gcc/testsuite/gcc.dg/sso-15.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3
   4 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
   5 #define REV_ENDIANNESS __attribute__((scalar_storage_order("big-endian")))
   6 #else
   7 #define REV_ENDIANNESS __attribute__((scalar_storage_order("little-endian")))
   8 #endif
   9
  10 struct X { int *p; } REV_ENDIANNESS;
  11
  12 struct X x;
  13
  14 struct X __attribute__((noinline)) foo (int *p)
  15 {
  16   struct X x;
  17   x.p = p;
  18   return x;
  19 }
  20
  21 void __attribute((noinline)) bar (void)
  22 {
  23   *x.p = 1;
  24 }
  25
  26 extern void abort (void);
  27
  28 int main (void)
  29 {
  30   int i = 0;
  31   x = foo(&i);
  32   bar();
  33   if (i != 1)
  34     abort ();
  35   return 0;
  36 }