AZero13 wrote: > How often does this appear in practice? Normally, `NSObject` is implemented > in a shared library and it is completely valid in a non-fragile ABI for a > future version to have an extra ivar added (and, in the wild, we've seen > people do this for extra state in debug builds). > > > > I implemented this optimisation for the GNU runtime 15-20 years ago, but we > stopped shipping it around ten or so years ago because the conditions that > made it sound were triggered only if people statically linked the Foundation > framework and did LTO, and that basically never happened. > >
WebKit does this so it is worth shipping for the Apple runtime at least. Also there are cases in foundation where this happens https://github.com/llvm/llvm-project/pull/126591 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
