[Runtime] Don't write to rodata if values already match. #34616
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initClassFieldOffsetVector writes the instanceStart and size to the class's rodata. In some cases they already match, and this write will dirty memory unnecessarily, and prevent the compiler from emitting those rodatas into read-only memory. rdar://problem/71119533
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@swift-ci please test |
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@swift-ci please test windows platform |
slavapestov
approved these changes
Nov 10, 2020
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Thanks Slava! |
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initClassFieldOffsetVectorwrites the instanceStart and size to the class's rodata. In some cases they already match, and this write will dirty memory unnecessarily, and prevent the compiler from emitting those rodatas into read-only memory.rdar://problem/71119533