[PATCH] D132080: RegisterClassInfo: Fix CSR cache invalidation

[Matthias Braun via Phabricator via llvm-commits]

MatzeB added a comment.

For context: I found this while tweaking regalloc heuristics. Surprisingly this bug seems to have nearly no effect on most targets in practice. I suspect this is because calling conventions and CSR lists don't typically change for most targets and even if they did this only affected the allocation orders and things like eviction could restore the desired CSR usage.


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  https://reviews.llvm.org/D132080/new/

https://reviews.llvm.org/D132080