[X86] Add tests showing inability of vector non-temporal load/store intrinsic to force pointer alignment (PR33830)

Clang specifies a max type alignment of 16 bytes on darwin targets, meaning that the builtin nontemporal stores don't correctly align the loads/stores to 32 or 64 bytes when required, resulting in lowering to temporal unaligned loads/stores.

llvm-svn: 309382
GitOrigin-RevId: 9207fab61aa5099cf574a35e7a3a395777bdeb7e
1 file changed