test/Sema/builtin-unary-fp.c

// RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic
void check(int);
void a() {
  check(__builtin_isfinite(1.0f));
  check(__builtin_isinf(1.0));
  check(__builtin_isinf_sign(1.0L));
  check(__builtin_isnan(1.0f));
  check(__builtin_isnormal(1.0f));
  check(__builtin_isfinite(1)); // expected-error{{requires argument of floating point type}}
  check(__builtin_isinf()); // expected-error{{too few arguments}}
  check(__builtin_isnan(1,2)); // expected-error{{too many arguments}}
}