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

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earnol wrote:

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

It looks like a little bit more complex.
I checked with Standalone-i386 and AddressSanitizer-i386 targets. They do have int128_t for 32 bit targets as soon as clang itself built as 64-bit binary.

> > 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!
Excellent. Waiting for sign-off in this case.


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