I just tried to compile the Linux kernel version 2.6.27.7 with the GNU C compiler version 4.4 snapshot 20081205.
The compiler said drivers/scsi/qla2xxx/qla_os.c: In function 'qla2x00_free_device': drivers/scsi/qla2xxx/qla_os.c:1809: internal compiler error: in gimple_rhs_has_side_effects, at gimple.c:2343 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Preprocessed source code attached. Flag -O2 required. -- Summary: ice for Linux kernel code with -O2 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=38428