just tried to compile a recent Linux kernel [ 2.6.15] with a recent GNU C compiler version 4.2 snapshot 20060107. It said
fs/sysfs/inode.c:227: error: missing definition for SSA_NAME: entry_36 in statement: # sysfs_dir_cachep_65 = V_MAY_DEF <sysfs_dir_cachep_64>; sd_31->s_sibling.next = entry_36; fs/sysfs/inode.c:227: internal compiler error: verify_ssa failed Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. make[2]: *** [fs/sysfs/inode.o] Error 1 It seems the crash only appears when -Os flag is used. Preprocessed source code available on request. -- Summary: ice for legal kernel code with -Os Product: gcc Version: 4.2.0 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_x64-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25734
