[SelectionDAG] Update comments that refer to MVT::Glue as a 'flag'

Author: topperc

llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

@@ -963,7 +963,7 @@ static void AddNodeIDNode(FoldingSetNodeID &ID, const SDNode *N) {
 /// doNotCSE - Return true if CSE should not be performed for this node.
 static bool doNotCSE(SDNode *N) {
   if (N->getValueType(0) == MVT::Glue)
-    return true; // Never CSE anything that produces a flag.
+    return true; // Never CSE anything that produces a glue result.
 
   switch (N->getOpcode()) {
   default: break;
@@ -975,7 +975,7 @@ static bool doNotCSE(SDNode *N) {
   // Check that remaining values produced are not flags.
   for (unsigned i = 1, e = N->getNumValues(); i != e; ++i)
     if (N->getValueType(i) == MVT::Glue)
-      return true; // Never CSE anything that produces a flag.
+      return true; // Never CSE anything that produces a glue result.
 
   return false;
 }
@@ -1209,7 +1209,7 @@ bool SelectionDAG::RemoveNodeFromCSEMaps(SDNode *N) {
   }
 #ifndef NDEBUG
   // Verify that the node was actually in one of the CSE maps, unless it has a
-  // flag result (which cannot be CSE'd) or is one of the special cases that are
+  // glue result (which cannot be CSE'd) or is one of the special cases that are
   // not subject to CSE.
   if (!Erased && N->getValueType(N->getNumValues()-1) != MVT::Glue &&
       !N->isMachineOpcode() && !doNotCSE(N)) {
@@ -5886,7 +5886,7 @@ SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, EVT VT,
   SDNode *N;
   SDVTList VTs = getVTList(VT);
   SDValue Ops[] = {N1};
-  if (VT != MVT::Glue) { // Don't CSE flag producing nodes
+  if (VT != MVT::Glue) { // Don't CSE glue producing nodes
     FoldingSetNodeID ID;
     AddNodeIDNode(ID, Opcode, VTs, Ops);
     void *IP = nullptr;
@@ -7217,7 +7217,7 @@ SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, EVT VT,
     break;
   }
 
-  // Memoize node if it doesn't produce a flag.
+  // Memoize node if it doesn't produce a glue result.
   SDNode *N;
   SDVTList VTs = getVTList(VT);
   SDValue Ops[] = {N1, N2, N3};
@@ -8356,7 +8356,7 @@ SDValue SelectionDAG::getMemIntrinsicNode(unsigned Opcode, const SDLoc &dl,
            (int)Opcode >= ISD::FIRST_TARGET_MEMORY_OPCODE)) &&
          "Opcode is not a memory-accessing opcode!");
 
-  // Memoize the node unless it returns a flag.
+  // Memoize the node unless it returns a glue result.
   MemIntrinsicSDNode *N;
   if (VTList.VTs[VTList.NumVTs-1] != MVT::Glue) {
     FoldingSetNodeID ID;
@@ -9999,7 +9999,7 @@ SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, SDVTList VTList,
 #endif
   }
 
-  // Memoize the node unless it returns a flag.
+  // Memoize the node unless it returns a glue result.
   SDNode *N;
   if (VTList.VTs[VTList.NumVTs-1] != MVT::Glue) {
     FoldingSetNodeID ID;