[PATCH] D76007: [TableGen][GlobalISel] Account for HwMode in RegisterBank register sizes

[Benjamin Kramer via Phabricator via llvm-commits]

bkramer added a comment.

In D76007#1944582 <https://reviews.llvm.org/D76007#1944582>, @lewis-revill wrote:

> I'm lacking an understanding of how concurrency is expected to work within LLVM, but since there is only one RegisterBankInfo constructed per subtarget I don't see how there is a problem with updating the global RegBanks array? Likewise the HwMode is constant for the subtarget, so the write will be of the same value.


There can be many subtargets around, and those can be created concurrently. Having state in a global variable is not going to work.


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