[Bug c/30559] New: compiler loops forever with flag -O3

[dcb314 at hotmail dot com]

I just tried to compile Suse Linux package libnasl-2.2.6-40
with the new GNU C compiler version 4.3 snapshot 20070119.

I used compiler flag -O3. The compiler appeared to hang
for more than 30 minutes when compiling source code file regex.c.

I tried compiling the same file with the same compiler and
flag -O2 and the compiler took 5 seconds.

I tried compiling the same file with gcc 4.1.2 and flag -O3
and that compiler took 2.3 seconds.

I checked the memory usage of the 20070119 compiler and
it was about 40Megs on an idle system with 512Meg of RAM 
fitted.

Preprocessed source code attached. Flag -O3 required.


-- 
           Summary: compiler loops forever with flag -O3
           Product: gcc
           Version: 4.3.0
            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: x86_64-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30559