[LoadStoreVectorize] Ignore interleaved invariant loads.

The memory location an invariant load is using can never be clobbered by
any store, so it's safe to move the load ahead of the store.

Differential Revision: https://reviews.llvm.org/D46011

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330725 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed