Rework the type checker's diagnostics to support completely checking lifetime
dependence requirements. Don't let anything through without the feature being
enabled and complete annotation or inference.
It's hard to tell why a crash occurred with just "Could not allocate memory." Modify the message to include the size/alignment, which will help distinguish between an actual lack of memory and a request for an excessively large allocation.
While we're in there, add \n to a bunch of other fatal error helper functions that didn't have it.
With '-sdk-module-cache-path', Swift textual interfaces found in the SDK will be built into a separate SDK-specific module cache.
Clang modules are not yet affected by this change, pending addition of the required API.
The Protocol field isn't really necessary, because the conformance
stores the protocol. But we do need the substituted subject type
of the requirement, just temporarily, until an abstract conformance
stores its own subject type too.
If any of the get*() methods are called on the wrong kind of
ProtocolConformanceRef, we immediately cast a pointer to an
incorrect type, which will most likely cause a crash.
The implementation of `withoutActuallyEscaping` for `@convention(block)`
functions cannot verify at runtime that the function did not actually
escape. Diagnose this as unsafe code under strict memory safety checking.
Fixes rdar://139994149.
_swift_taskGroup_cancelAllChildren relies on there being no concurrent modification when called from the owning task, but this is not guaranteed.
Rearrange things to always take the owning task's status record lock when walking the group's children. Split _swift_taskGroup_cancelAllChildren into two functions, one which assumes/requires the lock is already held, and one which acquires the lock. We don't have the owning task in this case, but we can either get it from the current task, or by looking at the parent of the child task we're working on.
rdar://147172991
* move the "SILCombine passes" into a separate file `Simplifications.def` which lives in the SILCombiner directory
* group passes by kind
* rename PASS -> LEGACY_PASS and add a comment to make clear that new passes should be implemented in Swift
NFC
Regardless of the value specified for `-unavailable-decl-optimization`, decls
that are unavailable in custom availability domains should be treated as always
unreachable at runtime.
Part of rdar://138441307.
