[Bug tree-optimization/57698] rev.200179 causes many errors (inlining failures) when building Firefox

[markus at trippelsdorf dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57698

--- Comment #2 from Markus Trippelsdorf <markus at trippelsdorf dot de> ---
Here's a reduced example:

 % cat test.ii
typedef bool (*IsAcceptableThis) (const int &);
inline int
fn1 (IsAcceptableThis p1)
{
    p1 (0);
    return 0;
}

__attribute__ ((always_inline))
inline bool fn2 (const int &)
{
    return 0;
}

void
fn3 ()
{
    fn1 (fn2);
}

 % g++ -c -O2 test.ii
test.ii: In function ‘void fn3()’:
test.ii:10:13: error: inlining failed in call to always_inline ‘bool fn2(const
int&)’: indirect function call with a yet undetermined callee
 inline bool fn2 (const int &)
             ^
test.ii:5:11: error: called from here
     p1 (0);
           ^