[X86][LegalizeDAG] FPOWI: promote f16 operand

Author: v01dxyz

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -614,6 +614,7 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
     setOperationAction(ISD::FTAN, VT, Action);
     setOperationAction(ISD::FSQRT, VT, Action);
     setOperationAction(ISD::FPOW, VT, Action);
+    setOperationAction(ISD::FPOWI, VT, Action);
     setOperationAction(ISD::FLOG, VT, Action);
     setOperationAction(ISD::FLOG2, VT, Action);
     setOperationAction(ISD::FLOG10, VT, Action);