R600/SI: Use hex notation for constant in test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222578 91177308-0d34-0410-b5e6-96231b3b80d8
R600/SI: Mark s_mov_b32 and s_mov_b64 as rematerializable

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222579 91177308-0d34-0410-b5e6-96231b3b80d8