gcc-4.9/gcc/testsuite/gcc.dg/pr54676.c


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/* PR tree-optimization/54676 */
/* { dg-do compile } */
/* { dg-options "-O -fno-tree-ccp -fno-tree-copy-prop -fno-tree-fre -ftree-vrp" } */

struct S
{
  int s:1;
};

struct S bar (void);

#if __SIZEOF_INT__ < 4
#define int __INT32_TYPE__
#endif

int a;

void
foo (int x)
{
  struct S s = bar ();
  while (!a)
    {
      int l = 94967295;
      a = x || (s.s &= l);
    }
}