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/* { dg-do run } */
/* { dg-require-effective-target stdint_types } */
/* { dg-options "" } */
#include <stdint.h>
 
extern void abort (void);
 
int main (void)
{
  uint32_t a = 0x80000000;
  uint32_t b;
 
  b = __builtin_bswap32 (a);
  a = __builtin_bswap32 (b);
 
  if (b != 0x80 || a != 0x80000000)
    abort ();
 
  return 0;
}