D157564/new/

https://reviews.llvm.org/D157564