MulOp is actually a Mips specific node, so do the match using Opcode. This fixes PR6192

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94977 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsISelDAGToDAG.cpp b/lib/Target/Mips/MipsISelDAGToDAG.cpp
index e3a45d2..d9f79f0 100644
--- a/lib/Target/Mips/MipsISelDAGToDAG.cpp
+++ b/lib/Target/Mips/MipsISelDAGToDAG.cpp
@@ -426,7 +426,7 @@
 
       SDValue InFlag = SDValue(MulNode, 0);
 
-      if (MulOp == ISD::MUL)
+      if (Opcode == ISD::MUL)
         return CurDAG->getMachineNode(Mips::MFLO, dl, MVT::i32, InFlag);
       else
         return CurDAG->getMachineNode(Mips::MFHI, dl, MVT::i32, InFlag);