[PATCH] D72423: [DemandedBits] Improve accuracy of Add propagator

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri requested changes to this revision.
lebedev.ri added a comment.
This revision now requires changes to proceed.

In D72423#1815871 <https://reviews.llvm.org/D72423#1815871>, @nikic wrote:

> @rrika Performing these kinds of tests on IR is both quite inefficient and unnecessary complex. It would be better to extract the code logic (which just operates on APInts) into a separate file, which will allow you to easily test it, and also share the logic with other places doing demanded bits analysis, such as InstCombine and SelectionDAG.





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https://reviews.llvm.org/D72423