[AVX512] Simplify use of !con()

No change in X86.td.expanded.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218485 91177308-0d34-0410-b5e6-96231b3b80d8
R600/SI: Fix emitting trailing whitespace after s_waitcnt

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218486 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Avoid repeated check lines

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218487 91177308-0d34-0410-b5e6-96231b3b80d8