gcc/testsuite/gcc.c-torture/execute/struct-cpy-1.c

   1 /* powerpc64-linux gcc miscompiled this due to rs6000.c:expand_block_move
   2    not setting mem aliasing info correctly for the code implementing the
   3    structure assignment.  */
   4
   5 struct termios
   6 {
   7   unsigned int a;
   8   unsigned int b;
   9   unsigned int c;
  10   unsigned int d;
  11   unsigned char pad[28];
  12 };
  13
  14 struct tty_driver
  15 {
  16   unsigned char pad1[38];
  17   struct termios t __attribute__ ((aligned (8)));
  18 };
  19
  20 static struct termios zero_t;
  21 static struct tty_driver pty;
  22
  23 void ini (void)
  24 {
  25   pty.t = zero_t;
  26   pty.t.a = 1;
  27   pty.t.b = 2;
  28   pty.t.c = 3;
  29   pty.t.d = 4;
  30 }
  31
  32 int main (void)
  33 {
  34   extern void abort (void);
  35
  36   ini ();
  37   if (pty.t.a != 1
  38       || pty.t.b != 2
  39       || pty.t.c != 3
  40       || pty.t.d != 4)
  41     abort ();
  42   return 0;
  43 }