[ScalarizeMaskedMemIntrin] Use MinAlign to calculate alignment for the scalar load/stores to handle element types that are byte-sized but not powers of 2.

This pass doesn't handle non-byte sized types correctly at all, but at least we can make byte sized types work.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@343294 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed