Always use mangled type names to represent type metadata in keypath patterns.
For generic types, use the generic environment to pull substituted types
from the instantiation arguments.
Finishes the type metadata part of rdar://problem/38038799.
Extend the key-path pattern with a representation of the generic environment
of the key-path, which includes the generic parameters and generic
requirements of the environment.
Windows does not support weak linking. Use an undocumented linker
feature to provide a default implementation for report_bad_alloc_error
in the case that we are not linking against LLVMSupport.
Also add overloads for these operators to an extension of Array.
This allows us to typecheck array concatenation quickly with
designated type support enabled and the remaining type checker hacks
disabled.
We should also allow references via manglings just to cover the
general case if we need it, but this is useful on its own so that
we can emit a reference to any natively-declared Swift type.
Rename the funnel points for demangling strings/nodes to metadata to
swift_getTypeByMangled(Name|Node) and make them overridable. This will let
us back-deploy mangling improvements and bug fixes.
Simplify the signature of the internal _getTypeByMangledName() used by the
standard library to what we actually (currently) use. Drop it as a
compatibility override, because it’s not a useful place to introduce
customization.
Clean up the interfaces used to go from a mangled name or demangle tree to
metadata. Parameterize these interfaces for generic parameter substitutions
(already in use) and dependent conformance substitutions (speculative).
When we emit "false" symbolic references to accesors for conformances or
type metadata, ensure that we end up with two-byte-aligned symbolic
references. This addresses a problem with ARM+Thumb compilation where the
low bit wasn't getting set for Thumb code.
Fixes rdar://problem/46067353.
The patched +[NSBundle bundleForClass:] crashes on Nil, while the original Foundation implementation returns the main bundle. Avoid the crash and pass Nil through to Foundation. This also ensures that Nil is passed through to class_getImageName rather than crashing.
SR-9188 rdar://problem/45849924
De-genericize one axis of storage buffers to speed up compilation time
of stdlib and user code. Publish the rest as ABI, since we're out of
time to reevaluate the design.
Split these two functions into a fast path (for the cached case) and a slow
path. Make the slow path overridable, so we can patch it in the future if
needed.
It took me a little while to figure out why we were fatalError()ing in such a convoluted way in Dictionary.init(uniqueKeysWithValues:); the next person to look at this code won’t waste that time.
