Remove ancient, commented out code from TableGen, NFC

These pieces were commented out in r98534 and r129691, i.e. 6+ years ago.

llvm-svn: 313038

llvm/utils/TableGen/CodeGenDAGPatterns.cpp

@@ -1976,18 +1976,6 @@ bool TreePatternNode::ApplyTypeConstraints(TreePattern &TP, bool NotRegisters) {
   }
 
   bool MadeChange = getChild(0)->ApplyTypeConstraints(TP, NotRegisters);
-
-
-  // If either the output or input of the xform does not have exact
-  // type info. We assume they must be the same. Otherwise, it is perfectly
-  // legal to transform from one type to a completely different type.
-#if 0
-  if (!hasTypeSet() || !getChild(0)->hasTypeSet()) {
-    bool MadeChange = UpdateNodeType(getChild(0)->getExtType(), TP);
-    MadeChange |= getChild(0)->UpdateNodeType(getExtType(), TP);
-    return MadeChange;
-  }
-#endif
   return MadeChange;
 }
 

llvm/utils/TableGen/FastISelEmitter.cpp

@@ -217,10 +217,6 @@ struct OperandsSignature {
           PredNo = ImmediatePredicates.getIDFor(PredFn)+1;
         }
 
-        // Handle unmatched immediate sizes here.
-        //if (Op->getType(0) != VT)
-        //  return false;
-
         Operands.push_back(OpKind::getImm(PredNo));
         continue;
       }