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LoopRotate: ignore single-block loops where the "backedge" block only contains trivial instructions #69361

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Merged
merged 1 commit into from
Oct 24, 2023

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eeckstein
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This avoids that LoopRotate increases code size without any benefit.

rdar://117362048

… contains trivial instructions

This avoids that LoopRotate increases code size without any benefit.

rdar://117362048
@eeckstein eeckstein requested a review from meg-gupta October 24, 2023 09:21
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@swift-ci test

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@swift-ci benchmark

@eeckstein eeckstein merged commit 363ad2f into swiftlang:main Oct 24, 2023
@eeckstein eeckstein deleted the improve-loop-rotate branch October 24, 2023 16:46
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