[6.0] IRGen: Properly adjust the closure type of a partial_apply of an objc_method #73850
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…n objc_method It needs to match with the (large loadable) lowered closure type in the rest of the program: Large types in the signature need to be passed indirectly. A failure to do so results in mis-matched ptr auth descriminators and a crash at runtime on arm64e. Scope: Should only affect programs that form closures of objective c methods involving large types Risk: Low for other code, medium for programs involving such closures Testing: A regression test was added rdar://127367321 Original PR: swiftlang#73791 (cherry picked from commit 69b635a)
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tbkka
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May 28, 2024
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It needs to match with the (large loadable) lowered closure type in the rest of the program: Large types in the signature need to be passed indirectly.
A failure to do so results in mis-matched ptr auth descriminators and a crash at runtime on arm64e.
Scope: Should only affect programs that form closures of objective c methods involving large types
Risk: Low for other code, medium for programs involving such closures
Testing: A regression test was added
rdar://127367321
Original PR: #73791
(cherry picked from commit 69b635a)