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// This testcase was miscompiled on s390x, because strength-reduction

// did not see biv in C::foo as used after loop, but it was used

// in a REG_EQUAL note.

// { dg-do run }

// { dg-options "-O2" }

extern "C" void abort (void);

struct C

{

  int foo (char ch, int offset = __INT_MAX__) const;

  int bar (int offset, char c) const;

  char *a;

};

int C::bar (int offset, char c) const

{

  char ch = a[offset];

  if (ch < c)

    return -1;

  if (ch > c)

    return 1;

  return 0;

}

int C::foo (char ch, int offset) const

{

  int len = __builtin_strlen (a);

  if (len == 0)

    return __INT_MAX__;

  if (offset >= len)

    offset = len - 1;

  while (bar (offset, ch) != 0)

    {

      if (offset == 0)

        return __INT_MAX__;

      offset--;

    }

  return offset;

}

int main (void)

{

  C c;

  c.a = "/some/dir/file.ext";

  if (c.foo ('/') != 9)

    abort ();

  return 0;

}