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

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