[Bug c++/40460] Enormous memory usage during compilation with -O2 or -O3 optimizations.

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2009-06-16 13:09 -------
Confirmed.  Exponential memory use at -O2:

26 factors: 650MB
27 factors:1255MB
28 factors:2459MB

oops... ;)

26 factor testcase:

#include <iostream>

int main() 
{
  for (int i=0;i<1;++i)
    std::cout << (i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i*i);

  return 0;
}


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |memory-hog
      Known to fail|                            |4.4.0
   Last reconfirmed|0000-00-00 00:00:00         |2009-06-16 13:09:08
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40460