[X86] Add test case for trunc_packus_v16i32_v16i8_store to min-legal-vector-width.ll
[X86] Add test case for trunc_packus_v16i32_v16i8_store to min-legal-vector-width.ll

We aren't folding the vpmovuswb into the store.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@374507 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm