[X86][SSE] Added i686/SSE2 vector shift tests.

We were only testing on x86-64, but we should be ensuring decent code gen of i64 shifts on 32-bit targets.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242273 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed