[PATCH] D123742: llvm-reduce: Inform MRI of used phys reg masks

Wed Apr 13 15:55:05 PDT 2022

MatzeB added a comment.

In D123742#3450257 <https://reviews.llvm.org/D123742#3450257>, @MatzeB wrote:

>> I'm not sure how to directly observe this invisible cache for a test.
>
> Only thing I can think of is to have the `MachineVerifier` check.

Which on the other hand doesn't really work either, since this information seems to only exist after register rewriting; and I don't think the verifier has a notion of running before/after a pass like the rewriter...

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https://reviews.llvm.org/D123742