[SelectionDAG] Don't default the SelectionDAG* parameter to SDValue::dump to nullptr. Use two different signatures instead.

This matches what we do in SDNode.

This should allow SDValue::dump to be used in the debugger without getting an error if you don't pass an argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@327811 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed