[PATCH] D88356: [ConstantRange] Make exhaustive testing more principled (NFC)

[Nikita Popov via Phabricator via llvm-commits]

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The current infrastructure for exhaustive ConstantRange testing is somewhat confusing in what exactly it tests (D88283 <https://reviews.llvm.org/D88283>) and currently cannot even be used for operations that produce precise results, rather than signed/unsigned approximations.

This patch tries to make the testing more principled by collecting the exact set of results of an operation into a bit set and then comparing it against the range approximation by:

- Checking conservative correctness: All elements in the set must be in the range.
- Checking optimality:


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88356

Files:
  llvm/unittests/IR/ConstantRangeTest.cpp

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