[PATCH] D98145: [FastISel] Don't trivially kill extractvalues (PR49467)

[Nikita Popov via Phabricator via llvm-commits]

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This patch is intended as a minimal fix for LLVM 12. For the main branch, I think we should rip out the whole kill tracking in FastISel entirely. FastRA can determine kills itself, and at least in my test, there is no negative compile-time impact to letting it do so. Maybe this used to be different, but currently the hasTrivialKill functionality seems to be unnecessary complexity.


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