Allan Shortlidge 4aa516aebb SILGen: Fix if #available for unavailable custom domains in zippered modules. ...

When generating SIL for an `if #available(SomeDomain)` query in code being
compiled for a zippered target, the generated code was mis-compiled if
`SomeDomain` were disabled at compile time. Empty version ranges need to be
handled explicitly by `SILGenFunction::emitZipperedOSVersionRangeCheck()`.

SILGen still miscompiles `if #unavailable` queries generally in code compiled
for a zippered target (rdar://147929876).

Resolves rdar://150888941.

2025-05-25 08:27:12 -07:00

99 KiB

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