sdcc/support/regression/tests/bug1536762.c

   1 /*
   2    bug1536762.c
   3 */
   4
   5 #include <testfwk.h>
   6 #include <string.h>
   7 #include <stdint.h>
   8
   9 __xdata uint8_t c = 1;
  10
  11 struct d {
  12   __xdata struct d *n;
  13   uint8_t f;
  14   uint8_t s;
  15   __xdata uint8_t *buffer;
  16   uint16_t length;
  17 };
  18
  19
  20 __xdata struct d xd = {&xd, 1, 0xab, &c, 3};
  21
  22
  23 struct {
  24   __xdata struct d *c;
  25   int16_t count;
  26   __xdata uint8_t *bptr;
  27 } s = {&xd, -1, &c};
  28
  29
  30 void
  31 blurb (void)
  32 {
  33   if (s.count < 0)
  34     {
  35       s.c->s = 0xef;
  36       s.count = s.c->length - 1;
  37       s.bptr = s.c->buffer;
  38     }
  39   *s.bptr = 0;
  40   s.bptr++;
  41   s.count--;
  42 }
  43
  44
  45 void
  46 testBug (void)
  47 {
  48   ASSERT (xd.s == 0xab);
  49   ASSERT (s.c->s == 0xab);
  50
  51   s.c->s = 0xcd;
  52
  53   ASSERT (xd.s == 0xcd);
  54   ASSERT (s.c->s == 0xcd);
  55
  56   blurb ();
  57
  58   ASSERT (xd.s == 0xef);
  59   ASSERT (s.c->s == 0xef);
  60   ASSERT (c == 0);
  61 }