Following testcase causes cc1plus segfault on i386 on gcc-3_4-branch as of today.
It worked with a gcc-3_4-branch snapshot from end of January and works on 3.3
branch and trunk, so it should be handled as a regression.

// { dg-do compile }
// { dg-options "-O2" }

extern char *foo (char *, int);

struct A
{
  int i;
  void bar (char *);
};

struct B
{
  B ();
  void baz (void *);
};

struct C
{
  C (const char *, int);
};

void
A::bar (char *a)
{
  B *b;
  char *p1, *p2 = a + 512;

  while (foo (a, 511))
    {
      b = new B ();
      p1 = a;
      while (*p1)
        {
          b->baz (new C (p1, p2 - p1));
          p1 = *p2 ? p2 + 1 : p2;
        }
    }
}