I just tried to compile the attached C++ source code with both gcc 4.3.1 and gcc 4.4.0 snapshot 20081031.
gcc 431 took less than one second and consumed a trivial amount of virtual memory. gcc 440 snapshot 20081031 took over 90 seconds on an idle machine, and consumed over 11 Gig of virtual memory before running out of virtual memory. In my opinion, 11 Gig of memory is an excessive amount of memory to use. I suspect the compiler is looping without doing any productive work. Preprocessed source code attached. Flag -O2 required. -- Summary: excessive memory consumption - possible hang Product: gcc Version: 4.4.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dcb314 at hotmail dot com GCC host triplet: suse-linux-x86_64 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37991