[Bug c++/106502] Three calls to __attribute__((const)) function

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106502

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It doesn't happen unless the name() function is virtual. Reduced:


extern "C" int puts(const char*);

struct Cat
{
  virtual const char* name();
};

__attribute__((const)) Cat& cat();

int main()
{
  puts(cat().name());
}


Produces this gimple:

int main ()
{
  int D.2388;

  _1 = cat ();
  _2 = cat ();
  _3 = _2->_vptr.Cat;
  _4 = *_3;
  _5 = cat ();
  _6 = OBJ_TYPE_REF(_4;(struct Cat)_1->0B) (_5);
  puts (_6);
  D.2388 = 0;
  return D.2388;
}