test/SemaTemplate/attributes.cpp

// RUN: %clang_cc1 -fsyntax-only -verify %s

namespace attribute_aligned {
  template<int N>
  struct X {
    char c[1] __attribute__((__aligned__((N)))); // expected-error {{alignment is not a power of 2}}
  };

  template <bool X> struct check {
    int check_failed[X ? 1 : -1]; // expected-error {{array size is negative}}
  };

  template <int N> struct check_alignment {
    typedef check<N == sizeof(X<N>)> t; // expected-note {{in instantiation}}
  };

  check_alignment<1>::t c1;
  check_alignment<2>::t c2;
  check_alignment<3>::t c3; // expected-note 2 {{in instantiation}}
  check_alignment<4>::t c4;
}