llvm-project

526a4d4d - [LAA] Always use DepCands when grouping runtime checks. (#91196)

[LAA] Always use DepCands when grouping runtime checks. (#91196) Update groupChecks to always use DepCands to try and merge runtime checks. DepCands contains the dependency partition, grouping together all accessed pointers to he same underlying objects. If we computed the dependencies, We only need to check accesses to the same underlying object, if there is an unknown dependency for this underlying object; otherwise we already proved that all accesses withing the underlying object are safe w.r.t. vectorization and we only need to check that accesses to the underlying object don't overlap with accesses to other underlying objects. To ensure runtime checks are generated for the case with unknown dependencies, remove equivalence classes containing accesses involved in unknown dependencies. This reduces the number of runtime checks needed in case non-constant dependence distances are found, and is in preparation for removing the restriction that the accesses need to have the same stride which was added in https://github.com/llvm/llvm-project/pull/88039. PR: https://github.com/llvm/llvm-project/pull/91196