DAG: Add flags to dumps

[bogner]

LGTM

[arsenm]

r315690

lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp

for (unsigned i = 0, e = getNumValues(); i != e; ++i) {
     if (getValueType(i) == MVT::Other)
       OS << "ch";
     else
       OS << getValueType(i).getEVTString();
   }
 }
 
 void SDNode::print_details(raw_ostream &OS, const SelectionDAG *G) const {
+  if (getFlags().hasNoUnsignedWrap())
+    OS << " nuw";
+
+  if (getFlags().hasNoSignedWrap())
+    OS << " nsw";
+
+  if (getFlags().hasExact())
+    OS << " exact";
+
+  if (getFlags().hasUnsafeAlgebra())
+    OS << " unsafe";
+
+  if (getFlags().hasNoNaNs())
+    OS << " nnan";
+
+  if (getFlags().hasNoInfs())
+    OS << " ninf";
+
+  if (getFlags().hasNoSignedZeros())
+    OS << " nsz";
+
+  if (getFlags().hasAllowReciprocal())
+    OS << " arcp";
+
+  if (getFlags().hasAllowContract())
+    OS << " contract";
+
+  if (getFlags().hasVectorReduction())
+    OS << " vector-reduction";
+
   if (const MachineSDNode *MN = dyn_cast<MachineSDNode>(this)) {
     if (!MN->memoperands_empty()) {
       OS << "<";
       OS << "Mem:";
       for (MachineSDNode::mmo_iterator i = MN->memoperands_begin(),
            e = MN->memoperands_end(); i != e; ++i) {
         OS << **i;
         if (std::next(i) != e)