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/* PR tree-optimization/20640 */

/* After unrolling the loop, we'd turn some conditional branches into

   unconditional ones, but branch redirection would fail to compute

   the PHI args for the PHI nodes in the replacement edge

   destination, so they'd remain NULL causing crashes later on.  */

/* { dg-do compile } */

static int a = 0;

extern int foo (void);

extern int *bar (void) __attribute__ ((__const__));

void

test (int x)

{

  int b = 10;

  while (foo () == -1 && *bar () == 4 && b > 0)

    --b;

  a = x;

}