gcc/testsuite/gcc.dg/pr53037-3.c

   1 /* PR c/53037.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O0 -Wall" } */
   4 /* { dg-skip-if "" { avr-*-* } } */
   5
   6 struct __attribute__ ((aligned (8))) S8 { char a[8]; };
   7 struct __attribute__ ((packed)) S1 {
   8   struct S8 s8;
   9 }; /* { dg-warning "alignment 1 of 'struct S1' is less than 8" } */
  10
  11 struct __attribute__ ((packed, aligned (8))) S2 {
  12   struct S8 s8;
  13 };
  14
  15 struct __attribute__ ((packed, aligned (8))) S3 {
  16   int i1;
  17   struct S8 s8; /* { dg-warning "'s8' offset 4 in 'struct S3' isn't aligned to 8" } */
  18 };
  19
  20 struct __attribute__ ((packed, aligned (8))) S4 {
  21   int i1;
  22   int i2;
  23   struct S8 s8;
  24 };
  25
  26 struct __attribute__ ((packed)) S5 {
  27    long long ll;
  28 };
  29
  30 union __attribute__ ((packed)) U1 {
  31   int i1;
  32   struct S8 s8;
  33 }; /* { dg-warning "alignment 1 of 'union U1' is less than 8" } */
  34
  35 union __attribute__ ((packed, aligned (8))) U2 {
  36   int i1;
  37   struct S8 s8;
  38 };