We need to use the ivar offset variables in this case, since the Swift field offset vector doesn't pick up the adjusted offsets from the ObjC runtime. Fixes SR-5036 | rdar://problem/32488871.
This is a bit more robust and user-friendly than hoping more brittle recovery in SILGen or IRGen for unsupported components kicks in. rdar://problem/32200714
A property imported from Objective-C, or marked in Swift with the `dynamic` keyword, doesn't have a vtable slot, so can't be identified that way. Use the ObjC selector as the unique identifier to ascribe equality to such components. Fixes rdar://problem/31768669. (While we're here, throw some more execution tests and a changelog note in.)
I had optimistically written the code here optimistically hoping #7837 would land in time for me to merge, but that didn't happen, so adjust some things to match the current 12-byte object header size on 32-bit, and introduce some ABI constants for the expected 32- and 64-bit object header sizes we can assert against so that we have some robustness when it eventually changes again. Implements rdar://problem/31768303.
With more recent versions of LLVM (e.g., used with master-next) the
argument of REQUIRES is parsed as an expression. Do not use "rdar"
URLS for these since it confuses lit.
Arnold Schwaighofer
Robert Widmann
Slava Pestov
Joe Groff
Joe Groff
swift-ci
Huon Wilson
Bob Wilson
Erik Eckstein