message: recognize rint/nearbyint c lib fns
diff: @@ -165,6 +165,16 @@ known_call(llvm::CallInst &i, const llvm::TargetLibraryInfo &TLI,
  RETURN_VAL(make_unique<FpUnaryOp>(*ty, value_name(i), *args[0],
  FpUnaryOp::Floor, parse_fmath(i)));
  + case llvm::LibFunc_nearbyint:
  + case llvm::LibFunc_nearbyintf:
  + RETURN_VAL(make_unique<FpUnaryOp>(*ty, value_name(i), *args[0],
  + FpUnaryOp::NearbyInt, parse_fmath(i)));
  +
  + case llvm::LibFunc_rint:
  + case llvm::LibFunc_rintf:
  + RETURN_VAL(make_unique<FpUnaryOp>(*ty, value_name(i), *args[0],
  + FpUnaryOp::RInt, parse_fmath(i)));
  +
  case llvm::LibFunc_round:
  case llvm::LibFunc_roundf:
  RETURN_VAL(make_unique<FpUnaryOp>(*ty, value_name(i), *args[0],
  