Mark MergedLoadStoreMotion as not preserving MemDep results
Summary:
MemDep caches results that signify that a dependence is non-local, and
there is currently no way to invalidate such cache entries.
Unfortunately, when MLSM sinks a store that can result in a non-local
dependence becoming a local one, and then MemDep gives wrong answers.
The easiest way out here is to just say that MLSM does indeed not
preserve MemDep results.
Reviewers: davide, Gerolf
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D43177
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325880
91177308-0d34-0410-b5e6-
96231b3b80d8
OSDN Git Service
