[LAA] Default getInfo to not speculate symbolic strides. NFC

Soon we won't be passing Strides to getInfo and then we'll have fewer
call sites to update.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272878 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed