I just tried to compile the Linux kernel 2.6.30 with the GNU gcc version 4.5 snapshot 20090611.
The compiler said drivers/usb/host/ehci-hcd.c:1177:1: error: non-register as LHS of unary operation # .MEM_144 = VDEF <.MEM_130> qh_11(D)->qh_next.qh = (struct ehci_qh *) here$ptr_140; drivers/usb/host/ehci-hcd.c:1177:1: internal compiler error: verify_stmts failed 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: verify_stmts failed with -O2: non-register as LHS of unary operation Product: gcc Version: 4.5.0 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=40432