gcc/testsuite/gcc.dg/Wattributes-10.c

   1 /* PR middle-end/86453 - error: type variant differs by TYPE_PACKED in
   2    free_lang_data since r255469
   3    { dg-do compile }
   4    { dg-options "-Wall -ftrack-macro-expansion=0" }
   5    { dg-additional-options "-fno-common" { target hppa*-*-hpux* } } */
   6
   7 #define A(expr) do { int a[1 - 2 * !(expr)]; (void)&a; } while (0)
   8
   9 struct S
  10 {
  11   int* __attribute__ ((aligned (16))) paligned;
  12   int* __attribute__ ((packed)) ppacked;                  /* { dg-warning ".packed. attribute ignored for type .int \\\*." } */
  13
  14   int* __attribute__ ((aligned (16), packed)) qaligned;   /* { dg-warning "ignoring attribute .packed. because it conflicts with attribute .aligned." } */
  15   int* __attribute__ ((packed, aligned (16))) qpacked;    /* { dg-warning ".packed. attribute ignored for type .int \\\*." } */
  16 } s;    /* { dg-error "alignment of 's' is greater" "" { target pdp11*-*-* } } */
  17
  18
  19 void test (void)
  20 {
  21   /* Verify that attributes reported ignored really are ignored
  22      and not applied.  */
  23
  24   A (__alignof__ (s.paligned) == 16);
  25   A (__alignof__ (s.ppacked) < 16);
  26   A (__alignof__ (s.qaligned) == 16);
  27   A (__alignof__ (s.qpacked) == __alignof__ (s.paligned));
  28 }