gcc/testsuite/gcc.c-torture/execute/20050125-1.c

   1 /* Verify that the CALL sideeffect isn't optimized away.  */
   2 /* Contributed by Greg Parker  25 Jan 2005  <gparker@apple.com> */
   3
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6
   7 struct parse {
   8   char *next;
   9   char *end;
  10   int error;
  11 };
  12
  13 int seterr(struct parse *p, int err)
  14 {
  15   p->error = err;
  16   return 0;
  17 }
  18
  19 void bracket_empty(struct parse *p)
  20 {
  21   if (((p->next < p->end) && (*p->next++) == ']')  ||  seterr(p, 7)) { }
  22 }
  23
  24 int main(int argc __attribute__((unused)), char **argv __attribute__((unused)))
  25 {
  26   struct parse p;
  27   p.next = p.end = (char *)0x12345;
  28
  29   p.error = 0;
  30   bracket_empty(&p);
  31   if (p.error != 7)
  32     abort ();
  33
  34   return 0;
  35 }