Using a slightly modified version of the testcase from PR33834 I get a segfault in vect_is_simple_use. Unlike the other PR, which goes back several months, this ICE doesn't happen with 20070916 (but with current trunk). It also triggers at -O rather than -O2 (and -ftree-vectorize, obviously).
(sid)29588:[EMAIL PROTECTED]: ~] /usr/lib/gcc-snapshot/bin/g++ -c -O -ftree-vectorize psicode-internals2.cc psicode-internals2.cc: In member function 'void internals::compute_s()': psicode-internals2.cc:43: internal compiler error: Segmentation fault Please submit a full bug report, -- Summary: [4.3 Regression] Segfault in vect_is_simple_use Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: tbm at cyrius dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33835