AMDGPU: Allow specifying different opcode on VI for SMRD/SMEM

Although the basic s_load_* instructions happen to use the same
opcode, some of the special case SMRD instructions have
different opcodes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245775 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed