Make default expansion for FP16 <-> FP32 nodes into libcalls

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98501 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 1911103..90c196c 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -5665,6 +5665,8 @@
   case ISD::FP_TO_SINT:  return "fp_to_sint";
   case ISD::FP_TO_UINT:  return "fp_to_uint";
   case ISD::BIT_CONVERT: return "bit_convert";
+  case ISD::FP16_TO_FP32: return "fp16_to_fp32";
+  case ISD::FP32_TO_FP16: return "fp32_to_fp16";
 
   case ISD::CONVERT_RNDSAT: {
     switch (cast<CvtRndSatSDNode>(this)->getCvtCode()) {