I just tried to compile the attached code with the snapshot 4.3-20061216 C compiler.
The compiler said [EMAIL PROTECTED]:~/gnu/20061216/bugs> ~/gnu/20061216/results/bin/gcc -c -O2 bug27.c bug27.c: In function 'conf': bug27.c:4452: internal compiler error: in insert_into_preds_of_block, at tree-ssa-pre.c:2750 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. -- Summary: ice for legal code with -O2 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-pc http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30244