[clang] [compiler-rt] [ubsan] Display correct runtime messages for negative _BitInt (PR #93612)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

> @mstorsjo It seems your compiler build does not have int128_t enabled.

Indeed, Clang doesn't provide int128_t for 32 bit targets, AFAIK.

> Could you please test #96240 in your environment to verify it has no such problem?

That PR does seem to work fine, in such an environment, in a quick adhoc test setup - thanks!

https://github.com/llvm/llvm-project/pull/93612