[X86] Add test cases to show bad use of "and $0" and "orl $-1" for minsize when the store is volatile

If the store is volatile we shouldn't be adding a little that didn't exist in the source.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339040 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed