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

[otmar dot ertl at gmail dot com]

The following code leads to enormous memory usage (>4GB) during compilation
with -O2 or -O3 optimization. The same problem occurs also in previous g++
versions (e.g. 4.3.3, 4.2.4, 4.1.3).

#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*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*i*i*i*i*i*i*i*i*i*i*i*i*i*i);
    }

    return 0;
}


-- 
           Summary: Enormous memory usage during compilation with -O2 or -O3
                    optimizations.
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: otmar dot ertl at gmail dot com
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


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