modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/execute/20030222-1.c (about)

     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 would require extra shift-left-4-byte" { spu-*-* } "*" "" } */
     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  }