Implement the fpowi now by lowering to a libcall

llvm-svn: 30225
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 4fa168f..044a2fa 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2404,6 +2404,7 @@
   case ISD::FSQRT:  return "fsqrt";
   case ISD::FSIN:   return "fsin";
   case ISD::FCOS:   return "fcos";
+  case ISD::FPOWI:  return "fpowi";
 
   // Binary operators
   case ISD::ADD:    return "add";