sdcc/support/regression/tests/bug-467035.c

   1 /* Tests a bug in for loops where b in plot_point is always 1.
   2    Stripped down from the gbdk filltest.c
   3  */
   4 #include <testfwk.h>
   5
   6 typedef unsigned char UBYTE;
   7
   8 UBYTE
   9 getpix(UBYTE x, UBYTE y)
  10 {
  11   UNUSED(x);
  12   UNUSED(y);
  13
  14   return 0;
  15 }
  16
  17 void
  18 color(UBYTE a, UBYTE b, UBYTE c)
  19 {
  20   UNUSED(a & b & c);
  21 }
  22
  23 void
  24 line(UBYTE a, UBYTE b, UBYTE c, UBYTE d)
  25 {
  26   UNUSED(a & b & c & d);
  27 }
  28
  29 void
  30 plot_point(UBYTE a, UBYTE b)
  31 {
  32   static UBYTE ea, eb;
  33
  34   ASSERT(b == eb);
  35   ASSERT(a == ea);
  36
  37   ea++;
  38   if (ea > 12) {
  39     ea = 0;
  40     eb++;
  41   }
  42   LOG(("(a, b) -> (%u, %u)\n", (unsigned int)a, (unsigned int)b));
  43 }
  44
  45 void
  46 testForMerge(void)
  47 {
  48   UBYTE  a,b;
  49
  50   for (b=0; b<=10U; b++) {
  51     for (a=0; a<=12U; a++) {
  52       color(getpix(a,b+1), 0, 1);
  53       plot_point(a,b);
  54     }
  55     color(0, 0, 1);
  56   }
  57 }