[Bug c++/47202] Endless recursion during mangling

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47202

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |compile-time-hog
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-12-31
     Ever Confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-12-31 
00:47:43 UTC ---
Confirmed.

With a slight change:
  Matrix (octave_idx_type r, octave_idx_type c, double val):MArray2 (r, val)

to:
  Matrix (octave_idx_type r, octave_idx_type c, double val):MArray2<double> (r,
val)

GCC 4.4.5 (and 4.3.5 with even more changes) gave the following ICE:
t.cc:248: internal compiler error: in force_constant_size, at gimplify.c:812

Here is a reduced testcase which shows the issue and does not give an ICE for
4.4 and below but rather an error:
template <class R> struct norm_accumulator_2
{
  R scl;
};

template <class R> R vector_norm (R)
{
  vector_norm (norm_accumulator_2 <R> ());
}

double xnorm (double p)
{
  vector_norm (p);
}