sdcc/support/regression/tests/bug1618050.c

   1 /** bug 1618050
   2  *    global variable px in function buggy, is marked rematr..
   3  *    and is erroneously assumed to retain its value "x" across
   4  *    the function call to fiddle_px
   5  */
   6
   7 #include <testfwk.h>
   8
   9 _STATMEM char * __data px;
  10 _STATMEM char x[2] = {0,42};
  11
  12 void
  13 fiddle_px (_STATMEM char * unused)
  14 {
  15   (volatile char) unused[0]; // shut up
  16   px++;
  17 }
  18
  19 char
  20 buggy (void)
  21 {
  22   px = x;
  23   fiddle_px (x);
  24   return *px;
  25 }
  26
  27 void
  28 testBug (void)
  29 {
  30   ASSERT (buggy () == 42);
  31 }