gcc/testsuite/gcc.dg/uninit-3.c

   1 /* Spurious uninit variable warnings, case 3.
   2    Inspired by cppexp.c (parse_charconst) */
   3 /* { dg-do compile } */
   4 /* { dg-options "-O -Wuninitialized" } */
   5
   6 extern void error (char *);
   7
   8 int
   9 parse_charconst (const char *start, const char *end)
  10 {
  11   int c; /* { dg-bogus "c" "uninitialized variable warning" } */
  12   int nchars, retval;
  13
  14   nchars = 0;
  15   retval = 0;
  16   while (start < end)
  17     {
  18       c = *start++;
  19       if (c == '\'')
  20         break;
  21       nchars++;
  22       retval += c;
  23       retval <<= 8;
  24     }
  25
  26   if (nchars == 0)
  27     return 0;
  28
  29   if (c != '\'')
  30     error ("malformed character constant");
  31
  32   return retval;
  33 }