gcc/testsuite/gcc.dg/misaligned-expand-1.c

   1 /* Test that expand can generate correct loads of misaligned data even on
   2    strict alignment platforms.  */
   3
   4 /* { dg-do run } */
   5 /* { dg-options "-O0" } */
   6
   7 extern void abort ();
   8
   9 typedef unsigned int myint __attribute__((aligned(1)));
  10
  11 unsigned int
  12 foo (myint *p)
  13 {
  14   return *p;
  15 }
  16
  17 #define cst (int) 0xdeadbeef
  18 #define NUM 8
  19
  20 struct blah
  21 {
  22   char c;
  23   myint i[NUM];
  24 };
  25
  26 struct blah g;
  27
  28 int
  29 main (int argc, char **argv)
  30 {
  31   int i, k;
  32   for (k = 0; k < NUM; k++)
  33     {
  34       g.i[k] = cst;
  35       i = foo (&g.i[k]);
  36
  37       if (i != cst)
  38         abort ();
  39     }
  40   return 0;
  41 }