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/* When comparisons of bit-fields to unsigned constants got shortened,

   the shortened signed constant was wrongly marked as overflowing,

   leading to a later integer_zerop failure and misoptimization.

   Related to bug tree-optimization/16437 but shows the problem on

   32-bit systems.  */

/* Origin: Joseph Myers <jsm@polyomino.org.uk> */

extern void abort (void);

struct s { int a:12, b:20; };

struct s x = { -123, -456 };

int

main (void)

{

  if (x.a != -123U || x.b != -456U)

    abort ();

  return 0;

}