[SelectionDAGISel] small cleanup to INLINEASM_BR selection. NFC

[nickdesaulniers]

Summary

This code was throwing away the opcode for a boolean, which was then
reconstructing the opcode from that boolean. Just pass the opcode, and
forget the boolean.

llvm/include/llvm/CodeGen/SelectionDAGISel.h

public:
   /// Return whether the node may raise an FP exception.
   bool mayRaiseFPException(SDNode *Node) const;
 
   bool isOrEquivalentToAdd(const SDNode *N) const;
 
 private:
 
   // Calls to these functions are generated by tblgen.
-  void Select_INLINEASM(SDNode *N, bool Branch);
+  void Select_INLINEASM(SDNode *N);
   void Select_READ_REGISTER(SDNode *Op);
   void Select_WRITE_REGISTER(SDNode *Op);
   void Select_UNDEF(SDNode *N);
   void CannotYetSelect(SDNode *N);
 
   void Select_FREEZE(SDNode *N);
 
 private:

llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp

while (VT == MVT::Glue) {
     // the chain, HandleMergeInputChains will not consider it.  Because of
     // this, we cannot ignore chains in this predicate.
     IgnoreChains = false;
   }
 
   return !findNonImmUse(Root, N.getNode(), U, IgnoreChains);
 }
 
-void SelectionDAGISel::Select_INLINEASM(SDNode *N, bool Branch) {
+void SelectionDAGISel::Select_INLINEASM(SDNode *N) {
   SDLoc DL(N);
 
   std::vector<SDValue> Ops(N->op_begin(), N->op_end());
   SelectInlineAsmMemoryOperands(Ops, DL);
 
   const EVT VTs[] = {MVT::Other, MVT::Glue};
-  SDValue New = CurDAG->getNode(Branch ? ISD::INLINEASM_BR : ISD::INLINEASM, DL, VTs, Ops);
+  SDValue New = CurDAG->getNode(N->getOpcode(), DL, VTs, Ops);
   New->setNodeId(-1);
   ReplaceUses(N, New.getNode());
   CurDAG->RemoveDeadNode(N);
 }
 
 void SelectionDAGISel::Select_READ_REGISTER(SDNode *Op) {
   SDLoc dl(Op);
   MDNodeSDNode *MD = cast<MDNodeSDNode>(Op->getOperand(1));
case ISD::LIFETIME_END:
     return;
   case ISD::AssertSext:
   case ISD::AssertZext:
     ReplaceUses(SDValue(NodeToMatch, 0), NodeToMatch->getOperand(0));
     CurDAG->RemoveDeadNode(NodeToMatch);
     return;
   case ISD::INLINEASM:
   case ISD::INLINEASM_BR:
-    Select_INLINEASM(NodeToMatch,
-                     NodeToMatch->getOpcode() == ISD::INLINEASM_BR);
+    Select_INLINEASM(NodeToMatch);
     return;
   case ISD::READ_REGISTER:
     Select_READ_REGISTER(NodeToMatch);
     return;
   case ISD::WRITE_REGISTER:
     Select_WRITE_REGISTER(NodeToMatch);
     return;
   case ISD::UNDEF: