AMDGPU: fix bad test exposed by r314522

The test attempts to use -1 as carry-in for v_addc_*.

Before writing r314522, I did actually test this on real hardware,
and found that it doesn't work. So r314522 is correct in restricting
the carry-in operand: just remove those tests to make things pass
again.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@314530 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed