llvm-project

52ded672 - [LAA] Always require non-wrapping pointers for runtime checks. (#127543)

[LAA] Always require non-wrapping pointers for runtime checks. (#127543) Currently we only check if the pointers involved in runtime checks do not wrap if we need to perform dependency checks. If that's not the case, we generate runtime checks, even if the pointers may wrap (see test/Analysis/LoopAccessAnalysis/runtime-checks-may-wrap.ll). If the pointer wraps, then we swap start and end of the runtime check, leading to incorrect checks. An Alive2 proof of what the runtime checks are checking conceptually (on i4 to have it complete in reasonable time) showing the incorrect result should be https://alive2.llvm.org/ce/z/KsHzn8 Depends on https://github.com/llvm/llvm-project/pull/127410 to avoid more regressions. PR: https://github.com/llvm/llvm-project/pull/127543