sdcc/support/regression/tests/bug-2197.c

   1 /*
   2    bug-2197.c - originally part of the tests from the execute part of the gcc torture suite (see 20020503-1.c).
   3    Heavily modified to reproduce the underlying issue of bug 2197 on multiple architectures.
   4  */
   5
   6 #include <testfwk.h>
   7
   8 #if defined(__SDCC_MODEL_SMALL) || defined(__SDCC_MODEL_MEDIUM) || \
   9     (defined(__SDCC_mcs51) && defined(__SDCC_STACK_AUTO)) || defined(__SDCC_pdk15) || defined(__SDCC_pic14)
  10 #define N       32
  11 #else
  12 #define N       128
  13 #endif
  14
  15 /* PR 6534 */
  16 /* GCSE unified the two i<0 tests, but if-conversion to ui=abs(i)
  17    inserted the code at the wrong place corrupting the i<0 test.  */
  18
  19 static char *
  20 inttostr (long i, char buf[N])
  21 {
  22   unsigned long ui = i;
  23   char *p = buf + (N-1);
  24   *p = '\0';
  25   if (i < 0)
  26     ui = -ui;
  27   do
  28     *--p = '0' + ui % 10;
  29   while ((ui /= 10) != 0);
  30   if (i < 0)
  31     *--p = '-';
  32   return p;
  33 }
  34
  35 void
  36 testTortureExecute (void)
  37 {
  38 #ifndef __SDCC_pdk14 // Lack of memory
  39   char buf[N], *p;
  40
  41   p = inttostr (-1, buf);
  42
  43   ASSERT(p[0] == '-');
  44   ASSERT(p[1] == '1');
  45   ASSERT(p[2] == '\0');
  46   ASSERT(p == buf + (N-1) - 2);
  47
  48   return;
  49 #endif
  50 }