gcc/testsuite/gcc.c-torture/execute/pr7284-1.c

   1 /* Signed left-shift is implementation-defined in C89 (and see
   2    DR#081), not undefined.  Bug 7284 from Al Grant (AlGrant at
   3    myrealbox.com).  */
   4
   5 /* { dg-options "-std=c89" } */
   6
   7 extern void abort (void);
   8 extern void exit (int);
   9
  10 int
  11 f (int n)
  12 {
  13   return (n << 24) / (1 << 23);
  14 }
  15
  16 volatile int x = 128;
  17
  18 int
  19 main (void)
  20 {
  21   if (f(x) != -256)
  22     abort ();
  23   exit (0);
  24 }