[SDAG] Add SDNode::values() = make_range(values_begin(), values_end())

Also use it in a few places to simplify code a little bit.  NFC

Author: Krzysztof Parzyszek

llvm/include/llvm/CodeGen/SelectionDAGNodes.h

@@ -1017,6 +1017,9 @@ END_TWO_BYTE_PACK()
 
   value_iterator value_begin() const { return ValueList; }
   value_iterator value_end() const { return ValueList+NumValues; }
+  iterator_range<value_iterator> values() const {
+    return llvm::make_range(value_begin(), value_end());
+  }
 
   /// Return the opcode of this operation for printing.
   std::string getOperationName(const SelectionDAG *G = nullptr) const;

llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp

@@ -182,9 +182,7 @@ bool VectorLegalizer::Run() {
        E = std::prev(DAG.allnodes_end()); I != std::next(E); ++I) {
     // Check if the values of the nodes contain vectors. We don't need to check
     // the operands because we are going to check their values at some point.
-    for (SDNode::value_iterator J = I->value_begin(), E = I->value_end();
-         J != E; ++J)
-      HasVectors |= J->isVector();
+    HasVectors = llvm::any_of(I->values(), [](EVT T) { return T.isVector(); });
 
     // If we found a vector node we can start the legalization.
     if (HasVectors)
@@ -318,12 +316,10 @@ SDValue VectorLegalizer::LegalizeOp(SDValue Op) {
     }
   }
 
-  bool HasVectorValueOrOp = false;
-  for (auto J = Node->value_begin(), E = Node->value_end(); J != E; ++J)
-    HasVectorValueOrOp |= J->isVector();
-  for (const SDValue &Oper : Node->op_values())
-    HasVectorValueOrOp |= Oper.getValueType().isVector();
-
+  bool HasVectorValueOrOp =
+      llvm::any_of(Node->values(), [](EVT T) { return T.isVector(); }) ||
+      llvm::any_of(Node->op_values(),
+                   [](SDValue O) { return O.getValueType().isVector(); });
   if (!HasVectorValueOrOp)
     return TranslateLegalizeResults(Op, Node);
 

llvm/lib/Target/Mips/MipsSEISelLowering.cpp

@@ -1342,9 +1342,8 @@ static SDValue lowerDSPIntr(SDValue Op, SelectionDAG &DAG, unsigned Opc) {
   // Scan output.
   SmallVector<EVT, 2> ResTys;
 
-  for (SDNode::value_iterator I = Op->value_begin(), E = Op->value_end();
-       I != E; ++I)
-    ResTys.push_back((*I == MVT::i64) ? MVT::Untyped : *I);
+  for (EVT Ty : Op->values())
+    ResTys.push_back((Ty == MVT::i64) ? MVT::Untyped : Ty);
 
   // Create node.
   SDValue Val = DAG.getNode(Opc, DL, ResTys, Ops);