[6.0][IRGen] Properly compute bit mask for extra tag bits in CVW #75525
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Contributor
drexin
commented
Jul 27, 2024
drexin
commented
- Explanation: PowerOf2Ceil is not the correct function to use, because we end up with an empty mask if there is only one value stored in the extra tag bits
- Scope: Compact value witnesses
- Issues: rdar://132501359
- Original PRs: [IRGen] Properly compute bit mask for extra tag bits in CVW #75514
- Risk: Low. Only affects CVW
- Testing: Added unit test that reproduced the issue before the fix and passes after.
- Reviewers: @mikeash
rdar://132501359 PowerOf2Ceil is not the correct function to use, because we end up with an empty mask if there is only one value stored in the extra tag bits
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tbkka
approved these changes
Jul 29, 2024
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