R600: Add SI load support for v[24]i32 and store for v2i32

Also add a seperate vector lit test file, since r600 doesn't seem to handle
v2i32 load/store yet, but we can test both for SI.

Patch by: Aaron Watry

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
Signed-off-by: Aaron Watry <awatry@gmail.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184021 91177308-0d34-0410-b5e6-96231b3b80d8
[yaml2obj] Add support for sh_link via `Link` key.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184022 91177308-0d34-0410-b5e6-96231b3b80d8
[yaml2obj] Move some classes into anonymous namespaces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184025 91177308-0d34-0410-b5e6-96231b3b80d8
Debug Info: Don't print the display name and colon prefix for DEBUG_VALUE comments if the display name is empty

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184026 91177308-0d34-0410-b5e6-96231b3b80d8