JIT: Disable flag optimization on arm32 again#122215
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jakobbotsch merged 1 commit intodotnet:mainfrom Dec 5, 2025
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arm32 does not set the right flags for these bitwise and operations, so it cannot be enabled.
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cc @dotnet/jit-contrib PTAL @EgorBo (fixes innerloop) |
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch |
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Pull request overview
This PR disables flag optimization for GT_AND and GT_AND_NOT operations on ARM32 architecture, which was incorrectly enabled in a previous change (#121380). The issue was that ARM32 does not set the correct flags for these operations, causing test failures referenced in #122185.
- Restricts
SupportsSettingFlagsAsCompareToZero()to ARM64 only (previously both ARM32 and ARM64) - Refactors
SupportsSettingZeroFlag()to callSupportsSettingFlagsAsCompareToZero()first, eliminating duplicate code - Properly fixes the root cause of test failures on ARM32
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filipnavara
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Dec 5, 2025
EgorBo
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Dec 5, 2025
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/ba-g Deadletter |
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arm32 does not set the right flags for these operations, so it cannot be enabled.
I enabled this in #121380, and these tests did fail there too, but I mistakenly thought the failure was preexisting and the same as #121659.
Also do a small refactoring while I'm here, to make use of
SupportsSettingFlagsAsCompareToZerofromSupportsSettingZeroFlag.Fix #122185