3 ms·

I actually talked to Lattner about the isize thing a few months back -- according to him it's fine to overflow while doing GEP because llvm shouldn't care if yo

by Gankro 10y ago

I actually talked to Lattner about the isize thing a few months back -- according to him it's fine to overflow while doing GEP because llvm shouldn't care if you pass in negative offsets to represent really big positive ones.

pcwalton 10y ago
My understanding is that overflow is pretty much fine and dandy in LLVM unless your frontend opts into the nsw flag.
- Gankro 10y ago
  Yeah, it just wasn't clear to me (or anyone else I asked) that GEP wasn't "allowed" to strictly interpret signedness and inboundness. LLVM docs, amirite?