Support ppcf128 in SelectionDAG::getConstantFP

Fixes pr14751.

Patch by Kai; Thanks!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171261 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index a38b3a5..ea80acd 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -1075,7 +1075,8 @@
     return getConstantFP(APFloat((float)Val), VT, isTarget);
   else if (EltVT==MVT::f64)
     return getConstantFP(APFloat(Val), VT, isTarget);
-  else if (EltVT==MVT::f80 || EltVT==MVT::f128 || EltVT==MVT::f16) {
+  else if (EltVT==MVT::f80 || EltVT==MVT::f128 || EltVT==MVT::ppcf128 ||
+           EltVT==MVT::f16) {
     bool ignored;
     APFloat apf = APFloat(Val);
     apf.convert(*EVTToAPFloatSemantics(EltVT), APFloat::rmNearestTiesToEven,