this testcase segfaults: 

=== Cut ===
class A
{
public:
    A()·{ x1 = 0; x2 = -1; } 

    int·   x()· ·       const { return x1; }
    void   setX( int x ) { x1 = x; }

    int·   width()·     const { return x2 - x1 + 1; }
    void   setWidth( int w );

private:
    int x1;
    int x2;
};

A breakme()
{
    A r;

    for( int i=0 ; i < 2; i++ )
    {
        if (r.width() < r.x())
            r.setX(4);
        if (5 > r.width())
            r.setWidth(r.x());
    }

   return r;
}
=== Cut ===
g++ -O2  -c test.cpp
test.cpp:17:  internal compiler error: in create_component_ref_by_pieces, at tree-ssa-pre.c:2167