[Bug c++/12850] New: memory consumption for heavy template instantiations tripled since 3.3

["jens dot maurer at gmx dot net" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12850

           Summary: memory consumption for heavy template instantiations
                    tripled since 3.3
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jens dot maurer at gmx dot net
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu

When compiling the attached program with g++ 3.3, the compiler takes about 80 MB
of main memory on Intel/x86. When compiling it with g++ 3.4, the compiler takes
> 400 MB and eventually crashes (potentially due to the Linux kernel killing
processes due to out-of-memory).
Since standard libraries are different between 3.3 and 3.4, I provide two
preprocessed files.  (This is boost random number library random_test.cpp.)

g++ -v rt-3.3.ii
[...]
Configured with: ../gcc-3.3/configure --prefix=/usr/local --enable-threads
--enable-shared
Thread model: posix
gcc version 3.3
(ok)

/opt/exp/gcc-3.4/bin/g++ -v rt-3.4.ii
[...]
g++: Internal error: Killed (program cc1plus)
Please submit a full bug report.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.