sdcc/support/regression/tests/bug-2448.c

   1 /*
   2    bug-2448.c
   3 */
   4
   5 #include <testfwk.h>
   6
   7 typedef unsigned char BYTE;
   8 typedef unsigned int WORD;
   9
  10 volatile BYTE MYDAT[8];
  11
  12 #define MAKEWORD(msb, lsb) (((WORD) (msb) << 8) | (lsb))
  13
  14 #define SETUP_VALUE() MAKEWORD (MYDAT[3], MYDAT[2])
  15 #define SETUP_INDEX() MAKEWORD (MYDAT[5], MYDAT[4])
  16 #define SETUP_LENGTH() MAKEWORD (MYDAT[7], MYDAT[6])
  17
  18 WORD badfunc (BYTE cmd)
  19 {
  20     WORD val = SETUP_VALUE();
  21     WORD idx = SETUP_INDEX();
  22     WORD len = SETUP_LENGTH();
  23     volatile WORD r = val + idx + len;
  24
  25     if (cmd == 0)
  26       return len;
  27     else
  28       return 0;
  29 }
  30
  31 void testBug (void)
  32 {
  33   MYDAT[2] = 10; // val
  34   MYDAT[3] = 0;
  35   MYDAT[4] = 11; // idx
  36   MYDAT[5] = 0;
  37   MYDAT[6] = 12; // len
  38   MYDAT[7] = 0;
  39
  40   ASSERT (badfunc (0) == 12);
  41   ASSERT (badfunc (1) == 0);
  42 }