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Matthias Krüger
7339fc5cec
Tighten the `!range` bounds on alignments in vtables Right now we're only telling LLVM that they're non-zero, but alignments must be powers of two so can't be more than `isize::MAX+1`. And we actually never emit anything beyond LLVM's limit of 2²⁹, so outside of 16-bit targets the limit is that. (Pulled out from rust-lang/rust#152867 which is starting to have too much in it.)