gcc/testsuite/gcc.dg/20000108-1.c

   1 /* Copyright (C) 2000  Free Software Foundation.
   2
   3    by Alexandre Oliva  <oliva@lsd.ic.unicamp.br>  */
   4
   5 /* { dg-do run } */
   6 /* { dg-options "-O3" } */
   7
   8 extern void abort (void);
   9
  10 void foo () {} /* unused, but essential to trigger the bug */
  11
  12 int main () {
  13   int i;
  14   /* use asms to prevent optimizations */
  15   /* i = -1; */ asm ("" : "=r" (i) : "0" (-1));
  16   /* i =  1; */ asm ("" : "=r" (i) : "0" (i ? 1 : 2));
  17   if (i != 1)
  18     abort();
  19   return 0;
  20 }