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 /* { dg-skip-if "asm requires register allocation" { nvptx-*-* } } */
   7 #include <limits.h>
   8
   9 void abort (void);
  10 void exit (int);
  11
  12 void
  13 ll_to_int (long long x, volatile int *p)
  14 {
  15   int i;
  16   asm ("" : "=r" (i) : "0" (x));
  17   *p = i;
  18 }
  19
  20 int val = INT_MIN + 1;
  21
  22 int main() {
  23   volatile int i;
  24
  25   ll_to_int ((long long)val, &i);
  26   if (i != val)
  27     abort ();
  28
  29   exit (0);
  30 }