sdcc/support/regression/tests/gcc-torture-execute-20030828-2.c

   1 /*
   2    20030828-2.c from the execute part of the gcc torture tests.
   3  */
   4
   5 #include <testfwk.h>
   6
   7 #ifdef __SDCC
   8 #pragma std_c99
   9 #endif
  10
  11 struct rtx_def
  12 {
  13   int code;
  14 };
  15
  16 void
  17 testTortureExecute (void)
  18 {
  19   int tmp[2];
  20   struct rtx_def *r, s;
  21   int *p, *q;
  22
  23   /* The alias analyzer was creating the same memory tag for r, p and q
  24      because 'struct rtx_def *' is type-compatible with 'int *'.  However,
  25      the alias set of 'int[2]' is not the same as 'int *', so variable
  26      'tmp' was deemed not aliased with anything.  */
  27   r = &s;
  28   r->code = 39;
  29
  30   /* If 'r' wasn't declared, then q and tmp would have had the same memory
  31      tag.  */
  32   p = tmp;
  33   q = p + 1;
  34   *q = 0;
  35   tmp[1] = 39;
  36   if (*q != 39)
  37     ASSERT (0);
  38   return;
  39 }
  40