gcc/testsuite/gcc.c-torture/execute/20030222-1.c

   1 /* Verify that we get the low part of the long long as an int.  We
   2    used to get it wrong on big-endian machines, if register allocation
   3    succeeded at all.  We use volatile to make sure the long long is
   4    actually truncated to int, in case a single register is wide enough
   5    for a long long.  */
   6
   7 #include <limits.h>
   8
   9 void
  10 ll_to_int (long long x, volatile int *p)
  11 {
  12   int i;
  13   asm ("" : "=r" (i) : "0" (x));
  14   *p = i;
  15 }
  16
  17 int val = INT_MIN + 1;
  18
  19 int main() {
  20   volatile int i;
  21
  22   ll_to_int ((long long)val, &i);
  23   if (i != val)
  24     abort ();
  25
  26   exit (0);
  27 }