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/* dg-do run */

/* dg-options "-O2" */

/* PR target/20126 was not really target-specific, but rather a loop's

   failure to take into account the possibility that a DEST_ADDR giv

   replacement might fail, such as when you attempt to replace a REG

   with a PLUS in one of the register_operands of cmpstrqi_rex_1.  */

extern void abort (void);

typedef struct { int a; char b[3]; } S;

S c = { 2, "aa" }, d = { 2, "aa" };

void *

bar (const void *x, int y, int z)

{

  return (void *) 0;

}

int

foo (S *x, S *y)

{

  const char *e, *f, *g;

  int h;

  h = y->a;

  f = y->b;

  e = x->b;

  if (h == 1)

    return bar (e, *f, x->a) != 0;

  g = e + x->a - h;

  while (e <= g)

    {

      const char *t = e + 1;

      if (__builtin_memcmp (e, f, h) == 0)

        return 1;

      e = t;

    }

  return 0;

}

int

main (void)

{

  if (foo (&c, &d) != 1)

    abort ();

  return 0;

}