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/* isdigit(c) can be optimized to ((unsigned)c) - '0' <= 9, but only if
   we know the correct value of '0'.  PR 18785.  */
 
/* { dg-do run } */
/* { dg-require-iconv "IBM1047" } */
/* { dg-options "-O2 -fno-inline -fexec-charset=IBM1047" } */
 
extern int isdigit(int);
extern void abort(void);
 
static int str1(void) { return '1'; }
static int strA(void) { return 'A'; }
 
int
main(void)
{
  if (!isdigit('1'))
    abort();
  if (isdigit('A'))
    abort();
  if (!isdigit(str1()))
    abort();
  if (isdigit(strA()))
    abort();
  return 0;
}