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[SR-3730] Technical specification of the layout algorithms #46315

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ematejska mannequin opened this issue Jan 25, 2017 · 2 comments
Open

[SR-3730] Technical specification of the layout algorithms #46315

ematejska mannequin opened this issue Jan 25, 2017 · 2 comments
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affects ABI Flag: Affects ABI task

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@ematejska
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Mannequin

ematejska mannequin commented Jan 25, 2017

Previous ID SR-3730
Radar rdar://problem/31411200
Original Reporter @ematejska
Type Task
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Labels Task, AffectsABI
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Priority Medium

md5: da7c0c4eedd5aafaec6dfec6b21671f4

Issue Description:

Provide a technical specification of the layout algorithms that future compilers must adhere to in order to ensure binary compatibility as part of locking down ABI Stability
@bob-wilson
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@atrick
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atrick commented Sep 12, 2017

The optimizer makes assumptions about layout equivalence. See canUnsafeCastStruct/Tuple/Enum. Move this logic into a central place where we specify ABI requirements.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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affects ABI Flag: Affects ABI task
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@atrick @bob-wilson