File: 20180112-1.c

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/* PR rtl-optimization/83565 */
/* Testcase by Sergei Trofimovich <slyfox@inbox.ru> */

extern void abort (void);

typedef __UINT32_TYPE__ u32;

u32 bug (u32 * result) __attribute__((noinline));
u32 bug (u32 * result)
{
  volatile u32 ss = 0xFFFFffff;
  volatile u32 d  = 0xEEEEeeee;
  u32 tt = d & 0x00800000;
  u32 r  = tt << 8;

  r = (r >> 31) | (r <<  1);

  u32 u = r^ss;
  u32 off = u >> 1;

  *result = tt;
  return off;
}

int main(void)
{
  u32 l;
  u32 off = bug(&l);
  if (off != 0x7fffffff)
    abort ();
  return 0;
}