[llvm-branch-commits] [llvm] release/19.x: [llvm] Fix __builtin_object_size interaction between Negative Offset … (#111827) (PR #114786)

[Harald van Dijk via llvm-branch-commits]

hvdijk wrote:

This more limited version is not enough to completely fix the incorrect results in LLVM internally, but should be a strict improvement compared to what is currently on `release/19.x`, passes the tests that were added, and in cases where under the old API we cannot return the correct result, opts to return the larger of the two possible correct results, which should be enough to avoid the false positives in UBSAN. Is this version suitable for the release branch?

https://github.com/llvm/llvm-project/pull/114786