[6.2][SILOptimizer]: fix some missing use after consume diagnostics #83525
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Updates ConsumeOperatorCopyableValuesChecker to identify store_borrow
instructions as a liveness-affecting use so that patterns that would
previously slip through undiagnosed are correctly identified. e.g.
```swift
func use<V>(_ v: borrowing V) {}
func f() {
let a = A()
_ = consume a
use(a) // previously would not be diagnosed
}
```
(cherry picked from commit 754a300)
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@swift-ci please smoke test |
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@nate-chandler could you please let me know your assessment of the 'risk' of this change (and feel free to just edit the description if that's possible)? |
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@jamieQ certainly! This is a low risk change. It only affects consume checking of copyable values. It only increases the strictness of that checking, so it shouldn't cause any previously diagnosed code to go undiagnosed. |
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@DougGregor FYI as release manager |
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@swift-ci please test linux platform |
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@swift-ci please test macos platform |
tbkka
approved these changes
Aug 14, 2025
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Explanation:
Updates
ConsumeOperatorCopyableValuesCheckerto identifystore_borrowinstructions as a liveness-affecting use so that patterns that would previously slip through undiagnosed are correctly identifiedScope:
Issues:
Original PRs:
Risk:
Testing:
Reviewers: