[Bug debug/42565] New: Huge compilation time with -O1 -g

["aanisimov at inbox dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

I tried to compile KDE 4.3.4 with gcc-r155523. The compilation stalled at file
globalsettings_base.cpp, which took more than 40 minutes to compile (actually,
it could have taken more, because I've simply aborted it).

In the attachement you will find the preprocessed version of this file. Sorry
to have included such a huge file, but it seems impossible to comment out some
parts of it because doing so greatly reduces the compilation time.

To reproduce, do
$ gcc -x c++ -c -O1 -g -o bug.o bug.i

It seems this problem has something to do with debug info generation for
optimized binaries, because omitting -O1 or -g makes the problem disappear.


-- 
           Summary: Huge compilation time with -O1 -g
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: aanisimov at inbox dot ru
 GCC build triplet: i686-slackware-linux
  GCC host triplet: i686-slackware-linux
GCC target triplet: i686-slackware-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42565