Fix an infinite recursion in GetNegatedExpression.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37086 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/DAGCombiner.cpp

@@ -449,7 +449,7 @@ static SDOperand GetNegatedExpression(SDOperand Op, SelectionDAG &DAG) {
   case ISD::FP_ROUND:
   case ISD::FSIN:
     return DAG.getNode(Op.getOpcode(), Op.getValueType(),
-                       GetNegatedExpression(Op, DAG));
+                       GetNegatedExpression(Op.getOperand(0), DAG));
   }
 }