PrintAsClang is supposed to emit declarations in the same order regardless of the compiler’s internal state, but we have repeatedly found that our current criteria are inadequate, resulting in non-functionality-affecting changes to generated header content. Add a diagnostic that’s emitted when this happens soliciting a bug report.
Since there *should* be no cases where the compiler fails to order declarations, this diagnostic is never actually emitted. Instead, we test this change by enabling `-verify` on nearly all PrintAsClang tests to make sure they are unaffected.
This did demonstrate a missing criterion that only mattered in C++ mode: extensions that varied only in their generic signature were not sorted stably. Add a sort criterion for this.
Technically, these operations belong in the ObjectiveC module, where NSObject
is defined. Keep them there. However, we need to build the mock ObjectiveC
overlay with `-disable-objc-attr-requires-foundation-module` now.
These tests explicitly disable the use of modules. However, the lit
configuration is such that the module cache path will be passed unconditionally
to the clang invocation. Squelch the unused option warning (error).
Reverts r28087. We're going back to the C++ interface for SIMD, and the changes in this patch are needless complication for that design.
Swift SVN r28384
The design we landed on for SIMD is to define the vector types as nested types of their element, e.g. Float.Vector4, Int32.Vector2, etc. Update the Clang importer and other mapping facilities to match.
Swift SVN r28087
